/* roulang page: index */
@import url('/assets/css/vendor/9723b7396f-css2.css');

        :root {
            --bg-primary: #0A0D14;
            --bg-secondary: #131720;
            --bg-card: #1A1F2E;
            --bg-card-hover: #21283A;
            --bg-surface: rgba(26, 31, 46, 0.6);
            --accent-cyan: #00E5FF;
            --accent-blue: #0066FF;
            --accent-violet: #7B2FFF;
            --accent-pink: #FF00A8;
            --accent-gold: #FFD700;
            --accent-green: #00FF88;
            --accent-red: #FF3860;
            --text-primary: #FFFFFF;
            --text-secondary: #B0B8C8;
            --text-muted: #6B7280;
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-neon: rgba(0, 229, 255, 0.3);
            --shadow-neon: 0 0 20px rgba(0, 229, 255, 0.2), 0 0 60px rgba(0, 229, 255, 0.05);
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-elevated: 0 8px 40px rgba(0, 0, 0, 0.6);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --font-sans: 'Be Vietnam Pro', 'Inter', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }

        /* Background ambient */
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(ellipse at 20% 20%, rgba(0, 102, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 60%, rgba(123, 47, 255, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 90%, rgba(0, 229, 255, 0.04) 0%, transparent 50%);
            pointer-events: none;
            z-index: 0;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 100;
            background: rgba(10, 13, 20, 0.85);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition-smooth);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.3);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: wrap;
        }

        .nav-list a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-md);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .nav-list a:hover,
        .nav-list a.active {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }

        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .btn-login {
            padding: 8px 18px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.88rem;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-subtle);
            cursor: pointer;
            transition: var(--transition-fast);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
        }
        .btn-login:hover { background: rgba(255,255,255,0.05); border-color: rgba(255,255,255,0.15); }

        .btn-signup {
            padding: 8px 20px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.88rem;
            color: #000;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            cursor: pointer;
            transition: var(--transition-fast);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
        }
        .btn-signup:hover {
            box-shadow: 0 0 30px rgba(0, 229, 255, 0.4);
            transform: translateY(-1px);
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
        }

        /* Hero Section */
        .hero-section {
            padding: 120px 0 60px;
            position: relative;
            overflow: hidden;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 380px;
            gap: 48px;
            align-items: center;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            border-radius: 50px;
            background: rgba(0, 229, 255, 0.1);
            border: 1px solid rgba(0, 229, 255, 0.2);
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-cyan);
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .hero-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-cyan);
            animation: pulse-dot 1.5s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; box-shadow: 0 0 6px var(--accent-cyan); }
            50% { opacity: 0.5; box-shadow: 0 0 12px var(--accent-cyan); }
        }

        .hero-title {
            font-size: 2.8rem;
            font-weight: 900;
            line-height: 1.2;
            letter-spacing: -0.03em;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-violet));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 1.05rem;
            line-height: 1.7;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 540px;
        }

        .hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn-primary {
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 0.95rem;
            color: #000;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            cursor: pointer;
            transition: var(--transition-fast);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 20px rgba(0, 229, 255, 0.25);
        }
        .btn-primary:hover {
            box-shadow: 0 6px 30px rgba(0, 229, 255, 0.4);
            transform: translateY(-2px);
        }

        .btn-outline {
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid rgba(255,255,255,0.2);
            cursor: pointer;
            transition: var(--transition-fast);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-outline:hover {
            border-color: var(--accent-cyan);
            background: rgba(0,229,255,0.05);
        }

        .hero-sidebar {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-2xl);
            padding: 24px;
            box-shadow: var(--shadow-elevated);
            backdrop-filter: blur(10px);
            position: relative;
        }

        .hero-sidebar::before {
            content: '';
            position: absolute;
            inset: -1px;
            border-radius: var(--radius-2xl);
            padding: 1px;
            background: linear-gradient(135deg, rgba(0,229,255,0.3), transparent, rgba(123,47,255,0.2));
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            pointer-events: none;
        }

        .sidebar-title {
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 16px;
        }

        .stat-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-subtle);
        }
        .stat-row:last-child { border-bottom: none; }

        .stat-label { font-size: 0.85rem; color: var(--text-secondary); }
        .stat-value { font-weight: 700; font-size: 0.95rem; color: var(--accent-cyan); }
        .stat-change { font-size: 0.78rem; font-weight: 600; }
        .stat-up { color: var(--accent-green); }
        .stat-down { color: var(--accent-red); }

        /* Section common */
        .section {
            padding: 60px 0;
            position: relative;
            z-index: 1;
        }

        .section-header {
            margin-bottom: 40px;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            line-height: 1.25;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.65;
            max-width: 620px;
        }

        /* Tier Cards (Ưu đãi bậc thang) */
        .tier-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .tier-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-xl);
            padding: 28px 24px;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .tier-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(255,255,255,0.12);
            transform: translateY(-4px);
            box-shadow: var(--shadow-elevated);
        }

        .tier-card.featured {
            border-color: var(--border-neon);
            box-shadow: var(--shadow-neon);
        }

        .tier-card.featured::before {
            content: 'PHỔ BIẾN NHẤT';
            position: absolute;
            top: 16px;
            right: -30px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            color: #000;
            font-size: 0.65rem;
            font-weight: 800;
            padding: 4px 36px;
            transform: rotate(45deg);
            letter-spacing: 0.04em;
        }

        .tier-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 16px;
        }

        .tier-icon.bronze { background: rgba(205, 127, 50, 0.2); color: #CD7F32; }
        .tier-icon.silver { background: rgba(192, 192, 192, 0.2); color: #C0C0C0; }
        .tier-icon.gold { background: rgba(255, 215, 0, 0.2); color: #FFD700; }

        .tier-name { font-weight: 800; font-size: 1.2rem; margin-bottom: 6px; }
        .tier-limit { font-size: 0.82rem; color: var(--text-muted); margin-bottom: 14px; }
        .tier-benefit-list { list-style: none; margin-bottom: 20px; }
        .tier-benefit-list li {
            font-size: 0.85rem;
            color: var(--text-secondary);
            padding: 6px 0;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }
        .tier-benefit-list li i { color: var(--accent-green); margin-top: 3px; font-size: 0.7rem; }
        .tier-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 100%;
            padding: 10px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 0.85rem;
            text-decoration: none;
            background: rgba(255,255,255,0.06);
            color: var(--text-primary);
            border: 1px solid var(--border-subtle);
            transition: var(--transition-fast);
            cursor: pointer;
        }
        .tier-cta:hover { background: rgba(255,255,255,0.1); }
        .tier-cta.primary-cta {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            color: #000;
            border: none;
        }
        .tier-cta.primary-cta:hover {
            box-shadow: 0 0 24px rgba(0, 229, 255, 0.4);
        }

        /* Compare Table */
        .compare-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-subtle);
            background: var(--bg-card);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 700px;
        }

        .compare-table th {
            text-align: left;
            padding: 16px 20px;
            font-weight: 700;
            font-size: 0.85rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            border-bottom: 1px solid var(--border-subtle);
            background: rgba(0,0,0,0.2);
        }

        .compare-table td {
            padding: 14px 20px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-subtle);
        }

        .compare-table tr:last-child td { border-bottom: none; }
        .compare-table .check { color: var(--accent-green); }
        .compare-table .cross { color: var(--accent-red); }
        .compare-table .highlight-row { background: rgba(0,229,255,0.03); }

        /* Security bar */
        .security-bar {
            background: var(--bg-secondary);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-xl);
            padding: 24px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }

        .security-item {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .security-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: rgba(0,255,136,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: var(--accent-green);
        }

        .security-text { font-size: 0.85rem; font-weight: 600; color: var(--text-secondary); }

        /* Hot Topics / Related */
        .ranking-list {
            list-style: none;
        }

        .ranking-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 14px 0;
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition-fast);
            text-decoration: none;
            color: inherit;
        }
        .ranking-item:last-child { border-bottom: none; }
        .ranking-item:hover { color: var(--accent-cyan); }

        .rank-num {
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .rank-num.top { background: linear-gradient(135deg, #FFD700, #FFA000); color: #000; }
        .rank-num.hot { background: rgba(0,229,255,0.15); color: var(--accent-cyan); }
        .rank-num.normal { background: rgba(255,255,255,0.05); color: var(--text-muted); }

        .rank-info { flex: 1; }
        .rank-title { font-weight: 600; font-size: 0.9rem; }
        .rank-meta { font-size: 0.75rem; color: var(--text-muted); margin-top: 2px; }

        .rank-stat {
            display: flex;
            align-items: center;
            gap: 4px;
            font-size: 0.8rem;
            color: var(--accent-cyan);
            font-weight: 600;
        }

        /* News list */
        .news-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 32px;
        }

        .news-main-list { display: flex; flex-direction: column; gap: 0; }

        .news-item {
            display: flex;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-subtle);
            text-decoration: none;
            color: inherit;
            transition: var(--transition-fast);
            align-items: flex-start;
        }
        .news-item:hover { color: var(--accent-cyan); }
        .news-item:last-child { border-bottom: none; }

        .news-thumb {
            width: 80px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: var(--bg-card);
            flex-shrink: 0;
            object-fit: cover;
        }

        .news-item-content { flex: 1; }
        .news-item-title { font-weight: 600; font-size: 0.9rem; line-height: 1.4; margin-bottom: 4px; }
        .news-item-date { font-size: 0.75rem; color: var(--text-muted); }

        .news-sidebar {
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-subtle);
            padding: 24px;
        }

        .news-sidebar-title {
            font-weight: 700;
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            color: var(--text-muted);
            margin-bottom: 16px;
        }

        /* Flash Deal Banner */
        .flash-banner {
            background: linear-gradient(135deg, rgba(123,47,255,0.15), rgba(0,102,255,0.15));
            border: 1px solid rgba(123,47,255,0.25);
            border-radius: var(--radius-2xl);
            padding: 40px 36px;
            text-align: left;
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 24px;
        }

        .flash-banner::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(0,229,255,0.1) 0%, transparent 70%);
            pointer-events: none;
        }

        .flash-content { position: relative; z-index: 2; }
        .flash-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border-radius: 50px;
            background: rgba(255,56,96,0.15);
            color: var(--accent-red);
            font-weight: 700;
            font-size: 0.75rem;
            letter-spacing: 0.04em;
            margin-bottom: 12px;
        }
        .flash-label i { animation: pulse-dot 1s ease-in-out infinite; }

        .flash-title { font-size: 1.6rem; font-weight: 800; margin-bottom: 8px; }
        .flash-desc { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 16px; max-width: 400px; }
        .flash-timer {
            display: flex;
            gap: 8px;
            margin-bottom: 16px;
        }
        .timer-box {
            background: rgba(0,0,0,0.5);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            padding: 6px 12px;
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--accent-cyan);
            min-width: 48px;
            text-align: center;
        }
        .timer-label { font-size: 0.65rem; color: var(--text-muted); text-align: center; }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 40px 0 30px;
            position: relative;
            z-index: 1;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
        }

        .footer-brand .logo-link {
            font-size: 1.1rem;
            margin-bottom: 12px;
            display: inline-flex;
        }

        .footer-desc {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-top: 8px;
        }

        .footer-col-title {
            font-weight: 700;
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--text-muted);
            margin-bottom: 14px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-links a {
            font-size: 0.85rem;
            color: var(--text-secondary);
            text-decoration: none;
            transition: var(--transition-fast);
        }
        .footer-links a:hover { color: var(--accent-cyan); }

        .footer-bottom {
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid var(--border-subtle);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .footer-badges {
            display: flex;
            gap: 12px;
            align-items: center;
            font-size: 0.75rem;
        }
        .footer-badges span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 10px;
            border-radius: 50px;
            background: rgba(0,255,136,0.1);
            color: var(--accent-green);
            font-weight: 600;
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 24px;
            bottom: 80px;
            z-index: 90;
            width: 52px;
            height: 52px;
            border-radius: 50px;
            background: rgba(10, 13, 20, 0.7);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-smooth);
            box-shadow: 0 0 18px rgba(0, 229, 255, 0.25);
            color: var(--accent-cyan);
            font-size: 1.2rem;
            text-decoration: none;
        }

        .fab::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50px;
            padding: 2px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-violet), var(--accent-pink));
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            z-index: -1;
        }

        .fab:hover {
            box-shadow: 0 0 30px rgba(0, 229, 255, 0.5);
            transform: scale(1.08);
        }

        .fab-notif {
            position: absolute;
            top: 4px;
            right: 6px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent-pink);
            box-shadow: 0 0 8px var(--accent-pink);
            animation: pulse-dot 1.2s ease-in-out infinite;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid { grid-template-columns: 1fr; }
            .hero-sidebar { max-width: 420px; }
            .tier-grid { grid-template-columns: repeat(2, 1fr); }
            .news-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .header-inner { height: 60px; }
            .nav-list { display: none; }
            .mobile-menu-btn { display: block; }
            .hero-title { font-size: 1.8rem; }
            .hero-desc { font-size: 0.9rem; }
            .section { padding: 40px 0; }
            .section-title { font-size: 1.5rem; }
            .tier-grid { grid-template-columns: 1fr; }
            .compare-table-wrap { border-radius: var(--radius-lg); }
            .flash-banner { padding: 28px 20px; }
            .flash-title { font-size: 1.3rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .fab { left: 16px; bottom: 70px; width: 44px; height: 44px; font-size: 1rem; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero-section { padding: 100px 0 40px; }
            .hero-title { font-size: 1.5rem; }
            .hero-actions { flex-direction: column; }
            .btn-primary, .btn-outline { width: 100%; justify-content: center; }
            .security-bar { flex-direction: column; align-items: flex-start; }
        }

/* roulang page: article */
:root {
            --bg-primary: #0A0D14;
            --bg-secondary: #131720;
            --bg-card: #1A1F2E;
            --bg-card-hover: #21283A;
            --bg-surface: rgba(26, 31, 46, 0.6);
            --accent-cyan: #00E5FF;
            --accent-blue: #0066FF;
            --accent-violet: #7B2FFF;
            --accent-pink: #FF00A8;
            --accent-gold: #FFD700;
            --accent-green: #00FF88;
            --accent-red: #FF3860;
            --text-primary: #FFFFFF;
            --text-secondary: #B0B8C8;
            --text-muted: #6B7280;
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-neon: rgba(0, 229, 255, 0.3);
            --shadow-neon: 0 0 20px rgba(0, 229, 255, 0.2), 0 0 60px rgba(0, 229, 255, 0.05);
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-elevated: 0 8px 40px rgba(0, 0, 0, 0.6);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --font-sans: 'Be Vietnam Pro', 'Inter', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(ellipse at 20% 20%, rgba(0, 102, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 60%, rgba(123, 47, 255, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 90%, rgba(0, 229, 255, 0.04) 0%, transparent 50%);
            pointer-events: none;
            z-index: 0;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 100;
            background: rgba(10, 13, 20, 0.85);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition-smooth);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.3);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: wrap;
        }

        .nav-list a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-md);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .nav-list a:hover,
        .nav-list a.active {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }

        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .btn-login {
            padding: 8px 18px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.88rem;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-subtle);
            cursor: pointer;
            transition: var(--transition-fast);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
        }

        .btn-login:hover {
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(255, 255, 255, 0.15);
        }

        .btn-signup {
            padding: 8px 20px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.88rem;
            color: #000;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            cursor: pointer;
            transition: var(--transition-fast);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.25);
        }

        .btn-signup:hover {
            box-shadow: 0 0 24px rgba(0, 229, 255, 0.4);
            transform: translateY(-1px);
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            cursor: pointer;
        }

        .article-hero {
            padding: 120px 0 60px;
            position: relative;
            z-index: 1;
        }

        .article-hero-content {
            max-width: 860px;
            margin: 0 auto;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 24px;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: var(--transition-fast);
        }

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

        .breadcrumb i {
            font-size: 0.65rem;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 20px;
            font-size: 0.88rem;
            color: var(--text-muted);
        }

        .article-meta .category-tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            background: rgba(0, 229, 255, 0.1);
            border: 1px solid rgba(0, 229, 255, 0.25);
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--accent-cyan);
            font-weight: 600;
            text-decoration: none;
        }

        .article-title {
            font-size: 2.4rem;
            font-weight: 900;
            line-height: 1.25;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .article-featured-img {
            width: 100%;
            max-height: 420px;
            object-fit: cover;
            border-radius: var(--radius-xl);
            margin: 32px 0;
            border: 1px solid var(--border-subtle);
        }

        .article-body {
            max-width: 860px;
            margin: 0 auto;
            padding: 0 0 80px;
            position: relative;
            z-index: 1;
        }

        .article-content {
            font-size: 1.05rem;
            line-height: 1.75;
            color: var(--text-secondary);
        }

        .article-content h2 {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-primary);
            margin: 40px 0 16px;
            padding-top: 16px;
            border-top: 1px solid var(--border-subtle);
        }

        .article-content h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 32px 0 12px;
        }

        .article-content p {
            margin-bottom: 20px;
        }

        .article-content ul, .article-content ol {
            margin: 16px 0 24px 24px;
        }

        .article-content li {
            margin-bottom: 8px;
        }

        .article-content strong {
            color: var(--accent-cyan);
            font-weight: 700;
        }

        .article-content blockquote {
            border-left: 3px solid var(--accent-cyan);
            padding: 16px 24px;
            margin: 24px 0;
            background: var(--bg-surface);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            font-style: italic;
            color: var(--text-primary);
        }

        .article-content img {
            max-width: 100%;
            border-radius: var(--radius-lg);
            margin: 24px 0;
        }

        .article-content a {
            color: var(--accent-cyan);
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        .not-found-section {
            padding: 120px 0 80px;
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .not-found-section h1 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .not-found-section p {
            color: var(--text-secondary);
            margin-bottom: 32px;
        }

        .not-found-section .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border-radius: var(--radius-md);
            color: #000;
            font-weight: 700;
            text-decoration: none;
            transition: var(--transition-fast);
        }

        .not-found-section .btn-home:hover {
            box-shadow: var(--shadow-neon);
        }

        .related-section {
            padding: 60px 0 80px;
            position: relative;
            z-index: 1;
        }

        .related-title {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 32px;
            text-align: center;
        }

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

        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            overflow: hidden;
            transition: var(--transition-smooth);
            text-decoration: none;
            display: block;
        }

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

        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

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

        .related-card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .related-card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 60px 0 30px;
            position: relative;
            z-index: 1;
        }

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

        .footer-brand .logo-link {
            font-size: 1.1rem;
            margin-bottom: 12px;
            display: flex;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.6;
            margin-top: 12px;
        }

        .footer-col-title {
            font-weight: 700;
            font-size: 0.9rem;
            margin-bottom: 16px;
            color: var(--text-primary);
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.88rem;
            transition: var(--transition-fast);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.82rem;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 16px;
        }

        .footer-badges {
            display: flex;
            gap: 16px;
            align-items: center;
        }

        .footer-badges span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-subtle);
            font-size: 0.78rem;
            color: var(--accent-green);
        }

        .fab-btn {
            position: fixed;
            left: 20px;
            bottom: 100px;
            z-index: 50;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid transparent;
            background-clip: padding-box;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            box-shadow: 0 0 18px rgba(0, 229, 255, 0.35);
            transition: var(--transition-smooth);
            animation: fabFloat 3s ease-in-out infinite;
        }

        .fab-btn::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50%;
            padding: 2px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-violet));
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            z-index: -1;
        }

        .fab-btn:hover {
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 229, 255, 0.55);
            animation: none;
        }

        .fab-btn:active {
            transform: scale(0.95);
        }

        @keyframes fabFloat {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }

        @media (max-width: 1024px) {
            .nav-list {
                gap: 2px;
            }
            .nav-list a {
                padding: 8px 12px;
                font-size: 0.82rem;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .article-title {
                font-size: 2rem;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 60px;
            }
            .nav-list {
                display: none;
                position: absolute;
                top: 60px;
                left: 0;
                width: 100%;
                background: rgba(10, 13, 20, 0.95);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px;
                border-bottom: 1px solid var(--border-subtle);
                z-index: 99;
            }
            .nav-list.open {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .article-title {
                font-size: 1.6rem;
            }
            .article-content {
                font-size: 1rem;
            }
            .container {
                padding: 0 16px;
            }
            .article-hero {
                padding: 100px 0 40px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0A0D14;
            --bg-secondary: #131720;
            --bg-card: #1A1F2E;
            --bg-card-hover: #21283A;
            --bg-surface: rgba(26, 31, 46, 0.6);
            --accent-cyan: #00E5FF;
            --accent-blue: #0066FF;
            --accent-violet: #7B2FFF;
            --accent-pink: #FF00A8;
            --accent-gold: #FFD700;
            --accent-green: #00FF88;
            --accent-red: #FF3860;
            --text-primary: #FFFFFF;
            --text-secondary: #B0B8C8;
            --text-muted: #6B7280;
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-neon: rgba(0, 229, 255, 0.3);
            --shadow-neon: 0 0 20px rgba(0, 229, 255, 0.2), 0 0 60px rgba(0, 229, 255, 0.05);
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-elevated: 0 8px 40px rgba(0, 0, 0, 0.6);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --font-sans: 'Be Vietnam Pro', 'Inter', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(ellipse at 20% 20%, rgba(0, 102, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 60%, rgba(123, 47, 255, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 90%, rgba(0, 229, 255, 0.04) 0%, transparent 50%);
            pointer-events: none;
            z-index: 0;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 100;
            background: rgba(10, 13, 20, 0.85);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition-smooth);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.3);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: wrap;
        }

        .nav-list a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-md);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .nav-list a:hover,
        .nav-list a.active {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }

        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .btn-login {
            padding: 8px 18px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.88rem;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-subtle);
            cursor: pointer;
            transition: var(--transition-fast);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
        }

        .btn-login:hover {
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(255, 255, 255, 0.15);
        }

        .btn-signup {
            padding: 8px 20px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.88rem;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            cursor: pointer;
            transition: var(--transition-fast);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            box-shadow: 0 2px 8px rgba(0, 229, 255, 0.3);
        }

        .btn-signup:hover {
            box-shadow: 0 4px 20px rgba(0, 229, 255, 0.5);
            transform: translateY(-1px);
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
        }

        @media (max-width: 1024px) {
            .hamburger {
                display: block;
            }
            .nav-list {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                width: 100%;
                background: rgba(10, 13, 20, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 8px;
                border-bottom: 1px solid var(--border-subtle);
            }
            .nav-list.active-mobile {
                display: flex;
            }
            .nav-actions {
                margin-left: auto;
                margin-right: 12px;
            }
        }

        .hero-category {
            padding: 120px 0 80px;
            position: relative;
            overflow: hidden;
            text-align: left;
        }

        .hero-category::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            opacity: 0.15;
            z-index: 0;
            pointer-events: none;
        }

        .hero-category-content {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .hero-category-text .badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 215, 0, 0.15);
            border: 1px solid rgba(255, 215, 0, 0.3);
            border-radius: 20px;
            color: var(--accent-gold);
            font-weight: 600;
            font-size: 0.85rem;
            margin-bottom: 20px;
        }

        .hero-category-text h1 {
            font-size: 2.8rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 20px;
            color: var(--text-primary);
            letter-spacing: -0.03em;
        }

        .hero-category-text h1 span {
            background: linear-gradient(135deg, var(--accent-gold), #FFA500);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-category-text .desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 32px;
        }

        .hero-category-visual {
            position: relative;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .hero-card-visual {
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            aspect-ratio: 9/16;
            max-width: 340px;
            margin: 0 auto;
            box-shadow: var(--shadow-elevated);
        }

        .hero-card-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1rem;
            background: linear-gradient(135deg, var(--accent-gold), #FF8C00);
            color: #000;
            text-decoration: none;
            transition: var(--transition-fast);
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            border: none;
            cursor: pointer;
        }

        .btn-cta-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(255, 215, 0, 0.45);
        }

        .btn-cta-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 1rem;
            background: transparent;
            border: 1px solid var(--accent-gold);
            color: var(--accent-gold);
            text-decoration: none;
            transition: var(--transition-fast);
            cursor: pointer;
        }

        .btn-cta-secondary:hover {
            background: rgba(255, 215, 0, 0.08);
        }

        @media (max-width: 768px) {
            .hero-category {
                padding: 100px 0 60px;
            }
            .hero-category-content {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-category-text h1 {
                font-size: 2rem;
            }
            .hero-card-visual {
                max-width: 260px;
            }
        }

        .section {
            padding: 80px 0;
            position: relative;
        }

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

        .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            text-align: left;
        }

        .section-header p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 700px;
            text-align: left;
        }

        .tactics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 40px;
        }

        .tactic-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
            text-align: left;
        }

        .tactic-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-neon);
            box-shadow: var(--shadow-neon);
            transform: translateY(-4px);
        }

        .tactic-card .tactic-number {
            font-size: 3rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
            margin-bottom: 12px;
        }

        .tactic-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .tactic-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        .tactic-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(0, 229, 255, 0.1);
            color: var(--accent-cyan);
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

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

        @media (max-width: 640px) {
            .tactics-grid {
                grid-template-columns: 1fr;
            }
        }

        .comparison-table-wrapper {
            overflow-x: auto;
            margin: 40px 0;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            background: var(--bg-card);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
            text-align: left;
        }

        .comparison-table th {
            padding: 16px 20px;
            font-weight: 700;
            font-size: 0.85rem;
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.05);
            border-bottom: 1px solid var(--border-subtle);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .comparison-table td {
            padding: 14px 20px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-subtle);
        }

        .comparison-table tr:last-child td {
            border-bottom: none;
        }

        .comparison-table tr:hover td {
            background: rgba(255, 255, 255, 0.02);
        }

        .highlight-badge {
            display: inline-block;
            padding: 4px 10px;
            border-radius: 6px;
            font-size: 0.8rem;
            font-weight: 700;
        }

        .badge-success {
            background: rgba(0, 255, 136, 0.15);
            color: var(--accent-green);
        }

        .badge-warning {
            background: rgba(255, 215, 0, 0.15);
            color: var(--accent-gold);
        }

        .badge-danger {
            background: rgba(255, 56, 96, 0.15);
            color: var(--accent-red);
        }

        .steps-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin: 40px 0;
        }

        .step-item {
            text-align: left;
            position: relative;
            padding: 24px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            transition: var(--transition-smooth);
        }

        .step-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.1);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            margin-bottom: 16px;
        }

        .step-item h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

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

        @media (max-width: 640px) {
            .steps-flow {
                grid-template-columns: 1fr;
            }
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin: 40px 0;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition-fast);
            text-align: left;
        }

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

        .faq-question {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-primary);
            transition: var(--transition-fast);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }

        .faq-question i {
            transition: transform 0.3s ease;
            color: var(--accent-cyan);
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

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

        .cta-section {
            padding: 80px 0;
            background: var(--bg-secondary);
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255, 215, 0, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .cta-inner h2 {
            font-size: 2.2rem;
            font-weight: 900;
            margin-bottom: 16px;
        }

        .cta-inner p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 32px;
        }

        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 60px 0 30px;
            text-align: left;
        }

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

        .footer-brand .logo-link {
            margin-bottom: 12px;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
            max-width: 320px;
        }

        .footer-col-title {
            font-weight: 700;
            font-size: 0.9rem;
            margin-bottom: 16px;
            color: var(--text-primary);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

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

        .footer-links a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.9rem;
            transition: var(--transition-fast);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid var(--border-subtle);
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .footer-badges {
            display: flex;
            gap: 16px;
            align-items: center;
        }

        .footer-badges span {
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
        }

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

        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 90;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.2rem;
            cursor: pointer;
            transition: var(--transition-fast);
            box-shadow: 0 0 15px rgba(0, 229, 255, 0.5);
            animation: pulse-glow 2s infinite;
            text-decoration: none;
        }

        .fab-left:hover {
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(0, 229, 255, 0.7);
        }

        @keyframes pulse-glow {
            0%, 100% { box-shadow: 0 0 15px rgba(0, 229, 255, 0.5); }
            50% { box-shadow: 0 0 30px rgba(0, 229, 255, 0.8); }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0A0D14;
            --bg-secondary: #131720;
            --bg-card: #1A1F2E;
            --bg-card-hover: #21283A;
            --bg-surface: rgba(26, 31, 46, 0.6);
            --accent-cyan: #00E5FF;
            --accent-blue: #0066FF;
            --accent-violet: #7B2FFF;
            --accent-pink: #FF00A8;
            --accent-gold: #FFD700;
            --accent-green: #00FF88;
            --accent-red: #FF3860;
            --text-primary: #FFFFFF;
            --text-secondary: #B0B8C8;
            --text-muted: #6B7280;
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-neon: rgba(0, 229, 255, 0.3);
            --shadow-neon: 0 0 20px rgba(0, 229, 255, 0.2), 0 0 60px rgba(0, 229, 255, 0.05);
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-elevated: 0 8px 40px rgba(0, 0, 0, 0.6);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --font-sans: 'Be Vietnam Pro', 'Inter', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background:
                radial-gradient(ellipse at 20% 20%, rgba(0, 102, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 60%, rgba(123, 47, 255, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 90%, rgba(0, 229, 255, 0.04) 0%, transparent 50%);
            pointer-events: none;
            z-index: 0;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 100;
            background: rgba(10, 13, 20, 0.85);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition-smooth);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.3);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: wrap;
        }

        .nav-list a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-md);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .nav-list a:hover,
        .nav-list a.active {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }

        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .btn-login {
            padding: 8px 18px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.88rem;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-subtle);
            cursor: pointer;
            transition: var(--transition-fast);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
        }

        .btn-login:hover {
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(255, 255, 255, 0.15);
        }

        .btn-signup {
            padding: 8px 20px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 0.88rem;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            cursor: pointer;
            transition: var(--transition-fast);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.25);
        }

        .btn-signup:hover {
            transform: translateY(-1px);
            box-shadow: 0 0 24px rgba(0, 229, 255, 0.4);
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 4px;
        }

        .page-banner {
            position: relative;
            padding: 140px 0 80px;
            background: linear-gradient(180deg, rgba(0, 102, 255, 0.12) 0%, transparent 100%);
            border-bottom: 1px solid var(--border-subtle);
        }

        .page-banner h1 {
            font-size: 2.6rem;
            font-weight: 900;
            letter-spacing: -0.03em;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--text-primary), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-banner .banner-desc {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 700px;
            line-height: 1.7;
        }

        .breadcrumb {
            display: flex;
            gap: 8px;
            align-items: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: var(--transition-fast);
        }

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

        .breadcrumb .sep {
            opacity: 0.4;
        }

        main {
            padding: 72px 0;
        }

        .intro-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-2xl);
            padding: 40px 36px;
            margin-bottom: 48px;
            display: flex;
            gap: 40px;
            align-items: center;
            transition: var(--transition-smooth);
        }

        .intro-card:hover {
            border-color: var(--border-neon);
            box-shadow: var(--shadow-neon);
        }

        .intro-card .card-image {
            flex-shrink: 0;
            width: 280px;
            height: auto;
            border-radius: var(--radius-lg);
            overflow: hidden;
        }

        .intro-card .card-image img {
            width: 100%;
            height: auto;
            display: block;
        }

        .intro-card .card-body h2 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .intro-card .card-body p {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.7;
        }

        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-bottom: 64px;
        }

        .stat-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: left;
            transition: var(--transition-smooth);
        }

        .stat-item:hover {
            border-color: var(--border-neon);
            box-shadow: var(--shadow-card);
        }

        .stat-item .stat-icon {
            font-size: 2rem;
            margin-bottom: 12px;
            color: var(--accent-cyan);
        }

        .stat-item .stat-value {
            font-size: 2.2rem;
            font-weight: 900;
            letter-spacing: -0.02em;
            margin-bottom: 4px;
        }

        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.025em;
            margin-bottom: 16px;
        }

        .section-sub {
            color: var(--text-secondary);
            font-size: 1rem;
            margin-bottom: 36px;
            line-height: 1.6;
            max-width: 700px;
        }

        .rule-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
            margin-bottom: 64px;
        }

        .rule-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-xl);
            padding: 32px 28px;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .rule-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--accent-cyan);
            border-radius: var(--radius-sm) 0 0 var(--radius-sm);
            opacity: 0;
            transition: var(--transition-fast);
        }

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

        .rule-card:hover {
            border-color: var(--border-neon);
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }

        .rule-card .rule-num {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--accent-cyan);
            opacity: 0.15;
            position: absolute;
            top: 16px;
            right: 20px;
            line-height: 1;
        }

        .rule-card h3 {
            font-size: 1.35rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .rule-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .outcome-table-wrap {
            overflow-x: auto;
            margin-bottom: 64px;
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-subtle);
        }

        .outcome-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--bg-card);
            min-width: 600px;
        }

        .outcome-table thead th {
            background: var(--bg-secondary);
            padding: 16px 20px;
            text-align: left;
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--accent-cyan);
            border-bottom: 1px solid var(--border-subtle);
        }

        .outcome-table tbody td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-subtle);
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        .outcome-table tbody tr:hover {
            background: rgba(255, 255, 255, 0.02);
        }

        .outcome-table .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.8rem;
            background: rgba(0, 229, 255, 0.12);
            color: var(--accent-cyan);
        }

        .tip-banner {
            background: linear-gradient(135deg, rgba(0, 229, 255, 0.08), rgba(0, 102, 255, 0.08));
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-2xl);
            padding: 40px 36px;
            margin-bottom: 64px;
            display: flex;
            gap: 32px;
            align-items: center;
        }

        .tip-banner .tip-icon {
            font-size: 3rem;
            flex-shrink: 0;
        }

        .tip-banner .tip-content h3 {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 8px;
        }

        .tip-banner .tip-content p {
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .faq-section {
            margin-bottom: 64px;
        }

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

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

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

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 20px 24px;
            color: var(--text-primary);
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            text-align: left;
            gap: 12px;
            transition: var(--transition-fast);
        }

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

        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

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

        .faq-question i {
            transition: var(--transition-fast);
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .cta-box {
            background: linear-gradient(135deg, rgba(0, 102, 255, 0.15), rgba(123, 47, 255, 0.15));
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-2xl);
            padding: 56px 40px;
            text-align: left;
            position: relative;
            overflow: hidden;
        }

        .cta-box h2 {
            font-size: 2rem;
            font-weight: 900;
            margin-bottom: 12px;
            letter-spacing: -0.025em;
        }

        .cta-box p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            margin-bottom: 28px;
            line-height: 1.7;
            max-width: 600px;
        }

        .cta-box .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1rem;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            text-decoration: none;
            transition: var(--transition-smooth);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.3);
        }

        .cta-box .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 32px rgba(0, 229, 255, 0.5);
        }

        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 56px 0 32px;
            margin-top: 48px;
        }

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

        .footer-brand .logo-link {
            margin-bottom: 12px;
            display: inline-flex;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .footer-col-title {
            font-weight: 700;
            font-size: 0.95rem;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

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

        .footer-links a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.9rem;
            transition: var(--transition-fast);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid var(--border-subtle);
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .footer-badges {
            display: flex;
            gap: 16px;
            align-items: center;
        }

        .footer-badges span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-card);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-secondary);
        }

        .footer-badges span i {
            color: var(--accent-green);
        }

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

            .rule-grid {
                grid-template-columns: 1fr;
            }

            .intro-card {
                flex-direction: column;
                text-align: left;
            }

            .intro-card .card-image {
                width: 100%;
                max-width: 400px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-list {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                width: 100%;
                background: rgba(10, 13, 20, 0.95);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px;
                gap: 2px;
                border-bottom: 1px solid var(--border-subtle);
            }

            .nav-list.open {
                display: flex;
            }

            .nav-list a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }

            .mobile-menu-toggle {
                display: block;
            }

            .page-banner h1 {
                font-size: 2rem;
            }

            .cta-box {
                padding: 36px 24px;
            }

            .cta-box h2 {
                font-size: 1.5rem;
            }

            .stats-row {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .tip-banner {
                flex-direction: column;
                text-align: left;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .page-banner {
                padding: 120px 0 48px;
            }

            .page-banner h1 {
                font-size: 1.6rem;
            }

            .section-title {
                font-size: 1.5rem;
            }

            .nav-actions .btn-login {
                padding: 6px 12px;
                font-size: 0.8rem;
            }

            .nav-actions .btn-signup {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
        }

/* roulang page: category3 */
@import url('/assets/css/vendor/9723b7396f-css2.css');

        :root {
            --bg-primary: #0A0D14;
            --bg-secondary: #131720;
            --bg-card: #1A1F2E;
            --bg-card-hover: #21283A;
            --bg-surface: rgba(26, 31, 46, 0.6);
            --accent-cyan: #00E5FF;
            --accent-blue: #0066FF;
            --accent-violet: #7B2FFF;
            --accent-pink: #FF00A8;
            --accent-gold: #FFD700;
            --accent-green: #00FF88;
            --accent-red: #FF3860;
            --text-primary: #FFFFFF;
            --text-secondary: #B0B8C8;
            --text-muted: #6B7280;
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-neon: rgba(0, 229, 255, 0.3);
            --shadow-neon: 0 0 20px rgba(0, 229, 255, 0.2), 0 0 60px rgba(0, 229, 255, 0.05);
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-elevated: 0 8px 40px rgba(0, 0, 0, 0.6);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --font-sans: 'Be Vietnam Pro', 'Inter', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(ellipse at 20% 20%, rgba(0, 102, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 60%, rgba(123, 47, 255, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 90%, rgba(0, 229, 255, 0.04) 0%, transparent 50%);
            pointer-events: none;
            z-index: 0;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 100;
            background: rgba(10, 13, 20, 0.85);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition-smooth);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.3);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: wrap;
        }
        .nav-list a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-md);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav-list a:hover,
        .nav-list a.active {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .btn-login {
            padding: 8px 18px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.88rem;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-subtle);
            cursor: pointer;
            transition: var(--transition-fast);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
        }
        .btn-login:hover { background: rgba(255,255,255,0.05); border-color: rgba(255,255,255,0.15); }
        .btn-signup {
            padding: 8px 20px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.88rem;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            cursor: pointer;
            transition: var(--transition-fast);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
        }
        .btn-signup:hover {
            box-shadow: 0 0 30px rgba(0, 229, 255, 0.4);
            transform: translateY(-1px);
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
            font-size: 1.4rem;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            cursor: pointer;
        }
        .page-hero {
            padding: 140px 0 80px;
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .page-hero .container { z-index: 1; position: relative; }
        .section { padding: 80px 0; }
        .section-dark { background: var(--bg-secondary); }
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 32px;
            transition: var(--transition-smooth);
        }
        .card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-neon);
            box-shadow: var(--shadow-neon);
            transform: translateY(-2px);
        }
        .metric-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px;
            text-align: left;
        }
        .metric-value {
            font-size: 2.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-violet));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-xl);
            font-weight: 700;
            font-size: 1rem;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            color: #fff;
            text-decoration: none;
            transition: var(--transition-fast);
            box-shadow: 0 0 24px rgba(0, 229, 255, 0.25);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            box-shadow: 0 0 36px rgba(0, 229, 255, 0.45);
            transform: translateY(-2px);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-xl);
            font-weight: 700;
            font-size: 1rem;
            background: transparent;
            border: 1.5px solid var(--accent-cyan);
            color: var(--accent-cyan);
            text-decoration: none;
            transition: var(--transition-fast);
            cursor: pointer;
        }
        .btn-outline:hover {
            background: rgba(0, 229, 255, 0.08);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
        }
        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .tag-green { background: rgba(0, 255, 136, 0.15); color: var(--accent-green); }
        .tag-cyan { background: rgba(0, 229, 255, 0.15); color: var(--accent-cyan); }
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo-link { font-size: 1.2rem; }
        .footer-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-top: 12px;
            line-height: 1.6;
        }
        .footer-col-title {
            font-weight: 700;
            font-size: 0.95rem;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.9rem;
            transition: var(--transition-fast);
        }
        .footer-links a:hover { color: var(--accent-cyan); }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-badges {
            display: flex;
            gap: 16px;
            align-items: center;
        }
        .footer-badges span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 20px;
            background: var(--bg-card);
            font-size: 0.8rem;
        }
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.5rem;
            cursor: pointer;
            transition: var(--transition-smooth);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.25);
            animation: fabPulse 2.5s ease-in-out infinite;
        }
        .fab-left::before {
            content: '';
            position: absolute;
            inset: -3px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-pink));
            z-index: -1;
            animation: glowRotate 4s linear infinite;
        }
        @keyframes glowRotate {
            0% { filter: hue-rotate(0deg); }
            100% { filter: hue-rotate(360deg); }
        }
        @keyframes fabPulse {
            0%, 100% { opacity: 0.7; transform: translateY(0); }
            50% { opacity: 1; transform: translateY(-6px); }
        }
        .fab-left:hover {
            transform: scale(1.15);
            opacity: 1;
            box-shadow: 0 0 40px rgba(0, 229, 255, 0.5);
        }
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-list { display: none; }
            .mobile-menu-btn { display: block; }
            .footer-grid { grid-template-columns: 1fr; }
            .page-hero { padding: 120px 0 60px; }
            .section { padding: 50px 0; }
            .metric-value { font-size: 2rem; }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #0A0D14;
            --bg-secondary: #131720;
            --bg-card: #1A1F2E;
            --bg-card-hover: #21283A;
            --bg-surface: rgba(26, 31, 46, 0.6);
            --accent-cyan: #00E5FF;
            --accent-blue: #0066FF;
            --accent-violet: #7B2FFF;
            --accent-pink: #FF00A8;
            --accent-gold: #FFD700;
            --accent-green: #00FF88;
            --accent-red: #FF3860;
            --accent-orange: #FF6B35;
            --text-primary: #FFFFFF;
            --text-secondary: #B0B8C8;
            --text-muted: #6B7280;
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-neon: rgba(0, 229, 255, 0.3);
            --shadow-neon: 0 0 20px rgba(0, 229, 255, 0.2), 0 0 60px rgba(0, 229, 255, 0.05);
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-elevated: 0 8px 40px rgba(0, 0, 0, 0.6);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --font-sans: 'Be Vietnam Pro', 'Inter', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
            margin: 0;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(ellipse at 20% 20%, rgba(0, 102, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 60%, rgba(123, 47, 255, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 90%, rgba(0, 229, 255, 0.04) 0%, transparent 50%);
            pointer-events: none;
            z-index: 0;
        }

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

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

        a {
            text-decoration: none;
            color: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 100;
            background: rgba(10, 13, 20, 0.9);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition-smooth);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: #fff;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.3);
            flex-shrink: 0;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
        }

        .nav-list a {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            border-radius: var(--radius-md);
            font-weight: 500;
            font-size: 0.88rem;
            color: var(--text-secondary);
            transition: var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .nav-list a:hover,
        .nav-list a.active {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }

        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .btn-login {
            padding: 8px 18px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.88rem;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-subtle);
            cursor: pointer;
            transition: var(--transition-fast);
            display: inline-flex;
            align-items: center;
        }

        .btn-login:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.2);
        }

        .btn-signup {
            padding: 9px 22px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 0.88rem;
            color: #000;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            cursor: pointer;
            transition: var(--transition-fast);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.25);
            display: inline-flex;
            align-items: center;
        }

        .btn-signup:hover {
            box-shadow: 0 0 28px rgba(0, 229, 255, 0.45);
            transform: translateY(-1px);
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.4rem;
            cursor: pointer;
            padding: 4px;
        }

        /* Hero Category */
        .hero-category {
            padding: 140px 0 80px;
            position: relative;
            overflow: hidden;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(ellipse at 50% 0%, rgba(0, 102, 255, 0.12) 0%, transparent 60%);
            pointer-events: none;
        }

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

        .hero-category-content h1 {
            font-size: 2.6rem;
            font-weight: 900;
            line-height: 1.2;
            margin: 0 0 20px;
            background: linear-gradient(135deg, #fff 0%, #B0B8C8 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-category-content .highlight {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-category-content p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0 0 28px;
        }

        .hero-stats-row {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }

        .hero-stat-item {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .hero-stat-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-md);
            background: var(--bg-card);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--accent-cyan);
            border: 1px solid var(--border-subtle);
        }

        .hero-stat-text strong {
            display: block;
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--text-primary);
        }

        .hero-stat-text span {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .hero-category-image {
            position: relative;
            border-radius: var(--radius-2xl);
            overflow: hidden;
            box-shadow: var(--shadow-elevated);
            border: 1px solid var(--border-subtle);
        }

        .hero-category-image img {
            width: 100%;
            height: auto;
            display: block;
        }

        .hero-image-badge {
            position: absolute;
            bottom: 16px;
            left: 16px;
            background: rgba(0, 0, 0, 0.75);
            backdrop-filter: blur(8px);
            padding: 8px 16px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 0.85rem;
            color: var(--accent-green);
            border: 1px solid rgba(0, 255, 136, 0.3);
        }

        .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            color: #000;
            font-weight: 700;
            font-size: 1rem;
            border-radius: var(--radius-lg);
            transition: var(--transition-smooth);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.25);
            border: none;
            cursor: pointer;
        }

        .btn-cta-primary:hover {
            box-shadow: 0 0 36px rgba(0, 229, 255, 0.45);
            transform: translateY(-2px);
        }

        /* Sections */
        .section {
            padding: 72px 0;
        }

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

        .section-label {
            display: inline-block;
            padding: 6px 14px;
            background: rgba(0, 229, 255, 0.1);
            border: 1px solid var(--border-neon);
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            margin: 0 0 12px;
            color: var(--text-primary);
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
            max-width: 680px;
        }

        /* Data Dashboard */
        .data-dashboard {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-bottom: 40px;
        }

        .data-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .data-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
            opacity: 0;
            transition: var(--transition-smooth);
        }

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

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

        .data-card-icon {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            background: var(--bg-surface);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-cyan);
        }

        .data-card-value {
            font-size: 2rem;
            font-weight: 900;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .data-card-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* Strategy Matrix */
        .strategy-matrix {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .strategy-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-xl);
            padding: 36px 32px;
            transition: var(--transition-smooth);
            position: relative;
        }

        .strategy-card:hover {
            border-color: var(--border-neon);
            box-shadow: var(--shadow-card);
        }

        .strategy-card-num {
            font-size: 3.5rem;
            font-weight: 900;
            position: absolute;
            top: 20px;
            right: 24px;
            color: rgba(255, 255, 255, 0.03);
            line-height: 1;
        }

        .strategy-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin: 0 0 12px;
            color: var(--text-primary);
        }

        .strategy-card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0 0 20px;
        }

        .strategy-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .strategy-tag {
            padding: 5px 12px;
            background: var(--bg-surface);
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 229, 255, 0.2);
        }

        /* Comparison Table */
        .comparison-table-wrap {
            overflow-x: auto;
            margin: 0 -24px;
            padding: 0 24px;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 700px;
        }

        .comparison-table thead th {
            background: var(--bg-card);
            padding: 16px 20px;
            text-align: left;
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--accent-cyan);
            border-bottom: 2px solid var(--border-neon);
            white-space: nowrap;
        }

        .comparison-table tbody td {
            padding: 14px 20px;
            border-bottom: 1px solid var(--border-subtle);
            font-size: 0.9rem;
            color: var(--text-secondary);
            vertical-align: top;
        }

        .comparison-table tbody tr:hover td {
            background: rgba(255, 255, 255, 0.02);
        }

        .comparison-table .check-icon {
            color: var(--accent-green);
        }

        .comparison-table .warn-icon {
            color: var(--accent-orange);
        }

        .comparison-table .x-icon {
            color: var(--accent-red);
        }

        /* FAQ */
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .faq-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 24px;
            transition: var(--transition-smooth);
            cursor: pointer;
        }

        .faq-card:hover {
            border-color: var(--border-neon);
        }

        .faq-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin: 0 0 10px;
            color: var(--text-primary);
        }

        .faq-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0;
        }

        /* CTA Section */
        .cta-section {
            padding: 80px 0;
            position: relative;
        }

        .cta-box {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-2xl);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 50% 50%, rgba(0, 229, 255, 0.06) 0%, transparent 60%);
            pointer-events: none;
        }

        .cta-box h3 {
            font-size: 1.8rem;
            font-weight: 800;
            margin: 0 0 12px;
            position: relative;
        }

        .cta-box p {
            color: var(--text-secondary);
            margin: 0 0 28px;
            font-size: 1.05rem;
            position: relative;
        }

        .cta-box .btn-cta-primary {
            position: relative;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 56px 0 32px;
            margin-top: 0;
        }

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

        .footer-brand .logo-link {
            margin-bottom: 14px;
        }

        .footer-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .footer-col-title {
            font-weight: 700;
            font-size: 0.95rem;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            font-size: 0.88rem;
            color: var(--text-secondary);
            transition: var(--transition-fast);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .footer-badges {
            display: flex;
            gap: 14px;
            align-items: center;
        }

        .footer-badges span {
            padding: 6px 12px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.78rem;
            color: var(--accent-green);
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(10, 13, 20, 0.8);
            backdrop-filter: blur(12px);
            border: 2px solid var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.3rem;
            cursor: pointer;
            transition: var(--transition-smooth);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.3);
            animation: fabPulse 2.5s ease-in-out infinite;
        }

        .fab:hover {
            box-shadow: 0 0 32px rgba(0, 229, 255, 0.55);
            transform: scale(1.08);
        }

        @keyframes fabPulse {
            0%, 100% { opacity: 0.7; }
            50% { opacity: 1; }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-category .container {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .hero-category-image {
                max-width: 500px;
                margin: 0 auto;
            }

            .data-dashboard {
                grid-template-columns: repeat(2, 1fr);
            }

            .strategy-matrix {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .hero-category-content h1 {
                font-size: 2.1rem;
            }
        }

        @media (max-width: 768px) {
            .nav-list {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                width: 100%;
                background: rgba(10, 13, 20, 0.98);
                flex-direction: column;
                padding: 16px 24px;
                border-bottom: 1px solid var(--border-subtle);
                backdrop-filter: blur(20px);
            }

            .nav-list.open {
                display: flex;
            }

            .mobile-menu-toggle {
                display: block;
            }

            .nav-actions {
                gap: 6px;
            }

            .btn-login,
            .btn-signup {
                padding: 6px 14px;
                font-size: 0.8rem;
            }

            .section {
                padding: 48px 0;
            }

            .section-title {
                font-size: 1.6rem;
            }

            .data-dashboard {
                grid-template-columns: 1fr;
            }

            .faq-grid {
                grid-template-columns: 1fr;
            }

            .comparison-table thead th,
            .comparison-table tbody td {
                padding: 10px 12px;
                font-size: 0.8rem;
            }

            .cta-box {
                padding: 36px 24px;
            }

            .cta-box h3 {
                font-size: 1.4rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }

            .hero-category {
                padding: 120px 0 48px;
            }

            .hero-category-content h1 {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                height: 60px;
            }

            .logo-link {
                font-size: 0.9rem;
                gap: 6px;
            }

            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.8rem;
            }

            .hero-category-content h1 {
                font-size: 1.5rem;
            }

            .hero-stats-row {
                flex-direction: column;
                gap: 16px;
            }

            .strategy-card {
                padding: 24px 20px;
            }

            .cta-box {
                padding: 28px 18px;
            }

            .section-title {
                font-size: 1.35rem;
            }

            .fab {
                width: 44px;
                height: 44px;
                font-size: 1.1rem;
                left: 8px;
                bottom: 80px;
            }
        }