/* roulang page: index */
:root {
            --bg-primary: #0A2E1C;
            --bg-secondary: #123E25;
            --bg-card: rgba(18, 62, 37, 0.85);
            --bg-dark: #062315;
            --accent-gold: #FFD700;
            --accent-red: #D32F2F;
            --accent-amber: #FF9F00;
            --text-white: #FFFFFF;
            --text-mint: #D1F2EB;
            --text-muted: #A8C5B8;
            --border-gold: rgba(255, 215, 0, 0.4);
            --border-subtle: rgba(255, 215, 0, 0.15);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.3);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-main: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --spacing-section: 80px;
            --spacing-md: 32px;
            --spacing-sm: 16px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-main);
            background-color: var(--bg-primary);
            color: var(--text-white);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--accent-gold);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: #FFE566;
            text-decoration: none;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        button {
            cursor: pointer;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: var(--spacing-section) 0;
            position: relative;
        }
        .section-header {
            margin-bottom: 48px;
            text-align: left;
        }
        .section-tag {
            display: inline-block;
            background: var(--accent-gold);
            color: var(--bg-dark);
            font-size: 0.75rem;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 50px;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }
        .section-title {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            line-height: 1.25;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 700px;
            line-height: 1.65;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            transition: var(--transition);
            text-align: center;
            white-space: nowrap;
            letter-spacing: 0.5px;
        }
        .btn-gold {
            background: linear-gradient(135deg, #FFD700, #FF9F00);
            color: #1A1A1A;
            box-shadow: var(--shadow-gold);
        }
        .btn-gold:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(255, 215, 0, 0.5);
            color: #1A1A1A;
        }
        .btn-outline-gold {
            background: transparent;
            border: 2px solid var(--accent-gold);
            color: var(--accent-gold);
        }
        .btn-outline-gold:hover {
            background: var(--accent-gold);
            color: #1A1A1A;
            transform: translateY(-3px);
        }
        .btn-red {
            background: linear-gradient(135deg, #D32F2F, #B71C1C);
            color: #FFFFFF;
            box-shadow: 0 4px 20px rgba(211, 47, 47, 0.4);
        }
        .btn-red:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(211, 47, 47, 0.6);
            color: #FFFFFF;
        }
        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 46, 28, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .nav-logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, #FFD700, #FF9F00);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 800;
            color: #1A1A1A;
        }
        .nav-logo-text {
            font-size: 1.15rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
            letter-spacing: 0.3px;
        }
        .nav-logo-text span {
            color: var(--accent-gold);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            flex: 1;
            justify-content: center;
        }
        .nav-menu li {
            position: relative;
        }
        .nav-link {
            display: block;
            padding: 10px 18px;
            color: var(--text-mint);
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: 50px;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--accent-gold);
            background: rgba(255, 215, 0, 0.1);
        }
        .nav-auth {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-login {
            padding: 8px 20px;
            color: var(--text-mint);
            font-weight: 600;
            font-size: 0.9rem;
            border-radius: 50px;
            transition: var(--transition);
            background: transparent;
            border: none;
        }
        .nav-login:hover {
            color: var(--accent-gold);
        }
        .nav-signup {
            padding: 10px 24px;
            background: linear-gradient(135deg, #FFD700, #FF9F00);
            color: #1A1A1A;
            font-weight: 700;
            font-size: 0.9rem;
            border-radius: 50px;
            transition: var(--transition);
            box-shadow: var(--shadow-gold);
            white-space: nowrap;
        }
        .nav-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(255, 215, 0, 0.5);
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-white);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 8px;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            color: var(--accent-gold);
        }
        /* Hero - Crowdfunding style */
        .hero {
            position: relative;
            min-height: 600px;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: center;
            padding: 80px 0;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 46, 28, 0.92) 0%, rgba(6, 35, 21, 0.85) 50%, rgba(10, 46, 28, 0.95) 100%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .hero-content {
            text-align: left;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 215, 0, 0.15);
            border: 1px solid var(--border-gold);
            color: var(--accent-gold);
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }
        .hero-badge .dot {
            width: 8px;
            height: 8px;
            background: var(--accent-red);
            border-radius: 50%;
            animation: blink 1.5s infinite;
        }
        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 900;
            line-height: 1.15;
            margin-bottom: 20px;
            color: var(--text-white);
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, #FFD700, #FF9F00);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-mint);
            margin-bottom: 32px;
            max-width: 520px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }
        .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: left;
        }
        .hero-stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-gold);
            line-height: 1.2;
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .hero-visual {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .progress-ring-container {
            position: relative;
            width: 320px;
            height: 320px;
            background: rgba(18, 62, 37, 0.9);
            border-radius: 50%;
            border: 3px solid var(--border-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-card);
        }
        .progress-ring-inner {
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(6, 35, 21, 0.95);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 24px;
            border: 2px solid rgba(255, 215, 0, 0.2);
        }
        .progress-percent {
            font-size: 3rem;
            font-weight: 900;
            color: var(--accent-gold);
            line-height: 1;
            margin-bottom: 8px;
        }
        .progress-label {
            font-size: 0.9rem;
            color: var(--text-mint);
            font-weight: 600;
        }
        /* Section 2: Target Progress */
        .progress-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .progress-bar-wrap {
            background: rgba(6, 35, 21, 0.8);
            border-radius: 50px;
            padding: 32px;
            border: 1px solid var(--border-subtle);
        }
        .progress-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 20px;
        }
        .progress-title {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-white);
        }
        .progress-amount {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--accent-gold);
        }
        .progress-track {
            width: 100%;
            height: 16px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50px;
            overflow: hidden;
            margin-bottom: 20px;
        }
        .progress-fill {
            height: 100%;
            background: linear-gradient(135deg, #FFD700, #FF9F00);
            border-radius: 50px;
            width: 72%;
            transition: width 1s ease;
        }
        .progress-details {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .progress-details span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .progress-details .icon {
            color: var(--accent-gold);
        }
        /* Section 3: Tier Rewards */
        .tier-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .tier-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 32px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .tier-card:hover {
            transform: translateY(-8px);
            border-color: var(--border-gold);
            box-shadow: var(--shadow-card);
        }
        .tier-card.featured {
            border-color: var(--accent-gold);
            background: linear-gradient(135deg, rgba(255, 215, 0, 0.08), rgba(18, 62, 37, 0.9));
        }
        .tier-tag {
            position: absolute;
            top: 16px;
            right: 16px;
            background: var(--accent-red);
            color: #FFFFFF;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 50px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .tier-icon {
            font-size: 2.5rem;
            margin-bottom: 16px;
        }
        .tier-name {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
        }
        .tier-price {
            font-size: 2rem;
            font-weight: 900;
            color: var(--accent-gold);
            margin-bottom: 16px;
        }
        .tier-desc {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            line-height: 1.6;
        }
        .tier-features {
            list-style: none;
            margin-bottom: 24px;
        }
        .tier-features li {
            padding: 6px 0;
            color: var(--text-mint);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .tier-features li::before {
            content: '✓';
            color: var(--accent-gold);
            font-weight: 700;
        }
        /* Section 4: Backer Wall */
        .backer-wall {
            background: var(--bg-dark);
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid var(--border-subtle);
        }
        .backer-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .backer-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px;
            background: rgba(18, 62, 37, 0.6);
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .backer-item:hover {
            background: rgba(255, 215, 0, 0.1);
        }
        .backer-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, #FFD700, #FF9F00);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: #1A1A1A;
            flex-shrink: 0;
            font-size: 0.9rem;
        }
        .backer-info {
            flex: 1;
        }
        .backer-name {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-white);
        }
        .backer-amount {
            font-size: 0.8rem;
            color: var(--accent-gold);
        }
        .backer-time {
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        /* Section 5: News / CMS List */
        .news-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }
        .news-list {
            list-style: none;
        }
        .news-item {
            padding: 20px 0;
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition);
        }
        .news-item:first-child {
            padding-top: 0;
        }
        .news-item:hover {
            padding-left: 8px;
        }
        .news-item-link {
            display: block;
            color: var(--text-white);
            font-size: 1.05rem;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 6px;
            transition: var(--transition);
        }
        .news-item-link:hover {
            color: var(--accent-gold);
        }
        .news-item-meta {
            display: flex;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .news-sidebar {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px;
        }
        .news-sidebar-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border-subtle);
        }
        .news-sidebar-list {
            list-style: none;
        }
        .news-sidebar-list li {
            padding: 12px 0;
            border-bottom: 1px solid var(--border-subtle);
        }
        .news-sidebar-list li:last-child {
            border-bottom: none;
        }
        .news-sidebar-list a {
            color: var(--text-mint);
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .news-sidebar-list a:hover {
            color: var(--accent-gold);
        }
        /* Section 6: Timeline */
        .timeline {
            position: relative;
            padding-left: 40px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 10px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--border-gold);
        }
        .timeline-item {
            position: relative;
            padding-bottom: 40px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-dot {
            position: absolute;
            left: -38px;
            top: 5px;
            width: 20px;
            height: 20px;
            background: var(--accent-gold);
            border-radius: 50%;
            border: 4px solid var(--bg-primary);
            box-shadow: 0 0 0 2px var(--border-gold);
        }
        .timeline-date {
            font-size: 0.85rem;
            color: var(--accent-gold);
            font-weight: 600;
            margin-bottom: 6px;
        }
        .timeline-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
        }
        .timeline-desc {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        /* Section 7: FAQ */
        .faq-list {
            max-width: 800px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-gold);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            background: transparent;
            border: none;
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 600;
            text-align: left;
            cursor: pointer;
            gap: 16px;
        }
        .faq-question .faq-icon {
            color: var(--accent-gold);
            font-size: 1.2rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            padding: 0 24px;
        }
        .faq-item.open .faq-answer {
            max-height: 200px;
            padding: 0 24px 20px;
        }
        .faq-answer p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        /* Section 8: CTA */
        .cta-section {
            background: var(--bg-secondary);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            border: 1px solid var(--border-gold);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at center, rgba(255, 215, 0, 0.05), transparent 60%);
            pointer-events: none;
        }
        .cta-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .cta-desc {
            font-size: 1.05rem;
            color: var(--text-mint);
            margin-bottom: 32px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        /* Footer */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-subtle);
            padding: 60px 0 30px;
            margin-top: 80px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand {
            color: var(--text-mint);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .footer-logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-logo span {
            color: var(--accent-gold);
        }
        .footer-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-gold);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-badges {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .footer-badge {
            padding: 6px 14px;
            background: rgba(255, 215, 0, 0.1);
            border: 1px solid var(--border-gold);
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent-gold);
        }
        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            background: #0B0B0B;
            border: 2px solid var(--accent-gold);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-gold);
            box-shadow: var(--shadow-gold);
            transition: var(--transition);
            opacity: 0.7;
            animation: float 3s ease-in-out infinite;
            cursor: pointer;
        }
        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 8px 30px rgba(255, 215, 0, 0.5);
        }
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }
        .fab-notification {
            position: absolute;
            top: 2px;
            right: 2px;
            width: 12px;
            height: 12px;
            background: var(--accent-red);
            border-radius: 50%;
            border: 2px solid #0B0B0B;
            animation: blink 2s infinite;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero {
                min-height: auto;
                padding: 60px 0;
            }
            .hero-visual {
                order: -1;
            }
            .progress-ring-container {
                width: 260px;
                height: 260px;
            }
            .progress-ring-inner {
                width: 200px;
                height: 200px;
            }
            .tier-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .backer-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .section-title {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(10, 46, 28, 0.98);
                flex-direction: column;
                padding: 24px;
                gap: 8px;
                border-bottom: 1px solid var(--border-subtle);
                display: none;
                box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-link {
                padding: 14px 20px;
                font-size: 1.1rem;
            }
            .nav-auth {
                gap: 8px;
            }
            .nav-login {
                padding: 8px 14px;
                font-size: 0.85rem;
            }
            .nav-signup {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
            .nav-container {
                height: 64px;
            }
            .nav-logo-text {
                font-size: 0.95rem;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .tier-grid {
                grid-template-columns: 1fr;
            }
            .backer-list {
                grid-template-columns: 1fr;
            }
            .news-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .cta-section {
                padding: 40px 24px;
            }
            .cta-title {
                font-size: 1.7rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .progress-bar-wrap {
                padding: 20px;
            }
            .backer-wall {
                padding: 24px;
            }
            .fab {
                width: 48px;
                height: 48px;
                font-size: 1.3rem;
                left: 12px;
                bottom: 80px;
            }
        }
        @media (max-width: 520px) {
            .hero-stats {
                gap: 16px;
            }
            .hero-stat-number {
                font-size: 1.4rem;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .progress-ring-container {
                width: 220px;
                height: 220px;
            }
            .progress-ring-inner {
                width: 170px;
                height: 170px;
                padding: 16px;
            }
            .progress-percent {
                font-size: 2.2rem;
            }
            .timeline {
                padding-left: 30px;
            }
            .timeline-dot {
                left: -28px;
                width: 16px;
                height: 16px;
            }
            .timeline::before {
                left: 7px;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.85);
            --bg-card-solid: #111827;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-gold: #FFD700;
            --accent-red: #FF2D55;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #64748B;
            --border-color: rgba(0, 240, 255, 0.2);
            --border-glow: rgba(0, 240, 255, 0.5);
            --shadow-glow: 0 0 25px rgba(0, 240, 255, 0.15);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 12px 40px rgba(0, 240, 255, 0.2);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1200px;
            --header-height: 72px;
        }

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

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

        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            min-height: 100vh;
            background-image:
                radial-gradient(ellipse at 20% 10%, rgba(0, 82, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(0, 240, 255, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(0, 82, 255, 0.04) 0%, transparent 50%);
        }

        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;
            transition: all var(--transition-base);
        }

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

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

        /* Header / Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            height: var(--header-height);
            transition: background var(--transition-base), border-color var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.97);
            border-bottom-color: rgba(0, 240, 255, 0.3);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 20px;
        }

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

        .nav-logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
        }

        .nav-logo-text {
            font-size: 20px;
            font-weight: 700;
            letter-spacing: -0.5px;
            line-height: 1.2;
            color: var(--text-primary);
        }

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

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            white-space: nowrap;
            transition: color var(--transition-fast), background var(--transition-fast);
        }

        .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-link.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.1);
            font-weight: 600;
        }

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

        .nav-login {
            padding: 9px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 8px;
            white-space: nowrap;
        }

        .nav-login:hover {
            border-color: rgba(255, 255, 255, 0.5);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-signup {
            padding: 9px 20px;
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), #0038B8);
            border-radius: 8px;
            box-shadow: 0 4px 20px rgba(0, 82, 255, 0.4);
            white-space: nowrap;
        }

        .nav-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 28px rgba(0, 82, 255, 0.6);
        }

        .nav-signup:active {
            transform: translateY(0);
            box-shadow: 0 2px 10px rgba(0, 82, 255, 0.3);
        }

        .nav-toggle {
            display: none;
            font-size: 28px;
            color: var(--text-primary);
            padding: 4px 8px;
            border-radius: 8px;
            line-height: 1;
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* Article Layout */
        .article-wrapper {
            padding-top: calc(var(--header-height) + 40px);
            padding-bottom: 80px;
            min-height: calc(100vh - var(--header-height));
        }

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

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }

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

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

        .article-breadcrumb .sep {
            opacity: 0.5;
        }

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

        .article-category-badge {
            display: inline-block;
            padding: 6px 14px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: 20px;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

        .article-title {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.5px;
            color: var(--text-primary);
            margin-bottom: 18px;
            max-width: 850px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 14px;
            color: var(--text-muted);
            padding-bottom: 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

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

        .article-meta-item svg {
            width: 16px;
            height: 16px;
            opacity: 0.7;
        }

        .article-body {
            max-width: 820px;
            margin: 0 auto;
        }

        .article-content {
            font-size: 17px;
            line-height: 1.75;
            color: var(--text-secondary);
        }

        .article-content p {
            margin-bottom: 22px;
        }

        .article-content h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            margin-top: 40px;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }

        .article-content h3 {
            font-size: 22px;
            font-weight: 600;
            color: var(--text-primary);
            margin-top: 32px;
            margin-bottom: 12px;
        }

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

        .article-content ul,
        .article-content ol {
            margin: 0 0 22px 24px;
            color: var(--text-secondary);
        }

        .article-content li {
            margin-bottom: 10px;
        }

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

        .article-content a:hover {
            color: var(--accent-blue);
        }

        .article-content blockquote {
            margin: 28px 0;
            padding: 20px 24px;
            background: rgba(0, 82, 255, 0.08);
            border-left: 4px solid var(--accent-blue);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-primary);
        }

        .article-cta-box {
            margin: 40px 0;
            padding: 32px;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.15), rgba(0, 240, 255, 0.08));
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: var(--radius-lg);
            text-align: center;
        }

        .article-cta-box h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .article-cta-box p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        .article-cta-btn {
            display: inline-block;
            padding: 14px 32px;
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), #0038B8);
            border-radius: 10px;
            box-shadow: 0 6px 25px rgba(0, 82, 255, 0.5);
            transition: all var(--transition-base);
        }

        .article-cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 35px rgba(0, 82, 255, 0.7);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
            max-width: 500px;
            margin: 0 auto;
        }

        .article-not-found h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .article-not-found p {
            font-size: 17px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .article-not-found a {
            display: inline-block;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 240, 255, 0.4);
            border-radius: 8px;
            transition: all var(--transition-base);
        }

        .article-not-found a:hover {
            background: rgba(0, 240, 255, 0.1);
            border-color: var(--accent-cyan);
        }

        /* Related Section */
        .related-section {
            margin-top: 60px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .related-title {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 24px;
            letter-spacing: -0.3px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .related-card {
            display: block;
            padding: 24px;
            background: var(--bg-card);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
        }

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

        .related-card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .related-card-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 60px 0 30px;
            margin-top: 40px;
        }

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

        .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

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

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 360px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

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

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

        .footer-links a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
            color: var(--text-muted);
        }

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

        .footer-badge {
            display: inline-block;
            padding: 6px 14px;
            font-size: 12px;
            font-weight: 600;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 6px;
            letter-spacing: 0.5px;
        }

        /* FAB */
        .fab-container {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 900;
        }

        .fab-button {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 14px 20px;
            background: rgba(8, 9, 15, 0.75);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            border-radius: 50px;
            position: relative;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            opacity: 0.7;
            transition: all var(--transition-base);
            min-width: 48px;
            min-height: 48px;
        }

        .fab-button::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue), var(--accent-cyan));
            z-index: -1;
            background-size: 300% 300%;
            animation: gradient-shift 3s ease infinite;
        }

        .fab-button:hover {
            opacity: 1;
            transform: scale(1.08);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.7);
        }

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

        .fab-icon {
            font-size: 22px;
            line-height: 1;
        }

        .fab-text {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .fab-dot {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 12px;
            height: 12px;
            background: var(--accent-red);
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: pulse-dot 1.5s ease infinite;
        }

        @keyframes gradient-shift {
            0%, 100% {
                background-position: 0% 50%;
            }
            50% {
                background-position: 100% 50%;
            }
        }

        @keyframes pulse-dot {
            0%, 100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.3);
            }
        }

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

        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid rgba(0, 240, 255, 0.15);
                transform: translateY(-150%);
                transition: transform var(--transition-base);
                z-index: 999;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
            }

            .nav-menu.open {
                transform: translateY(0);
            }

            .nav-link {
                padding: 14px 16px;
                font-size: 16px;
                border-radius: 8px;
            }

            .nav-auth {
                gap: 8px;
            }

            .nav-login,
            .nav-signup {
                padding: 8px 14px;
                font-size: 14px;
            }

            .nav-toggle {
                display: block;
            }

            .article-wrapper {
                padding-top: calc(var(--header-height) + 24px);
                padding-bottom: 50px;
            }

            .article-title {
                font-size: 26px;
            }

            .article-content {
                font-size: 16px;
                line-height: 1.7;
            }

            .article-content h2 {
                font-size: 24px;
            }

            .article-content h3 {
                font-size: 20px;
            }

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

            .fab-container {
                left: 12px;
                bottom: 80px;
            }

            .fab-text {
                display: none;
            }

            .fab-button {
                padding: 14px;
                border-radius: 50%;
            }
        }

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

            .nav-logo-text {
                font-size: 17px;
            }

            .nav-logo-icon {
                width: 36px;
                height: 36px;
                font-size: 18px;
            }

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

            .nav-auth .nav-signup {
                padding: 7px 14px;
                font-size: 13px;
            }

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

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

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

            .article-content h2 {
                font-size: 21px;
                margin-top: 30px;
            }

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

            .article-cta-box {
                padding: 24px 18px;
            }

            .article-cta-box h3 {
                font-size: 19px;
            }

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

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

            .related-card {
                padding: 18px;
            }
        }

/* roulang page: category1 */
:root {
            --primary-bg: #0A2E1C;
            --secondary-bg: #123E25;
            --deep-bg: #061B10;
            --accent-gold: #FFD700;
            --accent-red: #D32F2F;
            --text-white: #FFFFFF;
            --text-mint: #D1F2EB;
            --text-muted: #9BB8AD;
            --border-gold: rgba(255, 215, 0, 0.35);
            --border-subtle: rgba(255, 255, 255, 0.08);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 32px;
            --shadow-soft: 0 8px 28px rgba(0, 0, 0, 0.25);
            --shadow-gold: 0 0 24px rgba(255, 215, 0, 0.18);
            --shadow-red: 0 0 18px rgba(211, 47, 47, 0.25);
            --font-main: 'Be Vietnam Pro', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --spacing-sm: 12px;
            --spacing-md: 24px;
            --spacing-lg: 48px;
            --spacing-xl: 72px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-main);
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

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

        button {
            font-family: var(--font-main);
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }

        .container {
            width: min(1200px, 92%);
            margin: 0 auto;
        }

        /* ===== HEADER ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(6, 27, 16, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-gold);
            transition: box-shadow var(--transition-smooth);
        }

        .site-header.scrolled {
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.35);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            gap: var(--spacing-md);
        }

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

        .nav-logo-icon {
            font-size: 2rem;
            line-height: 1;
            filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.5));
        }

        .nav-logo-text {
            font-weight: 800;
            font-size: 1.2rem;
            letter-spacing: -0.02em;
            color: var(--text-white);
        }

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

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }

        .nav-link {
            display: block;
            padding: 10px 16px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-mint);
            border-radius: 30px;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

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

        .nav-link.active {
            color: var(--accent-gold);
            background: rgba(255, 215, 0, 0.14);
            box-shadow: inset 0 0 0 1px var(--border-gold);
        }

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

        .nav-login {
            padding: 10px 20px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-white);
            border-radius: 30px;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-login:hover {
            color: var(--accent-gold);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-signup {
            padding: 10px 24px;
            font-weight: 700;
            font-size: 0.9rem;
            color: #1a1a00;
            background: var(--accent-gold);
            border-radius: 30px;
            box-shadow: var(--shadow-gold);
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }

        .nav-signup:hover {
            background: #ffe44d;
            transform: translateY(-2px);
            box-shadow: 0 0 32px rgba(255, 215, 0, 0.35);
        }

        .nav-toggle {
            display: none;
            font-size: 1.6rem;
            color: var(--accent-gold);
            padding: 6px 10px;
            border-radius: 8px;
            border: 1px solid var(--border-gold);
        }

        /* ===== HERO ===== */
        .category-hero {
            position: relative;
            padding: 150px 0 90px;
            background: linear-gradient(160deg, #061B10 0%, #0A2E1C 40%, #123E25 100%);
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            opacity: 0.18;
            z-index: 0;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 30%, rgba(255, 215, 0, 0.12) 0%, transparent 55%),
                radial-gradient(ellipse at 30% 70%, rgba(211, 47, 47, 0.08) 0%, transparent 50%);
            z-index: 1;
        }

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

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

        .hero-badge-row {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 22px;
            flex-wrap: wrap;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            background: rgba(255, 215, 0, 0.12);
            border: 1px solid var(--border-gold);
            border-radius: 30px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--accent-gold);
        }

        .hero-badge-red {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            background: rgba(211, 47, 47, 0.15);
            border: 1px solid rgba(211, 47, 47, 0.4);
            border-radius: 30px;
            font-size: 0.82rem;
            font-weight: 700;
            color: #ff8a80;
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
            color: var(--text-white);
        }

        .hero-title .highlight {
            color: var(--accent-gold);
            position: relative;
        }

        .hero-title .highlight::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 0;
            right: 0;
            height: 6px;
            background: rgba(255, 215, 0, 0.3);
            border-radius: 4px;
            z-index: -1;
        }

        .hero-subtitle {
            font-size: 1.1rem;
            line-height: 1.7;
            color: var(--text-mint);
            margin-bottom: 32px;
            max-width: 520px;
        }

        .hero-cta-row {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 15px 32px;
            background: var(--accent-gold);
            color: #1a1a00;
            font-weight: 800;
            font-size: 1rem;
            border-radius: 40px;
            box-shadow: var(--shadow-gold);
            transition: all var(--transition-smooth);
        }

        .btn-primary:hover {
            background: #ffe44d;
            transform: translateY(-3px);
            box-shadow: 0 0 42px rgba(255, 215, 0, 0.4);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 15px 28px;
            background: transparent;
            color: var(--text-white);
            font-weight: 700;
            font-size: 1rem;
            border-radius: 40px;
            border: 1.5px solid rgba(255, 255, 255, 0.25);
            transition: all var(--transition-smooth);
        }

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

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

        .hero-visual-card {
            position: relative;
            width: 100%;
            max-width: 430px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 26px;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            box-shadow: var(--shadow-soft);
        }

        .hero-visual-card img {
            border-radius: var(--radius-md);
            width: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        .hero-stats-row {
            display: flex;
            gap: 14px;
            margin-top: 18px;
        }

        .hero-stat {
            flex: 1;
            text-align: center;
            padding: 14px 10px;
            background: rgba(0, 0, 0, 0.3);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-subtle);
        }

        .hero-stat-number {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-gold);
            display: block;
            line-height: 1.2;
        }

        .hero-stat-label {
            font-size: 0.75rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ===== SECTION BASE ===== */
        .section {
            padding: var(--spacing-xl) 0;
        }

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

        .section-header {
            margin-bottom: 48px;
            max-width: 640px;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-gold);
            margin-bottom: 14px;
        }

        .section-title {
            font-size: 2.1rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-mint);
        }

        /* ===== STEPS ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }

        .step-card {
            position: relative;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px 22px;
            transition: all var(--transition-smooth);
        }

        .step-card:hover {
            border-color: var(--border-gold);
            background: rgba(255, 215, 0, 0.04);
            transform: translateY(-4px);
            box-shadow: var(--shadow-gold);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            background: var(--accent-gold);
            color: #1a1a00;
            font-weight: 800;
            font-size: 1.3rem;
            border-radius: 50%;
            margin-bottom: 16px;
            box-shadow: var(--shadow-gold);
        }

        .step-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-white);
        }

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

        /* ===== CODE PANEL ===== */
        .code-panel {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 40px;
            align-items: center;
            background: linear-gradient(135deg, #061B10, #0A2E1C);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-lg);
            padding: 44px;
            box-shadow: var(--shadow-soft);
        }

        .code-panel-left h3 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 14px;
            line-height: 1.25;
        }

        .code-panel-left p {
            color: var(--text-mint);
            font-size: 1rem;
            line-height: 1.7;
            margin-bottom: 22px;
        }

        .code-input-group {
            display: flex;
            gap: 10px;
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .code-input {
            flex: 1;
            min-width: 200px;
            padding: 14px 18px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-subtle);
            border-radius: 30px;
            color: var(--text-white);
            font-family: var(--font-main);
            font-size: 0.95rem;
            transition: border-color var(--transition-fast);
        }

        .code-input:focus {
            outline: none;
            border-color: var(--accent-gold);
            box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
        }

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

        .code-panel-right img {
            border-radius: var(--radius-md);
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            border: 1px solid var(--border-subtle);
        }

        /* ===== BENEFITS LIST ===== */
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
        }

        .benefit-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 18px 20px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-sm);
            border-left: 3px solid var(--accent-gold);
            transition: background var(--transition-fast);
        }

        .benefit-item:hover {
            background: rgba(255, 215, 0, 0.05);
        }

        .benefit-icon {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 215, 0, 0.12);
            color: var(--accent-gold);
            border-radius: 50%;
            font-size: 1.1rem;
        }

        .benefit-text h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .benefit-text p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.55;
        }

        /* ===== FAQ ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            max-width: 800px;
        }

        .faq-item {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-white);
            cursor: pointer;
            width: 100%;
            text-align: left;
            transition: color var(--transition-fast);
        }

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

        .faq-icon {
            flex-shrink: 0;
            font-size: 1.2rem;
            color: var(--accent-gold);
            transition: transform var(--transition-smooth);
        }

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

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

        .faq-answer-inner {
            padding: 0 24px 22px;
            color: var(--text-mint);
            font-size: 0.92rem;
            line-height: 1.7;
        }

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

        /* ===== CTA SECTION ===== */
        .cta-section {
            background: linear-gradient(135deg, #061B10 0%, #0A2E1C 60%, #123E25 100%);
            border-top: 1px solid var(--border-gold);
            border-bottom: 1px solid var(--border-gold);
            padding: 70px 0;
            text-align: center;
        }

        .cta-section .container {
            max-width: 700px;
        }

        .cta-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .cta-desc {
            font-size: 1.05rem;
            color: var(--text-mint);
            margin-bottom: 30px;
            line-height: 1.7;
        }

        /* ===== FOOTER ===== */
        .site-footer {
            background: #061B10;
            border-top: 1px solid var(--border-gold);
            padding: 56px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 42px;
        }

        .footer-logo {
            font-weight: 800;
            font-size: 1.5rem;
            margin-bottom: 14px;
            color: var(--text-white);
        }

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

        .footer-brand p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .footer-title {
            font-size: 0.9rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--accent-gold);
            margin-bottom: 16px;
        }

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

        .footer-links a {
            font-size: 0.88rem;
            color: var(--text-mint);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 22px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.82rem;
            color: var(--text-muted);
        }

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

        .footer-badge {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            background: rgba(255, 215, 0, 0.08);
            border: 1px solid var(--border-gold);
            border-radius: 20px;
            font-size: 0.72rem;
            font-weight: 700;
            color: var(--accent-gold);
        }

        /* ===== FAB ===== */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 900;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, #0A2E1C, #061B10);
            border: 2px solid var(--accent-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-gold);
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            opacity: 0.7;
            animation: fabFloat 3s ease-in-out infinite;
            transition: all var(--transition-smooth);
            cursor: pointer;
        }

        .fab-support:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 32px rgba(255, 215, 0, 0.45);
        }

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

        .fab-notification {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 14px;
            height: 14px;
            background: var(--accent-red);
            border-radius: 50%;
            border: 2px solid #061B10;
            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: 0.4; }
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 2.4rem;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .code-panel {
                grid-template-columns: 1fr;
                padding: 32px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(6, 27, 16, 0.98);
                padding: 16px 20px;
                border-bottom: 1px solid var(--border-gold);
                gap: 4px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-link {
                width: 100%;
                padding: 12px 16px;
            }
            .nav-toggle {
                display: block;
            }
            .nav-auth {
                gap: 6px;
            }
            .nav-login {
                padding: 8px 14px;
                font-size: 0.82rem;
            }
            .nav-signup {
                padding: 8px 16px;
                font-size: 0.82rem;
            }
            .hero-title {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .cta-title {
                font-size: 1.7rem;
            }
            .benefits-grid {
                grid-template-columns: 1fr;
            }
            .hero-cta-row {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .container {
                width: 94%;
            }
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .code-panel {
                padding: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .nav-logo-text {
                font-size: 1rem;
            }
            .nav-logo-icon {
                font-size: 1.6rem;
            }
            .fab-support {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 12px;
                bottom: 80px;
            }
        }

/* roulang page: category2 */
:root {
            --color-primary: #00F0FF;
            --color-primary-dark: #00A8CC;
            --color-accent: #CCFF00;
            --color-accent-dark: #A8D600;
            --color-bg: #0F0C20;
            --color-bg-secondary: #0B1A30;
            --color-bg-card: rgba(255, 255, 255, 0.04);
            --color-bg-card-hover: rgba(255, 255, 255, 0.08);
            --color-bg-glass: rgba(15, 12, 32, 0.75);
            --color-bg-glass-light: rgba(255, 255, 255, 0.06);
            --color-text: #FFFFFF;
            --color-text-secondary: #A6ACAF;
            --color-text-muted: #6B7280;
            --color-border: rgba(255, 255, 255, 0.1);
            --color-border-active: #00F0FF;
            --color-success: #22C55E;
            --color-warning: #F59E0B;
            --color-danger: #EF4444;
            --color-gold: #FFD700;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --shadow-glow-accent: 0 0 20px rgba(204, 255, 0, 0.3);
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
        }

        *,
        *::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);
            font-size: 16px;
            line-height: 1.6;
            color: var(--color-text);
            background-color: var(--color-bg);
            background-image: 
                radial-gradient(ellipse at 20% 20%, rgba(0, 240, 255, 0.05) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 80%, rgba(204, 255, 0, 0.04) 0%, transparent 60%);
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all var(--transition-base);
        }

        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 12, 32, 0.9);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--color-border);
            transition: all var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(15, 12, 32, 0.98);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
            transition: opacity var(--transition-base);
        }

        .nav-logo:hover {
            opacity: 0.85;
        }

        .nav-logo-icon {
            width: 42px;
            height: 42px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(204, 255, 0, 0.15));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            border: 1px solid rgba(0, 240, 255, 0.3);
        }

        .nav-logo-text {
            font-size: 18px;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.2;
            white-space: nowrap;
        }

        .nav-logo-text span {
            color: var(--color-primary);
            display: block;
            font-size: 14px;
            font-weight: 600;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 10px 16px;
            border-radius: var(--radius-full);
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text-secondary);
            transition: all var(--transition-base);
            position: relative;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-link.active {
            color: var(--color-primary);
            background: rgba(0, 240, 255, 0.1);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
            box-shadow: 0 0 8px var(--color-primary);
        }

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

        .nav-login {
            padding: 10px 18px;
            border-radius: var(--radius-full);
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            background: transparent;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .nav-login:hover {
            border-color: rgba(255, 255, 255, 0.3);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-signup {
            padding: 10px 22px;
            border-radius: var(--radius-full);
            font-size: 14px;
            font-weight: 700;
            color: var(--color-bg);
            background: linear-gradient(135deg, var(--color-accent), #D9FF33);
            box-shadow: 0 4px 16px rgba(204, 255, 0, 0.3);
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .nav-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(204, 255, 0, 0.45);
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--color-border);
            color: var(--color-text);
            font-size: 20px;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-base);
            flex-shrink: 0;
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        /* Hero Banner */
        .page-hero {
            padding: 140px 0 60px;
            background: linear-gradient(180deg, rgba(0, 240, 255, 0.06) 0%, transparent 100%);
            border-bottom: 1px solid var(--color-border);
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            z-index: 0;
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
        }

        .page-hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 20px;
            font-size: 13px;
            color: var(--color-text-muted);
        }

        .page-hero-breadcrumb a {
            color: var(--color-text-secondary);
            transition: color var(--transition-base);
        }

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

        .page-hero-breadcrumb .separator {
            color: var(--color-text-muted);
        }

        .page-hero-breadcrumb .current {
            color: var(--color-primary);
            font-weight: 600;
        }

        .page-hero h1 {
            font-size: 42px;
            font-weight: 900;
            letter-spacing: -0.03em;
            line-height: 1.2;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--color-text) 30%, var(--color-primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-hero .hero-subtitle {
            font-size: 18px;
            color: var(--color-text-secondary);
            max-width: 700px;
            line-height: 1.6;
            margin-bottom: 24px;
        }

        .hero-badge-row {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 600;
            background: rgba(0, 240, 255, 0.08);
            color: var(--color-primary);
            border: 1px solid rgba(0, 240, 255, 0.2);
        }

        .hero-badge.gold {
            background: rgba(255, 215, 0, 0.08);
            color: var(--color-gold);
            border-color: rgba(255, 215, 0, 0.2);
        }

        /* Main Content */
        .main-content {
            padding: 60px 0;
        }

        .section-block {
            margin-bottom: 60px;
        }

        .section-block:last-child {
            margin-bottom: 0;
        }

        .section-header {
            margin-bottom: 32px;
        }

        .section-header h2 {
            font-size: 30px;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.3;
            margin-bottom: 8px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 600px;
        }

        .section-divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--color-border), transparent);
            margin: 60px 0;
        }

        /* Promo Cards */
        .promo-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
        }

        .promo-card {
            background: var(--color-bg-glass);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .promo-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .promo-card:hover {
            border-color: rgba(0, 240, 255, 0.3);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
            background: var(--color-bg-glass-light);
        }

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

        .promo-card.featured {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(204, 255, 0, 0.05));
            border-color: rgba(0, 240, 255, 0.3);
        }

        .promo-card .card-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            background: rgba(239, 68, 68, 0.15);
            color: #EF4444;
            border: 1px solid rgba(239, 68, 68, 0.3);
            margin-bottom: 16px;
        }

        .promo-card .card-tag.hot {
            background: rgba(245, 158, 11, 0.15);
            color: var(--color-warning);
            border-color: rgba(245, 158, 11, 0.3);
        }

        .promo-card .card-tag.new {
            background: rgba(34, 197, 94, 0.15);
            color: var(--color-success);
            border-color: rgba(34, 197, 94, 0.3);
        }

        .promo-card h3 {
            font-size: 22px;
            font-weight: 800;
            margin-bottom: 8px;
            letter-spacing: -0.02em;
        }

        .promo-card .card-value {
            font-size: 36px;
            font-weight: 900;
            color: var(--color-accent);
            letter-spacing: -0.03em;
            margin-bottom: 4px;
            text-shadow: 0 0 20px rgba(204, 255, 0, 0.3);
        }

        .promo-card .card-value-label {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 16px;
        }

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

        .promo-card .card-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--color-text-muted);
        }

        .promo-card .card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .promo-card .card-meta .dot {
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--color-success);
        }

        /* Step Process */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
            counter-reset: step-counter;
        }

        .step-item {
            position: relative;
            padding: 28px 24px;
            background: var(--color-bg-glass);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            transition: all var(--transition-base);
            counter-increment: step-counter;
        }

        .step-item::before {
            content: counter(step-counter, decimal-leading-zero);
            position: absolute;
            top: 20px;
            right: 24px;
            font-size: 48px;
            font-weight: 900;
            color: rgba(255, 255, 255, 0.06);
            line-height: 1;
        }

        .step-item:hover {
            border-color: rgba(0, 240, 255, 0.25);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .step-item .step-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            background: rgba(0, 240, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
            border: 1px solid rgba(0, 240, 255, 0.2);
        }

        .step-item h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

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

        /* Payment Methods */
        .payment-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 16px;
        }

        .payment-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px 20px;
            background: var(--color-bg-glass);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            font-weight: 600;
            font-size: 14px;
        }

        .payment-item:hover {
            border-color: rgba(0, 240, 255, 0.3);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .payment-item .payment-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: rgba(0, 240, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
        }

        .payment-item .payment-time {
            font-size: 12px;
            color: var(--color-success);
            font-weight: 500;
            margin-left: auto;
        }

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

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

        .faq-item:hover {
            border-color: rgba(0, 240, 255, 0.2);
        }

        .faq-item summary {
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 15px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            list-style: none;
            user-select: none;
            transition: all var(--transition-base);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '+';
            font-size: 22px;
            font-weight: 400;
            color: var(--color-text-muted);
            transition: all var(--transition-base);
            flex-shrink: 0;
        }

        .faq-item[open] summary::after {
            content: '−';
            color: var(--color-primary);
        }

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

        .faq-item .faq-answer {
            padding: 0 24px 18px;
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(204, 255, 0, 0.06));
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            text-align: left;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
            border-radius: 50%;
        }

        .cta-section h2 {
            font-size: 32px;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            font-size: 16px;
            color: var(--color-text-secondary);
            margin-bottom: 24px;
            max-width: 600px;
            position: relative;
            z-index: 1;
        }

        .cta-section .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            position: relative;
            z-index: 1;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-full);
            font-size: 15px;
            font-weight: 700;
            color: var(--color-bg);
            background: linear-gradient(135deg, var(--color-accent), #D9FF33);
            box-shadow: 0 4px 20px rgba(204, 255, 0, 0.35);
            transition: all var(--transition-base);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(204, 255, 0, 0.5);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-full);
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            background: transparent;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
        }

        .btn-secondary:hover {
            border-color: rgba(0, 240, 255, 0.4);
            background: rgba(0, 240, 255, 0.06);
            box-shadow: var(--shadow-glow);
        }

        /* Footer */
        .site-footer {
            background: rgba(11, 26, 48, 0.6);
            border-top: 1px solid var(--color-border);
            padding: 60px 0 24px;
            margin-top: 60px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .footer-brand .footer-logo span {
            color: var(--color-primary);
        }

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

        .footer-title {
            font-size: 14px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 16px;
            color: var(--color-text);
        }

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

        .footer-links a {
            font-size: 14px;
            color: var(--color-text-secondary);
            transition: all var(--transition-base);
        }

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

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid var(--color-border);
            font-size: 13px;
            color: var(--color-text-muted);
        }

        .footer-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .footer-badge {
            display: inline-flex;
            align-items: center;
            padding: 6px 12px;
            border-radius: var(--radius-full);
            font-size: 11px;
            font-weight: 700;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-border);
            color: var(--color-text-secondary);
            letter-spacing: 0.04em;
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 900;
            width: 56px;
            height: 56px;
            border-radius: var(--radius-full);
            background: rgba(15, 12, 32, 0.8);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            cursor: pointer;
            opacity: 0.6;
            transition: all var(--transition-base);
            position: relative;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
        }

        .fab::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: var(--radius-full);
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            z-index: -1;
            opacity: 0.7;
            transition: opacity var(--transition-base);
        }

        .fab::after {
            content: '';
            position: absolute;
            top: -2px;
            right: -2px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: #EF4444;
            border: 2px solid var(--color-bg);
            animation: blink 1.5s ease-in-out infinite;
        }

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

        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.6);
        }

        .fab:hover::before {
            opacity: 1;
        }

        .fab:active {
            transform: scale(0.95);
            box-shadow: 0 0 20px rgba(204, 255, 0, 0.5);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .page-hero h1 {
                font-size: 36px;
            }

            .promo-grid {
                grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            }
        }

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

            .nav-menu {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(15, 12, 32, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--color-border);
                transform: translateY(-110%);
                transition: transform var(--transition-base);
                z-index: 999;
                align-items: stretch;
            }

            .nav-menu.open {
                transform: translateY(0);
            }

            .nav-link {
                width: 100%;
                padding: 14px 16px;
                font-size: 15px;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-auth {
                gap: 6px;
            }

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

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

            .page-hero {
                padding: 120px 0 40px;
            }

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

            .page-hero .hero-subtitle {
                font-size: 16px;
            }

            .section-header h2 {
                font-size: 24px;
            }

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

            .promo-card {
                padding: 22px;
            }

            .promo-card .card-value {
                font-size: 30px;
            }

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

            .payment-grid {
                grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            }

            .cta-section {
                padding: 32px 24px;
            }

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

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

            .fab {
                width: 48px;
                height: 48px;
                font-size: 20px;
                left: 12px;
                bottom: 80px;
            }
        }

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

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

            .nav-logo-text span {
                font-size: 12px;
            }

            .nav-logo-icon {
                width: 36px;
                height: 36px;
                font-size: 18px;
            }

            .nav-auth .nav-login {
                display: none;
            }

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

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

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

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

            .promo-card h3 {
                font-size: 19px;
            }

            .promo-card .card-value {
                font-size: 26px;
            }

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

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

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

            .cta-section {
                padding: 24px 20px;
                border-radius: var(--radius-lg);
            }

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

            .btn-primary,
            .btn-secondary {
                width: 100%;
                padding: 12px 20px;
                font-size: 14px;
            }
        }