/* roulang page: index */
:root {
            --bg-primary: #0b1120;
            --bg-secondary: #111827;
            --bg-tertiary: #1a2035;
            --accent-blue: #3b82f6;
            --accent-cyan: #06b6d4;
            --accent-green: #10b981;
            --accent-red: #ef4444;
            --accent-gold: #f59e0b;
            --text-primary: #f8fafc;
            --text-secondary: #cbd5e1;
            --text-muted: #94a3b8;
            --border-subtle: rgba(59, 130, 246, 0.2);
            --border-glow: rgba(6, 182, 212, 0.4);
            --glass-bg: rgba(17, 24, 39, 0.72);
            --glass-border: rgba(148, 163, 184, 0.14);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-neon: 0 0 20px rgba(6, 182, 212, 0.45);
            --shadow-glow-blue: 0 0 24px rgba(59, 130, 246, 0.35);
            --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.55), 0 0 24px rgba(6, 182, 212, 0.18);
            --transition-fast: 160ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-smooth: 280ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-bounce: 380ms cubic-bezier(0.34, 1.56, 0.64, 1);
        }

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

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

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

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

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

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

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

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

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

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(11, 17, 32, 0.86);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--glass-border);
            transition: background var(--transition-smooth);
        }

        .site-header.scrolled {
            background: rgba(11, 17, 32, 0.95);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-block: 14px;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-logo-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.85), rgba(6, 182, 212, 0.85));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 16px;
            color: #fff;
            letter-spacing: -0.5px;
            box-shadow: var(--shadow-glow-blue);
        }

        .nav-logo-text {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: -0.3px;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .nav-logo-text .accent {
            color: var(--accent-cyan);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }

        .nav-link:hover {
            color: var(--text-primary);
            background: rgba(59, 130, 246, 0.1);
            border-color: var(--border-subtle);
        }

        .nav-link.active {
            color: var(--accent-cyan);
            background: rgba(6, 182, 212, 0.1);
            border-color: var(--border-glow);
            font-weight: 600;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .btn-login {
            padding: 9px 18px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            background: transparent;
            border: 1px solid rgba(6, 182, 212, 0.4);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-login:hover {
            background: rgba(6, 182, 212, 0.12);
            border-color: var(--accent-cyan);
        }

        .btn-signup {
            padding: 9px 20px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, #3b82f6, #06b6d4);
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow-neon);
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }

        .btn-signup:hover {
            transform: translateY(-1px);
            box-shadow: 0 0 32px rgba(6, 182, 212, 0.55);
        }

        .btn-signup:active {
            transform: translateY(0);
            box-shadow: 0 0 16px rgba(6, 182, 212, 0.35);
        }

        /* Mobile Nav Toggle */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: background var(--transition-fast);
        }

        .nav-toggle:hover {
            background: rgba(148, 163, 184, 0.1);
        }

        .nav-toggle span {
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition-smooth);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* Mobile drawer */
        .mobile-drawer {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 16px 24px 20px;
            background: rgba(11, 17, 32, 0.97);
            border-bottom: 1px solid var(--glass-border);
            backdrop-filter: blur(20px);
        }

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

        .mobile-drawer .nav-link {
            padding: 12px 16px;
            border-radius: 10px;
            font-size: 15px;
        }

        /* Hero Section - Whitepaper Lead Gen */
        .hero-section {
            position: relative;
            padding-top: 110px;
            padding-bottom: 80px;
            background-image: linear-gradient(rgba(11, 17, 32, 0.88), rgba(11, 17, 32, 0.92)), url('/assets/images/013429c98a4aeea4.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 100vh;
            display: flex;
            align-items: center;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 40%, rgba(6, 182, 212, 0.12) 0%, transparent 55%);
            pointer-events: none;
        }

        .hero-grid {
            position: relative;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 56px;
            align-items: center;
        }

        .hero-content {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            border-radius: 999px;
            background: rgba(6, 182, 212, 0.12);
            border: 1px solid var(--border-glow);
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            width: fit-content;
        }

        .hero-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-green);
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.4); }
        }

        .hero-title {
            font-size: clamp(32px, 5vw, 52px);
            font-weight: 900;
            line-height: 1.18;
            letter-spacing: -0.5px;
            color: var(--text-primary);
            margin: 0;
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, #3b82f6, #06b6d4, #10b981);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 16px;
            line-height: 1.65;
            color: var(--text-secondary);
            max-width: 540px;
        }

        .hero-data-row {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            padding-top: 8px;
        }

        .hero-data-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .hero-data-value {
            font-size: 26px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }

        .hero-data-label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* Whitepaper Lead Form */
        .hero-form-card {
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            box-shadow: var(--shadow-glass);
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .hero-form-card .form-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.8px;
            color: var(--accent-gold);
        }

        .hero-form-title {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.3px;
        }

        .hero-form-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .form-group label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
        }

        .form-group input {
            padding: 12px 16px;
            border-radius: 10px;
            background: rgba(11, 17, 32, 0.6);
            border: 1px solid var(--glass-border);
            color: var(--text-primary);
            font-size: 14px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .form-group input::placeholder {
            color: var(--text-muted);
        }

        .form-group input:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
            outline: none;
        }

        .btn-download {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 24px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, #3b82f6, #06b6d4);
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow-neon);
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }

        .btn-download:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 36px rgba(6, 182, 212, 0.5);
        }

        .btn-download:active {
            transform: translateY(0);
        }

        .form-note {
            font-size: 12px;
            color: var(--text-muted);
            text-align: center;
        }

        /* Section Common */
        .section {
            padding-block: 72px;
        }

        .section-alt {
            background: var(--bg-secondary);
        }

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

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }

        .section-title {
            font-size: clamp(24px, 3.5vw, 36px);
            font-weight: 800;
            letter-spacing: -0.3px;
            line-height: 1.25;
            margin-bottom: 14px;
            color: var(--text-primary);
        }

        .section-desc {
            font-size: 15px;
            line-height: 1.65;
            color: var(--text-secondary);
            max-width: 680px;
        }

        /* Stats Grid */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            text-align: left;
            transition: all var(--transition-smooth);
            backdrop-filter: blur(10px);
        }

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

        .stat-number {
            font-size: 32px;
            font-weight: 900;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #3b82f6, #06b6d4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* Scenario Cards */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .scenario-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            display: flex;
            flex-direction: column;
            gap: 14px;
            transition: all var(--transition-smooth);
        }

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

        .scenario-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(6, 182, 212, 0.2));
            border: 1px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent-cyan);
        }

        .scenario-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.2px;
        }

        .scenario-card p {
            font-size: 14px;
            line-height: 1.6;
            color: var(--text-secondary);
        }

        /* Payment Methods */
        .payment-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .payment-chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 18px;
            border-radius: 999px;
            background: rgba(17, 24, 39, 0.7);
            border: 1px solid var(--glass-border);
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
        }

        .payment-chip:hover {
            border-color: var(--accent-cyan);
            color: var(--text-primary);
            box-shadow: 0 0 12px rgba(6, 182, 212, 0.2);
        }

        .payment-chip i {
            font-size: 16px;
            color: var(--accent-cyan);
        }

        /* Case Study / Testimonial */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .case-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            display: flex;
            flex-direction: column;
            gap: 16px;
            transition: all var(--transition-smooth);
        }

        .case-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glass);
        }

        .case-quote {
            font-size: 15px;
            line-height: 1.65;
            color: var(--text-secondary);
            font-style: italic;
        }

        .case-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .case-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, #3b82f6, #06b6d4);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
            color: #fff;
        }

        .case-name {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .case-role {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* CMS News List */
        .news-layout {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 24px;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .news-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 18px 20px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            transition: all var(--transition-smooth);
        }

        .news-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glass);
            transform: translateX(4px);
        }

        .news-item-thumb {
            width: 72px;
            height: 72px;
            border-radius: 10px;
            object-fit: cover;
            flex-shrink: 0;
            border: 1px solid var(--glass-border);
        }

        .news-item-content {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .news-item-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .news-item-excerpt {
            font-size: 13px;
            line-height: 1.55;
            color: var(--text-secondary);
        }

        .news-item-meta {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .news-sidebar-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 22px 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .news-sidebar-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .news-sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .news-sidebar-link {
            font-size: 14px;
            color: var(--text-secondary);
            padding: 6px 0;
            border-bottom: 1px solid rgba(148, 163, 184, 0.08);
            transition: all var(--transition-fast);
        }

        .news-sidebar-link:hover {
            color: var(--accent-cyan);
            padding-left: 4px;
        }

        /* Membership Comparison */
        .membership-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .membership-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 30px 26px;
            display: flex;
            flex-direction: column;
            gap: 16px;
            transition: all var(--transition-smooth);
            position: relative;
        }

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

        .membership-card.featured {
            border-color: var(--accent-gold);
            box-shadow: 0 0 28px rgba(245, 158, 11, 0.2);
        }

        .membership-badge {
            position: absolute;
            top: -10px;
            right: 20px;
            padding: 4px 12px;
            border-radius: 999px;
            background: linear-gradient(135deg, #f59e0b, #f97316);
            font-size: 11px;
            font-weight: 700;
            color: #fff;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .membership-level {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.8px;
        }

        .membership-name {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
        }

        .membership-benefits {
            display: flex;
            flex-direction: column;
            gap: 8px;
            list-style: none;
            padding: 0;
        }

        .membership-benefits li {
            font-size: 14px;
            color: var(--text-secondary);
            display: flex;
            align-items: flex-start;
            gap: 8px;
            line-height: 1.5;
        }

        .membership-benefits li i {
            color: var(--accent-green);
            font-size: 14px;
            margin-top: 2px;
        }

        /* Level Highlights */
        .level-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .level-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 22px 18px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            transition: all var(--transition-smooth);
            text-align: left;
        }

        .level-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glass);
        }

        .level-icon {
            font-size: 24px;
            color: var(--accent-gold);
        }

        .level-card h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .level-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* Review Bubbles */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .review-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            display: flex;
            flex-direction: column;
            gap: 14px;
            transition: all var(--transition-smooth);
        }

        .review-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glass);
        }

        .review-stars {
            display: flex;
            gap: 3px;
            color: var(--accent-gold);
            font-size: 14px;
        }

        .review-text {
            font-size: 14px;
            line-height: 1.6;
            color: var(--text-secondary);
        }

        .review-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .review-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, #06b6d4, #10b981);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 13px;
            color: #fff;
        }

        .review-author-name {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
        }

        /* Q&A Stream */
        .qa-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
        }

        .qa-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 22px 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            transition: all var(--transition-smooth);
        }

        .qa-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glass);
        }

        .qa-question {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }

        .qa-question i {
            color: var(--accent-cyan);
            margin-top: 3px;
        }

        .qa-answer {
            font-size: 14px;
            line-height: 1.6;
            color: var(--text-secondary);
            padding-left: 24px;
        }

        /* Campaign Block */
        .campaign-block {
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(6, 182, 212, 0.1));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            display: flex;
            flex-direction: column;
            gap: 22px;
            position: relative;
            overflow: hidden;
        }

        .campaign-block::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.2) 0%, transparent 70%);
        }

        .campaign-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.8px;
            color: var(--accent-gold);
        }

        .campaign-title {
            font-size: 24px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.3px;
        }

        .campaign-desc {
            font-size: 15px;
            line-height: 1.65;
            color: var(--text-secondary);
            max-width: 560px;
        }

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

        /* Hot Ranking */
        .ranking-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .ranking-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 18px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .ranking-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glass);
        }

        .ranking-number {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 14px;
            flex-shrink: 0;
        }

        .ranking-number.top1 {
            background: linear-gradient(135deg, #f59e0b, #f97316);
            color: #fff;
        }

        .ranking-number.top2 {
            background: linear-gradient(135deg, #94a3b8, #64748b);
            color: #fff;
        }

        .ranking-number.top3 {
            background: linear-gradient(135deg, #b45309, #92400e);
            color: #fff;
        }

        .ranking-number.other {
            background: rgba(148, 163, 184, 0.15);
            color: var(--text-secondary);
        }

        .ranking-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            flex: 1;
        }

        .ranking-meta {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Three Steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .step-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            transition: all var(--transition-smooth);
        }

        .step-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glass);
        }

        .step-number {
            font-size: 40px;
            font-weight: 900;
            background: linear-gradient(135deg, #3b82f6, #06b6d4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
        }

        .step-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .step-card p {
            font-size: 14px;
            line-height: 1.6;
            color: var(--text-secondary);
        }

        /* Accessibility */
        .accessibility-bar {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            padding: 20px 24px;
            background: rgba(16, 185, 129, 0.08);
            border: 1px solid rgba(16, 185, 129, 0.25);
            border-radius: var(--radius-md);
        }

        .accessibility-bar i {
            font-size: 22px;
            color: var(--accent-green);
        }

        .accessibility-bar p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.55;
            flex: 1;
            min-width: 200px;
        }

        /* CTA Section */
        .cta-section {
            padding-block: 80px;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(6, 182, 212, 0.08));
            border-top: 1px solid var(--glass-border);
            border-bottom: 1px solid var(--glass-border);
        }

        .cta-content {
            text-align: center;
            display: flex;
            flex-direction: column;
            gap: 22px;
            align-items: center;
            max-width: 680px;
            margin-inline: auto;
        }

        .cta-title {
            font-size: clamp(24px, 3.5vw, 34px);
            font-weight: 800;
            letter-spacing: -0.3px;
            color: var(--text-primary);
        }

        .cta-desc {
            font-size: 15px;
            line-height: 1.65;
            color: var(--text-secondary);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--glass-border);
            padding-block: 48px 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-brand {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
        }

        .footer-logo .accent {
            color: var(--accent-cyan);
        }

        .footer-desc {
            font-size: 13px;
            line-height: 1.6;
            color: var(--text-muted);
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
            list-style: none;
            padding: 0;
        }

        .footer-links a {
            font-size: 13px;
            color: var(--text-muted);
            transition: all var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid var(--glass-border);
            padding-top: 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }

        .footer-copy {
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-badges {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .footer-badge {
            padding: 5px 12px;
            border-radius: 999px;
            background: rgba(148, 163, 184, 0.08);
            border: 1px solid var(--glass-border);
            font-size: 11px;
            color: var(--text-muted);
            font-weight: 600;
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 54px;
            height: 54px;
            border-radius: 50%;
            background: rgba(11, 17, 32, 0.82);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent-cyan);
            cursor: pointer;
            box-shadow: var(--shadow-neon);
            transition: all var(--transition-smooth);
            animation: fab-breathe 3s ease-in-out infinite;
        }

        .fab:hover {
            transform: scale(1.1);
            box-shadow: 0 0 32px rgba(6, 182, 212, 0.55);
            animation-play-state: paused;
        }

        @keyframes fab-breathe {
            0%, 100% { transform: translateY(0); opacity: 0.8; }
            50% { transform: translateY(-6px); opacity: 1; }
        }

        .fab .notification-dot {
            position: absolute;
            top: -3px;
            right: -3px;
            width: 14px;
            height: 14px;
            background: var(--accent-red);
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: pulse-dot 1.8s ease-in-out infinite;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

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

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

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

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

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

            .news-layout {
                grid-template-columns: 1fr;
            }

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

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

            .nav-toggle {
                display: flex;
            }

            .nav-actions {
                gap: 6px;
            }

            .btn-login {
                padding: 7px 13px;
                font-size: 12px;
            }

            .btn-signup {
                padding: 7px 15px;
                font-size: 12px;
            }

            .hero-section {
                padding-top: 90px;
                padding-bottom: 52px;
            }

            .hero-title {
                font-size: 28px;
            }

            .hero-form-card {
                padding: 26px 20px;
            }

            .section {
                padding-block: 52px;
            }

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

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

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

            .campaign-block {
                padding: 30px 22px;
            }
        }

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

            .nav-logo-text {
                font-size: 16px;
            }

            .nav-logo-icon {
                width: 34px;
                height: 34px;
                font-size: 13px;
                border-radius: 9px;
            }

            .hero-title {
                font-size: 24px;
            }

            .hero-desc {
                font-size: 14px;
            }

            .hero-data-row {
                gap: 14px;
            }

            .hero-data-value {
                font-size: 20px;
            }

            .stats-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }

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

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

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

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

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

            .news-item {
                flex-direction: column;
                gap: 10px;
            }

            .news-item-thumb {
                width: 100%;
                height: auto;
                max-height: 180px;
                object-fit: cover;
            }

            .section-title {
                font-size: 22px;
            }

            .stat-card {
                padding: 20px 16px;
            }

            .stat-number {
                font-size: 26px;
            }
        }

/* roulang page: category1 */
:root {
        --bg-primary: #0b1120;
        --bg-secondary: #111827;
        --bg-tertiary: #1a2035;
        --accent-blue: #3b82f6;
        --accent-cyan: #06b6d4;
        --accent-green: #10b981;
        --accent-red: #ef4444;
        --accent-gold: #f59e0b;
        --text-primary: #f8fafc;
        --text-secondary: #cbd5e1;
        --text-muted: #94a3b8;
        --border-subtle: rgba(59, 130, 246, 0.2);
        --border-glow: rgba(6, 182, 212, 0.4);
        --glass-bg: rgba(17, 24, 39, 0.72);
        --glass-border: rgba(148, 163, 184, 0.14);
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-lg: 20px;
        --radius-xl: 28px;
        --shadow-neon: 0 0 20px rgba(6, 182, 212, 0.45);
        --shadow-glow-blue: 0 0 24px rgba(59, 130, 246, 0.35);
        --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.45);
        --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.55), 0 0 24px rgba(6, 182, 212, 0.18);
        --transition-fast: 160ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
        --transition-smooth: 280ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
        --transition-bounce: 380ms cubic-bezier(0.34, 1.56, 0.64, 1);
    }
    /* roulang page: category1 */
    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
    }
    body {
        font-family: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', sans-serif;
        background-color: var(--bg-primary);
        color: var(--text-primary);
        line-height: 1.6;
        min-height: 100vh;
        overflow-x: hidden;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: color var(--transition-fast);
    }
    a:hover {
        color: var(--accent-cyan);
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    button, input, select, textarea {
        font-family: inherit;
        font-size: inherit;
        line-height: inherit;
        color: inherit;
    }
    button:focus-visible, a:focus-visible, input:focus-visible {
        outline: 2px solid var(--accent-cyan);
        outline-offset: 3px;
    }
    .container {
        width: 100%;
        max-width: 1200px;
        margin-inline: auto;
        padding-inline: 24px;
    }
    /* Header & Navigation */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 100;
        background: rgba(11, 17, 32, 0.86);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        border-bottom: 1px solid var(--glass-border);
        transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
    }
    .site-header.scrolled {
        background: rgba(11, 17, 32, 0.95);
        box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
    }
    .nav-wrapper {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding-block: 14px;
        gap: 20px;
    }
    .nav-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }
    .nav-logo-icon {
        width: 42px;
        height: 42px;
        border-radius: 12px;
        background: linear-gradient(135deg, rgba(59, 130, 246, 0.85), rgba(6, 182, 212, 0.85));
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 900;
        font-size: 16px;
        color: #fff;
        letter-spacing: -0.5px;
        box-shadow: var(--shadow-glow-blue);
    }
    .nav-logo-text {
        font-size: 20px;
        font-weight: 800;
        letter-spacing: -0.3px;
        color: var(--text-primary);
        white-space: nowrap;
    }
    .nav-logo-text .accent {
        color: var(--accent-cyan);
    }
    .nav-links {
        display: flex;
        align-items: center;
        gap: 6px;
        flex-wrap: nowrap;
        overflow-x: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }
    .nav-links::-webkit-scrollbar {
        display: none;
    }
    .nav-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 9px 16px;
        border-radius: 10px;
        font-size: 14px;
        font-weight: 500;
        color: var(--text-secondary);
        white-space: nowrap;
        transition: all var(--transition-fast);
        border: 1px solid transparent;
    }
    .nav-link:hover {
        color: var(--text-primary);
        background: rgba(59, 130, 246, 0.1);
        border-color: var(--border-subtle);
    }
    .nav-link.active {
        color: var(--accent-cyan);
        background: rgba(6, 182, 212, 0.1);
        border-color: var(--border-glow);
        font-weight: 600;
    }
    .nav-actions {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }
    .btn-login {
        padding: 9px 18px;
        border-radius: 10px;
        font-size: 14px;
        font-weight: 600;
        color: var(--accent-cyan);
        background: transparent;
        border: 1px solid rgba(6, 182, 212, 0.4);
        cursor: pointer;
        transition: all var(--transition-fast);
    }
    .btn-login:hover {
        background: rgba(6, 182, 212, 0.1);
        border-color: var(--border-glow);
    }
    .btn-signup {
        padding: 9px 20px;
        border-radius: 10px;
        font-size: 14px;
        font-weight: 700;
        color: #0b1120;
        background: linear-gradient(135deg, #3b82f6, #06b6d4);
        border: none;
        cursor: pointer;
        box-shadow: var(--shadow-glow-blue);
        transition: all var(--transition-fast);
    }
    .btn-signup:hover {
        box-shadow: var(--shadow-neon);
        transform: translateY(-1px);
    }
    /* Hero Section */
    .hero-section {
        padding-top: 120px;
        padding-bottom: 60px;
        background-image: url('/assets/images/ef2fedb2155d17e5.jpg');
        background-size: cover;
        background-position: center;
        position: relative;
        min-height: 580px;
        display: flex;
        align-items: center;
    }
    .hero-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, rgba(11, 17, 32, 0.82) 0%, rgba(11, 17, 32, 0.92) 60%, var(--bg-primary) 100%);
        z-index: 1;
    }
    .hero-content {
        position: relative;
        z-index: 2;
        max-width: 760px;
    }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 8px 16px;
        border-radius: 9999px;
        background: rgba(6, 182, 212, 0.12);
        border: 1px solid var(--border-glow);
        color: var(--accent-cyan);
        font-size: 13px;
        font-weight: 600;
        margin-bottom: 20px;
        letter-spacing: 0.2px;
    }
    .hero-badge i {
        font-size: 12px;
    }
    .hero-title {
        font-size: 44px;
        font-weight: 900;
        line-height: 1.2;
        letter-spacing: -1px;
        margin-bottom: 20px;
        color: var(--text-primary);
    }
    .hero-title .highlight {
        background: linear-gradient(135deg, #3b82f6, #06b6d4);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .hero-subtitle {
        font-size: 18px;
        color: var(--text-secondary);
        line-height: 1.65;
        margin-bottom: 28px;
        max-width: 640px;
    }
    .hero-check-list {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 12px;
        margin-bottom: 32px;
    }
    .hero-check-item {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 14px;
        color: var(--text-secondary);
        padding: 10px 14px;
        background: rgba(17, 24, 39, 0.6);
        border: 1px solid rgba(148, 163, 184, 0.12);
        border-radius: 10px;
        backdrop-filter: blur(6px);
        -webkit-backdrop-filter: blur(6px);
    }
    .hero-check-item i {
        color: var(--accent-green);
        font-size: 15px;
        flex-shrink: 0;
    }
    .hero-cta-row {
        display: flex;
        flex-wrap: wrap;
        gap: 14px;
        align-items: center;
    }
    .btn-primary {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 14px 28px;
        border-radius: 12px;
        font-size: 16px;
        font-weight: 700;
        color: #0b1120;
        background: linear-gradient(135deg, #3b82f6, #06b6d4);
        border: none;
        cursor: pointer;
        box-shadow: var(--shadow-glow-blue);
        transition: all var(--transition-fast);
        white-space: nowrap;
    }
    .btn-primary:hover {
        box-shadow: var(--shadow-neon);
        transform: translateY(-2px);
        color: #0b1120;
    }
    .btn-secondary {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 14px 24px;
        border-radius: 12px;
        font-size: 15px;
        font-weight: 600;
        color: var(--text-primary);
        background: rgba(17, 24, 39, 0.7);
        border: 1px solid var(--glass-border);
        cursor: pointer;
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        transition: all var(--transition-fast);
        white-space: nowrap;
    }
    .btn-secondary:hover {
        border-color: var(--border-glow);
        color: var(--accent-cyan);
    }
    /* Stats Bar */
    .stats-bar {
        padding: 36px 0;
        border-bottom: 1px solid var(--glass-border);
        background: var(--bg-secondary);
    }
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 20px;
    }
    .stat-item {
        text-align: left;
        padding: 16px 20px;
        border-radius: var(--radius-md);
        background: var(--glass-bg);
        border: 1px solid var(--glass-border);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
    }
    .stat-value {
        font-size: 32px;
        font-weight: 800;
        color: var(--accent-cyan);
        letter-spacing: -0.5px;
        margin-bottom: 6px;
    }
    .stat-label {
        font-size: 14px;
        color: var(--text-muted);
        font-weight: 500;
    }
    /* Section Base */
    .section {
        padding: 64px 0;
        position: relative;
    }
    .section-alt {
        background: var(--bg-secondary);
        border-top: 1px solid var(--glass-border);
        border-bottom: 1px solid var(--glass-border);
    }
    .section-header {
        margin-bottom: 40px;
        max-width: 720px;
        text-align: left;
    }
    .section-tag {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 13px;
        font-weight: 600;
        color: var(--accent-cyan);
        text-transform: uppercase;
        letter-spacing: 0.5px;
        margin-bottom: 12px;
    }
    .section-tag::before {
        content: '';
        width: 24px;
        height: 2px;
        background: var(--accent-cyan);
        border-radius: 1px;
    }
    .section-title {
        font-size: 32px;
        font-weight: 800;
        line-height: 1.25;
        letter-spacing: -0.5px;
        color: var(--text-primary);
        margin-bottom: 14px;
    }
    .section-desc {
        font-size: 16px;
        line-height: 1.65;
        color: var(--text-secondary);
    }
    /* Steps / Process */
    .steps-list {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
        gap: 20px;
    }
    .step-item {
        padding: 24px;
        border-radius: var(--radius-md);
        background: var(--glass-bg);
        border: 1px solid var(--glass-border);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        transition: all var(--transition-smooth);
        position: relative;
        overflow: hidden;
    }
    .step-item:hover {
        border-color: var(--border-glow);
        box-shadow: var(--shadow-card-hover);
        transform: translateY(-3px);
    }
    .step-number {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 42px;
        height: 42px;
        border-radius: 50%;
        background: linear-gradient(135deg, #3b82f6, #06b6d4);
        color: #0b1120;
        font-weight: 800;
        font-size: 18px;
        margin-bottom: 16px;
        flex-shrink: 0;
    }
    .step-title {
        font-size: 18px;
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 8px;
    }
    .step-desc {
        font-size: 14px;
        line-height: 1.6;
        color: var(--text-secondary);
    }
    /* Feature Cards */
    .feature-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 20px;
    }
    .feature-card {
        padding: 26px;
        border-radius: var(--radius-md);
        background: var(--glass-bg);
        border: 1px solid var(--glass-border);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        transition: all var(--transition-smooth);
    }
    .feature-card:hover {
        border-color: var(--border-glow);
        box-shadow: var(--shadow-card-hover);
        transform: translateY(-3px);
    }
    .feature-icon {
        width: 52px;
        height: 52px;
        border-radius: 14px;
        background: rgba(59, 130, 246, 0.12);
        border: 1px solid var(--border-subtle);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        color: var(--accent-cyan);
        margin-bottom: 16px;
    }
    .feature-title {
        font-size: 18px;
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 8px;
    }
    .feature-desc {
        font-size: 14px;
        line-height: 1.65;
        color: var(--text-secondary);
    }
    /* Scenario / List */
    .scenario-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 32px;
        align-items: center;
    }
    .scenario-visual {
        border-radius: var(--radius-lg);
        overflow: hidden;
        border: 1px solid var(--glass-border);
        box-shadow: var(--shadow-glass);
        height: 100%;
        min-height: 320px;
        position: relative;
    }
    .scenario-visual img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    .scenario-visual::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, transparent 50%, rgba(11, 17, 32, 0.7) 100%);
    }
    .scenario-content {
        display: flex;
        flex-direction: column;
        gap: 16px;
    }
    .scenario-list {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 14px;
    }
    .scenario-list li {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        font-size: 15px;
        line-height: 1.6;
        color: var(--text-secondary);
    }
    .scenario-list li i {
        color: var(--accent-green);
        margin-top: 4px;
        flex-shrink: 0;
    }
    /* CMS List */
    .cms-list {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        gap: 20px;
    }
    .cms-card {
        display: flex;
        flex-direction: column;
        padding: 22px;
        border-radius: var(--radius-md);
        background: var(--glass-bg);
        border: 1px solid var(--glass-border);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        transition: all var(--transition-smooth);
        text-decoration: none;
        color: inherit;
    }
    .cms-card:hover {
        border-color: var(--border-glow);
        box-shadow: var(--shadow-card-hover);
        transform: translateY(-3px);
        color: inherit;
    }
    .cms-card-category {
        font-size: 12px;
        font-weight: 600;
        color: var(--accent-cyan);
        text-transform: uppercase;
        letter-spacing: 0.4px;
        margin-bottom: 8px;
    }
    .cms-card-title {
        font-size: 17px;
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 8px;
        line-height: 1.4;
    }
    .cms-card-summary {
        font-size: 14px;
        line-height: 1.6;
        color: var(--text-muted);
        margin-bottom: 14px;
        flex-grow: 1;
    }
    .cms-card-meta {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 13px;
        color: var(--text-muted);
    }
    .cms-card-meta time {
        display: inline-flex;
        align-items: center;
        gap: 5px;
    }
    .cms-card-meta i {
        font-size: 12px;
    }
    .btn-view-more {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 11px 22px;
        border-radius: 10px;
        font-size: 14px;
        font-weight: 600;
        color: var(--accent-cyan);
        background: transparent;
        border: 1px solid var(--border-glow);
        cursor: pointer;
        transition: all var(--transition-fast);
        text-decoration: none;
        margin-top: 28px;
    }
    .btn-view-more:hover {
        background: rgba(6, 182, 212, 0.1);
        color: var(--accent-cyan);
    }
    /* FAQ */
    .faq-list {
        display: flex;
        flex-direction: column;
        gap: 14px;
        max-width: 820px;
    }
    .faq-item {
        padding: 20px 24px;
        border-radius: var(--radius-md);
        background: var(--glass-bg);
        border: 1px solid var(--glass-border);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        transition: all var(--transition-fast);
    }
    .faq-item:hover {
        border-color: var(--border-glow);
    }
    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        font-size: 16px;
        font-weight: 700;
        color: var(--text-primary);
        cursor: pointer;
        user-select: none;
    }
    .faq-question i {
        color: var(--accent-cyan);
        transition: transform var(--transition-fast);
        flex-shrink: 0;
    }
    .faq-item.open .faq-question i {
        transform: rotate(180deg);
    }
    .faq-answer {
        margin-top: 14px;
        font-size: 15px;
        line-height: 1.65;
        color: var(--text-secondary);
        display: none;
    }
    .faq-item.open .faq-answer {
        display: block;
    }
    /* CTA Section */
    .cta-section {
        padding: 80px 0;
        background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(6, 182, 212, 0.06));
        border-top: 1px solid var(--border-glow);
        border-bottom: 1px solid var(--border-glow);
    }
    .cta-card {
        padding: 48px 40px;
        border-radius: var(--radius-xl);
        background: var(--glass-bg);
        border: 1px solid var(--glass-border);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        box-shadow: var(--shadow-glass);
        text-align: left;
        max-width: 820px;
        margin-inline: auto;
    }
    .cta-title {
        font-size: 28px;
        font-weight: 800;
        color: var(--text-primary);
        letter-spacing: -0.5px;
        margin-bottom: 14px;
    }
    .cta-desc {
        font-size: 16px;
        line-height: 1.65;
        color: var(--text-secondary);
        margin-bottom: 28px;
    }
    .cta-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 14px;
    }
    /* FAB */
    .fab-support {
        position: fixed;
        left: 16px;
        bottom: 96px;
        z-index: 50;
        width: 56px;
        height: 56px;
        border-radius: 50%;
        background: rgba(7, 7, 13, 0.8);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border: 2px solid transparent;
        background-image: linear-gradient(rgba(7, 7, 13, 0.85), rgba(7, 7, 13, 0.85)), linear-gradient(135deg, #06b6d4, #3b82f6);
        background-origin: border-box;
        background-clip: padding-box, border-box;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        box-shadow: 0 0 20px rgba(6, 182, 212, 0.45);
        transition: all var(--transition-bounce);
        opacity: 0.8;
    }
    .fab-support:hover {
        opacity: 1;
        width: 60px;
        height: 60px;
        box-shadow: 0 0 32px rgba(6, 182, 212, 0.6);
        transform: scale(1.05);
    }
    .fab-support:active {
        transform: scale(0.94);
    }
    .fab-support i {
        font-size: 22px;
        color: #06b6d4;
    }
    .fab-notification {
        position: absolute;
        top: -2px;
        right: -2px;
        width: 14px;
        height: 14px;
        border-radius: 50%;
        background: #ef4444;
        border: 2px solid #fff;
        animation: pulse-dot 1.6s infinite;
    }
    @keyframes pulse-dot {
        0%, 100% { transform: scale(1); opacity: 1; }
        50% { transform: scale(1.3); opacity: 0.65; }
    }
    /* Footer */
    .site-footer {
        padding: 56px 0 28px;
        background: var(--bg-secondary);
        border-top: 1px solid var(--glass-border);
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 32px;
        margin-bottom: 36px;
    }
    .footer-logo {
        font-size: 24px;
        font-weight: 800;
        color: var(--text-primary);
    }
    .footer-logo .accent {
        color: var(--accent-cyan);
    }
    .footer-desc {
        font-size: 14px;
        line-height: 1.6;
        color: var(--text-muted);
        margin-top: 12px;
        max-width: 320px;
    }
    .footer-col h4 {
        font-size: 15px;
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 14px;
    }
    .footer-links {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 8px;
    }
    .footer-links a {
        font-size: 14px;
        color: var(--text-muted);
        transition: color var(--transition-fast);
        text-decoration: none;
    }
    .footer-links a:hover {
        color: var(--accent-cyan);
    }
    .footer-bottom {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        padding-top: 24px;
        border-top: 1px solid var(--glass-border);
    }
    .footer-copy {
        font-size: 13px;
        color: var(--text-muted);
    }
    .footer-badges {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }
    .footer-badge {
        display: inline-flex;
        align-items: center;
        gap: 5px;
        padding: 6px 12px;
        border-radius: 8px;
        font-size: 12px;
        font-weight: 600;
        color: var(--text-secondary);
        background: rgba(17, 24, 39, 0.6);
        border: 1px solid var(--glass-border);
    }
    /* Responsive */
    @media (max-width: 1024px) {
        .hero-title {
            font-size: 36px;
        }
        .section-title {
            font-size: 27px;
        }
        .scenario-grid {
            grid-template-columns: 1fr;
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
        }
    }
    @media (max-width: 768px) {
        .container {
            padding-inline: 16px;
        }
        .nav-wrapper {
            flex-wrap: nowrap;
            gap: 12px;
            padding-block: 10px;
        }
        .nav-logo-text {
            font-size: 16px;
        }
        .nav-logo-icon {
            width: 36px;
            height: 36px;
            font-size: 14px;
            border-radius: 10px;
        }
        .nav-links {
            gap: 4px;
        }
        .nav-link {
            padding: 7px 12px;
            font-size: 13px;
        }
        .btn-login {
            padding: 7px 13px;
            font-size: 13px;
        }
        .btn-signup {
            padding: 7px 15px;
            font-size: 13px;
        }
        .hero-section {
            padding-top: 100px;
            padding-bottom: 44px;
            min-height: 500px;
        }
        .hero-title {
            font-size: 30px;
        }
        .hero-subtitle {
            font-size: 16px;
        }
        .hero-check-list {
            grid-template-columns: 1fr;
        }
        .section {
            padding: 44px 0;
        }
        .section-title {
            font-size: 24px;
        }
        .stats-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
        }
        .stat-value {
            font-size: 26px;
        }
        .cms-list {
            grid-template-columns: 1fr;
        }
        .cta-card {
            padding: 32px 22px;
        }
        .cta-title {
            font-size: 23px;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }
        .fab-support {
            left: 12px;
            bottom: 80px;
            width: 50px;
            height: 50px;
        }
        .fab-support:hover {
            width: 53px;
            height: 53px;
        }
        .fab-support i {
            font-size: 19px;
        }
    }
    @media (max-width: 520px) {
        .nav-logo-text {
            display: none;
        }
        .nav-actions {
            gap: 6px;
        }
        .btn-login {
            padding: 6px 10px;
            font-size: 12px;
        }
        .btn-signup {
            padding: 6px 12px;
            font-size: 12px;
        }
        .hero-title {
            font-size: 25px;
        }
        .hero-subtitle {
            font-size: 15px;
        }
        .steps-list {
            grid-template-columns: 1fr;
        }
        .feature-grid {
            grid-template-columns: 1fr;
        }
        .stats-grid {
            grid-template-columns: 1fr;
        }
        .cta-actions {
            flex-direction: column;
        }
        .btn-primary, .btn-secondary {
            justify-content: center;
            width: 100%;
        }
        .footer-bottom {
            flex-direction: column;
            align-items: flex-start;
        }
    }

/* roulang page: article */
:root {
            --bg-primary: #0b1120;
            --bg-secondary: #111827;
            --bg-tertiary: #1a2035;
            --accent-blue: #3b82f6;
            --accent-cyan: #06b6d4;
            --accent-green: #10b981;
            --accent-red: #ef4444;
            --accent-gold: #f59e0b;
            --text-primary: #f8fafc;
            --text-secondary: #cbd5e1;
            --text-muted: #94a3b8;
            --border-subtle: rgba(59, 130, 246, 0.2);
            --border-glow: rgba(6, 182, 212, 0.4);
            --glass-bg: rgba(17, 24, 39, 0.72);
            --glass-border: rgba(148, 163, 184, 0.14);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-neon: 0 0 20px rgba(6, 182, 212, 0.45);
            --shadow-glow-blue: 0 0 24px rgba(59, 130, 246, 0.35);
            --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.55), 0 0 24px rgba(6, 182, 212, 0.18);
            --transition-fast: 160ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-smooth: 280ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-bounce: 380ms cubic-bezier(0.34, 1.56, 0.64, 1);
        }

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

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

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

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

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

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

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

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

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

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(11, 17, 32, 0.86);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--glass-border);
            transition: background var(--transition-smooth);
        }

        .site-header.scrolled {
            background: rgba(11, 17, 32, 0.95);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-block: 14px;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-logo-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.85), rgba(6, 182, 212, 0.85));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 16px;
            color: #fff;
            letter-spacing: -0.5px;
            box-shadow: var(--shadow-glow-blue);
        }

        .nav-logo-text {
            font-size: 18px;
            font-weight: 800;
            letter-spacing: -0.3px;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .nav-logo-text .accent {
            color: var(--accent-cyan);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }

        .nav-link:hover {
            color: var(--text-primary);
            background: rgba(59, 130, 246, 0.1);
            border-color: var(--border-subtle);
        }

        .nav-link.active {
            color: var(--accent-cyan);
            background: rgba(6, 182, 212, 0.1);
            border-color: var(--border-glow);
            font-weight: 600;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .btn-login {
            padding: 9px 18px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            background: transparent;
            border: 1px solid rgba(6, 182, 212, 0.4);
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .btn-login:hover {
            background: rgba(6, 182, 212, 0.1);
            border-color: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(6, 182, 212, 0.2);
            color: var(--accent-cyan);
        }

        .btn-signup {
            padding: 9px 22px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            cursor: pointer;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-glow-blue);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 32px rgba(6, 182, 212, 0.5), 0 4px 16px rgba(59, 130, 246, 0.35);
            color: #fff;
        }

        /* Article Page Styles */
        .article-page {
            padding-top: 88px;
            padding-bottom: 60px;
            min-height: 60vh;
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 24px;
            padding-block: 8px;
        }

        .article-breadcrumb a {
            color: var(--text-secondary);
            font-weight: 500;
            transition: color var(--transition-fast);
        }

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

        .article-breadcrumb .divider {
            color: var(--text-muted);
            font-size: 10px;
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 340px;
            gap: 40px;
            align-items: start;
        }

        .article-main-col {
            min-width: 0;
        }

        .article-reading {
            max-width: 720px;
        }

        .article-header {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 32px;
            margin-bottom: 28px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: var(--shadow-glass);
            position: relative;
            overflow: hidden;
        }

        .article-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan), var(--accent-green));
        }

        .article-category-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-cyan);
            background: rgba(6, 182, 212, 0.1);
            border: 1px solid rgba(6, 182, 212, 0.25);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .article-category-tag i {
            font-size: 11px;
        }

        .article-title {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.35;
            letter-spacing: -0.5px;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .article-meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta-item i {
            color: var(--accent-cyan);
            font-size: 13px;
        }

        .article-content {
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text-primary);
            margin-block: 32px 16px;
            letter-spacing: -0.3px;
            padding-left: 0;
            border-left: none;
        }

        .article-content h3 {
            font-size: 19px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-primary);
            margin-block: 24px 12px;
        }

        .article-content p {
            margin-bottom: 18px;
            line-height: 1.7;
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 20px;
            padding-left: 24px;
        }

        .article-content li {
            margin-bottom: 8px;
            line-height: 1.7;
        }

        .article-content strong {
            color: var(--text-primary);
            font-weight: 600;
        }

        .article-content a {
            color: var(--accent-cyan);
            border-bottom: 1px dashed rgba(6, 182, 212, 0.4);
            transition: all var(--transition-fast);
        }

        .article-content a:hover {
            color: #22d3ee;
            border-bottom-color: #22d3ee;
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin-block: 24px;
            box-shadow: var(--shadow-glass);
        }

        .article-content blockquote {
            border-left: 3px solid var(--accent-cyan);
            padding: 16px 20px;
            margin: 24px 0;
            background: rgba(6, 182, 212, 0.05);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-primary);
        }

        .article-footer-tags {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid var(--glass-border);
        }

        .article-footer-tags .label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-muted);
        }

        .article-tag-chip {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            border-radius: 16px;
            font-size: 12px;
            font-weight: 500;
            color: var(--text-secondary);
            background: rgba(59, 130, 246, 0.08);
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
        }

        .article-tag-chip:hover {
            color: var(--accent-cyan);
            border-color: var(--border-glow);
            background: rgba(6, 182, 212, 0.08);
        }

        .article-not-found {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 48px 32px;
            text-align: center;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: var(--shadow-glass);
        }

        .article-not-found-icon {
            font-size: 48px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .article-not-found h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
            font-size: 15px;
        }

        .btn-back-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            cursor: pointer;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-glow-blue);
        }

        .btn-back-home:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 32px rgba(6, 182, 212, 0.5);
            color: #fff;
        }

        /* Article Related */
        .article-related {
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid var(--glass-border);
        }

        .article-related-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 20px;
            letter-spacing: -0.2px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .related-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: all var(--transition-smooth);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

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

        .related-card-tag {
            font-size: 11px;
            font-weight: 600;
            color: var(--accent-cyan);
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        .related-card-title {
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .related-card-meta {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* Article CTA */
        .article-cta-section {
            margin-top: 40px;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(6, 182, 212, 0.08));
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 32px;
            text-align: left;
        }

        .article-cta-section h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            letter-spacing: -0.2px;
        }

        .article-cta-section p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 20px;
            line-height: 1.6;
        }

        .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            cursor: pointer;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-glow-blue);
        }

        .btn-cta-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 32px rgba(6, 182, 212, 0.5), 0 4px 16px rgba(59, 130, 246, 0.35);
            color: #fff;
        }

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

        .sidebar-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 24px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: var(--shadow-glass);
            transition: all var(--transition-smooth);
        }

        .sidebar-card:hover {
            border-color: rgba(6, 182, 212, 0.25);
        }

        .sidebar-card-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: -0.2px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card-title i {
            color: var(--accent-cyan);
            font-size: 14px;
        }

        .sidebar-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-links li a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 12px;
            border-radius: 8px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }

        .sidebar-links li a:hover {
            color: var(--accent-cyan);
            background: rgba(6, 182, 212, 0.06);
            border-color: var(--border-subtle);
        }

        .sidebar-links li a .arrow {
            font-size: 10px;
            color: var(--text-muted);
            transition: all var(--transition-fast);
        }

        .sidebar-links li a:hover .arrow {
            color: var(--accent-cyan);
            transform: translateX(4px);
        }

        .sidebar-image-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            cursor: pointer;
            display: block;
        }

        .sidebar-image-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .sidebar-image-card:hover img {
            transform: scale(1.04);
        }

        .sidebar-image-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 30%, rgba(11, 17, 32, 0.9));
            display: flex;
            align-items: flex-end;
            padding: 16px;
        }

        .sidebar-image-overlay span {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
        }

        .sidebar-tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .sidebar-tag-list a {
            padding: 6px 12px;
            border-radius: 14px;
            font-size: 11px;
            font-weight: 500;
            color: var(--text-secondary);
            background: rgba(59, 130, 246, 0.06);
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
        }

        .sidebar-tag-list a:hover {
            color: var(--accent-cyan);
            border-color: var(--border-glow);
            background: rgba(6, 182, 212, 0.08);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--glass-border);
            padding-block: 48px 24px;
            margin-top: 60px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.4px;
            color: var(--text-primary);
            display: inline-block;
            margin-bottom: 12px;
        }

        .footer-brand .footer-logo .accent {
            color: var(--accent-cyan);
        }

        .footer-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.2px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links li a {
            font-size: 13px;
            color: var(--text-muted);
            transition: all var(--transition-fast);
        }

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

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

        .footer-copy {
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-badges {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .footer-badge {
            display: inline-flex;
            align-items: center;
            padding: 5px 12px;
            border-radius: 14px;
            font-size: 11px;
            font-weight: 600;
            color: var(--text-secondary);
            background: rgba(59, 130, 246, 0.06);
            border: 1px solid var(--border-subtle);
        }

        /* FAB - Cyber & Neon Style */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 18px;
            background: rgba(7, 7, 13, 0.82);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(7, 7, 13, 0.82), rgba(7, 7, 13, 0.82)), linear-gradient(135deg, var(--accent-cyan), var(--accent-blue), var(--accent-cyan));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            box-shadow: var(--shadow-neon);
            cursor: pointer;
            transition: all var(--transition-smooth);
            opacity: 0.75;
            text-decoration: none;
            color: var(--accent-cyan);
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.08);
            box-shadow: 0 0 28px rgba(6, 182, 212, 0.6), 0 0 48px rgba(59, 130, 246, 0.3);
            color: #22d3ee;
        }

        .fab:active {
            transform: scale(0.95);
            box-shadow: 0 0 16px rgba(6, 182, 212, 0.4);
        }

        .fab i {
            font-size: 22px;
        }

        .fab-badge {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 14px;
            height: 14px;
            background: var(--accent-red);
            border-radius: 50%;
            border: 2px solid rgba(7, 7, 13, 0.9);
            animation: fabPulse 2s ease-in-out infinite;
        }

        @keyframes fabPulse {
            0%, 100% {
                box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.6);
            }
            50% {
                box-shadow: 0 0 0 6px rgba(239, 68, 68, 0);
            }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: minmax(0, 1fr) 280px;
                gap: 28px;
            }

            .article-title {
                font-size: 28px;
            }

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

            .footer-grid {
                grid-template-columns: 1.2fr 1fr 1fr;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            .article-page {
                padding-top: 76px;
                padding-bottom: 40px;
            }

            .article-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .article-sidebar {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
            }

            .sidebar-card {
                flex: 1 1 100%;
            }

            .article-title {
                font-size: 24px;
            }

            .article-header {
                padding: 24px;
            }

            .article-content {
                font-size: 15px;
            }

            .article-content h2 {
                font-size: 21px;
            }

            .article-content h3 {
                font-size: 17px;
            }

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

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

            .footer-brand {
                grid-column: 1 / -1;
            }

            .article-cta-section {
                padding: 24px;
            }

            .nav-wrapper {
                flex-wrap: wrap;
                gap: 10px;
            }

            .nav-links {
                order: 3;
                width: 100%;
                overflow-x: auto;
            }
        }

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

            .article-title {
                font-size: 21px;
            }

            .article-header {
                padding: 18px;
            }

            .article-meta {
                gap: 10px;
                font-size: 12px;
            }

            .article-cta-section {
                padding: 20px;
            }

            .article-cta-section h3 {
                font-size: 18px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

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

            .btn-login {
                padding: 8px 14px;
                font-size: 13px;
            }

            .btn-signup {
                padding: 8px 16px;
                font-size: 13px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0b1120;
            --bg-secondary: #111827;
            --bg-tertiary: #1a2035;
            --accent-blue: #3b82f6;
            --accent-cyan: #06b6d4;
            --accent-green: #10b981;
            --accent-red: #ef4444;
            --accent-gold: #f59e0b;
            --text-primary: #f8fafc;
            --text-secondary: #cbd5e1;
            --text-muted: #94a3b8;
            --border-subtle: rgba(59, 130, 246, 0.2);
            --border-glow: rgba(6, 182, 212, 0.4);
            --glass-bg: rgba(17, 24, 39, 0.72);
            --glass-border: rgba(148, 163, 184, 0.14);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-neon: 0 0 20px rgba(6, 182, 212, 0.45);
            --shadow-glow-blue: 0 0 24px rgba(59, 130, 246, 0.35);
            --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.55), 0 0 24px rgba(6, 182, 212, 0.18);
            --transition-fast: 160ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-smooth: 280ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-bounce: 380ms cubic-bezier(0.34, 1.56, 0.64, 1);
        }

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

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

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

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

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

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

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

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

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(11, 17, 32, 0.86);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--glass-border);
            transition: background var(--transition-smooth);
        }

        .site-header.scrolled {
            background: rgba(11, 17, 32, 0.95);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-block: 14px;
            gap: 20px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-logo-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.85), rgba(6, 182, 212, 0.85));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 16px;
            color: #fff;
            letter-spacing: -0.5px;
            box-shadow: var(--shadow-glow-blue);
            flex-shrink: 0;
        }

        .nav-logo-text {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: -0.3px;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .nav-logo-text .accent {
            color: var(--accent-cyan);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }

        .nav-link:hover {
            color: var(--text-primary);
            background: rgba(59, 130, 246, 0.1);
            border-color: var(--border-subtle);
        }

        .nav-link.active {
            color: var(--accent-cyan);
            background: rgba(6, 182, 212, 0.1);
            border-color: var(--border-glow);
            font-weight: 600;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .btn-login {
            padding: 9px 18px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            background: transparent;
            border: 1px solid rgba(6, 182, 212, 0.4);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-login:hover {
            background: rgba(6, 182, 212, 0.12);
            border-color: rgba(6, 182, 212, 0.6);
            color: var(--accent-cyan);
        }

        .btn-signup {
            padding: 9px 20px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 700;
            color: #ffffff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            cursor: pointer;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-glow-blue);
            white-space: nowrap;
        }

        .btn-signup:hover {
            box-shadow: var(--shadow-neon);
            transform: translateY(-1px);
        }

        .btn-signup:active {
            transform: translateY(1px);
            box-shadow: 0 0 12px rgba(6, 182, 212, 0.25);
        }

        /* Hero Section */
        .hero {
            padding-top: 130px;
            padding-bottom: 70px;
            background:
                radial-gradient(ellipse at 20% 20%, rgba(59, 130, 246, 0.15) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 60%, rgba(6, 182, 212, 0.12) 0%, transparent 50%),
                linear-gradient(180deg, #0b1120 0%, #111827 100%);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/ef2fedb2155d17e5.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            border-radius: 100px;
            background: rgba(6, 182, 212, 0.12);
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 20px;
        }

        .hero-badge i {
            font-size: 12px;
        }

        .hero h1 {
            font-size: 44px;
            font-weight: 900;
            line-height: 1.18;
            letter-spacing: -1px;
            color: var(--text-primary);
            margin-bottom: 20px;
        }

        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.65;
            max-width: 520px;
            margin-bottom: 28px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn-primary-hero {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            border-radius: 14px;
            font-size: 16px;
            font-weight: 700;
            color: #ffffff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            cursor: pointer;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-glow-blue);
        }

        .btn-primary-hero:hover {
            box-shadow: var(--shadow-neon);
            transform: translateY(-2px);
        }

        .btn-primary-hero:active {
            transform: translateY(0);
        }

        .btn-secondary-hero {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 24px;
            border-radius: 14px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-secondary);
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .btn-secondary-hero:hover {
            color: var(--text-primary);
            border-color: rgba(148, 163, 184, 0.35);
            background: rgba(17, 24, 39, 0.85);
        }

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

        .hero-visual-card {
            width: 100%;
            max-width: 460px;
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-xl);
            padding: 32px;
            box-shadow: var(--shadow-glass);
            position: relative;
            overflow: hidden;
        }

        .hero-visual-card::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -30%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.18) 0%, transparent 70%);
            pointer-events: none;
            border-radius: 50%;
        }

        .hero-visual-card img {
            border-radius: var(--radius-lg);
            width: 100%;
            height: auto;
            object-fit: cover;
            border: 1px solid var(--glass-border);
        }

        .hero-visual-label {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-top: 16px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            background: rgba(59, 130, 246, 0.08);
            border: 1px solid var(--border-subtle);
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .hero-visual-label i {
            color: var(--accent-cyan);
            font-size: 14px;
        }

        /* Section Common */
        section {
            padding-block: 60px;
        }

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

        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            letter-spacing: -0.5px;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .section-header p {
            font-size: 15px;
            color: var(--text-muted);
            max-width: 600px;
            line-height: 1.6;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 100px;
            background: rgba(59, 130, 246, 0.1);
            border: 1px solid var(--border-subtle);
            color: var(--accent-blue);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        /* Promo Cards */
        .promo-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
        }

        .promo-card {
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 24px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .promo-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }

        .promo-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--border-glow);
            transform: translateY(-3px);
        }

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

        .promo-card-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 16px;
            background: rgba(59, 130, 246, 0.12);
            border: 1px solid var(--border-subtle);
            color: var(--accent-cyan);
        }

        .promo-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: -0.2px;
        }

        .promo-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .promo-card-value {
            font-size: 28px;
            font-weight: 900;
            color: var(--accent-gold);
            letter-spacing: -0.5px;
            margin-bottom: 4px;
        }

        .promo-card-condition {
            font-size: 12px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* Steps / Process */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            counter-reset: step;
        }

        .step-item {
            padding: 24px;
            border-radius: var(--radius-lg);
            background: var(--bg-secondary);
            border: 1px solid var(--glass-border);
            position: relative;
            transition: all var(--transition-fast);
        }

        .step-item:hover {
            border-color: var(--border-glow);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 800;
            font-size: 15px;
            margin-bottom: 14px;
        }

        .step-item h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .step-item p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Data Strip */
        .data-strip {
            background: var(--bg-tertiary);
            border-block: 1px solid var(--glass-border);
            padding-block: 36px;
        }

        .data-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 24px;
            text-align: center;
        }

        .data-item .data-value {
            font-size: 34px;
            font-weight: 900;
            color: var(--accent-cyan);
            letter-spacing: -0.5px;
            line-height: 1.2;
        }

        .data-item .data-label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
            margin-top: 4px;
        }

        /* FAQ */
        .faq-section {
            background: var(--bg-secondary);
        }

        .faq-list {
            max-width: 760px;
            margin-inline: auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            background: var(--bg-primary);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

        .faq-item:hover {
            border-color: rgba(148, 163, 184, 0.3);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            background: transparent;
            border: none;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            transition: color var(--transition-fast);
        }

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

        .faq-question .faq-icon {
            flex-shrink: 0;
            color: var(--accent-cyan);
            font-size: 14px;
            transition: transform var(--transition-fast);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth);
        }

        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

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

        /* CTA Section */
        .cta-section {
            background:
                radial-gradient(ellipse at 50% 50%, rgba(59, 130, 246, 0.12) 0%, transparent 60%),
                var(--bg-primary);
            padding-block: 70px;
        }

        .cta-box {
            text-align: center;
            max-width: 680px;
            margin-inline: auto;
            padding: 48px 36px;
            border-radius: var(--radius-xl);
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--glass-border);
            box-shadow: var(--shadow-glass);
        }

        .cta-box h2 {
            font-size: 30px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 14px;
        }

        .cta-box p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 24px;
        }

        .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 32px;
            border-radius: 14px;
            font-size: 17px;
            font-weight: 700;
            color: #ffffff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            cursor: pointer;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-glow-blue);
        }

        .btn-cta-large:hover {
            box-shadow: var(--shadow-neon);
            transform: translateY(-2px);
        }

        /* News List */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
        }

        .news-card {
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }

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

        .news-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-bottom: 1px solid var(--glass-border);
        }

        .news-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card-category {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }

        .news-card-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-summary {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-date {
            font-size: 12px;
            color: var(--text-muted);
            font-weight: 500;
            margin-top: 12px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--glass-border);
            padding-block: 48px 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            display: inline-block;
            margin-bottom: 12px;
        }

        .footer-logo .accent {
            color: var(--accent-cyan);
        }

        .footer-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 340px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.2px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            font-size: 13px;
            color: var(--text-muted);
            transition: color var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--glass-border);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 14px;
        }

        .footer-copy {
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-badges {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 6px 12px;
            border-radius: 100px;
            background: rgba(59, 130, 246, 0.08);
            border: 1px solid var(--border-subtle);
            font-size: 11px;
            font-weight: 600;
            color: var(--text-secondary);
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(7, 7, 13, 0.8);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 22px;
            cursor: pointer;
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.45);
            transition: all var(--transition-smooth);
            opacity: 0.8;
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(6, 182, 212, 0.6);
        }

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

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

        @keyframes pulse-dot {
            0%, 100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.6;
                transform: scale(1.2);
            }
        }

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

            .hero h1 {
                font-size: 36px;
            }

            .hero-visual-card {
                max-width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            section {
                padding-block: 44px;
            }

            .nav-wrapper {
                gap: 12px;
                flex-wrap: nowrap;
            }

            .nav-logo-text {
                font-size: 16px;
            }

            .nav-links {
                gap: 3px;
            }

            .nav-link {
                padding: 8px 12px;
                font-size: 12px;
            }

            .btn-login {
                padding: 7px 14px;
                font-size: 12px;
            }

            .btn-signup {
                padding: 7px 14px;
                font-size: 12px;
            }

            .hero {
                padding-top: 110px;
                padding-bottom: 50px;
            }

            .hero h1 {
                font-size: 30px;
            }

            .hero-subtitle {
                font-size: 15px;
            }

            .section-header h2 {
                font-size: 26px;
            }

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

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

            .data-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .data-item .data-value {
                font-size: 28px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

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

            .fab {
                left: 12px;
                bottom: 80px;
                width: 48px;
                height: 48px;
                font-size: 18px;
            }
        }

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

            .nav-wrapper {
                padding-block: 10px;
                gap: 8px;
            }

            .nav-logo-icon {
                width: 36px;
                height: 36px;
                font-size: 13px;
                border-radius: 10px;
            }

            .nav-logo-text {
                font-size: 14px;
            }

            .nav-link {
                padding: 7px 10px;
                font-size: 11px;
                border-radius: 8px;
            }

            .btn-login {
                padding: 6px 11px;
                font-size: 11px;
                border-radius: 8px;
            }

            .btn-signup {
                padding: 6px 11px;
                font-size: 11px;
                border-radius: 8px;
            }

            .hero {
                padding-top: 100px;
                padding-bottom: 40px;
            }

            .hero h1 {
                font-size: 26px;
            }

            .hero-subtitle {
                font-size: 14px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .btn-primary-hero,
            .btn-secondary-hero {
                justify-content: center;
                width: 100%;
                padding: 12px 20px;
                font-size: 15px;
            }

            .section-header h2 {
                font-size: 22px;
            }

            .promo-card {
                padding: 18px;
            }

            .promo-card-value {
                font-size: 24px;
            }

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

            .cta-box {
                padding: 32px 20px;
            }

            .cta-box h2 {
                font-size: 24px;
            }

            .btn-cta-large {
                width: 100%;
                justify-content: center;
                padding: 14px 24px;
                font-size: 15px;
            }

            .faq-question {
                padding: 14px 16px;
                font-size: 14px;
            }

            .faq-answer-inner {
                padding: 0 16px 16px;
                font-size: 13px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0b1120;
            --bg-secondary: #111827;
            --bg-tertiary: #1a2035;
            --accent-blue: #3b82f6;
            --accent-cyan: #06b6d4;
            --accent-green: #10b981;
            --accent-red: #ef4444;
            --accent-gold: #f59e0b;
            --text-primary: #f8fafc;
            --text-secondary: #cbd5e1;
            --text-muted: #94a3b8;
            --border-subtle: rgba(59, 130, 246, 0.2);
            --border-glow: rgba(6, 182, 212, 0.4);
            --glass-bg: rgba(17, 24, 39, 0.72);
            --glass-border: rgba(148, 163, 184, 0.14);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-neon: 0 0 20px rgba(6, 182, 212, 0.45);
            --shadow-glow-blue: 0 0 24px rgba(59, 130, 246, 0.35);
            --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.55), 0 0 24px rgba(6, 182, 212, 0.18);
            --transition-fast: 160ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-smooth: 280ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-bounce: 380ms cubic-bezier(0.34, 1.56, 0.64, 1);
        }

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

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }
        button:focus-visible, a:focus-visible, input:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

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

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(11, 17, 32, 0.86);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--glass-border);
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
        }
        .site-header.scrolled {
            background: rgba(11, 17, 32, 0.96);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-block: 14px;
            gap: 20px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .nav-logo-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.85), rgba(6, 182, 212, 0.85));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 16px;
            color: #fff;
            letter-spacing: -0.5px;
            box-shadow: var(--shadow-glow-blue);
            flex-shrink: 0;
        }
        .nav-logo-text {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: -0.3px;
            color: var(--text-primary);
            white-space: nowrap;
        }
        .nav-logo-text .accent {
            color: var(--accent-cyan);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .nav-links::-webkit-scrollbar {
            display: none;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }
        .nav-link:hover {
            color: var(--text-primary);
            background: rgba(59, 130, 246, 0.1);
            border-color: var(--border-subtle);
        }
        .nav-link.active {
            color: var(--accent-cyan);
            background: rgba(6, 182, 212, 0.1);
            border-color: var(--border-glow);
            font-weight: 600;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .btn-login {
            padding: 9px 18px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            background: transparent;
            border: 1px solid rgba(6, 182, 212, 0.4);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-login:hover {
            background: rgba(6, 182, 212, 0.1);
            border-color: var(--accent-cyan);
            color: var(--text-primary);
        }
        .btn-signup {
            padding: 9px 20px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, #3b82f6, #06b6d4);
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.35);
            white-space: nowrap;
        }
        .btn-signup:hover {
            box-shadow: 0 0 30px rgba(6, 182, 212, 0.55);
            transform: translateY(-1px);
            color: #fff;
        }
        .btn-signup:active {
            transform: translateY(0);
            box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
        }

        /* Hero */
        .category-hero {
            position: relative;
            padding: 140px 0 80px;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.12) 0%, rgba(6, 182, 212, 0.06) 50%, rgba(16, 185, 129, 0.05) 100%);
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -15%;
            width: 550px;
            height: 550px;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.18) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-skew-bar {
            position: absolute;
            top: 120px;
            right: 0;
            width: 68%;
            height: 100%;
            background: linear-gradient(120deg, transparent 0%, rgba(59, 130, 246, 0.08) 40%, rgba(6, 182, 212, 0.1) 60%, transparent 100%);
            transform: skewX(-8deg);
            transform-origin: top right;
            pointer-events: none;
        }
        .hero-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            border-radius: 999px;
            background: rgba(6, 182, 212, 0.1);
            border: 1px solid rgba(6, 182, 212, 0.3);
            color: var(--accent-cyan);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 20px;
            text-transform: uppercase;
        }
        .hero-badge i {
            font-size: 12px;
        }
        .hero-title {
            font-size: 44px;
            font-weight: 900;
            line-height: 1.2;
            letter-spacing: -0.8px;
            margin-bottom: 20px;
            color: var(--text-primary);
        }
        .hero-title .gradient-text {
            background: linear-gradient(135deg, #3b82f6, #06b6d4, #10b981);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 28px;
            max-width: 520px;
        }
        .hero-cta-group {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary-lg {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 15px 32px;
            border-radius: 14px;
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, #3b82f6, #06b6d4);
            border: none;
            cursor: pointer;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 30px rgba(6, 182, 212, 0.35);
            white-space: nowrap;
        }
        .btn-primary-lg:hover {
            box-shadow: 0 0 45px rgba(6, 182, 212, 0.55);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-primary-lg:active {
            transform: translateY(0);
        }
        .btn-ghost-lg {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 15px 28px;
            border-radius: 14px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-secondary);
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-ghost-lg:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(6, 182, 212, 0.08);
        }
        .hero-visual {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-glass);
            border: 1px solid var(--glass-border);
        }
        .hero-visual img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            border-radius: var(--radius-xl);
        }
        .hero-visual-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 17, 32, 0.2) 0%, rgba(11, 17, 32, 0.75) 100%);
            display: flex;
            align-items: flex-end;
            padding: 24px;
            border-radius: var(--radius-xl);
        }
        .hero-visual-stats {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .hero-stat {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            background: rgba(11, 17, 32, 0.6);
            backdrop-filter: blur(8px);
            padding: 10px 16px;
            border-radius: 10px;
            border: 1px solid rgba(148, 163, 184, 0.2);
        }
        .hero-stat i {
            color: var(--accent-cyan);
        }

        /* Sections */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-secondary);
        }
        .section-header {
            margin-bottom: 44px;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 800;
            letter-spacing: -0.4px;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 14px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.6;
            max-width: 650px;
        }

        /* Stats row */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 48px;
        }
        .stat-block {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: left;
            transition: all var(--transition-smooth);
        }
        .stat-block:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glass);
        }
        .stat-value {
            font-size: 32px;
            font-weight: 900;
            letter-spacing: -0.5px;
            color: var(--accent-cyan);
            margin-bottom: 6px;
            line-height: 1.1;
        }
        .stat-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            line-height: 1.4;
        }

        /* Feature cards */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, #3b82f6, #06b6d4, #10b981);
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }
        .feature-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(6, 182, 212, 0.2));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--accent-cyan);
            margin-bottom: 18px;
            box-shadow: 0 0 12px rgba(6, 182, 212, 0.15);
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            letter-spacing: -0.2px;
        }
        .feature-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* Game showcase */
        .game-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .game-card {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-smooth);
            cursor: pointer;
        }
        .game-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-6px) scale(1.02);
        }
        .game-card-img {
            position: relative;
            aspect-ratio: 16/10;
            overflow: hidden;
        }
        .game-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }
        .game-card:hover .game-card-img img {
            transform: scale(1.08);
        }
        .game-card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            border-radius: 6px;
            font-size: 11px;
            font-weight: 700;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            background: rgba(11, 17, 32, 0.85);
            color: var(--accent-cyan);
            border: 1px solid rgba(6, 182, 212, 0.4);
            backdrop-filter: blur(6px);
        }
        .game-card-body {
            padding: 16px 18px;
        }
        .game-card-body h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .game-card-body p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.4;
        }

        /* Process */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 16px;
        }
        .process-step {
            background: transparent;
            border-radius: var(--radius-lg);
            padding: 24px 8px;
            position: relative;
            text-align: left;
            transition: all var(--transition-smooth);
        }
        .process-step:hover {
            background: var(--glass-bg);
            border-color: var(--border-glow);
        }
        .process-step-num {
            font-size: 48px;
            font-weight: 900;
            color: rgba(6, 182, 212, 0.2);
            letter-spacing: -1.5px;
            line-height: 1;
            margin-bottom: 14px;
            transition: color var(--transition-smooth);
        }
        .process-step:hover .process-step-num {
            color: rgba(6, 182, 212, 0.5);
        }
        .process-step h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* Testimonials */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .testimonial-card {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            transition: all var(--transition-smooth);
        }
        .testimonial-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glass);
        }
        .testimonial-quote {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 20px;
            position: relative;
            padding-left: 18px;
        }
        .testimonial-quote::before {
            content: '\201C';
            position: absolute;
            left: 0;
            top: -4px;
            font-size: 40px;
            color: rgba(6, 182, 212, 0.3);
            font-weight: 900;
            line-height: 1;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testimonial-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, #3b82f6, #06b6d4);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            flex-shrink: 0;
        }
        .testimonial-name {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
        }
        .testimonial-role {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
        }
        .faq-item {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--border-subtle);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            background: transparent;
            border: none;
            cursor: pointer;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            transition: all var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--accent-cyan);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--accent-cyan);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
            padding: 0 22px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 20px;
        }
        .faq-answer p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* CTA */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(6, 182, 212, 0.1) 50%, rgba(16, 185, 129, 0.08) 100%);
            border-top: 1px solid var(--glass-border);
            border-bottom: 1px solid var(--glass-border);
        }
        .cta-panel {
            background: var(--glass-bg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            text-align: center;
            box-shadow: var(--shadow-glass);
            position: relative;
            overflow: hidden;
        }
        .cta-panel::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-panel h2 {
            font-size: 30px;
            font-weight: 800;
            letter-spacing: -0.4px;
            color: var(--text-primary);
            margin-bottom: 14px;
            position: relative;
            z-index: 2;
        }
        .cta-panel p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 600px;
            margin-inline: auto;
            position: relative;
            z-index: 2;
        }
        .cta-panel .btn-primary-lg {
            position: relative;
            z-index: 2;
        }

        /* News list */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .news-card {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: all var(--transition-smooth);
        }
        .news-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glass);
            transform: translateY(-3px);
        }
        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 10px;
            flex-wrap: wrap;
        }
        .news-card-meta i {
            color: var(--accent-cyan);
            font-size: 11px;
        }
        .news-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
            transition: color var(--transition-fast);
        }
        .news-card:hover h3 {
            color: var(--accent-cyan);
        }
        .news-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.5;
        }
        .news-empty {
            text-align: left;
            color: var(--text-muted);
            font-size: 15px;
            padding: 20px 0;
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            width: 56px;
            height: 56px;
            border-radius: 18px;
            background: rgba(7, 7, 13, 0.8);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(7,7,13,0.8), rgba(7,7,13,0.8)), linear-gradient(135deg, #3b82f6, #06b6d4);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 22px;
            cursor: pointer;
            z-index: 50;
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.45);
            transition: all var(--transition-smooth);
            animation: fab-pulse 2.5s ease-in-out infinite;
        }
        .fab:hover {
            box-shadow: 0 0 35px rgba(6, 182, 212, 0.7);
            transform: scale(1.1);
            opacity: 1;
            color: #fff;
        }
        .fab:active {
            transform: scale(0.95);
            transition-duration: 100ms;
        }
        .fab-notification {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: #ef4444;
            border: 2px solid rgba(7, 7, 13, 0.9);
            box-shadow: 0 0 10px rgba(239, 68, 68, 0.7);
            animation: fab-dot-pulse 1.8s ease-in-out infinite;
        }
        @keyframes fab-pulse {
            0%, 100% {
                box-shadow: 0 0 20px rgba(6, 182, 212, 0.45);
            }
            50% {
                box-shadow: 0 0 35px rgba(6, 182, 212, 0.65);
            }
        }
        @keyframes fab-dot-pulse {
            0%, 100% {
                opacity: 1;
            }
            50% {
                opacity: 0.4;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--glass-border);
            padding: 56px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .footer-logo {
            font-size: 24px;
            font-weight: 900;
            letter-spacing: -0.4px;
            color: var(--text-primary);
            display: block;
            margin-bottom: 12px;
        }
        .footer-brand .footer-logo .accent {
            color: var(--accent-cyan);
        }
        .footer-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--text-muted);
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-links a:hover {
            color: var(--accent-cyan);
            transform: translateX(4px);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding-top: 24px;
            border-top: 1px solid var(--glass-border);
            flex-wrap: wrap;
        }
        .footer-copy {
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-badges {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 8px;
            font-size: 12px;
            font-weight: 600;
            color: var(--text-secondary);
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            white-space: nowrap;
        }
        .footer-badge i {
            color: var(--accent-cyan);
            font-size: 10px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .hero-title {
                font-size: 36px;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .game-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-inline: 16px;
            }
            .site-header {
                padding-block: 4px;
            }
            .nav-wrapper {
                padding-block: 10px;
                gap: 12px;
                flex-wrap: nowrap;
            }
            .nav-logo-text {
                font-size: 16px;
                letter-spacing: -0.2px;
            }
            .nav-logo-icon {
                width: 36px;
                height: 36px;
                font-size: 13px;
                border-radius: 10px;
            }
            .nav-links {
                gap: 3px;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                padding-bottom: 2px;
            }
            .nav-link {
                padding: 7px 12px;
                font-size: 12px;
                white-space: nowrap;
            }
            .btn-login {
                padding: 7px 12px;
                font-size: 12px;
            }
            .btn-signup {
                padding: 7px 14px;
                font-size: 12px;
            }
            .nav-actions {
                gap: 6px;
            }
            .category-hero {
                padding: 110px 0 56px;
            }
            .hero-title {
                font-size: 28px;
            }
            .hero-desc {
                font-size: 15px;
            }
            .hero-visual img {
                height: 240px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .stat-block {
                padding: 18px 16px;
            }
            .stat-value {
                font-size: 26px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .feature-card {
                padding: 22px 18px;
            }
            .game-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .game-card-img {
                aspect-ratio: 16/11;
            }
            .process-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .news-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .cta-panel {
                padding: 32px 22px;
            }
            .cta-panel h2 {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 14px;
            }
            .fab {
                width: 50px;
                height: 50px;
                border-radius: 16px;
                left: 12px;
                bottom: 80px;
                font-size: 20px;
            }
        }

        @media (max-width: 520px) {
            .nav-logo-text {
                font-size: 14px;
            }
            .nav-logo-icon {
                width: 32px;
                height: 32px;
                font-size: 11px;
                border-radius: 8px;
            }
            .nav-wrapper {
                gap: 8px;
            }
            .nav-link {
                padding: 6px 10px;
                font-size: 11px;
            }
            .btn-login {
                padding: 6px 10px;
                font-size: 11px;
            }
            .btn-signup {
                padding: 6px 12px;
                font-size: 11px;
            }
            .hero-title {
                font-size: 24px;
            }
            .hero-desc {
                font-size: 14px;
            }
            .hero-visual img {
                height: 200px;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-block {
                padding: 14px 12px;
            }
            .stat-value {
                font-size: 22px;
            }
            .section-title {
                font-size: 22px;
            }
            .game-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .btn-primary-lg {
                padding: 12px 24px;
                font-size: 14px;
            }
            .btn-ghost-lg {
                padding: 12px 20px;
                font-size: 14px;
            }
        }