/* roulang page: index */
:root {
            --primary-bg: #0A0E1A;
            --secondary-bg: #10172A;
            --card-bg: rgba(16, 23, 42, 0.7);
            --card-border: rgba(0, 240, 255, 0.2);
            --accent-cyan: #00F0FF;
            --accent-blue: #0052FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --gold: #FFD700;
            --red-tag: #D32F2F;
            --border-radius: 16px;
            --border-radius-sm: 10px;
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
        }

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

        body {
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: var(--primary-bg);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            min-height: 100vh;
            background-image: 
                radial-gradient(ellipse at 20% 50%, rgba(0, 82, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(0, 240, 255, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(0, 82, 255, 0.05) 0%, transparent 50%);
        }

        /* Navbar */
        .navbar {
            background: rgba(10, 14, 26, 0.85) !important;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            padding: 12px 0;
            transition: all var(--transition-smooth);
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.3);
        }

        .navbar-brand {
            font-weight: 700;
            font-size: 1.3rem;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
        }

        .navbar-nav .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 18px !important;
            border-radius: 8px;
            transition: all var(--transition-fast);
            margin: 0 2px;
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 12px var(--accent-glow);
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 8px 22px;
            border-radius: 25px;
            font-weight: 600;
            transition: all var(--transition-fast);
        }

        .btn-login:hover {
            background: rgba(0, 240, 255, 0.15);
            box-shadow: 0 0 16px var(--accent-glow);
            color: var(--accent-cyan);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            color: #fff;
            padding: 9px 26px;
            border-radius: 25px;
            font-weight: 700;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.3);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.5);
            color: #fff;
        }

        /* Hero Section */
        .hero-section {
            position: relative;
            padding: 100px 0 80px;
            overflow: hidden;
            min-height: 85vh;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            background-attachment: fixed;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.88) 0%, rgba(16, 23, 42, 0.82) 50%, rgba(10, 14, 26, 0.9) 100%);
            z-index: 1;
        }

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

        .hero-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.15);
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 6px 20px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 24px;
            background: linear-gradient(135deg, #FFFFFF 0%, #00F0FF 50%, #0052FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 600px;
        }

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

        .btn-primary-glow {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            color: #fff;
            padding: 14px 36px;
            border-radius: 35px;
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: 0 6px 28px rgba(0, 240, 255, 0.35);
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.3px;
        }

        .btn-primary-glow:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 36px rgba(0, 240, 255, 0.55);
            color: #fff;
        }

        .btn-outline-glow {
            background: transparent;
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 14px 36px;
            border-radius: 35px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: all var(--transition-smooth);
        }

        .btn-outline-glow:hover {
            background: rgba(0, 240, 255, 0.12);
            box-shadow: 0 6px 24px var(--accent-glow);
            color: var(--accent-cyan);
        }

        .hero-visual {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-device-frame {
            background: var(--card-bg);
            backdrop-filter: blur(12px);
            border: 1px solid var(--card-border);
            border-radius: 24px;
            padding: 24px;
            box-shadow: var(--shadow-card), 0 0 40px rgba(0, 240, 255, 0.15);
            max-width: 420px;
        }

        .hero-device-frame img {
            border-radius: 16px;
            width: 100%;
            display: block;
        }

        /* Section Common */
        section {
            padding: 70px 0;
            position: relative;
        }

        .section-label {
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--accent-cyan);
            margin-bottom: 12px;
            display: block;
        }

        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text-primary);
            line-height: 1.3;
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 36px;
            max-width: 700px;
        }

        /* Glass Card */
        .glass-card {
            background: var(--card-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius);
            padding: 28px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            height: 100%;
        }

        .glass-card:hover {
            border-color: rgba(0, 240, 255, 0.45);
            box-shadow: 0 12px 40px rgba(0, 240, 255, 0.25);
            transform: translateY(-4px);
        }

        /* Offer Stair (优惠阶梯) */
        .offer-step {
            background: var(--card-bg);
            backdrop-filter: blur(12px);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius);
            padding: 32px 24px;
            position: relative;
            transition: all var(--transition-smooth);
            margin-bottom: 20px;
        }

        .offer-step:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 32px rgba(0, 240, 255, 0.3);
        }

        .offer-step-icon {
            font-size: 2.5rem;
            color: var(--accent-cyan);
            margin-bottom: 16px;
        }

        .offer-step h4 {
            font-weight: 700;
            margin-bottom: 8px;
            font-size: 1.3rem;
        }

        /* Table styles */
        .compare-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0 12px;
        }

        .compare-table th {
            background: var(--secondary-bg);
            color: var(--accent-cyan);
            font-weight: 700;
            padding: 16px 20px;
            border-bottom: 2px solid var(--accent-cyan);
        }

        .compare-table td {
            background: var(--card-bg);
            padding: 16px 20px;
            color: var(--text-secondary);
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }

        /* News List */
        .news-list-item {
            display: flex;
            gap: 20px;
            padding: 18px 0;
            border-bottom: 1px solid rgba(255,255,255,0.05);
            transition: all var(--transition-fast);
        }

        .news-list-item:hover {
            background: rgba(0, 240, 255, 0.03);
            padding-left: 12px;
            border-radius: 8px;
        }

        .news-list-item a {
            color: var(--text-primary);
            text-decoration: none;
            font-weight: 600;
            font-size: 1.05rem;
            transition: color var(--transition-fast);
        }

        .news-list-item a:hover {
            color: var(--accent-cyan);
        }

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

        /* FAB */
        .fab-container {
            position: fixed;
            left: 24px;
            bottom: 100px;
            z-index: 1050;
        }

        .fab-button {
            width: 56px;
            height: 56px;
            border-radius: 50px;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(14px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 20px var(--accent-glow);
            animation: fabPulse 2s ease-in-out infinite;
        }

        .fab-button::before {
            content: '';
            position: absolute;
            inset: -3px;
            border-radius: 50px;
            padding: 2px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask-composite: exclude;
            z-index: -1;
        }

        @keyframes fabPulse {
            0%, 100% { box-shadow: 0 0 20px var(--accent-glow); }
            50% { box-shadow: 0 0 40px rgba(0, 240, 255, 0.8); }
        }

        .fab-button:hover {
            transform: scale(1.15);
            box-shadow: 0 0 48px rgba(0, 240, 255, 0.9);
        }

        .fab-icon {
            font-size: 1.6rem;
            color: #fff;
        }

        /* Footer */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid rgba(0, 240, 255, 0.2);
            padding: 50px 0 30px;
            color: var(--text-muted);
        }

        .footer-brand {
            font-weight: 700;
            font-size: 1.4rem;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .footer-links a {
            color: var(--text-secondary);
            text-decoration: none;
            margin-right: 24px;
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }

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

        .trust-badge {
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: 8px;
            padding: 8px 16px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-block;
            margin-top: 12px;
        }

        /* Responsive */
        @media (max-width: 992px) {
            .hero-title {
                font-size: 2.4rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .hero-section {
                padding: 80px 0 60px;
                min-height: auto;
            }
        }

        @media (max-width: 768px) {
            section {
                padding: 48px 0;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-visual {
                margin-top: 30px;
            }
            .compare-table {
                font-size: 0.8rem;
            }
            .fab-container {
                left: 16px;
                bottom: 90px;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .btn-primary-glow, .btn-outline-glow {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .navbar-brand {
                font-size: 1.1rem;
            }
        }

/* roulang page: article */
/* ========== DESIGN SYSTEM ========== */
        :root {
            --primary-bg: #0A0E1A;
            --secondary-bg: #10172A;
            --card-bg: rgba(16, 23, 42, 0.7);
            --card-border: rgba(0, 240, 255, 0.2);
            --accent-cyan: #00F0FF;
            --accent-blue: #0052FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --gold: #FFD700;
            --red-tag: #D32F2F;
            --border-radius: 16px;
            --border-radius-sm: 10px;
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
            --font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: var(--font-family);
            background: var(--primary-bg);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            min-height: 100vh;
            background-image: 
                radial-gradient(ellipse at 20% 50%, rgba(0, 82, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(0, 240, 255, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(0, 82, 255, 0.05) 0%, transparent 50%);
        }
        
        a {
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        
        img {
            max-width: 100%;
            height: auto;
        }
        
        /* ========== NAVBAR ========== */
        .navbar {
            background: rgba(10, 14, 26, 0.85) !important;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            padding: 12px 0;
            transition: all var(--transition-smooth);
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.3);
            z-index: 1000;
        }
        
        .navbar-brand {
            font-weight: 700;
            font-size: 1.3rem;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
            padding: 0;
        }
        
        .navbar-toggler {
            border: 1px solid rgba(0, 240, 255, 0.3);
            padding: 4px 8px;
        }
        
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.2);
            outline: none;
        }
        
        .navbar-nav .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 18px !important;
            border-radius: 8px;
            transition: all var(--transition-fast);
            margin: 0 2px;
        }
        
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 12px var(--accent-glow);
        }
        
        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 8px 22px;
            border-radius: 25px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        
        .btn-login:hover {
            background: rgba(0, 240, 255, 0.15);
            box-shadow: 0 0 16px var(--accent-glow);
            color: var(--accent-cyan);
        }
        
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            color: #fff;
            padding: 9px 26px;
            border-radius: 25px;
            font-weight: 700;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.3);
            white-space: nowrap;
        }
        
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.5);
            color: #fff;
        }
        
        /* ========== ARTICLE CONTENT ========== */
        .article-wrapper {
            padding-top: 100px;
            padding-bottom: 60px;
        }
        
        .article-container {
            max-width: 860px;
            margin: 0 auto;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            padding: 48px 40px;
            box-shadow: var(--shadow-card);
        }
        
        .article-header {
            margin-bottom: 40px;
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
            padding-bottom: 32px;
        }
        
        .article-category-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.12);
            color: var(--accent-cyan);
            padding: 6px 18px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: 0.3px;
        }
        
        .article-title {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 18px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        
        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        
        .article-meta i {
            color: var(--accent-cyan);
            font-size: 0.85rem;
        }
        
        .article-body {
            font-size: 1.05rem;
            line-height: 1.8;
            color: var(--text-secondary);
        }
        
        .article-body h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-top: 40px;
            margin-bottom: 18px;
            padding-left: 16px;
            border-left: 4px solid var(--accent-cyan);
        }
        
        .article-body h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-top: 32px;
            margin-bottom: 14px;
        }
        
        .article-body p {
            margin-bottom: 20px;
        }
        
        .article-body ul,
        .article-body ol {
            margin-bottom: 24px;
            padding-left: 24px;
        }
        
        .article-body li {
            margin-bottom: 10px;
        }
        
        .article-body strong {
            color: var(--text-primary);
            font-weight: 600;
        }
        
        .article-body a {
            color: var(--accent-cyan);
            text-decoration: underline;
            text-underline-offset: 3px;
            font-weight: 500;
        }
        
        .article-body a:hover {
            color: var(--accent-blue);
        }
        
        .article-body blockquote {
            background: rgba(0, 240, 255, 0.05);
            border-left: 3px solid var(--accent-cyan);
            padding: 20px 24px;
            border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
            margin: 28px 0;
            font-style: italic;
            color: var(--text-secondary);
        }
        
        .article-body img {
            border-radius: var(--border-radius-sm);
            margin: 24px 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        
        .article-tags {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        
        .tag-item {
            display: inline-block;
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-cyan);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid rgba(0, 240, 255, 0.2);
            transition: all var(--transition-fast);
        }
        
        .tag-item:hover {
            background: rgba(0, 240, 255, 0.18);
            color: var(--accent-cyan);
        }
        
        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: 60px 0;
            text-align: center;
        }
        
        .cta-card {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.15), rgba(0, 240, 255, 0.08));
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: var(--border-radius);
            padding: 48px 40px;
            max-width: 700px;
            margin: 0 auto;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
        }
        
        .cta-card h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        
        .cta-card p {
            color: var(--text-secondary);
            margin-bottom: 24px;
            font-size: 1.05rem;
        }
        
        .btn-download-glow {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            color: #fff;
            padding: 16px 40px;
            border-radius: 35px;
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: 0 6px 28px rgba(0, 240, 255, 0.35);
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        
        .btn-download-glow:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 240, 255, 0.55);
            color: #fff;
        }
        
        .btn-download-outline {
            background: transparent;
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 14px 36px;
            border-radius: 35px;
            font-weight: 600;
            font-size: 1.05rem;
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        
        .btn-download-outline:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 20px var(--accent-glow);
            color: var(--accent-cyan);
        }
        
        /* ========== NOT FOUND ========== */
        .not-found-section {
            padding: 120px 0 80px;
            text-align: center;
        }
        
        .not-found-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius);
            padding: 60px 40px;
            max-width: 560px;
            margin: 0 auto;
            box-shadow: var(--shadow-card);
        }
        
        .not-found-card .icon-circle {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
            font-size: 2rem;
            color: var(--accent-cyan);
        }
        
        .not-found-card h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        
        .not-found-card p {
            color: var(--text-secondary);
            margin-bottom: 28px;
        }
        
        .btn-home {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            color: #fff;
            padding: 12px 32px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 18px rgba(0, 240, 255, 0.3);
        }
        
        .btn-home:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.5);
            color: #fff;
        }
        
        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            padding: 60px 0 30px;
            margin-top: 40px;
        }
        
        .footer-brand {
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        
        .site-footer .text-muted {
            color: var(--text-muted) !important;
            font-size: 0.9rem;
            line-height: 1.6;
        }
        
        .trust-badge {
            display: inline-block;
            background: rgba(255, 215, 0, 0.1);
            border: 1px solid rgba(255, 215, 0, 0.3);
            color: var(--gold);
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-top: 10px;
        }
        
        .footer-links a {
            display: block;
            color: var(--text-secondary);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: all var(--transition-fast);
        }
        
        .footer-links a:hover {
            color: var(--accent-cyan);
            padding-left: 4px;
        }
        
        .site-footer hr {
            border-color: rgba(255, 255, 255, 0.08);
            margin: 28px 0 20px;
        }
        
        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .article-container {
                padding: 36px 28px;
            }
            .article-title {
                font-size: 2.2rem;
            }
        }
        
        @media (max-width: 768px) {
            .navbar {
                padding: 10px 0;
            }
            .navbar-nav .nav-link {
                padding: 8px 14px !important;
                font-size: 0.9rem;
            }
            .d-flex.gap-2 {
                margin-top: 10px;
            }
            .article-wrapper {
                padding-top: 85px;
            }
            .article-container {
                padding: 28px 20px;
                border-radius: var(--border-radius-sm);
            }
            .article-title {
                font-size: 1.8rem;
            }
            .article-body {
                font-size: 0.98rem;
            }
            .article-body h2 {
                font-size: 1.5rem;
            }
            .article-body h3 {
                font-size: 1.2rem;
            }
            .cta-card {
                padding: 32px 24px;
            }
            .btn-download-glow,
            .btn-download-outline {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
            .btn-login,
            .btn-signup {
                padding: 7px 18px;
                font-size: 0.85rem;
            }
            .site-footer {
                padding: 40px 0 24px;
            }
        }
        
        @media (max-width: 520px) {
            .navbar-brand {
                font-size: 1.1rem;
            }
            .article-container {
                padding: 22px 16px;
            }
            .article-title {
                font-size: 1.5rem;
            }
            .article-meta {
                gap: 10px;
                font-size: 0.8rem;
            }
            .cta-card {
                padding: 24px 18px;
            }
            .cta-card h3 {
                font-size: 1.3rem;
            }
            .btn-download-glow {
                width: 100%;
                justify-content: center;
            }
            .btn-login,
            .btn-signup {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
        }
        
        /* ========== ANIMATIONS ========== */
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-4px); }
        }
        
        .floating-badge {
            animation: float 2.5s ease-in-out infinite;
        }

/* roulang page: category1 */
:root {
            --primary-bg: #0A0E1A;
            --secondary-bg: #10172A;
            --card-bg: rgba(16, 23, 42, 0.7);
            --card-border: rgba(0, 240, 255, 0.2);
            --accent-cyan: #00F0FF;
            --accent-blue: #0052FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --gold: #FFD700;
            --red-tag: #D32F2F;
            --border-radius: 16px;
            --border-radius-sm: 10px;
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: var(--primary-bg);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            min-height: 100vh;
            background-image: 
                radial-gradient(ellipse at 20% 50%, rgba(0, 82, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(0, 240, 255, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(0, 82, 255, 0.05) 0%, transparent 50%);
        }

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

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

        /* Navbar */
        .navbar {
            background: rgba(10, 14, 26, 0.85) !important;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            padding: 12px 0;
            transition: all var(--transition-smooth);
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.3);
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.3rem;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
        }
        .navbar-nav .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 18px !important;
            border-radius: 8px;
            transition: all var(--transition-fast);
            margin: 0 2px;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 12px var(--accent-glow);
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 8px 22px;
            border-radius: 25px;
            font-weight: 600;
            transition: all var(--transition-fast);
        }
        .btn-login:hover {
            background: rgba(0, 240, 255, 0.15);
            box-shadow: 0 0 16px var(--accent-glow);
            color: var(--accent-cyan);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            color: #fff;
            padding: 9px 26px;
            border-radius: 25px;
            font-weight: 700;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.3);
        }
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.5);
            color: #fff;
        }

        /* Page Banner */
        .page-banner {
            position: relative;
            padding: 120px 0 70px;
            overflow: hidden;
            background: url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
            background-attachment: fixed;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.9) 0%, rgba(16, 23, 42, 0.85) 100%);
            z-index: 1;
        }
        .page-banner-content {
            position: relative;
            z-index: 2;
        }
        .section-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.15);
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 6px 20px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 600;
            letter-spacing: 0.5px;
        }
        .page-title {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.15;
            margin: 24px 0;
            background: linear-gradient(135deg, #FFFFFF 0%, #00F0FF 50%, #0052FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 680px;
        }

        /* Coupon Wall Section */
        .coupon-wall-section {
            padding: 0 0 60px;
            position: relative;
            z-index: 3;
            margin-top: -30px;
        }
        .coupon-hero-card {
            background: linear-gradient(145deg, rgba(0, 240, 255, 0.12), rgba(0, 82, 255, 0.18));
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius);
            padding: 40px 30px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: var(--shadow-card), 0 0 30px rgba(0, 240, 255, 0.2);
            text-align: left;
            position: relative;
            overflow: hidden;
            transition: all var(--transition-smooth);
        }
        .coupon-hero-card::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(225deg, rgba(0, 240, 255, 0.08) 0%, transparent 50%, rgba(0, 82, 255, 0.08) 100%);
            pointer-events: none;
        }
        .coupon-hero-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 14px 45px rgba(0, 240, 255, 0.4);
            border-color: var(--accent-cyan);
        }
        .coupon-icon-big {
            font-size: 3rem;
            color: var(--gold);
            margin-bottom: 16px;
            filter: drop-shadow(0 0 12px rgba(255, 215, 0, 0.6));
        }
        .coupon-title-lg {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .coupon-value {
            font-size: 3.2rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--gold), #FFA500);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin: 12px 0;
            line-height: 1.1;
        }
        .coupon-detail {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.6;
            margin-bottom: 24px;
        }
        .coupon-code {
            background: rgba(0, 240, 255, 0.15);
            border: 1px dashed var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 10px 20px;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1.1rem;
            display: inline-block;
            letter-spacing: 1px;
            font-family: 'Courier New', monospace;
        }
        .btn-grab-coupon {
            background: linear-gradient(135deg, var(--gold), #FFA500);
            border: none;
            color: #1A1A1A;
            padding: 14px 36px;
            border-radius: 35px;
            font-weight: 800;
            font-size: 1.05rem;
            box-shadow: 0 6px 24px rgba(255, 215, 0, 0.4);
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-top: 16px;
        }
        .btn-grab-coupon:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(255, 215, 0, 0.65);
            color: #1A1A1A;
        }

        /* Coupon Grid */
        .coupon-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
            margin-top: 40px;
        }
        .coupon-mini-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-sm);
            padding: 28px 22px;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            transition: all var(--transition-smooth);
            text-align: left;
            position: relative;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .coupon-mini-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 24px rgba(0, 240, 255, 0.3);
            transform: translateY(-3px);
        }
        .coupon-mini-badge {
            position: absolute;
            top: 12px;
            right: 12px;
            background: var(--red-tag);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }
        .coupon-mini-icon {
            font-size: 2.2rem;
            color: var(--gold);
            margin-bottom: 14px;
        }
        .coupon-mini-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .coupon-mini-value {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-cyan);
            margin-bottom: 8px;
        }
        .coupon-mini-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* Promo Detail Sections */
        .promo-detail-section {
            padding: 60px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .promo-detail-section:nth-of-type(odd) {
            background: rgba(16, 23, 42, 0.4);
        }
        .promo-detail-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .promo-img-wrap {
            position: relative;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(0, 240, 255, 0.15);
        }
        .promo-img-wrap img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.5s ease;
        }
        .promo-img-wrap:hover img {
            transform: scale(1.04);
        }
        .promo-text h3 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .promo-text p {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .promo-highlights {
            list-style: none;
            padding: 0;
            margin: 0 0 20px;
        }
        .promo-highlights li {
            padding: 7px 0 7px 30px;
            position: relative;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        .promo-highlights li::before {
            content: '\f058';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 7px;
            color: var(--accent-cyan);
        }

        /* How to Claim Section */
        .claim-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 30px;
        }
        .claim-step {
            background: var(--card-bg);
            border: 1px solid rgba(0, 240, 255, 0.1);
            border-radius: var(--border-radius-sm);
            padding: 30px 20px;
            text-align: left;
            transition: all var(--transition-smooth);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .claim-step:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.25);
        }
        .step-number {
            display: inline-block;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            color: #fff;
            font-weight: 800;
            font-size: 1.2rem;
            line-height: 40px;
            text-align: center;
            margin-bottom: 16px;
        }
        .claim-step h5 {
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .claim-step p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 0;
        }

        /* FAQ Section */
        .faq-section {
            padding: 60px 0;
        }
        .accordion-item {
            background: var(--secondary-bg);
            border: 1px solid rgba(0, 240, 255, 0.1);
            margin-bottom: 12px;
            border-radius: var(--border-radius-sm) !important;
            overflow: hidden;
        }
        .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            padding: 18px 24px;
            box-shadow: none !important;
        }
        .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-cyan);
        }
        .accordion-button::after {
            filter: invert(0.7);
        }
        .accordion-body {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            padding: 0 24px 20px;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.2), rgba(0, 240, 255, 0.12));
            border-radius: var(--border-radius);
            padding: 60px 40px;
            margin: 50px 0 60px;
            text-align: left;
            border: 1px solid var(--card-border);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }
        .cta-section h3 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            margin-bottom: 24px;
        }

        /* Footer */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid rgba(0, 240, 255, 0.12);
            padding: 50px 0 30px;
            color: var(--text-muted);
        }
        .site-footer .footer-brand {
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
        }
        .site-footer a {
            color: var(--text-muted);
            display: block;
            padding: 4px 0;
            transition: color var(--transition-fast);
        }
        .site-footer a:hover {
            color: var(--accent-cyan);
        }
        .trust-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--accent-cyan);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-top: 10px;
        }

        /* Responsive */
        @media (max-width: 992px) {
            .promo-detail-grid {
                grid-template-columns: 1fr;
            }
            .claim-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .page-title {
                font-size: 2.3rem;
            }
            .coupon-value {
                font-size: 2.5rem;
            }
        }
        @media (max-width: 768px) {
            .coupon-grid {
                grid-template-columns: 1fr;
            }
            .claim-steps {
                grid-template-columns: 1fr;
            }
            .page-title {
                font-size: 1.9rem;
            }
            .coupon-hero-card {
                padding: 26px 20px;
            }
            .coupon-title-lg {
                font-size: 1.5rem;
            }
            .coupon-value {
                font-size: 2rem;
            }
            .cta-section {
                padding: 30px 20px;
            }
            .cta-section h3 {
                font-size: 1.7rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary-bg: #0A0E1A;
            --secondary-bg: #10172A;
            --card-bg: rgba(16, 23, 42, 0.7);
            --card-border: rgba(0, 240, 255, 0.2);
            --accent-cyan: #00F0FF;
            --accent-blue: #0052FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --gold: #FFD700;
            --red-tag: #D32F2F;
            --border-radius: 16px;
            --border-radius-sm: 10px;
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: var(--primary-bg);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            min-height: 100vh;
            background-image: 
                radial-gradient(ellipse at 20% 50%, rgba(0, 82, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(0, 240, 255, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(0, 82, 255, 0.05) 0%, transparent 50%);
        }

        /* Navbar */
        .navbar {
            background: rgba(10, 14, 26, 0.85) !important;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            padding: 12px 0;
            transition: all var(--transition-smooth);
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.3);
            z-index: 1030;
        }

        .navbar-brand {
            font-weight: 700;
            font-size: 1.3rem;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
        }

        .navbar-nav .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 18px !important;
            border-radius: 8px;
            transition: all var(--transition-fast);
            margin: 0 2px;
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 12px var(--accent-glow);
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 8px 22px;
            border-radius: 25px;
            font-weight: 600;
            transition: all var(--transition-fast);
        }

        .btn-login:hover {
            background: rgba(0, 240, 255, 0.15);
            box-shadow: 0 0 16px var(--accent-glow);
            color: var(--accent-cyan);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            color: #fff;
            padding: 9px 26px;
            border-radius: 25px;
            font-weight: 700;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.3);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.5);
            color: #fff;
        }

        .btn-primary-glow {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            color: #fff;
            padding: 14px 36px;
            border-radius: 35px;
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: 0 6px 28px rgba(0, 240, 255, 0.35);
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.3px;
            text-decoration: none;
        }

        .btn-primary-glow:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 36px rgba(0, 240, 255, 0.55);
            color: #fff;
        }

        .btn-outline-glow {
            background: transparent;
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 14px 36px;
            border-radius: 35px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }

        .btn-outline-glow:hover {
            background: rgba(0, 240, 255, 0.12);
            box-shadow: 0 8px 28px var(--accent-glow);
            color: var(--accent-cyan);
        }

        /* Category Page Hero */
        .cat-hero {
            position: relative;
            padding: 140px 0 80px;
            background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            background-attachment: fixed;
            overflow: hidden;
        }

        .cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.92) 0%, rgba(16, 23, 42, 0.85) 50%, rgba(10, 14, 26, 0.93) 100%);
            z-index: 1;
        }

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

        .section-badge {
            display: inline-block;
            background: rgba(255, 215, 0, 0.15);
            border: 1px solid var(--gold);
            color: var(--gold);
            padding: 6px 20px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .cat-title {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #FFFFFF 0%, #FFD700 50%, #FFA500 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .cat-desc {
            font-size: 1.15rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 720px;
        }

        /* Glass Cards */
        .glass-card {
            background: var(--card-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-card);
            padding: 32px;
            transition: all var(--transition-smooth);
            height: 100%;
        }

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

        /* Promotion Cards */
        .promo-card {
            background: var(--card-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius);
            padding: 28px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
            height: 100%;
        }

        .promo-card::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255, 215, 0, 0.05) 0%, transparent 70%);
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }

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

        .promo-card:hover {
            border-color: var(--gold);
            transform: translateY(-6px);
            box-shadow: 0 0 30px rgba(255, 215, 0, 0.2), 0 12px 40px rgba(0, 0, 0, 0.5);
        }

        .promo-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(255, 215, 0, 0.2), rgba(255, 165, 0, 0.2));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--gold);
            margin-bottom: 20px;
            border: 1px solid rgba(255, 215, 0, 0.35);
        }

        .promo-value {
            font-size: 2.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.1;
            margin-bottom: 8px;
        }

        .promo-tag {
            display: inline-block;
            background: var(--red-tag);
            color: #fff;
            padding: 3px 12px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }

        .promo-tag-new {
            background: var(--accent-cyan);
        }

        /* Feature List */
        .feature-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 16px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

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

        .feature-check {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 0.85rem;
            flex-shrink: 0;
            margin-top: 2px;
        }

        /* FAQ */
        .faq-section .accordion-button {
            background: var(--card-bg);
            color: var(--text-primary);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-sm) !important;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-fast);
        }

        .faq-section .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            border-color: var(--accent-cyan);
            box-shadow: 0 0 12px var(--accent-glow);
        }

        .faq-section .accordion-button:focus {
            box-shadow: 0 0 12px var(--accent-glow);
            border-color: var(--accent-cyan);
        }

        .faq-section .accordion-body {
            background: rgba(16, 23, 42, 0.5);
            border: 1px solid var(--card-border);
            border-top: 0;
            border-radius: 0 0 var(--border-radius-sm) var(--border-radius-sm);
            color: var(--text-secondary);
            padding: 20px 24px;
            line-height: 1.7;
        }

        /* CTA Section */
        .cta-section {
            position: relative;
            background: url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
            padding: 80px 0;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.9) 0%, rgba(0, 82, 255, 0.3) 50%, rgba(10, 14, 26, 0.9) 100%);
            z-index: 1;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        /* FAB */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1040;
            width: 56px;
            height: 56px;
            border-radius: 28px;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), linear-gradient(135deg, #00F0FF, #0052FF);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
            transition: all var(--transition-smooth);
            cursor: pointer;
            animation: floatFAB 3s ease-in-out infinite;
        }

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

        .fab-support:hover {
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.7);
            transform: scale(1.1);
            color: #fff;
        }

        .fab-support .fab-noti {
            position: absolute;
            top: 6px;
            right: 6px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: #FF007F;
            box-shadow: 0 0 8px #FF007F;
            animation: blink 1.2s ease-in-out infinite;
        }

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

        /* Footer */
        .site-footer {
            background: #080C16;
            border-top: 1px solid rgba(0, 240, 255, 0.12);
            padding: 60px 0 20px;
        }

        .footer-brand {
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .trust-badge {
            display: inline-block;
            background: rgba(255, 215, 0, 0.1);
            border: 1px solid var(--gold);
            color: var(--gold);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-top: 12px;
        }

        .footer-links a {
            display: block;
            color: var(--text-muted);
            text-decoration: none;
            padding: 4px 0;
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }

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

        /* Responsive */
        @media (max-width: 991.98px) {
            .cat-title {
                font-size: 2.4rem;
            }

            .promo-value {
                font-size: 2rem;
            }

            .cat-hero {
                padding: 120px 0 60px;
            }
        }

        @media (max-width: 767.98px) {
            .cat-title {
                font-size: 2rem;
            }

            .cat-desc {
                font-size: 1rem;
            }

            .glass-card {
                padding: 24px;
            }

            .promo-card {
                padding: 22px;
            }

            .fab-support {
                width: 50px;
                height: 50px;
                border-radius: 25px;
                left: 12px;
                bottom: 80px;
                font-size: 1.2rem;
            }

            .btn-primary-glow,
            .btn-outline-glow {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
        }

        @media (max-width: 520px) {
            .cat-title {
                font-size: 1.8rem;
            }

            .cat-hero {
                padding: 110px 0 40px;
            }
        }

/* roulang page: category3 */
/* ============ DESIGN SYSTEM VARIABLES ============ */
        :root {
            --primary-bg: #0A0E1A;
            --secondary-bg: #10172A;
            --card-bg: rgba(16, 23, 42, 0.7);
            --card-border: rgba(0, 240, 255, 0.2);
            --accent-cyan: #00F0FF;
            --accent-blue: #0052FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --gold: #FFD700;
            --red-tag: #D32F2F;
            --border-radius: 16px;
            --border-radius-sm: 10px;
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
        }

        /* ============ RESET & BASE ============ */
        * {
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: var(--primary-bg);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            min-height: 100vh;
            background-image: 
                radial-gradient(ellipse at 20% 50%, rgba(0, 82, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(0, 240, 255, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(0, 82, 255, 0.05) 0%, transparent 50%);
            padding-top: 76px;
        }

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

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

        /* ============ NAVBAR ============ */
        .navbar {
            background: rgba(10, 14, 26, 0.85) !important;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            padding: 12px 0;
            transition: all var(--transition-smooth);
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.3);
        }

        .navbar-brand {
            font-weight: 700;
            font-size: 1.3rem;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
        }

        .navbar-nav .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 18px !important;
            border-radius: 8px;
            transition: all var(--transition-fast);
            margin: 0 2px;
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 12px var(--accent-glow);
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 8px 22px;
            border-radius: 25px;
            font-weight: 600;
            transition: all var(--transition-fast);
        }

        .btn-login:hover {
            background: rgba(0, 240, 255, 0.15);
            box-shadow: 0 0 16px var(--accent-glow);
            color: var(--accent-cyan);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            color: #fff;
            padding: 9px 26px;
            border-radius: 25px;
            font-weight: 700;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.3);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.5);
            color: #fff;
        }

        /* ============ PAGE HERO ============ */
        .page-hero {
            position: relative;
            padding: 80px 0 60px;
            background: url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
            background-attachment: fixed;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.9) 0%, rgba(16, 23, 42, 0.85) 50%, rgba(10, 14, 26, 0.92) 100%);
            z-index: 1;
        }

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

        .hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .hero-breadcrumb a {
            color: var(--accent-cyan);
            font-weight: 500;
        }

        .hero-breadcrumb a:hover {
            color: var(--gold);
        }

        .hero-badge {
            display: inline-block;
            background: rgba(255, 215, 0, 0.15);
            border: 1px solid var(--gold);
            color: var(--gold);
            padding: 6px 20px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .page-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #FFFFFF 0%, #FFD700 50%, #FF9F00 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-hero p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 650px;
        }

        .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
            margin-top: 24px;
        }

        .hero-stat-item {
            text-align: left;
            min-width: 100px;
        }

        .hero-stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.1;
        }

        .hero-stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ============ SECTION STYLES ============ */
        .section-padding {
            padding: 70px 0;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #FFFFFF, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            margin-bottom: 48px;
        }

        /* ============ PROMO CARDS ============ */
        .promo-card {
            background: var(--card-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius);
            padding: 32px;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
            height: 100%;
            position: relative;
            overflow: hidden;
        }

        .promo-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.4s ease;
        }

        .promo-card:hover::before {
            transform: scaleX(1);
        }

        .promo-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 12px 40px rgba(0, 240, 255, 0.3);
            border-color: var(--accent-cyan);
        }

        .promo-tag {
            display: inline-block;
            background: rgba(211, 47, 47, 0.2);
            border: 1px solid var(--red-tag);
            color: var(--red-tag);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .promo-tag.gold {
            background: rgba(255, 215, 0, 0.2);
            border-color: var(--gold);
            color: var(--gold);
        }

        .promo-tag.cyan {
            background: rgba(0, 240, 255, 0.15);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        .promo-icon {
            font-size: 2.5rem;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

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

        .promo-card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .promo-amount {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--gold);
            margin-bottom: 4px;
        }

        .promo-detail {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .btn-promo {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 10px 24px;
            border-radius: 25px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-promo:hover {
            background: rgba(0, 240, 255, 0.15);
            box-shadow: 0 0 16px var(--accent-glow);
            color: var(--accent-cyan);
            transform: translateY(-2px);
        }

        /* ============ TABLE STYLES ============ */
        .promo-table-wrapper {
            background: var(--card-bg);
            backdrop-filter: blur(12px);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius);
            padding: 32px;
            box-shadow: var(--shadow-card);
            overflow-x: auto;
        }

        .promo-table {
            width: 100%;
            color: var(--text-secondary);
            border-collapse: collapse;
        }

        .promo-table th {
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-cyan);
            font-weight: 600;
            padding: 14px 16px;
            text-align: left;
            font-size: 0.9rem;
            border-bottom: 1px solid var(--card-border);
        }

        .promo-table td {
            padding: 14px 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.9rem;
            vertical-align: middle;
        }

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

        .table-highlight {
            color: var(--gold);
            font-weight: 700;
        }

        .table-badge {
            background: rgba(0, 240, 255, 0.15);
            color: var(--accent-cyan);
            padding: 4px 12px;
            border-radius: 15px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        /* ============ TIMELINE ============ */
        .timeline-section {
            position: relative;
        }

        .timeline-item {
            display: flex;
            gap: 24px;
            margin-bottom: 40px;
            position: relative;
        }

        .timeline-dot {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
            box-shadow: 0 0 20px var(--accent-glow);
            z-index: 2;
        }

        .timeline-line {
            position: absolute;
            left: 23px;
            top: 48px;
            bottom: -40px;
            width: 2px;
            background: linear-gradient(to bottom, var(--accent-cyan), transparent);
        }

        .timeline-content {
            background: var(--card-bg);
            backdrop-filter: blur(12px);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-sm);
            padding: 24px;
            flex: 1;
            transition: all var(--transition-smooth);
        }

        .timeline-content:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 20px var(--accent-glow);
        }

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

        .timeline-content p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ============ CTA SECTION ============ */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.1) 0%, rgba(0, 240, 255, 0.05) 100%);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius);
            padding: 60px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }

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

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .cta-section p {
            font-size: 1rem;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-cta-large {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            color: #fff;
            padding: 16px 40px;
            border-radius: 35px;
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: 0 6px 28px rgba(0, 240, 255, 0.35);
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 12px;
            letter-spacing: 0.3px;
        }

        .btn-cta-large:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 240, 255, 0.55);
            color: #fff;
        }

        /* ============ FAQ ============ */
        .faq-item {
            background: var(--card-bg);
            backdrop-filter: blur(12px);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-sm);
            margin-bottom: 16px;
            overflow: hidden;
            transition: all var(--transition-smooth);
        }

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

        .faq-question {
            padding: 20px 24px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: var(--text-primary);
            transition: all var(--transition-fast);
            font-size: 1rem;
        }

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

        .faq-question i {
            transition: transform var(--transition-fast);
            color: var(--accent-cyan);
            font-size: 0.9rem;
        }

        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ============ FAB ============ */
        .fab-support {
            position: fixed;
            left: 20px;
            bottom: 100px;
            z-index: 1050;
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 20px var(--accent-glow);
            cursor: pointer;
            transition: all var(--transition-smooth);
            animation: floatFAB 2.5s ease-in-out infinite;
            opacity: 0.8;
            border: 2px solid rgba(255, 255, 255, 0.3);
        }

        .fab-support:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.7);
            animation: none;
        }

        .fab-support i {
            font-size: 1.5rem;
            color: #fff;
        }

        .fab-notification {
            position: absolute;
            top: 2px;
            right: 2px;
            width: 14px;
            height: 14px;
            background: var(--red-tag);
            border-radius: 50%;
            border: 2px solid #fff;
            animation: blink 1.5s infinite;
        }

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

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

        /* ============ FOOTER ============ */
        .site-footer {
            background: rgba(16, 23, 42, 0.9);
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            padding: 50px 0 20px;
            margin-top: 40px;
        }

        .footer-brand {
            color: var(--accent-cyan);
            font-weight: 700;
            font-size: 1.2rem;
        }

        .footer-links a {
            display: block;
            color: var(--text-secondary);
            padding: 4px 0;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
            padding-left: 6px;
        }

        .trust-badge {
            display: inline-flex;
            align-items: center;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-top: 12px;
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            .page-hero h1 {
                font-size: 2.4rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .hero-stats {
                gap: 20px;
            }
            .hero-stat-number {
                font-size: 2rem;
            }
            .promo-card {
                padding: 24px;
            }
            .cta-section {
                padding: 40px 24px;
            }
        }

        @media (max-width: 768px) {
            .page-hero {
                padding: 60px 0 40px;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero p {
                font-size: 0.95rem;
            }
            .section-padding {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .promo-table-wrapper {
                padding: 16px;
            }
            .promo-table th,
            .promo-table td {
                padding: 10px 8px;
                font-size: 0.8rem;
            }
            .timeline-item {
                flex-direction: column;
                gap: 12px;
            }
            .timeline-dot {
                width: 36px;
                height: 36px;
                font-size: 1rem;
            }
            .timeline-line {
                left: 17px;
                top: 36px;
            }
            .hero-stats {
                gap: 16px;
            }
            .hero-stat-number {
                font-size: 1.6rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .fab-support {
                width: 50px;
                height: 50px;
                left: 12px;
                bottom: 80px;
            }
            .fab-support i {
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.7rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .promo-card {
                padding: 20px;
            }
            .btn-primary-glow,
            .btn-cta-large {
                padding: 12px 24px;
                font-size: 0.95rem;
            }
            .navbar-brand {
                font-size: 1.1rem;
            }
            .hero-stats {
                gap: 12px;
                flex-direction: column;
            }
            .hero-stat-item {
                min-width: auto;
            }
        }

/* roulang page: category4 */
:root {
            --primary-bg: #0A0E1A;
            --secondary-bg: #10172A;
            --card-bg: rgba(16, 23, 42, 0.7);
            --card-border: rgba(0, 240, 255, 0.2);
            --accent-cyan: #00F0FF;
            --accent-blue: #0052FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --gold: #FFD700;
            --red-tag: #D32F2F;
            --border-radius: 16px;
            --border-radius-sm: 10px;
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: var(--primary-bg);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            min-height: 100vh;
            background-image: 
                radial-gradient(ellipse at 20% 50%, rgba(0, 82, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(0, 240, 255, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(0, 82, 255, 0.05) 0%, transparent 50%);
        }

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

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

        /* Navbar */
        .navbar {
            background: rgba(10, 14, 26, 0.85) !important;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            padding: 12px 0;
            transition: all var(--transition-smooth);
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.3);
            z-index: 1030;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.3rem;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
        }
        .navbar-nav .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 18px !important;
            border-radius: 8px;
            transition: all var(--transition-fast);
            margin: 0 2px;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 12px var(--accent-glow);
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 8px 22px;
            border-radius: 25px;
            font-weight: 600;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-login:hover {
            background: rgba(0, 240, 255, 0.15);
            box-shadow: 0 0 16px var(--accent-glow);
            color: var(--accent-cyan);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            color: #fff;
            padding: 9px 26px;
            border-radius: 25px;
            font-weight: 700;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.3);
            white-space: nowrap;
        }
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.5);
            color: #fff;
        }
        .navbar-toggler {
            border: 1px solid rgba(0, 240, 255, 0.4);
            padding: 6px 10px;
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 8px var(--accent-glow);
            outline: none;
        }

        /* Page Hero */
        .page-hero {
            position: relative;
            padding: 120px 0 60px;
            overflow: hidden;
            background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            background-attachment: fixed;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.9) 0%, rgba(16, 23, 42, 0.85) 50%, rgba(10, 14, 26, 0.92) 100%);
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.15);
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 6px 20px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 20px;
        }
        .page-hero-title {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #FFFFFF 0%, #00F0FF 50%, #0052FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 650px;
        }

        /* Glass Card */
        .glass-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
        }
        .glass-card:hover {
            border-color: rgba(0, 240, 255, 0.5);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }

        /* Support Stats */
        .stat-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius);
            padding: 30px 24px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            text-align: center;
            transition: all var(--transition-smooth);
        }
        .stat-card:hover {
            border-color: rgba(0, 240, 255, 0.5);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
            margin-bottom: 10px;
        }
        .stat-label {
            font-size: 1rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* Channel Card */
        .channel-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius);
            padding: 32px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: all var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }
        .channel-card:hover {
            border-color: rgba(0, 240, 255, 0.5);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        .channel-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent-cyan);
            margin-bottom: 20px;
            flex-shrink: 0;
        }
        .channel-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .channel-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 20px;
            flex-grow: 1;
        }
        .btn-channel {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 10px 24px;
            border-radius: 25px;
            font-weight: 600;
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
        }
        .btn-channel:hover {
            background: rgba(0, 240, 255, 0.15);
            box-shadow: 0 0 16px var(--accent-glow);
            color: var(--accent-cyan);
        }

        /* FAQ */
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-sm);
            margin-bottom: 14px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: rgba(0, 240, 255, 0.4);
        }
        .faq-question {
            padding: 20px 24px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-primary);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: all var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--accent-cyan);
        }
        .faq-question i {
            color: var(--accent-cyan);
            transition: transform var(--transition-fast);
            font-size: 0.9rem;
        }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.1), rgba(0, 240, 255, 0.08));
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius);
            padding: 50px 40px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        /* Footer */
        .site-footer {
            background: rgba(10, 14, 26, 0.95);
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            padding: 50px 0 30px;
            margin-top: 60px;
        }
        .footer-brand {
            font-weight: 700;
            font-size: 1.2rem;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .trust-badge {
            display: inline-block;
            background: rgba(255, 215, 0, 0.1);
            border: 1px solid var(--gold);
            color: var(--gold);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-top: 10px;
        }
        .footer-links a {
            display: block;
            color: var(--text-muted);
            padding: 4px 0;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }
        .footer-links a:hover {
            color: var(--accent-cyan);
            padding-left: 6px;
        }

        /* Responsive */
        @media (max-width: 991.98px) {
            .page-hero-title {
                font-size: 2.2rem;
            }
            .stat-number {
                font-size: 2.4rem;
            }
            .navbar .btn-login,
            .navbar .btn-signup {
                padding: 8px 18px;
                font-size: 0.85rem;
            }
        }
        @media (max-width: 767.98px) {
            .page-hero {
                padding: 100px 0 40px;
                background-attachment: scroll;
            }
            .page-hero-title {
                font-size: 1.8rem;
            }
            .page-hero-desc {
                font-size: 0.95rem;
            }
            .stat-number {
                font-size: 2rem;
            }
            .channel-card {
                padding: 24px;
            }
            .cta-section {
                padding: 30px 20px;
            }
        }
        @media (max-width: 575.98px) {
            .page-hero-title {
                font-size: 1.5rem;
            }
            .navbar-brand {
                font-size: 1.1rem;
            }
            .btn-login,
            .btn-signup {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
        }

        /* FAB */
        .fab-support {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 1050;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: 2px solid rgba(0, 240, 255, 0.8);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            cursor: pointer;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.4);
            transition: all var(--transition-smooth);
            opacity: 0.6;
            animation: fab-float 3s ease-in-out infinite;
        }
        .fab-support:hover {
            opacity: 1;
            transform: scale(1.12);
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.7);
            border-color: #fff;
        }
        .fab-support:active {
            transform: scale(0.94);
        }
        .fab-notification {
            position: absolute;
            top: 2px;
            right: 2px;
            width: 14px;
            height: 14px;
            background: var(--red-tag);
            border-radius: 50%;
            border: 2px solid #fff;
            animation: blink-dot 1.2s ease-in-out infinite;
        }
        @keyframes fab-float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }
        @keyframes blink-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }