/* roulang page: index */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.85);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-subtle: rgba(148, 163, 184, 0.15);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.15);
            --font-primary: 'Be Vietnam Pro', 'Segoe UI', system-ui, sans-serif;
            --spacing-section: 72px;
            --transition-smooth: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

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

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: var(--transition-smooth);
        }

        a:hover {
            color: #fff;
            text-shadow: 0 0 12px var(--accent-glow);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            padding: 14px 0;
        }

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

        .logo-text {
            font-size: 1.15rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
            line-height: 1.3;
        }

        .logo-text .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: var(--shadow-glow);
            flex-shrink: 0;
        }

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

        .nav-links a {
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.92rem;
            padding: 8px 14px;
            border-radius: 20px;
            transition: var(--transition-smooth);
            display: inline-block;
        }

        .nav-links a:hover {
            color: var(--text-primary);
            background: rgba(0, 240, 255, 0.08);
        }

        .nav-links a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.1);
            box-shadow: inset 0 0 0 1px rgba(0, 240, 255, 0.3);
        }

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

        .btn-login {
            background: transparent;
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
            padding: 8px 18px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.88rem;
            cursor: pointer;
            transition: var(--transition-smooth);
        }

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

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            color: #fff;
            padding: 9px 22px;
            border-radius: 20px;
            font-weight: 700;
            font-size: 0.88rem;
            cursor: pointer;
            transition: var(--transition-smooth);
            box-shadow: 0 4px 16px rgba(0, 82, 255, 0.35);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.4);
        }

        /* Hero Section */
        .hero-section {
            position: relative;
            padding: 80px 0 60px;
            background: radial-gradient(ellipse at 50% 0%, rgba(0, 82, 255, 0.15) 0%, transparent 60%),
                        radial-gradient(ellipse at 80% 50%, rgba(0, 240, 255, 0.08) 0%, transparent 50%);
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
                              linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
        }

        .hero-stage {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
        }

        .hero-value-left,
        .hero-value-right {
            flex: 0 0 220px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .hero-value-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            background: rgba(13, 17, 30, 0.7);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 14px 16px;
            transition: var(--transition-smooth);
        }

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

        .hero-value-item i {
            color: var(--accent-cyan);
            font-size: 1.1rem;
            margin-top: 2px;
        }

        .hero-value-item span {
            font-size: 0.85rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .hero-center {
            flex: 1;
            min-width: 300px;
            max-width: 560px;
            text-align: center;
        }

        .hero-center h1 {
            font-size: clamp(2rem, 4.5vw, 3rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #fff 40%, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-center .hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 28px;
        }

        .hero-btn-group {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-primary-glow {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            color: #fff;
            padding: 14px 30px;
            border-radius: 28px;
            font-weight: 700;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition-smooth);
            box-shadow: 0 6px 24px rgba(0, 82, 255, 0.4);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-primary-glow:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(0, 240, 255, 0.5);
        }

        .btn-secondary-outline {
            background: transparent;
            border: 1px solid rgba(0, 240, 255, 0.4);
            color: var(--accent-cyan);
            padding: 14px 28px;
            border-radius: 28px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-secondary-outline:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-glow);
        }

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

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

        .hero-stat .stat-number {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-cyan);
            text-shadow: 0 0 18px rgba(0, 240, 255, 0.4);
        }

        .hero-stat .stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        /* Sections */
        .section-block {
            padding: var(--spacing-section) 0;
        }

        .section-header {
            margin-bottom: 36px;
        }

        .section-header h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }

        .section-header p {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.7;
        }

        /* Comparison Table */
        .comparison-table-wrapper {
            overflow-x: auto;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-subtle);
            background: var(--bg-card);
            backdrop-filter: blur(12px);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 650px;
        }

        .comparison-table th,
        .comparison-table td {
            padding: 16px 20px;
            text-align: left;
            border-bottom: 1px solid var(--border-subtle);
        }

        .comparison-table th {
            background: rgba(0, 82, 255, 0.08);
            color: var(--accent-cyan);
            font-weight: 700;
            font-size: 0.88rem;
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }

        .comparison-table td {
            color: var(--text-secondary);
            font-size: 0.92rem;
        }

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

        .check-icon {
            color: #00F0FF;
        }

        .cross-icon {
            color: #FF4757;
        }

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

        .tier-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

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

        .tier-card.featured {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.2);
        }

        .tier-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 12px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .tier-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .tier-card .tier-price {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-cyan);
            margin-bottom: 16px;
        }

        .tier-card ul {
            list-style: none;
            margin: 0 0 20px;
            padding: 0;
        }

        .tier-card ul li {
            padding: 8px 0;
            color: var(--text-secondary);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .tier-card ul li i {
            color: var(--accent-cyan);
            font-size: 0.8rem;
        }

        /* Info List Section */
        .info-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }

        .info-list-left {
            padding: 32px;
            background: rgba(0, 82, 255, 0.05);
        }

        .info-list-left h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .info-list-left p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .info-list-right {
            padding: 32px;
        }

        .info-list-right .info-item {
            display: flex;
            gap: 14px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-subtle);
            align-items: flex-start;
        }

        .info-list-right .info-item:last-child {
            border-bottom: none;
        }

        .info-item .info-icon {
            width: 36px;
            height: 36px;
            background: rgba(0, 240, 255, 0.1);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            flex-shrink: 0;
        }

        .info-item h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

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

        /* Brand Story */
        .brand-story-band {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.1), rgba(0, 240, 255, 0.05));
            border-radius: var(--radius-xl);
            padding: 48px 36px;
            position: relative;
            overflow: hidden;
        }

        .brand-story-band::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.12) 0%, transparent 70%);
            border-radius: 50%;
        }

        .brand-story-band h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 16px;
            position: relative;
        }

        .brand-story-band p {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.7;
            max-width: 700px;
            position: relative;
        }

        /* Review Wall */
        .review-wall {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 32px;
            align-items: start;
        }

        .review-summary {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px;
            text-align: center;
        }

        .review-summary .rating-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--accent-cyan);
            text-shadow: 0 0 24px rgba(0, 240, 255, 0.4);
        }

        .review-summary .stars {
            color: #FFD700;
            font-size: 1.2rem;
            margin: 8px 0;
        }

        .review-summary p {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .review-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .review-item {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: var(--transition-smooth);
        }

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

        .review-item .review-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 8px;
        }

        .review-item .review-name {
            font-weight: 700;
            font-size: 0.9rem;
        }

        .review-item .review-stars {
            color: #FFD700;
            font-size: 0.8rem;
        }

        .review-item p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin: 0;
            line-height: 1.6;
        }

        /* Latest Updates */
        .updates-table {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }

        .updates-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition-smooth);
            gap: 16px;
            flex-wrap: wrap;
        }

        .updates-row:last-child {
            border-bottom: none;
        }

        .updates-row:hover {
            background: rgba(0, 240, 255, 0.04);
        }

        .updates-row .update-label {
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.82rem;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            min-width: 90px;
        }

        .updates-row .update-title {
            flex: 1;
            color: var(--text-primary);
            font-weight: 500;
            font-size: 0.92rem;
        }

        .updates-row .update-status {
            font-size: 0.78rem;
            padding: 4px 12px;
            border-radius: 12px;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, var(--accent-blue), #0052CC);
            border-radius: var(--radius-xl);
            padding: 48px 36px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -10%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
            border-radius: 50%;
        }

        .cta-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1rem;
            margin-bottom: 24px;
            position: relative;
        }

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

        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-smooth);
        }

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

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 18px 24px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            text-align: left;
            transition: var(--transition-smooth);
        }

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

        .faq-question i {
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            color: var(--text-secondary);
            font-size: 0.9rem;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 20px;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 48px 0 24px;
            margin-top: 60px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-brand .logo-text {
            margin-bottom: 12px;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.6;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

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

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

        .footer-col ul a {
            color: var(--text-muted);
            font-size: 0.88rem;
            transition: var(--transition-smooth);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 20px;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.82rem;
        }

        .footer-bottom a {
            color: var(--text-muted);
        }

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

        /* FAB */
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 52px;
            height: 52px;
            background: rgba(8, 9, 15, 0.7);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(8, 9, 15, 0.7), rgba(8, 9, 15, 0.7)),
                              linear-gradient(135deg, #CCFF00, var(--accent-cyan));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.2rem;
            cursor: pointer;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            opacity: 0.6;
            transition: var(--transition-smooth);
            animation: fab-breathe 3s ease-in-out infinite;
        }

        .fab-left:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
        }

        .fab-left:active {
            transform: scale(0.95);
            background-image: linear-gradient(rgba(8, 9, 15, 0.8), rgba(8, 9, 15, 0.8)),
                              linear-gradient(135deg, #FF007F, #CCFF00);
        }

        .fab-left .fab-notification {
            position: absolute;
            top: 2px;
            right: 2px;
            width: 12px;
            height: 12px;
            background: #FF007F;
            border-radius: 50%;
            box-shadow: 0 0 10px #FF007F;
            animation: blink-neon 1.5s ease-in-out infinite;
        }

        @keyframes fab-breathe {
            0%, 100% { opacity: 0.6; }
            50% { opacity: 0.9; }
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-value-left,
            .hero-value-right {
                flex: 0 0 180px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .review-wall {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 48px;
            }

            .nav-wrapper {
                flex-wrap: wrap;
            }

            .nav-links {
                order: 3;
                width: 100%;
                justify-content: center;
                gap: 4px;
                flex-wrap: wrap;
            }

            .nav-links a {
                font-size: 0.82rem;
                padding: 6px 10px;
            }

            .hero-stage {
                flex-direction: column;
                gap: 20px;
            }

            .hero-value-left,
            .hero-value-right {
                flex: 1;
                width: 100%;
                flex-direction: row;
                flex-wrap: wrap;
                justify-content: center;
            }

            .hero-value-item {
                flex: 1;
                min-width: 160px;
            }

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

            .info-list {
                grid-template-columns: 1fr;
            }

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

            .comparison-table th,
            .comparison-table td {
                padding: 12px 14px;
                font-size: 0.82rem;
            }

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

            .brand-story-band {
                padding: 32px 24px;
            }

            .cta-section {
                padding: 36px 24px;
            }
        }

        @media (max-width: 520px) {
            .hero-center h1 {
                font-size: 1.5rem;
            }

            .hero-center .hero-desc {
                font-size: 0.92rem;
            }

            .btn-primary-glow,
            .btn-secondary-outline {
                padding: 12px 20px;
                font-size: 0.85rem;
            }

            .hero-stats {
                gap: 16px;
            }

            .hero-stat .stat-number {
                font-size: 1.3rem;
            }

            .section-header h2 {
                font-size: 1.4rem;
            }

            .updates-row {
                padding: 12px 16px;
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

/* roulang page: article */
:root {
            --bg-deep: #08090F;
            --bg-navy: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.75);
            --bg-glass: rgba(255, 255, 255, 0.04);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-hot: #FF007F;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #7B8494;
            --border-glass: rgba(0, 240, 255, 0.18);
            --border-soft: rgba(255, 255, 255, 0.08);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-glow: 0 0 30px rgba(0, 240, 255, 0.12);
            --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.45);
            --font-primary: 'Inter', 'Segoe UI', 'Roboto', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

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

        .container {
            max-width: 1240px;
            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, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-soft);
            transition: background var(--transition-smooth), border-color var(--transition-smooth);
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.96);
            border-bottom-color: rgba(0, 240, 255, 0.2);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 20px;
        }

        .logo-text {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-white);
            letter-spacing: -0.01em;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

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

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-size: 1rem;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.3);
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-links a {
            position: relative;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-muted);
            padding: 6px 0;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 2px;
            transition: width var(--transition-fast);
        }

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

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

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

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

        .btn-login {
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-silver);
            background: transparent;
            border: 1px solid var(--border-soft);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

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

        .btn-signup {
            padding: 8px 20px;
            border-radius: 8px;
            font-size: 0.88rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
            white-space: nowrap;
        }

        .btn-signup:hover {
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.5);
            transform: translateY(-1px);
        }

        .btn-signup:active {
            transform: translateY(0) scale(0.98);
        }

        /* Mobile menu toggle */
        .mobile-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 44px;
            height: 44px;
            gap: 5px;
            background: transparent;
            border: 1px solid var(--border-soft);
            border-radius: 8px;
        }

        .mobile-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-silver);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        /* Article Header Banner */
        .article-banner {
            position: relative;
            padding: 140px 0 60px;
            background: linear-gradient(180deg, var(--bg-navy) 0%, var(--bg-deep) 100%);
            overflow: hidden;
        }

        .article-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }

        .article-banner::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 50% 20%, rgba(0, 82, 255, 0.18) 0%, transparent 60%);
            pointer-events: none;
        }

        .article-banner .container {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

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

        .breadcrumb .separator {
            color: var(--text-muted);
            opacity: 0.6;
        }

        .breadcrumb .current {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        .article-meta-top {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .article-category-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 20px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.25);
            color: var(--accent-cyan);
            font-size: 0.82rem;
            font-weight: 600;
        }

        .article-date {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .article-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text-white);
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            max-width: 850px;
        }

        .article-excerpt {
            font-size: 1.1rem;
            line-height: 1.65;
            color: var(--text-silver);
            max-width: 720px;
        }

        /* Article Layout */
        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 320px;
            gap: 40px;
            padding: 50px 0 70px;
            align-items: start;
        }

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

        .article-cover {
            margin-bottom: 32px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-soft);
        }

        .article-cover img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        .article-content {
            font-size: 1.05rem;
            line-height: 1.7;
            color: var(--text-silver);
        }

        .article-content h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 36px 0 16px;
            letter-spacing: -0.01em;
        }

        .article-content h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 28px 0 12px;
        }

        .article-content p {
            margin-bottom: 16px;
        }

        .article-content ul,
        .article-content ol {
            margin: 16px 0;
            padding-left: 24px;
        }

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

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

        .article-content blockquote {
            margin: 24px 0;
            padding: 20px 24px;
            border-left: 4px solid var(--accent-cyan);
            background: var(--bg-glass);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            font-style: italic;
            color: var(--text-white);
        }

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

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

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

        /* Article not found */
        .article-not-found {
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-glass);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-soft);
        }

        .article-not-found i {
            font-size: 3rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .article-not-found h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 12px;
        }

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

        .btn-back-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 700;
            font-size: 0.95rem;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
            transition: all var(--transition-fast);
        }

        .btn-back-home:hover {
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.5);
            transform: translateY(-2px);
        }

        /* Article CTA */
        .article-cta-box {
            margin-top: 40px;
            padding: 32px;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.12), rgba(0, 240, 255, 0.08));
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            text-align: left;
        }

        .article-cta-box h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
        }

        .article-cta-box p {
            color: var(--text-silver);
            margin-bottom: 20px;
        }

        .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 13px 28px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.35);
            transition: all var(--transition-fast);
        }

        .btn-cta-primary:hover {
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.55);
            transform: translateY(-2px);
        }

        /* Sidebar */
        .article-sidebar {
            position: sticky;
            top: 88px;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .sidebar-widget {
            background: var(--bg-card);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 24px;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .sidebar-widget h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-widget h4 i {
            color: var(--accent-cyan);
            font-size: 0.95rem;
        }

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

        .sidebar-post-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
        }

        .sidebar-post-thumb {
            width: 56px;
            height: 56px;
            border-radius: 8px;
            overflow: hidden;
            flex-shrink: 0;
            border: 1px solid var(--border-soft);
        }

        .sidebar-post-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .sidebar-post-info {
            flex: 1;
            min-width: 0;
        }

        .sidebar-post-info a {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-silver);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-fast);
        }

        .sidebar-post-info a:hover {
            color: var(--accent-cyan);
        }

        .sidebar-post-date {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .sidebar-promo-box {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.15), rgba(0, 240, 255, 0.1));
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
        }

        .sidebar-promo-box .promo-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            color: #fff;
            font-size: 1.3rem;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
        }

        .sidebar-promo-box h5 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
        }

        .sidebar-promo-box p {
            font-size: 0.88rem;
            color: var(--text-silver);
            margin-bottom: 16px;
        }

        .btn-sidebar-promo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 700;
            font-size: 0.88rem;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.3);
            transition: all var(--transition-fast);
        }

        .btn-sidebar-promo:hover {
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.5);
            transform: translateY(-2px);
        }

        /* FAB */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 950;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.7);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(8, 9, 15, 0.7), rgba(8, 9, 15, 0.7)), linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            color: var(--accent-cyan);
            font-size: 1.3rem;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            opacity: 0.6;
            animation: fab-breathe 3s ease-in-out infinite;
            transition: all var(--transition-fast);
        }

        .fab-support:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.7);
        }

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

        @keyframes fab-breathe {
            0%, 100% {
                opacity: 0.6;
            }
            50% {
                opacity: 1;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--bg-navy);
            border-top: 1px solid var(--border-soft);
            padding: 50px 0 20px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-brand p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-top: 14px;
            line-height: 1.6;
            max-width: 400px;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 14px;
        }

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

        .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-soft);
            padding-top: 20px;
            text-align: center;
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .article-banner h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                gap: 0;
                padding: 12px 24px 20px;
                border-bottom: 1px solid var(--border-soft);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li {
                width: 100%;
            }
            .nav-links a {
                display: block;
                padding: 12px 0;
                border-bottom: 1px solid var(--border-soft);
                font-size: 1rem;
            }
            .nav-links li:last-child a {
                border-bottom: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .nav-cta-group .btn-login {
                padding: 7px 12px;
                font-size: 0.8rem;
            }
            .nav-cta-group .btn-signup {
                padding: 7px 14px;
                font-size: 0.8rem;
            }
            .article-banner {
                padding: 120px 0 40px;
            }
            .article-banner h1 {
                font-size: 1.7rem;
            }
            .article-excerpt {
                font-size: 0.98rem;
            }
            .article-layout {
                padding: 30px 0 50px;
            }
            .article-content {
                font-size: 0.98rem;
            }
            .article-content h2 {
                font-size: 1.35rem;
            }
            .article-content h3 {
                font-size: 1.15rem;
            }
            .article-sidebar {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .fab-support {
                left: 12px;
                bottom: 80px;
                width: 48px;
                height: 48px;
                font-size: 1.1rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .logo-text span:last-child {
                font-size: 0.82rem;
                letter-spacing: -0.02em;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.85rem;
            }
            .nav-cta-group {
                gap: 6px;
            }
            .btn-login {
                padding: 6px 10px;
                font-size: 0.75rem;
            }
            .btn-signup {
                padding: 6px 12px;
                font-size: 0.75rem;
            }
            .article-banner h1 {
                font-size: 1.45rem;
            }
            .article-meta-top {
                gap: 10px;
            }
            .article-cta-box {
                padding: 24px 20px;
            }
        }

/* roulang page: category1 */
/* ========== DESIGN VARIABLES ========== */
        :root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0F1629;
            --bg-card: rgba(16, 24, 48, 0.7);
            --bg-glass: rgba(255, 255, 255, 0.04);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-gold: #FFD700;
            --accent-green: #00E676;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #8B95A9;
            --border-glow: rgba(0, 240, 255, 0.3);
            --border-subtle: rgba(255, 255, 255, 0.08);
            --shadow-glow: 0 0 30px rgba(0, 240, 255, 0.15);
            --shadow-blue: 0 8px 32px rgba(0, 82, 255, 0.25);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --space-xs: 8px;
            --space-sm: 16px;
            --space-md: 24px;
            --space-lg: 40px;
            --space-xl: 64px;
            --space-xxl: 96px;
            --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-display: 'Playfair Display', Georgia, serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ========== BASE RESET ========== */
        *, *::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-body);
            background: var(--bg-primary);
            color: var(--text-silver);
            line-height: 1.6;
            font-size: 16px;
            overflow-x: hidden;
            position: relative;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: 
                radial-gradient(ellipse at 20% 10%, rgba(0, 82, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 90%, rgba(0, 240, 255, 0.06) 0%, transparent 50%);
            pointer-events: none;
            z-index: 0;
        }

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

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

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

        button {
            cursor: pointer;
            font-family: var(--font-body);
            border: none;
            outline: none;
            transition: var(--transition);
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--space-md);
            position: relative;
            z-index: 1;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(10, 14, 26, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            z-index: 100;
            transition: var(--transition);
        }

        .site-header.scrolled {
            background: rgba(10, 14, 26, 0.95);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--space-sm) 0;
            gap: var(--space-md);
            min-height: 70px;
        }

        .logo-text {
            display: flex;
            align-items: center;
            gap: var(--space-xs);
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text-white);
            text-decoration: none;
            letter-spacing: -0.01em;
            flex-shrink: 0;
        }

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

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-white);
            font-size: 1.1rem;
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
        }

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

        .nav-links li a {
            display: block;
            padding: var(--space-xs) var(--space-sm);
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-silver);
            text-decoration: none;
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-links li a:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-links li a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.1);
            box-shadow: inset 0 0 0 1px rgba(0, 240, 255, 0.3);
        }

        .nav-cta-group {
            display: flex;
            align-items: center;
            gap: var(--space-xs);
            flex-shrink: 0;
        }

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

        .btn-login:hover {
            color: var(--text-white);
            border-color: var(--text-muted);
            background: rgba(255, 255, 255, 0.05);
        }

        .btn-signup {
            padding: 10px 24px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: var(--text-white);
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 700;
            box-shadow: 0 4px 20px rgba(0, 82, 255, 0.5);
            transition: var(--transition);
            white-space: nowrap;
            position: relative;
            overflow: hidden;
        }

        .btn-signup::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.6s;
        }

        .btn-signup:hover {
            box-shadow: 0 6px 30px rgba(0, 240, 255, 0.6);
            transform: translateY(-1px);
            color: var(--text-white);
        }

        .btn-signup:hover::before {
            left: 100%;
        }

        /* Mobile nav toggle */
        .nav-toggle {
            display: none;
            background: transparent;
            color: var(--text-white);
            font-size: 1.5rem;
            padding: var(--space-xs);
            border: none;
        }

        /* ========== HERO SECTION ========== */
        .hero {
            padding: calc(var(--space-xxl) + 40px) 0 var(--space-xl);
            position: relative;
            overflow: hidden;
            min-height: 85vh;
            display: flex;
            align-items: center;
        }

        .hero-bg {
            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;
            background-repeat: no-repeat;
            z-index: 0;
        }

        .hero-bg::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, rgba(10, 14, 26, 0.85) 0%, rgba(10, 14, 26, 0.6) 50%, rgba(10, 14, 26, 0.9) 100%);
        }

        .hero-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 70% 30%, rgba(0, 240, 255, 0.1) 0%, transparent 60%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 680px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: var(--space-xs);
            padding: 8px 16px;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: 50px;
            color: var(--accent-cyan);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            margin-bottom: var(--space-md);
            animation: pulseBadge 3s ease-in-out infinite;
        }

        @keyframes pulseBadge {
            0%, 100% { box-shadow: 0 0 10px rgba(0, 240, 255, 0.2); }
            50% { box-shadow: 0 0 25px rgba(0, 240, 255, 0.5); }
        }

        .hero h1 {
            font-family: var(--font-display);
            font-size: 3.5rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: var(--space-md);
        }

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

        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-silver);
            line-height: 1.7;
            margin-bottom: var(--space-lg);
            max-width: 560px;
        }

        .hero-cta-group {
            display: flex;
            gap: var(--space-sm);
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: var(--space-xs);
            padding: 14px 32px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: var(--text-white);
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 700;
            box-shadow: 0 6px 30px rgba(0, 82, 255, 0.5);
            transition: var(--transition);
            text-decoration: none;
            position: relative;
            overflow: hidden;
        }

        .btn-primary::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
            transition: left 0.7s;
        }

        .btn-primary:hover {
            box-shadow: 0 8px 40px rgba(0, 240, 255, 0.7);
            transform: translateY(-2px);
            color: var(--text-white);
        }

        .btn-primary:hover::before {
            left: 100%;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: var(--space-xs);
            padding: 14px 28px;
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-white);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 600;
            transition: var(--transition);
            text-decoration: none;
            backdrop-filter: blur(10px);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.2);
            color: var(--text-white);
            transform: translateY(-1px);
        }

        /* ========== TRUST BADGES ========== */
        .trust-badges {
            display: flex;
            gap: var(--space-md);
            margin-top: var(--space-lg);
            flex-wrap: wrap;
        }

        .trust-badge-item {
            display: flex;
            align-items: center;
            gap: var(--space-xs);
            color: var(--text-muted);
            font-size: 0.85rem;
            font-weight: 500;
        }

        .trust-badge-item i {
            color: var(--accent-green);
            font-size: 0.9rem;
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: var(--space-xl) 0;
            position: relative;
        }

        .section-header {
            margin-bottom: var(--space-lg);
            max-width: 700px;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            margin-bottom: var(--space-xs);
        }

        .section-title {
            font-family: var(--font-display);
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--text-white);
            line-height: 1.25;
            letter-spacing: -0.01em;
            margin-bottom: var(--space-sm);
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ========== PAIN POINT SECTION ========== */
        .pain-points {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .pain-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: var(--space-md);
            margin-top: var(--space-lg);
        }

        .pain-card {
            background: var(--bg-glass);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: var(--space-lg);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .pain-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
            opacity: 0;
            transition: var(--transition);
        }

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

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

        .pain-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: rgba(0, 240, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: var(--space-sm);
            font-size: 1.4rem;
            color: var(--accent-cyan);
        }

        .pain-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: var(--space-xs);
        }

        .pain-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ========== SOLUTION SECTION ========== */
        .solution-section {
            position: relative;
        }

        .solution-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--space-xl);
            align-items: center;
        }

        .solution-image {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
        }

        .solution-image img {
            width: 100%;
            height: 420px;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }

        .solution-image::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, rgba(10, 14, 26, 0.2) 0%, rgba(10, 14, 26, 0.7) 100%);
            pointer-events: none;
        }

        .solution-steps {
            list-style: none;
            padding: 0;
            margin: var(--space-md) 0;
        }

        .solution-steps li {
            display: flex;
            gap: var(--space-sm);
            margin-bottom: var(--space-md);
            align-items: flex-start;
        }

        .step-number {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--text-white);
            flex-shrink: 0;
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
        }

        .step-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 2px;
        }

        .step-content p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 0;
        }

        /* ========== RESULTS / STATS ========== */
        .results-section {
            background: linear-gradient(180deg, var(--bg-secondary), var(--bg-primary));
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: var(--space-md);
            margin-top: var(--space-lg);
        }

        .stat-item {
            text-align: center;
            padding: var(--space-lg);
            background: var(--bg-glass);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-subtle);
            transition: var(--transition);
        }

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

        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            font-family: var(--font-display);
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.1;
            margin-bottom: var(--space-xs);
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ========== TESTIMONIALS ========== */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: var(--space-md);
            margin-top: var(--space-lg);
        }

        .testimonial-card {
            background: var(--bg-glass);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: var(--space-lg);
            transition: var(--transition);
            position: relative;
        }

        .testimonial-card::before {
            content: '"';
            position: absolute;
            top: var(--space-sm);
            right: var(--space-md);
            font-size: 4rem;
            font-family: var(--font-display);
            color: rgba(0, 240, 255, 0.1);
            line-height: 1;
        }

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

        .testimonial-text {
            font-size: 0.95rem;
            color: var(--text-silver);
            line-height: 1.7;
            margin-bottom: var(--space-md);
            font-style: italic;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: var(--space-xs);
        }

        .testimonial-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-white);
            font-weight: 700;
            font-size: 0.9rem;
        }

        .testimonial-name {
            font-weight: 700;
            color: var(--text-white);
            font-size: 0.9rem;
        }

        .testimonial-role {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.15), rgba(0, 240, 255, 0.1));
            border-top: 1px solid var(--border-glow);
            border-bottom: 1px solid var(--border-glow);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 60%);
            pointer-events: none;
        }

        .cta-content {
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .cta-content h2 {
            font-family: var(--font-display);
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: var(--space-sm);
        }

        .cta-content p {
            font-size: 1.1rem;
            color: var(--text-silver);
            margin-bottom: var(--space-lg);
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== FAQ SECTION ========== */
        .faq-list {
            max-width: 800px;
            margin: var(--space-lg) auto 0;
        }

        .faq-item {
            background: var(--bg-glass);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            margin-bottom: var(--space-sm);
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--space-sm);
            padding: var(--space-md);
            background: transparent;
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 600;
            text-align: left;
            transition: var(--transition);
        }

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

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            color: var(--accent-cyan);
            transition: var(--transition);
        }

        .faq-question.active .faq-icon {
            transform: rotate(45deg);
            background: rgba(0, 240, 255, 0.2);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 var(--space-md);
        }

        .faq-answer.open {
            max-height: 300px;
            padding: 0 var(--space-md) var(--space-md);
        }

        .faq-answer p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: var(--space-xl) 0 var(--space-sm);
            position: relative;
            z-index: 1;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: var(--space-xl);
            margin-bottom: var(--space-xl);
        }

        .footer-brand .logo-text {
            margin-bottom: var(--space-sm);
            font-size: 1rem;
        }

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

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: var(--space-sm);
        }

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

        .footer-col ul li {
            margin-bottom: var(--space-xs);
        }

        .footer-col ul li a {
            font-size: 0.9rem;
            color: var(--text-muted);
            text-decoration: none;
            transition: var(--transition);
        }

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

        .footer-bottom {
            padding-top: var(--space-md);
            border-top: 1px solid var(--border-subtle);
            text-align: center;
        }

        .footer-bottom p {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin: 0;
        }

        /* ========== FAB ========== */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(10, 14, 26, 0.85);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(10, 14, 26, 0.85), rgba(10, 14, 26, 0.85)), linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.5rem;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
            transition: var(--transition);
            opacity: 0.65;
            animation: fabBreath 3s ease-in-out infinite;
            cursor: pointer;
            text-decoration: none;
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.7);
            color: var(--text-white);
        }

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

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

        @keyframes fabBreath {
            0%, 100% { opacity: 0.65; }
            50% { opacity: 0.9; }
        }

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

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 2.8rem;
            }
            
            .solution-grid {
                grid-template-columns: 1fr;
                gap: var(--space-lg);
            }
            
            .solution-image img {
                height: 320px;
            }
            
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--space-lg);
            }
            
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            
            .nav-links {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: rgba(10, 14, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: var(--space-md);
                border-bottom: 1px solid var(--border-subtle);
                gap: var(--space-xs);
            }
            
            .nav-links.open {
                display: flex;
            }
            
            .nav-links li {
                width: 100%;
            }
            
            .nav-links li a {
                padding: var(--space-sm);
                display: block;
                width: 100%;
            }
            
            .nav-cta-group .btn-login {
                padding: 8px 14px;
                font-size: 0.8rem;
            }
            
            .nav-cta-group .btn-signup {
                padding: 8px 16px;
                font-size: 0.8rem;
            }
            
            .hero {
                min-height: auto;
                padding: calc(var(--space-xl) + 40px) 0 var(--space-lg);
            }
            
            .hero h1 {
                font-size: 2rem;
            }
            
            .hero-subtitle {
                font-size: 1rem;
            }
            
            .section-title {
                font-size: 1.8rem;
            }
            
            .cta-content h2 {
                font-size: 1.8rem;
            }
            
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .testimonials-grid {
                grid-template-columns: 1fr;
            }
            
            .pain-grid {
                grid-template-columns: 1fr;
            }
            
            .logo-text span:last-child {
                font-size: 0.85rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 var(--space-sm);
            }
            
            .nav-wrapper {
                gap: var(--space-xs);
            }
            
            .logo-text span:last-child {
                display: none;
            }
            
            .hero h1 {
                font-size: 1.6rem;
            }
            
            .hero-cta-group {
                flex-direction: column;
                width: 100%;
            }
            
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            
            .section-title {
                font-size: 1.5rem;
            }
            
            .stats-grid {
                grid-template-columns: 1fr;
            }
            
            .stat-number {
                font-size: 2rem;
            }
            
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--space-md);
            }
            
            .fab {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 12px;
                bottom: 80px;
            }
        }

/* roulang page: category2 */
:root {
            --primary-bg: #0D111E;
            --secondary-bg: #131A2A;
            --card-bg: rgba(19, 26, 42, 0.7);
            --glass-bg: rgba(255, 255, 255, 0.04);
            --glass-border: rgba(255, 255, 255, 0.08);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #8B94A7;
            --border-subtle: rgba(203, 213, 225, 0.1);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-primary: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
        }

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            background: rgba(13, 17, 30, 0.9);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            position: sticky;
            top: 0;
            z-index: 100;
            transition: var(--transition);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            gap: 20px;
        }

        .logo-text {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            color: var(--text-primary);
            font-weight: 700;
            font-size: 1.1rem;
            letter-spacing: -0.01em;
            transition: var(--transition);
            white-space: nowrap;
        }

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

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 8px;
            margin: 0;
        }

        .nav-links a {
            display: block;
            padding: 8px 16px;
            text-decoration: none;
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            border-radius: 50px;
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-links a:hover {
            color: var(--text-primary);
            background: var(--glass-bg);
        }

        .nav-links a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
            box-shadow: inset 0 0 0 1px rgba(0, 240, 255, 0.2);
        }

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

        .btn-login,
        .btn-signup {
            padding: 9px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            white-space: nowrap;
        }

        .btn-login {
            background: transparent;
            color: var(--text-secondary);
            border: 1px solid var(--border-subtle);
        }

        .btn-login:hover {
            color: var(--text-primary);
            border-color: var(--text-muted);
            background: var(--glass-bg);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            box-shadow: 0 4px 16px rgba(0, 82, 255, 0.35);
        }

        .btn-signup:hover {
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.5);
            transform: translateY(-1px);
        }

        .btn-signup:active,
        .btn-login:active {
            transform: scale(0.96);
        }

        /* Mobile nav toggle */
        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
            width: 42px;
            height: 42px;
            border-radius: 10px;
            cursor: pointer;
            font-size: 1.2rem;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .nav-toggle:hover {
            background: var(--glass-bg);
            border-color: var(--text-muted);
        }

        /* ===== Hero (Creator Profile Style) ===== */
        .hero-section {
            background: linear-gradient(180deg, var(--secondary-bg) 0%, var(--primary-bg) 100%);
            position: relative;
            overflow: hidden;
            padding: 60px 0 50px;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -200px;
            right: -200px;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.15), transparent 70%);
            pointer-events: none;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -150px;
            left: -100px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08), transparent 70%);
            pointer-events: none;
        }

        .hero-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-info {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .creator-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: 50px;
            padding: 6px 16px;
            font-size: 0.8rem;
            color: var(--accent-cyan);
            width: fit-content;
            letter-spacing: 0.05em;
        }

        .creator-badge i {
            font-size: 0.7rem;
        }

        .hero-info h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin: 0;
        }

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

        .hero-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 480px;
        }

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

        .btn-primary,
        .btn-secondary {
            padding: 12px 28px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            box-shadow: 0 6px 24px rgba(0, 82, 255, 0.4);
        }

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

        .btn-secondary {
            background: var(--glass-bg);
            color: var(--text-primary);
            border: 1px solid var(--glass-border);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--text-muted);
        }

        .hero-stats {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            margin-top: 8px;
        }

        .stat-item {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .stat-number {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
        }

        .stat-label {
            font-size: 0.75rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.08em;
        }

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

        .hero-visual img {
            width: 100%;
            max-width: 480px;
            height: auto;
            border-radius: var(--radius-lg);
            border: 1px solid var(--glass-border);
            box-shadow: var(--shadow-card), 0 0 40px rgba(0, 240, 255, 0.1);
            transition: var(--transition);
        }

        .hero-visual img:hover {
            box-shadow: var(--shadow-card), 0 0 60px rgba(0, 240, 255, 0.2);
            transform: scale(1.01);
        }

        /* ===== Main Content Sections ===== */
        .content-section {
            padding: 50px 0;
            border-bottom: 1px solid var(--border-subtle);
        }

        .content-section:last-of-type {
            border-bottom: none;
        }

        .section-header {
            margin-bottom: 32px;
            max-width: 720px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.75rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }

        .section-header h2 {
            font-size: 1.8rem;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }

        .section-header p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* Steps / Process */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 24px;
        }

        .step-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .step-card:hover {
            border-color: rgba(0, 240, 255, 0.3);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
            transform: translateY(-4px);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 800;
            font-size: 0.9rem;
            margin-bottom: 14px;
            box-shadow: 0 4px 12px rgba(0, 82, 255, 0.3);
        }

        .step-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .step-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* Tips List */
        .tips-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-top: 24px;
        }

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

        .tip-item:hover {
            border-color: rgba(0, 240, 255, 0.25);
            background: rgba(255, 255, 255, 0.06);
        }

        .tip-icon {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(0, 240, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1rem;
        }

        .tip-content h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text-primary);
        }

        .tip-content p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* Info Block with Image */
        .info-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
            margin-top: 24px;
        }

        .info-block img {
            width: 100%;
            height: auto;
            border-radius: var(--radius-md);
            border: 1px solid var(--glass-border);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }

        .info-block img:hover {
            box-shadow: var(--shadow-card), 0 0 30px rgba(0, 240, 255, 0.15);
        }

        .info-text h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.35;
        }

        .info-text p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .info-text ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .info-text ul li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-secondary);
        }

        .info-text ul li i {
            color: var(--accent-cyan);
            font-size: 0.8rem;
        }

        /* FAQ */
        .faq-list {
            margin-top: 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

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

        .faq-question {
            width: 100%;
            padding: 18px 20px;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            text-align: left;
            transition: var(--transition);
        }

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

        .faq-question i {
            font-size: 0.85rem;
            transition: var(--transition);
            color: var(--text-muted);
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--accent-cyan);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 20px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }

        .faq-answer p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.08), rgba(0, 240, 255, 0.05));
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            margin-top: 32px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -100px;
            left: 50%;
            transform: translateX(-50%);
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.1), transparent 70%);
            pointer-events: none;
        }

        .cta-section h3 {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 10px;
            letter-spacing: -0.02em;
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
        }

        .cta-section .btn-primary {
            position: relative;
            z-index: 1;
            font-size: 1rem;
            padding: 14px 36px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-subtle);
            padding: 48px 0 24px;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-brand .logo-text {
            font-size: 0.95rem;
            margin-bottom: 14px;
            white-space: normal;
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 380px;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

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

        .footer-col ul a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.85rem;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 20px;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin: 0;
        }

        /* ===== FAB ===== */
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(13, 17, 30, 0.7);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(13, 17, 30, 0.7), rgba(13, 17, 30, 0.7)), linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.3rem;
            cursor: pointer;
            box-shadow: var(--shadow-glow);
            opacity: 0.6;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            animation: fab-breathe 3s ease-in-out infinite;
        }

        .fab-left:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
            animation: none;
        }

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

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

        @keyframes fab-breathe {
            0%, 100% { opacity: 0.6; }
            50% { opacity: 0.85; }
        }

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

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-content {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            
            .hero-info h1 {
                font-size: 2rem;
            }
            
            .hero-visual img {
                max-width: 100%;
            }
            
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .info-block {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            .nav-wrapper {
                flex-wrap: wrap;
                gap: 12px;
                position: relative;
            }
            
            .nav-toggle {
                display: flex;
                order: 3;
                margin-left: auto;
            }
            
            .nav-links {
                display: none;
                width: 100%;
                flex-direction: column;
                order: 4;
                background: var(--secondary-bg);
                border-radius: var(--radius-sm);
                border: 1px solid var(--glass-border);
                padding: 8px;
                gap: 4px;
            }
            
            .nav-links.open {
                display: flex;
            }
            
            .nav-links a {
                padding: 10px 16px;
                border-radius: 6px;
            }
            
            .nav-cta-group {
                order: 2;
                gap: 8px;
            }
            
            .btn-login,
            .btn-signup {
                padding: 7px 14px;
                font-size: 0.78rem;
            }
            
            .logo-text {
                font-size: 0.9rem;
                order: 1;
            }
            
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 0.9rem;
            }
            
            .hero-section {
                padding: 36px 0 32px;
            }
            
            .hero-info h1 {
                font-size: 1.6rem;
            }
            
            .hero-subtitle {
                font-size: 0.92rem;
            }
            
            .hero-stats {
                gap: 16px;
            }
            
            .stat-number {
                font-size: 1.2rem;
            }
            
            .steps-grid {
                grid-template-columns: 1fr;
            }
            
            .content-section {
                padding: 36px 0;
            }
            
            .section-header h2 {
                font-size: 1.45rem;
            }
            
            .cta-section {
                padding: 28px 20px;
            }
            
            .cta-section h3 {
                font-size: 1.2rem;
            }
            
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            
            .fab-left {
                width: 48px;
                height: 48px;
                font-size: 1.1rem;
                left: 12px;
                bottom: 80px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }
            
            .nav-wrapper {
                gap: 8px;
            }
            
            .logo-text span:last-child {
                font-size: 0.78rem;
            }
            
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.8rem;
            }
            
            .btn-login,
            .btn-signup {
                padding: 6px 10px;
                font-size: 0.7rem;
            }
            
            .hero-info h1 {
                font-size: 1.35rem;
            }
            
            .hero-actions {
                gap: 8px;
            }
            
            .btn-primary,
            .btn-secondary {
                padding: 10px 20px;
                font-size: 0.82rem;
            }
            
            .section-header h2 {
                font-size: 1.25rem;
            }
            
            .tip-item {
                padding: 14px;
                gap: 10px;
            }
            
            .tip-icon {
                width: 32px;
                height: 32px;
                font-size: 0.85rem;
            }
            
            .faq-question {
                padding: 14px 16px;
                font-size: 0.85rem;
            }
        }