/* roulang page: index */
:root {
            --bg-primary: #0A0A0A;
            --bg-secondary: #141414;
            --bg-tertiary: #1A1A1A;
            --accent-cyan: #00F0FF;
            --accent-orange: #FF4D00;
            --text-heading: #FFFFFF;
            --text-body: #B0B0B0;
            --text-muted: #707070;
            --text-dim: #555555;
            --border-color: #2A2A2A;
            --border-light: #1E1E1E;
            --radius-sm: 4px;
            --radius-md: 6px;
            --radius-lg: 8px;
            --radius-xl: 12px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.6);
            --shadow-glow-orange: 0 0 12px rgba(255, 77, 0, 0.5);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-mono: 'Space Mono', 'Inter', monospace;
            --site-padding: 5%;
            --section-gap: 120px;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
            --transition-slow: 0.6s ease;
            --nav-height: 68px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-body);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
            letter-spacing: 0.01em;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-heading);
            font-weight: 700;
            line-height: 1.25;
        }

        h1 {
            font-size: 48px;
            font-weight: 700;
        }
        h2 {
            font-size: 36px;
            font-weight: 700;
        }
        h3 {
            font-size: 24px;
            font-weight: 600;
        }
        h4 {
            font-size: 18px;
            font-weight: 600;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: var(--site-padding);
            padding-right: var(--site-padding);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 12px;
            position: relative;
        }
        .section-label::after {
            content: '';
            display: inline-block;
            width: 24px;
            height: 1px;
            background: var(--accent-cyan);
            margin-left: 10px;
            vertical-align: middle;
            opacity: 0.6;
        }

        .section-title {
            font-size: 36px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-body);
            max-width: 640px;
            line-height: 1.8;
        }

        /* ========== NAVIGATION ========== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 10, 10, 0.88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            transition: background var(--transition-normal);
        }
        .site-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }
        .nav-logo svg {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
        }
        .nav-logo-badge {
            display: inline-block;
            font-size: 10px;
            font-weight: 700;
            background: var(--accent-orange);
            color: #0A0A0A;
            padding: 3px 7px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.04em;
            margin-left: 4px;
            line-height: 1;
            animation: pulse-badge 2s ease-in-out infinite;
        }
        @keyframes pulse-badge {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.7;
            }
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
        }
        .nav-links a {
            display: block;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
            letter-spacing: 0.02em;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-cyan);
        }
        .nav-links a.active {
            background: rgba(0, 240, 255, 0.06);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: all var(--transition-fast);
            transform: translateX(-50%);
            border-radius: 1px;
        }
        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 28px;
        }
        .nav-hot-badge {
            display: inline-block;
            font-size: 9px;
            font-weight: 700;
            background: var(--accent-orange);
            color: #fff;
            padding: 2px 5px;
            border-radius: 3px;
            margin-left: 4px;
            letter-spacing: 0.05em;
            vertical-align: middle;
            line-height: 1;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .nav-countdown {
            font-family: var(--font-mono);
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-orange);
            letter-spacing: 0.03em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .nav-countdown-dot {
            width: 6px;
            height: 6px;
            background: var(--accent-orange);
            border-radius: 50%;
            animation: blink-dot 1s ease-in-out infinite;
        }
        @keyframes blink-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.3;
            }
        }
        .btn-nav-cta {
            display: inline-block;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            background: var(--accent-cyan);
            color: #0A0A0A;
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            letter-spacing: 0.03em;
            white-space: nowrap;
            cursor: pointer;
        }
        .btn-nav-cta:hover {
            box-shadow: var(--shadow-glow);
            transform: scale(1.04);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            z-index: 1001;
            padding: 6px;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-heading);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 10, 10, 0.97);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 20px;
            padding: 40px;
        }
        .mobile-menu.active {
            display: flex;
        }
        .mobile-menu a {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-heading);
            padding: 12px 24px;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.05);
        }
        .mobile-menu .btn-nav-cta {
            margin-top: 16px;
            font-size: 16px;
            padding: 14px 32px;
        }

        /* ========== HERO ========== */
        .hero-section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-1.webp') no-repeat center center;
            background-size: cover;
            position: relative;
            padding-top: var(--nav-height);
            isolation: isolate;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 10, 10, 0.75) 0%, rgba(10, 10, 10, 0.88) 60%, rgba(10, 10, 10, 0.95) 100%);
            z-index: 0;
        }
        .hero-content {
            position: relative;
            z-index: 1;
            width: 100%;
            text-align: center;
            padding: 60px 0;
        }
        .hero-badge-row {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-bottom: 28px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            padding: 7px 14px;
            border-radius: var(--radius-full);
            letter-spacing: 0.04em;
            border: 1px solid var(--border-color);
            background: rgba(20, 20, 20, 0.7);
            color: var(--text-body);
            white-space: nowrap;
        }
        .hero-badge .badge-icon {
            width: 16px;
            height: 16px;
            color: var(--accent-cyan);
        }
        .hero-badge.highlight {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.06);
        }
        .hero-title {
            font-size: 64px;
            font-weight: 800;
            color: var(--text-heading);
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            line-height: 1.1;
            text-shadow: 0 0 60px rgba(0, 240, 255, 0.25);
        }
        .hero-title .highlight {
            color: var(--accent-cyan);
        }
        .hero-subtitle {
            font-size: 20px;
            color: var(--text-body);
            max-width: 680px;
            margin: 0 auto 36px;
            line-height: 1.7;
            letter-spacing: 0.01em;
        }
        .hero-cta-row {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
            margin-bottom: 40px;
        }
        .btn-primary {
            display: inline-block;
            padding: 15px 36px;
            font-size: 16px;
            font-weight: 600;
            background: var(--accent-cyan);
            color: #0A0A0A;
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            letter-spacing: 0.03em;
            cursor: pointer;
            border: 2px solid var(--accent-cyan);
        }
        .btn-primary:hover {
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px) scale(1.03);
        }
        .btn-secondary {
            display: inline-block;
            padding: 15px 36px;
            font-size: 16px;
            font-weight: 600;
            background: transparent;
            color: var(--accent-orange);
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            letter-spacing: 0.03em;
            cursor: pointer;
            border: 2px solid var(--accent-orange);
        }
        .btn-secondary:hover {
            background: var(--accent-orange);
            color: #0A0A0A;
            box-shadow: var(--shadow-glow-orange);
            transform: translateY(-2px);
        }
        .hero-scroll-indicator {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1;
            animation: bounce-down 2s ease-in-out infinite;
        }
        .hero-scroll-indicator svg {
            width: 28px;
            height: 28px;
            color: var(--text-muted);
        }
        @keyframes bounce-down {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(10px);
            }
        }

        /* ========== SECTIONS ========== */
        section {
            padding: var(--section-gap) 0;
            position: relative;
        }
        .section-dark {
            background: var(--bg-secondary);
        }
        .section-darker {
            background: var(--bg-primary);
        }
        .section-divider {
            border-top: 1px solid var(--border-color);
        }

        /* ========== METRICS BOARD ========== */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--bg-secondary);
        }
        .metric-item {
            padding: 40px 28px;
            text-align: center;
            border-right: 1px solid var(--border-color);
            position: relative;
            transition: background var(--transition-normal);
        }
        .metric-item:last-child {
            border-right: none;
        }
        .metric-item:hover {
            background: rgba(0, 240, 255, 0.03);
        }
        .metric-number {
            font-family: var(--font-mono);
            font-size: 72px;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: -0.03em;
            line-height: 1;
            margin-bottom: 8px;
        }
        .metric-unit {
            font-size: 24px;
            font-weight: 400;
            color: var(--accent-cyan);
            opacity: 0.7;
        }
        .metric-label {
            font-size: 14px;
            color: var(--text-muted);
            letter-spacing: 0.03em;
        }
        .metric-detail {
            font-size: 12px;
            color: var(--text-dim);
            margin-top: 4px;
        }

        /* ========== BENEFITS GRID ========== */
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .benefit-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
        }
        .benefit-card:hover {
            border-color: var(--accent-cyan);
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.08);
        }
        .benefit-card .benefit-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-md);
            background: rgba(0, 240, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            color: var(--accent-cyan);
        }
        .benefit-card h4 {
            margin-bottom: 8px;
            font-size: 17px;
        }
        .benefit-card p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
        }
        .benefit-card .badge-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: var(--radius-full);
            background: rgba(255, 77, 0, 0.12);
            color: var(--accent-orange);
            margin-top: 12px;
            letter-spacing: 0.04em;
        }

        /* ========== SERVICE MATRIX - ASYMMETRIC ========== */
        .service-matrix {
            display: grid;
            grid-template-columns: 2fr 1fr;
            grid-template-rows: auto auto;
            gap: 20px;
        }
        .service-card-large {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            grid-row: 1 / 3;
            transition: all var(--transition-normal);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            position: relative;
            overflow: hidden;
        }
        .service-card-large:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.06);
            transform: translateY(-3px);
        }
        .service-card-large .service-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            margin-bottom: 20px;
        }
        .service-card-large h3 {
            font-size: 26px;
            margin-bottom: 10px;
        }
        .service-card-large p {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .service-card-small {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px 22px;
            transition: all var(--transition-normal);
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .service-card-small:hover {
            border-color: var(--accent-cyan);
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.06);
        }
        .service-card-small .service-icon-sm {
            width: 40px;
            height: 40px;
            flex-shrink: 0;
            border-radius: var(--radius-md);
            background: rgba(0, 240, 255, 0.07);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
        }
        .service-card-small h4 {
            font-size: 16px;
            margin-bottom: 4px;
        }
        .service-card-small p {
            font-size: 13px;
            color: var(--text-body);
            line-height: 1.6;
        }
        .link-arrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .link-arrow:hover {
            gap: 10px;
        }
        .link-arrow svg {
            width: 16px;
            height: 16px;
            transition: transform var(--transition-fast);
        }
        .link-arrow:hover svg {
            transform: translateX(3px);
        }

        /* ========== COMPARISON ========== */
        .comparison-wrapper {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            gap: 0;
            align-items: stretch;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }
        .comparison-col {
            padding: 40px 32px;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .comparison-col.before {
            background: rgba(255, 77, 0, 0.03);
        }
        .comparison-col.after {
            background: rgba(0, 240, 255, 0.02);
        }
        .comparison-col h4 {
            font-size: 15px;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 4px;
        }
        .comparison-col.before h4 {
            color: var(--accent-orange);
        }
        .comparison-col.after h4 {
            color: var(--accent-cyan);
        }
        .comparison-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
        }
        .comparison-item:last-child {
            border-bottom: none;
        }
        .comparison-val {
            font-family: var(--font-mono);
            font-weight: 700;
            font-size: 18px;
            color: var(--accent-cyan);
        }
        .comparison-val.negative {
            color: var(--accent-orange);
        }
        .comparison-vs {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0 20px;
            font-family: var(--font-mono);
            font-size: 20px;
            font-weight: 800;
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.04);
            letter-spacing: 0.04em;
            min-width: 60px;
        }

        /* ========== BRAND INTRO ========== */
        .brand-intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .brand-intro-text h2 {
            margin-bottom: 16px;
        }
        .brand-intro-text p {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.9;
            margin-bottom: 12px;
        }
        .brand-intro-img {
            width: 100%;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        /* ========== HOT LIST ========== */
        .hotlist-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .hotlist-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 20px 18px;
            text-align: center;
            transition: all var(--transition-normal);
            position: relative;
        }
        .hotlist-card:hover {
            border-color: var(--accent-cyan);
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.06);
        }
        .hotlist-rank {
            font-family: var(--font-mono);
            font-size: 40px;
            font-weight: 800;
            color: var(--accent-cyan);
            opacity: 0.3;
            position: absolute;
            top: 10px;
            right: 16px;
            line-height: 1;
        }
        .hotlist-card h4 {
            font-size: 15px;
            margin-bottom: 6px;
            position: relative;
            z-index: 1;
        }
        .hotlist-card p {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .hotlist-card .btn-sm {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 7px 16px;
            border-radius: var(--radius-md);
            background: var(--accent-cyan);
            color: #0A0A0A;
            cursor: pointer;
            transition: all var(--transition-fast);
            position: relative;
            z-index: 1;
        }
        .hotlist-card .btn-sm:hover {
            box-shadow: var(--shadow-glow);
        }

        /* ========== NEWS LIST ========== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--bg-secondary);
        }
        .news-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding: 20px 24px;
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition-fast);
        }
        .news-item:last-child {
            border-bottom: none;
        }
        .news-item:hover {
            background: rgba(0, 240, 255, 0.02);
        }
        .news-date {
            font-family: var(--font-mono);
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-orange);
            white-space: nowrap;
            min-width: 48px;
            padding-top: 2px;
        }
        .news-content h4 {
            font-size: 16px;
            margin-bottom: 4px;
            color: var(--text-heading);
        }
        .news-content p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.6;
            margin-bottom: 6px;
        }
        .news-content .link-arrow {
            font-size: 13px;
        }

        /* ========== GUIDE ========== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .guide-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-normal);
        }
        .guide-card:hover {
            border-color: var(--accent-cyan);
            transform: translateY(-3px);
        }
        .guide-step-num {
            font-family: var(--font-mono);
            font-size: 48px;
            font-weight: 800;
            color: var(--accent-cyan);
            opacity: 0.25;
            margin-bottom: 8px;
            line-height: 1;
        }
        .guide-card h4 {
            font-size: 16px;
            margin-bottom: 8px;
        }
        .guide-card p {
            font-size: 13px;
            color: var(--text-body);
            line-height: 1.7;
        }

        /* ========== REVIEWS ========== */
        .reviews-header {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 28px;
            flex-wrap: wrap;
        }
        .reviews-stars {
            font-size: 28px;
            color: #FFB800;
            letter-spacing: 2px;
        }
        .reviews-score {
            font-family: var(--font-mono);
            font-size: 40px;
            font-weight: 700;
            color: var(--text-heading);
        }
        .review-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }
        .review-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 22px 20px;
            transition: all var(--transition-normal);
        }
        .review-card:hover {
            border-color: var(--accent-cyan);
            transform: translateY(-3px);
        }
        .review-card .reviewer {
            font-weight: 600;
            font-size: 14px;
            color: var(--text-heading);
            margin-bottom: 4px;
        }
        .review-card .review-text {
            font-size: 13px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 8px;
        }
        .review-card .review-stars {
            color: #FFB800;
            font-size: 14px;
            letter-spacing: 1px;
        }

        /* ========== PLATFORM SECURITY ========== */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .security-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px 18px;
            text-align: center;
            transition: all var(--transition-normal);
        }
        .security-card:hover {
            border-color: var(--accent-cyan);
            transform: translateY(-3px);
        }
        .security-card .sec-icon {
            width: 40px;
            height: 40px;
            margin: 0 auto 12px;
            color: var(--accent-cyan);
        }
        .security-card h4 {
            font-size: 14px;
            margin-bottom: 4px;
        }
        .security-card p {
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item.active {
            border-color: var(--accent-cyan);
        }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            transition: color var(--transition-fast);
            user-select: none;
        }
        .faq-question:hover {
            color: var(--accent-cyan);
        }
        .faq-icon {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            transition: transform var(--transition-normal);
            color: var(--text-muted);
        }
        .faq-item.active .faq-icon {
            transform: rotate(180deg);
            color: var(--accent-cyan);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.8;
        }

        /* ========== CTA FORM ========== */
        .cta-form-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .form-wrapper {
            max-width: 560px;
            margin: 0 auto;
            text-align: center;
        }
        .form-wrapper h2 {
            margin-bottom: 8px;
        }
        .form-wrapper .section-desc {
            margin: 0 auto 28px;
        }
        .form-group {
            margin-bottom: 16px;
            text-align: left;
        }
        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-body);
            margin-bottom: 6px;
            letter-spacing: 0.03em;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 14px 16px;
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            color: var(--text-heading);
            font-size: 15px;
            transition: border-color var(--transition-fast);
            resize: vertical;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--accent-cyan);
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.06);
        }
        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: var(--text-dim);
        }
        .btn-submit {
            width: 100%;
            padding: 15px 32px;
            font-size: 16px;
            font-weight: 600;
            background: var(--accent-cyan);
            color: #0A0A0A;
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all var(--transition-normal);
            letter-spacing: 0.03em;
            border: 2px solid var(--accent-cyan);
            margin-top: 8px;
        }
        .btn-submit:hover {
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-color);
            padding: 50px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 10px;
            letter-spacing: -0.02em;
        }
        .footer-brand p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }
        .footer-col a {
            display: block;
            font-size: 13px;
            color: var(--text-muted);
            padding: 5px 0;
            transition: color var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: var(--text-dim);
            justify-content: space-between;
            align-items: center;
        }
        .footer-bottom a {
            color: var(--text-dim);
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom span {
            white-space: nowrap;
        }

        /* ========== ANIMATIONS ========== */
        .fade-in-up {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity var(--transition-slow), transform var(--transition-slow);
        }
        .fade-in-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 80px;
                --site-padding: 24px;
            }
            h1 {
                font-size: 42px;
            }
            h2 {
                font-size: 30px;
            }
            .hero-title {
                font-size: 48px;
            }
            .hero-subtitle {
                font-size: 17px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .metric-item {
                border-right: 1px solid var(--border-color);
                border-bottom: 1px solid var(--border-color);
            }
            .metric-item:nth-child(2) {
                border-right: none;
            }
            .metric-item:nth-child(3) {
                border-bottom: none;
            }
            .metric-item:nth-child(4) {
                border-bottom: none;
                border-right: none;
            }
            .metric-number {
                font-size: 52px;
            }
            .benefits-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-matrix {
                grid-template-columns: 1fr;
                grid-template-rows: auto;
            }
            .service-card-large {
                grid-row: auto;
            }
            .comparison-wrapper {
                grid-template-columns: 1fr;
            }
            .comparison-vs {
                padding: 16px;
            }
            .brand-intro-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .hotlist-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .review-cards {
                grid-template-columns: repeat(2, 1fr);
            }
            .security-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .nav-links {
                gap: 2px;
            }
            .nav-links a {
                padding: 8px 10px;
                font-size: 13px;
            }
            .nav-countdown {
                font-size: 11px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 60px;
                --site-padding: 20px;
                --nav-height: 60px;
            }
            h1 {
                font-size: 36px;
            }
            h2 {
                font-size: 26px;
            }
            h3 {
                font-size: 20px;
            }
            .hero-title {
                font-size: 36px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-badge-row {
                gap: 6px;
            }
            .hero-badge {
                font-size: 10px;
                padding: 5px 10px;
            }
            .nav-links {
                display: none;
            }
            .nav-actions .nav-countdown {
                display: none;
            }
            .nav-actions .btn-nav-cta {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .metric-item {
                border-right: none;
                border-bottom: 1px solid var(--border-color);
            }
            .metric-item:last-child {
                border-bottom: none;
            }
            .metric-number {
                font-size: 48px;
            }
            .benefits-grid {
                grid-template-columns: 1fr;
            }
            .comparison-col {
                padding: 24px 20px;
            }
            .hotlist-grid {
                grid-template-columns: 1fr;
            }
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .review-cards {
                grid-template-columns: 1fr;
            }
            .security-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .btn-primary,
            .btn-secondary {
                padding: 13px 24px;
                font-size: 14px;
            }
            .hero-cta-row {
                flex-direction: column;
                align-items: center;
            }
            .news-item {
                flex-direction: column;
                gap: 8px;
            }
            .comparison-vs {
                font-size: 16px;
                padding: 12px;
            }
            section {
                padding: 50px 0;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 30px;
            }
            .hero-subtitle {
                font-size: 14px;
            }
            .metric-number {
                font-size: 38px;
            }
            .section-title {
                font-size: 22px;
            }
            .hero-badge-row {
                gap: 4px;
            }
            .hero-badge {
                font-size: 9px;
                padding: 4px 8px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0A0A0A;
            --bg-secondary: #141414;
            --bg-tertiary: #1A1A1A;
            --accent-cyan: #00F0FF;
            --accent-orange: #FF4D00;
            --text-heading: #FFFFFF;
            --text-body: #B0B0B0;
            --text-muted: #707070;
            --text-dim: #555555;
            --border-color: #2A2A2A;
            --border-light: #1E1E1E;
            --radius-sm: 4px;
            --radius-md: 6px;
            --radius-lg: 8px;
            --radius-xl: 12px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.6);
            --shadow-glow-orange: 0 0 12px rgba(255, 77, 0, 0.5);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-mono: 'Space Mono', 'Inter', monospace;
            --site-padding: 5%;
            --section-gap: 100px;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
            --transition-slow: 0.6s ease;
            --nav-height: 68px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-body);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
            letter-spacing: 0.01em;
            padding-top: var(--nav-height);
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: var(--site-padding);
            padding-right: var(--site-padding);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 12px;
            position: relative;
        }

        .section-label::after {
            content: '';
            display: inline-block;
            width: 24px;
            height: 1px;
            background: var(--accent-cyan);
            margin-left: 10px;
            vertical-align: middle;
            opacity: 0.6;
        }

        .section-title {
            font-size: 36px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
            line-height: 1.25;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-body);
            max-width: 640px;
            line-height: 1.8;
        }

        /* ========== NAVIGATION ========== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 10, 10, 0.88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            transition: background var(--transition-normal);
        }

        .site-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }

        .nav-logo svg {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
        }

        .nav-logo-badge {
            display: inline-block;
            font-size: 10px;
            font-weight: 700;
            background: var(--accent-orange);
            color: #0A0A0A;
            padding: 3px 7px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.04em;
            margin-left: 4px;
            line-height: 1;
            animation: pulse-badge 2s ease-in-out infinite;
        }

        @keyframes pulse-badge {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.7;
            }
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
        }

        .nav-links a {
            display: block;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-cyan);
        }

        .nav-links a.active {
            background: rgba(0, 240, 255, 0.06);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: all var(--transition-fast);
            transform: translateX(-50%);
            border-radius: 1px;
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 60%;
        }

        .nav-hot-badge {
            display: inline-block;
            font-size: 9px;
            font-weight: 700;
            background: var(--accent-orange);
            color: #0A0A0A;
            padding: 2px 5px;
            border-radius: 3px;
            letter-spacing: 0.04em;
            margin-left: 5px;
            vertical-align: middle;
            line-height: 1;
            animation: pulse-badge 1.5s ease-in-out infinite;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .nav-countdown {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-body);
            font-family: var(--font-mono);
            letter-spacing: 0.02em;
        }

        .nav-countdown-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-orange);
            animation: pulse-dot 1.2s ease-in-out infinite;
            flex-shrink: 0;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(255, 77, 0, 0.6);
            }
            50% {
                box-shadow: 0 0 0 8px rgba(255, 77, 0, 0);
            }
        }

        #countdownDisplay {
            color: var(--accent-orange);
            font-weight: 600;
        }

        .btn-nav-cta {
            display: inline-block;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            background: var(--accent-cyan);
            color: #0A0A0A;
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .btn-nav-cta:hover {
            box-shadow: var(--shadow-glow);
            transform: translateY(-1px);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            z-index: 1001;
            flex-shrink: 0;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-heading);
            border-radius: 2px;
            transition: all var(--transition-normal);
        }

        /* ========== CATEGORY HERO ========== */
        .category-hero {
            position: relative;
            min-height: 65vh;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            background-color: var(--bg-primary);
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 10, 10, 0.75) 0%, rgba(10, 10, 10, 0.92) 100%);
            z-index: 1;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            max-width: 800px;
        }

        .category-hero .hero-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            color: #0A0A0A;
            background: var(--accent-cyan);
            padding: 6px 14px;
            border-radius: var(--radius-full);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 24px;
        }

        .category-hero .hero-title {
            font-size: 52px;
            font-weight: 800;
            color: var(--text-heading);
            letter-spacing: -0.02em;
            line-height: 1.15;
            margin-bottom: 20px;
        }

        .category-hero .hero-title span {
            color: var(--accent-cyan);
        }

        .category-hero .hero-subtitle {
            font-size: 18px;
            color: var(--text-body);
            line-height: 1.7;
            max-width: 600px;
            margin-bottom: 36px;
        }

        .category-hero .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-block;
            padding: 14px 32px;
            font-size: 15px;
            font-weight: 600;
            background: var(--accent-cyan);
            color: #0A0A0A;
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            letter-spacing: 0.02em;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }

        .btn-outline {
            display: inline-block;
            padding: 14px 32px;
            font-size: 15px;
            font-weight: 600;
            background: transparent;
            border: 1px solid var(--accent-orange);
            color: var(--accent-orange);
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            letter-spacing: 0.02em;
        }

        .btn-outline:hover {
            background: var(--accent-orange);
            color: #0A0A0A;
            box-shadow: var(--shadow-glow-orange);
        }

        .btn-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--accent-cyan);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .btn-link:hover {
            gap: 10px;
        }

        .btn-link .arrow {
            display: inline-block;
            transition: transform var(--transition-fast);
        }

        .btn-link:hover .arrow {
            transform: translateX(4px);
        }

        /* ========== METRICS DASHBOARD ========== */
        .metrics-section {
            padding: var(--section-gap) 0;
            background: var(--bg-primary);
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .metric-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
        }

        .metric-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--accent-cyan);
            opacity: 0;
            transition: opacity var(--transition-normal);
        }

        .metric-card:hover::before {
            opacity: 1;
        }

        .metric-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.08);
            transform: translateY(-4px);
        }

        .metric-value {
            font-family: var(--font-mono);
            font-size: 56px;
            font-weight: 700;
            color: var(--accent-cyan);
            line-height: 1;
            margin-bottom: 10px;
            letter-spacing: -0.03em;
        }

        .metric-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            letter-spacing: 0.02em;
        }

        .metric-sublabel {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 6px;
        }

        /* ========== FEATURES SECTION ========== */
        .features-section {
            padding: var(--section-gap) 0;
            background: var(--bg-secondary);
        }

        .features-section .section-header {
            margin-bottom: 56px;
        }

        .features-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 24px;
        }

        .feature-card-large {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 36px;
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .feature-card-large:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 32px rgba(0, 240, 255, 0.06);
            transform: translateY(-3px);
        }

        .feature-card-large .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-lg);
            background: rgba(0, 240, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--accent-cyan);
            flex-shrink: 0;
        }

        .feature-card-large h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-heading);
            letter-spacing: -0.01em;
        }

        .feature-card-large p {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.75;
        }

        .feature-card-large img {
            border-radius: var(--radius-lg);
            width: 100%;
            object-fit: cover;
            max-height: 240px;
        }

        .feature-cards-stack {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .feature-card-sm {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px;
            transition: all var(--transition-normal);
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .feature-card-sm:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 6px 20px rgba(0, 240, 255, 0.05);
            transform: translateY(-2px);
        }

        .feature-card-sm .fc-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            background: rgba(0, 240, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--accent-cyan);
            flex-shrink: 0;
        }

        .feature-card-sm .fc-content h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 6px;
        }

        .feature-card-sm .fc-content p {
            font-size: 13px;
            color: var(--text-body);
            line-height: 1.6;
        }

        /* ========== COMPARISON TABLE ========== */
        .comparison-section {
            padding: var(--section-gap) 0;
            background: var(--bg-primary);
        }

        .comparison-section .section-header {
            margin-bottom: 48px;
        }

        .comparison-wrapper {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            gap: 0;
            align-items: stretch;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            overflow: hidden;
        }

        .comparison-col {
            padding: 36px 32px;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .comparison-col.before {
            background: rgba(255, 77, 0, 0.03);
        }

        .comparison-col.after {
            background: rgba(0, 240, 255, 0.03);
        }

        .comparison-col h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-heading);
            text-align: center;
        }

        .comparison-col.before h3 {
            color: var(--accent-orange);
        }

        .comparison-col.after h3 {
            color: var(--accent-cyan);
        }

        .comparison-divider {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0 20px;
            background: var(--bg-tertiary);
            min-width: 60px;
        }

        .comparison-divider .vs-badge {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--bg-primary);
            border: 2px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 16px;
            color: var(--text-heading);
            letter-spacing: 0.04em;
            font-family: var(--font-mono);
        }

        .comparison-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            border-bottom: 1px solid var(--border-light);
            gap: 12px;
        }

        .comparison-item:last-child {
            border-bottom: none;
        }

        .comparison-item .ci-label {
            font-size: 14px;
            color: var(--text-body);
            font-weight: 500;
        }

        .comparison-item .ci-value {
            font-family: var(--font-mono);
            font-size: 16px;
            font-weight: 700;
            color: var(--text-heading);
            white-space: nowrap;
        }

        .comparison-col.after .ci-value {
            color: var(--accent-cyan);
        }

        .comparison-col.before .ci-value {
            color: var(--accent-orange);
        }

        /* ========== DATA FLOW ========== */
        .dataflow-section {
            padding: var(--section-gap) 0;
            background: var(--bg-secondary);
        }

        .dataflow-section .section-header {
            margin-bottom: 48px;
        }

        .dataflow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .dataflow-step {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 20px;
            text-align: center;
            transition: all var(--transition-normal);
            position: relative;
        }

        .dataflow-step:hover {
            border-color: var(--accent-cyan);
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.06);
        }

        .dataflow-step .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--accent-cyan);
            color: #0A0A0A;
            font-weight: 700;
            font-size: 18px;
            font-family: var(--font-mono);
            margin-bottom: 16px;
        }

        .dataflow-step h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 8px;
        }

        .dataflow-step p {
            font-size: 13px;
            color: var(--text-body);
            line-height: 1.6;
        }

        .dataflow-arrow {
            display: none;
        }

        /* ========== SCENARIOS ========== */
        .scenarios-section {
            padding: var(--section-gap) 0;
            background: var(--bg-primary);
        }

        .scenarios-section .section-header {
            margin-bottom: 48px;
        }

        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .scenario-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-normal);
        }

        .scenario-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.07);
            transform: translateY(-4px);
        }

        .scenario-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-color);
        }

        .scenario-card .sc-body {
            padding: 22px 20px;
        }

        .scenario-card .sc-body h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 8px;
        }

        .scenario-card .sc-body p {
            font-size: 13px;
            color: var(--text-body);
            line-height: 1.6;
            margin-bottom: 14px;
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: var(--section-gap) 0;
            background: var(--bg-secondary);
        }

        .faq-section .section-header {
            margin-bottom: 48px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
        }

        .faq-item {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-normal);
        }

        .faq-item:hover {
            border-color: var(--accent-cyan);
        }

        .faq-question {
            width: 100%;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            text-align: left;
            cursor: pointer;
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
        }

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 16px;
            font-weight: 700;
            color: var(--accent-cyan);
            transition: all var(--transition-normal);
            font-family: var(--font-mono);
            line-height: 1;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--accent-cyan);
            color: #0A0A0A;
            border-color: var(--accent-cyan);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.75;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: var(--section-gap) 0;
            background: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 60%;
            height: 200%;
            background: radial-gradient(ellipse at center, rgba(0, 240, 255, 0.03) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
            transition: all var(--transition-normal);
        }

        .cta-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 12px 40px rgba(0, 240, 255, 0.08);
        }

        .cta-card h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .cta-card p {
            font-size: 15px;
            color: var(--text-body);
            margin-bottom: 28px;
            line-height: 1.7;
        }

        .cta-form {
            display: flex;
            flex-direction: column;
            gap: 14px;
            max-width: 480px;
            margin: 0 auto;
        }

        .cta-form input,
        .cta-form textarea {
            width: 100%;
            padding: 14px 18px;
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            color: var(--text-heading);
            font-size: 15px;
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
        }

        .cta-form input:focus,
        .cta-form textarea:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.08);
            outline: none;
        }

        .cta-form input::placeholder,
        .cta-form textarea::placeholder {
            color: var(--text-dim);
        }

        .cta-form textarea {
            resize: vertical;
            min-height: 100px;
        }

        .cta-form .btn-primary {
            width: 100%;
            padding: 16px;
            font-size: 16px;
            letter-spacing: 0.03em;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #070707;
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .footer-col a {
            display: block;
            font-size: 13px;
            color: var(--text-muted);
            padding: 5px 0;
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            justify-content: center;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
            font-size: 12px;
            color: var(--text-dim);
        }

        .footer-bottom a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 70px;
                --site-padding: 28px;
            }
            .section-title {
                font-size: 30px;
            }
            .category-hero .hero-title {
                font-size: 40px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .metric-value {
                font-size: 44px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .comparison-wrapper {
                grid-template-columns: 1fr;
                grid-template-rows: auto auto auto;
            }
            .comparison-divider {
                padding: 16px 0;
                min-width: auto;
                flex-direction: row;
            }
            .comparison-divider .vs-badge {
                width: 40px;
                height: 40px;
                font-size: 14px;
            }
            .dataflow-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .scenarios-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .nav-links {
                gap: 2px;
            }
            .nav-links a {
                padding: 8px 10px;
                font-size: 13px;
            }
            .nav-countdown {
                font-size: 11px;
                gap: 4px;
            }
            .btn-nav-cta {
                padding: 8px 16px;
                font-size: 13px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 50px;
                --site-padding: 20px;
                --nav-height: 60px;
            }
            .section-title {
                font-size: 26px;
            }
            .category-hero {
                min-height: 55vh;
            }
            .category-hero .hero-title {
                font-size: 32px;
            }
            .category-hero .hero-subtitle {
                font-size: 15px;
            }
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .metric-value {
                font-size: 36px;
            }
            .metric-card {
                padding: 20px 16px;
            }
            .scenarios-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .dataflow-steps {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .comparison-col {
                padding: 24px 20px;
            }
            .cta-card {
                padding: 32px 20px;
            }
            .cta-card h2 {
                font-size: 26px;
            }
            .feature-card-large {
                padding: 24px;
            }
            .nav-links {
                display: none;
            }
            .nav-actions {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .site-nav.mobile-open .nav-links {
                display: flex;
                flex-direction: column;
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(10, 10, 10, 0.96);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                padding: 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-color);
                z-index: 999;
            }
            .site-nav.mobile-open .nav-links a {
                padding: 14px 16px;
                font-size: 16px;
                border-radius: var(--radius-md);
                width: 100%;
                text-align: left;
            }
            .site-nav.mobile-open .nav-actions {
                display: flex;
                flex-direction: column;
                position: fixed;
                top: calc(var(--nav-height) + 320px);
                left: 0;
                right: 0;
                padding: 20px 24px;
                background: rgba(10, 10, 10, 0.96);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                border-bottom: 1px solid var(--border-color);
                z-index: 999;
                gap: 12px;
            }
            .site-nav.mobile-open .hamburger span:nth-child(1) {
                transform: rotate(45deg) translate(5px, 5px);
            }
            .site-nav.mobile-open .hamburger span:nth-child(2) {
                opacity: 0;
            }
            .site-nav.mobile-open .hamburger span:nth-child(3) {
                transform: rotate(-45deg) translate(5px, -5px);
            }
        }

        @media (max-width: 520px) {
            .metrics-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .dataflow-steps {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .category-hero .hero-title {
                font-size: 28px;
            }
            .category-hero .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .category-hero .hero-actions .btn-primary,
            .category-hero .hero-actions .btn-outline {
                width: 100%;
                text-align: center;
            }
            .comparison-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
            }
            .scenario-card img {
                height: 140px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0A0A0A;
            --bg-secondary: #141414;
            --bg-tertiary: #1A1A1A;
            --accent-cyan: #00F0FF;
            --accent-orange: #FF4D00;
            --text-heading: #FFFFFF;
            --text-body: #B0B0B0;
            --text-muted: #707070;
            --text-dim: #555555;
            --border-color: #2A2A2A;
            --border-light: #1E1E1E;
            --radius-sm: 4px;
            --radius-md: 6px;
            --radius-lg: 8px;
            --radius-xl: 12px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.6);
            --shadow-glow-orange: 0 0 12px rgba(255, 77, 0, 0.5);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-mono: 'Space Mono', 'Inter', monospace;
            --site-padding: 5%;
            --section-gap: 120px;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
            --transition-slow: 0.6s ease;
            --nav-height: 68px;
        }

        @media (max-width: 1024px) {
            :root {
                --section-gap: 80px;
                --site-padding: 24px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 60px;
                --site-padding: 20px;
                --nav-height: 60px;
            }
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-body);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
            letter-spacing: 0.01em;
            padding-top: var(--nav-height);
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: var(--site-padding);
            padding-right: var(--site-padding);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 12px;
            position: relative;
        }

        .section-label::after {
            content: '';
            display: inline-block;
            width: 24px;
            height: 1px;
            background: var(--accent-cyan);
            margin-left: 10px;
            vertical-align: middle;
            opacity: 0.6;
        }

        .section-title {
            font-size: 36px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-body);
            max-width: 640px;
            line-height: 1.8;
        }

        /* ========== NAVIGATION ========== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 10, 10, 0.88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            transition: background var(--transition-normal);
        }

        .site-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }

        .nav-logo svg {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
        }

        .nav-logo-badge {
            display: inline-block;
            font-size: 10px;
            font-weight: 700;
            background: var(--accent-orange);
            color: #0A0A0A;
            padding: 3px 7px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.04em;
            margin-left: 4px;
            line-height: 1;
            animation: pulse-badge 2s ease-in-out infinite;
        }

        @keyframes pulse-badge {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.7;
            }
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
        }

        .nav-links a {
            display: block;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-cyan);
        }

        .nav-links a.active {
            background: rgba(0, 240, 255, 0.06);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: all var(--transition-normal);
            transform: translateX(-50%);
            border-radius: 1px;
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 60%;
        }

        .nav-hot-badge {
            display: inline-block;
            font-size: 9px;
            font-weight: 700;
            background: var(--accent-orange);
            color: #0A0A0A;
            padding: 2px 5px;
            border-radius: 3px;
            margin-left: 5px;
            letter-spacing: 0.03em;
            line-height: 1;
            vertical-align: middle;
            animation: pulse-badge 1.8s ease-in-out infinite;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .nav-countdown {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-body);
            font-family: var(--font-mono);
            letter-spacing: 0.03em;
            white-space: nowrap;
        }

        .nav-countdown-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-orange);
            display: inline-block;
            animation: pulse-dot 1.2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(255, 77, 0, 0.7);
            }
            50% {
                box-shadow: 0 0 0 8px rgba(255, 77, 0, 0);
            }
        }

        #countdownDisplay {
            color: var(--accent-orange);
            font-weight: 700;
            font-size: 14px;
        }

        .btn-nav-cta {
            background: var(--accent-cyan);
            color: #0A0A0A;
            font-weight: 600;
            padding: 10px 22px;
            border-radius: var(--radius-md);
            font-size: 14px;
            letter-spacing: 0.02em;
            transition: all var(--transition-normal);
            white-space: nowrap;
            cursor: pointer;
        }

        .btn-nav-cta:hover {
            box-shadow: var(--shadow-glow);
            transform: scale(1.03);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            z-index: 1001;
            padding: 4px;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-heading);
            border-radius: 2px;
            transition: all var(--transition-normal);
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 1024px) {
            .nav-links {
                gap: 2px;
            }
            .nav-links a {
                padding: 8px 10px;
                font-size: 13px;
            }
            .nav-actions {
                gap: 10px;
            }
            .nav-countdown {
                font-size: 11px;
            }
            #countdownDisplay {
                font-size: 12px;
            }
            .btn-nav-cta {
                padding: 8px 16px;
                font-size: 13px;
            }
        }

        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: rgba(10, 10, 10, 0.96);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 100px 30px 40px;
                gap: 8px;
                transition: right var(--transition-normal);
                border-left: 1px solid var(--border-color);
                z-index: 999;
            }
            .nav-links.open {
                right: 0;
            }
            .nav-links a {
                font-size: 16px;
                padding: 12px 16px;
                width: 100%;
                text-align: left;
            }
            .nav-actions {
                gap: 8px;
            }
            .nav-countdown {
                display: none;
            }
            .btn-nav-cta {
                padding: 8px 14px;
                font-size: 12px;
            }
            .nav-logo {
                font-size: 20px;
            }
            .nav-logo svg {
                width: 24px;
                height: 24px;
            }
            .nav-logo-badge {
                font-size: 9px;
                padding: 2px 5px;
            }
        }

        /* ========== HERO ========== */
        .page-hero {
            position: relative;
            min-height: 70vh;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            background-position: center 30%;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 10, 10, 0.75) 0%, rgba(10, 10, 10, 0.85) 60%, rgba(10, 10, 10, 0.95) 100%);
            z-index: 1;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding-top: 40px;
            padding-bottom: 40px;
        }

        .page-hero-content {
            max-width: 720px;
        }

        .page-hero-badge {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid rgba(0, 240, 255, 0.3);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 20px;
            letter-spacing: 0.04em;
        }

        .page-hero h1 {
            font-size: 52px;
            font-weight: 800;
            color: var(--text-heading);
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .page-hero h1 span {
            color: var(--accent-cyan);
        }

        .page-hero p {
            font-size: 18px;
            color: var(--text-body);
            max-width: 560px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .page-hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: var(--accent-cyan);
            color: #0A0A0A;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            font-size: 15px;
            letter-spacing: 0.02em;
            transition: all var(--transition-normal);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-glow);
            transform: scale(1.04);
        }

        .btn-outline {
            background: transparent;
            color: var(--accent-orange);
            font-weight: 600;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            font-size: 15px;
            letter-spacing: 0.02em;
            border: 1px solid var(--accent-orange);
            transition: all var(--transition-normal);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
        }

        .btn-outline:hover {
            background: var(--accent-orange);
            color: #0A0A0A;
            box-shadow: var(--shadow-glow-orange);
        }

        .hero-stats-row {
            display: flex;
            gap: 48px;
            margin-top: 40px;
            flex-wrap: wrap;
        }

        .hero-stat-item {
            display: flex;
            flex-direction: column;
        }

        .hero-stat-number {
            font-family: var(--font-mono);
            font-size: 48px;
            font-weight: 700;
            color: var(--accent-cyan);
            line-height: 1;
        }

        .hero-stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 6px;
        }

        @media (max-width: 768px) {
            .page-hero {
                min-height: auto;
                padding: 60px 0;
            }
            .page-hero h1 {
                font-size: 36px;
            }
            .page-hero p {
                font-size: 15px;
            }
            .hero-stats-row {
                gap: 24px;
            }
            .hero-stat-number {
                font-size: 36px;
            }
            .btn-primary,
            .btn-outline {
                padding: 12px 24px;
                font-size: 14px;
                width: 100%;
                justify-content: center;
            }
            .page-hero-actions {
                flex-direction: column;
                width: 100%;
            }
        }

        /* ========== SECTIONS ========== */
        section {
            padding: var(--section-gap) 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }

        .section-header .section-title {
            margin-bottom: 12px;
        }

        .section-header .section-desc {
            margin: 0 auto;
        }

        /* ========== COURSE OVERVIEW ========== */
        .course-overview-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .course-overview-image {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .course-overview-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4/3;
            border-radius: var(--radius-lg);
        }

        .course-overview-image::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-lg);
            border: 1px solid rgba(0, 240, 255, 0.2);
            pointer-events: none;
        }

        .course-overview-text h3 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .course-overview-text p {
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 16px;
            font-size: 15px;
        }

        .course-feature-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .course-feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--text-body);
            font-size: 15px;
            line-height: 1.6;
        }

        .course-feature-list li::before {
            content: '';
            display: inline-block;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-cyan);
            margin-top: 8px;
            flex-shrink: 0;
            box-shadow: 0 0 8px rgba(0, 240, 255, 0.5);
        }

        @media (max-width: 768px) {
            .course-overview-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .course-overview-text h3 {
                font-size: 24px;
            }
        }

        /* ========== COURSE CARDS ========== */
        .course-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .course-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-normal);
            cursor: pointer;
            display: flex;
            flex-direction: column;
        }

        .course-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.1);
            border-color: rgba(0, 240, 255, 0.3);
        }

        .course-card-image {
            position: relative;
            aspect-ratio: 16/10;
            overflow: hidden;
        }

        .course-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform var(--transition-slow);
        }

        .course-card:hover .course-card-image img {
            transform: scale(1.04);
        }

        .course-card-level {
            position: absolute;
            top: 12px;
            left: 12px;
            font-size: 11px;
            font-weight: 700;
            padding: 5px 10px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.04em;
            z-index: 2;
        }

        .level-beginner {
            background: #1A3A2A;
            color: #4ADE80;
            border: 1px solid rgba(74, 222, 128, 0.3);
        }

        .level-intermediate {
            background: #1A2A3A;
            color: #60A5FA;
            border: 1px solid rgba(96, 165, 250, 0.3);
        }

        .level-advanced {
            background: #3A1A2A;
            color: #F472B6;
            border: 1px solid rgba(244, 114, 182, 0.3);
        }

        .level-master {
            background: #3A2A1A;
            color: #FBBF24;
            border: 1px solid rgba(251, 191, 36, 0.3);
        }

        .course-card-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .course-card-body h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .course-card-body p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
        }

        .course-card-meta {
            display: flex;
            gap: 16px;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 14px;
            flex-wrap: wrap;
        }

        .course-card-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .course-card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition-fast);
            cursor: pointer;
        }

        .course-card-link:hover {
            gap: 10px;
        }

        .course-card-link svg {
            width: 16px;
            height: 16px;
            transition: transform var(--transition-fast);
        }

        .course-card-link:hover svg {
            transform: translateX(3px);
        }

        @media (max-width: 1024px) {
            .course-cards-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media (max-width: 768px) {
            .course-cards-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .course-card-body {
                padding: 16px 18px 20px;
            }
            .course-card-body h4 {
                font-size: 16px;
            }
        }

        /* ========== TRAINING PROCESS ========== */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            position: relative;
        }

        .process-step {
            text-align: center;
            padding: 32px 20px;
            position: relative;
            border: 1px solid var(--border-color);
            background: var(--bg-secondary);
            transition: all var(--transition-normal);
            margin-right: -1px;
        }

        .process-step:first-child {
            border-radius: var(--radius-lg) 0 0 var(--radius-lg);
        }

        .process-step:last-child {
            border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
            margin-right: 0;
        }

        .process-step:hover {
            background: var(--bg-tertiary);
            border-color: rgba(0, 240, 255, 0.4);
            z-index: 2;
        }

        .process-step-number {
            font-family: var(--font-mono);
            font-size: 48px;
            font-weight: 700;
            color: var(--accent-cyan);
            line-height: 1;
            margin-bottom: 12px;
            opacity: 0.8;
        }

        .process-step h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 8px;
        }

        .process-step p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        @media (max-width: 1024px) {
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-step:first-child {
                border-radius: var(--radius-lg) 0 0 0;
            }
            .process-step:nth-child(2) {
                border-radius: 0 var(--radius-lg) 0 0;
                margin-right: 0;
            }
            .process-step:nth-child(3) {
                border-radius: 0 0 0 var(--radius-lg);
            }
            .process-step:last-child {
                border-radius: 0 0 var(--radius-lg) 0;
            }
        }

        @media (max-width: 768px) {
            .process-steps {
                grid-template-columns: 1fr;
            }
            .process-step {
                border-radius: 0 !important;
                margin-right: 0;
                margin-bottom: -1px;
            }
            .process-step:first-child {
                border-radius: var(--radius-lg) var(--radius-lg) 0 0 !important;
            }
            .process-step:last-child {
                border-radius: 0 0 var(--radius-lg) var(--radius-lg) !important;
                margin-bottom: 0;
            }
            .process-step-number {
                font-size: 36px;
            }
        }

        /* ========== RESULTS COMPARISON ========== */
        .comparison-block {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            gap: 32px;
            align-items: center;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
        }

        .comparison-col {
            padding: 24px;
        }

        .comparison-col h4 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 20px;
            text-align: center;
        }

        .comparison-col.before h4 {
            color: var(--text-muted);
        }

        .comparison-col.after h4 {
            color: var(--accent-cyan);
        }

        .comparison-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .comparison-list li {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 14px;
            color: var(--text-body);
        }

        .comparison-list li .val {
            font-family: var(--font-mono);
            font-weight: 600;
            color: var(--text-heading);
        }

        .comparison-col.after .comparison-list li .val {
            color: var(--accent-cyan);
        }

        .comparison-vs {
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-mono);
            font-size: 28px;
            font-weight: 800;
            color: var(--accent-orange);
            width: 80px;
            height: 80px;
            border: 2px solid var(--accent-orange);
            border-radius: 50%;
            flex-shrink: 0;
            background: rgba(255, 77, 0, 0.05);
        }

        @media (max-width: 768px) {
            .comparison-block {
                grid-template-columns: 1fr;
                gap: 16px;
                padding: 28px 20px;
            }
            .comparison-vs {
                width: 56px;
                height: 56px;
                font-size: 20px;
                margin: 0 auto;
                border-radius: 50%;
            }
            .comparison-col {
                padding: 12px;
            }
        }

        /* ========== COACH HIGHLIGHT ========== */
        .coach-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .coach-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-normal);
        }

        .coach-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.08);
            border-color: rgba(0, 240, 255, 0.3);
        }

        .coach-avatar {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            margin: 0 auto 16px;
            background: var(--bg-tertiary);
            border: 2px solid var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            color: var(--accent-cyan);
            position: relative;
            overflow: hidden;
        }

        .coach-avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 50%;
        }

        .coach-card h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 4px;
        }

        .coach-card .coach-role {
            font-size: 13px;
            color: var(--accent-cyan);
            margin-bottom: 10px;
            font-weight: 500;
        }

        .coach-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        @media (max-width: 768px) {
            .coach-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-normal);
        }

        .faq-item.active {
            border-color: rgba(0, 240, 255, 0.4);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            letter-spacing: 0.01em;
            transition: color var(--transition-fast);
            user-select: none;
        }

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all var(--transition-normal);
            font-size: 16px;
            color: var(--text-muted);
            font-weight: 400;
        }

        .faq-item.active .faq-icon {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            transform: rotate(45deg);
            background: rgba(0, 240, 255, 0.06);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 14px 18px;
                font-size: 14px;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }
            .faq-answer p {
                font-size: 13px;
            }
        }

        /* ========== CTA FORM ========== */
        .cta-form-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .cta-form-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .cta-form-text h3 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .cta-form-text p {
            color: var(--text-body);
            line-height: 1.8;
            font-size: 15px;
        }

        .cta-form {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .cta-form input,
        .cta-form textarea {
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            padding: 14px 18px;
            border-radius: var(--radius-md);
            color: var(--text-heading);
            font-size: 15px;
            transition: border-color var(--transition-fast);
            width: 100%;
        }

        .cta-form input:focus,
        .cta-form textarea:focus {
            border-color: var(--accent-cyan);
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.08);
        }

        .cta-form textarea {
            resize: vertical;
            min-height: 100px;
        }

        .cta-form input::placeholder,
        .cta-form textarea::placeholder {
            color: var(--text-dim);
        }

        .btn-submit {
            background: var(--accent-cyan);
            color: #0A0A0A;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            font-size: 15px;
            letter-spacing: 0.02em;
            transition: all var(--transition-normal);
            cursor: pointer;
            width: 100%;
            text-align: center;
        }

        .btn-submit:hover {
            box-shadow: var(--shadow-glow);
            transform: scale(1.02);
        }

        @media (max-width: 768px) {
            .cta-form-wrapper {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .cta-form-text h3 {
                font-size: 26px;
            }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .footer-col a {
            display: block;
            font-size: 13px;
            color: var(--text-muted);
            padding: 5px 0;
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
            font-size: 12px;
            color: var(--text-dim);
            align-items: center;
        }

        .footer-bottom a {
            color: var(--text-dim);
            text-decoration: underline;
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        /* ========== ANIMATIONS ========== */
        .fade-up {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity var(--transition-slow), transform var(--transition-slow);
        }

        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ========== MOBILE NAV OVERLAY ========== */
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 998;
            transition: opacity var(--transition-normal);
        }

        .nav-overlay.show {
            display: block;
        }

        @media (min-width: 769px) {
            .nav-overlay {
                display: none !important;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0A0A0A;
            --bg-secondary: #141414;
            --bg-tertiary: #1A1A1A;
            --bg-card: #111111;
            --accent-cyan: #00F0FF;
            --accent-orange: #FF4D00;
            --text-heading: #FFFFFF;
            --text-body: #B0B0B0;
            --text-muted: #707070;
            --text-dim: #555555;
            --border-color: #2A2A2A;
            --border-light: #1E1E1E;
            --radius-sm: 4px;
            --radius-md: 6px;
            --radius-lg: 8px;
            --radius-xl: 12px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.6);
            --shadow-glow-orange: 0 0 12px rgba(255, 77, 0, 0.5);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-mono: 'Space Mono', 'Inter', monospace;
            --site-padding: 5%;
            --section-gap: 120px;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
            --transition-slow: 0.6s ease;
            --nav-height: 68px;
        }

        @media (max-width: 1024px) {
            :root {
                --section-gap: 80px;
                --site-padding: 24px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 60px;
                --site-padding: 20px;
                --nav-height: 60px;
            }
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-body);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
            letter-spacing: 0.01em;
            padding-top: var(--nav-height);
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: var(--site-padding);
            padding-right: var(--site-padding);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 12px;
            position: relative;
        }

        .section-label::after {
            content: '';
            display: inline-block;
            width: 24px;
            height: 1px;
            background: var(--accent-cyan);
            margin-left: 10px;
            vertical-align: middle;
            opacity: 0.6;
        }

        .section-title {
            font-size: 36px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
            line-height: 1.2;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-body);
            max-width: 640px;
            line-height: 1.8;
        }

        @keyframes pulse-badge {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.7;
            }
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes countUpGlow {
            0% {
                text-shadow: 0 0 0px rgba(0, 240, 255, 0);
            }
            50% {
                text-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
            }
            100% {
                text-shadow: 0 0 0px rgba(0, 240, 255, 0);
            }
        }

        .animate-in {
            animation: fadeInUp 0.6s ease forwards;
        }

        .animate-in-delay-1 {
            animation-delay: 0.1s;
            opacity: 0;
        }
        .animate-in-delay-2 {
            animation-delay: 0.2s;
            opacity: 0;
        }
        .animate-in-delay-3 {
            animation-delay: 0.3s;
            opacity: 0;
        }
        .animate-in-delay-4 {
            animation-delay: 0.4s;
            opacity: 0;
        }

        .section-observer {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .section-observer.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ========== NAVIGATION ========== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 10, 10, 0.88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            transition: background var(--transition-normal);
        }

        .site-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }

        .nav-logo svg {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
        }

        .nav-logo-badge {
            display: inline-block;
            font-size: 10px;
            font-weight: 700;
            background: var(--accent-orange);
            color: #0A0A0A;
            padding: 3px 7px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.04em;
            margin-left: 4px;
            line-height: 1;
            animation: pulse-badge 2s ease-in-out infinite;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
        }

        .nav-links a {
            display: block;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-cyan);
        }

        .nav-links a.active {
            background: rgba(0, 240, 255, 0.06);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: all var(--transition-normal);
            transform: translateX(-50%);
            border-radius: 1px;
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 60%;
        }

        .nav-hot-badge {
            display: inline-block;
            font-size: 9px;
            font-weight: 700;
            background: var(--accent-orange);
            color: #0A0A0A;
            padding: 2px 5px;
            border-radius: 3px;
            margin-left: 4px;
            letter-spacing: 0.04em;
            line-height: 1;
            vertical-align: middle;
            animation: pulse-badge 1.5s ease-in-out infinite;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .nav-countdown {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-muted);
            font-family: var(--font-mono);
            white-space: nowrap;
        }

        .nav-countdown-dot {
            width: 7px;
            height: 7px;
            background: var(--accent-orange);
            border-radius: 50%;
            animation: pulse-badge 1.5s ease-in-out infinite;
        }

        .nav-countdown span#countdownDisplay {
            color: var(--accent-orange);
            font-weight: 700;
            font-size: 14px;
        }

        .btn-nav-cta {
            display: inline-block;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            background: var(--accent-cyan);
            color: #0A0A0A;
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .btn-nav-cta:hover {
            background: #00e0ee;
            box-shadow: var(--shadow-glow);
            transform: scale(1.03);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            z-index: 1001;
            padding: 4px;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-heading);
            border-radius: 2px;
            transition: all var(--transition-normal);
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 1024px) {
            .nav-links {
                gap: 2px;
            }
            .nav-links a {
                padding: 8px 10px;
                font-size: 13px;
            }
            .nav-actions {
                gap: 10px;
            }
            .nav-countdown {
                font-size: 11px;
            }
            .btn-nav-cta {
                padding: 8px 16px;
                font-size: 13px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(10, 10, 10, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: center;
                justify-content: flex-start;
                padding-top: 40px;
                gap: 8px;
                transform: translateX(100%);
                transition: transform var(--transition-normal);
                z-index: 999;
            }
            .nav-links.open {
                transform: translateX(0);
            }
            .nav-links a {
                font-size: 18px;
                padding: 14px 24px;
                width: 80%;
                text-align: center;
            }
            .nav-actions {
                display: none;
            }
            .nav-actions-mobile {
                display: flex;
                flex-direction: column;
                align-items: center;
                gap: 16px;
                padding-top: 24px;
            }
            .hamburger {
                display: flex;
            }
            .nav-countdown {
                font-size: 12px;
            }
        }

        @media (min-width: 769px) {
            .nav-actions-mobile {
                display: none;
            }
        }

        /* ========== HERO - 白皮书获客风格 ========== */
        .page-hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            background-color: var(--bg-primary);
            overflow: hidden;
            padding: 60px 0;
        }

        .page-hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
            z-index: 0;
        }

        .page-hero-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(10, 10, 10, 0.9) 0%, rgba(10, 10, 10, 0.6) 50%, rgba(10, 10, 10, 0.85) 100%);
            z-index: 1;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 60px;
            align-items: center;
        }

        .hero-cover-wrap {
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .hero-cover-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-md), 0 0 40px rgba(0, 240, 255, 0.08);
            width: 100%;
            max-width: 440px;
            transition: all var(--transition-normal);
            position: relative;
        }

        .hero-cover-card:hover {
            box-shadow: var(--shadow-md), 0 0 60px rgba(0, 240, 255, 0.15);
            transform: translateY(-4px);
        }

        .hero-cover-card img {
            width: 100%;
            height: 280px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-color);
        }

        .hero-cover-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            background: var(--accent-orange);
            color: #0A0A0A;
            font-size: 12px;
            font-weight: 700;
            padding: 6px 14px;
            border-radius: var(--radius-full);
            letter-spacing: 0.04em;
            z-index: 3;
        }

        .hero-cover-info {
            padding: 20px 24px;
        }

        .hero-cover-info h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 6px;
        }

        .hero-cover-info p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .hero-content h1 {
            font-size: 52px;
            font-weight: 800;
            color: var(--text-heading);
            letter-spacing: -0.02em;
            line-height: 1.15;
            margin-bottom: 18px;
        }

        .hero-content h1 .highlight {
            color: var(--accent-cyan);
            position: relative;
        }

        .hero-content .hero-subtitle {
            font-size: 18px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 24px;
            max-width: 520px;
        }

        .hero-toc {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 20px 24px;
            margin-bottom: 28px;
        }

        .hero-toc h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 12px;
        }

        .hero-toc ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .hero-toc ul li {
            font-size: 14px;
            color: var(--text-body);
            padding-left: 20px;
            position: relative;
            line-height: 1.5;
        }

        .hero-toc ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 8px;
            width: 6px;
            height: 6px;
            background: var(--accent-cyan);
            border-radius: 50%;
        }

        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 15px;
            font-weight: 600;
            background: var(--accent-cyan);
            color: #0A0A0A;
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            letter-spacing: 0.02em;
        }

        .btn-primary:hover {
            background: #00e0ee;
            box-shadow: var(--shadow-glow);
            transform: scale(1.03);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 15px;
            font-weight: 600;
            background: transparent;
            color: var(--accent-orange);
            border: 1px solid var(--accent-orange);
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            letter-spacing: 0.02em;
        }

        .btn-secondary:hover {
            background: var(--accent-orange);
            color: #0A0A0A;
            box-shadow: var(--shadow-glow-orange);
        }

        @media (max-width: 1024px) {
            .page-hero .container {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-content h1 {
                font-size: 42px;
            }
            .hero-cover-wrap {
                order: -1;
            }
            .hero-cover-card {
                max-width: 360px;
            }
            .hero-cover-card img {
                height: 220px;
            }
        }

        @media (max-width: 768px) {
            .page-hero {
                min-height: auto;
                padding: 40px 0;
            }
            .hero-content h1 {
                font-size: 34px;
            }
            .hero-content .hero-subtitle {
                font-size: 15px;
            }
            .hero-cover-card {
                max-width: 300px;
            }
            .hero-cover-card img {
                height: 180px;
            }
            .hero-cta-group {
                flex-direction: column;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
        }

        /* ========== 指标看板 ========== */
        .stats-dashboard {
            padding: 100px 0;
            background: var(--bg-primary);
            position: relative;
        }

        .stats-dashboard::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-color), transparent);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--accent-cyan);
            opacity: 0;
            transition: opacity var(--transition-normal);
        }

        .stat-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.08);
            transform: translateY(-4px);
        }

        .stat-card:hover::before {
            opacity: 1;
        }

        .stat-number {
            font-family: var(--font-mono);
            font-size: 56px;
            font-weight: 700;
            color: var(--accent-cyan);
            line-height: 1;
            margin-bottom: 8px;
            transition: all var(--transition-normal);
        }

        .stat-card:hover .stat-number {
            animation: countUpGlow 1.5s ease-in-out;
        }

        .stat-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            margin-bottom: 4px;
        }

        .stat-desc {
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-number {
                font-size: 44px;
            }
        }

        @media (max-width: 768px) {
            .stats-dashboard {
                padding: 60px 0;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card {
                padding: 20px 16px;
            }
            .stat-number {
                font-size: 36px;
            }
            .stat-label {
                font-size: 12px;
            }
        }

        /* ========== 赛事服务矩阵 ========== */
        .services-matrix {
            padding: 100px 0;
            background: var(--bg-secondary);
            position: relative;
        }

        .services-matrix .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .services-matrix .section-header .section-label {
            display: inline-block;
        }

        .services-matrix .section-header .section-title {
            max-width: 700px;
            margin: 0 auto 16px;
        }

        .services-matrix .section-header .section-desc {
            margin: 0 auto;
        }

        .matrix-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 20px;
        }

        .matrix-card-large {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 36px;
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            min-height: 380px;
            background-image: url('/assets/images/coverpic/cover-2.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            background-color: rgba(17, 17, 17, 0.85);
        }

        .matrix-card-large:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 12px 32px rgba(0, 240, 255, 0.1);
            transform: translateY(-4px);
        }

        .matrix-card-large .card-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 700;
            background: var(--accent-cyan);
            color: #0A0A0A;
            padding: 5px 12px;
            border-radius: var(--radius-full);
            letter-spacing: 0.04em;
            margin-bottom: 16px;
            align-self: flex-start;
        }

        .matrix-card-large h3 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .matrix-card-large p {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.7;
            max-width: 500px;
        }

        .matrix-card-large .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 14px;
            margin-top: 20px;
            transition: gap var(--transition-fast);
            align-self: flex-start;
        }

        .matrix-card-large .card-link:hover {
            gap: 12px;
        }

        .matrix-card-large .card-link svg {
            width: 16px;
            height: 16px;
            transition: transform var(--transition-fast);
        }

        .matrix-card-large .card-link:hover svg {
            transform: translateX(3px);
        }

        .matrix-cards-stack {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .matrix-card-sm {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            transition: all var(--transition-normal);
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }

        .matrix-card-sm:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 6px 20px rgba(0, 240, 255, 0.06);
            transform: translateY(-3px);
        }

        .matrix-card-sm .card-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-md);
            background: rgba(0, 240, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            color: var(--accent-cyan);
            font-size: 20px;
        }

        .matrix-card-sm .card-info h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 6px;
        }

        .matrix-card-sm .card-info p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .matrix-grid {
                grid-template-columns: 1fr;
            }
            .matrix-card-large {
                min-height: 300px;
            }
        }

        @media (max-width: 768px) {
            .services-matrix {
                padding: 60px 0;
            }
            .matrix-card-large {
                padding: 24px;
                min-height: 260px;
            }
            .matrix-card-large h3 {
                font-size: 22px;
            }
            .matrix-card-sm {
                padding: 18px 20px;
                flex-direction: column;
                gap: 12px;
            }
        }

        /* ========== 热门赛事列表 ========== */
        .hot-events {
            padding: 100px 0;
            background: var(--bg-primary);
            position: relative;
        }

        .hot-events .section-header {
            margin-bottom: 50px;
        }

        .events-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .event-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-normal);
            position: relative;
        }

        .event-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.08);
            transform: translateY(-4px);
        }

        .event-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-color);
        }

        .event-card-body {
            padding: 20px;
        }

        .event-card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }

        .event-card-date {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-orange);
            font-family: var(--font-mono);
        }

        .event-card-tag {
            font-size: 11px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-cyan);
            letter-spacing: 0.03em;
        }

        .event-card h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .event-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 14px;
        }

        .event-card .card-link-sm {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition-fast);
        }

        .event-card .card-link-sm:hover {
            gap: 8px;
        }

        @media (max-width: 1024px) {
            .events-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .hot-events {
                padding: 60px 0;
            }
            .events-grid {
                grid-template-columns: 1fr;
            }
            .event-card-img {
                height: 180px;
            }
        }

        /* ========== 赛事流程 ========== */
        .event-process {
            padding: 100px 0;
            background: var(--bg-secondary);
            position: relative;
        }

        .event-process .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .event-process .section-header .section-title {
            max-width: 600px;
            margin: 0 auto 16px;
        }

        .event-process .section-header .section-desc {
            margin: 0 auto;
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .process-steps::before {
            content: '';
            position: absolute;
            top: 32px;
            left: 12%;
            right: 12%;
            height: 1px;
            background: var(--border-color);
            z-index: 0;
        }

        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .process-step-num {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-family: var(--font-mono);
            font-size: 24px;
            font-weight: 700;
            color: var(--accent-cyan);
            transition: all var(--transition-normal);
            position: relative;
        }

        .process-step:hover .process-step-num {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
            background: rgba(0, 240, 255, 0.05);
        }

        .process-step h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 6px;
        }

        .process-step p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps::before {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .event-process {
                padding: 60px 0;
            }
            .process-steps {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .process-step-num {
                width: 52px;
                height: 52px;
                font-size: 20px;
            }
        }

        /* ========== 结果对比 ========== */
        .compare-section {
            padding: 100px 0;
            background: var(--bg-primary);
            position: relative;
        }

        .compare-section .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .compare-grid {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            gap: 30px;
            align-items: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .compare-col {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 32px 28px;
        }

        .compare-col.before {
            border-left: 3px solid var(--text-dim);
        }

        .compare-col.after {
            border-left: 3px solid var(--accent-cyan);
        }

        .compare-col h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 20px;
            text-align: center;
        }

        .compare-col.after h4 {
            color: var(--accent-cyan);
        }

        .compare-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 14px;
        }

        .compare-item:last-child {
            border-bottom: none;
        }

        .compare-item .compare-val {
            font-family: var(--font-mono);
            font-weight: 700;
            font-size: 16px;
        }

        .compare-col.before .compare-val {
            color: var(--text-muted);
        }

        .compare-col.after .compare-val {
            color: var(--accent-cyan);
        }

        .compare-vs {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid var(--accent-orange);
            font-family: var(--font-mono);
            font-weight: 700;
            font-size: 18px;
            color: var(--accent-orange);
            flex-shrink: 0;
        }

        @media (max-width: 768px) {
            .compare-section {
                padding: 60px 0;
            }
            .compare-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .compare-vs {
                width: 48px;
                height: 48px;
                font-size: 15px;
                margin: 0 auto;
                transform: rotate(90deg);
            }
            .compare-col {
                padding: 24px 20px;
            }
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 100px 0;
            background: var(--bg-secondary);
            position: relative;
        }

        .faq-section .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-normal);
        }

        .faq-item:hover {
            border-color: #3A3A3A;
        }

        .faq-item.active {
            border-color: var(--accent-cyan);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            transition: color var(--transition-fast);
            gap: 16px;
            width: 100%;
            text-align: left;
            background: none;
            border: none;
            font-family: inherit;
        }

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all var(--transition-normal);
            font-size: 16px;
            color: var(--accent-cyan);
            font-weight: 700;
            line-height: 1;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            border-color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.8;
        }

        @media (max-width: 768px) {
            .faq-section {
                padding: 60px 0;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-answer {
                padding: 0 18px;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ========== CTA 转化表单 ========== */
        .cta-form-section {
            padding: 100px 0;
            background: var(--bg-primary);
            position: relative;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            background-color: rgba(10, 10, 10, 0.9);
        }

        .cta-form-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-form-wrap {
            max-width: 560px;
            margin: 0 auto;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 40px;
            box-shadow: var(--shadow-md);
        }

        .cta-form-wrap h3 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 8px;
            text-align: center;
        }

        .cta-form-wrap .cta-subtitle {
            font-size: 14px;
            color: var(--text-muted);
            text-align: center;
            margin-bottom: 28px;
            line-height: 1.6;
        }

        .form-group {
            margin-bottom: 18px;
        }

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-body);
            margin-bottom: 6px;
            letter-spacing: 0.02em;
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 13px 16px;
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            color: var(--text-heading);
            font-size: 15px;
            transition: all var(--transition-fast);
            font-family: var(--font-sans);
        }

        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.06);
            outline: none;
        }

        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }

        .btn-submit {
            width: 100%;
            padding: 15px 32px;
            font-size: 16px;
            font-weight: 600;
            background: var(--accent-cyan);
            color: #0A0A0A;
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            letter-spacing: 0.02em;
            cursor: pointer;
        }

        .btn-submit:hover {
            background: #00e0ee;
            box-shadow: var(--shadow-glow);
            transform: scale(1.02);
        }

        @media (max-width: 768px) {
            .cta-form-section {
                padding: 60px 0;
            }
            .cta-form-wrap {
                padding: 28px 20px;
            }
            .cta-form-wrap h3 {
                font-size: 24px;
            }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #080808;
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .footer-col a {
            display: block;
            font-size: 13px;
            color: var(--text-muted);
            padding: 5px 0;
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            font-size: 12px;
            color: var(--text-dim);
            justify-content: center;
            text-align: center;
        }

        .footer-bottom a {
            color: var(--text-dim);
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            .site-footer {
                padding: 40px 0 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 6px;
                font-size: 11px;
            }
        }

/* roulang page: category5 */
:root {
            --bg-primary: #0A0A0A;
            --bg-secondary: #141414;
            --bg-tertiary: #1A1A1A;
            --accent-cyan: #00F0FF;
            --accent-orange: #FF4D00;
            --text-heading: #FFFFFF;
            --text-body: #B0B0B0;
            --text-muted: #707070;
            --text-dim: #555555;
            --border-color: #2A2A2A;
            --border-light: #1E1E1E;
            --radius-sm: 4px;
            --radius-md: 6px;
            --radius-lg: 8px;
            --radius-xl: 12px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.6);
            --shadow-glow-orange: 0 0 12px rgba(255, 77, 0, 0.5);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-mono: 'Space Mono', 'Inter', monospace;
            --site-padding: 5%;
            --section-gap: 120px;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
            --transition-slow: 0.6s ease;
            --nav-height: 68px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-body);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
            letter-spacing: 0.01em;
            padding-top: var(--nav-height);
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: var(--site-padding);
            padding-right: var(--site-padding);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 12px;
            position: relative;
        }

        .section-label::after {
            content: '';
            display: inline-block;
            width: 24px;
            height: 1px;
            background: var(--accent-cyan);
            margin-left: 10px;
            vertical-align: middle;
            opacity: 0.6;
        }

        .section-title {
            font-size: 36px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
            line-height: 1.25;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-body);
            max-width: 640px;
            line-height: 1.8;
        }

        /* ========== NAVIGATION ========== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 10, 10, 0.88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            transition: background var(--transition-normal);
        }

        .site-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 16px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }

        .nav-logo svg {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
        }

        .nav-logo-badge {
            display: inline-block;
            font-size: 10px;
            font-weight: 700;
            background: var(--accent-orange);
            color: #0A0A0A;
            padding: 3px 7px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.04em;
            margin-left: 4px;
            line-height: 1;
            animation: pulse-badge 2s ease-in-out infinite;
        }

        @keyframes pulse-badge {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.7;
            }
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
        }

        .nav-links a {
            display: block;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-cyan);
        }

        .nav-links a.active {
            background: rgba(0, 240, 255, 0.06);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: all var(--transition-normal);
            transform: translateX(-50%);
            border-radius: 1px;
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 60%;
        }

        .nav-hot-badge {
            display: inline-block;
            font-size: 9px;
            font-weight: 700;
            background: var(--accent-orange);
            color: #0A0A0A;
            padding: 2px 5px;
            border-radius: 3px;
            margin-left: 5px;
            letter-spacing: 0.03em;
            line-height: 1;
            vertical-align: middle;
            animation: pulse-badge 1.5s ease-in-out infinite;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .nav-countdown {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-body);
            font-family: var(--font-mono);
            letter-spacing: 0.02em;
        }

        .nav-countdown-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--accent-orange);
            animation: pulse-dot 1.2s ease-in-out infinite;
            flex-shrink: 0;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(255, 77, 0, 0.7);
            }
            50% {
                box-shadow: 0 0 0 8px rgba(255, 77, 0, 0);
            }
        }

        .btn-nav-cta {
            display: inline-block;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            background: var(--accent-cyan);
            color: #0A0A0A;
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .btn-nav-cta:hover {
            box-shadow: var(--shadow-glow);
            transform: scale(1.04);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            z-index: 1001;
            padding: 6px;
            flex-shrink: 0;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-heading);
            border-radius: 2px;
            transition: all var(--transition-normal);
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ========== HERO ========== */
        .hero-category {
            position: relative;
            min-height: 70vh;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
            overflow: hidden;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 10, 10, 0.82) 0%, rgba(10, 10, 10, 0.6) 40%, rgba(10, 10, 10, 0.88) 100%);
            z-index: 1;
        }

        .hero-category .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            padding-top: 40px;
            padding-bottom: 40px;
        }

        .hero-cat-content {
            max-width: 600px;
        }

        .hero-cat-badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 240, 255, 0.35);
            padding: 6px 14px;
            border-radius: var(--radius-full);
            letter-spacing: 0.06em;
            margin-bottom: 20px;
            background: rgba(0, 240, 255, 0.05);
        }

        .hero-cat-content h1 {
            font-size: 52px;
            font-weight: 800;
            color: var(--text-heading);
            letter-spacing: -0.02em;
            line-height: 1.15;
            margin-bottom: 20px;
        }

        .hero-cat-content h1 span {
            color: var(--accent-cyan);
        }

        .hero-cat-desc {
            font-size: 17px;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 520px;
        }

        .hero-cat-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }

        .hero-cat-stat-item {
            display: flex;
            flex-direction: column;
        }

        .hero-cat-stat-num {
            font-size: 36px;
            font-weight: 700;
            font-family: var(--font-mono);
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
        }

        .hero-cat-stat-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 2px;
        }

        .hero-cat-btns {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-block;
            padding: 14px 32px;
            font-size: 15px;
            font-weight: 600;
            background: var(--accent-cyan);
            color: #0A0A0A;
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            letter-spacing: 0.02em;
            text-align: center;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-glow);
            transform: scale(1.04);
        }

        .btn-outline {
            display: inline-block;
            padding: 14px 32px;
            font-size: 15px;
            font-weight: 600;
            background: transparent;
            color: var(--accent-orange);
            border: 1px solid var(--accent-orange);
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            letter-spacing: 0.02em;
            text-align: center;
        }

        .btn-outline:hover {
            background: var(--accent-orange);
            color: #0A0A0A;
            box-shadow: var(--shadow-glow-orange);
        }

        .hero-cat-visual {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        .hero-cat-visual img {
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
            max-width: 100%;
            height: auto;
        }

        .hero-cat-visual-glow {
            position: absolute;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.18) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: var(--section-gap) 0;
        }

        .section-dark {
            background: var(--bg-secondary);
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-header .section-title {
            font-size: 36px;
        }

        .section-header .section-desc {
            margin: 0 auto;
        }

        /* ========== METRICS BOARD ========== */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .metric-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
        }

        .metric-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.08);
            transform: translateY(-4px);
        }

        .metric-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--accent-cyan);
            opacity: 0;
            transition: opacity var(--transition-normal);
        }

        .metric-card:hover::before {
            opacity: 1;
        }

        .metric-icon {
            font-size: 28px;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }

        .metric-number {
            font-size: 48px;
            font-weight: 700;
            font-family: var(--font-mono);
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
            line-height: 1;
            margin-bottom: 8px;
        }

        .metric-label {
            font-size: 14px;
            color: var(--text-body);
            font-weight: 500;
        }

        .metric-trend {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 8px;
            border-radius: var(--radius-sm);
            margin-top: 8px;
        }

        .metric-trend.up {
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
        }

        .metric-trend.down {
            background: rgba(255, 77, 0, 0.1);
            color: var(--accent-orange);
        }

        /* ========== SERVICE MATRIX ========== */
        .service-matrix {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 24px;
        }

        .service-card-large {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px;
            transition: all var(--transition-normal);
            display: flex;
            flex-direction: column;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        .service-card-large:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.08);
            transform: translateY(-4px);
        }

        .service-card-large .service-icon {
            font-size: 36px;
            color: var(--accent-cyan);
            margin-bottom: 16px;
        }

        .service-card-large h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
        }

        .service-card-large p {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .service-card-large img {
            border-radius: var(--radius-md);
            margin-top: 16px;
            width: 100%;
            object-fit: cover;
            max-height: 240px;
            border: 1px solid var(--border-color);
        }

        .service-cards-stack {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .service-card-sm {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px;
            transition: all var(--transition-normal);
            flex: 1;
        }

        .service-card-sm:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.08);
            transform: translateY(-4px);
        }

        .service-card-sm h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 8px;
        }

        .service-card-sm p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
        }

        .link-arrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            transition: all var(--transition-fast);
            margin-top: 10px;
        }

        .link-arrow:hover {
            gap: 12px;
        }

        .link-arrow svg {
            width: 16px;
            height: 16px;
            transition: transform var(--transition-fast);
        }

        .link-arrow:hover svg {
            transform: translateX(4px);
        }

        /* ========== FEATURE GRID ========== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: all var(--transition-normal);
            text-align: center;
        }

        .feature-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.08);
            transform: translateY(-4px);
        }

        .feature-card-icon {
            font-size: 32px;
            color: var(--accent-cyan);
            margin-bottom: 14px;
        }

        .feature-card h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 10px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
        }

        /* ========== SCENARIO SECTION ========== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }

        .scenario-item {
            display: flex;
            gap: 20px;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: all var(--transition-normal);
            align-items: flex-start;
        }

        .scenario-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.06);
            transform: translateY(-3px);
        }

        .scenario-num {
            font-size: 40px;
            font-weight: 800;
            font-family: var(--font-mono);
            color: var(--accent-cyan);
            line-height: 1;
            flex-shrink: 0;
            opacity: 0.7;
        }

        .scenario-text h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 8px;
        }

        .scenario-text p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
        }

        /* ========== DATA FLOW ========== */
        .data-flow {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            padding: 20px 0;
        }

        .data-flow-step {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            text-align: center;
            min-width: 140px;
            transition: all var(--transition-normal);
            position: relative;
        }

        .data-flow-step:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 6px 20px rgba(0, 240, 255, 0.07);
            transform: translateY(-3px);
        }

        .data-flow-step .step-num {
            font-size: 28px;
            font-weight: 800;
            font-family: var(--font-mono);
            color: var(--accent-cyan);
            margin-bottom: 6px;
        }

        .data-flow-step .step-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-heading);
        }

        .data-flow-arrow {
            font-size: 24px;
            color: var(--accent-cyan);
            flex-shrink: 0;
            opacity: 0.6;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-normal);
        }

        .faq-item.active {
            border-color: var(--accent-cyan);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            transition: all var(--transition-fast);
            gap: 12px;
            width: 100%;
            text-align: left;
        }

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-normal);
            font-size: 16px;
            color: var(--accent-cyan);
            font-weight: 700;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            border-color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }

        .faq-item.active .faq-answer {
            max-height: 400px;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.8;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .cta-info h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .cta-info p {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .cta-benefit-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .cta-benefit-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-body);
        }

        .cta-benefit-list li::before {
            content: '✓';
            color: var(--accent-cyan);
            font-weight: 700;
            font-size: 16px;
            flex-shrink: 0;
        }

        .cta-form {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 36px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .cta-form h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 4px;
            text-align: center;
        }

        .cta-form .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .cta-form label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-muted);
            letter-spacing: 0.03em;
        }

        .cta-form input,
        .cta-form textarea {
            padding: 12px 16px;
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            color: var(--text-heading);
            font-size: 15px;
            transition: border-color var(--transition-fast);
            resize: vertical;
        }

        .cta-form input:focus,
        .cta-form textarea:focus {
            border-color: var(--accent-cyan);
            outline: 1px solid rgba(0, 240, 255, 0.2);
        }

        .cta-form .btn-submit {
            padding: 14px;
            font-size: 16px;
            font-weight: 700;
            background: var(--accent-cyan);
            color: #0A0A0A;
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all var(--transition-normal);
            letter-spacing: 0.02em;
            margin-top: 4px;
            width: 100%;
            text-align: center;
        }

        .cta-form .btn-submit:hover {
            box-shadow: var(--shadow-glow);
            transform: scale(1.02);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 14px;
            letter-spacing: -0.02em;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            padding: 5px 0;
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 12px;
            color: var(--text-dim);
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
            justify-content: center;
            text-align: center;
        }

        .footer-bottom a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        /* ========== ANIMATIONS ========== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-on-scroll {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity var(--transition-slow), transform var(--transition-slow);
        }

        .animate-on-scroll.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 80px;
                --site-padding: 24px;
            }
            .section-title {
                font-size: 30px;
            }
            .hero-category .container {
                grid-template-columns: 1fr;
                gap: 40px;
                text-align: center;
            }
            .hero-cat-content {
                max-width: 100%;
            }
            .hero-cat-content h1 {
                font-size: 40px;
            }
            .hero-cat-desc {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-cat-stats {
                justify-content: center;
            }
            .hero-cat-btns {
                justify-content: center;
            }
            .hero-cat-visual {
                order: -1;
            }
            .hero-cat-visual img {
                max-width: 70%;
                margin: 0 auto;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-matrix {
                grid-template-columns: 1fr;
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .cta-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .nav-actions {
                gap: 8px;
            }
            .nav-countdown {
                font-size: 11px;
            }
            .btn-nav-cta {
                padding: 8px 16px;
                font-size: 12px;
            }
            .nav-links a {
                padding: 6px 10px;
                font-size: 12px;
            }
            .data-flow {
                gap: 12px;
            }
            .data-flow-step {
                min-width: 110px;
                padding: 18px 16px;
            }
            .data-flow-arrow {
                font-size: 18px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 60px;
                --site-padding: 20px;
                --nav-height: 60px;
            }
            .section-title {
                font-size: 26px;
            }
            .section-header {
                margin-bottom: 36px;
            }
            .hero-category {
                min-height: auto;
                padding: 60px 0;
            }
            .hero-cat-content h1 {
                font-size: 32px;
            }
            .hero-cat-desc {
                font-size: 15px;
            }
            .hero-cat-stat-num {
                font-size: 28px;
            }
            .hero-cat-visual img {
                max-width: 90%;
            }
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .metric-number {
                font-size: 36px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .scenario-item {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
            .scenario-num {
                font-size: 32px;
            }
            .data-flow {
                flex-direction: column;
                gap: 8px;
            }
            .data-flow-arrow {
                transform: rotate(90deg);
                font-size: 16px;
            }
            .data-flow-step {
                min-width: auto;
                width: 100%;
                max-width: 280px;
            }
            .cta-form {
                padding: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                text-align: center;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                gap: 8px;
            }
            .nav-links {
                display: none;
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(10, 10, 10, 0.96);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px;
                gap: 4px;
                border-bottom: 1px solid var(--border-color);
                z-index: 999;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links a {
                padding: 14px 20px;
                font-size: 16px;
                width: 100%;
                text-align: center;
                border-radius: var(--radius-md);
            }
            .hamburger {
                display: flex;
            }
            .nav-actions {
                gap: 8px;
            }
            .nav-countdown {
                display: none;
            }
            .btn-nav-cta {
                padding: 8px 14px;
                font-size: 12px;
            }
            .section-desc {
                font-size: 14px;
            }
            .service-card-large {
                padding: 24px;
            }
            .service-card-large h3 {
                font-size: 20px;
            }
            .service-card-sm h4 {
                font-size: 16px;
            }
        }

        @media (max-width: 520px) {
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .hero-cat-stats {
                gap: 16px;
                justify-content: center;
            }
            .hero-cat-btns {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
                text-align: center;
            }
            .hero-cat-content h1 {
                font-size: 28px;
            }
            .cta-info h2 {
                font-size: 24px;
            }
            .nav-logo {
                font-size: 20px;
            }
            .nav-logo svg {
                width: 24px;
                height: 24px;
            }
            .nav-logo-badge {
                font-size: 8px;
                padding: 2px 5px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #0A0A0A;
            --bg-secondary: #141414;
            --bg-tertiary: #1A1A1A;
            --bg-card: #111111;
            --accent-cyan: #00F0FF;
            --accent-orange: #FF4D00;
            --accent-cyan-dim: rgba(0, 240, 255, 0.15);
            --accent-orange-dim: rgba(255, 77, 0, 0.15);
            --text-heading: #FFFFFF;
            --text-body: #B0B0B0;
            --text-muted: #707070;
            --text-dim: #555555;
            --border-color: #2A2A2A;
            --border-light: #1E1E1E;
            --radius-sm: 4px;
            --radius-md: 6px;
            --radius-lg: 8px;
            --radius-xl: 12px;
            --radius-2xl: 16px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.6);
            --shadow-glow-strong: 0 0 28px rgba(0, 240, 255, 0.75);
            --shadow-glow-orange: 0 0 12px rgba(255, 77, 0, 0.5);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-mono: 'Space Mono', 'Inter', monospace;
            --site-padding: 5%;
            --section-gap: 100px;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
            --transition-slow: 0.6s ease;
            --nav-height: 68px;
        }

        @media (max-width: 1024px) {
            :root {
                --section-gap: 70px;
                --site-padding: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 50px;
                --site-padding: 20px;
                --nav-height: 60px;
            }
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-body);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
            letter-spacing: 0.01em;
            padding-top: var(--nav-height);
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: var(--site-padding);
            padding-right: var(--site-padding);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 12px;
            position: relative;
        }

        .section-label::after {
            content: '';
            display: inline-block;
            width: 24px;
            height: 1px;
            background: var(--accent-cyan);
            margin-left: 10px;
            vertical-align: middle;
            opacity: 0.6;
        }

        .section-title {
            font-size: 36px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
            line-height: 1.25;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-body);
            max-width: 640px;
            line-height: 1.8;
        }

        @keyframes pulse-badge {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.7;
            }
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes countUpGlow {
            0% {
                text-shadow: 0 0 0px var(--accent-cyan);
            }
            50% {
                text-shadow: 0 0 18px var(--accent-cyan);
            }
            100% {
                text-shadow: 0 0 4px var(--accent-cyan);
            }
        }

        @keyframes arrowBounce {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(8px);
            }
        }

        @keyframes shimmer {
            0% {
                background-position: -200% 0;
            }
            100% {
                background-position: 200% 0;
            }
        }

        .fade-in-up {
            animation: fadeInUp var(--transition-slow) ease forwards;
            opacity: 0;
        }

        /* ========== NAVIGATION ========== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 10, 10, 0.88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            transition: background var(--transition-normal);
        }

        .site-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }

        .nav-logo svg {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
        }

        .nav-logo-badge {
            display: inline-block;
            font-size: 10px;
            font-weight: 700;
            background: var(--accent-orange);
            color: #0A0A0A;
            padding: 3px 7px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.04em;
            margin-left: 4px;
            line-height: 1;
            animation: pulse-badge 2s ease-in-out infinite;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
        }

        .nav-links a {
            display: block;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-cyan);
        }

        .nav-links a.active {
            background: rgba(0, 240, 255, 0.06);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: all var(--transition-normal);
            border-radius: 2px;
            transform: translateX(-50%);
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 60%;
        }

        .nav-hot-badge {
            display: inline-block;
            font-size: 9px;
            font-weight: 700;
            background: var(--accent-orange);
            color: #0A0A0A;
            padding: 2px 5px;
            border-radius: 3px;
            letter-spacing: 0.04em;
            margin-left: 5px;
            line-height: 1;
            vertical-align: middle;
            animation: pulse-badge 2s ease-in-out infinite;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .nav-countdown {
            display: flex;
            align-items: center;
            gap: 7px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-muted);
            font-family: var(--font-mono);
            white-space: nowrap;
        }

        .nav-countdown-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-orange);
            animation: pulse-badge 1.5s ease-in-out infinite;
            flex-shrink: 0;
        }

        #countdownDisplay {
            color: var(--accent-orange);
            font-weight: 600;
        }

        .btn-nav-cta {
            display: inline-block;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            background: var(--accent-cyan);
            color: #0A0A0A;
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .btn-nav-cta:hover {
            box-shadow: var(--shadow-glow);
            transform: scale(1.04);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            z-index: 1001;
            padding: 8px;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-heading);
            border-radius: 2px;
            transition: all var(--transition-normal);
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 1024px) {
            .nav-links {
                gap: 0;
            }
            .nav-links a {
                padding: 8px 10px;
                font-size: 13px;
            }
            .nav-countdown {
                font-size: 11px;
            }
            .btn-nav-cta {
                padding: 8px 16px;
                font-size: 13px;
            }
            .nav-logo {
                font-size: 20px;
            }
            .nav-logo-badge {
                font-size: 9px;
                padding: 2px 5px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(10, 10, 10, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                justify-content: center;
                align-items: center;
                gap: 8px;
                transform: translateY(-100%);
                transition: transform var(--transition-normal);
                z-index: 999;
            }
            .nav-links.open {
                transform: translateY(0);
            }
            .nav-links a {
                font-size: 18px;
                padding: 14px 24px;
            }
            .nav-actions {
                gap: 8px;
            }
            .nav-countdown {
                font-size: 10px;
                gap: 4px;
            }
            .btn-nav-cta {
                padding: 7px 14px;
                font-size: 12px;
            }
            .hamburger {
                display: flex;
            }
            .nav-logo {
                font-size: 18px;
                gap: 6px;
            }
            .nav-logo svg {
                width: 22px;
                height: 22px;
            }
            .nav-logo-badge {
                font-size: 8px;
                padding: 2px 4px;
            }
        }

        @media (max-width: 520px) {
            .nav-countdown {
                display: none;
            }
            .btn-nav-cta {
                padding: 6px 12px;
                font-size: 11px;
            }
            .nav-logo {
                font-size: 16px;
            }
            .nav-logo-badge {
                display: none;
            }
        }

        /* ========== PAGE HERO ========== */
        .page-hero {
            position: relative;
            min-height: 55vh;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 10, 10, 0.75) 0%, rgba(10, 10, 10, 0.9) 100%);
            z-index: 1;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
        }

        .page-hero-content {
            display: flex;
            align-items: center;
            gap: 60px;
            flex-wrap: wrap;
        }

        .page-hero-text {
            flex: 1;
            min-width: 300px;
        }

        .page-hero-text .section-label {
            margin-bottom: 16px;
        }

        .page-hero-text h1 {
            font-size: 52px;
            font-weight: 800;
            color: var(--text-heading);
            letter-spacing: -0.02em;
            line-height: 1.15;
            margin-bottom: 20px;
        }

        .page-hero-text h1 span {
            color: var(--accent-cyan);
        }

        .page-hero-text .hero-subtitle {
            font-size: 18px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 30px;
            max-width: 520px;
        }

        .hero-stats-row {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }

        .hero-stat-item {
            text-align: left;
        }

        .hero-stat-value {
            font-family: var(--font-mono);
            font-size: 40px;
            font-weight: 700;
            color: var(--accent-cyan);
            line-height: 1;
            letter-spacing: -0.03em;
        }

        .hero-stat-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 6px;
            letter-spacing: 0.03em;
        }

        .page-hero-visual {
            flex: 1;
            min-width: 320px;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .page-hero-visual img {
            width: 100%;
            height: auto;
            display: block;
        }

        .page-hero-visual-inner {
            padding: 20px;
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .page-hero-visual-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent-orange);
            flex-shrink: 0;
            animation: pulse-badge 1.5s ease-in-out infinite;
        }

        .page-hero-visual-text {
            font-size: 13px;
            color: var(--text-muted);
            font-family: var(--font-mono);
        }

        @media (max-width: 768px) {
            .page-hero {
                min-height: auto;
                padding: 80px 0 50px;
            }
            .page-hero-content {
                flex-direction: column;
                gap: 36px;
            }
            .page-hero-text h1 {
                font-size: 36px;
            }
            .page-hero-text .hero-subtitle {
                font-size: 16px;
            }
            .hero-stat-value {
                font-size: 30px;
            }
            .page-hero-visual {
                min-width: 100%;
            }
        }

        /* ========== SECTION SPACING ========== */
        section {
            padding: var(--section-gap) 0;
        }

        section.section-dark {
            background: var(--bg-secondary);
        }

        section.section-darker {
            background: #0C0C0C;
        }

        /* ========== PLAN CARDS (优惠券墙风格) ========== */
        .plan-grid {
            display: grid;
            grid-template-columns: 1fr 1.35fr 1fr;
            gap: 24px;
            align-items: stretch;
        }

        .plan-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 32px 28px;
            transition: all var(--transition-normal);
            position: relative;
            display: flex;
            flex-direction: column;
            cursor: default;
        }

        .plan-card:hover {
            border-color: var(--border-color);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .plan-card.featured {
            border-color: var(--accent-cyan);
            background: var(--bg-tertiary);
            transform: scale(1.04);
            z-index: 2;
            box-shadow: var(--shadow-glow);
            position: relative;
        }

        .plan-card.featured::before {
            content: '热门推荐';
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--accent-cyan);
            color: #0A0A0A;
            font-size: 12px;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: var(--radius-full);
            letter-spacing: 0.04em;
            white-space: nowrap;
            z-index: 3;
        }

        .plan-card.featured:hover {
            transform: scale(1.06);
            box-shadow: var(--shadow-glow-strong);
            border-color: var(--accent-cyan);
        }

        .plan-card-header {
            text-align: center;
            margin-bottom: 20px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border-color);
        }

        .plan-card-name {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 6px;
            letter-spacing: -0.01em;
        }

        .plan-card.featured .plan-card-name {
            color: var(--accent-cyan);
        }

        .plan-card-price {
            font-family: var(--font-mono);
            font-size: 38px;
            font-weight: 700;
            color: var(--text-heading);
            letter-spacing: -0.03em;
        }

        .plan-card.featured .plan-card-price {
            color: var(--accent-cyan);
        }

        .plan-card-price-unit {
            font-size: 14px;
            font-weight: 400;
            color: var(--text-muted);
        }

        .plan-card-features {
            list-style: none;
            flex: 1;
            margin-bottom: 24px;
        }

        .plan-card-features li {
            padding: 8px 0;
            font-size: 14px;
            color: var(--text-body);
            border-bottom: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .plan-card-features li::before {
            content: '✓';
            color: var(--accent-cyan);
            font-weight: 700;
            flex-shrink: 0;
            font-size: 13px;
        }

        .plan-card.featured .plan-card-features li::before {
            color: var(--accent-cyan);
        }

        .btn-plan {
            display: block;
            width: 100%;
            text-align: center;
            padding: 14px 20px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            color: var(--text-heading);
            transition: all var(--transition-normal);
            letter-spacing: 0.02em;
            background: transparent;
        }

        .btn-plan:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: var(--shadow-glow);
        }

        .btn-plan-featured {
            background: var(--accent-cyan);
            color: #0A0A0A;
            border-color: var(--accent-cyan);
            font-weight: 700;
        }

        .btn-plan-featured:hover {
            background: #00E0EE;
            border-color: #00E0EE;
            box-shadow: var(--shadow-glow-strong);
            color: #0A0A0A;
            transform: scale(1.03);
        }

        @media (max-width: 1024px) {
            .plan-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .plan-card.featured {
                grid-column: span 2;
                transform: scale(1.02);
            }
            .plan-card.featured:hover {
                transform: scale(1.03);
            }
        }

        @media (max-width: 768px) {
            .plan-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .plan-card.featured {
                grid-column: span 1;
                transform: scale(1);
            }
            .plan-card.featured:hover {
                transform: scale(1.01);
            }
            .plan-card.featured::before {
                top: -12px;
                font-size: 11px;
                padding: 5px 14px;
            }
        }

        /* ========== SERVICE CARDS ========== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
        }

        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(0, 240, 255, 0.3);
        }

        .service-card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            background: var(--accent-cyan-dim);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            font-size: 22px;
            color: var(--accent-cyan);
        }

        .service-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }

        .service-card p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .service-card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition-fast);
        }

        .service-card-link:hover {
            gap: 10px;
            color: #00E0EE;
        }

        .service-card-link svg {
            width: 14px;
            height: 14px;
            transition: transform var(--transition-fast);
        }

        .service-card-link:hover svg {
            transform: translateX(3px);
        }

        @media (max-width: 1024px) {
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .service-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== TECH SPECS ========== */
        .tech-specs-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .tech-spec-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px 20px;
            text-align: center;
            transition: all var(--transition-normal);
        }

        .tech-spec-card:hover {
            border-color: rgba(0, 240, 255, 0.3);
            box-shadow: var(--shadow-sm);
        }

        .tech-spec-value {
            font-family: var(--font-mono);
            font-size: 36px;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: -0.03em;
            margin-bottom: 6px;
        }

        .tech-spec-label {
            font-size: 13px;
            color: var(--text-muted);
            letter-spacing: 0.03em;
        }

        @media (max-width: 1024px) {
            .tech-specs-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .tech-specs-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .tech-spec-value {
                font-size: 28px;
            }
            .tech-spec-card {
                padding: 16px 12px;
            }
        }

        /* ========== SCENARIO CARDS ========== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .scenario-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            overflow: hidden;
            transition: all var(--transition-normal);
            display: flex;
            flex-direction: column;
        }

        .scenario-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(0, 240, 255, 0.25);
        }

        .scenario-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }

        .scenario-card-body {
            padding: 22px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .scenario-card-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .scenario-card-body p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            flex: 1;
        }

        .scenario-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: var(--radius-full);
            background: var(--accent-orange-dim);
            color: var(--accent-orange);
            letter-spacing: 0.04em;
            margin-top: 12px;
            align-self: flex-start;
        }

        @media (max-width: 768px) {
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .scenario-card-img {
                height: 160px;
            }
        }

        /* ========== DATA HIGHLIGHTS ========== */
        .data-highlights-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .data-highlight-item {
            text-align: center;
            padding: 30px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            transition: all var(--transition-normal);
        }

        .data-highlight-item:hover {
            border-color: rgba(0, 240, 255, 0.3);
            box-shadow: var(--shadow-sm);
        }

        .data-highlight-number {
            font-family: var(--font-mono);
            font-size: 48px;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: -0.03em;
            line-height: 1;
            margin-bottom: 8px;
        }

        .data-highlight-desc {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.5;
        }

        @media (max-width: 1024px) {
            .data-highlights-row {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .data-highlights-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .data-highlight-number {
                font-size: 34px;
            }
            .data-highlight-item {
                padding: 20px 14px;
            }
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-normal);
        }

        .faq-item:hover {
            border-color: rgba(0, 240, 255, 0.2);
        }

        .faq-question {
            width: 100%;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            letter-spacing: 0.01em;
            transition: all var(--transition-fast);
            text-align: left;
            cursor: pointer;
        }

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-icon {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            transition: transform var(--transition-normal);
            position: relative;
            color: var(--text-muted);
        }

        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            background: currentColor;
            border-radius: 2px;
            transition: all var(--transition-normal);
        }

        .faq-icon::before {
            width: 14px;
            height: 2px;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
        }

        .faq-icon::after {
            width: 2px;
            height: 14px;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
        }

        .faq-item.open .faq-icon::after {
            transform: translate(-50%, -50%) rotate(90deg);
            opacity: 0;
        }

        .faq-item.open .faq-icon {
            color: var(--accent-cyan);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.75;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-answer-inner {
                padding: 0 18px 16px;
                font-size: 13px;
            }
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: var(--bg-secondary);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-form-wrapper {
            max-width: 600px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 40px 36px;
        }

        .cta-form-wrapper h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-heading);
            text-align: center;
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .cta-form-wrapper .cta-subtitle {
            text-align: center;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 28px;
        }

        .form-group {
            margin-bottom: 18px;
        }

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-body);
            margin-bottom: 6px;
            letter-spacing: 0.02em;
        }

        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 13px 16px;
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            font-size: 15px;
            color: var(--text-heading);
            transition: all var(--transition-fast);
            resize: vertical;
        }

        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.08);
            outline: none;
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: var(--text-dim);
        }

        .btn-submit {
            display: block;
            width: 100%;
            padding: 15px 24px;
            font-size: 16px;
            font-weight: 700;
            background: var(--accent-cyan);
            color: #0A0A0A;
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            letter-spacing: 0.03em;
            margin-top: 8px;
        }

        .btn-submit:hover {
            box-shadow: var(--shadow-glow-strong);
            background: #00E0EE;
            transform: scale(1.02);
        }

        @media (max-width: 768px) {
            .cta-form-wrapper {
                padding: 28px 20px;
                border-radius: var(--radius-lg);
            }
            .cta-form-wrapper h2 {
                font-size: 24px;
            }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #080808;
            border-top: 1px solid var(--border-color);
            padding: 50px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .footer-col a {
            display: block;
            font-size: 13px;
            color: var(--text-muted);
            padding: 5px 0;
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 12px;
            color: var(--text-dim);
            justify-content: center;
            text-align: center;
        }

        .footer-bottom a {
            color: var(--text-dim);
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: span 2;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .footer-brand {
                grid-column: span 1;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 6px;
                align-items: center;
            }
        }

        /* ========== UTILITY ========== */
        .text-center {
            text-align: center;
        }
        .text-cyan {
            color: var(--accent-cyan);
        }
        .text-orange {
            color: var(--accent-orange);
        }
        .mb-40 {
            margin-bottom: 40px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .mt-20 {
            margin-top: 20px;
        }

        /* ========== SCROLL REVEAL ========== */
        .reveal {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: category6 */
:root {
            --bg-primary: #0A0A0A;
            --bg-secondary: #141414;
            --bg-tertiary: #1A1A1A;
            --accent-cyan: #00F0FF;
            --accent-orange: #FF4D00;
            --text-heading: #FFFFFF;
            --text-body: #B0B0B0;
            --text-muted: #707070;
            --text-dim: #555555;
            --border-color: #2A2A2A;
            --border-light: #1E1E1E;
            --radius-sm: 4px;
            --radius-md: 6px;
            --radius-lg: 8px;
            --radius-xl: 12px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.6);
            --shadow-glow-orange: 0 0 12px rgba(255, 77, 0, 0.5);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-mono: 'Space Mono', 'Inter', monospace;
            --site-padding: 5%;
            --section-gap: 120px;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
            --transition-slow: 0.6s ease;
            --nav-height: 68px;
        }

        @media (max-width: 1024px) {
            :root {
                --section-gap: 80px;
                --site-padding: 24px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 60px;
                --site-padding: 20px;
                --nav-height: 60px;
            }
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-body);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
            letter-spacing: 0.01em;
            padding-top: var(--nav-height);
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: var(--site-padding);
            padding-right: var(--site-padding);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 12px;
            position: relative;
        }

        .section-label::after {
            content: '';
            display: inline-block;
            width: 24px;
            height: 1px;
            background: var(--accent-cyan);
            margin-left: 10px;
            vertical-align: middle;
            opacity: 0.6;
        }

        .section-title {
            font-size: 36px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
            line-height: 1.25;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-body);
            max-width: 640px;
            line-height: 1.8;
        }

        /* ========== NAVIGATION ========== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 10, 10, 0.88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            transition: background var(--transition-normal);
        }

        .site-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 16px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
            flex-shrink: 0;
            white-space: nowrap;
        }

        .nav-logo svg {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
        }

        .nav-logo-badge {
            display: inline-block;
            font-size: 10px;
            font-weight: 700;
            background: var(--accent-orange);
            color: #0A0A0A;
            padding: 3px 7px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.04em;
            margin-left: 2px;
            line-height: 1;
            animation: pulse-badge 2s ease-in-out infinite;
        }

        @keyframes pulse-badge {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.7;
            }
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
        }

        .nav-links a {
            display: block;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-cyan);
        }

        .nav-links a.active {
            background: rgba(0, 240, 255, 0.06);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: all var(--transition-normal);
            transform: translateX(-50%);
            border-radius: 1px;
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 60%;
        }

        .nav-hot-badge {
            display: inline-block;
            font-size: 9px;
            font-weight: 700;
            background: var(--accent-orange);
            color: #0A0A0A;
            padding: 1px 5px;
            border-radius: 3px;
            margin-left: 4px;
            line-height: 1.3;
            vertical-align: middle;
            letter-spacing: 0.03em;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .nav-countdown {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-muted);
            white-space: nowrap;
        }

        .nav-countdown-dot {
            display: inline-block;
            width: 7px;
            height: 7px;
            background: var(--accent-orange);
            border-radius: 50%;
            animation: pulse-dot 1.5s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(255, 77, 0, 0.6);
            }
            50% {
                box-shadow: 0 0 0 8px rgba(255, 77, 0, 0);
            }
        }

        #countdownDisplay {
            font-family: var(--font-mono);
            color: var(--accent-orange);
            font-weight: 600;
            letter-spacing: 0.04em;
        }

        .btn-nav-cta {
            display: inline-block;
            background: var(--accent-cyan);
            color: #0A0A0A;
            font-weight: 600;
            padding: 10px 22px;
            border-radius: var(--radius-md);
            font-size: 14px;
            letter-spacing: 0.02em;
            transition: all var(--transition-normal);
            white-space: nowrap;
            cursor: pointer;
        }

        .btn-nav-cta:hover {
            box-shadow: var(--shadow-glow);
            transform: scale(1.03);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            z-index: 1001;
            padding: 4px;
            flex-shrink: 0;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-heading);
            border-radius: 2px;
            transition: all var(--transition-normal);
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 1024px) {
            .nav-links {
                gap: 2px;
            }
            .nav-links a {
                padding: 8px 10px;
                font-size: 13px;
            }
            .nav-countdown {
                font-size: 11px;
            }
            .btn-nav-cta {
                padding: 8px 16px;
                font-size: 13px;
            }
            .nav-logo {
                font-size: 20px;
            }
            .nav-logo svg {
                width: 24px;
                height: 24px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(10, 10, 10, 0.96);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 24px 20px;
                gap: 4px;
                transform: translateY(-120%);
                transition: transform var(--transition-normal);
                border-bottom: 1px solid var(--border-color);
                z-index: 999;
            }
            .nav-links.open {
                transform: translateY(0);
            }
            .nav-links a {
                padding: 14px 16px;
                font-size: 16px;
                width: 100%;
                text-align: center;
                border-radius: var(--radius-md);
            }
            .nav-actions {
                gap: 8px;
            }
            .nav-countdown {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .btn-nav-cta {
                padding: 8px 14px;
                font-size: 12px;
            }
        }

        /* ========== HERO - 众筹预热风格 ========== */
        .hero-section {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
            isolation: isolate;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(160deg, rgba(10, 10, 10, 0.82) 0%, rgba(10, 10, 10, 0.7) 40%, rgba(0, 0, 0, 0.88) 100%);
            z-index: 1;
        }

        .hero-section .container {
            position: relative;
            z-index: 2;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 60px;
            align-items: center;
        }

        .hero-left {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 77, 0, 0.15);
            border: 1px solid rgba(255, 77, 0, 0.35);
            padding: 8px 16px;
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-orange);
            width: fit-content;
            letter-spacing: 0.03em;
        }

        .hero-badge-dot {
            width: 8px;
            height: 8px;
            background: var(--accent-orange);
            border-radius: 50%;
            animation: pulse-dot 1.5s ease-in-out infinite;
        }

        .hero-title {
            font-size: 52px;
            font-weight: 800;
            color: var(--text-heading);
            letter-spacing: -0.02em;
            line-height: 1.15;
        }

        .hero-title .highlight {
            color: var(--accent-cyan);
            position: relative;
        }

        .hero-desc {
            font-size: 17px;
            color: var(--text-body);
            line-height: 1.8;
            max-width: 480px;
        }

        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-top: 8px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-cyan);
            color: #0A0A0A;
            font-weight: 600;
            padding: 14px 30px;
            border-radius: var(--radius-md);
            font-size: 15px;
            letter-spacing: 0.02em;
            transition: all var(--transition-normal);
            white-space: nowrap;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-glow);
            transform: scale(1.04);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            border: 1px solid var(--accent-orange);
            color: var(--accent-orange);
            font-weight: 600;
            padding: 14px 30px;
            border-radius: var(--radius-md);
            font-size: 15px;
            letter-spacing: 0.02em;
            transition: all var(--transition-normal);
            white-space: nowrap;
        }

        .btn-secondary:hover {
            background: var(--accent-orange);
            color: #0A0A0A;
            box-shadow: var(--shadow-glow-orange);
        }

        .hero-right {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 28px;
        }

        .progress-ring-wrapper {
            position: relative;
            width: 220px;
            height: 220px;
            flex-shrink: 0;
        }

        .progress-ring {
            transform: rotate(-90deg);
            width: 220px;
            height: 220px;
        }

        .progress-ring-bg {
            fill: none;
            stroke: var(--border-color);
            stroke-width: 10;
        }

        .progress-ring-fill {
            fill: none;
            stroke: var(--accent-cyan);
            stroke-width: 10;
            stroke-linecap: round;
            stroke-dasharray: 628.32;
            stroke-dashoffset: 628.32;
            animation: fill-progress 2s ease-out 0.3s forwards;
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.5));
        }

        @keyframes fill-progress {
            to {
                stroke-dashoffset: 135.7;
            }
        }

        .progress-ring-center {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            text-align: center;
        }

        .progress-percent {
            font-family: var(--font-mono);
            font-size: 48px;
            font-weight: 700;
            color: var(--accent-cyan);
            line-height: 1;
            letter-spacing: -0.02em;
        }

        .progress-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
            letter-spacing: 0.04em;
        }

        .hero-tier-preview {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 12px;
            width: 100%;
            max-width: 440px;
        }

        .tier-card-mini {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 14px 10px;
            text-align: center;
            transition: all var(--transition-normal);
            cursor: default;
        }

        .tier-card-mini:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.08);
            transform: translateY(-3px);
        }

        .tier-card-mini.featured {
            border-color: var(--accent-orange);
            background: rgba(255, 77, 0, 0.06);
            position: relative;
        }

        .tier-card-mini.featured::after {
            content: '热门';
            position: absolute;
            top: -8px;
            right: -4px;
            font-size: 9px;
            font-weight: 700;
            background: var(--accent-orange);
            color: #0A0A0A;
            padding: 3px 7px;
            border-radius: 3px;
            letter-spacing: 0.04em;
        }

        .tier-icon {
            font-size: 26px;
            margin-bottom: 6px;
            display: block;
        }

        .tier-name {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 3px;
        }

        .tier-desc-mini {
            font-size: 11px;
            color: var(--text-muted);
            line-height: 1.4;
        }

        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
                text-align: center;
            }
            .hero-left {
                align-items: center;
            }
            .hero-desc {
                max-width: 100%;
            }
            .hero-cta-group {
                justify-content: center;
            }
            .hero-title {
                font-size: 40px;
            }
            .hero-right {
                flex-direction: column;
                align-items: center;
            }
            .hero-tier-preview {
                max-width: 100%;
            }
            .hero-section {
                min-height: auto;
                padding: 80px 0 60px;
            }
        }

        @media (max-width: 768px) {
            .hero-title {
                font-size: 32px;
            }
            .hero-desc {
                font-size: 15px;
            }
            .hero-tier-preview {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }
            .progress-ring-wrapper {
                width: 160px;
                height: 160px;
            }
            .progress-ring {
                width: 160px;
                height: 160px;
            }
            .progress-ring-fill {
                stroke-dasharray: 452.39;
                stroke-dashoffset: 452.39;
            }
            @keyframes fill-progress-mobile {
                to {
                    stroke-dashoffset: 97.7;
                }
            }
            .progress-ring-fill {
                animation: fill-progress-mobile 2s ease-out 0.3s forwards;
            }
            .progress-percent {
                font-size: 36px;
            }
            .btn-primary,
            .btn-secondary {
                padding: 12px 22px;
                font-size: 14px;
            }
            .hero-section {
                padding: 60px 0 50px;
                min-height: auto;
            }
        }

        /* ========== STATS BAR ========== */
        .stats-bar {
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-color);
            padding: 32px 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .stat-item {
            padding: 16px;
        }

        .stat-number {
            font-family: var(--font-mono);
            font-size: 42px;
            font-weight: 700;
            color: var(--accent-cyan);
            line-height: 1;
            letter-spacing: -0.02em;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 8px;
            letter-spacing: 0.03em;
        }

        .stat-divider {
            width: 1px;
            background: var(--border-color);
            height: 50px;
            align-self: center;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-number {
                font-size: 32px;
            }
            .stat-label {
                font-size: 12px;
            }
            .stat-divider {
                display: none;
            }
        }

        /* ========== TOPICS SECTION ========== */
        .topics-section {
            padding: var(--section-gap) 0;
        }

        .topics-header {
            margin-bottom: 48px;
        }

        .topics-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 24px;
        }

        .topic-card-large {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            overflow: hidden;
            transition: all var(--transition-normal);
            display: flex;
            flex-direction: column;
        }

        .topic-card-large:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 24px rgba(0, 240, 255, 0.06);
            transform: translateY(-4px);
        }

        .topic-card-img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            display: block;
        }

        .topic-card-body {
            padding: 20px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .topic-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            width: fit-content;
            letter-spacing: 0.04em;
        }

        .topic-tag.orange {
            background: rgba(255, 77, 0, 0.12);
            color: var(--accent-orange);
        }

        .topic-card-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.35;
        }

        .topic-card-desc {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
        }

        .topic-card-meta {
            display: flex;
            gap: 16px;
            font-size: 12px;
            color: var(--text-muted);
            margin-top: auto;
        }

        .topic-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            transition: all var(--transition-fast);
            margin-top: 4px;
            width: fit-content;
        }

        .topic-card-link:hover {
            gap: 10px;
            color: #00e0ee;
        }

        .topic-card-link .arrow {
            transition: transform var(--transition-fast);
        }

        .topic-card-link:hover .arrow {
            transform: translateX(4px);
        }

        .topics-sidebar {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .topic-card-compact {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 16px 20px;
            transition: all var(--transition-normal);
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }

        .topic-card-compact:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.04);
            transform: translateX(3px);
        }

        .topic-compact-img {
            width: 72px;
            height: 72px;
            border-radius: var(--radius-md);
            object-fit: cover;
            flex-shrink: 0;
        }

        .topic-compact-info {
            flex: 1;
            min-width: 0;
        }

        .topic-compact-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-heading);
            line-height: 1.4;
            margin-bottom: 4px;
        }

        .topic-compact-meta {
            font-size: 12px;
            color: var(--text-muted);
        }

        @media (max-width: 1024px) {
            .topics-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .topics-sidebar {
                flex-direction: row;
                flex-wrap: wrap;
                gap: 12px;
            }
            .topic-card-compact {
                flex: 1 1 calc(50% - 6px);
                min-width: 240px;
            }
        }

        @media (max-width: 768px) {
            .topics-sidebar {
                flex-direction: column;
            }
            .topic-card-compact {
                flex: 1 1 100%;
            }
            .topic-card-img {
                height: 160px;
            }
            .topic-card-title {
                font-size: 17px;
            }
        }

        /* ========== TIER DETAIL SECTION ========== */
        .tier-section {
            padding: var(--section-gap) 0;
            background: var(--bg-secondary);
        }

        .tier-header {
            margin-bottom: 48px;
        }

        .tier-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .tier-card {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 28px 20px;
            text-align: center;
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
        }

        .tier-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent-cyan);
        }

        .tier-card.premium {
            border-color: var(--accent-orange);
            box-shadow: 0 0 30px rgba(255, 77, 0, 0.08);
        }

        .tier-card.premium::before {
            content: '';
            position: absolute;
            top: -20px;
            right: -20px;
            width: 60px;
            height: 60px;
            background: var(--accent-orange);
            border-radius: 50%;
            opacity: 0.06;
        }

        .tier-badge-top {
            display: inline-block;
            font-size: 10px;
            font-weight: 700;
            background: var(--accent-orange);
            color: #0A0A0A;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            letter-spacing: 0.05em;
        }

        .tier-icon-large {
            font-size: 44px;
            display: block;
            margin-bottom: 14px;
        }

        .tier-card-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 6px;
        }

        .tier-card-subtitle {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 14px;
        }

        .tier-features {
            list-style: none;
            text-align: left;
            font-size: 13px;
            color: var(--text-body);
            line-height: 2;
            margin-bottom: 16px;
        }

        .tier-features li::before {
            content: '✓ ';
            color: var(--accent-cyan);
            font-weight: 700;
        }

        .tier-contribution {
            font-family: var(--font-mono);
            font-size: 28px;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 4px;
        }

        .tier-contribution-label {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 14px;
        }

        .btn-tier {
            display: inline-block;
            padding: 10px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 14px;
            letter-spacing: 0.02em;
            transition: all var(--transition-normal);
            border: 1px solid var(--border-color);
            color: var(--text-heading);
            background: transparent;
        }

        .btn-tier:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.15);
        }

        .btn-tier.premium-btn {
            background: var(--accent-orange);
            color: #0A0A0A;
            border-color: var(--accent-orange);
        }

        .btn-tier.premium-btn:hover {
            box-shadow: var(--shadow-glow-orange);
            transform: scale(1.04);
        }

        @media (max-width: 1024px) {
            .tier-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }

        @media (max-width: 768px) {
            .tier-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .tier-card {
                padding: 22px 16px;
            }
        }

        /* ========== ACTIVITY TIMELINE ========== */
        .activity-section {
            padding: var(--section-gap) 0;
        }

        .activity-header {
            margin-bottom: 48px;
        }

        .timeline {
            position: relative;
            padding-left: 40px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 15px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--border-color);
        }

        .timeline-item {
            position: relative;
            margin-bottom: 36px;
            padding-left: 28px;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -31px;
            top: 6px;
            width: 12px;
            height: 12px;
            background: var(--accent-cyan);
            border-radius: 50%;
            border: 3px solid var(--bg-primary);
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
            z-index: 2;
        }

        .timeline-item.orange::before {
            background: var(--accent-orange);
            box-shadow: 0 0 10px rgba(255, 77, 0, 0.4);
        }

        .timeline-date {
            font-family: var(--font-mono);
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            margin-bottom: 4px;
            letter-spacing: 0.04em;
        }

        .timeline-item.orange .timeline-date {
            color: var(--accent-orange);
        }

        .timeline-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 6px;
        }

        .timeline-desc {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            max-width: 600px;
        }

        @media (max-width: 768px) {
            .timeline {
                padding-left: 28px;
            }
            .timeline::before {
                left: 10px;
            }
            .timeline-item::before {
                left: -24px;
                width: 10px;
                height: 10px;
            }
            .timeline-item {
                padding-left: 16px;
            }
            .timeline-title {
                font-size: 16px;
            }
        }

        /* ========== RECRUIT SECTION ========== */
        .recruit-section {
            padding: var(--section-gap) 0;
            background: var(--bg-secondary);
        }

        .recruit-header {
            margin-bottom: 48px;
        }

        .recruit-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .recruit-card {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 24px;
            transition: all var(--transition-normal);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .recruit-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.05);
            transform: translateY(-3px);
        }

        .recruit-card-header {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .recruit-rank-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-md);
            background: rgba(0, 240, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }

        .recruit-rank-name {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-heading);
        }

        .recruit-rank-tier {
            font-size: 12px;
            color: var(--accent-orange);
            font-weight: 600;
        }

        .recruit-desc {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
        }

        .recruit-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .recruit-tag {
            font-size: 11px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-muted);
            padding: 5px 10px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
        }

        .btn-recruit {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            transition: all var(--transition-fast);
            margin-top: auto;
            width: fit-content;
        }

        .btn-recruit:hover {
            gap: 10px;
            color: #00e0ee;
        }

        @media (max-width: 1024px) {
            .recruit-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }

        @media (max-width: 768px) {
            .recruit-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }

        /* ========== PROCESS SECTION ========== */
        .process-section {
            padding: var(--section-gap) 0;
        }

        .process-header {
            margin-bottom: 48px;
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .process-steps::before {
            content: '';
            position: absolute;
            top: 28px;
            left: 12%;
            right: 12%;
            height: 1px;
            background: var(--border-color);
            z-index: 0;
        }

        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .step-number {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--bg-secondary);
            border: 2px solid var(--border-color);
            font-family: var(--font-mono);
            font-size: 22px;
            font-weight: 700;
            color: var(--accent-cyan);
            margin: 0 auto 16px;
            transition: all var(--transition-normal);
        }

        .process-step:hover .step-number {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.25);
            background: rgba(0, 240, 255, 0.04);
        }

        .step-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 6px;
        }

        .step-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .process-steps::before {
                display: none;
            }
            .step-number {
                width: 44px;
                height: 44px;
                font-size: 18px;
            }
        }

        @media (max-width: 520px) {
            .process-steps {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: var(--section-gap) 0;
            background: var(--bg-secondary);
        }

        .faq-header {
            margin-bottom: 48px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
        }

        .faq-item {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-normal);
        }

        .faq-item:hover {
            border-color: var(--border-light);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            letter-spacing: 0.01em;
            gap: 12px;
            user-select: none;
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all var(--transition-normal);
            font-size: 16px;
            color: var(--accent-cyan);
            font-weight: 700;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: rgba(0, 240, 255, 0.18);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 22px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.8;
        }

        /* ========== CTA FORM ========== */
        .cta-form-section {
            padding: var(--section-gap) 0;
            position: relative;
            isolation: isolate;
        }

        .cta-form-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(0, 240, 255, 0.03) 0%, transparent 70%);
            z-index: 0;
            pointer-events: none;
        }

        .cta-form-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-form-wrapper {
            max-width: 600px;
            margin: 0 auto;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 44px 36px;
            text-align: center;
        }

        .cta-form-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 8px;
        }

        .cta-form-desc {
            font-size: 15px;
            color: var(--text-body);
            margin-bottom: 28px;
            line-height: 1.7;
        }

        .form-group {
            margin-bottom: 16px;
            text-align: left;
        }

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-muted);
            margin-bottom: 6px;
            letter-spacing: 0.03em;
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 14px 16px;
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            color: var(--text-heading);
            font-size: 15px;
            transition: all var(--transition-fast);
            letter-spacing: 0.02em;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.06);
            outline: none;
        }

        .form-group textarea {
            resize: vertical;
            min-height: 100px;
        }

        .btn-submit {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-cyan);
            color: #0A0A0A;
            font-weight: 600;
            padding: 14px 40px;
            border-radius: var(--radius-md);
            font-size: 16px;
            letter-spacing: 0.02em;
            transition: all var(--transition-normal);
            cursor: pointer;
            margin-top: 8px;
            width: 100%;
            justify-content: center;
        }

        .btn-submit:hover {
            box-shadow: var(--shadow-glow);
            transform: scale(1.02);
        }

        @media (max-width: 768px) {
            .cta-form-wrapper {
                padding: 28px 18px;
            }
            .cta-form-title {
                font-size: 24px;
            }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            padding: 5px 0;
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 12px;
            color: var(--text-dim);
            justify-content: center;
            text-align: center;
        }

        .footer-bottom a {
            color: var(--text-dim);
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                align-items: center;
            }
        }

        /* ========== SCROLL ANIMATION ========== */
        .reveal {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        @media (prefers-reduced-motion: reduce) {
            .reveal {
                opacity: 1;
                transform: none;
                transition: none;
            }
            .progress-ring-fill {
                animation: none;
                stroke-dashoffset: 135.7;
            }
        }

/* 移动端菜单样式 */
        .mobile-menu {
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 10, 10, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 999;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: flex-start;
            padding: 40px 24px;
            gap: 20px;
            transform: translateY(-100%);
            opacity: 0;
            transition: all 0.3s ease;
            pointer-events: none;
        }
        .mobile-menu.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu .nav-links {
            flex-direction: column;
            width: 100%;
            gap: 4px;
        }
        .mobile-menu .nav-links a {
            display: block;
            width: 100%;
            padding: 14px 20px;
            font-size: 16px;
            text-align: center;
            border-radius: var(--radius-md);
        }
        .mobile-menu .nav-actions {
            flex-direction: column;
            align-items: center;
            width: 100%;
            gap: 16px;
        }
        .mobile-menu .nav-actions .nav-countdown {
            text-align: center;
            width: 100%;
        }
        .mobile-menu .btn-nav-cta {
            width: 100%;
            max-width: 280px;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            z-index: 1001;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-heading);
            transition: all 0.3s ease;
            border-radius: 2px;
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .site-nav .nav-links,
            .site-nav .nav-actions {
                display: none;
            }
        }