/* roulang page: index */
:root {
            --primary-bg: #0B1A30;
            --secondary-bg: #0F0C20;
            --surface: #132340;
            --surface-light: #1A2F4D;
            --accent-cyan: #00F0FF;
            --accent-lime: #CCFF00;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --text-muted: #6B7A90;
            --border-neon: #1E3A5F;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.25);
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.45);
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --spacing-xl: 6rem;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            background: var(--primary-bg);
            color: var(--text-white);
            font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', sans-serif;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        button, .button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 26, 48, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-neon);
            padding: 0.75rem 0;
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--text-white);
            letter-spacing: -0.02em;
            line-height: 1.3;
        }

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

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            flex-wrap: wrap;
        }

        .nav-links a {
            color: var(--text-silver);
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
        }

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

        .nav-auth {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .btn-login {
            color: var(--text-silver);
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            transition: color var(--transition);
        }

        .btn-login:hover {
            color: var(--text-white);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-cyan), #0099CC);
            color: #0B1A30;
            font-weight: 700;
            padding: 0.5rem 1.25rem;
            border-radius: 20px;
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.35);
            transition: all var(--transition);
        }

        .btn-signup:hover {
            background: linear-gradient(135deg, var(--accent-lime), #99CC00);
            color: #0B1A30;
            box-shadow: 0 0 20px rgba(204, 255, 0, 0.45);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            font-size: 1.5rem;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
        }

        /* Hero Section */
        .hero-section {
            position: relative;
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            background: radial-gradient(ellipse at 30% 20%, rgba(0, 240, 255, 0.08) 0%, transparent 55%),
                        radial-gradient(ellipse at 80% 70%, rgba(204, 255, 0, 0.06) 0%, transparent 50%);
            overflow: hidden;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-lg);
            align-items: center;
        }

        .hero-content h1 {
            font-size: 2.75rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.03em;
            background: linear-gradient(135deg, #FFFFFF 30%, var(--accent-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-content .hero-desc {
            font-size: 1.1rem;
            color: var(--text-silver);
            line-height: 1.7;
            margin-bottom: var(--spacing-md);
            max-width: 560px;
        }

        .hero-actions {
            display: flex;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
            margin-bottom: var(--spacing-md);
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-cyan), #0099CC);
            color: #0B1A30;
            font-weight: 700;
            padding: 0.85rem 1.75rem;
            border-radius: 30px;
            font-size: 1rem;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, var(--accent-lime), #99CC00);
            box-shadow: 0 0 30px rgba(204, 255, 0, 0.4);
            transform: translateY(-2px);
            color: #0B1A30;
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-white);
            font-weight: 600;
            padding: 0.85rem 1.75rem;
            border-radius: 30px;
            font-size: 1rem;
            border: 1px solid var(--border-neon);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

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

        .hero-stats {
            display: flex;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
        }

        .hero-stat .stat-value {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.2;
        }

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

        /* Progress Ring Hero (Crowdfunding Style) */
        .hero-visual {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .progress-ring-wrapper {
            position: relative;
            width: 100%;
            max-width: 420px;
            margin: 0 auto;
        }

        .progress-ring-bg {
            width: 100%;
            aspect-ratio: 1;
            border-radius: 50%;
            background: conic-gradient(var(--accent-cyan) 0% 72%, rgba(255, 255, 255, 0.08) 72% 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.2);
            position: relative;
        }

        .progress-ring-inner {
            width: 82%;
            aspect-ratio: 1;
            border-radius: 50%;
            background: var(--primary-bg);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: var(--spacing-md);
            text-align: center;
        }

        .progress-percent {
            font-size: 3rem;
            font-weight: 900;
            color: var(--accent-lime);
            line-height: 1;
        }

        .progress-status {
            font-size: 1rem;
            color: var(--text-silver);
            margin-top: 0.5rem;
        }

        .progress-detail {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 0.25rem;
        }

        .tier-preview {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 0.75rem;
            margin-top: var(--spacing-md);
        }

        .tier-chip {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-sm);
            padding: 0.75rem;
            text-align: center;
            transition: all var(--transition);
        }

        .tier-chip:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.15);
            transform: translateY(-2px);
        }

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

        .tier-chip .tier-desc {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 0.25rem;
        }

        /* Section Styles */
        .section {
            padding: var(--spacing-lg) 0;
            position: relative;
        }

        .section-header {
            margin-bottom: var(--spacing-md);
        }

        .section-tag {
            display: inline-block;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            letter-spacing: 0.05em;
            margin-bottom: 0.75rem;
            text-transform: uppercase;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
            color: var(--text-white);
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-silver);
            line-height: 1.7;
            max-width: 720px;
        }

        /* Series Navigation */
        .series-nav-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .series-nav-card {
            background: var(--surface);
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .series-nav-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-lime));
            opacity: 0;
            transition: opacity var(--transition);
        }

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

        .series-nav-card:hover::before {
            opacity: 1;
        }

        .series-nav-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(0, 240, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
        }

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

        .series-nav-card p {
            font-size: 0.95rem;
            color: var(--text-silver);
            line-height: 1.6;
            flex: 1;
        }

        .series-nav-link {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
        }

        /* Showcase / Featured */
        .showcase-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
        }

        .showcase-card {
            background: var(--surface);
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
            position: relative;
        }

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

        .showcase-card .card-image {
            aspect-ratio: 16/10;
            overflow: hidden;
            position: relative;
        }

        .showcase-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .showcase-card:hover .card-image img {
            transform: scale(1.05);
        }

        .showcase-card .card-body {
            padding: var(--spacing-sm);
        }

        .showcase-card .card-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 0.4rem;
        }

        .showcase-card .card-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        .showcase-badge {
            position: absolute;
            top: 0.75rem;
            left: 0.75rem;
            background: rgba(255, 0, 127, 0.9);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 0.25rem 0.6rem;
            border-radius: 4px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        /* Info / CMS List */
        .info-layout {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: var(--spacing-lg);
        }

        .info-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .info-item {
            background: var(--surface);
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-sm);
            padding: var(--spacing-sm);
            transition: all var(--transition);
            display: flex;
            align-items: flex-start;
            gap: var(--spacing-sm);
        }

        .info-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.12);
        }

        .info-item .info-icon {
            width: 36px;
            height: 36px;
            min-width: 36px;
            border-radius: 8px;
            background: rgba(0, 240, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1rem;
        }

        .info-item .info-content h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 0.25rem;
        }

        .info-item .info-content p {
            font-size: 0.9rem;
            color: var(--text-silver);
            line-height: 1.5;
        }

        .info-item .info-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 0.35rem;
            display: flex;
            gap: 0.75rem;
        }

        .info-sidebar {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }

        .sidebar-card {
            background: var(--surface);
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
        }

        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: var(--spacing-sm);
        }

        .sidebar-card ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .sidebar-card ul li a {
            color: var(--text-silver);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: color var(--transition);
        }

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

        /* Membership CTA */
        .membership-cta {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(204, 255, 0, 0.05));
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            position: relative;
            overflow: hidden;
        }

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

        .membership-cta-content {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: var(--spacing-md);
            align-items: center;
        }

        .membership-cta h2 {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 0.5rem;
        }

        .membership-cta p {
            font-size: 1rem;
            color: var(--text-silver);
            line-height: 1.7;
        }

        /* Footer */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-neon);
            padding: var(--spacing-lg) 0 var(--spacing-md);
            margin-top: var(--spacing-lg);
        }

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

        .footer-brand h3 {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 0.75rem;
        }

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

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

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

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

        .footer-bottom {
            border-top: 1px solid var(--border-neon);
            padding-top: var(--spacing-sm);
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* FAB */
        .fab-support {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(15, 12, 32, 0.85), rgba(15, 12, 32, 0.85)), linear-gradient(135deg, var(--accent-lime), 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: 1.5rem;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
            transition: all var(--transition);
            opacity: 0.75;
        }

        .fab-support:hover {
            opacity: 1;
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.6);
            transform: scale(1.1);
        }

        .fab-support:active {
            transform: scale(0.95);
            border-color: #FF007F;
            box-shadow: 0 0 20px rgba(255, 0, 127, 0.5);
        }

        .fab-notification {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 12px;
            height: 12px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid var(--secondary-bg);
            animation: blink-notification 1.5s infinite;
        }

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

        /* FAQ Accordion */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

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

        .faq-item:hover {
            border-color: rgba(0, 240, 255, 0.4);
        }

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

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

        .faq-question i {
            transition: transform var(--transition);
            color: var(--accent-cyan);
        }

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

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

        .faq-answer.active {
            max-height: 300px;
            padding-bottom: var(--spacing-sm);
        }

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

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

            .hero-content h1 {
                font-size: 2.25rem;
            }

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

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

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

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

        @media (max-width: 768px) {
            .nav-wrapper {
                flex-direction: column;
                align-items: stretch;
            }

            .nav-logo {
                justify-content: space-between;
            }

            .mobile-toggle {
                display: flex;
            }

            .nav-links {
                display: none;
                flex-direction: column;
                align-items: stretch;
                padding: var(--spacing-sm) 0;
            }

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

            .nav-links a {
                padding: 0.75rem 1rem;
                border-radius: 8px;
            }

            .nav-auth {
                display: none;
            }

            .nav-auth.mobile-show {
                display: flex;
                flex-direction: column;
                padding: var(--spacing-sm) 0;
            }

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

            .hero-content h1 {
                font-size: 1.85rem;
            }

            .hero-section {
                padding: var(--spacing-lg) 0;
            }

            .section {
                padding: var(--spacing-md) 0;
            }

            .section-title {
                font-size: 1.6rem;
            }

            .tier-preview {
                grid-template-columns: repeat(3, 1fr);
                gap: 0.5rem;
            }
        }

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

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

            .hero-desc {
                font-size: 0.95rem;
            }

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

            .series-nav-grid {
                grid-template-columns: 1fr;
            }

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

            .hero-stats {
                gap: var(--spacing-sm);
            }

            .hero-stat .stat-value {
                font-size: 1.4rem;
            }

            .progress-percent {
                font-size: 2.25rem;
            }

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

            .fab-support {
                width: 48px;
                height: 48px;
                font-size: 1.25rem;
                bottom: 5rem;
            }
        }

/* roulang page: article */
:root {
            --bg-deep: #0A0E1A;
            --bg-card: rgba(18, 25, 48, 0.75);
            --bg-glass: rgba(10, 14, 26, 0.65);
            --accent-blue: #0077FF;
            --accent-cyan: #00E5FF;
            --accent-glow: rgba(0, 229, 255, 0.45);
            --accent-blue-glow: rgba(0, 119, 255, 0.35);
            --text-primary: #FFFFFF;
            --text-secondary: #B8C4D9;
            --text-muted: #7A8BA3;
            --border-glass: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(0, 229, 255, 0.45);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 28px var(--accent-glow);
            --font-main: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 32px;
            --spacing-lg: 56px;
            --spacing-xl: 80px;
            --transition-fast: 0.18s ease;
            --transition-base: 0.3s 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-main);
            background: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image: 
                radial-gradient(ellipse at 15% 20%, rgba(0, 119, 255, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 85% 75%, rgba(0, 229, 255, 0.06) 0%, transparent 50%),
                linear-gradient(180deg, #0A0E1A 0%, #0D1428 40%, #0A0E1A 100%);
            min-height: 100vh;
        }

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

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

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        /* ===== HEADER ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 14, 26, 0.82);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border-bottom: 1px solid var(--border-glass);
            padding: 14px 0;
            transition: background var(--transition-base), box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(10, 14, 26, 0.95);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .nav-logo i {
            color: var(--accent-cyan);
            font-size: 1.35rem;
            filter: drop-shadow(0 0 8px var(--accent-glow));
        }

        .nav-logo span {
            background: linear-gradient(135deg, #FFFFFF 0%, #B8E6FF 60%, var(--accent-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }

        .nav-links a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 999px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-links a i {
            font-size: 0.82rem;
            opacity: 0.8;
        }

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

        .nav-links a.active {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.1);
            border: 1px solid rgba(0, 229, 255, 0.25);
        }

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

        .btn-login {
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
            border: 1px solid var(--border-glass);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-login:hover {
            border-color: rgba(255, 255, 255, 0.3);
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-primary);
        }

        .btn-signup {
            padding: 8px 20px;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 700;
            color: #0A0E1A;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 100%);
            border: none;
            box-shadow: 0 4px 16px rgba(0, 229, 255, 0.3);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-signup:hover {
            color: #0A0E1A;
            box-shadow: 0 6px 24px rgba(0, 229, 255, 0.45);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 1.2rem;
            padding: 8px 12px;
            transition: all var(--transition-fast);
        }

        .mobile-toggle:hover {
            border-color: var(--border-hover);
            background: rgba(255, 255, 255, 0.05);
        }

        /* ===== ARTICLE PAGE HERO ===== */
        .article-hero {
            padding: 140px 0 40px;
            position: relative;
            overflow: hidden;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 0;
        }

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

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

        .breadcrumb-nav a {
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 6px;
        }

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

        .breadcrumb-nav .separator {
            opacity: 0.5;
        }

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

        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: var(--spacing-sm);
        }

        .article-meta .meta-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            background: rgba(0, 229, 255, 0.1);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 229, 255, 0.2);
        }

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

        .article-meta .meta-date i {
            color: var(--accent-cyan);
            font-size: 0.8rem;
        }

        .article-hero h1 {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-sm);
            background: linear-gradient(135deg, #FFFFFF 0%, #D6E8FF 50%, var(--accent-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .article-hero .hero-summary {
            font-size: 1.08rem;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.7;
        }

        /* ===== ARTICLE CONTENT ===== */
        .article-main {
            padding: var(--spacing-md) 0 var(--spacing-xl);
        }

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

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

        .article-content {
            background: var(--bg-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg) var(--spacing-md);
            box-shadow: var(--shadow-card);
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.75;
        }

        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: var(--spacing-md) 0 var(--spacing-sm);
            letter-spacing: -0.01em;
            line-height: 1.35;
        }

        .article-content h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: var(--spacing-sm) 0 var(--spacing-xs);
            line-height: 1.4;
        }

        .article-content p {
            margin-bottom: var(--spacing-sm);
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: var(--spacing-sm) 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .article-content a {
            color: var(--accent-cyan);
            border-bottom: 1px solid rgba(0, 229, 255, 0.3);
            transition: all var(--transition-fast);
        }

        .article-content a:hover {
            border-bottom-color: var(--accent-cyan);
            color: var(--text-primary);
        }

        .article-content ul,
        .article-content ol {
            margin: var(--spacing-sm) 0;
            padding-left: 1.5rem;
        }

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

        .article-content blockquote {
            border-left: 3px solid var(--accent-cyan);
            padding: var(--spacing-sm) var(--spacing-md);
            margin: var(--spacing-md) 0;
            background: rgba(0, 229, 255, 0.05);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-primary);
            font-style: italic;
        }

        .article-not-found {
            text-align: center;
            padding: var(--spacing-xl) var(--spacing-md);
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
        }

        .article-not-found i {
            font-size: 3rem;
            color: var(--text-muted);
            margin-bottom: var(--spacing-sm);
            display: block;
        }

        .article-not-found h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: var(--spacing-xs);
        }

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

        .article-not-found .btn-return {
            display: inline-block;
            padding: 12px 28px;
            border-radius: 999px;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 100%);
            color: #0A0E1A;
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 4px 16px rgba(0, 229, 255, 0.3);
            transition: all var(--transition-fast);
        }

        .article-not-found .btn-return:hover {
            box-shadow: 0 6px 24px rgba(0, 229, 255, 0.5);
            transform: translateY(-2px);
            color: #0A0E1A;
        }

        /* ===== ARTICLE SIDEBAR ===== */
        .article-sidebar {
            position: sticky;
            top: 100px;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }

        .sidebar-card {
            background: var(--bg-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            box-shadow: var(--shadow-card);
        }

        .sidebar-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: var(--spacing-sm);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card h3 i {
            color: var(--accent-cyan);
            font-size: 0.95rem;
        }

        .sidebar-card .sidebar-link {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 0.88rem;
            transition: all var(--transition-fast);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

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

        .sidebar-card .sidebar-link:hover {
            background: rgba(0, 229, 255, 0.06);
            color: var(--text-primary);
        }

        .sidebar-card .sidebar-link i {
            color: var(--accent-blue);
            font-size: 0.8rem;
            width: 16px;
            text-align: center;
        }

        .sidebar-cta {
            text-align: center;
        }

        .sidebar-cta p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: var(--spacing-sm);
            line-height: 1.6;
        }

        .sidebar-cta .btn-sidebar {
            display: block;
            width: 100%;
            padding: 12px 20px;
            border-radius: 999px;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 100%);
            color: #0A0E1A;
            font-weight: 700;
            font-size: 0.88rem;
            text-align: center;
            box-shadow: 0 4px 16px rgba(0, 229, 255, 0.25);
            transition: all var(--transition-fast);
        }

        .sidebar-cta .btn-sidebar:hover {
            box-shadow: 0 6px 24px rgba(0, 229, 255, 0.45);
            transform: translateY(-2px);
            color: #0A0E1A;
        }

        /* ===== FAB ===== */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 999;
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: rgba(10, 14, 26, 0.72);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 0 24px rgba(0, 229, 255, 0.35), 0 4px 16px rgba(0, 0, 0, 0.4);
            transition: all var(--transition-base);
            animation: fab-float 3.5s ease-in-out infinite;
            text-decoration: none;
        }

        .fab-support::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 18px;
            padding: 2px;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 50%, var(--accent-cyan) 100%);
            background-size: 300% 300%;
            animation: fab-border-flow 4s linear infinite;
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            pointer-events: none;
        }

        .fab-support i {
            font-size: 1.4rem;
            color: var(--accent-cyan);
            filter: drop-shadow(0 0 8px var(--accent-glow));
            transition: all var(--transition-fast);
        }

        .fab-support:hover {
            transform: scale(1.1);
            box-shadow: 0 0 36px rgba(0, 229, 255, 0.55), 0 6px 24px rgba(0, 0, 0, 0.5);
        }

        .fab-support:hover i {
            animation: fab-icon-spin 0.5s ease;
        }

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

        .fab-support .fab-notify {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 14px;
            height: 14px;
            background: #FF3B5C;
            border-radius: 50%;
            border: 2px solid #0A0E1A;
            animation: fab-blink 2s ease-in-out infinite;
        }

        @keyframes fab-float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }

        @keyframes fab-border-flow {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        @keyframes fab-icon-spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

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

        /* ===== FOOTER ===== */
        .site-footer {
            background: rgba(8, 12, 22, 0.9);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-top: 1px solid var(--border-glass);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            margin-top: var(--spacing-md);
        }

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

        .footer-brand h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: var(--spacing-sm);
            background: linear-gradient(135deg, #FFFFFF 0%, #B8E6FF 60%, var(--accent-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

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

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.02em;
        }

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

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.85rem;
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col ul li a::before {
            content: '›';
            color: var(--accent-blue);
            font-weight: 700;
            font-size: 1rem;
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
            transform: translateX(3px);
        }

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

        .footer-bottom p {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .article-sidebar {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
            }
            .sidebar-card {
                flex: 1 1 220px;
            }
        }

        @media (max-width: 768px) {
            .nav-wrapper {
                flex-wrap: nowrap;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(10, 14, 26, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border-bottom: 1px solid var(--border-glass);
                padding: var(--spacing-sm);
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 0.92rem;
            }
            .nav-auth {
                display: flex;
                gap: 8px;
            }
            .btn-login,
            .btn-signup {
                padding: 7px 14px;
                font-size: 0.78rem;
            }
            .article-hero {
                padding: 120px 0 32px;
            }
            .article-hero h1 {
                font-size: 1.6rem;
            }
            .article-content {
                padding: var(--spacing-md) var(--spacing-sm);
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .fab-support {
                left: 12px;
                bottom: 80px;
                width: 48px;
                height: 48px;
                border-radius: 14px;
            }
            .fab-support i {
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 var(--spacing-sm);
            }
            .nav-logo span {
                font-size: 0.95rem;
            }
            .nav-logo i {
                font-size: 1.1rem;
            }
            .btn-login {
                padding: 6px 12px;
                font-size: 0.75rem;
            }
            .btn-signup {
                padding: 6px 14px;
                font-size: 0.75rem;
            }
            .article-hero h1 {
                font-size: 1.35rem;
            }
            .article-hero .hero-summary {
                font-size: 0.95rem;
            }
            .article-meta {
                gap: 10px;
            }
            .article-sidebar {
                flex-direction: column;
            }
            .sidebar-card {
                flex: 1 1 auto;
            }
            .article-content h2 {
                font-size: 1.25rem;
            }
            .article-content h3 {
                font-size: 1.05rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary-bg: #08090F;
            --secondary-bg: #0D111E;
            --card-bg: rgba(13, 17, 30, 0.7);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-gold: #FFD700;
            --accent-red: #FF007F;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #94A3B8;
            --border-color: rgba(0, 240, 255, 0.2);
            --border-hover: rgba(0, 240, 255, 0.5);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.3);
            --shadow-glow: 0 0 25px rgba(0, 82, 255, 0.4);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 32px;
            --spacing-lg: 64px;
            --spacing-xl: 96px;
            --font-body: 'Segoe UI', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
        }

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

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

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color 0.3s ease;
        }

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

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

        button, .button {
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            background: rgba(8, 9, 15, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 0;
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 12px 0;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-white);
            text-decoration: none;
            letter-spacing: -0.02em;
        }

        .nav-logo i {
            color: var(--accent-cyan);
            font-size: 1.5rem;
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.6));
        }

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

        .nav-links {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .nav-links a {
            color: var(--text-silver);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 14px;
            border-radius: 20px;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-links a i {
            font-size: 0.9rem;
            color: var(--accent-cyan);
        }

        .nav-links a:hover {
            color: var(--text-white);
            background: rgba(0, 240, 255, 0.1);
        }

        .nav-links a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.15);
            border: 1px solid var(--border-hover);
            box-shadow: var(--shadow-neon);
        }

        .nav-auth {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-login {
            color: var(--text-silver);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px;
            border-radius: 20px;
            transition: all 0.3s ease;
        }

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

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: var(--text-white);
            text-decoration: none;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 10px 22px;
            border-radius: 20px;
            box-shadow: var(--shadow-glow);
            transition: all 0.3s ease;
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.6);
            color: var(--text-white);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
        }

        /* ========== HERO ========== */
        .hero-section {
            background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 50%, #0A0E1A 100%);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.15), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

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

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-hover);
            color: var(--accent-cyan);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
            animation: pulse-border 2s infinite;
        }

        @keyframes pulse-border {
            0%, 100% { box-shadow: 0 0 10px rgba(0, 240, 255, 0.3); }
            50% { box-shadow: 0 0 20px rgba(0, 240, 255, 0.6); }
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -0.03em;
            background: linear-gradient(135deg, var(--text-white) 30%, var(--accent-cyan) 100%);
            -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: 32px;
            max-width: 520px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: var(--text-white);
            text-decoration: none;
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: 24px;
            box-shadow: var(--shadow-glow);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: none;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 45px rgba(0, 240, 255, 0.7);
            color: var(--text-white);
        }

        .btn-outline {
            background: transparent;
            color: var(--accent-cyan);
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 28px;
            border-radius: 24px;
            border: 2px solid var(--border-hover);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-outline:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: var(--shadow-neon);
            color: var(--accent-cyan);
        }

        .hero-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
        }

        .hero-visual img {
            width: 100%;
            height: 400px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .hero-visual:hover img {
            transform: scale(1.05);
        }

        .hero-stats {
            display: flex;
            gap: 24px;
            margin-top: 40px;
            flex-wrap: wrap;
        }

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

        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-cyan);
            text-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
        }

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

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

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

        .section-header {
            text-align: left;
            margin-bottom: 48px;
        }

        .section-tag {
            display: inline-block;
            color: var(--accent-cyan);
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

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

        /* ========== FEATURES GRID ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .feature-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            opacity: 0;
            transition: opacity 0.3s ease;
        }

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

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

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: rgba(0, 240, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }

        .feature-icon i {
            font-size: 1.8rem;
            color: var(--accent-cyan);
        }

        .feature-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-white);
        }

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

        /* ========== STEPS ========== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 24px;
            margin-top: 48px;
        }

        .step-item {
            position: relative;
            padding: 24px;
            background: var(--card-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }

        .step-item:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-neon);
        }

        .step-number {
            font-size: 3rem;
            font-weight: 800;
            color: rgba(0, 240, 255, 0.2);
            margin-bottom: 12px;
        }

        .step-item h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--text-silver);
        }

        /* ========== COMPARISON TABLE ========== */
        .comparison-section {
            background: var(--secondary-bg);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 32px;
            background: var(--card-bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .comparison-table th {
            background: rgba(0, 82, 255, 0.2);
            color: var(--accent-cyan);
            font-weight: 700;
            padding: 16px 20px;
            text-align: left;
            font-size: 0.95rem;
        }

        .comparison-table td {
            padding: 14px 20px;
            color: var(--text-silver);
            font-size: 0.9rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .comparison-table tr:hover td {
            background: rgba(0, 240, 255, 0.03);
        }

        .check-icon {
            color: #32CD32;
        }

        .x-icon {
            color: var(--accent-red);
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
            transition: all 0.3s ease;
        }

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

        .faq-question {
            padding: 20px 24px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-white);
            user-select: none;
        }

        .faq-question i {
            color: var(--accent-cyan);
            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;
            padding: 0 24px;
        }

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

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

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.1), transparent 70%);
            border-radius: 50%;
        }

        .cta-content {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .cta-content h2 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
        }

        .cta-content p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 32px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-white {
            background: var(--text-white);
            color: var(--accent-blue);
            text-decoration: none;
            font-weight: 700;
            font-size: 1rem;
            padding: 16px 36px;
            border-radius: 24px;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-white:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            color: var(--accent-blue);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--primary-bg);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }

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

        .footer-brand h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

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

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }

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

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

        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            text-decoration: none;
            transition: color 0.3s ease;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 24px;
            text-align: center;
        }

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

        /* ========== FAB ========== */
        .fab-container {
            position: fixed;
            left: 20px;
            bottom: 96px;
            z-index: 999;
        }

        .fab-button {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            color: var(--accent-cyan);
            font-size: 1.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
            transition: all 0.3s ease;
            opacity: 0.6;
            animation: fab-breathe 3s infinite;
        }

        @keyframes fab-breathe {
            0%, 100% { opacity: 0.6; box-shadow: 0 0 15px rgba(0, 240, 255, 0.3); }
            50% { opacity: 1; box-shadow: 0 0 30px rgba(0, 240, 255, 0.6); }
        }

        .fab-button:hover {
            transform: scale(1.1);
            opacity: 1;
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.8);
        }

        .fab-button:active {
            transform: scale(0.95);
            border-color: var(--accent-red);
            color: var(--accent-red);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .nav-wrapper {
                flex-wrap: wrap;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 0;
                gap: 8px;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-auth {
                display: none;
                width: 100%;
                padding: 16px 0;
                gap: 12px;
            }
            .nav-auth.open {
                display: flex;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-visual img {
                height: 280px;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .cta-content h2 {
                font-size: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .fab-container {
                left: 12px;
                bottom: 80px;
            }
            .fab-button {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
                gap: 12px;
            }
            .btn-primary, .btn-outline {
                width: 100%;
                justify-content: center;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .stat-number {
                font-size: 1.5rem;
            }
            .comparison-table th,
            .comparison-table td {
                padding: 10px 12px;
                font-size: 0.8rem;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0B1A30;
            --bg-secondary: #0F0C20;
            --bg-card: rgba(15, 20, 40, 0.85);
            --bg-glass: rgba(11, 26, 48, 0.75);
            --accent-neon: #00F0FF;
            --accent-lime: #CCFF00;
            --accent-purple: #8B5CF6;
            --accent-pink: #EC4899;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --text-muted: #6B7280;
            --border-neon: rgba(0, 240, 255, 0.3);
            --border-glass: rgba(255, 255, 255, 0.08);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-neon: 0 0 20px rgba(0, 240, 255, 0.15);
            --shadow-glow: 0 0 30px rgba(204, 255, 0, 0.2);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --spacing-2xl: 96px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.5s ease;
            --font-heading: 'Segoe UI', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-body: 'Segoe UI', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
        }

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

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

        body {
            font-family: var(--font-body);
            background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
            color: var(--text-primary);
            line-height: 1.65;
            min-height: 100vh;
            overflow-x: hidden;
            position: relative;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(ellipse at 20% 20%, rgba(0, 240, 255, 0.05) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 80%, rgba(204, 255, 0, 0.04) 0%, transparent 60%),
                radial-gradient(ellipse at 50% 50%, rgba(139, 92, 246, 0.03) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
        }

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

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-glass);
            transition: var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--text-primary);
            text-decoration: none;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .nav-logo i {
            color: var(--accent-neon);
            font-size: 1.3rem;
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.6));
        }

        .nav-logo span {
            background: linear-gradient(135deg, #FFFFFF 0%, #A6ACAF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-logo:hover {
            opacity: 0.9;
            transform: translateY(-1px);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
        }

        .nav-links a {
            display: flex;
            align-items: center;
            gap: 6px;
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 20px;
            transition: var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .nav-links a i {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: var(--transition-fast);
        }

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

        .nav-links a:hover i {
            color: var(--accent-neon);
        }

        .nav-links a.active {
            color: var(--accent-neon);
            background: rgba(0, 240, 255, 0.12);
            font-weight: 600;
        }

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

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-neon);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(0, 240, 255, 0.8);
        }

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

        .btn-login {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-primary);
            text-decoration: none;
            border: 1px solid var(--border-glass);
            transition: var(--transition-fast);
            white-space: nowrap;
        }

        .btn-login:hover {
            border-color: var(--accent-neon);
            color: var(--accent-neon);
            background: rgba(0, 240, 255, 0.05);
        }

        .btn-signup {
            display: inline-flex;
            align-items: center;
            padding: 8px 20px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--bg-secondary);
            background: linear-gradient(135deg, var(--accent-neon) 0%, var(--accent-lime) 100%);
            text-decoration: none;
            transition: var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.5);
            color: var(--bg-secondary);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border-glass);
            border-radius: 8px;
            color: var(--text-primary);
            font-size: 1.2rem;
            padding: 8px 12px;
            cursor: pointer;
            transition: var(--transition-fast);
        }

        .mobile-toggle:hover {
            border-color: var(--accent-neon);
            color: var(--accent-neon);
        }

        /* Page Header / Banner */
        .page-banner {
            padding: 140px 0 60px;
            position: relative;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(180deg, transparent 0%, var(--bg-primary) 100%);
            z-index: 0;
        }

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

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

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

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

        .breadcrumb i {
            font-size: 0.7rem;
            color: var(--text-muted);
        }

        .page-banner h1 {
            font-family: var(--font-heading);
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: var(--spacing-sm);
            background: linear-gradient(135deg, #FFFFFF 0%, var(--accent-neon) 50%, var(--accent-lime) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            max-width: 800px;
        }

        .page-banner .banner-sub {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 600px;
            line-height: 1.7;
        }

        /* Main Content Sections */
        .content-section {
            padding: var(--spacing-xl) 0;
        }

        .content-section.alt-bg {
            background: rgba(15, 12, 32, 0.5);
            border-top: 1px solid var(--border-glass);
            border-bottom: 1px solid var(--border-glass);
        }

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

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 20px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-neon);
            color: var(--accent-neon);
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: var(--spacing-sm);
        }

        .section-header h2 {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: var(--spacing-sm);
        }

        .section-header p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 700px;
            line-height: 1.7;
        }

        /* Hero Bento Grid */
        .bento-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            grid-template-rows: auto auto;
            gap: var(--spacing-md);
            margin-top: var(--spacing-lg);
        }

        .bento-main {
            grid-row: 1 / span 2;
            background: var(--bg-glass);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            position: relative;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .bento-main::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -30%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .bento-main:hover {
            border-color: var(--border-neon);
            box-shadow: var(--shadow-neon);
        }

        .bento-main .bento-icon {
            font-size: 2.5rem;
            color: var(--accent-neon);
            margin-bottom: var(--spacing-md);
            filter: drop-shadow(0 0 15px rgba(0, 240, 255, 0.5));
        }

        .bento-main h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: var(--spacing-sm);
            color: var(--text-primary);
        }

        .bento-main p {
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: var(--spacing-sm);
        }

        .bento-small {
            background: var(--bg-glass);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .bento-small:hover {
            border-color: var(--border-neon);
            box-shadow: var(--shadow-neon);
            transform: translateY(-2px);
        }

        .bento-small .bento-icon {
            font-size: 1.8rem;
            color: var(--accent-lime);
            margin-bottom: var(--spacing-xs);
        }

        .bento-small h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .bento-small p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .bento-cta {
            grid-column: 1 / -1;
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.15) 0%, rgba(204, 255, 0, 0.1) 100%);
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }

        .bento-cta p {
            color: var(--text-primary);
            font-weight: 500;
            font-size: 1.05rem;
        }

        /* Steps Timeline */
        .steps-timeline {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
            position: relative;
            padding-left: 30px;
        }

        .steps-timeline::before {
            content: '';
            position: absolute;
            left: 12px;
            top: 10px;
            bottom: 10px;
            width: 2px;
            background: linear-gradient(180deg, var(--accent-neon) 0%, var(--accent-lime) 100%);
            border-radius: 2px;
            opacity: 0.4;
        }

        .step-item {
            position: relative;
            background: var(--bg-glass);
            backdrop-filter: blur(15px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            transition: var(--transition-base);
        }

        .step-item:hover {
            border-color: var(--border-neon);
            box-shadow: var(--shadow-neon);
        }

        .step-item::before {
            content: '';
            position: absolute;
            left: -24px;
            top: 24px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent-neon);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.8);
            border: 2px solid var(--bg-primary);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-neon) 0%, var(--accent-lime) 100%);
            color: var(--bg-secondary);
            font-weight: 700;
            font-size: 0.9rem;
            margin-bottom: var(--spacing-xs);
        }

        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .step-item p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        /* Feature Grid */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--spacing-md);
        }

        .feature-card {
            background: var(--bg-glass);
            backdrop-filter: blur(15px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .feature-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-neon) 0%, var(--accent-lime) 100%);
            opacity: 0;
            transition: var(--transition-base);
        }

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

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

        .feature-icon {
            font-size: 2rem;
            color: var(--accent-neon);
            margin-bottom: var(--spacing-sm);
            filter: drop-shadow(0 0 10px rgba(0, 240, 255, 0.4));
        }

        .feature-card h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .feature-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.65;
        }

        /* FAQ Section */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .faq-item {
            background: var(--bg-glass);
            backdrop-filter: blur(15px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-base);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--spacing-md);
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            gap: var(--spacing-sm);
            user-select: none;
            transition: var(--transition-fast);
        }

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

        .faq-question i {
            color: var(--accent-neon);
            transition: var(--transition-base);
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow);
            padding: 0 var(--spacing-md);
        }

        .faq-item.open .faq-answer {
            max-height: 500px;
            padding-bottom: var(--spacing-md);
        }

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

        /* CTA Section */
        .cta-section {
            padding: var(--spacing-xl) 0;
            text-align: center;
            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, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-box {
            background: var(--bg-glass);
            backdrop-filter: blur(25px);
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-xl);
            padding: var(--spacing-xl);
            position: relative;
            box-shadow: var(--shadow-neon);
        }

        .cta-box h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: var(--spacing-sm);
            background: linear-gradient(135deg, #FFFFFF 0%, var(--accent-neon) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .cta-box p {
            color: var(--text-secondary);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto var(--spacing-lg);
            line-height: 1.7;
        }

        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 28px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--bg-secondary);
            background: linear-gradient(135deg, var(--accent-neon) 0%, var(--accent-lime) 100%);
            text-decoration: none;
            transition: var(--transition-base);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.4);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.6);
            color: var(--bg-secondary);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            border-radius: 28px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-glass);
            text-decoration: none;
            transition: var(--transition-base);
        }

        .btn-secondary:hover {
            border-color: var(--accent-neon);
            color: var(--accent-neon);
            background: rgba(0, 240, 255, 0.05);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-glass);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            position: relative;
            z-index: 1;
        }

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

        .footer-brand h3 {
            font-family: var(--font-heading);
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: var(--spacing-sm);
            background: linear-gradient(135deg, #FFFFFF 0%, var(--accent-neon) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

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

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: var(--spacing-sm);
            color: var(--text-primary);
        }

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

        .footer-col ul li {
            margin-bottom: 8px;
        }

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

        .footer-col ul li a:hover {
            color: var(--accent-neon);
            padding-left: 4px;
        }

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

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

        /* FAB */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 90;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(15px);
            -webkit-backdrop-filter: blur(15px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(15, 12, 32, 0.85), rgba(15, 12, 32, 0.85)), linear-gradient(135deg, var(--accent-neon) 0%, var(--accent-lime) 100%);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-neon);
            font-size: 1.3rem;
            cursor: pointer;
            transition: var(--transition-base);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
            opacity: 0.7;
            animation: fabFloat 3s ease-in-out infinite;
            text-decoration: none;
        }

        .fab-support:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.6);
        }

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

        @keyframes fabFloat {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
            }
            
            .page-banner h1 {
                font-size: 2.2rem;
            }
            
            .bento-grid {
                grid-template-columns: 1fr;
            }
            
            .bento-main {
                grid-row: auto;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(15, 12, 32, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: var(--spacing-sm);
                border-bottom: 1px solid var(--border-glass);
                box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
            }
            
            .nav-links.open {
                display: flex;
            }
            
            .nav-links a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }
            
            .mobile-toggle {
                display: block;
            }
            
            .nav-auth {
                display: none;
            }
            
            .page-banner {
                padding: 120px 0 40px;
            }
            
            .page-banner h1 {
                font-size: 1.8rem;
            }
            
            .section-header h2 {
                font-size: 1.6rem;
            }
            
            .cta-box h2 {
                font-size: 1.5rem;
            }
            
            .bento-cta {
                flex-direction: column;
                text-align: center;
            }
            
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            
            .fab-support {
                width: 48px;
                height: 48px;
                font-size: 1.1rem;
                bottom: 80px;
                left: 12px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 var(--spacing-sm);
            }
            
            .page-banner h1 {
                font-size: 1.5rem;
            }
            
            .section-header h2 {
                font-size: 1.4rem;
            }
            
            .bento-main {
                padding: var(--spacing-md);
            }
            
            .bento-small {
                padding: var(--spacing-sm);
            }
            
            .cta-box {
                padding: var(--spacing-md);
            }
            
            .btn-primary, .btn-secondary {
                padding: 12px 20px;
                font-size: 0.9rem;
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.85);
            --bg-glass: rgba(13, 17, 30, 0.6);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-hot-pink: #FF007F;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-subtle: rgba(0, 240, 255, 0.15);
            --border-glow: rgba(0, 240, 255, 0.4);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-blue: 0 0 20px rgba(0, 82, 255, 0.4);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --spacing-xxl: 80px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-primary: 'Segoe UI', 'Inter', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        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);
        }

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

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

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

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            white-space: nowrap;
            letter-spacing: -0.01em;
        }

        .nav-logo i {
            color: var(--accent-cyan);
            font-size: 1.3rem;
        }

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

        .mobile-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
            font-size: 1.2rem;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .mobile-toggle:hover {
            border-color: var(--border-glow);
            color: var(--accent-cyan);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
        }

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

        .nav-links a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.12);
            box-shadow: inset 0 0 0 1px var(--border-glow);
        }

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

        .btn-login {
            padding: 8px 16px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
            background: none;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
        }

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

        .btn-signup {
            padding: 8px 20px;
            font-size: 0.85rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-blue);
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-signup:hover {
            transform: translateY(-1px);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.6);
            color: #fff;
        }

        /* Hero */
        .hero {
            padding: 120px 0 60px;
            position: relative;
            background: radial-gradient(ellipse at 30% 20%, rgba(0, 82, 255, 0.2) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 80%, rgba(0, 240, 255, 0.08) 0%, transparent 50%),
                        var(--bg-primary);
            min-height: 600px;
            display: flex;
            align-items: center;
        }

        .hero-content {
            max-width: 640px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-glow);
            border-radius: 50px;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .hero-badge i {
            font-size: 0.9rem;
        }

        .hero h1 {
            font-size: clamp(2rem, 5vw, 3rem);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
            color: var(--text-primary);
        }

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

        .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 30px;
            line-height: 1.7;
            max-width: 540px;
        }

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

        .btn-primary-glow {
            padding: 14px 28px;
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-glow);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-primary-glow:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
            color: #fff;
        }

        .btn-outline-glow {
            padding: 14px 24px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--accent-cyan);
            background: transparent;
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-outline-glow:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: var(--shadow-glow);
            color: var(--accent-cyan);
        }

        .hero-stats {
            display: flex;
            gap: 30px;
            margin-top: 36px;
            flex-wrap: wrap;
        }

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

        .hero-stat-item .stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-cyan);
            letter-spacing: -0.01em;
        }

        .hero-stat-item .stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 2px;
        }

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

        .hero-visual img {
            max-width: 480px;
            width: 100%;
            border-radius: var(--radius-lg);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(0, 240, 255, 0.15);
            border: 1px solid var(--border-subtle);
        }

        .hero-visual::before {
            content: '';
            position: absolute;
            top: -20px;
            right: -20px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.2) 0%, transparent 70%);
            border-radius: 50%;
            z-index: 0;
            pointer-events: none;
        }

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

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

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

        .section-header h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.2rem);
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 12px;
            color: var(--text-primary);
            line-height: 1.3;
        }

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

        /* Content sections */
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .content-text h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .content-text p {
            color: var(--text-secondary);
            margin-bottom: 16px;
            line-height: 1.7;
        }

        .content-list {
            list-style: none;
            padding: 0;
            margin: 20px 0;
        }

        .content-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .content-list li i {
            color: var(--accent-cyan);
            font-size: 1rem;
            margin-top: 4px;
            flex-shrink: 0;
        }

        .content-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
            border: 1px solid var(--border-subtle);
        }

        .content-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* Tips grid */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: var(--spacing-md);
        }

        .tip-card {
            background: var(--bg-glass);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

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

        .tip-card:hover {
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3), 0 0 20px rgba(0, 240, 255, 0.1);
        }

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

        .tip-icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-subtle);
            color: var(--accent-cyan);
            font-size: 1.4rem;
            margin-bottom: 16px;
        }

        .tip-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

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

        /* Steps */
        .steps-container {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-top: var(--spacing-md);
        }

        .step-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding: 20px 24px;
            background: var(--bg-glass);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            transition: var(--transition);
        }

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

        .step-number {
            width: 40px;
            height: 40px;
            min-width: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            border-radius: 50%;
            flex-shrink: 0;
        }

        .step-content h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-primary);
        }

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

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            margin-bottom: 12px;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-glass);
            transition: var(--transition);
        }

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

        .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1rem;
            font-weight: 600;
            text-align: left;
            cursor: pointer;
            transition: var(--transition);
            gap: 16px;
        }

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

        .faq-question i {
            color: var(--accent-cyan);
            font-size: 0.9rem;
            transition: var(--transition);
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
            margin: 0;
        }

        /* CTA */
        .cta-section {
            padding: var(--spacing-xl) 0;
            background: radial-gradient(ellipse at 50% 50%, rgba(0, 82, 255, 0.25) 0%, transparent 60%),
                        radial-gradient(ellipse at 80% 20%, rgba(0, 240, 255, 0.1) 0%, transparent 40%),
                        var(--bg-primary);
            text-align: center;
        }

        .cta-box {
            max-width: 680px;
            margin: 0 auto;
            padding: 48px 40px;
            background: var(--bg-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), 0 0 30px rgba(0, 240, 255, 0.1);
        }

        .cta-box h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .cta-box p {
            color: var(--text-secondary);
            font-size: 1rem;
            margin-bottom: 28px;
            line-height: 1.7;
        }

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

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

        .footer-brand h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 360px;
        }

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

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

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.85rem;
            transition: var(--transition);
        }

        .footer-col ul li 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;
            line-height: 1.6;
        }

        /* FAB - Cyber Neon Style */
        .fab-neon {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 90;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), linear-gradient(135deg, var(--accent-cyan), var(--accent-hot-pink));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            cursor: pointer;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            opacity: 0.6;
            transition: var(--transition);
            animation: fabBreathing 3s ease-in-out infinite;
        }

        .fab-neon:hover {
            opacity: 1;
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.8), 0 0 50px rgba(255, 0, 127, 0.4);
            transform: scale(1.1);
            animation: none;
            color: #fff;
        }

        .fab-neon:active {
            transform: scale(0.95);
            box-shadow: 0 0 40px rgba(255, 0, 127, 0.8);
            color: var(--accent-hot-pink);
        }

        @keyframes fabBreathing {
            0%, 100% { opacity: 0.6; box-shadow: 0 0 15px rgba(0, 240, 255, 0.5); }
            50% { opacity: 0.85; box-shadow: 0 0 25px rgba(0, 240, 255, 0.7); }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .content-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .hero {
                padding: 100px 0 50px;
                min-height: auto;
            }
            .hero-visual {
                order: -1;
            }
            .hero-visual img {
                max-width: 400px;
            }
            .tips-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            .mobile-toggle {
                display: block;
            }
            .nav-links {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(16px);
                border-bottom: 1px solid var(--border-subtle);
                padding: 16px 20px;
                gap: 4px;
                display: none;
                align-items: stretch;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 12px 16px;
                width: 100%;
                font-size: 0.9rem;
            }
            .nav-auth {
                display: flex !important;
                gap: 8px;
            }
            .btn-login, .btn-signup {
                padding: 7px 14px;
                font-size: 0.8rem;
            }
            .nav-wrapper {
                flex-wrap: wrap;
                gap: 10px;
            }
            .nav-logo {
                font-size: 1rem;
            }
            .nav-auth {
                margin-left: auto;
            }
            .hero {
                padding: 90px 0 40px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .hero-stats {
                gap: 20px;
            }
            .hero-stat-item .stat-number {
                font-size: 1.4rem;
            }
            .tips-grid {
                grid-template-columns: 1fr;
            }
            .cta-box {
                padding: 32px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .section {
                padding: 48px 0;
            }
            .fab-neon {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 12px;
                bottom: 80px;
            }
        }

        @media (max-width: 520px) {
            .nav-logo span {
                font-size: 0.85rem;
            }
            .btn-login, .btn-signup {
                padding: 6px 10px;
                font-size: 0.75rem;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .btn-primary-glow, .btn-outline-glow {
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 12px;
            }
            .step-item {
                padding: 16px;
                gap: 14px;
            }
            .step-number {
                width: 32px;
                height: 32px;
                min-width: 32px;
                font-size: 0.9rem;
            }
        }