/* roulang page: index */
:root {
            --primary: #FFD700;
            --secondary: #D32F2F;
            --dark: #0A2E1C;
            --forest: #123E25;
            --mint: #D1F2EB;
            --pale: #E8F5F0;
            --text-white: #FFFFFF;
            --text-muted: #A3B8AC;
            --border-gold: rgba(255, 215, 0, 0.35);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-card: 0 4px 20px rgba(0,0,0,0.3);
            --shadow-gold: 0 8px 32px rgba(255, 215, 0, 0.25);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: 'Be Vietnam Pro', 'Segoe UI', 'Roboto', sans-serif;
            background-color: var(--dark);
            color: var(--text-white);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section-padding {
            padding: 72px 0;
        }

        .text-gold {
            color: var(--primary);
        }

        .text-muted-custom {
            color: var(--text-muted);
        }

        .bg-gradient-dark {
            background: linear-gradient(180deg, #0A2E1C 0%, #0D3522 50%, #0A2E1C 100%);
        }

        .border-gold-subtle {
            border: 1px solid var(--border-gold);
        }

        /* Navigation */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: rgba(10, 46, 28, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 215, 0, 0.15);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .navbar.scrolled {
            background: rgba(10, 46, 28, 0.98);
            box-shadow: 0 4px 20px rgba(0,0,0,0.4);
        }

        .navbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            gap: 16px;
        }

        .logo {
            font-size: 1.15rem;
            font-weight: 800;
            letter-spacing: -0.01em;
            color: var(--primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 420px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .logo i {
            font-size: 1.4rem;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin-left: auto;
        }

        .nav-links li a {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--mint);
            position: relative;
            padding: 8px 0;
            transition: color var(--transition);
            white-space: nowrap;
        }

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

        .nav-links li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: width var(--transition);
            border-radius: 1px;
        }

        .nav-links li a:hover::after, .nav-links li a.active::after {
            width: 100%;
        }

        .nav-auth {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .btn-login {
            padding: 10px 18px;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--mint);
            background: transparent;
            border: 1px solid rgba(209, 242, 235, 0.3);
            border-radius: 50px;
            transition: all var(--transition);
            cursor: pointer;
            white-space: nowrap;
        }

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

        .btn-signup {
            padding: 10px 22px;
            font-size: 0.85rem;
            font-weight: 800;
            color: var(--dark);
            background: var(--primary);
            border: none;
            border-radius: 50px;
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
            box-shadow: 0 4px 16px rgba(255, 215, 0, 0.3);
        }

        .btn-signup:hover {
            background: #FFE44D;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 215, 0, 0.4);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--primary);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px;
        }

        /* Hero */
        .hero {
            padding-top: 120px;
            padding-bottom: 72px;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            position: relative;
            min-height: 680px;
            display: flex;
            align-items: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 46, 28, 0.92) 0%, rgba(18, 62, 37, 0.85) 50%, rgba(10, 46, 28, 0.95) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 680px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            background: rgba(255, 215, 0, 0.12);
            border: 1px solid rgba(255, 215, 0, 0.3);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.02em;
            margin-bottom: 20px;
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            color: var(--text-white);
        }

        .hero h1 .highlight {
            color: var(--primary);
            position: relative;
        }

        .hero p {
            font-size: 1.1rem;
            color: var(--mint);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 580px;
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 32px;
        }

        .btn-primary-hero {
            padding: 16px 32px;
            font-size: 1rem;
            font-weight: 800;
            color: var(--dark);
            background: var(--primary);
            border: none;
            border-radius: 50px;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 8px 28px rgba(255, 215, 0, 0.35);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-primary-hero:hover {
            background: #FFE44D;
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(255, 215, 0, 0.45);
        }

        .btn-outline-hero {
            padding: 16px 32px;
            font-size: 1rem;
            font-weight: 700;
            color: var(--mint);
            background: transparent;
            border: 1px solid rgba(209, 242, 235, 0.4);
            border-radius: 50px;
            cursor: pointer;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-outline-hero:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(255, 215, 0, 0.08);
        }

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

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

        .hero-stat .stat-number {
            font-size: 1.8rem;
            font-weight: 900;
            color: var(--primary);
            line-height: 1.2;
        }

        .hero-stat .stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* Sections */
        .section-header {
            margin-bottom: 40px;
            max-width: 720px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 900;
            letter-spacing: -0.01em;
            margin-bottom: 14px;
            line-height: 1.25;
        }

        .section-header p {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .section-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 215, 0, 0.1);
            border: 1px solid rgba(255, 215, 0, 0.25);
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.04em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        /* Cards */
        .card-grid {
            display: grid;
            gap: 24px;
        }

        .card-grid-3 {
            grid-template-columns: repeat(3, 1fr);
        }

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

        .card-grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        .card {
            background: rgba(18, 62, 37, 0.6);
            border: 1px solid rgba(255, 215, 0, 0.15);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .card:hover {
            border-color: rgba(255, 215, 0, 0.4);
            transform: translateY(-4px);
            box-shadow: var(--shadow-gold);
            background: rgba(18, 62, 37, 0.8);
        }

        .card-icon {
            width: 52px;
            height: 52px;
            background: rgba(255, 215, 0, 0.12);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
            margin-bottom: 16px;
        }

        .card h3 {
            font-size: 1.15rem;
            font-weight: 800;
            margin-bottom: 10px;
            color: var(--text-white);
        }

        .card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Cover cards */
        .cover-card {
            background: rgba(18, 62, 37, 0.6);
            border: 1px solid rgba(255, 215, 0, 0.15);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
        }

        .cover-card:hover {
            border-color: rgba(255, 215, 0, 0.4);
            transform: translateY(-4px);
            box-shadow: var(--shadow-gold);
        }

        .cover-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid rgba(255, 215, 0, 0.15);
        }

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

        .cover-card h3 {
            font-size: 1.05rem;
            font-weight: 800;
            margin-bottom: 8px;
        }

        .cover-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Comparison table */
        .comparison-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            background: rgba(18, 62, 37, 0.5);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid rgba(255, 215, 0, 0.15);
        }

        .comparison-table th, .comparison-table td {
            padding: 18px 20px;
            text-align: left;
            border-bottom: 1px solid rgba(255, 215, 0, 0.1);
            font-size: 0.9rem;
        }

        .comparison-table th {
            background: rgba(255, 215, 0, 0.1);
            color: var(--primary);
            font-weight: 800;
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 0.03em;
        }

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

        .comparison-table td:first-child {
            font-weight: 700;
            color: var(--mint);
        }

        .badge-hot {
            display: inline-block;
            padding: 4px 12px;
            background: var(--secondary);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 800;
            border-radius: 50px;
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }

        .badge-new {
            display: inline-block;
            padding: 4px 12px;
            background: #FF6B00;
            color: #fff;
            font-size: 0.7rem;
            font-weight: 800;
            border-radius: 50px;
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }

        /* Timeline */
        .timeline {
            position: relative;
            padding-left: 32px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: rgba(255, 215, 0, 0.25);
            border-radius: 1px;
        }

        .timeline-item {
            position: relative;
            padding-bottom: 32px;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -28px;
            top: 6px;
            width: 14px;
            height: 14px;
            background: var(--primary);
            border-radius: 50%;
            border: 3px solid var(--dark);
            box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.3);
        }

        .timeline-item .time {
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.02em;
            margin-bottom: 6px;
        }

        .timeline-item h4 {
            font-size: 1.05rem;
            font-weight: 800;
            margin-bottom: 6px;
        }

        .timeline-item p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: rgba(18, 62, 37, 0.5);
            border: 1px solid rgba(255, 215, 0, 0.12);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(255, 215, 0, 0.3);
        }

        .faq-question {
            width: 100%;
            padding: 18px 22px;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 700;
            text-align: left;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: color var(--transition);
        }

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

        .faq-question i {
            font-size: 0.85rem;
            color: var(--primary);
            transition: transform var(--transition);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            padding: 0 22px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

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

        .faq-answer p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* Form */
        .form-section {
            background: rgba(18, 62, 37, 0.7);
            border: 1px solid rgba(255, 215, 0, 0.2);
            border-radius: var(--radius-lg);
            padding: 48px;
            position: relative;
            overflow: hidden;
        }

        .form-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(255, 215, 0, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--mint);
            margin-bottom: 8px;
        }

        .form-group input, .form-group textarea, .form-group select {
            width: 100%;
            padding: 14px 18px;
            background: rgba(10, 46, 28, 0.8);
            border: 1px solid rgba(255, 215, 0, 0.2);
            border-radius: var(--radius-sm);
            color: var(--text-white);
            font-size: 0.95rem;
            transition: all var(--transition);
        }

        .form-group input:focus, .form-group textarea:focus, .form-group select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.15);
        }

        .form-group input::placeholder, .form-group textarea::placeholder {
            color: rgba(163, 184, 172, 0.6);
        }

        .btn-submit {
            width: 100%;
            padding: 16px;
            font-size: 1rem;
            font-weight: 800;
            color: var(--dark);
            background: var(--primary);
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 6px 20px rgba(255, 215, 0, 0.3);
        }

        .btn-submit:hover {
            background: #FFE44D;
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(255, 215, 0, 0.4);
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 24px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            background: rgba(10, 46, 28, 0.9);
            border: 2px solid var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0.7;
            transition: all var(--transition);
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            animation: floatFAB 3s ease-in-out infinite;
            position: fixed;
        }

        .fab-left:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 8px 28px rgba(255, 215, 0, 0.45);
        }

        .fab-left:active {
            transform: scale(0.95) translateY(2px);
        }

        .fab-left i {
            font-size: 1.4rem;
            color: var(--primary);
            transition: transform 0.5s;
        }

        .fab-left:hover i {
            transform: rotate(360deg);
        }

        .fab-left .notification-dot {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 14px;
            height: 14px;
            background: #D32F2F;
            border: 2px solid var(--dark);
            border-radius: 50%;
            animation: blinkDot 1.8s ease-in-out infinite;
        }

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

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

        /* Footer */
        .footer {
            background: #062015;
            border-top: 1px solid rgba(255, 215, 0, 0.15);
            padding: 56px 0 28px;
        }

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

        .footer-brand h3 {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 14px;
            line-height: 1.4;
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            list-style: none;
        }

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

        .footer-col ul li a {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: color var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 215, 0, 0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        .footer-bottom p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

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

        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            background: rgba(255, 215, 0, 0.08);
            border: 1px solid rgba(255, 215, 0, 0.2);
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--primary);
        }

        /* Payment badges */
        .payment-badges {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: center;
        }

        .payment-badge {
            padding: 8px 18px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 215, 0, 0.2);
            border-radius: 8px;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--mint);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .card-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero h1 {
                font-size: 2.4rem;
            }
        }

        @media (max-width: 768px) {
            .section-padding {
                padding: 48px 0;
            }
            .hero {
                padding-top: 100px;
                padding-bottom: 48px;
                min-height: auto;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .nav-links {
                display: none;
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(10, 46, 28, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 24px;
                gap: 16px;
                border-bottom: 1px solid rgba(255, 215, 0, 0.2);
                z-index: 49;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-auth {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .logo {
                max-width: 240px;
                font-size: 0.95rem;
            }
            .card-grid-3, .card-grid-2, .card-grid-4 {
                grid-template-columns: 1fr;
            }
            .hero-stats {
                gap: 20px;
            }
            .form-section {
                padding: 28px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .comparison-table th, .comparison-table td {
                padding: 12px 14px;
                font-size: 0.8rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero h1 {
                font-size: 1.7rem;
            }
            .hero-cta-group {
                flex-direction: column;
            }
            .btn-primary-hero, .btn-outline-hero {
                width: 100%;
                justify-content: center;
            }
            .section-header h2 {
                font-size: 1.7rem;
            }
            .nav-auth {
                gap: 8px;
            }
            .btn-login, .btn-signup {
                padding: 8px 14px;
                font-size: 0.75rem;
            }
            .fab-left {
                left: 16px;
                bottom: 80px;
                width: 48px;
                height: 48px;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #0B1A30;
            --bg-secondary: #0F0C20;
            --bg-card: #121F38;
            --accent-lime: #CCFF00;
            --accent-cyan: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --text-muted: #7A8085;
            --border-glow: rgba(0, 240, 255, 0.35);
            --border-lime: rgba(204, 255, 0, 0.45);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-neon: 0 0 20px rgba(0, 240, 255, 0.25);
            --shadow-lime: 0 0 25px rgba(204, 255, 0, 0.2);
            --font-sans: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-sans);
            background: linear-gradient(160deg, var(--bg-secondary) 0%, var(--bg-primary) 55%, #0A1525 100%);
            color: var(--text-primary);
            line-height: 1.65;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

        button, input, textarea, select {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
        }

        button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-narrow {
            max-width: 820px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== HEADER / NAV ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 26, 48, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            transition: background var(--transition-smooth);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            gap: 24px;
        }

        .logo-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            max-width: 360px;
        }

        .logo-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0B1A30;
            font-size: 1.25rem;
            font-weight: 800;
            flex-shrink: 0;
            box-shadow: var(--shadow-neon);
        }

        .logo-text {
            font-size: 0.9rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }

        .logo-text span {
            color: var(--accent-lime);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            flex-wrap: wrap;
        }

        .nav-links a {
            display: inline-block;
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-links a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
        }

        .nav-links a.active {
            color: var(--bg-primary);
            background: var(--accent-lime);
            box-shadow: var(--shadow-lime);
        }

        .nav-cta-group {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .btn-login {
            padding: 8px 18px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 20px;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
        }

        .btn-signup {
            padding: 8px 20px;
            font-size: 0.875rem;
            font-weight: 700;
            color: #0B1A30;
            background: linear-gradient(135deg, var(--accent-lime), #B8E600);
            border: none;
            border-radius: 20px;
            cursor: pointer;
            box-shadow: var(--shadow-lime);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-signup:hover {
            transform: translateY(-1px);
            box-shadow: 0 0 30px rgba(204, 255, 0, 0.35);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 8px;
            width: 44px;
            height: 44px;
            cursor: pointer;
            color: var(--text-primary);
            font-size: 1.25rem;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
        }

        .mobile-toggle:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(11, 26, 48, 0.98);
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            padding: 16px 24px;
            gap: 8px;
        }

        .mobile-menu.active {
            display: flex;
        }

        .mobile-menu a {
            padding: 12px 16px;
            border-radius: 12px;
            font-weight: 600;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
        }

        .mobile-menu a:hover {
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-cyan);
        }

        .mobile-menu a.active {
            background: var(--accent-lime);
            color: #0B1A30;
        }

        .mobile-menu .nav-cta-group {
            display: flex;
            gap: 12px;
            padding-top: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        /* ===== ARTICLE CONTENT ===== */
        .article-page {
            padding: 48px 0 72px;
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 28px;
            flex-wrap: wrap;
        }

        .article-breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

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

        .article-breadcrumb .separator {
            color: rgba(255, 255, 255, 0.2);
        }

        .article-header {
            margin-bottom: 36px;
        }

        .article-category-tag {
            display: inline-block;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            background: rgba(0, 240, 255, 0.12);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 240, 255, 0.25);
            margin-bottom: 16px;
        }

        .article-title {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 20px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--text-muted);
            padding-bottom: 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .article-meta i {
            color: var(--accent-cyan);
            margin-right: 6px;
        }

        .article-meta-item {
            display: inline-flex;
            align-items: center;
        }

        .article-featured-image {
            margin-bottom: 36px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
            border: 1px solid rgba(0, 240, 255, 0.15);
        }

        .article-featured-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        .article-body {
            font-size: 1.05rem;
            line-height: 1.7;
            color: #D1D5DB;
        }

        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 36px 0 16px;
            line-height: 1.3;
        }

        .article-body h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 28px 0 12px;
            line-height: 1.35;
        }

        .article-body p {
            margin-bottom: 18px;
        }

        .article-body ul, .article-body ol {
            margin: 16px 0 20px 24px;
            padding-left: 16px;
        }

        .article-body ul {
            list-style-type: disc;
        }

        .article-body ol {
            list-style-type: decimal;
        }

        .article-body li {
            margin-bottom: 10px;
            color: #D1D5DB;
        }

        .article-body li::marker {
            color: var(--accent-cyan);
        }

        .article-body blockquote {
            border-left: 4px solid var(--accent-lime);
            padding: 16px 20px;
            margin: 24px 0;
            background: rgba(204, 255, 0, 0.05);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            font-style: italic;
            color: #E5E7EB;
        }

        .article-body a {
            color: var(--accent-cyan);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-body a:hover {
            color: var(--accent-lime);
        }

        .article-body strong {
            color: var(--text-primary);
            font-weight: 700;
        }

        .article-body img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 24px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .article-not-found i {
            font-size: 3rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .article-not-found h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .article-not-found p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .btn-back-home {
            display: inline-block;
            padding: 12px 28px;
            border-radius: 24px;
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent-lime), #B8E600);
            color: #0B1A30;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-lime);
        }

        .btn-back-home:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 35px rgba(204, 255, 0, 0.35);
            color: #0B1A30;
        }

        /* ===== ARTICLE SIDEBAR ===== */
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 48px;
            align-items: start;
        }

        .article-sidebar {
            position: sticky;
            top: 100px;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .sidebar-widget {
            background: rgba(18, 31, 56, 0.6);
            border: 1px solid rgba(0, 240, 255, 0.12);
            border-radius: var(--radius-md);
            padding: 24px;
        }

        .sidebar-widget h4 {
            font-size: 0.9rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--accent-cyan);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .sidebar-widget ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .sidebar-widget ul li a {
            display: block;
            padding: 8px 12px;
            border-radius: 8px;
            font-size: 0.875rem;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
        }

        .sidebar-widget ul li a:hover {
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-cyan);
        }

        .sidebar-widget ul li a i {
            margin-right: 8px;
            font-size: 0.75rem;
            color: var(--accent-lime);
        }

        .sidebar-cta {
            background: linear-gradient(135deg, rgba(204, 255, 0, 0.12), rgba(0, 240, 255, 0.08));
            border: 1px solid var(--border-lime);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
        }

        .sidebar-cta h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .sidebar-cta p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }

        .btn-sidebar-cta {
            display: inline-block;
            width: 100%;
            padding: 10px 20px;
            border-radius: 20px;
            font-weight: 700;
            font-size: 0.9rem;
            background: linear-gradient(135deg, var(--accent-lime), #B8E600);
            color: #0B1A30;
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .btn-sidebar-cta:hover {
            transform: translateY(-1px);
            box-shadow: var(--shadow-lime);
            color: #0B1A30;
        }

        /* ===== FAB ===== */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 90;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(11, 26, 48, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0.7;
            transition: all var(--transition-smooth);
            animation: fabBreathing 3s ease-in-out infinite;
            position: fixed;
        }

        .fab::before {
            content: '';
            position: absolute;
            inset: -3px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan), var(--accent-lime));
            z-index: -1;
            opacity: 0.6;
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.08);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.6);
        }

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

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

        .fab:hover i {
            color: var(--accent-lime);
            transform: rotate(360deg);
        }

        .fab .notification-dot {
            position: absolute;
            top: 2px;
            right: 2px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: #FF007F;
            border: 2px solid #0B1A30;
            animation: notificationBlink 2s ease-in-out infinite;
        }

        @keyframes fabBreathing {
            0%, 100% { box-shadow: 0 0 20px rgba(0, 240, 255, 0.4); }
            50% { box-shadow: 0 0 30px rgba(0, 240, 255, 0.6); }
        }

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

        /* ===== FOOTER ===== */
        .footer {
            background: rgba(9, 16, 30, 0.95);
            border-top: 1px solid rgba(0, 240, 255, 0.12);
            padding: 56px 0 24px;
            margin-top: 48px;
        }

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

        .footer-brand h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }

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

        .footer-col ul li a {
            font-size: 0.85rem;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-bottom p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .footer-badges {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 12px;
            border-radius: 16px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid rgba(0, 240, 255, 0.2);
            color: var(--text-secondary);
        }

        .footer-badge i {
            color: var(--accent-lime);
            font-size: 0.8rem;
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

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

        @media (max-width: 768px) {
            .header-inner {
                min-height: 64px;
                gap: 16px;
            }

            .nav-links {
                display: none;
            }

            .mobile-toggle {
                display: flex;
            }

            .nav-cta-group {
                display: none;
            }

            .mobile-menu .nav-cta-group {
                display: flex;
            }

            .logo-text {
                font-size: 0.78rem;
                max-width: 220px;
            }

            .article-page {
                padding: 32px 0 48px;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

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

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }

            .fab {
                width: 48px;
                height: 48px;
                left: 12px;
                bottom: 80px;
            }

            .fab i {
                font-size: 1.25rem;
            }
        }

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

            .container-narrow {
                padding: 0 16px;
            }

            .logo-icon {
                width: 36px;
                height: 36px;
                font-size: 1rem;
                border-radius: 10px;
            }

            .logo-text {
                font-size: 0.7rem;
                max-width: 170px;
            }

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

            .article-body {
                font-size: 0.95rem;
            }

            .article-meta {
                gap: 10px;
                font-size: 0.78rem;
            }

            .article-breadcrumb {
                font-size: 0.72rem;
            }
        }

/* roulang page: category1 */
:root {
            --color-bg-primary: #0F0C20;
            --color-bg-secondary: #0B1A30;
            --color-bg-tertiary: #151029;
            --color-accent-lime: #CCFF00;
            --color-accent-cyan: #00F0FF;
            --color-accent-pink: #FF007F;
            --color-text-primary: #FFFFFF;
            --color-text-secondary: #A6ACAF;
            --color-text-muted: #6B7280;
            --color-border: #1F2937;
            --color-border-hover: #00F0FF;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
            --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
            --shadow-glow-cyan: 0 0 15px rgba(0,240,255,0.5);
            --shadow-glow-lime: 0 0 15px rgba(204,255,0,0.5);
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.5s ease;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', 'Roboto', system-ui, -apple-system, sans-serif;
            background: var(--color-bg-primary);
            color: var(--color-text-primary);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        
        /* ============ HEADER / NAV ============ */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: rgba(15,12,32,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255,255,255,0.08);
            transition: background var(--transition-base);
        }
        
        .header.scrolled {
            background: rgba(15,12,32,0.98);
            border-bottom-color: rgba(0,240,255,0.2);
        }
        
        .nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }
        
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            min-width: 0;
        }
        
        .nav-logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-lime));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-bg-primary);
            font-size: 18px;
            flex-shrink: 0;
        }
        
        .nav-logo-text {
            font-size: 14px;
            font-weight: 700;
            color: var(--color-text-primary);
            line-height: 1.3;
            letter-spacing: 0.02em;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 280px;
        }
        
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            flex: 1;
            justify-content: center;
        }
        
        .nav-links li a {
            display: inline-block;
            padding: 8px 14px;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-text-secondary);
            border-radius: 20px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        
        .nav-links li a:hover {
            color: var(--color-text-primary);
            background: rgba(255,255,255,0.06);
        }
        
        .nav-links li a.active {
            color: var(--color-accent-cyan);
            background: rgba(0,240,255,0.1);
            border: 1px solid rgba(0,240,255,0.25);
        }
        
        .nav-auth {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        
        .btn-login {
            padding: 8px 16px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-text-primary);
            background: transparent;
            border: 1px solid rgba(255,255,255,0.2);
            border-radius: 20px;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        
        .btn-login:hover {
            border-color: var(--color-accent-cyan);
            color: var(--color-accent-cyan);
        }
        
        .btn-signup {
            padding: 8px 18px;
            font-size: 13px;
            font-weight: 700;
            color: var(--color-bg-primary);
            background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-lime));
            border: none;
            border-radius: 20px;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 2px 8px rgba(0,240,255,0.3);
        }
        
        .btn-signup:hover {
            box-shadow: 0 4px 16px rgba(0,240,255,0.5);
            transform: translateY(-1px);
        }
        
        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--color-text-primary);
            font-size: 22px;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }
        
        .nav-toggle:hover {
            background: rgba(255,255,255,0.06);
        }
        
        /* ============ HERO ============ */
        .hero {
            position: relative;
            min-height: 680px;
            display: flex;
            align-items: center;
            padding-top: 72px;
            overflow: hidden;
            background: var(--color-bg-primary);
        }
        
        .hero-video-bg {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.35;
            pointer-events: none;
        }
        
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15,12,32,0.6) 0%, rgba(15,12,32,0.85) 60%, var(--color-bg-primary) 100%);
        }
        
        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 720px;
        }
        
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            background: rgba(0,240,255,0.12);
            border: 1px solid rgba(0,240,255,0.3);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            color: var(--color-accent-cyan);
            letter-spacing: 0.04em;
            text-transform: uppercase;
            margin-bottom: 20px;
        }
        
        .hero h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--color-text-primary);
            margin-bottom: 20px;
            letter-spacing: -0.01em;
        }
        
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-lime));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .hero-desc {
            font-size: 16px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: 28px;
            max-width: 600px;
        }
        
        .hero-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }
        
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            font-size: 15px;
            font-weight: 700;
            color: var(--color-bg-primary);
            background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-lime));
            border: none;
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(0,240,255,0.35);
        }
        
        .btn-primary:hover {
            box-shadow: 0 6px 24px rgba(0,240,255,0.55);
            transform: translateY(-2px);
        }
        
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text-primary);
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(255,255,255,0.2);
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all var(--transition-fast);
        }
        
        .btn-outline:hover {
            border-color: var(--color-accent-cyan);
            color: var(--color-accent-cyan);
            background: rgba(0,240,255,0.08);
        }
        
        .hero-stats {
            display: flex;
            gap: 32px;
            margin-top: 36px;
            flex-wrap: wrap;
        }
        
        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        
        .hero-stat-number {
            font-size: 24px;
            font-weight: 800;
            color: var(--color-accent-cyan);
            line-height: 1.2;
        }
        
        .hero-stat-label {
            font-size: 12px;
            color: var(--color-text-muted);
            font-weight: 500;
        }
        
        /* ============ MAIN CONTENT SECTIONS ============ */
        .section {
            padding: 64px 0;
        }
        
        .section-alt {
            background: var(--color-bg-secondary);
        }
        
        .section-header {
            margin-bottom: 36px;
        }
        
        .section-header h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text-primary);
            line-height: 1.3;
            margin-bottom: 12px;
        }
        
        .section-header p {
            font-size: 15px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            max-width: 640px;
        }
        
        .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            color: var(--color-accent-lime);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 8px;
        }
        
        /* ============ CONTENT BLOCKS ============ */
        .content-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            margin-bottom: 48px;
        }
        
        .content-block.reverse {
            direction: rtl;
        }
        
        .content-block.reverse > * {
            direction: ltr;
        }
        
        .content-block-text h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text-primary);
            margin-bottom: 12px;
            line-height: 1.35;
        }
        
        .content-block-text p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        
        .content-block-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            position: relative;
            box-shadow: var(--shadow-lg);
        }
        
        .content-block-image img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        
        .content-block-image:hover img {
            transform: scale(1.03);
        }
        
        /* ============ STEP LIST ============ */
        .step-list {
            list-style: none;
            counter-reset: step-counter;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        
        .step-list li {
            counter-increment: step-counter;
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 16px 20px;
            background: rgba(255,255,255,0.04);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
        }
        
        .step-list li:hover {
            border-color: rgba(0,240,255,0.3);
            background: rgba(0,240,255,0.05);
        }
        
        .step-list li::before {
            content: counter(step-counter);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-lime));
            color: var(--color-bg-primary);
            font-weight: 800;
            font-size: 14px;
            border-radius: 50%;
            flex-shrink: 0;
        }
        
        .step-list-content h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-text-primary);
            margin-bottom: 4px;
        }
        
        .step-list-content p {
            font-size: 13px;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }
        
        /* ============ BENEFIT GRID ============ */
        .benefit-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        
        .benefit-item {
            padding: 24px;
            background: rgba(255,255,255,0.04);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
        }
        
        .benefit-item:hover {
            border-color: rgba(0,240,255,0.25);
            box-shadow: var(--shadow-glow-cyan);
            transform: translateY(-2px);
        }
        
        .benefit-icon {
            width: 40px;
            height: 40px;
            background: rgba(0,240,255,0.1);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-accent-cyan);
            font-size: 18px;
            margin-bottom: 12px;
        }
        
        .benefit-item h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-text-primary);
            margin-bottom: 8px;
        }
        
        .benefit-item p {
            font-size: 13px;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }
        
        /* ============ TABLE ============ */
        .table-wrapper {
            overflow-x: auto;
            border-radius: var(--radius-md);
            border: 1px solid rgba(255,255,255,0.1);
        }
        
        .custom-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 13px;
        }
        
        .custom-table thead {
            background: rgba(0,240,255,0.08);
        }
        
        .custom-table th {
            padding: 12px 16px;
            text-align: left;
            font-weight: 700;
            color: var(--color-accent-cyan);
            border-bottom: 1px solid rgba(255,255,255,0.1);
            white-space: nowrap;
        }
        
        .custom-table td {
            padding: 12px 16px;
            color: var(--color-text-secondary);
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        
        .custom-table tbody tr:hover {
            background: rgba(255,255,255,0.04);
        }
        
        /* ============ FAQ ============ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        
        .faq-item {
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: var(--radius-md);
            overflow: hidden;
            background: rgba(255,255,255,0.03);
            transition: all var(--transition-fast);
        }
        
        .faq-item:hover {
            border-color: rgba(0,240,255,0.25);
        }
        
        .faq-question {
            width: 100%;
            padding: 16px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            background: transparent;
            border: none;
            cursor: pointer;
            color: var(--color-text-primary);
            font-size: 14px;
            font-weight: 600;
            text-align: left;
            transition: all var(--transition-fast);
        }
        
        .faq-question:hover {
            color: var(--color-accent-cyan);
        }
        
        .faq-icon {
            flex-shrink: 0;
            font-size: 14px;
            color: var(--color-accent-cyan);
            transition: transform var(--transition-fast);
        }
        
        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }
        
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow);
        }
        
        .faq-answer-inner {
            padding: 0 20px 16px;
            font-size: 13px;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }
        
        /* ============ CTA BANNER ============ */
        .cta-banner {
            background: linear-gradient(135deg, rgba(0,240,255,0.08), rgba(204,255,0,0.06));
            border: 1px solid rgba(0,240,255,0.2);
            border-radius: var(--radius-lg);
            padding: 40px;
            text-align: left;
            position: relative;
            overflow: hidden;
        }
        
        .cta-banner h3 {
            font-size: 24px;
            font-weight: 800;
            color: var(--color-text-primary);
            margin-bottom: 8px;
            line-height: 1.35;
        }
        
        .cta-banner p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: 20px;
            max-width: 520px;
        }
        
        /* ============ FLOATING ACTION BUTTON ============ */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(15,12,32,0.75);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(15,12,32,0.75), rgba(15,12,32,0.75)), linear-gradient(135deg, var(--color-accent-cyan), var(--color-accent-lime));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-accent-cyan);
            font-size: 22px;
            cursor: pointer;
            box-shadow: 0 0 15px rgba(0,240,255,0.4);
            transition: all var(--transition-fast);
            opacity: 0.7;
            animation: fabFloat 3s ease-in-out infinite;
        }
        
        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 24px rgba(0,240,255,0.6);
        }
        
        .fab:active {
            transform: scale(0.95);
            border-color: var(--color-accent-pink);
            color: var(--color-accent-pink);
        }
        
        .fab-notification {
            position: absolute;
            top: 4px;
            right: 4px;
            width: 10px;
            height: 10px;
            background: var(--color-accent-pink);
            border-radius: 50%;
            animation: fabBlink 1.2s ease-in-out infinite;
        }
        
        @keyframes fabFloat {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }
        
        @keyframes fabBlink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }
        
        /* ============ FOOTER ============ */
        .footer {
            background: var(--color-bg-secondary);
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 48px 0 24px;
        }
        
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        
        .footer-brand h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text-primary);
            margin-bottom: 12px;
            line-height: 1.4;
        }
        
        .footer-brand p {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.7;
            max-width: 400px;
        }
        
        .footer-col h4 {
            font-size: 13px;
            font-weight: 700;
            color: var(--color-text-primary);
            margin-bottom: 12px;
            letter-spacing: 0.03em;
        }
        
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        
        .footer-col ul li a {
            font-size: 13px;
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        
        .footer-col ul li a:hover {
            color: var(--color-accent-cyan);
        }
        
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.06);
            flex-wrap: wrap;
        }
        
        .footer-bottom p {
            font-size: 12px;
            color: var(--color-text-muted);
        }
        
        .footer-badges {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        
        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 12px;
            font-size: 11px;
            font-weight: 600;
            color: var(--color-text-secondary);
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: 16px;
        }
        
        .footer-badge i {
            color: var(--color-accent-cyan);
            font-size: 12px;
        }
        
        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 34px;
            }
            .benefit-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        
        @media (max-width: 768px) {
            .nav {
                height: 64px;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(15,12,32,0.98);
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li a {
                width: 100%;
                padding: 10px 14px;
            }
            .nav-toggle {
                display: block;
            }
            .nav-auth {
                gap: 6px;
            }
            .btn-login {
                padding: 7px 12px;
                font-size: 12px;
            }
            .btn-signup {
                padding: 7px 14px;
                font-size: 12px;
            }
            .hero {
                min-height: 560px;
                padding-top: 64px;
            }
            .hero h1 {
                font-size: 28px;
            }
            .hero-desc {
                font-size: 14px;
            }
            .hero-stats {
                gap: 20px;
            }
            .content-block {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .content-block.reverse {
                direction: ltr;
            }
            .content-block-image img {
                height: 220px;
            }
            .benefit-grid {
                grid-template-columns: 1fr;
            }
            .section {
                padding: 48px 0;
            }
            .cta-banner {
                padding: 28px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .fab {
                bottom: 80px;
                left: 12px;
                width: 48px;
                height: 48px;
                font-size: 20px;
            }
        }
        
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .nav-logo-text {
                font-size: 11px;
                max-width: 160px;
            }
            .hero h1 {
                font-size: 24px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-primary, .btn-outline {
                justify-content: center;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .cta-banner h3 {
                font-size: 20px;
            }
            .step-list li {
                padding: 12px 14px;
            }
            .step-list li::before {
                width: 28px;
                height: 28px;
                font-size: 12px;
            }
        }

/* roulang page: category2 */
:root {
            --color-bg: #0A2E1C;
            --color-bg-secondary: #123E25;
            --color-accent-gold: #FFD700;
            --color-accent-red: #D32F2F;
            --color-text-white: #FFFFFF;
            --color-text-mint: #D1F2EB;
            --color-text-muted: #A3C4BC;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
            --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.35);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.3);
            --transition-fast: 0.2s ease;
            --transition-med: 0.35s ease;
            --font-body: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: var(--font-body);
            background: var(--color-bg);
            color: var(--color-text-white);
            line-height: 1.65;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button, input {
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* Header */
        .header {
            background: rgba(10, 46, 28, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 215, 0, 0.2);
            position: sticky;
            top: 0;
            z-index: 50;
            transition: background var(--transition-med);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            font-weight: 800;
            font-size: 1.2rem;
            line-height: 1.3;
            color: var(--color-accent-gold);
            letter-spacing: 0.3px;
            max-width: 320px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }
        .nav-links a {
            display: inline-block;
            padding: 10px 18px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.92rem;
            color: var(--color-text-mint);
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }
        .nav-links a:hover,
        .nav-links a:focus {
            color: var(--color-accent-gold);
            background: rgba(255, 215, 0, 0.1);
            border-color: rgba(255, 215, 0, 0.3);
            outline: none;
        }
        .nav-links a.active {
            color: var(--color-bg);
            background: var(--color-accent-gold);
            border-color: var(--color-accent-gold);
            font-weight: 700;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-login {
            padding: 10px 18px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--color-text-white);
            border: 1px solid rgba(255, 255, 255, 0.3);
            transition: all var(--transition-fast);
            background: transparent;
        }
        .btn-login:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--color-text-white);
        }
        .btn-signup {
            padding: 10px 22px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.9rem;
            background: var(--color-accent-gold);
            color: var(--color-bg);
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-gold);
        }
        .btn-signup:hover {
            background: #FFE44D;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(255, 215, 0, 0.5);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: 1px solid rgba(255, 215, 0, 0.4);
            color: var(--color-accent-gold);
            padding: 8px 12px;
            border-radius: 8px;
            font-size: 1.2rem;
            cursor: pointer;
        }
        /* Hero */
        .hero {
            background-image: linear-gradient(rgba(10, 46, 28, 0.85), rgba(18, 62, 37, 0.9)), url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            padding: 90px 0 70px;
            border-bottom: 1px solid rgba(255, 215, 0, 0.15);
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255, 215, 0, 0.15);
            border: 1px solid rgba(255, 215, 0, 0.4);
            color: var(--color-accent-gold);
            padding: 6px 16px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.82rem;
            letter-spacing: 0.5px;
            margin-bottom: 22px;
        }
        .hero h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            font-weight: 800;
            color: var(--color-text-white);
            margin-bottom: 20px;
        }
        .hero h1 span {
            color: var(--color-accent-gold);
        }
        .hero-sub {
            font-size: 1.15rem;
            color: var(--color-text-mint);
            margin-bottom: 30px;
            max-width: 560px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 30px;
        }
        .btn-primary {
            padding: 14px 32px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1rem;
            background: var(--color-accent-gold);
            color: var(--color-bg);
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-gold);
            border: none;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-primary:hover {
            background: #FFE44D;
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(255, 215, 0, 0.55);
        }
        .btn-secondary {
            padding: 14px 28px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 1rem;
            background: transparent;
            color: var(--color-text-white);
            border: 2px solid rgba(255, 215, 0, 0.6);
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .btn-secondary:hover {
            background: rgba(255, 215, 0, 0.15);
            border-color: var(--color-accent-gold);
        }
        .hero-stats {
            display: flex;
            gap: 30px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: left;
        }
        .hero-stat strong {
            display: block;
            font-size: 1.8rem;
            color: var(--color-accent-gold);
            font-weight: 800;
        }
        .hero-stat span {
            font-size: 0.9rem;
            color: var(--color-text-muted);
        }
        .hero-visual {
            background: rgba(18, 62, 37, 0.7);
            border: 1px solid rgba(255, 215, 0, 0.3);
            border-radius: var(--radius-lg);
            padding: 30px;
            box-shadow: var(--shadow-md);
        }
        .hero-visual img {
            border-radius: var(--radius-md);
            margin-bottom: 20px;
            aspect-ratio: 16/9;
            object-fit: cover;
        }
        .hero-visual h3 {
            color: var(--color-accent-gold);
            font-size: 1.2rem;
            margin-bottom: 10px;
        }
        .hero-visual p {
            color: var(--color-text-mint);
            font-size: 0.95rem;
        }
        /* Section common */
        .section {
            padding: 70px 0;
        }
        .section-alt {
            background: var(--color-bg-secondary);
        }
        .section-label {
            display: inline-block;
            color: var(--color-accent-gold);
            font-weight: 700;
            font-size: 0.85rem;
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 2rem;
            line-height: 1.3;
            font-weight: 800;
            color: var(--color-text-white);
            margin-bottom: 16px;
            max-width: 700px;
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--color-text-muted);
            max-width: 650px;
            margin-bottom: 40px;
        }
        /* Steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .step-item {
            background: rgba(18, 62, 37, 0.6);
            border: 1px solid rgba(255, 215, 0, 0.2);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all var(--transition-med);
        }
        .step-item:hover {
            border-color: rgba(255, 215, 0, 0.6);
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }
        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-accent-gold);
            color: var(--color-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.3rem;
            margin-bottom: 18px;
        }
        .step-item h3 {
            font-size: 1.2rem;
            color: var(--color-text-white);
            margin-bottom: 10px;
        }
        .step-item p {
            color: var(--color-text-muted);
            font-size: 0.95rem;
        }
        /* Content Split */
        .split-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .split-image img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            aspect-ratio: 4/3;
            object-fit: cover;
        }
        .split-content h3 {
            font-size: 1.7rem;
            font-weight: 800;
            color: var(--color-text-white);
            margin-bottom: 18px;
        }
        .split-content p {
            color: var(--color-text-muted);
            margin-bottom: 16px;
            font-size: 1rem;
        }
        .split-content ul {
            list-style: none;
            margin-top: 10px;
        }
        .split-content ul li {
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            color: var(--color-text-mint);
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }
        .split-content ul li i {
            color: var(--color-accent-gold);
            margin-top: 4px;
        }
        /* Tips list */
        .tips-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .tip-item {
            display: flex;
            gap: 16px;
            background: rgba(18, 62, 37, 0.5);
            border-radius: var(--radius-md);
            padding: 22px;
            border-left: 4px solid var(--color-accent-gold);
            transition: all var(--transition-fast);
        }
        .tip-item:hover {
            background: rgba(18, 62, 37, 0.8);
            border-left-color: var(--color-accent-red);
        }
        .tip-icon {
            font-size: 1.5rem;
            color: var(--color-accent-gold);
            flex-shrink: 0;
        }
        .tip-item h4 {
            color: var(--color-text-white);
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .tip-item p {
            color: var(--color-text-muted);
            font-size: 0.92rem;
        }
        /* Comparison */
        .comparison-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .comparison-card {
            background: rgba(18, 62, 37, 0.7);
            border-radius: var(--radius-md);
            padding: 28px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all var(--transition-med);
            position: relative;
        }
        .comparison-card.featured {
            border: 2px solid var(--color-accent-gold);
            box-shadow: var(--shadow-gold);
        }
        .comparison-card.featured::after {
            content: "PHỔ BIẾN NHẤT";
            position: absolute;
            top: -14px;
            right: 20px;
            background: var(--color-accent-red);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }
        .comparison-card h3 {
            font-size: 1.2rem;
            color: var(--color-accent-gold);
            margin-bottom: 10px;
        }
        .comparison-card .price {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--color-text-white);
            margin-bottom: 16px;
        }
        .comparison-card ul {
            list-style: none;
            margin-bottom: 20px;
        }
        .comparison-card ul li {
            padding: 8px 0;
            color: var(--color-text-mint);
            font-size: 0.92rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .comparison-card ul li i {
            color: var(--color-accent-gold);
            font-size: 0.8rem;
        }
        /* CTA */
        .cta-banner {
            background: linear-gradient(135deg, rgba(255, 215, 0, 0.15), rgba(211, 47, 47, 0.2));
            border: 1px solid rgba(255, 215, 0, 0.4);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-banner h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-text-white);
            margin-bottom: 14px;
        }
        .cta-banner p {
            color: var(--color-text-mint);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto 28px;
        }
        /* FAQ */
        .faq-list {
            max-width: 800px;
        }
        .faq-item {
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
            padding: 20px 0;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--color-text-white);
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--color-accent-gold);
        }
        .faq-question i {
            transition: transform var(--transition-med);
            color: var(--color-accent-gold);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-med);
            color: var(--color-text-muted);
            font-size: 0.95rem;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-top: 12px;
        }
        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: #121212;
            border: 3px solid var(--color-accent-gold);
            color: var(--color-accent-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            cursor: pointer;
            box-shadow: var(--shadow-gold);
            transition: all var(--transition-fast);
            opacity: 0.7;
            animation: float 3s ease-in-out infinite;
        }
        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
        }
        .fab:active {
            transform: scale(0.95);
        }
        .fab::after {
            content: '';
            position: absolute;
            top: 3px;
            right: 3px;
            width: 10px;
            height: 10px;
            background: #FF0000;
            border-radius: 50%;
            border: 2px solid #121212;
        }
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }
        /* Footer */
        .footer {
            background: #071f13;
            border-top: 1px solid rgba(255, 215, 0, 0.2);
            padding: 50px 0 20px;
            margin-top: 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            color: var(--color-accent-gold);
            font-size: 1.1rem;
            margin-bottom: 14px;
            line-height: 1.4;
        }
        .footer-brand p {
            color: var(--color-text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .footer-col h4 {
            color: var(--color-text-white);
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 700;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--color-text-muted);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--color-accent-gold);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-bottom p {
            color: var(--color-text-muted);
            font-size: 0.85rem;
        }
        .footer-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 215, 0, 0.1);
            border: 1px solid rgba(255, 215, 0, 0.3);
            color: var(--color-accent-gold);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .hero h1 { font-size: 2.2rem; }
            .steps-grid, .comparison-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .header-inner { height: 64px; }
            .logo { font-size: 1rem; max-width: 220px; }
            .nav-links {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--color-bg);
                flex-direction: column;
                padding: 20px;
                gap: 6px;
                border-bottom: 1px solid rgba(255, 215, 0, 0.3);
            }
            .nav-links.open { display: flex; }
            .mobile-toggle { display: block; }
            .hero { padding: 50px 0 40px; }
            .hero-grid { grid-template-columns: 1fr; gap: 30px; }
            .hero h1 { font-size: 1.8rem; }
            .steps-grid, .comparison-grid, .split-grid, .tips-list { grid-template-columns: 1fr; }
            .section { padding: 50px 0; }
            .section-title { font-size: 1.5rem; }
            .footer-grid { grid-template-columns: 1fr; }
            .cta-banner { padding: 30px 20px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.5rem; }
            .hero-actions { flex-direction: column; }
            .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
            .header-actions .btn-login { display: none; }
            .header-actions .btn-signup { padding: 8px 16px; font-size: 0.8rem; }
            .fab { width: 48px; height: 48px; font-size: 1.2rem; left: 12px; bottom: 80px; }
        }