/* roulang page: index */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: #111827;
            --bg-card: rgba(17, 25, 40, 0.75);
            --accent-cyan: #00E5FF;
            --accent-blue: #0052FF;
            --accent-purple: #7C3AED;
            --text-primary: #F1F5F9;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-subtle: rgba(148, 163, 184, 0.12);
            --border-glow: rgba(0, 229, 255, 0.35);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 229, 255, 0.3);
            --radius-sm: 0.75rem;
            --radius-md: 1rem;
            --radius-lg: 1.5rem;
            --radius-xl: 2rem;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: rgba(10, 14, 23, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background var(--transition-smooth);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 2rem;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-weight: 800;
            font-size: 1.25rem;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }

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

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 0 14px rgba(0, 229, 255, 0.25);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 0.55rem 1.15rem;
            border-radius: var(--radius-md);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }

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

        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .btn-login {
            padding: 0.55rem 1.25rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
        }

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

        .btn-signup {
            padding: 0.55rem 1.25rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.9rem;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            box-shadow: 0 4px 18px rgba(0, 229, 255, 0.25);
            transition: all var(--transition-fast);
        }

        .btn-signup:hover {
            box-shadow: 0 6px 24px rgba(0, 229, 255, 0.4);
            transform: translateY(-1px);
        }

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

        .mobile-toggle {
            display: none;
            background: transparent;
            color: var(--text-primary);
            font-size: 1.6rem;
            padding: 0.4rem;
            border-radius: var(--radius-sm);
        }

        /* Hero Section */
        .hero-section {
            padding: 8rem 0 4rem;
            position: relative;
            overflow: hidden;
            background: linear-gradient(180deg, rgba(0, 82, 255, 0.08) 0%, transparent 60%),
                url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            min-height: 85vh;
            display: flex;
            align-items: center;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(0, 229, 255, 0.1) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 60%, rgba(124, 58, 237, 0.08) 0%, transparent 50%);
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            gap: 3rem;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-content h1 {
            font-size: clamp(2.4rem, 5vw, 3.6rem);
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -0.03em;
            margin-bottom: 1.5rem;
            background: linear-gradient(135deg, #FFFFFF 0%, #CBD5E1 70%, var(--accent-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-content .hero-desc {
            font-size: 1.15rem;
            line-height: 1.7;
            color: var(--text-secondary);
            margin-bottom: 2rem;
            max-width: 520px;
        }

        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .badge-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-xl);
            padding: 0.5rem 1.1rem;
            font-size: 0.9rem;
            color: var(--text-primary);
            backdrop-filter: blur(8px);
        }

        .badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-cyan);
            box-shadow: 0 0 8px var(--accent-cyan);
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .btn-primary {
            padding: 0.85rem 2rem;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1rem;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            box-shadow: 0 4px 22px rgba(0, 229, 255, 0.3);
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn-primary:hover {
            box-shadow: 0 8px 30px rgba(0, 229, 255, 0.45);
            transform: translateY(-2px);
        }

        .btn-secondary {
            padding: 0.85rem 2rem;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1rem;
            background: transparent;
            color: var(--text-primary);
            border: 1.5px solid var(--border-subtle);
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn-secondary:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.15);
        }

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

        .hero-card-stack {
            background: var(--bg-card);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 2rem;
            box-shadow: var(--shadow-glow), var(--shadow-card);
            text-align: center;
        }

        .hero-card-stack img {
            border-radius: var(--radius-lg);
            margin-bottom: 1.25rem;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
        }

        .hero-card-stack .stack-label {
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text-primary);
            margin-bottom: 0.35rem;
        }

        .hero-card-stack .stack-meta {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* Section Commons */
        section {
            padding: 4.5rem 0;
        }

        .section-header {
            margin-bottom: 3rem;
        }

        .section-header h2 {
            font-size: clamp(1.8rem, 3.5vw, 2.4rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
        }

        .section-header p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.65;
        }

        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 0.75rem;
        }

        /* Value Cards */
        .value-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.75rem;
        }

        .value-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2rem 1.75rem;
            transition: all var(--transition-smooth);
        }

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

        .value-icon {
            width: 50px;
            height: 50px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, rgba(0, 229, 255, 0.15), rgba(0, 82, 255, 0.15));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 1.25rem;
        }

        .value-card h3 {
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 0.6rem;
            color: var(--text-primary);
        }

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

        /* Testimonial Bubbles */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
        }

        .testimonial-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 1.75rem;
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .testimonial-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 0 18px rgba(0, 229, 255, 0.15);
        }

        .testimonial-quote {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.65;
            font-style: italic;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .author-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            color: #fff;
            flex-shrink: 0;
        }

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

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

        /* Guarantee Bar */
        .guarantee-bar {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
            padding: 2.5rem 0;
        }

        .guarantee-list {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 2.5rem;
            list-style: none;
        }

        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-weight: 600;
            color: var(--text-primary);
            font-size: 0.95rem;
        }

        .guarantee-icon {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        /* Blog / News List */
        .blog-section {
            background: var(--bg-secondary);
        }

        .blog-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2.5rem;
        }

        .blog-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .blog-list-item {
            display: flex;
            gap: 1.25rem;
            padding: 1.25rem;
            border-radius: var(--radius-md);
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
            align-items: flex-start;
        }

        .blog-list-item:hover {
            border-color: var(--border-glow);
            box-shadow: 0 4px 16px rgba(0, 229, 255, 0.1);
        }

        .blog-list-content {
            flex: 1;
        }

        .blog-list-content .blog-cat {
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            color: var(--accent-cyan);
            margin-bottom: 0.4rem;
        }

        .blog-list-content h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.4rem;
            line-height: 1.4;
        }

        .blog-list-content h3 a {
            color: inherit;
        }

        .blog-list-content h3 a:hover {
            color: var(--accent-cyan);
        }

        .blog-list-content .blog-excerpt {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.55;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .blog-list-content .blog-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-top: 0.5rem;
        }

        .blog-sidebar {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 1.75rem;
            height: fit-content;
            position: sticky;
            top: 100px;
        }

        .blog-sidebar h3 {
            font-weight: 700;
            font-size: 1.15rem;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .blog-sidebar ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

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

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

        .blog-sidebar li a::before {
            content: '▹';
            color: var(--accent-cyan);
        }

        .no-posts {
            color: var(--text-muted);
            font-style: italic;
            padding: 2rem;
            text-align: center;
        }

        /* CTA Banner */
        .cta-banner {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.12), rgba(0, 229, 255, 0.06));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 3rem 2.5rem;
            text-align: center;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
        }

        .cta-banner h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .cta-banner p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 2rem;
        }

        .cta-banner .btn-primary {
            font-size: 1.1rem;
            padding: 1rem 2.5rem;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 3rem 0 2rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }

        .footer-brand .logo-link {
            font-size: 1.1rem;
            margin-bottom: 0.75rem;
        }

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

        .footer-col h4 {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-primary);
            margin-bottom: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.03em;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

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

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

        .footer-bottom {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .footer-trust {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1.5rem;
            margin-top: 1rem;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* FAB */
        .fab-floating {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            border: 1.5px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            box-shadow: 0 0 22px rgba(0, 229, 255, 0.35);
            cursor: pointer;
            transition: all var(--transition-smooth);
            animation: floatPulse 3s ease-in-out infinite;
        }

        .fab-floating:hover {
            box-shadow: 0 0 32px rgba(0, 229, 255, 0.55);
            transform: scale(1.08);
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .hero-content .hero-desc {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-badges {
                justify-content: center;
            }
            .hero-cta-group {
                justify-content: center;
            }
            .hero-visual {
                order: -1;
            }
            .hero-card-stack {
                max-width: 400px;
                margin: 0 auto;
            }
            .blog-grid {
                grid-template-columns: 1fr;
            }
            .blog-sidebar {
                position: static;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(10, 14, 23, 0.95);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 1rem;
                border-bottom: 1px solid var(--border-subtle);
            }
            .nav-links.open {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            section {
                padding: 3rem 0;
            }
            .hero-section {
                padding-top: 6rem;
                min-height: auto;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .guarantee-list {
                flex-direction: column;
                align-items: center;
                gap: 1.25rem;
            }
        }

        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 2rem;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .header-inner {
                gap: 1rem;
            }
            .logo-link {
                font-size: 1rem;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: #111827;
            --bg-card: rgba(17, 25, 40, 0.75);
            --accent-cyan: #00E5FF;
            --accent-blue: #0052FF;
            --accent-purple: #7C3AED;
            --text-primary: #F1F5F9;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-subtle: rgba(148, 163, 184, 0.12);
            --border-glow: rgba(0, 229, 255, 0.35);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 229, 255, 0.3);
            --radius-sm: 0.75rem;
            --radius-md: 1rem;
            --radius-lg: 1.5rem;
            --radius-xl: 2rem;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        .container-narrow {
            max-width: 820px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: rgba(10, 14, 23, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background var(--transition-smooth);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 2rem;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-weight: 800;
            font-size: 1.25rem;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }

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

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 0 14px rgba(0, 229, 255, 0.25);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 0.55rem 1.15rem;
            border-radius: var(--radius-md);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }

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

        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .btn-login {
            padding: 0.55rem 1.25rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
        }

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

        .btn-signup {
            padding: 0.55rem 1.25rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.9rem;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            box-shadow: 0 4px 18px rgba(0, 229, 255, 0.25);
            transition: all var(--transition-fast);
        }

        .btn-signup:hover {
            box-shadow: 0 6px 24px rgba(0, 229, 255, 0.4);
            transform: translateY(-1px);
        }

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

        .mobile-toggle {
            display: none;
            background: transparent;
            color: var(--text-primary);
            font-size: 1.6rem;
            padding: 0.4rem;
            border-radius: var(--radius-sm);
        }

        /* Breadcrumb */
        .breadcrumb-nav {
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-subtle);
            padding: 0.75rem 0;
        }

        .breadcrumb-list {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            list-style: none;
            flex-wrap: wrap;
            font-size: 0.875rem;
            color: var(--text-muted);
        }

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

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

        .breadcrumb-list .separator {
            color: var(--text-muted);
            font-size: 0.75rem;
        }

        /* Article Content Area */
        .article-main {
            padding: 7.5rem 0 4rem;
        }

        .article-header {
            margin-bottom: 2.5rem;
            padding: 2.5rem 0 0;
        }

        .article-category {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: rgba(0, 229, 255, 0.12);
            color: var(--accent-cyan);
            padding: 0.4rem 1rem;
            border-radius: var(--radius-sm);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1.25rem;
            border: 1px solid rgba(0, 229, 255, 0.2);
        }

        .article-title {
            font-size: 2.5rem;
            font-weight: 900;
            line-height: 1.25;
            letter-spacing: -0.03em;
            color: var(--text-primary);
            margin-bottom: 1rem;
            background: linear-gradient(135deg, #fff, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: var(--text-muted);
            padding-bottom: 1.5rem;
            border-bottom: 1px solid var(--border-subtle);
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
        }

        .article-meta i {
            color: var(--accent-cyan);
            font-size: 0.85rem;
        }

        /* Article Body */
        .article-body {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .article-body h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-glow);
            display: inline-block;
        }

        .article-body h2:first-child {
            margin-top: 0;
        }

        .article-body h3 {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin: 1.75rem 0 0.75rem;
        }

        .article-body p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin-bottom: 1.25rem;
            line-height: 1.75;
        }

        .article-body ul,
        .article-body ol {
            margin: 1rem 0 1.5rem 1.5rem;
            color: var(--text-secondary);
        }

        .article-body li {
            margin-bottom: 0.5rem;
            line-height: 1.7;
            font-size: 1.05rem;
        }

        .article-body img {
            border-radius: var(--radius-md);
            margin: 1.5rem 0;
            box-shadow: var(--shadow-card);
            width: 100%;
            height: auto;
        }

        .article-body blockquote {
            background: rgba(0, 229, 255, 0.06);
            border-left: 4px solid var(--accent-cyan);
            padding: 1rem 1.5rem;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 1.5rem 0;
            color: var(--text-secondary);
            font-style: italic;
            font-size: 1.05rem;
        }

        .article-cover {
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 2rem;
            box-shadow: var(--shadow-glow);
            border: 1px solid var(--border-subtle);
        }

        /* Not Found State */
        .not-found {
            text-align: left;
            padding: 3rem 2rem;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
        }

        .not-found-icon {
            font-size: 3.5rem;
            color: var(--accent-cyan);
            margin-bottom: 1.5rem;
        }

        .not-found h2 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .not-found p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
        }

        .btn-back-home {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            padding: 0.75rem 1.75rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 1rem;
            box-shadow: 0 4px 18px rgba(0, 229, 255, 0.3);
            transition: all var(--transition-smooth);
        }

        .btn-back-home:hover {
            box-shadow: 0 6px 28px rgba(0, 229, 255, 0.5);
            transform: translateY(-2px);
        }

        /* Related Section */
        .related-section {
            margin-top: 3rem;
            padding: 2.5rem;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(12px);
        }

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

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .related-card {
            background: var(--bg-secondary);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }

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

        .related-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }

        .related-card-body {
            padding: 1.25rem;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .related-card-body h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .related-card-body h4 a:hover {
            color: var(--accent-cyan);
        }

        .related-card-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: auto;
        }

        /* FAB */
        .fab-container {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 45;
        }

        .fab-btn {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(10, 14, 23, 0.7);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            box-shadow: 0 0 24px rgba(0, 229, 255, 0.35), 0 4px 12px rgba(0, 0, 0, 0.5);
            transition: all var(--transition-smooth);
            cursor: pointer;
            animation: fabPulse 3s ease-in-out infinite;
        }

        .fab-btn::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            z-index: -1;
            opacity: 0.7;
        }

        .fab-btn:hover {
            transform: scale(1.1);
            box-shadow: 0 0 36px rgba(0, 229, 255, 0.55), 0 8px 20px rgba(0, 0, 0, 0.6);
            color: #fff;
        }

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

        @keyframes fabPulse {
            0%, 100% { box-shadow: 0 0 24px rgba(0, 229, 255, 0.35); }
            50% { box-shadow: 0 0 38px rgba(0, 229, 255, 0.6); }
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 3.5rem 0 2rem;
            margin-top: 4rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2rem;
        }

        .footer-brand .logo-link {
            margin-bottom: 0.75rem;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
            margin-top: 0.75rem;
        }

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

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

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

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

        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .footer-trust {
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .article-title {
                font-size: 2rem;
            }
        }

        @media (max-width: 768px) {
            .mobile-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(10, 14, 23, 0.95);
                flex-direction: column;
                padding: 1rem;
                border-bottom: 1px solid var(--border-subtle);
                gap: 0.5rem;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                width: 100%;
                padding: 0.75rem 1rem;
            }
            .header-actions {
                gap: 0.5rem;
            }
            .btn-login, .btn-signup {
                padding: 0.5rem 1rem;
                font-size: 0.85rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .article-body {
                padding: 1.5rem;
            }
            .article-title {
                font-size: 1.75rem;
            }
            .article-meta {
                gap: 1rem;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 1rem;
            }
            .container-narrow {
                padding: 0 1rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .article-title {
                font-size: 1.45rem;
            }
            .article-body h2 {
                font-size: 1.35rem;
            }
            .fab-container {
                left: 0.75rem;
                bottom: 5rem;
            }
            .fab-btn {
                width: 48px;
                height: 48px;
                font-size: 1.25rem;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: #111827;
            --bg-card: rgba(17, 25, 40, 0.75);
            --accent-cyan: #00E5FF;
            --accent-blue: #0052FF;
            --accent-purple: #7C3AED;
            --text-primary: #F1F5F9;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-subtle: rgba(148, 163, 184, 0.12);
            --border-glow: rgba(0, 229, 255, 0.35);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 229, 255, 0.3);
            --radius-sm: 0.75rem;
            --radius-md: 1rem;
            --radius-lg: 1.5rem;
            --radius-xl: 2rem;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: rgba(10, 14, 23, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background var(--transition-smooth);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 2rem;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-weight: 800;
            font-size: 1.25rem;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }

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

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 0 14px rgba(0, 229, 255, 0.25);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 0.55rem 1.15rem;
            border-radius: var(--radius-md);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }

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

        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .btn-login {
            padding: 0.55rem 1.25rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
        }

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

        .btn-signup {
            padding: 0.55rem 1.25rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.9rem;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            box-shadow: 0 4px 18px rgba(0, 229, 255, 0.25);
            transition: all var(--transition-fast);
        }

        .btn-signup:hover {
            box-shadow: 0 6px 24px rgba(0, 229, 255, 0.4);
            transform: translateY(-1px);
        }

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

        .mobile-toggle {
            display: none;
            background: transparent;
            color: var(--text-primary);
            font-size: 1.6rem;
            padding: 0.4rem;
            border-radius: var(--radius-sm);
        }

        /* Category Hero Section - Whitepaper style */
        .category-hero {
            padding: 8rem 0 4rem;
            background: linear-gradient(180deg, rgba(0, 82, 255, 0.08) 0%, transparent 60%),
                url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            min-height: 70vh;
            display: flex;
            align-items: center;
            position: relative;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 0%, rgba(0, 229, 255, 0.06) 0%, transparent 60%);
            pointer-events: none;
        }

        .hero-guid-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-guid-cover {
            background: var(--bg-card);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            border: 1px solid var(--border-glow);
            box-shadow: var(--shadow-glow), var(--shadow-card);
        }

        .guid-cover-badge {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
            color: #fff;
            padding: 0.35rem 1rem;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .guid-cover-image {
            width: 100%;
            aspect-ratio: 4/3;
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 1.5rem;
            background: var(--bg-secondary);
            box-shadow: var(--shadow-card);
        }

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

        .guid-toc {
            list-style: none;
        }

        .guid-toc li {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.7rem 0;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-subtle);
            font-size: 0.9rem;
        }

        .guid-toc li:last-child {
            border-bottom: none;
        }

        .guid-toc li::before {
            content: '';
            width: 6px;
            height: 6px;
            background: var(--accent-cyan);
            border-radius: 50%;
            flex-shrink: 0;
        }

        .hero-guid-content h1 {
            font-size: 2.75rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 1.25rem;
            background: linear-gradient(135deg, #fff, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-guid-content .lead {
            font-size: 1.15rem;
            color: var(--text-secondary);
            margin-bottom: 2rem;
            line-height: 1.7;
        }

        .hero-download-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 1.75rem;
            backdrop-filter: blur(10px);
        }

        .hero-download-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }

        .hero-download-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 1.25rem;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.75rem;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 700;
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 20px rgba(0, 229, 255, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 229, 255, 0.45);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.75rem;
            background: transparent;
            color: var(--accent-cyan);
            font-weight: 600;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-glow);
            font-size: 0.95rem;
            transition: all var(--transition-smooth);
        }

        .btn-secondary:hover {
            background: rgba(0, 229, 255, 0.08);
            border-color: var(--accent-cyan);
        }

        /* Tips Grid Section */
        .tips-section {
            padding: 5rem 0;
        }

        .section-label {
            display: inline-block;
            background: rgba(0, 229, 255, 0.12);
            color: var(--accent-cyan);
            padding: 0.35rem 1rem;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1rem;
            letter-spacing: 0.02em;
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }

        .section-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 3rem;
            max-width: 700px;
            line-height: 1.7;
        }

        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: 1.75rem;
        }

        .tip-card {
            background: var(--bg-card);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2rem;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .tip-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition-smooth);
        }

        .tip-card:hover::before {
            transform: scaleX(1);
        }

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

        .tip-number {
            font-size: 2.5rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
            margin-bottom: 0.5rem;
        }

        .tip-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
        }

        .tip-card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 1.25rem;
        }

        .tip-meta {
            display: flex;
            gap: 1rem;
            font-size: 0.8rem;
            color: var(--text-muted);
            align-items: center;
        }

        .tip-tag {
            background: rgba(124, 58, 237, 0.2);
            color: #a78bfa;
            padding: 0.25rem 0.75rem;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.75rem;
        }

        /* Scenario Section */
        .scenario-section {
            padding: 5rem 0;
            background: var(--bg-secondary);
        }

        .scenario-list {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .scenario-item {
            display: grid;
            grid-template-columns: 60px 1fr auto;
            gap: 1.5rem;
            align-items: start;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 1.75rem;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
        }

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

        .scenario-icon-circle {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(0, 229, 255, 0.15), rgba(0, 82, 255, 0.15));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            flex-shrink: 0;
        }

        .scenario-body h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
        }

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

        .scenario-action {
            display: flex;
            align-items: center;
            justify-content: flex-end;
        }

        .btn-outline-sm {
            padding: 0.5rem 1.1rem;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.85rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-outline-sm:hover {
            background: var(--accent-cyan);
            color: #000;
        }

        /* Steps / Flow Section */
        .flow-section {
            padding: 5rem 0;
        }

        .flow-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            counter-reset: flow-step;
        }

        .flow-step {
            position: relative;
            padding: 2rem;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            counter-increment: flow-step;
        }

        .flow-step::after {
            content: counter(flow-step);
            position: absolute;
            top: -15px;
            right: -10px;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: 0 4px 12px rgba(0, 229, 255, 0.3);
        }

        .flow-step-icon {
            font-size: 2.2rem;
            margin-bottom: 1rem;
        }

        .flow-step h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

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

        /* CTA Banner */
        .cta-banner {
            padding: 5rem 0;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.15), rgba(124, 58, 237, 0.1));
        }

        .cta-card {
            background: var(--bg-card);
            backdrop-filter: blur(25px);
            -webkit-backdrop-filter: blur(25px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 3rem;
            text-align: center;
            box-shadow: var(--shadow-glow);
        }

        .cta-card h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }

        .cta-card p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            margin-bottom: 2rem;
            line-height: 1.7;
        }

        .cta-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* FAQ Section */
        .faq-section {
            padding: 5rem 0;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            max-width: 800px;
        }

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

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

        .faq-question {
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: transparent;
            width: 100%;
            text-align: left;
            color: var(--text-primary);
            transition: color var(--transition-fast);
        }

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

        .faq-answer {
            padding: 0 1.5rem 1.25rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }

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

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

        .faq-icon {
            transition: transform var(--transition-fast);
        }

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

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 3.5rem 0 2rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2.5rem;
        }

        .footer-brand .logo-link {
            margin-bottom: 0.75rem;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
            max-width: 300px;
        }

        .footer-col h4 {
            font-weight: 700;
            margin-bottom: 0.75rem;
            font-size: 0.95rem;
        }

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

        .footer-col ul li {
            margin-bottom: 0.4rem;
        }

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

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

        .footer-bottom {
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-subtle);
            text-align: center;
        }

        .footer-bottom p {
            color: var(--text-muted);
            font-size: 0.85rem;
            margin-bottom: 0.75rem;
        }

        .footer-trust {
            display: flex;
            gap: 1.5rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .footer-trust span {
            color: var(--text-secondary);
            font-size: 0.8rem;
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }

        /* FAB */
        .fab-float {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 50;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 2px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            box-shadow: 0 0 18px rgba(0, 229, 255, 0.35);
            transition: all var(--transition-smooth);
            opacity: 0.65;
            animation: floatPulse 3s ease-in-out infinite;
        }

        .fab-float:hover {
            opacity: 1;
            transform: scale(1.12);
            box-shadow: 0 0 28px rgba(0, 229, 255, 0.55);
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-guid-wrapper {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

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

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

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

        @media (max-width: 768px) {
            .mobile-toggle {
                display: block;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(10, 14, 23, 0.95);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 1rem;
                border-bottom: 1px solid var(--border-subtle);
            }

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

            .category-hero {
                min-height: auto;
                padding: 6rem 0 3rem;
            }

            .section-title {
                font-size: 1.75rem;
            }

            .cta-card {
                padding: 2rem 1.5rem;
            }

            .cta-card h2 {
                font-size: 1.5rem;
            }

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

            .scenario-item {
                grid-template-columns: 50px 1fr;
            }

            .scenario-action {
                grid-column: 1 / -1;
                justify-content: flex-start;
            }
        }

        @media (max-width: 520px) {
            .header-actions .btn-login,
            .header-actions .btn-signup {
                padding: 0.45rem 0.9rem;
                font-size: 0.8rem;
            }

            .logo-link {
                font-size: 1rem;
            }

            .hero-guid-content h1 {
                font-size: 1.75rem;
            }

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

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

            .cta-buttons {
                flex-direction: column;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.75);
            --accent-cyan: #00F0FF;
            --accent-blue: #0052FF;
            --accent-purple: #7C3AED;
            --text-primary: #F1F5F9;
            --text-secondary: #CBD5E1;
            --text-muted: #64748B;
            --border-subtle: rgba(148, 163, 184, 0.12);
            --border-glow: rgba(0, 240, 255, 0.35);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.25);
            --shadow-glow-strong: 0 0 40px rgba(0, 82, 255, 0.4);
            --radius-sm: 0.75rem;
            --radius-md: 1rem;
            --radius-lg: 1.5rem;
            --radius-xl: 2rem;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            min-height: 100vh;
            overflow-x: hidden;
            padding-top: 68px;
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        
        button {
            cursor: pointer;
            font-family: inherit;
            outline: none;
        }
        
        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background var(--transition-smooth);
            height: 68px;
        }
        
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 2rem;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        
        .logo-link {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-weight: 800;
            font-size: 1.25rem;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }
        
        .logo-link:hover {
            opacity: 0.85;
        }
        
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 0 14px rgba(0, 240, 255, 0.25);
        }
        
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        
        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 0.55rem 1.15rem;
            border-radius: var(--radius-md);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            position: relative;
        }
        
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }
        
        .nav-links a.active {
            color: var(--accent-cyan);
        }
        
        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        
        .btn-login,
        .btn-signup {
            padding: 0.55rem 1.25rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }
        
        .btn-login {
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-subtle);
        }
        
        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }
        
        .btn-signup {
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            box-shadow: 0 4px 18px rgba(0, 240, 255, 0.25);
        }
        
        .btn-signup:hover {
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.4);
            transform: translateY(-1px);
        }
        
        .btn-signup:active {
            transform: translateY(0);
        }
        
        .mobile-toggle {
            display: none;
            background: transparent;
            color: var(--text-primary);
            font-size: 1.6rem;
            padding: 0.4rem;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-subtle);
        }
        
        /* Hero Section - Coupon Wall */
        .hero-banner {
            position: relative;
            background: linear-gradient(180deg, rgba(0, 82, 255, 0.1) 0%, rgba(8, 9, 15, 1) 75%),
                url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            padding: 5rem 0 4rem;
            min-height: 80vh;
            display: flex;
            align-items: center;
        }
        
        .hero-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 50% 30%, rgba(0, 240, 255, 0.08) 0%, transparent 60%);
            pointer-events: none;
        }
        
        .coupon-main {
            background: rgba(13, 17, 30, 0.8);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 3rem 2.5rem;
            box-shadow: var(--shadow-glow-strong), 0 20px 60px rgba(0, 0, 0, 0.6);
            position: relative;
            text-align: center;
            max-width: 650px;
            margin: 0 auto;
        }
        
        .coupon-main::after {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: var(--radius-xl);
            padding: 2px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue), var(--accent-purple));
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            pointer-events: none;
        }
        
        .coupon-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 0.5rem 1.5rem;
            border-radius: 50px;
            margin-bottom: 1.5rem;
            letter-spacing: 0.08em;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.35);
        }
        
        .coupon-main h1 {
            font-size: 2.75rem;
            font-weight: 900;
            letter-spacing: -0.03em;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, #FFFFFF, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        
        .coupon-main .subtitle {
            font-size: 1.2rem;
            color: var(--text-secondary);
            margin-bottom: 2rem;
            line-height: 1.6;
        }
        
        .coupon-value {
            font-size: 3.5rem;
            font-weight: 900;
            color: var(--accent-cyan);
            margin: 1.5rem 0;
            text-shadow: 0 0 30px rgba(0, 240, 255, 0.5);
            letter-spacing: -0.02em;
        }
        
        .btn-claim {
            display: inline-flex;
            align-items: center;
            gap: 0.75rem;
            padding: 1.1rem 2.8rem;
            font-size: 1.2rem;
            font-weight: 700;
            color: #000;
            background: linear-gradient(135deg, var(--accent-cyan), #B3FFFC);
            border: none;
            border-radius: 50px;
            box-shadow: 0 10px 40px rgba(0, 240, 255, 0.45);
            transition: all var(--transition-smooth);
            letter-spacing: 0.03em;
        }
        
        .btn-claim:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 50px rgba(0, 240, 255, 0.65);
        }
        
        .btn-claim:active {
            transform: translateY(-1px);
        }
        
        .coupon-terms {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 1.25rem;
        }
        
        /* Section Titles */
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 600;
            font-size: 0.85rem;
            letter-spacing: 0.06em;
            color: var(--accent-cyan);
            text-transform: uppercase;
            margin-bottom: 0.75rem;
        }
        
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 1rem;
            line-height: 1.25;
        }
        
        .section-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 700px;
            line-height: 1.7;
        }
        
        /* Steps Section */
        .steps-section {
            padding: 5rem 0;
            background: var(--bg-secondary);
            position: relative;
        }
        
        .step-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2.5rem 2rem;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
            height: 100%;
        }
        
        .step-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(180deg, var(--accent-cyan), var(--accent-blue));
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        }
        
        .step-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        
        .step-number {
            font-size: 3.5rem;
            font-weight: 900;
            color: rgba(0, 240, 255, 0.15);
            position: absolute;
            top: 1rem;
            right: 1.5rem;
            line-height: 1;
        }
        
        .step-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
            margin-bottom: 1.5rem;
            box-shadow: 0 0 20px rgba(0, 82, 255, 0.3);
        }
        
        .step-card h3 {
            font-weight: 700;
            font-size: 1.35rem;
            margin-bottom: 0.75rem;
            position: relative;
        }
        
        .step-card p {
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        
        /* Platform Cards */
        .platforms-section {
            padding: 5rem 0;
        }
        
        .platform-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2rem;
            text-align: center;
            transition: all var(--transition-smooth);
            height: 100%;
        }
        
        .platform-card:hover {
            border-color: rgba(0, 240, 255, 0.5);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.2);
            transform: translateY(-4px);
        }
        
        .platform-icon {
            font-size: 3rem;
            color: var(--accent-cyan);
            margin-bottom: 1.25rem;
            text-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
        }
        
        .platform-card h3 {
            font-weight: 700;
            font-size: 1.3rem;
            margin-bottom: 0.75rem;
        }
        
        .platform-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 1.5rem;
        }
        
        .btn-download {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            font-weight: 600;
            border-radius: 50px;
            background: transparent;
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
            transition: all var(--transition-fast);
            font-size: 0.95rem;
        }
        
        .btn-download:hover {
            background: var(--accent-cyan);
            color: #000;
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.4);
        }
        
        /* Comparison / Benefits */
        .benefits-section {
            padding: 5rem 0;
            background: var(--bg-secondary);
        }
        
        .benefit-list {
            list-style: none;
            padding: 0;
        }
        
        .benefit-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            padding: 1.25rem 0;
            border-bottom: 1px solid var(--border-subtle);
        }
        
        .benefit-check {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), #00FF88);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #000;
            font-weight: 700;
            flex-shrink: 0;
            font-size: 0.85rem;
        }
        
        .benefit-text h4 {
            font-weight: 600;
            font-size: 1.1rem;
            margin-bottom: 0.25rem;
        }
        
        .benefit-text p {
            color: var(--text-secondary);
            margin: 0;
            font-size: 0.95rem;
        }
        
        /* FAQ */
        .faq-section {
            padding: 5rem 0;
        }
        
        .accordion-faq .accordion-item {
            background: transparent;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md) !important;
            margin-bottom: 0.75rem;
            overflow: hidden;
        }
        
        .accordion-faq .accordion-button {
            background: var(--bg-card);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1.05rem;
            padding: 1.25rem 1.5rem;
            box-shadow: none;
            border: none;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-radius: var(--radius-md) !important;
        }
        
        .accordion-faq .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-cyan);
            border-bottom: 1px solid var(--border-subtle);
        }
        
        .accordion-faq .accordion-button::after {
            filter: invert(0.7);
        }
        
        .accordion-faq .accordion-body {
            background: rgba(13, 17, 30, 0.6);
            color: var(--text-secondary);
            padding: 1.25rem 1.5rem;
            line-height: 1.7;
        }
        
        /* CTA Bar */
        .cta-sticky-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1030;
            background: rgba(8, 9, 15, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-top: 1px solid var(--border-glow);
            padding: 1rem 1.5rem;
            box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.6);
        }
        
        .cta-bar-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        
        .cta-bar-text {
            font-weight: 600;
            font-size: 1.05rem;
        }
        
        .cta-bar-text span {
            color: var(--accent-cyan);
        }
        
        .btn-cta-bar {
            padding: 0.75rem 2.2rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #000;
            border: none;
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.5);
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }
        
        .btn-cta-bar:hover {
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.7);
            transform: scale(1.03);
        }
        
        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 3rem 0 1.5rem;
            margin-bottom: 80px;
        }
        
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2rem;
        }
        
        .footer-brand .logo-link {
            font-size: 1.15rem;
            margin-bottom: 0.75rem;
            display: inline-flex;
        }
        
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            margin: 0;
        }
        
        .footer-col h4 {
            font-weight: 700;
            font-size: 0.95rem;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }
        
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .footer-col ul li {
            margin-bottom: 0.5rem;
        }
        
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        
        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }
        
        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 1.5rem;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        
        .footer-trust {
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            flex-wrap: wrap;
            margin-top: 0.75rem;
            font-size: 0.8rem;
        }
        
        /* FAB */
        .fab-floating {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 1040;
            width: 52px;
            height: 52px;
            border-radius: 50px;
            background: rgba(8, 9, 15, 0.7);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.4);
            transition: all var(--transition-smooth);
            cursor: pointer;
            color: var(--accent-cyan);
            font-size: 1.3rem;
            animation: floatPulse 3s ease-in-out infinite;
        }
        
        .fab-floating::before {
            content: '';
            position: absolute;
            inset: -3px;
            border-radius: 50px;
            padding: 3px;
            background: linear-gradient(135deg, #00F0FF, #0052FF);
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            pointer-events: none;
        }
        
        .fab-floating:hover {
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
            transform: scale(1.08);
        }
        
        @keyframes floatPulse {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }
        
        /* Responsive */
        @media (max-width: 991px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .coupon-main h1 {
                font-size: 2.2rem;
            }
            .coupon-value {
                font-size: 2.8rem;
            }
        }
        
        @media (max-width: 767px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.97);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 1rem;
                gap: 0.35rem;
                border-bottom: 1px solid var(--border-subtle);
            }
            .nav-links.show {
                display: flex;
            }
            .mobile-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .coupon-main {
                padding: 2rem 1.5rem;
            }
            .coupon-main h1 {
                font-size: 1.8rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .cta-bar-inner {
                flex-direction: column;
                text-align: center;
            }
            .hero-banner {
                padding: 3rem 0 2rem;
                min-height: 70vh;
            }
        }
        
        @media (max-width: 519px) {
            .header-actions .btn-login {
                display: none;
            }
            .coupon-main h1 {
                font-size: 1.5rem;
            }
            .coupon-value {
                font-size: 2.2rem;
            }
            .btn-claim {
                width: 100%;
                justify-content: center;
                padding: 1rem 1.5rem;
                font-size: 1.05rem;
            }
            .fab-floating {
                width: 44px;
                height: 44px;
                left: 1rem;
                bottom: 5.5rem;
                font-size: 1.1rem;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: #111827;
            --bg-card: rgba(17, 25, 40, 0.75);
            --accent-cyan: #00E5FF;
            --accent-blue: #0052FF;
            --accent-purple: #7C3AED;
            --accent-pink: #FF007F;
            --accent-green: #32CD32;
            --text-primary: #F1F5F9;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-subtle: rgba(148, 163, 184, 0.12);
            --border-glow: rgba(0, 229, 255, 0.35);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 229, 255, 0.3);
            --radius-sm: 0.75rem;
            --radius-md: 1rem;
            --radius-lg: 1.5rem;
            --radius-xl: 2rem;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: rgba(10, 14, 23, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background var(--transition-smooth);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 2rem;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-weight: 800;
            font-size: 1.25rem;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }

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

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 0 14px rgba(0, 229, 255, 0.25);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 0.55rem 1.15rem;
            border-radius: var(--radius-md);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }

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

        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .btn-login {
            padding: 0.55rem 1.25rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
        }

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

        .btn-signup {
            padding: 0.55rem 1.25rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.9rem;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            box-shadow: 0 4px 18px rgba(0, 229, 255, 0.25);
            transition: all var(--transition-fast);
        }

        .btn-signup:hover {
            box-shadow: 0 6px 24px rgba(0, 229, 255, 0.4);
            transform: translateY(-1px);
        }

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

        .mobile-toggle {
            display: none;
            background: transparent;
            color: var(--text-primary);
            font-size: 1.6rem;
            padding: 0.4rem;
            border-radius: var(--radius-sm);
        }

        /* Hero - Category Page */
        .category-hero {
            padding: 8rem 0 5rem;
            position: relative;
            overflow: hidden;
            background: linear-gradient(180deg, rgba(0, 82, 255, 0.12) 0%, rgba(124, 58, 237, 0.06) 100%),
                url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            min-height: 70vh;
            display: flex;
            align-items: center;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 14, 23, 0.5);
            z-index: 0;
        }

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

        .hero-content-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }

        .hero-text h1 {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1.2;
            letter-spacing: -0.03em;
            margin-bottom: 1.5rem;
            background: linear-gradient(135deg, #FFFFFF, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-text .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 2rem;
        }

        .hero-stats {
            display: flex;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 0.3rem;
        }

        .hero-stat .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

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

        .hero-cta-buttons {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .btn-primary-glow {
            padding: 0.85rem 2.2rem;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1rem;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
            box-shadow: 0 6px 28px rgba(0, 229, 255, 0.35);
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn-primary-glow:hover {
            box-shadow: 0 8px 36px rgba(0, 229, 255, 0.5);
            transform: translateY(-2px);
        }

        .btn-outline-light {
            padding: 0.85rem 2.2rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn-outline-light:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
        }

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

        .community-showcase {
            width: 100%;
            max-width: 450px;
            background: var(--bg-card);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-xl);
            padding: 2rem;
            box-shadow: var(--shadow-card);
        }

        .community-card-image {
            width: 100%;
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 1.5rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
        }

        .community-card-image img {
            width: 100%;
            height: auto;
            transition: transform var(--transition-smooth);
        }

        .community-card-image:hover img {
            transform: scale(1.03);
        }

        .community-meta {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 1rem;
        }

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

        .avatar-dot {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 2px solid var(--bg-card);
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.8rem;
            color: #fff;
            margin-left: -10px;
        }

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

        .community-online {
            font-size: 0.85rem;
            color: var(--accent-green);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }

        .online-dot {
            width: 8px;
            height: 8px;
            background: var(--accent-green);
            border-radius: 50%;
            box-shadow: 0 0 8px var(--accent-green);
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.4;
            }
        }

        /* Features Section */
        .features-section {
            padding: 5rem 0;
            background: var(--bg-secondary);
        }

        .section-header {
            margin-bottom: 3.5rem;
        }

        .section-label {
            display: inline-block;
            padding: 0.4rem 1.2rem;
            background: rgba(0, 229, 255, 0.08);
            border: 1px solid var(--border-glow);
            border-radius: 2rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-cyan);
            letter-spacing: 0.04em;
            margin-bottom: 1.25rem;
        }

        .section-header h2 {
            font-size: 2.4rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 0.75rem;
        }

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

        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .feature-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2rem 1.75rem;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

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

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

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

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, rgba(0, 229, 255, 0.12), rgba(124, 58, 237, 0.12));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent-cyan);
            margin-bottom: 1.5rem;
        }

        .feature-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }

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

        /* Community Channels */
        .channels-section {
            padding: 5rem 0;
            background: var(--bg-primary);
        }

        .channels-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
        }

        .channel-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2.5rem 2rem;
            display: flex;
            gap: 1.75rem;
            align-items: flex-start;
            transition: all var(--transition-smooth);
            cursor: pointer;
        }

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

        .channel-icon-large {
            width: 72px;
            height: 72px;
            border-radius: var(--radius-md);
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.2rem;
        }

        .channel-facebook {
            background: linear-gradient(135deg, #1877F2, #0C5DC7);
            color: #fff;
        }

        .channel-discord {
            background: linear-gradient(135deg, #5865F2, #404EED);
            color: #fff;
        }

        .channel-youtube {
            background: linear-gradient(135deg, #FF0000, #C70000);
            color: #fff;
        }

        .channel-telegram {
            background: linear-gradient(135deg, #0088cc, #006699);
            color: #fff;
        }

        .channel-info h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .channel-info .channel-members {
            font-size: 0.9rem;
            color: var(--accent-cyan);
            font-weight: 600;
            margin-bottom: 0.75rem;
        }

        .channel-info p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 1rem;
        }

        .channel-link {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--accent-cyan);
            transition: all var(--transition-fast);
        }

        .channel-link:hover {
            color: #fff;
            gap: 0.75rem;
        }

        /* Events Section */
        .events-section {
            padding: 5rem 0;
            background: var(--bg-secondary);
        }

        .events-list {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .event-item {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 1.75rem 2rem;
            display: flex;
            gap: 2rem;
            align-items: center;
            transition: all var(--transition-smooth);
        }

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

        .event-date {
            flex-shrink: 0;
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
            border-radius: var(--radius-md);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
        }

        .event-date .day {
            font-size: 1.8rem;
            line-height: 1;
        }

        .event-date .month {
            font-size: 0.85rem;
            letter-spacing: 0.06em;
        }

        .event-details {
            flex: 1;
        }

        .event-details h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
        }

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

        .event-badge {
            padding: 0.4rem 1rem;
            border-radius: 2rem;
            font-size: 0.8rem;
            font-weight: 700;
            white-space: nowrap;
            letter-spacing: 0.03em;
        }

        .badge-hot {
            background: rgba(255, 0, 127, 0.15);
            color: #FF007F;
            border: 1px solid rgba(255, 0, 127, 0.3);
        }

        .badge-new {
            background: rgba(0, 229, 255, 0.12);
            color: var(--accent-cyan);
            border: 1px solid var(--border-glow);
        }

        /* Testimonials */
        .testimonials-section {
            padding: 5rem 0;
            background: var(--bg-primary);
        }

        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.75rem;
        }

        .testimonial-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2rem 1.75rem;
            transition: all var(--transition-smooth);
        }

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

        .testimonial-stars {
            color: #FFD700;
            font-size: 0.9rem;
            margin-bottom: 1rem;
            letter-spacing: 0.1em;
        }

        .testimonial-text {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 1.25rem;
            font-style: italic;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .author-avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            color: #fff;
        }

        .author-name {
            font-weight: 600;
            font-size: 0.95rem;
        }

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

        /* FAQ */
        .faq-section {
            padding: 5rem 0;
            background: var(--bg-secondary);
        }

        .faq-list {
            max-width: 850px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
        }

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

        .faq-question {
            width: 100%;
            padding: 1.5rem 2rem;
            background: transparent;
            color: var(--text-primary);
            font-size: 1.05rem;
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            text-align: left;
            transition: color var(--transition-fast);
        }

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

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
            padding: 0 2rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 1.5rem;
        }

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

        /* CTA Section */
        .cta-section {
            padding: 6rem 0;
            background: linear-gradient(180deg, rgba(0, 82, 255, 0.06) 0%, rgba(124, 58, 237, 0.1) 100%),
                url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
            position: relative;
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 14, 23, 0.55);
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: 2.6rem;
            font-weight: 900;
            letter-spacing: -0.02em;
            margin-bottom: 1.25rem;
        }

        .cta-section p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            margin-bottom: 2.5rem;
            max-width: 650px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-buttons {
            display: flex;
            gap: 1.25rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 4rem 0 2rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 3rem;
            margin-bottom: 3rem;
        }

        .footer-brand .logo-link {
            margin-bottom: 1rem;
            display: inline-flex;
        }

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

        .footer-col h4 {
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 1.25rem;
            color: var(--text-primary);
        }

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

        .footer-col ul li {
            margin-bottom: 0.75rem;
        }

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

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

        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
        }

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

        .footer-trust {
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
        }

        .footer-trust span {
            color: var(--text-muted);
            font-size: 0.8rem;
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }

        /* FAB */
        .fab-container {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 50;
        }

        .fab-button {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(10, 14, 23, 0.75);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 2px solid transparent;
            background-clip: padding-box;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.5);
            transition: all var(--transition-fast);
            cursor: pointer;
            animation: float 3s ease-in-out infinite;
        }

        .fab-button::before {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
            z-index: -1;
            opacity: 0.7;
        }

        .fab-button:hover {
            transform: scale(1.15);
            box-shadow: 0 0 32px rgba(0, 229, 255, 0.7);
        }

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

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

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

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

        /* Mobile Responsive */
        @media (max-width: 1024px) {
            .hero-content-wrapper {
                grid-template-columns: 1fr;
                gap: 3rem;
            }
            .hero-text h1 {
                font-size: 2.4rem;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(10, 14, 23, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 1.5rem;
                gap: 0.5rem;
                transform: translateY(-120%);
                transition: transform var(--transition-smooth);
                border-bottom: 1px solid var(--border-subtle);
            }
            .nav-links.open {
                transform: translateY(0);
            }
            .nav-links a {
                width: 100%;
                justify-content: flex-start;
                padding: 0.75rem 1rem;
            }
            .mobile-toggle {
                display: block;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .channels-grid {
                grid-template-columns: 1fr;
            }
            .testimonials-grid {
                grid-template-columns: 1fr;
            }
            .event-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 1rem;
            }
            .hero-stats {
                flex-direction: column;
                gap: 1.25rem;
            }
            .hero-text h1 {
                font-size: 2rem;
            }
            .section-header h2 {
                font-size: 1.8rem;
            }
            .cta-section h2 {
                font-size: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-trust {
                justify-content: center;
            }
            .header-actions .btn-login {
                display: inline-flex;
            }
            .header-actions .btn-signup {
                display: inline-flex;
            }
        }

        @media (max-width: 520px) {
            .hero-text h1 {
                font-size: 1.7rem;
            }
            .hero-cta-buttons {
                flex-direction: column;
            }
            .btn-primary-glow,
            .btn-outline-light {
                width: 100%;
                justify-content: center;
            }
            .container {
                padding: 0 1rem;
            }
            .category-hero {
                padding: 7rem 0 3rem;
                min-height: auto;
            }
            .cta-buttons {
                flex-direction: column;
            }
            .fab-container {
                left: 1rem;
                bottom: 5rem;
            }
            .fab-button {
                width: 48px;
                height: 48px;
                font-size: 1.4rem;
            }
        }