/* roulang page: index */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: #111827;
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-color: #1E293B;
            --border-accent: #0052FF;
            --danger: #FF3366;
            --success: #10B981;
            --warning: #FBBF24;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
            --shadow-md: 0 4px 12px rgba(0,82,255,0.15);
            --shadow-lg: 0 8px 30px rgba(0,240,255,0.2);
            --shadow-glow: 0 0 20px rgba(0,240,255,0.5);
            --transition-fast: 0.15s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-main);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            margin: 0;
            padding: 0;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

        a:hover {
            color: var(--accent-primary);
        }

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

        button, .btn {
            cursor: pointer;
            transition: all var(--transition-smooth);
            font-weight: 600;
            border-radius: var(--radius-md);
            padding: 0.6rem 1.5rem;
            border: none;
            outline: none;
        }

        button:focus-visible, .btn:focus-visible, a:focus-visible {
            outline: 2px solid var(--accent-secondary);
            outline-offset: 2px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Header / Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(8,9,15,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(30,41,59,0.6);
            transition: background var(--transition-smooth);
        }

        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            padding: 0 1.5rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .navbar-logo {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            text-decoration: none;
            letter-spacing: -0.3px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .navbar-logo i {
            color: var(--accent-secondary);
            font-size: 1.4rem;
        }

        .navbar-links {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .navbar-links a {
            color: var(--text-secondary);
            padding: 0.5rem 1rem;
            border-radius: var(--radius-md);
            font-weight: 500;
            transition: all var(--transition-fast);
            text-decoration: none;
            display: inline-block;
        }

        .navbar-links a:hover,
        .navbar-links a.active {
            color: var(--text-primary);
            background: rgba(0,82,255,0.2);
        }

        .navbar-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 0.5rem 1.25rem;
            font-weight: 600;
            border-radius: var(--radius-md);
        }

        .btn-login:hover {
            border-color: var(--accent-secondary);
            color: var(--accent-secondary);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-primary), #0040cc);
            color: #fff;
            padding: 0.5rem 1.5rem;
            font-weight: 700;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            border: none;
        }

        .btn-signup:hover {
            background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
            box-shadow: var(--shadow-lg);
            transform: translateY(-1px);
            color: #fff;
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            padding: 0.5rem;
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-primary);
            flex-direction: column;
            padding: 2rem;
            gap: 0.5rem;
            z-index: 1040;
            overflow-y: auto;
        }

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

        .mobile-nav a {
            color: var(--text-primary);
            font-size: 1.2rem;
            padding: 1rem;
            border-radius: var(--radius-md);
            background: var(--bg-card);
        }

        /* Hero Section - Whitepaper Lead Gen */
        .hero-section {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 30% 50%, rgba(0,82,255,0.1) 0%, transparent 60%),
                        radial-gradient(circle at 70% 30%, rgba(0,240,255,0.08) 0%, transparent 60%);
            pointer-events: none;
        }

        .hero-whitepaper-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-cover {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(0,0,0,0.5);
            border: 1px solid var(--border-color);
        }

        .hero-cover img {
            width: 100%;
            height: auto;
            aspect-ratio: 3/4;
            object-fit: cover;
        }

        .hero-cover-badge {
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: var(--danger);
            color: #fff;
            padding: 0.35rem 1rem;
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.8rem;
            letter-spacing: 0.5px;
            box-shadow: 0 4px 15px rgba(255,51,102,0.5);
        }

        .hero-content h1 {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 1.25rem;
            background: linear-gradient(135deg, #fff, var(--accent-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-content .hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 2rem;
        }

        .hero-stats {
            display: flex;
            gap: 2rem;
            margin-bottom: 2rem;
        }

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

        .hero-stat-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-secondary);
            line-height: 1.2;
        }

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

        .hero-cta-group {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .btn-primary-glow {
            background: linear-gradient(135deg, var(--accent-primary), #0040cc);
            color: #fff;
            padding: 0.8rem 2.2rem;
            font-weight: 700;
            border-radius: var(--radius-md);
            box-shadow: 0 4px 20px rgba(0,82,255,0.4);
            border: none;
            font-size: 1rem;
        }

        .btn-primary-glow:hover {
            box-shadow: 0 6px 30px rgba(0,240,255,0.6);
            transform: translateY(-2px);
            background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
            color: #fff;
        }

        .btn-outline-accent {
            background: transparent;
            border: 2px solid var(--accent-secondary);
            color: var(--accent-secondary);
            padding: 0.8rem 2rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            font-size: 1rem;
        }

        .btn-outline-accent:hover {
            background: rgba(0,240,255,0.1);
            border-color: #fff;
            color: #fff;
        }

        /* Section Common */
        .section-block {
            padding: 70px 0;
        }

        .section-title {
            font-size: 1.9rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
        }

        .section-subtitle {
            color: var(--text-muted);
            font-size: 1rem;
            margin-bottom: 2.5rem;
            line-height: 1.5;
            max-width: 600px;
        }

        /* Trial Benefits - 试用权益 */
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
        }

        .benefit-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .benefit-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }

        .benefit-card:hover {
            border-color: var(--accent-primary);
            box-shadow: 0 8px 30px rgba(0,82,255,0.15);
            transform: translateY(-4px);
        }

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

        .benefit-icon {
            width: 50px;
            height: 50px;
            border-radius: var(--radius-md);
            background: rgba(0,240,255,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-secondary);
            margin-bottom: 1.25rem;
        }

        .benefit-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .benefit-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin: 0;
            line-height: 1.5;
        }

        /* Qualification */
        .qualification-block {
            background: var(--bg-secondary);
            border-radius: var(--radius-xl);
            padding: 3rem;
            border: 1px solid var(--border-color);
        }

        .qual-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 1.25rem;
        }

        .qual-list li {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            color: var(--text-secondary);
            font-size: 1rem;
        }

        .qual-list li i {
            color: var(--success);
            font-size: 1.3rem;
            margin-top: 2px;
        }

        /* Security Badges - 保障图标条 */
        .trust-strip {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            justify-content: center;
            align-items: center;
            padding: 2rem 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .trust-item {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .trust-item i {
            color: var(--accent-secondary);
            font-size: 1.4rem;
        }

        /* News Section */
        .news-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 2rem;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .news-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 1.25rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: all var(--transition-fast);
            text-decoration: none;
            color: var(--text-primary);
        }

        .news-item:hover {
            border-color: var(--accent-primary);
            background: #151d2e;
        }

        .news-item-title {
            font-weight: 600;
            flex: 1;
            margin-right: 1rem;
        }

        .news-item-meta {
            color: var(--text-muted);
            font-size: 0.85rem;
            white-space: nowrap;
        }

        .news-sidebar {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
        }

        .news-sidebar h4 {
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--accent-secondary);
        }

        .sidebar-tip {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.5;
        }

        /* CTA Form Block */
        .cta-form-block {
            background: linear-gradient(135deg, var(--bg-secondary), #0a1020);
            border-radius: var(--radius-xl);
            padding: 3rem;
            border: 1px solid var(--border-color);
            text-align: left;
        }

        .cta-form-block h2 {
            font-weight: 700;
            margin-bottom: 0.75rem;
        }

        .cta-form-block p {
            color: var(--text-secondary);
            margin-bottom: 2rem;
        }

        .form-row {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .form-input {
            flex: 1;
            min-width: 200px;
            padding: 0.8rem 1rem;
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            color: #fff;
            font-size: 1rem;
        }

        .form-input:focus {
            border-color: var(--accent-secondary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(0,240,255,0.15);
        }

        /* FAQ */
        .faq-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.25rem;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            transition: border-color var(--transition-fast);
        }

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

        .faq-item h5 {
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .faq-item p {
            color: var(--text-secondary);
            margin: 0;
            font-size: 0.95rem;
            line-height: 1.5;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 3rem 0 2rem;
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-col h5 {
            color: var(--text-primary);
            font-weight: 700;
            margin-bottom: 1rem;
            font-size: 1rem;
        }

        .footer-col a {
            display: block;
            color: var(--text-muted);
            margin-bottom: 0.5rem;
            text-decoration: none;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 1.5rem;
            text-align: center;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 1000;
        }

        .fab-btn {
            width: 56px;
            height: 56px;
            border-radius: 30px;
            background: rgba(8,9,15,0.75);
            backdrop-filter: blur(12px);
            border: 2px solid var(--accent-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-secondary);
            box-shadow: 0 0 20px rgba(0,240,255,0.4);
            opacity: 0.7;
            transition: all var(--transition-smooth);
            cursor: pointer;
        }

        .fab-btn:hover {
            opacity: 1;
            box-shadow: 0 0 35px rgba(0,240,255,0.7);
            transform: scale(1.08);
            color: #fff;
        }

        .fab-notification {
            position: absolute;
            top: 2px;
            right: 2px;
            width: 12px;
            height: 12px;
            background: var(--danger);
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: pulse-dot 1.8s infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(0.8); }
        }

        /* Responsive */
        @media (max-width: 992px) {
            .hero-whitepaper-grid {
                grid-template-columns: 1fr;
            }
            .hero-cover {
                max-width: 350px;
                margin: 0 auto;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
        }

        @media (max-width: 768px) {
            .navbar-links {
                display: none;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .navbar-actions .btn-login,
            .navbar-actions .btn-signup {
                padding: 0.4rem 1rem;
                font-size: 0.9rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: #111827;
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-color: #1E293B;
            --border-accent: #0052FF;
            --danger: #FF3366;
            --success: #10B981;
            --warning: #FBBF24;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
            --shadow-md: 0 4px 12px rgba(0,82,255,0.15);
            --shadow-lg: 0 8px 30px rgba(0,240,255,0.2);
            --shadow-glow: 0 0 20px rgba(0,240,255,0.5);
            --transition-fast: 0.15s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-main);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            margin: 0;
            padding: 0;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            padding-top: 70px;
        }

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

        a:hover {
            color: var(--accent-primary);
        }

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

        button,
        .btn {
            cursor: pointer;
            transition: all var(--transition-smooth);
            font-weight: 600;
            border-radius: var(--radius-md);
            padding: 0.6rem 1.5rem;
            border: none;
            outline: none;
        }

        button:focus-visible,
        .btn:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent-secondary);
            outline-offset: 2px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(30, 41, 59, 0.6);
            transition: background var(--transition-smooth);
        }

        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            padding: 0 1.5rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .navbar-logo {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            text-decoration: none;
            letter-spacing: -0.3px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .navbar-logo i {
            color: var(--accent-secondary);
            font-size: 1.4rem;
        }

        .navbar-links {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .navbar-links a {
            color: var(--text-secondary);
            padding: 0.5rem 1rem;
            border-radius: var(--radius-md);
            font-weight: 500;
            transition: all var(--transition-fast);
            text-decoration: none;
            display: inline-block;
        }

        .navbar-links a:hover,
        .navbar-links a.active {
            color: var(--text-primary);
            background: rgba(0, 82, 255, 0.2);
        }

        .navbar-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 0.5rem 1.25rem;
            font-weight: 600;
            border-radius: var(--radius-md);
        }

        .btn-login:hover {
            border-color: var(--accent-secondary);
            color: var(--accent-secondary);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-primary), #0040cc);
            color: #fff;
            padding: 0.5rem 1.5rem;
            font-weight: 700;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            border: none;
        }

        .btn-signup:hover {
            background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
            box-shadow: var(--shadow-lg);
            transform: translateY(-1px);
            color: #fff;
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            padding: 0.5rem;
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-primary);
            flex-direction: column;
            padding: 2rem;
            gap: 0.5rem;
            z-index: 1040;
            overflow-y: auto;
        }

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

        .mobile-nav a {
            color: var(--text-primary);
            font-size: 1.2rem;
            padding: 1rem;
            border-radius: var(--radius-md);
            background: var(--bg-card);
        }

        .hero-section {
            background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
            padding: 4rem 0 3rem;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 30% 50%, rgba(0, 240, 255, 0.05) 0%, transparent 50%);
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }

        .hero-content h1 {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 1.5rem;
            background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-secondary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-content p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 2rem;
        }

        .btn-hero {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-primary), #0040cc);
            color: #fff;
            padding: 0.85rem 2.5rem;
            font-weight: 700;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            font-size: 1.1rem;
            transition: all var(--transition-smooth);
            text-decoration: none;
        }

        .btn-hero:hover {
            background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
            transform: translateY(-3px);
            box-shadow: var(--shadow-glow);
            color: #fff;
        }

        .section {
            padding: 5rem 0;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            text-align: left;
        }

        .section-subtitle {
            color: var(--text-secondary);
            margin-bottom: 3rem;
            text-align: left;
            font-size: 1.1rem;
        }

        .promo-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2rem;
            transition: all var(--transition-smooth);
            height: 100%;
            position: relative;
            overflow: hidden;
        }

        .promo-card:hover {
            border-color: var(--border-accent);
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .promo-card.featured {
            border-color: var(--accent-secondary);
            box-shadow: var(--shadow-glow);
        }

        .promo-badge {
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: var(--danger);
            color: #fff;
            padding: 0.3rem 1rem;
            border-radius: var(--radius-sm);
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
        }

        .promo-badge.gold {
            background: linear-gradient(135deg, #FFD700, #FFBF00);
            color: #000;
        }

        .promo-icon {
            font-size: 2.5rem;
            color: var(--accent-secondary);
            margin-bottom: 1.5rem;
        }

        .promo-card h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .promo-amount {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--accent-secondary);
            margin-bottom: 0.5rem;
            line-height: 1.2;
        }

        .promo-detail {
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
            line-height: 1.7;
        }

        .promo-terms {
            background: rgba(0, 82, 255, 0.05);
            padding: 1rem;
            border-radius: var(--radius-sm);
            margin-bottom: 1.5rem;
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .btn-promo {
            display: inline-block;
            width: 100%;
            text-align: center;
            background: linear-gradient(135deg, var(--accent-primary), #0040cc);
            color: #fff;
            padding: 0.8rem 1.5rem;
            font-weight: 700;
            border-radius: var(--radius-md);
            text-decoration: none;
            transition: all var(--transition-smooth);
        }

        .btn-promo:hover {
            background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
            color: #fff;
            box-shadow: var(--shadow-md);
        }

        .process-step {
            display: flex;
            align-items: flex-start;
            gap: 1.5rem;
            margin-bottom: 2.5rem;
        }

        .step-number {
            flex-shrink: 0;
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.3rem;
            color: #fff;
        }

        .step-content h4 {
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .step-content p {
            color: var(--text-secondary);
            margin: 0;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }

        .comparison-table th {
            background: rgba(0, 82, 255, 0.1);
            padding: 1rem;
            text-align: left;
            font-weight: 700;
            color: var(--accent-secondary);
        }

        .comparison-table td {
            padding: 1rem;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-secondary);
        }

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

        .check-icon {
            color: var(--success);
            margin-right: 0.5rem;
        }

        .faq-list {
            max-width: 800px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 1rem;
            overflow: hidden;
            transition: all var(--transition-smooth);
        }

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

        .faq-question {
            padding: 1.2rem 1.5rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

        .faq-answer {
            padding: 0 1.5rem 1.5rem;
            color: var(--text-secondary);
            display: none;
            line-height: 1.7;
        }

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

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

        .cta-section {
            background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 3rem;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .cta-section p {
            color: var(--text-secondary);
            margin-bottom: 2rem;
            font-size: 1.1rem;
        }

        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 4rem 0 2rem;
            margin-top: 2rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-col h5 {
            font-weight: 700;
            margin-bottom: 1.2rem;
            color: var(--text-primary);
        }

        .footer-col a {
            display: block;
            color: var(--text-muted);
            margin-bottom: 0.7rem;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 2rem;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .fab-support {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 1040;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
            animation: floatFAB 2.5s ease-in-out infinite;
        }

        .fab-support::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            z-index: -1;
            opacity: 0.8;
            transition: opacity var(--transition-smooth);
        }

        .fab-support i {
            color: var(--accent-secondary);
            font-size: 1.5rem;
            transition: all var(--transition-smooth);
        }

        .fab-support:hover {
            transform: scale(1.15);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
            opacity: 1;
        }

        .fab-support:hover i {
            color: #fff;
            text-shadow: 0 0 10px rgba(0, 240, 255, 0.8);
        }

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

        .fab-notification {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 16px;
            height: 16px;
            background: var(--danger);
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: pulseNoti 1.5s ease-in-out infinite;
        }

        @keyframes pulseNoti {
            0%,
            100% {
                transform: scale(1);
                opacity: 1;
            }
            50% {
                transform: scale(1.4);
                opacity: 0.7;
            }
        }

        @media (max-width: 1024px) {
            .navbar-links {
                display: none;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-content h1 {
                font-size: 2rem;
            }
        }

        @media (max-width: 768px) {
            .hero-content h1 {
                font-size: 1.6rem;
            }
            .hero-content p {
                font-size: 1rem;
            }
            .section {
                padding: 3rem 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .comparison-table {
                font-size: 0.85rem;
            }
            .cta-section {
                padding: 2rem 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .fab-support {
                left: 1rem;
                bottom: 5rem;
                width: 48px;
                height: 48px;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: #111827;
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-color: #1E293B;
            --border-accent: #0052FF;
            --danger: #FF3366;
            --success: #10B981;
            --warning: #FBBF24;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
            --shadow-md: 0 4px 12px rgba(0,82,255,0.15);
            --shadow-lg: 0 8px 30px rgba(0,240,255,0.2);
            --shadow-glow: 0 0 20px rgba(0,240,255,0.5);
            --transition-fast: 0.15s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-main);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            margin: 0;
            padding: 0;
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

        a:hover {
            color: var(--accent-primary);
        }

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

        button, .btn {
            cursor: pointer;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition-smooth);
            border: none;
            outline: none;
        }

        button:focus-visible, .btn:focus-visible, a:focus-visible {
            outline: 2px solid var(--accent-secondary);
            outline-offset: 2px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(8,9,15,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(30,41,59,0.6);
            transition: background var(--transition-smooth);
        }

        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            padding: 0 1.5rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .navbar-logo {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            text-decoration: none;
            letter-spacing: -0.3px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .navbar-logo i {
            color: var(--accent-secondary);
            font-size: 1.4rem;
        }

        .navbar-links {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .navbar-links a {
            color: var(--text-secondary);
            padding: 0.5rem 1rem;
            border-radius: var(--radius-md);
            font-weight: 500;
            transition: all var(--transition-fast);
            text-decoration: none;
            display: inline-block;
        }

        .navbar-links a:hover,
        .navbar-links a.active {
            color: var(--text-primary);
            background: rgba(0,82,255,0.2);
        }

        .navbar-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 0.5rem 1.25rem;
            font-weight: 600;
            border-radius: var(--radius-md);
        }

        .btn-login:hover {
            border-color: var(--accent-secondary);
            color: var(--accent-secondary);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-primary), #0040cc);
            color: #fff;
            padding: 0.5rem 1.5rem;
            font-weight: 700;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            border: none;
        }

        .btn-signup:hover {
            background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
            box-shadow: var(--shadow-lg);
            transform: translateY(-1px);
            color: #fff;
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            padding: 0.5rem;
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-primary);
            flex-direction: column;
            padding: 2rem;
            gap: 0.5rem;
            z-index: 1040;
            overflow-y: auto;
        }

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

        .mobile-nav a {
            color: var(--text-primary);
            font-size: 1.2rem;
            padding: 1rem;
            border-radius: var(--radius-md);
            background: var(--bg-card);
        }

        /* Page Header */
        .page-header {
            background: linear-gradient(180deg, rgba(0,82,255,0.08) 0%, var(--bg-primary) 100%), url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            padding: 8rem 0 3rem;
            border-bottom: 1px solid var(--border-color);
            position: relative;
        }

        .page-header .breadcrumb {
            background: transparent;
            padding: 0;
            margin-bottom: 1.5rem;
        }

        .page-header .breadcrumb-item a {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .page-header .breadcrumb-item.active {
            color: var(--accent-secondary);
            font-size: 0.9rem;
        }

        .page-header h1 {
            font-size: clamp(2rem, 5vw, 2.8rem);
            font-weight: 800;
            letter-spacing: -0.5px;
            line-height: 1.3;
            margin-bottom: 1rem;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1.5rem;
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .article-meta span {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        .article-meta i {
            color: var(--accent-secondary);
        }

        /* Article Body */
        .article-body-wrapper {
            padding: 4rem 0;
            background-color: var(--bg-primary);
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 3rem;
            align-items: start;
        }

        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            padding: 3rem;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .article-content h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            color: var(--text-primary);
            border-left: 4px solid var(--accent-secondary);
            padding-left: 1rem;
        }

        .article-content h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
        }

        .article-content p {
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 1.5rem;
            font-size: 1.05rem;
        }

        .article-content img {
            border-radius: var(--radius-lg);
            margin: 2rem 0;
            border: 1px solid var(--border-color);
        }

        .article-content ul, .article-content ol {
            color: var(--text-secondary);
            padding-left: 1.5rem;
            margin-bottom: 1.5rem;
        }

        .article-content li {
            margin-bottom: 0.5rem;
            line-height: 1.7;
        }

        .article-content blockquote {
            background: rgba(0,82,255,0.1);
            border-left: 4px solid var(--accent-primary);
            padding: 1.5rem 2rem;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 2rem 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            font-size: 0.95rem;
        }

        .article-content th {
            background: var(--bg-secondary);
            color: var(--accent-secondary);
            padding: 1rem;
            text-align: left;
            border-bottom: 2px solid var(--border-accent);
        }

        .article-content td {
            padding: 1rem;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-secondary);
        }

        /* Sidebar */
        .article-sidebar {
            position: sticky;
            top: 90px;
        }

        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 2rem;
            border: 1px solid var(--border-color);
            margin-bottom: 2rem;
        }

        .sidebar-card h4 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .sidebar-card h4 i {
            color: var(--accent-secondary);
        }

        .sidebar-post-item {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid var(--border-color);
        }

        .sidebar-post-item:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }

        .sidebar-post-thumb {
            width: 80px;
            height: 60px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg-secondary);
        }

        .sidebar-post-info a {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-primary);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .sidebar-post-info a:hover {
            color: var(--accent-secondary);
        }

        .sidebar-post-info small {
            color: var(--text-muted);
            font-size: 0.8rem;
            margin-top: 0.3rem;
            display: block;
        }

        .cta-banner {
            background: linear-gradient(135deg, var(--accent-primary), #0040cc);
            border-radius: var(--radius-lg);
            padding: 2rem;
            text-align: center;
            color: #fff;
            margin-bottom: 2rem;
        }

        .cta-banner h4 {
            font-weight: 700;
            margin-bottom: 0.75rem;
        }

        .cta-banner p {
            font-size: 0.9rem;
            opacity: 0.9;
            margin-bottom: 1.25rem;
        }

        .btn-cta-banner {
            background: #fff;
            color: var(--accent-primary);
            font-weight: 700;
            padding: 0.7rem 2rem;
            border-radius: var(--radius-md);
            display: inline-block;
        }

        .btn-cta-banner:hover {
            background: var(--accent-secondary);
            color: #000;
        }

        /* Not Found State */
        .not-found-state {
            text-align: center;
            padding: 5rem 2rem;
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-color);
        }

        .not-found-state i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }

        .not-found-state h3 {
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .not-found-state p {
            color: var(--text-muted);
            margin-bottom: 2rem;
        }

        .btn-back-home {
            background: var(--accent-primary);
            color: #fff;
            padding: 0.75rem 2rem;
            font-weight: 700;
            border-radius: var(--radius-md);
            display: inline-block;
        }

        .btn-back-home:hover {
            background: var(--accent-secondary);
            color: #000;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 4rem 0 2rem;
            margin-top: 2rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }

        .footer-col h5 {
            color: var(--text-primary);
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 1.25rem;
            letter-spacing: 0.2px;
        }

        .footer-col a {
            display: block;
            color: var(--text-muted);
            margin-bottom: 0.7rem;
            font-size: 0.95rem;
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            padding-top: 2rem;
            border-top: 1px solid var(--border-color);
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* FAB */
        .fab-floating {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 1080;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(8,9,15,0.85);
            backdrop-filter: blur(15px);
            -webkit-backdrop-filter: blur(15px);
            border: 2px solid var(--accent-secondary);
            box-shadow: 0 0 20px rgba(0,240,255,0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-secondary);
            font-size: 1.6rem;
            cursor: pointer;
            transition: all var(--transition-smooth);
            animation: fab-float 3s ease-in-out infinite;
        }

        .fab-floating:hover {
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0,240,255,0.8);
            border-color: #fff;
            color: #fff;
        }

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

        .fab-notification {
            position: absolute;
            top: 4px;
            right: 4px;
            width: 12px;
            height: 12px;
            background: var(--danger);
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: blink-dot 1.4s infinite;
        }

        @keyframes blink-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }

            .article-sidebar {
                position: static;
            }

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

        @media (max-width: 768px) {
            .navbar-links {
                display: none;
            }

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

            .navbar-logo {
                font-size: 0.95rem;
            }

            .page-header {
                padding: 7rem 0 2rem;
            }

            .article-content {
                padding: 1.5rem;
                border-radius: var(--radius-lg);
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

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

            .article-meta {
                gap: 0.75rem;
                font-size: 0.85rem;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: #111827;
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-color: #1E293B;
            --border-accent: #0052FF;
            --danger: #FF3366;
            --success: #10B981;
            --warning: #FBBF24;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
            --shadow-md: 0 4px 12px rgba(0,82,255,0.15);
            --shadow-lg: 0 8px 30px rgba(0,240,255,0.2);
            --shadow-glow: 0 0 20px rgba(0,240,255,0.5);
            --transition-fast: 0.15s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-main);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            margin: 0;
            padding: 0;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

        a:hover {
            color: var(--accent-primary);
        }

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

        button, .btn {
            cursor: pointer;
            transition: all var(--transition-smooth);
            font-weight: 600;
            border-radius: var(--radius-md);
            padding: 0.6rem 1.5rem;
            border: none;
            outline: none;
        }

        button:focus-visible, .btn:focus-visible, a:focus-visible {
            outline: 2px solid var(--accent-secondary);
            outline-offset: 2px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(8,9,15,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(30,41,59,0.6);
            transition: background var(--transition-smooth);
        }

        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            padding: 0 1.5rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .navbar-logo {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            text-decoration: none;
            letter-spacing: -0.3px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .navbar-logo i {
            color: var(--accent-secondary);
            font-size: 1.4rem;
        }

        .navbar-links {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .navbar-links a {
            color: var(--text-secondary);
            padding: 0.5rem 1rem;
            border-radius: var(--radius-md);
            font-weight: 500;
            transition: all var(--transition-fast);
            text-decoration: none;
            display: inline-block;
        }

        .navbar-links a:hover,
        .navbar-links a.active {
            color: var(--text-primary);
            background: rgba(0,82,255,0.2);
        }

        .navbar-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 0.5rem 1.25rem;
            font-weight: 600;
            border-radius: var(--radius-md);
        }

        .btn-login:hover {
            border-color: var(--accent-secondary);
            color: var(--accent-secondary);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-primary), #0040cc);
            color: #fff;
            padding: 0.5rem 1.5rem;
            font-weight: 700;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            border: none;
        }

        .btn-signup:hover {
            background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
            box-shadow: var(--shadow-lg);
            transform: translateY(-1px);
            color: #fff;
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            padding: 0.5rem;
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-primary);
            flex-direction: column;
            padding: 2rem;
            gap: 0.5rem;
            z-index: 1040;
            overflow-y: auto;
        }

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

        .mobile-nav a {
            color: var(--text-primary);
            font-size: 1.2rem;
            padding: 1rem;
            border-radius: var(--radius-md);
            background: var(--bg-card);
        }

        /* Hero Section */
        .hero-category {
            padding-top: 120px;
            padding-bottom: 80px;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(8,9,15,0.92) 0%, rgba(13,17,30,0.88) 100%);
            z-index: 0;
        }

        .hero-category .container-custom {
            position: relative;
            z-index: 1;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: 2.5rem;
            align-items: center;
        }

        .hero-left h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 1.25rem;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }

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

        .hero-left p {
            color: var(--text-secondary);
            font-size: 1.1rem;
            line-height: 1.7;
            margin-bottom: 2rem;
        }

        .hero-kpi {
            display: flex;
            gap: 2rem;
            margin-bottom: 2rem;
        }

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

        .hero-kpi-item .kpi-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent-secondary);
            line-height: 1;
        }

        .hero-kpi-item .kpi-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 0.25rem;
        }

        .hero-right {
            position: relative;
        }

        .hero-right img {
            width: 100%;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            border: 2px solid var(--border-color);
        }

        .btn-cta-primary {
            background: linear-gradient(135deg, var(--accent-primary), #0040cc);
            color: #fff;
            font-weight: 700;
            padding: 0.8rem 2rem;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            border: none;
            display: inline-block;
        }

        .btn-cta-primary:hover {
            background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            color: #fff;
        }

        /* Dashboard Section */
        .dashboard-section {
            padding: 80px 0;
            background: var(--bg-secondary);
        }

        .section-header {
            margin-bottom: 3rem;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 1.05rem;
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .metric-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            text-align: left;
            transition: all var(--transition-smooth);
        }

        .metric-card:hover {
            border-color: var(--border-accent);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .metric-card .metric-icon {
            font-size: 2rem;
            color: var(--accent-secondary);
            margin-bottom: 1rem;
        }

        .metric-card .metric-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }

        .metric-card .metric-label {
            font-size: 0.95rem;
            color: var(--text-muted);
        }

        /* Service Matrix */
        .service-section {
            padding: 80px 0;
            background: var(--bg-primary);
        }

        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2rem;
            transition: all var(--transition-smooth);
            text-align: left;
        }

        .service-card:hover {
            border-color: var(--accent-secondary);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }

        .service-card .service-icon {
            width: 48px;
            height: 48px;
            background: rgba(0,240,255,0.1);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-secondary);
            margin-bottom: 1.25rem;
        }

        .service-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
        }

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

        /* Comparison Section */
        .comparison-section {
            padding: 80px 0;
            background: var(--bg-secondary);
        }

        .comparison-table {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }

        .comparison-row {
            display: grid;
            grid-template-columns: 2fr 1.5fr 1.5fr 1.5fr;
            padding: 1.25rem 2rem;
            border-bottom: 1px solid var(--border-color);
            align-items: center;
        }

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

        .comparison-row.header-row {
            background: var(--bg-primary);
            font-weight: 700;
            color: var(--accent-secondary);
            font-size: 1rem;
        }

        .comparison-row .col {
            font-size: 0.95rem;
            color: var(--text-secondary);
        }

        .comparison-row .col strong {
            color: var(--text-primary);
        }

        .check-icon {
            color: var(--success);
            font-weight: 700;
        }

        /* FAQ Section */
        .faq-section {
            padding: 80px 0;
            background: var(--bg-primary);
        }

        .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md) !important;
            margin-bottom: 0.75rem;
        }

        .accordion-button {
            background: var(--bg-card);
            color: var(--text-primary);
            font-weight: 600;
            padding: 1.25rem;
            border-radius: var(--radius-md) !important;
            box-shadow: none !important;
        }

        .accordion-button:not(.collapsed) {
            background: var(--bg-card);
            color: var(--accent-secondary);
            box-shadow: none;
        }

        .accordion-button::after {
            filter: invert(1);
        }

        .accordion-body {
            color: var(--text-secondary);
            padding: 1.25rem;
            line-height: 1.7;
        }

        /* CTA Section */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--bg-secondary), var(--bg-primary));
        }

        .cta-box {
            background: linear-gradient(135deg, rgba(0,82,255,0.1), rgba(0,240,255,0.05));
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-xl);
            padding: 3rem;
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 2rem;
            align-items: center;
        }

        .cta-left h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .cta-left p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            line-height: 1.7;
        }

        .cta-right {
            text-align: center;
        }

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

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
        }

        .footer-col h5 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
            color: var(--text-primary);
        }

        .footer-col a {
            display: block;
            color: var(--text-muted);
            margin-bottom: 0.75rem;
            font-size: 0.95rem;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid var(--border-color);
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 1050;
            width: 56px;
            height: 56px;
            border-radius: 50px;
            background: rgba(0,0,0,0.7);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-secondary);
            font-size: 1.4rem;
            box-shadow: 0 0 18px rgba(0,240,255,0.45);
            cursor: pointer;
            transition: all var(--transition-smooth);
            animation: fabPulse 2.5s ease-in-out infinite;
        }

        .fab-left::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: inherit;
            background: linear-gradient(135deg, #00F0FF, #0052FF);
            z-index: -1;
        }

        .fab-left:hover {
            box-shadow: 0 0 30px rgba(0,240,255,0.8);
            transform: scale(1.12);
            opacity: 1;
        }

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

        .fab-notification {
            position: absolute;
            top: 6px;
            right: 8px;
            width: 12px;
            height: 12px;
            background: var(--danger);
            border-radius: 50%;
            border: 2px solid #000;
            animation: blink 1.2s ease-in-out infinite;
        }

        @keyframes fabPulse {
            0%, 100% { opacity: 0.65; }
            50% { opacity: 0.9; }
        }

        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .navbar-links {
                display: none;
            }
            .navbar-actions .btn-login,
            .navbar-actions .btn-signup {
                display: block;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .hero-right {
                order: -1;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .comparison-row {
                grid-template-columns: 2fr 1.5fr 1.5fr 1.5fr;
                padding: 1rem;
                font-size: 0.85rem;
            }
            .cta-box {
                grid-template-columns: 1fr;
                padding: 2rem;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .hero-category {
                padding-top: 100px;
                padding-bottom: 60px;
            }
            .hero-left h1 {
                font-size: 2rem;
            }
            .metric-card .metric-value {
                font-size: 1.6rem;
            }
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .service-grid {
                grid-template-columns: 1fr;
            }
            .comparison-row {
                grid-template-columns: 1fr 1fr;
                gap: 0.5rem;
                padding: 0.75rem;
            }
            .comparison-row.header-row {
                display: none;
            }
            .cta-box {
                padding: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 0.75rem;
                text-align: center;
            }
            .fab-left {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 1rem;
                bottom: 5rem;
            }
        }

        @media (max-width: 520px) {
            .hero-kpi {
                flex-direction: column;
                gap: 1rem;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: #111827;
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-color: #1E293B;
            --border-accent: #0052FF;
            --danger: #FF3366;
            --success: #10B981;
            --warning: #FBBF24;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
            --shadow-md: 0 4px 12px rgba(0,82,255,0.15);
            --shadow-lg: 0 8px 30px rgba(0,240,255,0.2);
            --shadow-glow: 0 0 20px rgba(0,240,255,0.5);
            --transition-fast: 0.15s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-main);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            margin: 0;
            padding: 0;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

        a:hover {
            color: var(--accent-primary);
        }

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

        button, .btn {
            cursor: pointer;
            transition: all var(--transition-smooth);
            font-weight: 600;
            border-radius: var(--radius-md);
            padding: 0.6rem 1.5rem;
            border: none;
            outline: none;
        }

        button:focus-visible, .btn:focus-visible, a:focus-visible {
            outline: 2px solid var(--accent-secondary);
            outline-offset: 2px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Header / Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(8,9,15,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(30,41,59,0.6);
            transition: background var(--transition-smooth);
        }

        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            padding: 0 1.5rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .navbar-logo {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            text-decoration: none;
            letter-spacing: -0.3px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .navbar-logo i {
            color: var(--accent-secondary);
            font-size: 1.4rem;
        }

        .navbar-links {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .navbar-links a {
            color: var(--text-secondary);
            padding: 0.5rem 1rem;
            border-radius: var(--radius-md);
            font-weight: 500;
            transition: all var(--transition-fast);
            text-decoration: none;
            display: inline-block;
        }

        .navbar-links a:hover,
        .navbar-links a.active {
            color: var(--text-primary);
            background: rgba(0,82,255,0.2);
        }

        .navbar-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 0.5rem 1.25rem;
            font-weight: 600;
            border-radius: var(--radius-md);
        }

        .btn-login:hover {
            border-color: var(--accent-secondary);
            color: var(--accent-secondary);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-primary), #0040cc);
            color: #fff;
            padding: 0.5rem 1.5rem;
            font-weight: 700;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            border: none;
        }

        .btn-signup:hover {
            background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
            box-shadow: var(--shadow-lg);
            transform: translateY(-1px);
            color: #fff;
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            padding: 0.5rem;
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-primary);
            flex-direction: column;
            padding: 2rem;
            gap: 0.5rem;
            z-index: 1040;
            overflow-y: auto;
        }

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

        .mobile-nav a {
            color: var(--text-primary);
            font-size: 1.2rem;
            padding: 1rem;
            border-radius: var(--radius-md);
            background: var(--bg-card);
        }

        /* Page Banner */
        .page-banner {
            padding-top: 100px;
            padding-bottom: 60px;
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }

        .page-banner .container-custom {
            position: relative;
            z-index: 1;
        }

        .page-banner h1 {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 1rem;
            letter-spacing: -0.5px;
            color: var(--text-primary);
        }

        .page-banner p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 750px;
            line-height: 1.7;
        }

        .page-banner .highlight {
            color: var(--accent-secondary);
        }

        /* Stats Bar */
        .stats-bar {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-color);
            padding: 1.5rem 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            text-align: center;
        }

        .stat-item .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-secondary);
            display: block;
        }

        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 0.25rem;
        }

        /* Section Title */
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 700px;
            margin-bottom: 2.5rem;
            line-height: 1.6;
        }

        /* Kèo Table Section */
        .keo-table-section {
            padding: 70px 0;
        }

        .keo-table-wrapper {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .keo-table-header {
            background: var(--bg-secondary);
            padding: 1rem 1.5rem;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .keo-table-header h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin: 0;
            color: var(--text-primary);
        }

        .live-badge {
            background: var(--danger);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.3rem 0.8rem;
            border-radius: 50px;
            animation: pulse-live 2s infinite;
        }

        @keyframes pulse-live {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.6; }
        }

        .keo-table {
            width: 100%;
            border-collapse: collapse;
        }

        .keo-table th {
            background: rgba(0,82,255,0.1);
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            padding: 1rem;
            text-align: left;
            border-bottom: 2px solid var(--border-color);
        }

        .keo-table td {
            padding: 1rem;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-secondary);
            vertical-align: middle;
        }

        .keo-table tr:hover td {
            background: rgba(0,240,255,0.03);
        }

        .match-info {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .match-teams {
            font-weight: 600;
            color: var(--text-primary);
            font-size: 0.95rem;
        }

        .match-time {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: block;
        }

        .odds-cell {
            text-align: center;
        }

        .odds-value {
            display: inline-block;
            background: rgba(0,82,255,0.15);
            color: var(--accent-secondary);
            padding: 0.3rem 1rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.95rem;
            min-width: 60px;
            cursor: pointer;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }

        .odds-value:hover {
            background: var(--accent-primary);
            color: #fff;
            border-color: var(--accent-secondary);
            box-shadow: var(--shadow-md);
        }

        .odds-value.best {
            background: rgba(16,185,129,0.2);
            color: var(--success);
            font-weight: 800;
        }

        .odds-label {
            font-size: 0.7rem;
            color: var(--text-muted);
            display: block;
            margin-top: 0.2rem;
        }

        /* Benefits Grid */
        .benefits-section {
            padding: 70px 0;
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .benefit-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2rem;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .benefit-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }

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

        .benefit-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--border-accent);
        }

        .benefit-icon {
            width: 55px;
            height: 55px;
            background: rgba(0,82,255,0.15);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.25rem;
            color: var(--accent-secondary);
            font-size: 1.5rem;
        }

        .benefit-card h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
        }

        .benefit-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        /* Process Section */
        .process-section {
            padding: 70px 0;
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            position: relative;
        }

        .process-step {
            text-align: left;
            position: relative;
        }

        .step-number {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            color: #fff;
            margin-bottom: 1rem;
            box-shadow: var(--shadow-md);
        }

        .process-step h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }

        .process-step p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
            margin: 0;
        }

        /* FAQ Section */
        .faq-section {
            padding: 70px 0;
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
        }

        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            transition: all var(--transition-smooth);
        }

        .faq-item:hover {
            border-color: var(--border-accent);
            box-shadow: var(--shadow-md);
        }

        .faq-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
            display: flex;
            align-items: flex-start;
            gap: 0.5rem;
        }

        .faq-item h4 i {
            color: var(--accent-secondary);
            font-size: 0.9rem;
            margin-top: 0.2rem;
        }

        .faq-item p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        /* CTA Section */
        .cta-section {
            padding: 80px 0;
            text-align: left;
        }

        .cta-box {
            background: linear-gradient(135deg, rgba(0,82,255,0.2), rgba(0,240,255,0.1));
            border: 2px solid var(--border-accent);
            border-radius: var(--radius-xl);
            padding: 3rem;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .cta-box h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .cta-box p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin-bottom: 2rem;
            line-height: 1.6;
        }

        .btn-cta-primary {
            background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            padding: 0.85rem 2.5rem;
            border-radius: 50px;
            box-shadow: var(--shadow-glow);
            border: none;
            display: inline-block;
            text-decoration: none;
        }

        .btn-cta-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0,240,255,0.7);
            color: #fff;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 50px 0 30px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-col h5 {
            color: var(--text-primary);
            font-weight: 700;
            margin-bottom: 1rem;
            font-size: 1rem;
        }

        .footer-col a {
            display: block;
            color: var(--text-muted);
            margin-bottom: 0.5rem;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid var(--border-color);
            padding-top: 1.5rem;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* FAB */
        .fab-support {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 1040;
            width: 56px;
            height: 56px;
            border-radius: 50px;
            background: rgba(17,24,39,0.85);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0 1.5rem;
            cursor: pointer;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 15px rgba(0,240,255,0.5);
            overflow: hidden;
            white-space: nowrap;
            border-image: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary)) 1;
        }

        .fab-support i {
            color: var(--accent-secondary);
            font-size: 1.5rem;
            animation: neon-flicker 3s infinite;
        }

        @keyframes neon-flicker {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.7; }
        }

        .fab-support:hover {
            box-shadow: 0 0 30px rgba(0,240,255,0.8);
            transform: scale(1.05);
            width: auto;
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .benefits-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .navbar-links {
                display: none;
            }
            .mobile-menu-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .navbar-actions .btn-login,
            .navbar-actions .btn-signup {
                padding: 0.4rem 1rem;
                font-size: 0.85rem;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .benefits-grid,
            .faq-grid,
            .process-steps,
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .keo-table-wrapper {
                overflow-x: auto;
            }
            .keo-table th,
            .keo-table td {
                padding: 0.75rem;
                font-size: 0.8rem;
            }
            .cta-box {
                padding: 2rem;
            }
            .cta-box h2 {
                font-size: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .navbar-custom {
                padding: 0 1rem;
            }
            .navbar-logo {
                font-size: 0.9rem;
            }
            .navbar-actions .btn-login {
                font-size: 0.75rem;
                padding: 0.3rem 0.75rem;
            }
            .navbar-actions .btn-signup {
                font-size: 0.75rem;
                padding: 0.3rem 0.75rem;
            }
            .page-banner h1 {
                font-size: 1.4rem;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: #111827;
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-color: #1E293B;
            --border-accent: #0052FF;
            --danger: #FF3366;
            --success: #10B981;
            --warning: #FBBF24;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
            --shadow-md: 0 4px 12px rgba(0,82,255,0.15);
            --shadow-lg: 0 8px 30px rgba(0,240,255,0.2);
            --shadow-glow: 0 0 20px rgba(0,240,255,0.5);
            --transition-fast: 0.15s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-main);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            margin: 0;
            padding: 0;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            padding-top: 70px;
        }

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

        a:hover {
            color: var(--accent-primary);
        }

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

        button, .btn {
            cursor: pointer;
            transition: all var(--transition-smooth);
            font-weight: 600;
            border-radius: var(--radius-md);
            padding: 0.6rem 1.5rem;
            border: none;
            outline: none;
        }

        button:focus-visible, .btn:focus-visible, a:focus-visible {
            outline: 2px solid var(--accent-secondary);
            outline-offset: 2px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(8,9,15,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(30,41,59,0.6);
            transition: background var(--transition-smooth);
        }

        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            padding: 0 1.5rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .navbar-logo {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            text-decoration: none;
            letter-spacing: -0.3px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .navbar-logo i {
            color: var(--accent-secondary);
            font-size: 1.4rem;
        }

        .navbar-links {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .navbar-links a {
            color: var(--text-secondary);
            padding: 0.5rem 1rem;
            border-radius: var(--radius-md);
            font-weight: 500;
            transition: all var(--transition-fast);
            text-decoration: none;
            display: inline-block;
        }

        .navbar-links a:hover,
        .navbar-links a.active {
            color: var(--text-primary);
            background: rgba(0,82,255,0.2);
        }

        .navbar-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 0.5rem 1.25rem;
            font-weight: 600;
            border-radius: var(--radius-md);
        }

        .btn-login:hover {
            border-color: var(--accent-secondary);
            color: var(--accent-secondary);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-primary), #0040cc);
            color: #fff;
            padding: 0.5rem 1.5rem;
            font-weight: 700;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            border: none;
        }

        .btn-signup:hover {
            background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
            box-shadow: var(--shadow-lg);
            transform: translateY(-1px);
            color: #fff;
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            padding: 0.5rem;
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-primary);
            flex-direction: column;
            padding: 2rem;
            gap: 0.5rem;
            z-index: 1040;
            overflow-y: auto;
        }

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

        .mobile-nav a {
            color: var(--text-primary);
            font-size: 1.2rem;
            padding: 1rem;
            border-radius: var(--radius-md);
            background: var(--bg-card);
        }

        .page-banner {
            background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-card) 100%);
            padding: 3rem 0;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }

        .page-banner h1 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .page-banner p {
            color: var(--text-secondary);
            font-size: 1.1rem;
            max-width: 700px;
        }

        .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            color: var(--text-primary);
            text-align: left;
        }

        .section-subtitle {
            color: var(--text-secondary);
            margin-bottom: 2rem;
            text-align: left;
        }

        .promo-card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2rem;
            transition: all var(--transition-smooth);
            margin-bottom: 2rem;
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .promo-card-custom:hover {
            border-color: var(--accent-secondary);
            box-shadow: 0 0 25px rgba(0,240,255,0.15);
            transform: translateY(-4px);
        }

        .promo-badge {
            background: linear-gradient(135deg, var(--danger), #ff5e7a);
            color: #fff;
            padding: 0.3rem 1rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            display: inline-block;
            margin-bottom: 1rem;
        }

        .promo-value {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--accent-secondary);
            margin-bottom: 0.5rem;
        }

        .promo-condition {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }

        .btn-promo {
            background: transparent;
            border: 2px solid var(--accent-secondary);
            color: var(--accent-secondary);
            padding: 0.75rem 1.5rem;
            font-weight: 700;
            border-radius: var(--radius-md);
            margin-top: auto;
            text-align: center;
        }

        .btn-promo:hover {
            background: var(--accent-secondary);
            color: var(--bg-primary);
            box-shadow: var(--shadow-glow);
        }

        .highlight-box {
            background: linear-gradient(135deg, rgba(0,82,255,0.1), rgba(0,240,255,0.05));
            border-left: 4px solid var(--accent-secondary);
            padding: 1.5rem;
            border-radius: var(--radius-md);
            margin-bottom: 2rem;
        }

        .value-prop-list {
            list-style: none;
            padding-left: 0;
        }

        .value-prop-list li {
            padding: 0.5rem 0;
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            color: var(--text-secondary);
        }

        .value-prop-list i {
            color: var(--success);
            margin-top: 0.25rem;
        }

        .site-footer {
            background: var(--bg-secondary);
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
            border-top: 1px solid var(--border-color);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-col h5 {
            color: var(--text-primary);
            margin-bottom: 1rem;
            font-weight: 700;
        }

        .footer-col a, .footer-col p {
            color: var(--text-muted);
            display: block;
            margin-bottom: 0.5rem;
            font-size: 0.9rem;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .step-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            margin: 3rem 0;
        }

        .step-item {
            text-align: left;
            position: relative;
        }

        .step-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--accent-primary);
            line-height: 1;
            margin-bottom: 0.5rem;
        }

        .step-item h6 {
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }

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

        .faq-section {
            margin-top: 3rem;
        }

        .accordion-faq .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            margin-bottom: 1rem;
            border-radius: var(--radius-md);
        }

        .accordion-faq .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            box-shadow: none;
        }

        .accordion-faq .accordion-button:not(.collapsed) {
            background: rgba(0,82,255,0.1);
            color: var(--accent-secondary);
        }

        .accordion-faq .accordion-body {
            color: var(--text-secondary);
        }

        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 5rem;
            z-index: 1000;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(8,9,15,0.85);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-secondary);
            font-size: 1.5rem;
            box-shadow: 0 0 15px rgba(0,240,255,0.4);
            transition: all var(--transition-smooth);
            cursor: pointer;
            animation: float 3s ease-in-out infinite;
        }

        .fab-left:hover {
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0,240,255,0.7);
        }

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

        .notification-dot {
            position: absolute;
            top: 6px;
            right: 6px;
            width: 12px;
            height: 12px;
            background: var(--danger);
            border-radius: 50%;
            animation: blink 1.5s infinite;
        }

        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

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

        @media (max-width: 768px) {
            .navbar-links {
                display: none;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .promo-value {
                font-size: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 0.5rem;
                text-align: center;
            }
            .step-flow {
                grid-template-columns: 1fr;
            }
            .navbar-actions .btn-login,
            .navbar-actions .btn-signup {
                display: block;
            }
        }

        @media (max-width: 520px) {
            .page-banner {
                padding: 2rem 0;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .promo-card-custom {
                padding: 1.5rem;
            }
        }