/* roulang page: index */
:root {
            --bg-primary: #0A2E1C;
            --bg-secondary: #123E25;
            --bg-deep: #071F12;
            --gold: #FFD700;
            --gold-soft: #FFE066;
            --gold-dark: #C9A300;
            --red: #D32F2F;
            --red-bright: #F44336;
            --white: #FFFFFF;
            --mint: #D1F2EB;
            --mint-soft: #E8F8F2;
            --text: #FFFFFF;
            --text-muted: #B8D8CB;
            --border-gold: rgba(255, 215, 0, 0.45);
            --shadow-gold: 0 8px 30px rgba(255, 215, 0, 0.12);
            --shadow-card: 0 6px 24px rgba(0, 0, 0, 0.35);
            --radius-sm: 10px;
            --radius-md: 18px;
            --radius-lg: 28px;
            --radius-xl: 40px;
            --container: 1200px;
            --font-main: 'Inter', 'Segoe UI', 'Roboto', system-ui, -apple-system, sans-serif;
        }

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

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

        body {
            font-family: var(--font-main);
            background: var(--bg-primary);
            color: var(--text);
            line-height: 1.6;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease, opacity 0.25s ease, border-color 0.25s ease;
        }

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

        button {
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }

        :focus-visible {
            outline: 3px solid var(--gold);
            outline-offset: 3px;
            border-radius: 4px;
        }

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

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 46, 28, 0.94);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-gold);
            padding: 0 24px;
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            background: rgba(7, 31, 18, 0.98);
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
        }

        .nav-container {
            max-width: var(--container);
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--gold);
            letter-spacing: 0.3px;
            line-height: 1.25;
            max-width: 280px;
            flex-shrink: 0;
        }

        .nav-logo .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(145deg, var(--gold), var(--gold-dark));
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-deep);
            font-size: 1.4rem;
            flex-shrink: 0;
            box-shadow: 0 0 16px rgba(255, 215, 0, 0.35);
        }

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

        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 10px 18px;
            font-weight: 600;
            font-size: 0.92rem;
            color: var(--mint);
            border-radius: 40px;
            transition: all 0.25s ease;
            position: relative;
        }

        .nav-links a:hover {
            color: var(--gold);
            background: rgba(255, 215, 0, 0.08);
        }

        .nav-links a.active {
            color: var(--bg-deep);
            background: var(--gold);
            font-weight: 700;
            box-shadow: 0 4px 16px rgba(255, 215, 0, 0.3);
        }

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

        .btn-login {
            padding: 10px 20px;
            font-weight: 600;
            font-size: 0.92rem;
            color: var(--mint);
            border-radius: 40px;
            border: 1px solid var(--border-gold);
            transition: all 0.25s ease;
            background: transparent;
        }

        .btn-login:hover {
            border-color: var(--gold);
            color: var(--gold);
            background: rgba(255, 215, 0, 0.06);
        }

        .btn-signup {
            padding: 10px 24px;
            font-weight: 700;
            font-size: 0.92rem;
            color: var(--bg-deep);
            background: var(--gold);
            border-radius: 40px;
            box-shadow: 0 4px 16px rgba(255, 215, 0, 0.4);
            transition: all 0.3s ease;
        }

        .btn-signup:hover {
            background: var(--gold-soft);
            box-shadow: 0 6px 24px rgba(255, 215, 0, 0.55);
            transform: translateY(-2px);
        }

        .btn-signup:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(255, 215, 0, 0.3);
        }

        .mobile-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            background: rgba(255, 215, 0, 0.1);
            border-radius: 12px;
            color: var(--gold);
            font-size: 1.5rem;
            flex-shrink: 0;
        }

        /* Hero */
        .hero {
            padding: 140px 0 80px;
            background: linear-gradient(160deg, var(--bg-deep) 0%, var(--bg-primary) 45%, var(--bg-secondary) 100%);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -100px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255, 215, 0, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -60px;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(211, 47, 47, 0.18) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-inner {
            display: grid;
            grid-template-columns: 1fr 0.9fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-content {
            max-width: 620px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            background: rgba(255, 215, 0, 0.12);
            border: 1px solid var(--border-gold);
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--gold);
            margin-bottom: 22px;
            letter-spacing: 0.3px;
        }

        .hero h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 22px;
            color: var(--white);
        }

        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--gold), var(--gold-soft));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero-subtitle {
            font-size: 1.1rem;
            color: var(--mint);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 540px;
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 32px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 32px;
            font-weight: 700;
            font-size: 1rem;
            color: var(--bg-deep);
            background: var(--gold);
            border-radius: 50px;
            box-shadow: 0 6px 24px rgba(255, 215, 0, 0.45);
            transition: all 0.3s ease;
        }

        .btn-primary:hover {
            background: var(--gold-soft);
            box-shadow: 0 10px 32px rgba(255, 215, 0, 0.6);
            transform: translateY(-2px);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 32px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--mint);
            background: transparent;
            border: 1px solid var(--border-gold);
            border-radius: 50px;
            transition: all 0.3s ease;
        }

        .btn-secondary:hover {
            border-color: var(--gold);
            color: var(--gold);
            background: rgba(255, 215, 0, 0.06);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
            padding-top: 12px;
        }

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

        .hero-stat .stat-value {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--gold);
            display: block;
            line-height: 1.2;
        }

        .hero-stat .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .hero-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-gold);
        }

        .hero-visual img {
            width: 100%;
            height: 420px;
            object-fit: cover;
            display: block;
        }

        .hero-visual .hero-visual-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(7, 31, 18, 0.85) 0%, transparent 55%);
            display: flex;
            align-items: flex-end;
            padding: 28px;
        }

        .hero-visual .hero-visual-text {
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--gold);
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.6);
        }

        /* Sections */
        .section {
            padding: 76px 0;
        }

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

        .section-header {
            margin-bottom: 44px;
            max-width: 760px;
        }

        .section-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 215, 0, 0.1);
            border: 1px solid var(--border-gold);
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.8rem;
            color: var(--gold);
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: clamp(1.7rem, 3.5vw, 2.5rem);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: var(--white);
            margin-bottom: 14px;
        }

        .section-desc {
            font-size: 1.02rem;
            color: var(--mint);
            line-height: 1.7;
        }

        /* Feature Grid */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }

        .feature-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 215, 0, 0.18);
            border-radius: var(--radius-md);
            padding: 28px 26px;
            transition: all 0.3s ease;
        }

        .feature-item:hover {
            border-color: var(--gold);
            background: rgba(255, 215, 0, 0.07);
            transform: translateY(-4px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            background: linear-gradient(145deg, rgba(255, 215, 0, 0.2), rgba(255, 215, 0, 0.05));
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin-bottom: 18px;
            color: var(--gold);
        }

        .feature-item h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 10px;
            line-height: 1.35;
        }

        .feature-item p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* Promo Section */
        .promo-section {
            background: linear-gradient(135deg, #5C1A1A 0%, #3A0E0E 100%);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(255, 215, 0, 0.35);
        }

        .promo-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 250px;
            height: 250px;
            background: radial-gradient(circle, rgba(255, 215, 0, 0.2) 0%, transparent 70%);
            border-radius: 50%;
        }

        .promo-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .promo-content h3 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--gold);
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .promo-content p {
            color: #F8E7D1;
            font-size: 1rem;
            line-height: 1.7;
            margin-bottom: 24px;
        }

        .promo-benefits {
            list-style: none;
            margin-bottom: 28px;
        }

        .promo-benefits li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: #F8E7D1;
            font-size: 0.95rem;
            margin-bottom: 10px;
        }

        .promo-benefits li::before {
            content: '✦';
            color: var(--gold);
            font-weight: bold;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .promo-visual img {
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 215, 0, 0.35);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.5);
            height: 320px;
            width: 100%;
            object-fit: cover;
        }

        /* Campaign Section */
        .campaign-section {
            background: linear-gradient(150deg, #0A2E1C 0%, #0D3B22 50%, #123E25 100%);
            border-radius: var(--radius-lg);
            padding: 44px 40px;
            border: 1px solid var(--border-gold);
            position: relative;
            overflow: hidden;
        }

        .campaign-grid {
            display: grid;
            grid-template-columns: 1fr 0.8fr;
            gap: 36px;
            align-items: center;
        }

        .campaign-content h3 {
            font-size: 1.7rem;
            font-weight: 800;
            color: var(--gold);
            margin-bottom: 12px;
        }

        .campaign-content p {
            color: var(--mint);
            font-size: 1rem;
            line-height: 1.7;
            margin-bottom: 22px;
        }

        .campaign-rewards {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 26px;
        }

        .reward-chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            background: rgba(255, 215, 0, 0.1);
            border: 1px solid var(--border-gold);
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--gold-soft);
        }

        .campaign-visual img {
            border-radius: var(--radius-md);
            border: 1px solid var(--border-gold);
            height: 280px;
            width: 100%;
            object-fit: cover;
            box-shadow: var(--shadow-card);
        }

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

        .timeline::before {
            content: '';
            position: absolute;
            left: 10px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: linear-gradient(to bottom, var(--gold), rgba(255, 215, 0, 0.2));
        }

        .timeline-item {
            position: relative;
            margin-bottom: 32px;
            padding-left: 20px;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -28px;
            top: 6px;
            width: 14px;
            height: 14px;
            background: var(--gold);
            border-radius: 50%;
            border: 3px solid var(--bg-deep);
            box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.35);
        }

        .timeline-time {
            font-weight: 700;
            font-size: 0.85rem;
            color: var(--gold);
            margin-bottom: 4px;
            letter-spacing: 0.5px;
        }

        .timeline-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 6px;
        }

        .timeline-item p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* Activity Wall */
        .activity-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .activity-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 215, 0, 0.18);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .activity-card:hover {
            border-color: var(--gold);
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
        }

        .activity-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .activity-body {
            padding: 22px 24px;
        }

        .activity-body h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 8px;
        }

        .activity-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .activity-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--gold);
        }

        .activity-cta:hover {
            color: var(--gold-soft);
        }

        /* Info Section */
        .info-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            align-items: start;
        }

        .info-content h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--gold);
            margin-bottom: 12px;
        }

        .info-content p {
            font-size: 0.98rem;
            color: var(--mint);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .info-list {
            list-style: none;
        }

        .info-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--mint);
            margin-bottom: 12px;
            line-height: 1.6;
        }

        .info-list li::before {
            content: '✓';
            color: var(--gold);
            font-weight: 700;
            flex-shrink: 0;
            margin-top: 1px;
        }

        .info-side-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-gold);
            box-shadow: var(--shadow-card);
        }

        .info-side-image img {
            width: 100%;
            height: 300px;
            object-fit: cover;
        }

        /* CMS List */
        .cms-list {
            display: grid;
            grid-template-columns: 1fr 0.7fr;
            gap: 32px;
        }

        .cms-main-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .cms-main-list li a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 215, 0, 0.15);
            border-radius: var(--radius-sm);
            transition: all 0.3s ease;
        }

        .cms-main-list li a:hover {
            border-color: var(--gold);
            background: rgba(255, 215, 0, 0.07);
            transform: translateX(4px);
        }

        .cms-main-list .cms-title {
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--white);
            line-height: 1.45;
        }

        .cms-main-list .cms-date {
            font-size: 0.82rem;
            color: var(--text-muted);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .cms-side {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 215, 0, 0.18);
            border-radius: var(--radius-md);
            padding: 26px;
        }

        .cms-side h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--gold);
            margin-bottom: 16px;
        }

        .cms-side-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .cms-side-list li a {
            display: block;
            font-size: 0.9rem;
            color: var(--mint);
            line-height: 1.5;
            padding-bottom: 10px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: color 0.25s ease;
        }

        .cms-side-list li a:hover {
            color: var(--gold);
        }

        .cms-empty {
            padding: 24px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 215, 0, 0.15);
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* Changelog */
        .changelog {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .changelog-item {
            display: grid;
            grid-template-columns: 140px 1fr;
            gap: 20px;
            padding: 22px 26px;
            background: rgba(255, 255, 255, 0.04);
            border-left: 3px solid var(--gold);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            transition: all 0.3s ease;
        }

        .changelog-item:hover {
            background: rgba(255, 215, 0, 0.06);
            border-left-color: var(--gold-soft);
        }

        .changelog-version {
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--gold);
            letter-spacing: 0.5px;
        }

        .changelog-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 6px;
        }

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

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 215, 0, 0.18);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            transition: all 0.3s ease;
        }

        .faq-item:hover {
            border-color: var(--gold);
            background: rgba(255, 215, 0, 0.05);
        }

        .faq-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--gold);
            margin-bottom: 10px;
        }

        .faq-item p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #3A0E0E 0%, #5C1A1A 100%);
            border-radius: var(--radius-lg);
            padding: 56px 44px;
            text-align: center;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(255, 215, 0, 0.4);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            left: 50%;
            transform: translateX(-50%);
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 215, 0, 0.15) 0%, transparent 70%);
            border-radius: 50%;
        }

        .cta-section h3 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--gold);
            margin-bottom: 16px;
            position: relative;
            z-index: 2;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: #F8E7D1;
            line-height: 1.7;
            max-width: 600px;
            margin: 0 auto 30px;
            position: relative;
            z-index: 2;
        }

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

        /* Footer */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--border-gold);
            padding: 48px 0 28px;
            margin-top: 60px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand h4 {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--gold);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 380px;
        }

        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--gold);
            margin-bottom: 16px;
        }

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

        .footer-col ul li a {
            font-size: 0.9rem;
            color: var(--mint);
            transition: color 0.25s ease;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 215, 0, 0.2);
            padding-top: 22px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
        }

        .footer-bottom p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

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

        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            background: rgba(255, 215, 0, 0.08);
            border: 1px solid var(--border-gold);
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--gold);
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            background: linear-gradient(145deg, #1A0A00, #0D0500);
            border: 2px solid var(--gold);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--gold);
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            opacity: 0.7;
            transition: all 0.3s ease;
            cursor: pointer;
            animation: fabBreath 3s ease-in-out infinite;
        }

        .fab-left:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 8px 30px rgba(255, 215, 0, 0.5);
        }

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

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

        @keyframes fabBreath {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.04); }
        }

        @keyframes blinkDot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.35; }
        }

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

            .hero-content {
                max-width: 100%;
            }

            .hero-visual img {
                height: 320px;
            }

            .promo-grid,
            .campaign-grid,
            .info-grid,
            .cms-list {
                grid-template-columns: 1fr;
            }

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

        @media (max-width: 768px) {
            .nav-container {
                height: 64px;
            }

            .nav-logo {
                font-size: 1rem;
                max-width: 200px;
            }

            .nav-logo .logo-icon {
                width: 36px;
                height: 36px;
                font-size: 1.2rem;
            }

            .nav-links {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(7, 31, 18, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: flex-start;
                padding: 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border-gold);
                display: none;
                z-index: 999;
            }

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

            .nav-links a {
                width: 100%;
                padding: 14px 18px;
                font-size: 1rem;
            }

            .mobile-toggle {
                display: flex;
            }

            .nav-actions {
                gap: 6px;
            }

            .btn-login {
                padding: 8px 14px;
                font-size: 0.82rem;
            }

            .btn-signup {
                padding: 8px 16px;
                font-size: 0.82rem;
            }

            .hero {
                padding: 100px 0 60px;
            }

            .hero h1 {
                font-size: 1.8rem;
            }

            .hero-subtitle {
                font-size: 0.98rem;
            }

            .hero-stats {
                gap: 18px;
            }

            .hero-visual img {
                height: 240px;
            }

            .section {
                padding: 52px 0;
            }

            .promo-section,
            .campaign-section {
                padding: 32px 24px;
            }

            .changelog-item {
                grid-template-columns: 1fr;
                gap: 8px;
                padding: 18px 20px;
            }

            .timeline {
                padding-left: 24px;
            }

            .timeline-item {
                padding-left: 12px;
            }

            .timeline-item::before {
                left: -22px;
                width: 12px;
                height: 12px;
            }

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

            .cta-section {
                padding: 40px 24px;
            }

            .cta-section h3 {
                font-size: 1.5rem;
            }

            .fab-left {
                width: 48px;
                height: 48px;
                left: 12px;
                bottom: 80px;
                font-size: 1.3rem;
            }
        }

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

            .site-header {
                padding: 0 16px;
            }

            .nav-logo {
                font-size: 0.85rem;
                max-width: 150px;
            }

            .nav-logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }

            .btn-login {
                padding: 6px 10px;
                font-size: 0.75rem;
            }

            .btn-signup {
                padding: 6px 12px;
                font-size: 0.75rem;
            }

            .hero h1 {
                font-size: 1.5rem;
            }

            .hero-cta-group {
                flex-direction: column;
                width: 100%;
            }

            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
                padding: 14px 24px;
            }

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

            .feature-grid,
            .activity-grid {
                grid-template-columns: 1fr;
            }

            .cms-main-list li a {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

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

/* roulang page: article */
:root {
            --bg-primary: #0A2E1C;
            --bg-secondary: #123E25;
            --bg-card: #0F3522;
            --accent-gold: #FFD700;
            --accent-red: #D32F2F;
            --text-white: #FFFFFF;
            --text-pale: #D1F2EB;
            --text-muted: #A9C5B8;
            --border-gold: rgba(255, 215, 0, 0.35);
            --shadow-soft: 0 8px 28px rgba(0, 0, 0, 0.35);
            --shadow-gold: 0 0 18px rgba(255, 215, 0, 0.22);
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-sm: 9px;
            --transition: all 0.28s ease;
            --font-main: 'Be Vietnam Pro', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

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

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

        body {
            font-family: var(--font-main);
            background: var(--bg-primary);
            color: var(--text-pale);
            line-height: 1.62;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            font-size: 16px;
            letter-spacing: 0.01em;
        }

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

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

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

        .container {
            width: min(1180px, 92%);
            margin: 0 auto;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(10, 46, 28, 0.94);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 215, 0, 0.18);
            box-shadow: 0 6px 22px rgba(0, 0, 0, 0.28);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            padding: 14px 0;
            flex-wrap: wrap;
        }

        .logo {
            font-weight: 800;
            font-size: 1.28rem;
            color: var(--accent-gold);
            letter-spacing: 0.02em;
            line-height: 1.3;
            text-shadow: 0 0 14px rgba(255, 215, 0, 0.25);
            max-width: 540px;
        }

        .logo span {
            display: block;
            font-size: 0.72rem;
            font-weight: 500;
            color: var(--text-muted);
            letter-spacing: 0.14em;
            text-transform: uppercase;
            margin-top: 2px;
            text-shadow: none;
        }

        .nav-links {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .nav-links li a {
            display: inline-flex;
            align-items: center;
            padding: 9px 16px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.92rem;
            color: var(--text-pale);
            border: 1px solid transparent;
            transition: var(--transition);
            background: transparent;
        }

        .nav-links li a:hover {
            background: rgba(255, 215, 0, 0.1);
            border-color: rgba(255, 215, 0, 0.3);
            color: var(--accent-gold);
        }

        .nav-links li a.active {
            background: var(--accent-gold);
            color: #1A2E1C;
            border-color: var(--accent-gold);
            box-shadow: 0 4px 14px rgba(255, 215, 0, 0.3);
        }

        .nav-auth {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .btn-login {
            padding: 9px 18px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--text-white);
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            cursor: pointer;
            transition: var(--transition);
        }

        .btn-login:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--text-white);
        }

        .btn-signup {
            padding: 10px 22px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 0.9rem;
            background: var(--accent-red);
            color: #FFFFFF;
            border: 1px solid var(--accent-red);
            cursor: pointer;
            box-shadow: 0 4px 14px rgba(211, 47, 47, 0.35);
            transition: var(--transition);
        }

        .btn-signup:hover {
            background: #B71C1C;
            border-color: #B71C1C;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(211, 47, 47, 0.45);
        }

        /* Article Hero */
        .article-hero {
            padding: 52px 0 36px;
            background: linear-gradient(145deg, #0A2E1C 0%, #123E25 55%, #0F3522 100%);
            border-bottom: 1px solid rgba(255, 215, 0, 0.14);
            position: relative;
            overflow: hidden;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            pointer-events: none;
        }

        .article-hero-inner {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            margin-bottom: 22px;
            font-size: 0.88rem;
            color: var(--text-muted);
        }

        .breadcrumb a {
            color: var(--accent-gold);
            font-weight: 600;
        }

        .breadcrumb a:hover {
            text-decoration: underline;
        }

        .breadcrumb .sep {
            color: rgba(255, 215, 0, 0.5);
        }

        .article-category-tag {
            display: inline-block;
            padding: 7px 18px;
            background: rgba(255, 215, 0, 0.14);
            color: var(--accent-gold);
            border: 1px solid rgba(255, 215, 0, 0.35);
            border-radius: 999px;
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 18px;
        }

        .article-hero h1 {
            font-size: 2.35rem;
            font-weight: 800;
            line-height: 1.28;
            color: var(--text-white);
            letter-spacing: -0.01em;
            max-width: 900px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 22px;
            font-size: 0.9rem;
            color: var(--text-muted);
            align-items: center;
        }

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

        .article-meta .dot {
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--accent-gold);
            display: inline-block;
        }

        /* Article Content */
        .article-main {
            padding: 48px 0 68px;
            flex: 1;
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 320px;
            gap: 44px;
            align-items: start;
        }

        .article-content {
            background: rgba(15, 53, 34, 0.55);
            border: 1px solid rgba(255, 215, 0, 0.16);
            border-radius: var(--radius-lg);
            padding: 38px 40px;
            box-shadow: var(--shadow-soft);
            min-width: 0;
        }

        .article-content h2 {
            font-size: 1.72rem;
            font-weight: 800;
            color: var(--accent-gold);
            margin: 32px 0 16px;
            line-height: 1.3;
        }

        .article-content h3 {
            font-size: 1.34rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 26px 0 12px;
            line-height: 1.35;
        }

        .article-content p {
            margin-bottom: 18px;
            color: var(--text-pale);
            line-height: 1.68;
            font-size: 1.02rem;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 22px 22px;
            color: var(--text-pale);
            line-height: 1.7;
        }

        .article-content li {
            margin-bottom: 8px;
            padding-left: 4px;
        }

        .article-content strong {
            color: var(--accent-gold);
            font-weight: 700;
        }

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

        .article-content a:hover {
            color: #FFE44D;
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            box-shadow: var(--shadow-soft);
        }

        .article-content blockquote {
            border-left: 4px solid var(--accent-gold);
            padding: 16px 22px;
            margin: 24px 0;
            background: rgba(255, 215, 0, 0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-pale);
        }

        .article-not-found {
            text-align: center;
            padding: 60px 20px;
            background: rgba(15, 53, 34, 0.55);
            border: 1px solid rgba(255, 215, 0, 0.16);
            border-radius: var(--radius-lg);
        }

        .article-not-found h2 {
            color: var(--accent-gold);
            font-size: 1.8rem;
            margin-bottom: 16px;
        }

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

        .article-not-found a {
            display: inline-block;
            padding: 12px 28px;
            background: var(--accent-gold);
            color: #1A2E1C;
            font-weight: 700;
            border-radius: 999px;
            transition: var(--transition);
        }

        .article-not-found a:hover {
            background: #FFE44D;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 215, 0, 0.35);
        }

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

        .sidebar-card {
            background: rgba(15, 53, 34, 0.55);
            border: 1px solid rgba(255, 215, 0, 0.16);
            border-radius: var(--radius-md);
            padding: 26px 24px;
            box-shadow: var(--shadow-soft);
        }

        .sidebar-card h3 {
            font-size: 1.15rem;
            font-weight: 800;
            color: var(--accent-gold);
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

        .sidebar-promo {
            background: linear-gradient(150deg, #123E25, #0F3522);
            border: 1px solid rgba(255, 215, 0, 0.4);
            text-align: center;
        }

        .sidebar-promo .promo-icon {
            font-size: 2.6rem;
            margin-bottom: 12px;
        }

        .sidebar-promo h4 {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 8px;
        }

        .sidebar-promo p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 18px;
        }

        .sidebar-promo .btn-cta {
            display: block;
            width: 100%;
            padding: 13px 20px;
            background: var(--accent-red);
            color: #FFFFFF;
            border: none;
            border-radius: 999px;
            font-weight: 800;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
        }

        .sidebar-promo .btn-cta:hover {
            background: #B71C1C;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(211, 47, 47, 0.4);
        }

        .sidebar-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .sidebar-links a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.92rem;
            color: var(--text-pale);
            transition: var(--transition);
        }

        .sidebar-links a:hover {
            background: rgba(255, 215, 0, 0.08);
            color: var(--accent-gold);
        }

        .sidebar-links a .arrow {
            color: var(--accent-gold);
            font-size: 0.8rem;
        }

        /* Trust badges in sidebar */
        .trust-strip {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .trust-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 215, 0, 0.2);
            border-radius: 999px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--text-muted);
        }

        /* Floating Action Button */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 90;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(145deg, #1A0A0A, #0D0D0D);
            border: 2px solid var(--accent-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            opacity: 0.7;
            transition: var(--transition);
            animation: fabFloat 3.2s ease-in-out infinite;
            font-size: 1.6rem;
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 26px rgba(255, 215, 0, 0.55);
        }

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

        .fab::after {
            content: '';
            position: absolute;
            top: -3px;
            right: -3px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: #D32F2F;
            border: 2px solid #FFD700;
            animation: fabBlink 1.6s ease-in-out infinite;
        }

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

        @keyframes fabBlink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.35; }
        }

        /* CTA Section */
        .article-cta-section {
            padding: 56px 0 72px;
            background: linear-gradient(150deg, #0A2E1C 0%, #123E25 70%, #0F3522 100%);
            border-top: 1px solid rgba(255, 215, 0, 0.14);
        }

        .cta-panel {
            background: linear-gradient(140deg, #0F3522, #1A4A30);
            border: 1px solid rgba(255, 215, 0, 0.35);
            border-radius: var(--radius-lg);
            padding: 44px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-soft);
        }

        .cta-panel-text h2 {
            font-size: 1.7rem;
            font-weight: 800;
            color: var(--accent-gold);
            margin-bottom: 10px;
            line-height: 1.3;
        }

        .cta-panel-text p {
            color: var(--text-muted);
            font-size: 1rem;
            max-width: 520px;
        }

        .cta-panel .btn-cta-large {
            padding: 16px 36px;
            background: var(--accent-red);
            color: #FFFFFF;
            border: none;
            border-radius: 999px;
            font-weight: 800;
            font-size: 1.05rem;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 6px 20px rgba(211, 47, 47, 0.35);
            white-space: nowrap;
        }

        .cta-panel .btn-cta-large:hover {
            background: #B71C1C;
            transform: translateY(-3px);
            box-shadow: 0 12px 28px rgba(211, 47, 47, 0.5);
        }

        /* Footer */
        .site-footer {
            background: #071F13;
            border-top: 1px solid rgba(255, 215, 0, 0.2);
            padding: 54px 0 28px;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand h4 {
            color: var(--accent-gold);
            font-size: 1.15rem;
            font-weight: 800;
            margin-bottom: 14px;
            line-height: 1.4;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.65;
        }

        .footer-col h5 {
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }

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

        .footer-col ul a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            flex-wrap: wrap;
        }

        .footer-bottom p {
            color: var(--text-muted);
            font-size: 0.82rem;
        }

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

        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 7px 14px;
            background: rgba(255, 215, 0, 0.08);
            border: 1px solid rgba(255, 215, 0, 0.25);
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent-gold);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .article-sidebar {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
            }
            .sidebar-card {
                flex: 1 1 280px;
            }
            .header-inner {
                flex-direction: column;
                align-items: flex-start;
            }
            .nav-links {
                width: 100%;
            }
            .logo {
                max-width: 100%;
            }
        }

        @media (max-width: 768px) {
            .article-hero h1 {
                font-size: 1.8rem;
            }
            .article-content {
                padding: 26px 20px;
            }
            .article-main {
                padding: 32px 0 48px;
            }
            .cta-panel {
                padding: 30px 24px;
                flex-direction: column;
                text-align: center;
            }
            .cta-panel .btn-cta-large {
                width: 100%;
                text-align: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .nav-auth {
                width: 100%;
                justify-content: flex-end;
            }
            .nav-links li a {
                font-size: 0.84rem;
                padding: 8px 13px;
            }
        }

        @media (max-width: 520px) {
            .article-hero {
                padding: 34px 0 24px;
            }
            .article-hero h1 {
                font-size: 1.5rem;
            }
            .article-content {
                padding: 20px 16px;
                border-radius: var(--radius-md);
            }
            .article-content h2 {
                font-size: 1.4rem;
            }
            .article-content h3 {
                font-size: 1.16rem;
            }
            .article-meta {
                gap: 12px;
                font-size: 0.8rem;
            }
            .logo {
                font-size: 1.05rem;
            }
            .btn-login, .btn-signup {
                padding: 8px 14px;
                font-size: 0.82rem;
            }
            .fab {
                width: 48px;
                height: 48px;
                left: 12px;
                bottom: 80px;
                font-size: 1.3rem;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0F0C20;
            --bg-secondary: #0B1A30;
            --bg-card: #151030;
            --bg-card-hover: #1C1540;
            --accent-lime: #CCFF00;
            --accent-cyan: #00F0FF;
            --accent-hotpink: #FF007F;
            --accent-gold: #FFD700;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --text-muted: #6B7280;
            --border-color: rgba(0, 240, 255, 0.15);
            --border-hover: rgba(0, 240, 255, 0.45);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.15);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 1.5rem;
            --spacing-lg: 2.5rem;
            --spacing-xl: 4rem;
            --spacing-xxl: 6rem;
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.5s ease;
        }
        
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        
        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            font-size: 16px;
            overflow-x: hidden;
            min-height: 100vh;
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
            color: inherit;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            width: 100%;
        }
        
        /* ===== HEADER / NAV ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.12);
            transition: all var(--transition-base);
        }
        
        .site-header.scrolled {
            background: rgba(15, 12, 32, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }
        
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.75rem 0;
            gap: var(--spacing-md);
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-shrink: 0;
            max-width: 420px;
        }
        
        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-hotpink));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            font-weight: 900;
            color: #0F0C20;
            flex-shrink: 0;
            box-shadow: var(--shadow-neon);
        }
        
        .logo-text {
            font-size: 0.95rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }
        
        .logo-text span {
            color: var(--accent-cyan);
        }
        
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
            flex-wrap: wrap;
        }
        
        .nav-links a {
            display: block;
            padding: 0.5rem 1rem;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        
        .nav-links a:hover {
            color: var(--text-primary);
            background: rgba(0, 240, 255, 0.08);
        }
        
        .nav-links a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.1);
            font-weight: 600;
        }
        
        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-shrink: 0;
        }
        
        .btn-login {
            padding: 0.5rem 1.25rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        
        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.05);
        }
        
        .btn-signup {
            padding: 0.5rem 1.5rem;
            font-size: 0.85rem;
            font-weight: 700;
            color: #0F0C20;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 4px 15px rgba(204, 255, 0, 0.3);
        }
        
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 240, 255, 0.45);
        }
        
        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            padding: 0.5rem;
            background: rgba(0, 240, 255, 0.08);
            border-radius: var(--radius-sm);
        }
        
        /* ===== HERO ===== */
        .hero {
            position: relative;
            padding: 7rem 0 4rem;
            background: radial-gradient(ellipse at 20% 50%, rgba(0, 240, 255, 0.08) 0%, transparent 60%),
                        radial-gradient(ellipse at 80% 20%, rgba(255, 0, 127, 0.06) 0%, transparent 50%),
                        var(--bg-primary);
            overflow: hidden;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: 
                linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
            background-size: 60px 60px;
            pointer-events: none;
        }
        
        .hero-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }
        
        .hero-content {
            text-align: left;
        }
        
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 1rem;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-cyan);
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.02em;
        }
        
        .hero-badge i {
            font-size: 0.9rem;
        }
        
        .hero h1 {
            font-size: 2.75rem;
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-md);
            color: var(--text-primary);
        }
        
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .hero-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: var(--spacing-lg);
            max-width: 500px;
        }
        
        .hero-stats {
            display: flex;
            gap: var(--spacing-lg);
            flex-wrap: wrap;
            margin-bottom: var(--spacing-lg);
        }
        
        .hero-stat {
            display: flex;
            flex-direction: column;
        }
        
        .hero-stat-value {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.2;
        }
        
        .hero-stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        
        .hero-buttons {
            display: flex;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }
        
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.875rem 2rem;
            font-size: 0.95rem;
            font-weight: 700;
            color: #0F0C20;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            box-shadow: 0 8px 30px rgba(204, 255, 0, 0.25);
            border: none;
        }
        
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 240, 255, 0.4);
        }
        
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.875rem 2rem;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
        }
        
        .btn-secondary:hover {
            border-color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
            transform: translateY(-3px);
        }
        
        .hero-visual {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .hero-visual-box {
            position: relative;
            width: 100%;
            max-width: 480px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: var(--spacing-md);
            box-shadow: var(--shadow-card), var(--shadow-glow);
        }
        
        .hero-visual-box img {
            border-radius: var(--radius-md);
            width: 100%;
            object-fit: cover;
            aspect-ratio: 16/10;
        }
        
        .hero-visual-overlay {
            position: absolute;
            bottom: -1rem;
            right: -1rem;
            background: linear-gradient(135deg, var(--accent-hotpink), var(--accent-cyan));
            padding: 0.75rem 1.25rem;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 0.9rem;
            color: #0F0C20;
            box-shadow: var(--shadow-neon);
        }
        
        /* ===== MAIN CONTENT ===== */
        main {
            position: relative;
        }
        
        .section {
            padding: var(--spacing-xxl) 0;
        }
        
        .section-alt {
            background: var(--bg-secondary);
        }
        
        .section-header {
            margin-bottom: var(--spacing-lg);
            text-align: left;
        }
        
        .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.01em;
            margin-bottom: var(--spacing-sm);
            color: var(--text-primary);
        }
        
        .section-header p {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 650px;
            line-height: 1.7;
        }
        
        /* ===== FEATURE GRID ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }
        
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-lime));
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        
        .feature-card:hover {
            border-color: var(--border-hover);
            background: var(--bg-card-hover);
            transform: translateY(-5px);
            box-shadow: var(--shadow-glow);
        }
        
        .feature-card:hover::before {
            opacity: 1;
        }
        
        .feature-icon {
            width: 48px;
            height: 48px;
            background: rgba(0, 240, 255, 0.1);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: var(--accent-cyan);
            margin-bottom: var(--spacing-sm);
        }
        
        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: var(--spacing-xs);
            color: var(--text-primary);
        }
        
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }
        
        /* ===== STEP FLOW ===== */
        .step-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
            counter-reset: step;
        }
        
        .step-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            position: relative;
            counter-increment: step;
            transition: all var(--transition-base);
        }
        
        .step-item:hover {
            border-color: var(--border-hover);
            background: var(--bg-card-hover);
            transform: translateY(-3px);
        }
        
        .step-number {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--accent-cyan);
            line-height: 1;
            margin-bottom: var(--spacing-sm);
            opacity: 0.6;
        }
        
        .step-item h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: var(--spacing-xs);
            color: var(--text-primary);
        }
        
        .step-item p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        
        /* ===== COMPARISON TABLE ===== */
        .comparison-table-wrapper {
            overflow-x: auto;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            background: var(--bg-card);
        }
        
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 650px;
        }
        
        .comparison-table th {
            background: rgba(0, 240, 255, 0.08);
            padding: 1rem 1.25rem;
            text-align: left;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--accent-cyan);
            border-bottom: 1px solid var(--border-color);
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }
        
        .comparison-table td {
            padding: 1rem 1.25rem;
            font-size: 0.9rem;
            color: var(--text-secondary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        
        .comparison-table tr:last-child td {
            border-bottom: none;
        }
        
        .comparison-table tr:hover td {
            background: rgba(0, 240, 255, 0.03);
        }
        
        .badge-success {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            padding: 0.25rem 0.75rem;
            background: rgba(204, 255, 0, 0.1);
            color: var(--accent-lime);
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        
        .badge-warning {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            padding: 0.25rem 0.75rem;
            background: rgba(255, 159, 0, 0.1);
            color: #FF9F00;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        
        /* ===== PROMO BANNER ===== */
        .promo-banner {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(255, 0, 127, 0.08));
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }
        
        .promo-banner-content {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }
        
        .promo-banner-icon {
            width: 56px;
            height: 56px;
            background: rgba(0, 240, 255, 0.15);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            flex-shrink: 0;
        }
        
        .promo-banner-text h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.25rem;
        }
        
        .promo-banner-text p {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        
        /* ===== FAQ ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
        }
        
        .faq-item:hover {
            border-color: var(--border-hover);
        }
        
        .faq-question {
            padding: 1.25rem var(--spacing-lg);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-primary);
            transition: color var(--transition-fast);
            user-select: none;
        }
        
        .faq-question:hover {
            color: var(--accent-cyan);
        }
        
        .faq-question i {
            transition: transform var(--transition-base);
            color: var(--accent-cyan);
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
            padding: 0 var(--spacing-lg);
        }
        
        .faq-item.active .faq-answer {
            max-height: 500px;
            padding-bottom: var(--spacing-lg);
        }
        
        .faq-answer p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        
        /* ===== CTA SECTION ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.1), rgba(204, 255, 0, 0.05));
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(ellipse at center, rgba(0, 240, 255, 0.05) 0%, transparent 70%);
            pointer-events: none;
        }
        
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: var(--spacing-sm);
            color: var(--text-primary);
            position: relative;
            z-index: 1;
        }
        
        .cta-section p {
            font-size: 1rem;
            color: var(--text-secondary);
            margin-bottom: var(--spacing-lg);
            position: relative;
            z-index: 1;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .cta-buttons {
            display: flex;
            gap: var(--spacing-sm);
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        
        /* ===== FOOTER ===== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            margin-top: var(--spacing-xxl);
        }
        
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: var(--spacing-xl);
            margin-bottom: var(--spacing-lg);
        }
        
        .footer-brand h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: var(--spacing-sm);
            line-height: 1.4;
        }
        
        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        
        .footer-col h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: var(--spacing-sm);
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }
        
        .footer-col ul {
            list-style: none;
        }
        
        .footer-col ul li {
            margin-bottom: 0.5rem;
        }
        
        .footer-col ul a {
            font-size: 0.85rem;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }
        
        .footer-col ul a:hover {
            color: var(--accent-cyan);
        }
        
        .footer-bottom {
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }
        
        .footer-bottom p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        
        .footer-badges {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
        
        .footer-badge {
            padding: 0.35rem 0.85rem;
            background: rgba(0, 240, 255, 0.06);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: 50px;
            font-size: 0.75rem;
            color: var(--text-secondary);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
        }
        
        /* ===== FAB ===== */
        .fab {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 950;
            width: 56px;
            height: 56px;
            background: rgba(0, 0, 0, 0.65);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 2px solid transparent;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            box-shadow: var(--shadow-neon);
            opacity: 0.65;
            transition: all var(--transition-base);
            position: fixed;
            animation: fabFloat 3s ease-in-out infinite;
        }
        
        .fab::before {
            content: '';
            position: absolute;
            inset: -3px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-hotpink));
            z-index: -1;
            opacity: 0.8;
        }
        
        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
        }
        
        .fab:active {
            transform: scale(0.95);
        }
        
        .fab .notification-dot {
            position: absolute;
            top: 2px;
            right: 2px;
            width: 12px;
            height: 12px;
            background: var(--accent-hotpink);
            border-radius: 50%;
            border: 2px solid #0F0C20;
            animation: pulse-dot 1.5s ease-in-out infinite;
        }
        
        @keyframes fabFloat {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }
        
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.3); }
        }
        
        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 2.25rem;
            }
            
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .step-flow {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-lg);
            }
        }
        
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
                gap: 0.5rem;
            }
            
            .logo {
                max-width: 300px;
            }
            
            .logo-text {
                font-size: 0.8rem;
            }
            
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(15, 12, 32, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: var(--spacing-md);
                border-bottom: 1px solid var(--border-color);
                gap: 0.25rem;
            }
            
            .nav-links.open {
                display: flex;
            }
            
            .nav-links a {
                padding: 0.75rem 1rem;
                font-size: 0.9rem;
                width: 100%;
            }
            
            .mobile-toggle {
                display: block;
            }
            
            .header-actions {
                margin-left: auto;
            }
            
            .hero {
                padding: 5rem 0 3rem;
            }
            
            .hero-inner {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            
            .hero h1 {
                font-size: 1.75rem;
            }
            
            .hero-subtitle {
                font-size: 0.95rem;
            }
            
            .hero-visual-box {
                max-width: 100%;
            }
            
            .section {
                padding: var(--spacing-xl) 0;
            }
            
            .section-header h2 {
                font-size: 1.5rem;
            }
            
            .feature-grid {
                grid-template-columns: 1fr;
            }
            
            .step-flow {
                grid-template-columns: 1fr;
            }
            
            .promo-banner {
                flex-direction: column;
                align-items: flex-start;
            }
            
            .cta-section {
                padding: var(--spacing-lg);
            }
            
            .cta-section h2 {
                font-size: 1.5rem;
            }
            
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: var(--spacing-sm);
            }
            
            .fab {
                width: 48px;
                height: 48px;
                font-size: 1.25rem;
                left: 0.75rem;
                bottom: 5rem;
            }
        }
        
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.5rem;
            }
            
            .hero-stats {
                gap: var(--spacing-sm);
            }
            
            .hero-stat-value {
                font-size: 1.35rem;
            }
            
            .hero-buttons {
                flex-direction: column;
                width: 100%;
            }
            
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            
            .btn-login,
            .btn-signup {
                padding: 0.4rem 0.85rem;
                font-size: 0.8rem;
            }
            
            .logo-text {
                font-size: 0.7rem;
            }
            
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }
            
            .cta-section h2 {
                font-size: 1.25rem;
            }
            
            .comparison-table th,
            .comparison-table td {
                padding: 0.75rem 0.85rem;
                font-size: 0.8rem;
            }
        }
        
        /* Focus states for accessibility */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }

/* roulang page: category2 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: #111827;
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-gradient: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-subtle: rgba(0, 82, 255, 0.25);
            --border-strong: rgba(0, 240, 255, 0.4);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 32px;
            --space-xs: 8px;
            --space-sm: 16px;
            --space-md: 24px;
            --space-lg: 40px;
            --space-xl: 64px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

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

        body {
            font-family: var(--font-body);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            font-size: 16px;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        button,
        .btn {
            font-family: inherit;
            cursor: pointer;
            transition: all var(--transition-smooth);
        }

        .container {
            max-width: 1200px;
            width: 100%;
            margin: 0 auto;
            padding-left: var(--space-sm);
            padding-right: var(--space-sm);
        }

        /* Header / Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
        }

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

        .brand-logo {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            line-height: 1.3;
            max-width: 380px;
        }

        .brand-logo span {
            background: var(--accent-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li a {
            display: block;
            padding: 10px 16px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(0, 82, 255, 0.1);
        }

        .nav-links li a.active {
            color: var(--accent-secondary);
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid var(--border-strong);
        }

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

        .btn-login {
            padding: 10px 20px;
            background: transparent;
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            white-space: nowrap;
        }

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

        .btn-signup {
            padding: 10px 22px;
            background: var(--accent-gradient);
            border: none;
            color: var(--text-primary);
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 0 12px rgba(0, 82, 255, 0.4);
            white-space: nowrap;
        }

        .btn-signup:hover {
            box-shadow: 0 0 22px rgba(0, 240, 255, 0.6);
            transform: translateY(-1px);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
            font-size: 1.4rem;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
        }

        /* Hero Section */
        .category-hero {
            padding: 130px 0 70px;
            background: linear-gradient(160deg, rgba(0, 82, 255, 0.12) 0%, rgba(0, 240, 255, 0.05) 50%, transparent 100%), var(--bg-primary);
            border-bottom: 1px solid var(--border-subtle);
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 70%);
            border-radius: 50%;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.06) 0%, transparent 70%);
            border-radius: 50%;
        }

        .hero-content {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: var(--space-xl);
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-text .eyebrow {
            display: inline-block;
            padding: 8px 16px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-strong);
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-secondary);
            margin-bottom: var(--space-sm);
            letter-spacing: 0.3px;
        }

        .hero-text h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: var(--space-md);
            color: var(--text-primary);
        }

        .hero-text h1 span {
            background: var(--accent-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-text .lead {
            font-size: 1.12rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: var(--space-md);
            max-width: 560px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: var(--space-sm);
        }

        .btn-primary-cta {
            padding: 14px 32px;
            background: var(--accent-gradient);
            border: none;
            color: var(--text-primary);
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 0 20px rgba(0, 82, 255, 0.45);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-primary-cta:hover {
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.7);
            transform: translateY(-2px);
        }

        .btn-outline-cta {
            padding: 14px 32px;
            background: transparent;
            border: 1px solid var(--border-strong);
            color: var(--accent-secondary);
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

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

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

        .hero-visual img {
            width: 100%;
            max-width: 480px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-subtle);
        }

        /* Group buy banner */
        .group-buy-banner {
            margin-top: var(--space-md);
            padding: 20px 24px;
            background: rgba(0, 82, 255, 0.08);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .group-avatars {
            display: flex;
            align-items: center;
        }

        .group-avatars .avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--accent-gradient);
            border: 2px solid var(--bg-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-left: -8px;
        }

        .group-avatars .avatar:first-child {
            margin-left: 0;
        }

        .group-buy-text {
            flex: 1;
            font-size: 0.92rem;
            color: var(--text-secondary);
        }

        .group-buy-text strong {
            color: var(--accent-secondary);
        }

        /* Section spacing */
        .section {
            padding: var(--space-xl) 0;
        }

        .section-header {
            margin-bottom: var(--space-lg);
        }

        .section-header .section-tag {
            display: inline-block;
            padding: 6px 14px;
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid var(--border-subtle);
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-secondary);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 650px;
            line-height: 1.7;
        }

        /* Feature grid */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-md);
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--accent-gradient);
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }

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

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

        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(0, 82, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: var(--space-sm);
            color: var(--accent-secondary);
            font-size: 1.3rem;
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .feature-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0;
        }

        /* Comparison table */
        .comparison-wrapper {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

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

        .comparison-table th,
        .comparison-table td {
            padding: 18px 24px;
            text-align: left;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .comparison-table th {
            background: rgba(0, 82, 255, 0.08);
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--accent-secondary);
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }

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

        .comparison-table td:first-child {
            font-weight: 600;
            color: var(--text-primary);
        }

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

        .comparison-table .highlight {
            color: var(--accent-secondary);
            font-weight: 600;
        }

        .badge-success {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-secondary);
        }

        /* Process steps */
        .steps-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .step-item {
            display: flex;
            gap: var(--space-md);
            padding: var(--space-sm) 0;
            position: relative;
        }

        .step-item:not(:last-child)::after {
            content: '';
            position: absolute;
            left: 23px;
            top: 52px;
            bottom: 0;
            width: 2px;
            background: rgba(0, 240, 255, 0.2);
        }

        .step-number {
            width: 46px;
            height: 46px;
            min-width: 46px;
            border-radius: 50%;
            background: var(--accent-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text-primary);
            box-shadow: 0 0 15px rgba(0, 82, 255, 0.4);
            z-index: 1;
        }

        .step-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text-primary);
        }

        .step-content p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin: 0;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

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

        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }

        .faq-question .faq-icon {
            font-size: 1.2rem;
            color: var(--accent-secondary);
            transition: transform var(--transition-fast);
            min-width: 24px;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }

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

        /* CTA Section */
        .cta-section {
            padding: var(--space-xl) 0;
            background: linear-gradient(160deg, rgba(0, 82, 255, 0.15) 0%, rgba(0, 240, 255, 0.06) 100%);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .cta-box {
            background: var(--bg-card);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: center;
            box-shadow: var(--shadow-card);
        }

        .cta-box h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .cta-box p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 550px;
            margin: 0 auto var(--space-md);
            line-height: 1.7;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: var(--space-xl) 0 var(--space-sm);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 0.8fr;
            gap: var(--space-xl);
            margin-bottom: var(--space-lg);
        }

        .footer-brand h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--accent-secondary);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

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

        .footer-col ul li a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }

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

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

        .footer-bottom p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
        }

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

        .footer-badge {
            padding: 6px 14px;
            background: rgba(0, 240, 255, 0.06);
            border: 1px solid var(--border-subtle);
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 950;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(8, 9, 15, 0.85), rgba(8, 9, 15, 0.85)), linear-gradient(135deg, #00F0FF, #0052FF);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-secondary);
            font-size: 1.3rem;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            cursor: pointer;
            transition: all var(--transition-smooth);
            opacity: 0.6;
            animation: fabPulse 3s ease-in-out infinite;
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.8);
        }

        .fab:active {
            transform: scale(0.95);
            border-color: #FF007F;
            color: #FF007F;
        }

        @keyframes fabPulse {
            0%, 100% {
                opacity: 0.6;
            }
            50% {
                opacity: 1;
            }
        }

        .fab-notification {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 14px;
            height: 14px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: blink 1.5s ease-in-out infinite;
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-content {
                grid-template-columns: 1fr;
                gap: var(--space-lg);
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .site-header .container {
                height: 64px;
            }
            .brand-logo {
                font-size: 0.95rem;
                max-width: 220px;
            }
            .nav-links {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.98);
                flex-direction: column;
                padding: var(--space-sm);
                gap: 4px;
                display: none;
                border-bottom: 1px solid var(--border-subtle);
                z-index: 999;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li a {
                width: 100%;
                padding: 12px 16px;
            }
            .menu-toggle {
                display: flex;
            }
            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                padding: 8px 14px;
                font-size: 0.8rem;
            }
            .category-hero {
                padding: 110px 0 50px;
            }
            .hero-text h1 {
                font-size: 2rem;
            }
            .hero-text .lead {
                font-size: 1rem;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .section {
                padding: var(--space-lg) 0;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .comparison-table th,
            .comparison-table td {
                padding: 12px 16px;
                font-size: 0.85rem;
            }
            .cta-box {
                padding: 32px 20px;
            }
            .cta-box h2 {
                font-size: 1.4rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--space-md);
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .group-buy-banner {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .brand-logo {
                font-size: 0.85rem;
                max-width: 180px;
            }
            .nav-actions .btn-login {
                display: none;
            }
            .hero-text h1 {
                font-size: 1.6rem;
            }
            .hero-text .lead {
                font-size: 0.92rem;
            }
            .section-header h2 {
                font-size: 1.35rem;
            }
            .feature-card {
                padding: 20px;
            }
            .step-number {
                width: 38px;
                height: 38px;
                min-width: 38px;
                font-size: 0.95rem;
            }
            .step-item:not(:last-child)::after {
                left: 18px;
                top: 44px;
            }
            .comparison-table th,
            .comparison-table td {
                padding: 10px 12px;
                font-size: 0.78rem;
            }
            .fab {
                width: 48px;
                height: 48px;
                font-size: 1.1rem;
                bottom: 80px;
                left: 12px;
            }
        }