/* roulang page: index */
:root {
            --bg-deep: #08090F;
            --bg-navy: #0D111E;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #94A3B8;
            --border-subtle: rgba(0, 240, 255, 0.15);
            --border-glow: rgba(0, 240, 255, 0.6);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.3);
            --shadow-glow-strong: 0 0 25px rgba(0, 240, 255, 0.5);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-deep);
            color: var(--text-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

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

        button, .button {
            cursor: pointer;
            font-family: inherit;
        }

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

        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background var(--transition-smooth);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: -0.01em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .logo i {
            color: var(--accent-cyan);
            font-size: 1.5rem;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-silver);
            padding: 0.25rem 0;
            position: relative;
            transition: color var(--transition-fast);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            box-shadow: 0 0 8px var(--accent-cyan);
            transition: width var(--transition-smooth);
        }

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

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--border-subtle);
            color: var(--text-white);
            padding: 0.5rem 1.25rem;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all var(--transition-fast);
        }

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

        .btn-signup {
            background: var(--accent-blue);
            color: var(--text-white);
            border: none;
            padding: 0.55rem 1.5rem;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            box-shadow: 0 0 12px rgba(0, 82, 255, 0.4);
            transition: all var(--transition-smooth);
        }

        .btn-signup:hover {
            background: #1a6bff;
            box-shadow: 0 0 20px rgba(0, 82, 255, 0.6);
            transform: translateY(-2px);
        }

        /* Mobile Nav Toggle */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* Hero */
        .hero {
            padding: 140px 0 80px;
            position: relative;
            background: radial-gradient(ellipse at 50% 0%, rgba(0, 82, 255, 0.08) 0%, transparent 60%);
        }

        .hero .container {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }

        .hero-icon-grid {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            margin-bottom: 1.5rem;
        }

        .hero-icon-grid .icon-badge {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            transition: all var(--transition-smooth);
        }

        .hero-icon-grid .icon-badge:hover {
            background: rgba(0, 240, 255, 0.15);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }

        .hero-status-bar {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            background: rgba(0, 240, 255, 0.05);
            border: 1px solid var(--border-subtle);
            border-radius: 50px;
            padding: 0.5rem 1.25rem;
            margin-bottom: 1.5rem;
            font-size: 0.85rem;
            color: var(--text-silver);
        }

        .hero-status-bar .pulse-dot {
            width: 10px;
            height: 10px;
            background: #00e676;
            border-radius: 50%;
            box-shadow: 0 0 10px #00e676;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.6; transform: scale(1.3); }
        }

        .hero h1 {
            font-size: clamp(2rem, 5vw, 3rem);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1.25rem;
            max-width: 700px;
            background: linear-gradient(135deg, #FFFFFF 0%, #CBD5E1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero .hero-desc {
            font-size: 1.05rem;
            color: var(--text-silver);
            max-width: 600px;
            margin-bottom: 2rem;
            line-height: 1.7;
        }

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

        .btn-primary {
            background: var(--accent-blue);
            color: var(--text-white);
            border: none;
            padding: 0.85rem 2rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 0 18px rgba(0, 82, 255, 0.5);
            transition: all var(--transition-smooth);
        }

        .btn-primary:hover {
            box-shadow: 0 0 30px rgba(0, 82, 255, 0.8);
            transform: translateY(-2px);
        }

        .btn-ghost {
            background: transparent;
            border: 1px solid var(--border-subtle);
            color: var(--text-white);
            padding: 0.8rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-smooth);
        }

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

        /* Sections */
        .section {
            padding: 80px 0;
        }

        .section-label {
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            color: var(--accent-cyan);
            margin-bottom: 0.75rem;
        }

        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--text-white);
        }

        .section-desc {
            font-size: 0.95rem;
            color: var(--text-silver);
            max-width: 600px;
            margin-bottom: 2.5rem;
            line-height: 1.7;
        }

        /* Voucher Grid */
        .voucher-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
        }

        .voucher-card {
            background: rgba(13, 17, 30, 0.8);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            position: relative;
            backdrop-filter: blur(8px);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

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

        .voucher-card .voucher-value {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1;
        }

        .voucher-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-white);
        }

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

        .voucher-card .btn-claim {
            align-self: flex-start;
            background: var(--accent-blue);
            color: #fff;
            border: none;
            padding: 0.6rem 1.5rem;
            border-radius: 50px;
            font-weight: 600;
            margin-top: auto;
            transition: all var(--transition-smooth);
        }

        .voucher-card .btn-claim:hover {
            box-shadow: 0 0 15px rgba(0, 82, 255, 0.6);
        }

        /* Rules Section */
        .rules-container {
            background: rgba(13, 17, 30, 0.6);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            backdrop-filter: blur(8px);
        }

        .rules-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 1.25rem;
        }

        .rules-list li {
            display: flex;
            gap: 1rem;
            align-items: flex-start;
            font-size: 0.95rem;
            color: var(--text-silver);
            line-height: 1.6;
        }

        .rules-list li i {
            color: var(--accent-cyan);
            font-size: 1.2rem;
            margin-top: 2px;
        }

        /* News / CMS List */
        .news-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }

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

        .news-item {
            display: flex;
            gap: 1rem;
            align-items: center;
            padding: 1rem;
            background: rgba(13, 17, 30, 0.5);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            transition: all var(--transition-smooth);
        }

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

        .news-item .news-text {
            flex: 1;
        }

        .news-item h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 0.25rem;
        }

        .news-item h4 a {
            color: inherit;
        }

        .news-item h4 a:hover {
            color: var(--accent-cyan);
        }

        .news-item .news-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .news-sidebar {
            background: rgba(13, 17, 30, 0.6);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            backdrop-filter: blur(8px);
        }

        .news-sidebar h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--accent-cyan);
        }

        .sidebar-link-item {
            padding: 0.75rem 0;
            border-bottom: 1px solid var(--border-subtle);
            font-size: 0.9rem;
            color: var(--text-silver);
            transition: color var(--transition-fast);
        }

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

        .sidebar-link-item:hover {
            color: var(--accent-cyan);
        }

        /* Reviews Wall */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 1.5rem;
        }

        .review-card {
            background: rgba(13, 17, 30, 0.6);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            backdrop-filter: blur(8px);
        }

        .review-card .stars {
            color: #FFD700;
            margin-bottom: 0.75rem;
        }

        .review-card p {
            font-size: 0.9rem;
            color: var(--text-silver);
            line-height: 1.6;
            margin-bottom: 1rem;
        }

        .review-card .reviewer {
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--text-white);
        }

        /* Channel selling points */
        .channel-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
        }

        .step-card {
            background: rgba(13, 17, 30, 0.6);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            text-align: left;
            backdrop-filter: blur(8px);
        }

        .step-card .step-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-cyan);
            margin-bottom: 0.5rem;
        }

        .step-card h3 {
            font-size: 1.15rem;
            margin-bottom: 0.75rem;
        }

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

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            max-width: 800px;
        }

        .faq-item {
            background: rgba(13, 17, 30, 0.6);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            backdrop-filter: blur(8px);
        }

        .faq-question {
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-white);
        }

        .faq-answer {
            padding: 0 1.5rem 1.25rem;
            color: var(--text-silver);
            font-size: 0.9rem;
            line-height: 1.7;
            display: none;
        }

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

        /* 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(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 3rem 2rem;
            text-align: left;
            backdrop-filter: blur(8px);
        }

        /* Footer */
        .site-footer {
            background: rgba(8, 9, 15, 0.9);
            border-top: 1px solid var(--border-subtle);
            padding: 3rem 0 2rem;
            margin-top: 3rem;
        }

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

        .footer-brand {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }

        .footer-desc {
            font-size: 0.85rem;
            color: var(--text-silver);
            line-height: 1.7;
        }

        .footer-bottom {
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-subtle);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 20px;
            bottom: 100px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50px;
            background: rgba(8, 9, 15, 0.75);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
            cursor: pointer;
            transition: all var(--transition-smooth);
            color: var(--accent-cyan);
            font-size: 1.4rem;
        }

        .fab::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: inherit;
            background: linear-gradient(135deg, #00F0FF, #0052FF);
            z-index: -1;
            mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask-composite: exclude;
            padding: 2px;
        }

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

        .fab .notification-dot {
            position: absolute;
            top: 4px;
            right: 8px;
            width: 10px;
            height: 10px;
            background: #ff0055;
            border-radius: 50%;
            animation: blink 1.2s infinite;
        }

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

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

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(8,9,15,0.98);
                flex-direction: column;
                padding: 1.5rem;
                gap: 1rem;
                border-bottom: 1px solid var(--border-subtle);
            }
            .nav-links.active {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .hero {
                padding: 120px 0 60px;
            }
            .nav-actions .btn-signup,
            .nav-actions .btn-login {
                display: inline-block;
            }
            .footer-bottom {
                flex-direction: column;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 1rem;
            }
            .hero-cta-group {
                flex-direction: column;
                width: 100%;
            }
            .hero-cta-group .btn-primary,
            .hero-cta-group .btn-ghost {
                width: 100%;
                text-align: center;
            }
        }

/* roulang page: article */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --card-bg: rgba(18, 24, 44, 0.6);
            --glass-bg: rgba(15, 18, 34, 0.7);
            --border-glass: rgba(0, 82, 255, 0.25);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.4);
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #8899B0;
            --gradient-cta: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --shadow-glow: 0 0 18px rgba(0, 240, 255, 0.35), 0 4px 24px rgba(0, 82, 255, 0.25);
            --shadow-card: 0 8px 28px rgba(0, 0, 0, 0.5);
            --radius-sm: 10px;
            --radius-md: 18px;
            --radius-lg: 24px;
            --transition-base: all 0.25s ease;
            --font-inter: 'Inter', sans-serif;
        }

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

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

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.2);
            transition: var(--transition-base);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.9rem 0;
            flex-wrap: wrap;
        }

        .logo {
            font-size: 1.35rem;
            font-weight: 700;
            letter-spacing: -0.3px;
            background: linear-gradient(135deg, #00F0FF, #0052FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.35rem;
        }

        .logo i {
            font-size: 1.6rem;
            background: none;
            -webkit-text-fill-color: var(--accent-cyan);
            text-shadow: 0 0 12px var(--accent-glow);
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
            align-items: center;
            margin: 0;
        }

        .nav-links a {
            color: var(--text-silver);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.45rem 0;
            position: relative;
            transition: color 0.2s;
            white-space: nowrap;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -3px;
            left: 0;
            width: 0;
            height: 2.5px;
            background: var(--accent-cyan);
            border-radius: 2px;
            transition: width 0.3s ease;
        }

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

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

        .nav-buttons {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 0.5rem 1.4rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition-base);
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-outline:hover {
            background: rgba(0, 240, 255, 0.12);
            box-shadow: 0 0 14px var(--accent-glow);
        }

        .btn-solid {
            background: var(--gradient-cta);
            border: none;
            color: #fff;
            padding: 0.55rem 1.6rem;
            border-radius: 40px;
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            transition: var(--transition-base);
            box-shadow: 0 4px 16px rgba(0, 82, 255, 0.45);
            white-space: nowrap;
        }

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

        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.6rem;
            cursor: pointer;
        }

        /* Article Layout */
        .article-hero {
            position: relative;
            background: linear-gradient(180deg, rgba(0,82,255,0.1) 0%, rgba(8,9,15,0.9) 100%), url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            padding: 5.5rem 0 3.5rem;
            border-bottom: 1px solid var(--border-glass);
            text-align: left;
        }

        .article-hero .container {
            max-width: 860px;
        }

        .breadcrumb {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 1.8rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--accent-cyan);
            text-decoration: none;
        }

        .category-badge {
            background: rgba(0, 240, 255, 0.12);
            color: var(--accent-cyan);
            padding: 0.25rem 1rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-left: 0.5rem;
        }

        .article-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 1.2rem;
            letter-spacing: -0.5px;
        }

        .article-meta {
            display: flex;
            gap: 1.5rem;
            color: var(--text-muted);
            font-size: 0.92rem;
            align-items: center;
            flex-wrap: wrap;
        }

        .article-body {
            padding: 3rem 0 4rem;
        }

        .article-content-wrapper {
            max-width: 800px;
            margin: 0 auto;
        }

        .article-content {
            font-size: 1.08rem;
            line-height: 1.8;
            color: var(--text-silver);
        }

        .article-content h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 2.5rem 0 1rem;
        }

        .article-content h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--accent-cyan);
            margin: 1.8rem 0 0.8rem;
        }

        .article-content p {
            margin-bottom: 1.3rem;
        }

        .article-content ul, .article-content ol {
            margin: 1rem 0 1.5rem 1.5rem;
        }

        .article-content li {
            margin-bottom: 0.6rem;
        }

        .article-content img {
            max-width: 100%;
            border-radius: var(--radius-md);
            margin: 2rem 0;
            box-shadow: var(--shadow-card);
        }

        .cta-inline {
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 2rem;
            margin: 2.5rem 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
        }

        .cta-inline p {
            font-weight: 600;
            font-size: 1.2rem;
            margin: 0;
            color: var(--text-white);
        }

        .btn-glow {
            background: var(--gradient-cta);
            color: #fff;
            font-weight: 700;
            padding: 0.85rem 2.2rem;
            border-radius: 50px;
            text-decoration: none;
            box-shadow: var(--shadow-glow);
            transition: var(--transition-base);
            display: inline-block;
        }

        .btn-glow:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.55);
            color: #fff;
        }

        .not-found-message {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 4rem 2rem;
            text-align: center;
            border: 1px solid var(--border-glass);
        }

        .not-found-message h3 {
            color: var(--accent-cyan);
            margin-bottom: 1rem;
        }

        /* Footer */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid rgba(0, 82, 255, 0.25);
            padding: 3.5rem 0 1.8rem;
            color: var(--text-silver);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }

        .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 0.8rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 1.2rem;
            bottom: 5rem;
            z-index: 50;
            width: 54px;
            height: 54px;
            border-radius: 100px;
            background: rgba(8, 9, 15, 0.7);
            backdrop-filter: blur(14px);
            border: 1.5px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-base);
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.55);
            animation: fabPulse 2.2s infinite;
        }

        .fab-left::before {
            content: '';
            position: absolute;
            inset: -3px;
            border-radius: 100px;
            background: linear-gradient(135deg, #00F0FF, #0052FF);
            z-index: -1;
            opacity: 0.9;
        }

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

        @keyframes fabPulse {
            0% { box-shadow: 0 0 12px rgba(0, 240, 255, 0.5); }
            50% { box-shadow: 0 0 28px rgba(0, 240, 255, 0.8); transform: scale(1.05); }
            100% { box-shadow: 0 0 12px rgba(0, 240, 255, 0.5); }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-hero h1 { font-size: 2.2rem; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.96);
                backdrop-filter: blur(20px);
                padding: 1.5rem;
                gap: 1.2rem;
                border-bottom: 1px solid var(--border-glass);
            }
            .nav-links.active-mobile {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .nav-buttons {
                gap: 0.5rem;
            }
            .btn-outline, .btn-solid {
                padding: 0.4rem 1rem;
                font-size: 0.8rem;
            }
            .article-hero { padding: 3.5rem 0 2.5rem; }
            .article-hero h1 { font-size: 1.9rem; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; gap: 0.8rem; }
            .fab-left { width: 46px; height: 46px; bottom: 4rem; }
        }

/* roulang page: category1 */
:root {
            --bg-deep: #08090F;
            --bg-card: rgba(13, 17, 30, 0.85);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --border-glow: rgba(0, 240, 255, 0.25);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 10px;
            --shadow-glow: 0 0 18px rgba(0, 82, 255, 0.4);
            --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            background: var(--bg-deep);
            color: var(--text-silver);
            font-family: 'Segoe UI', 'Inter', Roboto, sans-serif;
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            background-image: radial-gradient(circle at 20% 10%, rgba(0, 240, 255, 0.04) 0%, transparent 50%);
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 99;
            background: rgba(8, 9, 15, 0.8);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            padding: 1rem 0;
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-white);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #ffffff 0%, #00F0FF 80%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .logo i {
            background: none;
            -webkit-text-fill-color: var(--accent-cyan);
            font-size: 1.8rem;
        }

        .nav-links {
            display: flex;
            gap: 2.5rem;
            align-items: center;
            list-style: none;
            margin: 0;
        }

        .nav-links a {
            color: var(--text-silver);
            text-decoration: none;
            font-weight: 500;
            font-size: 1rem;
            transition: var(--transition-smooth);
            position: relative;
            padding-bottom: 6px;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: var(--transition-smooth);
            box-shadow: 0 0 8px var(--accent-cyan);
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: #fff;
        }

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .btn-login {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            padding: 0.5rem 1.5rem;
            border-radius: 30px;
            font-weight: 500;
            transition: var(--transition-smooth);
            cursor: pointer;
            font-size: 0.9rem;
        }

        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
        }

        .btn-signup {
            background: var(--accent-blue);
            border: none;
            color: #fff;
            padding: 0.5rem 1.8rem;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            font-size: 0.9rem;
            box-shadow: var(--shadow-glow);
            transition: var(--transition-smooth);
        }

        .btn-signup:hover {
            background: #0066ff;
            box-shadow: 0 0 24px rgba(0, 82, 255, 0.7);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
        }

        /* Hero Section */
        .page-hero {
            margin-top: 100px;
            padding: 3rem 0 4rem;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            position: relative;
            border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(8,9,15,0.9) 0%, rgba(8,9,15,0.6) 60%, rgba(8,9,15,0.3) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
            text-align: left;
        }

        .hero-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 1.25rem;
            text-shadow: 0 4px 20px rgba(0,0,0,0.5);
        }

        .hero-content p {
            font-size: 1.2rem;
            color: var(--text-silver);
            margin-bottom: 2rem;
        }

        .btn-primary-glow {
            background: var(--accent-blue);
            color: #fff;
            padding: 0.85rem 2.5rem;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1.1rem;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: none;
            box-shadow: 0 0 20px rgba(0, 82, 255, 0.5);
            transition: var(--transition-smooth);
            cursor: pointer;
            text-decoration: none;
        }

        .btn-primary-glow:hover {
            background: #0066ff;
            box-shadow: 0 0 28px rgba(0, 82, 255, 0.8);
            transform: scale(1.03);
        }

        /* Main Layout */
        .content-section {
            padding: 4rem 0;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
            text-align: left;
        }

        .section-sub {
            color: var(--text-silver);
            margin-bottom: 2.5rem;
            font-size: 1.05rem;
            max-width: 700px;
        }

        .promo-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 2rem;
            margin-bottom: 3rem;
        }

        .glass-card {
            background: rgba(13, 17, 30, 0.7);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 1.8rem;
            transition: var(--transition-smooth);
            box-shadow: 0 8px 24px rgba(0,0,0,0.4);
        }

        .glass-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.2);
            transform: translateY(-6px);
            background: rgba(13, 17, 30, 0.85);
        }

        .card-tag {
            display: inline-block;
            background: rgba(0, 240, 255, 0.15);
            color: var(--accent-cyan);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 0.25rem 0.9rem;
            border-radius: 20px;
            margin-bottom: 1rem;
            letter-spacing: 0.3px;
        }

        .glass-card h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
        }

        .glass-card .desc {
            color: var(--text-silver);
            margin-bottom: 1.5rem;
            line-height: 1.6;
        }

        .highlight-amount {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin: 0.8rem 0;
        }

        .btn-outline-neon {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 0.6rem 1.8rem;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition-smooth);
            cursor: pointer;
            text-decoration: none;
            display: inline-block;
        }

        .btn-outline-neon:hover {
            background: var(--accent-cyan);
            color: #0D111E;
            box-shadow: 0 0 18px rgba(0,240,255,0.6);
        }

        .steps-list {
            list-style: none;
            margin: 2rem 0 1rem;
        }

        .steps-list li {
            display: flex;
            gap: 1.2rem;
            margin-bottom: 2rem;
            align-items: flex-start;
        }

        .step-num {
            background: var(--accent-blue);
            color: #fff;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            flex-shrink: 0;
            box-shadow: 0 0 14px rgba(0,82,255,0.6);
        }

        .step-text h4 {
            font-size: 1.2rem;
            color: #fff;
            margin-bottom: 0.25rem;
        }

        .faq-item {
            border-bottom: 1px solid rgba(255,255,255,0.08);
            padding: 1.4rem 0;
        }

        .faq-question {
            font-weight: 700;
            color: #fff;
            font-size: 1.15rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
        }

        .faq-answer {
            color: var(--text-silver);
            margin-top: 0.8rem;
            display: none;
        }

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

        /* Footer */
        .site-footer {
            background: rgba(8,9,15,0.9);
            border-top: 1px solid rgba(0,240,255,0.15);
            padding: 2.5rem 0 1.5rem;
            margin-top: 2rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px,1fr));
            gap: 2rem;
        }

        .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.5rem;
        }

        .footer-bottom {
            margin-top: 2rem;
            padding-top: 1.2rem;
            border-top: 1px solid rgba(255,255,255,0.06);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            font-size: 0.85rem;
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #0D111E;
                margin-top: 1rem;
                padding: 1rem;
                border-radius: 12px;
            }
            .nav-links.active-mobile {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
        }

/* roulang page: category3 */
:root {
            --bg-deep: #08090F;
            --bg-elevated: rgba(13, 17, 30, 0.85);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-primary: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #94A3B8;
            --border-glow: rgba(0, 240, 255, 0.25);
            --card-glass: rgba(13, 17, 30, 0.7);
            --shadow-neon: 0 4px 20px rgba(0, 82, 255, 0.25);
            --shadow-cyan: 0 0 15px rgba(0, 240, 255, 0.5);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 10px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            background-image: radial-gradient(circle at 30% 10%, rgba(0, 82, 255, 0.12) 0%, transparent 45%),
                              radial-gradient(circle at 80% 70%, rgba(0, 240, 255, 0.08) 0%, transparent 45%);
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* ---- Navigation ---- */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 50;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            background: rgba(8, 9, 15, 0.8);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }

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

        .logo {
            font-weight: 700;
            font-size: 1.35rem;
            letter-spacing: 0.5px;
            background: linear-gradient(135deg, #FFFFFF 0%, #00F0FF 80%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            text-decoration: none;
        }
        .logo i {
            background: none;
            -webkit-text-fill-color: var(--accent-cyan);
            font-size: 1.5rem;
        }

        .nav-links {
            display: flex;
            gap: 0.4rem;
            list-style: none;
            align-items: center;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--text-silver);
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 40px;
            transition: var(--transition);
            font-size: 0.95rem;
            white-space: nowrap;
            border: 1px solid transparent;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: #FFFFFF;
            background: rgba(0, 240, 255, 0.08);
            border-color: rgba(0, 240, 255, 0.35);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
        }

        .header-buttons {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .btn-login {
            background: transparent;
            border: none;
            color: var(--text-silver);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            padding: 0.5rem 0.8rem;
        }
        .btn-signup {
            background: linear-gradient(135deg, #0052FF, #00C2FF);
            border: none;
            color: #fff;
            font-weight: 700;
            padding: 0.6rem 1.6rem;
            border-radius: 40px;
            cursor: pointer;
            box-shadow: 0 0 15px rgba(0, 82, 255, 0.5);
            transition: var(--transition);
            font-size: 0.95rem;
        }
        .btn-signup:hover {
            box-shadow: 0 0 22px rgba(0, 140, 255, 0.8);
            transform: scale(1.02);
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
        }

        @media (max-width: 920px) {
            .nav-links {
                display: none;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .header-buttons .btn-login {
                display: inline-block;
            }
        }

        /* ---- Hero Video Section ---- */
        .hero-video {
            position: relative;
            width: 100%;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            margin-top: 72px;
        }

        .hero-video-bg {
            position: absolute;
            top: 0; left: 0; width: 100%; height: 100%;
            object-fit: cover;
            filter: brightness(0.35) blur(3px);
            transform: scale(1.02);
            z-index: 0;
            background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
        }

        .hero-overlay {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 900px;
            padding: 2rem;
            background: rgba(8, 9, 15, 0.65);
            backdrop-filter: blur(10px);
            border-radius: 40px;
            border: 1px solid rgba(0, 240, 255, 0.3);
            box-shadow: 0 20px 45px rgba(0,0,0,0.7);
        }

        .hero-overlay h1 {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(to right, #fff, #00F0FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 1.2rem;
            line-height: 1.2;
        }

        .hero-overlay .sub {
            color: var(--text-silver);
            font-size: 1.25rem;
            margin-bottom: 2.2rem;
        }

        .play-btn {
            background: rgba(255,255,255,0.1);
            border: 2px solid var(--accent-cyan);
            color: white;
            font-size: 2.4rem;
            width: 70px;
            height: 70px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.2rem;
            cursor: pointer;
            transition: 0.3s;
            box-shadow: var(--shadow-cyan);
        }
        .play-btn:hover {
            background: var(--accent-cyan);
            color: #000;
        }

        @media (max-width: 768px) {
            .hero-overlay h1 { font-size: 2rem; }
        }

        /* ---- Main Sections ---- */
        .section {
            padding: 5rem 0;
        }

        .section-title {
            font-size: 2.4rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: #fff;
        }
        .section-desc {
            color: var(--text-silver);
            font-size: 1.15rem;
            max-width: 700px;
            margin-bottom: 2.5rem;
        }

        .glass-card {
            background: var(--card-glass);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-lg);
            padding: 2rem;
            transition: var(--transition);
        }
        .glass-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-neon);
        }

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

        .strategy-list {
            display: flex;
            flex-direction: column;
            gap: 1.8rem;
            margin-top: 2rem;
        }
        .strategy-item {
            display: flex;
            gap: 1.2rem;
            align-items: flex-start;
        }
        .strategy-icon {
            font-size: 2rem;
            color: var(--accent-cyan);
            width: 50px;
            text-align: center;
        }
        .strategy-item h4 {
            font-size: 1.3rem;
            margin-bottom: 0.3rem;
        }

        .btn-gradient {
            background: linear-gradient(135deg, #0052FF, #00C2FF);
            border: none;
            padding: 0.9rem 2.4rem;
            border-radius: 40px;
            font-weight: 700;
            color: #fff;
            cursor: pointer;
            box-shadow: 0 8px 18px rgba(0,82,255,0.45);
            transition: 0.3s;
            display: inline-block;
            text-decoration: none;
        }

        .faq-item {
            border-bottom: 1px solid rgba(255,255,255,0.1);
            padding: 1.4rem 0;
        }
        .faq-question {
            font-weight: 700;
            font-size: 1.2rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
        }

        .site-footer {
            background: rgba(0,0,0,0.7);
            backdrop-filter: blur(10px);
            padding: 3rem 0 1.5rem;
            margin-top: auto;
            border-top: 1px solid rgba(0,240,255,0.25);
        }

        @media (max-width: 768px) {
            .grid-2, .grid-3 { grid-template-columns: 1fr; }
            .section-title { font-size: 1.9rem; }
        }

/* roulang page: category2 */
/* :root Design Variables - Deep Tech Blue + Glassmorphism */
        :root {
            --primary-bg: #060B1A;
            --secondary-bg: #0C1329;
            --card-glass: rgba(16, 25, 52, 0.65);
            --border-glass: rgba(0, 240, 255, 0.25);
            --accent-cyan: #00F0FF;
            --accent-blue: #0052FF;
            --accent-gold: #FFD700;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #8899B4;
            --gradient-btn: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.4);
            --shadow-card: 0 8px 32px rgba(0, 5, 15, 0.6);
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-sm: 10px;
            --font-heading: 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --font-body: 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }

        /* Base Reset & Typography */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: var(--font-body);
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            background-image: radial-gradient(ellipse at 20% 20%, rgba(0, 82, 255, 0.08) 0%, transparent 50%), 
                              radial-gradient(ellipse at 80% 60%, rgba(0, 240, 255, 0.06) 0%, transparent 50%);
        }

        .container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 1.25rem;
            position: relative;
            z-index: 2;
        }

        /* Typography Hierarchy */
        h1, h2, h3, h4 {
            font-family: var(--font-heading);
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 0.75rem;
            line-height: 1.25;
        }
        h1 { font-size: clamp(2.2rem, 6vw, 3.2rem); letter-spacing: -0.5px; }
        h2 { font-size: clamp(1.8rem, 5vw, 2.5rem); }
        h3 { font-size: 1.5rem; }
        p { margin-bottom: 1rem; color: var(--text-silver); font-size: 1.05rem; }

        /* Navigation - Shared from whole site */
        .site-header {
            padding: 1rem 0;
            background: rgba(6, 11, 26, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-glass);
            position: sticky;
            top: 0;
            z-index: 50;
            transition: background 0.3s;
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .logo {
            font-family: var(--font-heading);
            font-size: 1.4rem;
            font-weight: 700;
            background: linear-gradient(to right, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            text-decoration: none;
            white-space: nowrap;
        }
        .logo i {
            background: none;
            -webkit-text-fill-color: var(--accent-cyan);
            font-size: 1.8rem;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
            align-items: center;
            margin: 0;
        }
        .nav-links a {
            color: var(--text-silver);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            position: relative;
            padding: 0.25rem 0;
            transition: color 0.2s;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: width 0.25s ease;
        }
        .nav-links a:hover, .nav-links a.active {
            color: var(--text-white);
        }
        .nav-links a.active::after, .nav-links a:hover::after {
            width: 100%;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .btn-login {
            background: transparent;
            border: none;
            color: var(--text-silver);
            font-weight: 600;
            padding: 0.5rem 1.2rem;
            cursor: pointer;
            transition: color 0.2s;
            font-size: 0.95rem;
        }
        .btn-login:hover { color: var(--accent-cyan); }
        .btn-signup {
            background: var(--gradient-btn);
            border: none;
            color: #fff;
            font-weight: 700;
            padding: 0.6rem 1.8rem;
            border-radius: 30px;
            cursor: pointer;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.35);
            transition: transform 0.2s, box-shadow 0.2s;
            font-size: 0.95rem;
        }
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.6);
        }

        /* Mobile Nav */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.8rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: var(--secondary-bg);
                padding: 1.5rem;
                border-radius: var(--radius-md);
                margin-top: 1rem;
                gap: 1.2rem;
                backdrop-filter: blur(10px);
                border: 1px solid var(--border-glass);
            }
            .nav-links.show { display: flex; }
            .mobile-toggle { display: block; }
            .nav-actions { margin-left: auto; }
            .btn-login, .btn-signup { padding: 0.5rem 1rem; font-size: 0.9rem; }
        }

        /* Hero - Coupon Wall Style */
        .hero {
            padding: 4rem 0 3.5rem;
            text-align: left;
            background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            position: relative;
            border-bottom: 1px solid var(--border-glass);
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(6,11,26,0.92) 0%, rgba(6,11,26,0.65) 60%, rgba(6,11,26,0.4) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2.5rem;
            align-items: center;
        }
        .hero-text h1 {
            margin-bottom: 1.25rem;
            background: linear-gradient(to right, #fff, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.2rem;
            color: var(--text-silver);
            margin-bottom: 2rem;
            max-width: 500px;
        }
        .coupon-panel {
            background: var(--card-glass);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 2rem;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .main-coupon {
            background: linear-gradient(145deg, #101D3A, #0A142E);
            border: 2px solid var(--accent-gold);
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            text-align: center;
            position: relative;
            box-shadow: 0 0 30px rgba(255, 215, 0, 0.25);
        }
        .coupon-badge {
            position: absolute;
            top: -15px;
            right: 20px;
            background: #FFD700;
            color: #000;
            font-weight: 800;
            padding: 0.3rem 1.2rem;
            border-radius: 20px;
            font-size: 0.85rem;
            box-shadow: 0 4px 12px rgba(255,215,0,0.5);
        }
        .coupon-value {
            font-size: 3rem;
            font-weight: 800;
            color: var(--accent-gold);
            margin-bottom: 0.5rem;
        }
        .coupon-code {
            background: #000;
            color: var(--accent-cyan);
            padding: 0.5rem 1.5rem;
            border-radius: 30px;
            font-weight: 700;
            letter-spacing: 1px;
            display: inline-block;
            margin: 0.75rem 0;
        }
        .btn-claim {
            background: var(--accent-gold);
            color: #000;
            font-weight: 800;
            padding: 0.85rem 2.5rem;
            border-radius: 40px;
            display: inline-block;
            text-decoration: none;
            transition: 0.2s;
            box-shadow: 0 6px 18px rgba(255,215,0,0.45);
            width: fit-content;
            margin: 0 auto;
        }
        .btn-claim:hover {
            transform: scale(1.03);
            box-shadow: 0 10px 25px rgba(255,215,0,0.7);
            color: #000;
        }
        @media (max-width: 768px) {
            .hero-content { grid-template-columns: 1fr; }
            .hero { padding: 2.5rem 0; }
            .coupon-value { font-size: 2.4rem; }
        }

        /* Section Spacing */
        .section {
            padding: 4rem 0;
        }
        .section-title {
            margin-bottom: 2.5rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        /* Steps / How-To */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 1.8rem;
        }
        .step-card {
            background: var(--card-glass);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(0,240,255,0.2);
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            transition: all 0.3s;
            position: relative;
        }
        .step-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--accent-cyan);
            opacity: 0.7;
            margin-bottom: 0.5rem;
        }
        .step-card h3 {
            margin: 0.5rem 0 0.75rem;
            font-size: 1.3rem;
        }
        .step-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 25px rgba(0,240,255,0.25);
            transform: translateY(-4px);
        }

        /* Device Selection Panel */
        .device-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 2rem 0;
        }
        .device-card {
            background: var(--card-glass);
            backdrop-filter: blur(12px);
            border-radius: var(--radius-lg);
            padding: 2rem;
            text-align: left;
            border: 1px solid transparent;
            transition: 0.25s;
            cursor: pointer;
        }
        .device-card.android { border-color: #32CD32; }
        .device-card.ios { border-color: #C0C0C0; }
        .device-card i { font-size: 2.8rem; margin-bottom: 1rem; display: block; color: var(--accent-cyan); }
        .btn-download {
            background: var(--gradient-btn);
            border: none;
            color: #fff;
            padding: 0.75rem 2rem;
            border-radius: 30px;
            font-weight: 700;
            display: inline-block;
            margin-top: 0.8rem;
            transition: 0.2s;
        }
        @media (max-width: 640px) {
            .device-grid { grid-template-columns: 1fr; }
        }

        /* Benefit List */
        .benefit-list {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            list-style: none;
        }
        .benefit-item {
            background: rgba(0,240,255,0.08);
            padding: 0.7rem 1.3rem;
            border-radius: 30px;
            color: var(--text-silver);
            font-weight: 500;
            border: 1px solid rgba(0,240,255,0.2);
        }

        /* FAQ Accordion */
        .faq-item {
            background: var(--card-glass);
            backdrop-filter: blur(10px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-sm);
            margin-bottom: 1rem;
            padding: 1.25rem 1.5rem;
            cursor: pointer;
            transition: 0.2s;
        }
        .faq-question {
            font-weight: 700;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-answer {
            margin-top: 0.8rem;
            color: var(--text-silver);
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        /* CTA bottom */
        .cta-section {
            background: linear-gradient(135deg, rgba(0,82,255,0.25), rgba(0,240,255,0.15));
            border-radius: var(--radius-lg);
            padding: 3rem 2rem;
            text-align: left;
            border: 1px solid var(--border-glass);
            margin: 2rem 0;
        }

        /* Footer - Shared */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-glass);
            padding: 3rem 0 1.5rem;
            margin-top: 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
        }
        .footer-brand {
            font-size: 1.3rem; font-weight: 700;
            background: linear-gradient(to right, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
            margin-bottom: 0.5rem;
        }
        .footer-desc { color: var(--text-muted); font-size: 0.9rem; }
        .footer-bottom {
            display: flex; justify-content: space-between; margin-top: 2rem; padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1); color: var(--text-muted); font-size: 0.85rem;
        }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; gap: 0.5rem; }
        }

        /* FAB Left */
        .fab-left {
            position: fixed; left: 1.5rem; bottom: 6rem; z-index: 50;
            width: 52px; height: 52px; background: var(--card-glass); backdrop-filter: blur(12px);
            border-radius: 40px; border: 2px solid var(--accent-cyan);
            display: flex; align-items: center; justify-content: center;
            box-shadow: 0 0 18px rgba(0,240,255,0.6);
            transition: 0.3s; color: var(--accent-cyan); font-size: 1.4rem;
        }
        .fab-left:hover { transform: scale(1.08); box-shadow: 0 0 28px rgba(0,240,255,0.9); }