/* roulang page: index */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-subtle: rgba(0, 240, 255, 0.2);
            --border-glow: rgba(0, 240, 255, 0.6);
            --gradient-hero: linear-gradient(135deg, #08090F 0%, #0D111E 50%, #0A1A30 100%);
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --font-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

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

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

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

        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* Navigation */
        .nav-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background 0.3s ease;
        }

        .nav-header.scrolled {
            background: rgba(8, 9, 15, 0.95);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .nav-logo {
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            background: linear-gradient(135deg, #FFFFFF, #00F0FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 0.3rem 0;
            transition: color 0.2s ease;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: width 0.3s ease;
            border-radius: 2px;
        }

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

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .btn-login {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 0.5rem 1.2rem;
            border-radius: 8px;
            transition: all 0.2s ease;
            border: 1px solid transparent;
        }

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

        .btn-signup {
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 0.55rem 1.5rem;
            border-radius: 8px;
            transition: all 0.3s ease;
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.3);
        }

        .btn-signup:hover {
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.55);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            color: var(--text-primary);
            font-size: 1.8rem;
            padding: 0.3rem;
            border-radius: 6px;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(8, 9, 15, 0.98);
            backdrop-filter: blur(20px);
            z-index: 99;
            flex-direction: column;
            padding: 2rem 1.5rem;
            gap: 1.5rem;
            overflow-y: auto;
        }

        .mobile-menu.active {
            display: flex;
        }

        .mobile-menu a {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-primary);
            padding: 0.8rem 1rem;
            border-radius: 8px;
            transition: background 0.2s;
            display: block;
        }

        .mobile-menu a:hover {
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
        }

        /* Hero Section */
        .hero-section {
            padding: 140px 0 80px;
            background: var(--gradient-hero);
            position: relative;
            overflow: hidden;
            min-height: 70vh;
            display: flex;
            align-items: center;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            top: 40%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.15) 0%, transparent 70%);
            z-index: 0;
            border-radius: 50%;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 700px;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            font-size: 0.85rem;
            font-weight: 600;
            padding: 0.35rem 1rem;
            border-radius: 50px;
            margin-bottom: 1.5rem;
            letter-spacing: 0.02em;
        }

        .hero-title {
            font-family: var(--font-heading);
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 1.5rem;
            background: linear-gradient(135deg, #FFFFFF 0%, #CBD5E1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 2rem;
            max-width: 600px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 2.5rem;
        }

        .btn-primary {
            background: linear-gradient(135deg, #0052FF, #0077FF);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 1rem;
            padding: 0.8rem 2rem;
            border-radius: 10px;
            transition: all 0.3s ease;
            box-shadow: 0 0 20px rgba(0, 82, 255, 0.4);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn-primary:hover {
            box-shadow: 0 0 35px rgba(0, 82, 255, 0.65);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            padding: 0.8rem 2rem;
            border-radius: 10px;
            border: 1px solid var(--border-glow);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

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

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

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

        .hero-stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.2;
        }

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

        .hero-search {
            position: relative;
            z-index: 1;
            max-width: 650px;
            margin-top: 3rem;
        }

        .hero-search input {
            width: 100%;
            background: rgba(13, 17, 30, 0.8);
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
            padding: 1rem 3.5rem 1rem 1.5rem;
            border-radius: 50px;
            font-size: 1rem;
            backdrop-filter: blur(8px);
            transition: all 0.3s ease;
        }

        .hero-search input:focus {
            outline: none;
            border-color: var(--accent-cyan);
            box-shadow: 0 0 20px var(--accent-glow);
        }

        .hero-search button {
            position: absolute;
            right: 6px;
            top: 6px;
            bottom: 6px;
            width: 48px;
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            color: #FFFFFF;
            border-radius: 50%;
            font-size: 1.1rem;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-search button:hover {
            box-shadow: 0 0 20px var(--accent-glow);
        }

        .hero-popular {
            position: relative;
            z-index: 1;
            margin-top: 1rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.5rem;
        }

        .hero-popular span {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .hero-popular a {
            font-size: 0.8rem;
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-cyan);
            padding: 0.25rem 0.8rem;
            border-radius: 50px;
            border: 1px solid var(--border-subtle);
            transition: all 0.2s ease;
        }

        .hero-popular a:hover {
            background: rgba(0, 240, 255, 0.18);
            border-color: var(--accent-cyan);
        }

        /* Section Common */
        .section {
            padding: 80px 0;
        }

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

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            margin-bottom: 0.75rem;
            border-left: 3px solid var(--accent-cyan);
            padding-left: 0.75rem;
        }

        .section-title {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 650px;
            line-height: 1.7;
        }

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

        .collection-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2rem;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .collection-card::before {
            content: '';
            position: absolute;
            top: -20px;
            right: -20px;
            width: 80px;
            height: 80px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.2) 0%, transparent 70%);
            border-radius: 50%;
        }

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

        .collection-icon {
            font-size: 2.2rem;
            color: var(--accent-cyan);
            margin-bottom: 1.2rem;
        }

        .collection-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: var(--text-primary);
        }

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

        .collection-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            margin-top: 1.2rem;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--accent-cyan);
            transition: gap 0.3s ease;
        }

        .collection-card .card-link:hover {
            gap: 0.7rem;
        }

        /* Recommendation Section */
        .recommend-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.5rem;
        }

        .recommend-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .recommend-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.2);
            transform: translateY(-4px);
        }

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

        .recommend-body {
            padding: 1.5rem;
        }

        .recommend-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }

        .recommend-body p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .recommend-body .tag {
            display: inline-block;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.7rem;
            border-radius: 50px;
            margin-top: 0.8rem;
        }

        /* News Section */
        .news-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 2.5rem;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }

        .news-item {
            display: flex;
            gap: 1.2rem;
            padding: 1.2rem;
            background: var(--bg-card);
            backdrop-filter: blur(8px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            transition: all 0.3s ease;
            align-items: center;
        }

        .news-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.15);
        }

        .news-item .news-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            white-space: nowrap;
            min-width: 70px;
        }

        .news-item h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            flex: 1;
        }

        .news-item .news-cat {
            font-size: 0.75rem;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            padding: 0.2rem 0.7rem;
            border-radius: 50px;
            white-space: nowrap;
        }

        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }

        .sidebar-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
        }

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

        .sidebar-card ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
        }

        .sidebar-card ul li a {
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: color 0.2s ease;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

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

        .sidebar-card ul li a i {
            color: var(--accent-cyan);
            font-size: 0.7rem;
        }

        /* Milestones */
        .milestone-track {
            display: flex;
            justify-content: space-between;
            position: relative;
            flex-wrap: wrap;
            gap: 2rem;
        }

        .milestone-track::before {
            content: '';
            position: absolute;
            top: 24px;
            left: 2rem;
            right: 2rem;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
            z-index: 0;
        }

        .milestone-item {
            position: relative;
            z-index: 1;
            text-align: center;
            flex: 1;
            min-width: 120px;
        }

        .milestone-dot {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--bg-primary);
            border: 3px solid var(--accent-cyan);
            margin: 0 auto 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--accent-cyan);
            box-shadow: 0 0 16px var(--accent-glow);
        }

        .milestone-item h4 {
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-primary);
            margin-bottom: 0.3rem;
        }

        .milestone-item p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Entry Matrix */
        .entry-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 1.2rem;
        }

        .entry-btn {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.6rem;
            padding: 1.8rem 1rem;
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            transition: all 0.3s ease;
            text-align: center;
        }

        .entry-btn:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.25);
            transform: translateY(-3px);
        }

        .entry-btn i {
            font-size: 2rem;
            color: var(--accent-cyan);
        }

        .entry-btn span {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-primary);
        }

        /* Save & Share */
        .save-share {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1.5rem;
            flex-wrap: wrap;
        }

        .save-share .btn-save,
        .save-share .btn-share {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: all 0.3s ease;
            border: 1px solid var(--border-glow);
            background: rgba(0, 240, 255, 0.05);
            color: var(--text-primary);
        }

        .save-share .btn-save:hover,
        .save-share .btn-share:hover {
            background: rgba(0, 240, 255, 0.15);
            box-shadow: 0 0 20px var(--accent-glow);
            color: var(--accent-cyan);
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(13, 17, 30, 0.8);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
            animation: fabPulse 2.5s infinite ease-in-out;
        }

        .fab::before {
            content: '';
            position: absolute;
            inset: -3px;
            border-radius: 50%;
            padding: 3px;
            background: linear-gradient(135deg, #0052FF, #00F0FF, #0052FF);
            background-size: 200% 200%;
            -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;
            animation: borderRotate 2s linear infinite;
        }

        @keyframes fabPulse {
            0%, 100% { opacity: 0.8; transform: scale(1); }
            50% { opacity: 1; transform: scale(1.05); }
        }

        @keyframes borderRotate {
            0% { background-position: 0% 0%; }
            100% { background-position: 200% 200%; }
        }

        .fab:hover {
            transform: scale(1.15);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.7);
            color: #FFFFFF;
        }

        /* Footer */
        .footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 50px 0 30px;
        }

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

        .footer-col h4 {
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 1.2rem;
            color: var(--text-primary);
        }

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

        .footer-col ul li a {
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: color 0.2s;
        }

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

        .footer-logo {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            font-weight: 700;
            background: linear-gradient(135deg, #FFFFFF, #00F0FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 0.8rem;
        }

        .footer-bottom {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 2.4rem;
            }
            .news-layout {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .milestone-track::before {
                display: none;
            }
            .milestone-track {
                flex-direction: column;
                align-items: flex-start;
                gap: 1.5rem;
            }
            .milestone-item {
                display: flex;
                align-items: center;
                gap: 1rem;
                text-align: left;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-stats {
                gap: 1.5rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .collection-grid,
            .recommend-grid,
            .entry-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-subtle: rgba(0, 240, 255, 0.2);
            --border-glow: rgba(0, 240, 255, 0.6);
            --gradient-hero: linear-gradient(135deg, #08090F 0%, #0D111E 50%, #0A1A30 100%);
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --font-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-body);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }
        button {
            cursor: pointer;
            border: none;
            font-family: inherit;
        }
        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        /* Navigation */
        .nav-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background 0.3s ease;
        }
        .nav-header.scrolled {
            background: rgba(8, 9, 15, 0.95);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .nav-logo {
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            background: linear-gradient(135deg, #FFFFFF, #00F0FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }
        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 0.3rem 0;
            transition: color 0.2s ease;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: width 0.3s ease;
            border-radius: 2px;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-cyan);
        }
        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .btn-login {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 0.5rem 1.2rem;
            border-radius: 8px;
            transition: all 0.2s ease;
            border: 1px solid transparent;
        }
        .btn-login:hover {
            border-color: var(--border-glow);
            color: var(--accent-cyan);
        }
        .btn-signup {
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 0.55rem 1.5rem;
            border-radius: 8px;
            transition: all 0.3s ease;
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.3);
        }
        .btn-signup:hover {
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.55);
            transform: translateY(-1px);
        }
        .mobile-toggle {
            display: none;
            background: transparent;
            color: var(--text-primary);
            font-size: 1.8rem;
            padding: 0.3rem;
            border-radius: 6px;
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(8, 9, 15, 0.98);
            backdrop-filter: blur(20px);
            z-index: 99;
            flex-direction: column;
            padding: 2rem 1.5rem;
            gap: 1.5rem;
            overflow-y: auto;
        }
        .mobile-menu.active {
            display: flex;
        }
        .mobile-menu a {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-primary);
            padding: 0.8rem 1rem;
            border-radius: 8px;
            transition: background 0.2s;
            display: block;
        }
        .mobile-menu a:hover {
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
        }
        /* Page Banner */
        .page-banner {
            padding: 130px 0 60px;
            background: linear-gradient(135deg, #08090F 0%, #0D111E 50%, #0A1A30 100%);
            border-bottom: 1px solid var(--border-subtle);
            position: relative;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb {
            display: flex;
            gap: 0.5rem;
            align-items: center;
            margin-bottom: 1.5rem;
            font-size: 0.9rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--accent-cyan);
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: var(--text-primary);
        }
        .breadcrumb .separator {
            color: var(--text-muted);
            opacity: 0.5;
        }
        .page-title {
            font-family: var(--font-heading);
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, #FFFFFF 0%, #00F0FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-subtitle {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 700px;
            line-height: 1.7;
        }
        /* Strategy Sections */
        .strategy-section {
            padding: 70px 0;
        }
        .strategy-section:nth-child(even) {
            background: var(--bg-secondary);
        }
        .section-header {
            margin-bottom: 40px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 0.6rem;
            padding: 0.3rem 0.8rem;
            background: rgba(0, 240, 255, 0.1);
            border-radius: 20px;
            border: 1px solid var(--border-subtle);
        }
        .section-title {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.3;
            margin-bottom: 0.8rem;
        }
        .section-desc {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 750px;
            line-height: 1.7;
        }
        .strategy-content-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: start;
        }
        .strategy-visual {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-glow);
            border: 1px solid var(--border-subtle);
            position: relative;
        }
        .strategy-visual img {
            width: 100%;
            height: auto;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .strategy-visual:hover img {
            transform: scale(1.03);
        }
        .strategy-points {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .strategy-point-item {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .strategy-point-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: linear-gradient(180deg, var(--accent-cyan), var(--accent-blue));
            border-radius: 0 3px 3px 0;
        }
        .strategy-point-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateX(4px);
        }
        .strategy-point-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.4rem;
        }
        .strategy-point-desc {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        /* Step Flow */
        .step-flow {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 1.5rem;
            margin-top: 2rem;
        }
        .step-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            text-align: left;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .step-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        .step-number {
            font-family: var(--font-heading);
            font-size: 3rem;
            font-weight: 900;
            background: linear-gradient(135deg, #00F0FF, #0052FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
            margin-bottom: 1rem;
            opacity: 0.8;
        }
        .step-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }
        .step-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        /* Highlight Box */
        .highlight-box {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 2.5rem;
            box-shadow: var(--shadow-glow);
            margin: 2rem 0;
        }
        .highlight-box h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 1rem;
        }
        .highlight-box p {
            color: var(--text-secondary);
            line-height: 1.7;
            font-size: 1rem;
        }
        /* Tips Grid */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
        }
        .tip-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2rem;
            transition: all 0.3s ease;
        }
        .tip-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }
        .tip-icon {
            font-size: 2rem;
            color: var(--accent-cyan);
            margin-bottom: 1rem;
        }
        .tip-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }
        .tip-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        /* FAQ */
        .faq-section {
            padding: 70px 0;
            background: var(--bg-secondary);
        }
        .faq-grid {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            max-width: 850px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .faq-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }
        .faq-question {
            width: 100%;
            background: transparent;
            color: var(--text-primary);
            font-size: 1.05rem;
            font-weight: 600;
            padding: 1.25rem 1.5rem;
            text-align: left;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            transition: color 0.2s;
        }
        .faq-question:hover {
            color: var(--accent-cyan);
        }
        .faq-question i {
            transition: transform 0.3s ease;
            color: var(--accent-cyan);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            color: var(--text-muted);
            line-height: 1.7;
            font-size: 0.95rem;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 1.5rem;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        /* CTA */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, #0D111E 0%, #08090F 100%);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
            text-align: center;
        }
        .cta-title {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }
        .cta-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 1rem;
            padding: 0.9rem 2.2rem;
            border-radius: 12px;
            box-shadow: 0 0 24px rgba(0, 240, 255, 0.35);
            transition: all 0.3s ease;
        }
        .btn-primary:hover {
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
        }
        /* Footer */
        .footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-subtle);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-logo {
            font-family: var(--font-heading);
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, #FFFFFF, #00F0FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1.2rem;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color 0.2s;
        }
        .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;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .strategy-content-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .page-title {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            .nav-links, .nav-actions .btn-login {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-actions .btn-signup {
                display: block;
            }
            .page-banner {
                padding: 110px 0 40px;
            }
            .page-title {
                font-size: 1.8rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .step-flow {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 520px) {
            .page-title {
                font-size: 1.5rem;
            }
            .strategy-point-item {
                padding: 1rem;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-subtle: rgba(0, 240, 255, 0.2);
            --border-glow: rgba(0, 240, 255, 0.6);
            --gradient-hero: linear-gradient(135deg, #08090F 0%, #0D111E 50%, #0A1A30 100%);
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --font-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

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

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

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

        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* Navigation */
        .nav-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background 0.3s ease;
        }

        .nav-header.scrolled {
            background: rgba(8, 9, 15, 0.95);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .nav-logo {
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            background: linear-gradient(135deg, #FFFFFF, #00F0FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 0.3rem 0;
            transition: color 0.2s ease;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: width 0.3s ease;
            border-radius: 2px;
        }

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

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .btn-login {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 0.5rem 1.2rem;
            border-radius: 8px;
            transition: all 0.2s ease;
            border: 1px solid transparent;
        }

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

        .btn-signup {
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 0.55rem 1.5rem;
            border-radius: 8px;
            transition: all 0.3s ease;
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.3);
        }

        .btn-signup:hover {
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.55);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            color: var(--text-primary);
            font-size: 1.8rem;
            padding: 0.3rem;
            border-radius: 6px;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(8, 9, 15, 0.98);
            backdrop-filter: blur(20px);
            z-index: 99;
            flex-direction: column;
            padding: 2rem 1.5rem;
            gap: 1.5rem;
            overflow-y: auto;
        }

        .mobile-menu.active {
            display: flex;
        }

        .mobile-menu a {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-primary);
            padding: 0.8rem 1rem;
            border-radius: 8px;
            transition: background 0.2s;
            display: block;
        }

        .mobile-menu a:hover {
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
        }

        /* Article Page Styles */
        .article-page {
            padding-top: 110px;
            padding-bottom: 80px;
            min-height: 100vh;
            background: var(--gradient-hero);
        }

        .article-header {
            position: relative;
            padding: 3rem 0 2rem;
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-subtle);
            margin-bottom: 3rem;
        }

        .article-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }

        .article-header-content {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--accent-cyan);
            transition: color 0.2s;
        }

        .breadcrumb a:hover {
            color: #FFFFFF;
        }

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

        .article-category-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.8rem;
            padding: 0.3rem 1rem;
            border-radius: 20px;
            border: 1px solid var(--border-subtle);
            margin-bottom: 1rem;
            letter-spacing: 0.02em;
        }

        .article-title {
            font-family: var(--font-heading);
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.3;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            flex-wrap: wrap;
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .article-meta span {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        .article-meta i {
            color: var(--accent-cyan);
        }

        .article-feature-image {
            width: 100%;
            height: 350px;
            object-fit: cover;
            border-radius: var(--radius-lg);
            margin-bottom: 2.5rem;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-subtle);
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 3rem;
            align-items: start;
        }

        .article-body {
            background: var(--bg-card);
            backdrop-filter: blur(10px);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-card);
            line-height: 1.8;
            font-size: 1.05rem;
            color: var(--text-secondary);
        }

        .article-body h2 {
            font-family: var(--font-heading);
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-subtle);
        }

        .article-body h3 {
            font-family: var(--font-heading);
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--accent-cyan);
            margin-top: 1.8rem;
            margin-bottom: 0.8rem;
        }

        .article-body p {
            margin-bottom: 1.2rem;
        }

        .article-body ul, .article-body ol {
            margin-left: 1.5rem;
            margin-bottom: 1.2rem;
        }

        .article-body li {
            margin-bottom: 0.5rem;
        }

        .article-body strong {
            color: var(--text-primary);
        }

        .article-body img {
            border-radius: var(--radius-md);
            margin: 1.5rem 0;
            border: 1px solid var(--border-subtle);
        }

        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
            position: sticky;
            top: 100px;
        }

        .sidebar-card {
            background: var(--bg-card);
            backdrop-filter: blur(10px);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-card);
        }

        .sidebar-card h4 {
            font-family: var(--font-heading);
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-subtle);
        }

        .sidebar-post-item {
            display: flex;
            gap: 0.8rem;
            padding: 0.8rem 0;
            border-bottom: 1px solid var(--border-subtle);
            transition: all 0.2s;
        }

        .sidebar-post-item:last-child {
            border-bottom: none;
        }

        .sidebar-post-item:hover {
            background: rgba(0, 240, 255, 0.05);
            border-radius: 8px;
            padding-left: 0.5rem;
            padding-right: 0.5rem;
        }

        .sidebar-post-thumb {
            width: 70px;
            height: 70px;
            object-fit: cover;
            border-radius: 8px;
            flex-shrink: 0;
        }

        .sidebar-post-info h5 {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 0.3rem;
        }

        .sidebar-post-info span {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .cta-banner {
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-glow);
        }

        .cta-banner h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 0.8rem;
            border: none;
            padding: 0;
        }

        .cta-banner p {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.9);
            margin-bottom: 1rem;
        }

        .btn-cta-sidebar {
            display: inline-block;
            background: #FFFFFF;
            color: #0052FF;
            font-weight: 700;
            padding: 0.6rem 1.8rem;
            border-radius: 8px;
            transition: all 0.3s;
            font-size: 0.9rem;
        }

        .btn-cta-sidebar:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.3);
        }

        .not-found-container {
            text-align: center;
            padding: 4rem 2rem;
        }

        .not-found-container i {
            font-size: 4rem;
            color: var(--accent-cyan);
            margin-bottom: 1.5rem;
        }

        .not-found-container h2 {
            font-size: 2rem;
            margin-bottom: 1rem;
        }

        .not-found-container p {
            color: var(--text-muted);
            margin-bottom: 2rem;
        }

        .btn-back-home {
            display: inline-block;
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            color: #FFFFFF;
            font-weight: 700;
            padding: 0.8rem 2rem;
            border-radius: 8px;
            transition: all 0.3s;
            box-shadow: var(--shadow-glow);
        }

        .btn-back-home:hover {
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
        }

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

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            margin-bottom: 3rem;
        }

        .footer-logo {
            font-family: var(--font-heading);
            font-size: 1.3rem;
            font-weight: 700;
            background: linear-gradient(135deg, #FFFFFF, #00F0FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 1rem;
        }

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

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

        .footer-col ul li {
            margin-bottom: 0.6rem;
        }

        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color 0.2s;
        }

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

        .footer-bottom a:hover {
            text-decoration: underline;
        }

        /* FAB Cyber-Neon Style */
        .fab-floating {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 50;
            background: rgba(0,0,0,0.6);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            border-image: linear-gradient(135deg, #0052FF, #00F0FF) 1;
            border-radius: 50px;
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            transition: all 0.3s ease;
            opacity: 0.8;
            cursor: pointer;
            text-decoration: none;
        }

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

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

        .fab-notification {
            position: absolute;
            top: 4px;
            right: 4px;
            width: 12px;
            height: 12px;
            background: #FF0055;
            border-radius: 50%;
            border: 2px solid #000;
            animation: pulse-notify 1.5s infinite;
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .article-body {
                padding: 1.5rem;
                font-size: 0.95rem;
            }
            .article-sidebar {
                grid-template-columns: 1fr;
            }
            .article-feature-image {
                height: 220px;
            }
            .article-header {
                padding: 2rem 0 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .nav-actions .btn-login {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .nav-inner {
                height: 60px;
            }
            .nav-logo {
                font-size: 1.1rem;
            }
            .article-title {
                font-size: 1.6rem;
            }
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.75);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-subtle: rgba(0, 240, 255, 0.2);
            --border-glow: rgba(0, 240, 255, 0.6);
            --gradient-hero: linear-gradient(135deg, #08090F 0%, #0D111E 50%, #0A1A30 100%);
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --font-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

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

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

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

        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        .nav-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-subtle);
            transition: all 0.3s ease;
        }

        .nav-header.scrolled {
            background: rgba(8, 9, 15, 0.96);
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.6);
        }

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

        .nav-logo {
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            background: linear-gradient(135deg, #FFFFFF, #00F0FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 0.35rem 0;
            transition: color 0.25s ease;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: width 0.3s ease;
            border-radius: 2px;
        }

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

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .btn-login {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 0.5rem 1.25rem;
            border-radius: 8px;
            transition: all 0.2s ease;
            border: 1px solid transparent;
        }

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

        .btn-signup {
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 0.55rem 1.6rem;
            border-radius: 8px;
            transition: all 0.3s ease;
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.3);
        }

        .btn-signup:hover {
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.55);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            color: var(--text-primary);
            font-size: 1.8rem;
            padding: 0.3rem;
            border-radius: 6px;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(8, 9, 15, 0.98);
            backdrop-filter: blur(24px);
            z-index: 99;
            flex-direction: column;
            padding: 2rem 1.5rem;
            gap: 1.8rem;
            overflow-y: auto;
        }

        .mobile-menu.active {
            display: flex;
        }

        .mobile-menu a {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-primary);
            padding: 0.8rem 1rem;
            border-radius: 8px;
            transition: background 0.2s;
            display: block;
        }

        .mobile-menu a:hover {
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
        }

        .hero-category {
            padding: 150px 0 80px;
            background: var(--gradient-hero);
            position: relative;
            overflow: hidden;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-category-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.12);
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.85rem;
            padding: 0.4rem 1rem;
            border-radius: 100px;
            border: 1px solid var(--border-subtle);
            margin-bottom: 1.5rem;
        }

        .hero-title {
            font-family: var(--font-heading);
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1.5rem;
            background: linear-gradient(135deg, #FFFFFF 0%, #CBD5E1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 2rem;
        }

        .hero-visual {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-glow);
            border: 1px solid var(--border-subtle);
        }

        .hero-visual img {
            width: 100%;
            height: auto;
            display: block;
        }

        .hero-visual-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(8,9,15,0.7) 100%);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 1rem;
            padding: 0.9rem 2.2rem;
            border-radius: 12px;
            transition: all 0.3s ease;
            box-shadow: 0 0 22px rgba(0, 240, 255, 0.35);
            white-space: nowrap;
        }

        .btn-primary:hover {
            box-shadow: 0 0 36px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
        }

        .section {
            padding: 80px 0;
        }

        .section-label {
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            margin-bottom: 0.75rem;
        }

        .section-title {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.3;
            margin-bottom: 1rem;
        }

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

        .tip-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2rem;
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
            position: relative;
            overflow: hidden;
        }

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

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

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

        .tip-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(0, 240, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            margin-bottom: 1.2rem;
        }

        .tip-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.6rem;
        }

        .tip-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

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

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

        .info-block {
            display: flex;
            align-items: flex-start;
            gap: 1.5rem;
            padding: 2rem;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            backdrop-filter: blur(10px);
        }

        .info-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1;
            flex-shrink: 0;
        }

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

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

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 1.8rem;
            margin-bottom: 1.2rem;
            transition: all 0.3s ease;
            cursor: pointer;
            backdrop-filter: blur(10px);
        }

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

        .faq-item h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: var(--text-primary);
        }

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

        .cta-section {
            background: var(--gradient-hero);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
            position: relative;
            overflow: hidden;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 3rem;
            margin-bottom: 40px;
        }

        .footer-logo {
            font-family: var(--font-heading);
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1.2rem;
        }

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

        .footer-col a {
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: color 0.2s;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 24px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 50;
            width: 52px;
            height: 52px;
            border-radius: 100px;
            background: rgba(8,9,15,0.65);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1.5px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.35);
            animation: floatBtn 3s ease-in-out infinite;
        }

        .fab-left::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 100px;
            padding: 2px;
            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;
        }

        .fab-left:hover {
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.65);
            transform: scale(1.08);
        }

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

        @media (max-width: 1024px) {
            .hero-category-grid {
                grid-template-columns: 1fr;
                gap: 2.5rem;
                text-align: center;
            }
            .hero-title {
                font-size: 2.4rem;
            }
            .hero-desc {
                max-width: 600px;
                margin-left: auto;
                margin-right: auto;
            }
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .hero-category {
                padding: 130px 0 60px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .grid-3,
            .grid-2 {
                grid-template-columns: 1fr;
            }
            .section {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .info-block {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .nav-actions {
                gap: 0.5rem;
            }
            .btn-login {
                font-size: 0.85rem;
                padding: 0.4rem 0.8rem;
            }
            .btn-signup {
                font-size: 0.85rem;
                padding: 0.45rem 1rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .tip-card {
                padding: 1.5rem;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-subtle: rgba(0, 240, 255, 0.2);
            --border-glow: rgba(0, 240, 255, 0.6);
            --gradient-hero: linear-gradient(135deg, #08090F 0%, #0D111E 50%, #0A1A30 100%);
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --font-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-body);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }
        button {
            cursor: pointer;
            border: none;
            font-family: inherit;
        }
        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        /* Navigation */
        .nav-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background 0.3s ease;
        }
        .nav-header.scrolled {
            background: rgba(8, 9, 15, 0.95);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .nav-logo {
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            background: linear-gradient(135deg, #FFFFFF, #00F0FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }
        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 0.3rem 0;
            transition: color 0.2s ease;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: width 0.3s ease;
            border-radius: 2px;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-cyan);
        }
        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .btn-login {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 0.5rem 1.2rem;
            border-radius: 8px;
            transition: all 0.2s ease;
            border: 1px solid transparent;
        }
        .btn-login:hover {
            border-color: var(--border-glow);
            color: var(--accent-cyan);
        }
        .btn-signup {
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 0.55rem 1.5rem;
            border-radius: 8px;
            transition: all 0.3s ease;
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.3);
        }
        .btn-signup:hover {
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.55);
            transform: translateY(-1px);
        }
        .mobile-toggle {
            display: none;
            background: transparent;
            color: var(--text-primary);
            font-size: 1.8rem;
            padding: 0.3rem;
            border-radius: 6px;
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(8, 9, 15, 0.98);
            backdrop-filter: blur(20px);
            z-index: 99;
            flex-direction: column;
            padding: 2rem 1.5rem;
            gap: 1.5rem;
            overflow-y: auto;
        }
        .mobile-menu.active {
            display: flex;
        }
        .mobile-menu a {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-primary);
            padding: 0.8rem 1rem;
            border-radius: 8px;
            transition: background 0.2s;
            display: block;
        }
        .mobile-menu a:hover {
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
        }
        /* Hero Section */
        .hero-section {
            padding: 140px 0 80px;
            background: var(--gradient-hero);
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
        }
        .hero-title {
            font-family: var(--font-heading);
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1.5rem;
            background: linear-gradient(135deg, #FFFFFF, #00F0FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 2rem;
            max-width: 600px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-glow);
            border-radius: 50px;
            padding: 0.5rem 1.2rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-cyan);
            margin-bottom: 1.5rem;
        }
        .btn-hero {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 1rem;
            padding: 0.85rem 2.2rem;
            border-radius: 10px;
            transition: all 0.3s ease;
            box-shadow: 0 0 24px rgba(0, 240, 255, 0.4);
        }
        .btn-hero:hover {
            box-shadow: 0 0 36px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
        }
        .hero-icons {
            display: flex;
            gap: 2rem;
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }
        .icon-stat {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            color: var(--text-secondary);
        }
        .icon-stat i {
            font-size: 2rem;
            color: var(--accent-cyan);
        }
        .icon-stat span {
            font-size: 0.9rem;
            line-height: 1.3;
        }
        /* Sections */
        .section {
            padding: 80px 0;
        }
        .section-title {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-muted);
            margin-bottom: 3rem;
            max-width: 650px;
            line-height: 1.7;
        }
        .glass-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 0.3s ease;
        }
        .glass-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
        }
        /* Feature sections */
        .feature-row {
            display: flex;
            gap: 3rem;
            align-items: center;
            margin-bottom: 3rem;
        }
        .feature-row.reverse {
            flex-direction: row-reverse;
        }
        .feature-text {
            flex: 1;
        }
        .feature-visual {
            flex: 1;
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
        }
        .feature-visual img {
            width: 100%;
            height: auto;
        }
        .step-list {
            list-style: none;
            counter-reset: step;
        }
        .step-list li {
            counter-increment: step;
            position: relative;
            padding-left: 3.5rem;
            margin-bottom: 2rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .step-list li::before {
            content: counter(step);
            position: absolute;
            left: 0;
            top: 0;
            width: 2.2rem;
            height: 2.2rem;
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            color: #FFFFFF;
        }
        .step-list li strong {
            display: block;
            color: var(--text-primary);
            margin-bottom: 0.3rem;
            font-size: 1.1rem;
        }
        .tag {
            display: inline-block;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            padding: 0.3rem 0.9rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .bullet-list {
            list-style: none;
        }
        .bullet-list li {
            padding-left: 1.8rem;
            position: relative;
            margin-bottom: 0.8rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .bullet-list li::before {
            content: '\f058';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 2px;
            color: var(--accent-cyan);
            font-size: 0.9rem;
        }
        .cta-section {
            background: linear-gradient(135deg, #0D111E, #0A1A30);
            padding: 80px 0;
            text-align: center;
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .cta-box {
            max-width: 600px;
            margin: 0 auto;
        }
        /* FAQ */
        .faq-list {
            max-width: 800px;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-subtle);
            padding: 1.5rem 0;
        }
        .faq-question {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 0.8rem;
            cursor: pointer;
            color: var(--text-primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-question i {
            transition: transform 0.3s ease;
            color: var(--accent-cyan);
        }
        .faq-answer {
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
            font-size: 0.95rem;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        /* Footer */
        .footer {
            background: var(--bg-secondary);
            padding: 60px 0 30px;
            border-top: 1px solid var(--border-subtle);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 3rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-family: var(--font-heading);
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 1.2rem;
            color: var(--text-primary);
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 0.6rem;
        }
        .footer-col ul li a {
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: color 0.2s ease;
        }
        .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;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        /* FAB */
        .fab-float {
            position: fixed;
            left: 1.5rem;
            bottom: 5rem;
            z-index: 50;
            width: 52px;
            height: 52px;
            border-radius: 50px;
            background: rgba(0, 0, 0, 0.75);
            backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(0,0,0,0.75), rgba(0,0,0,0.75)), linear-gradient(135deg, #00F0FF, #0052FF);
            background-origin: border-box;
            background-clip: content-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            box-shadow: 0 0 18px rgba(0,240,255,0.45);
            transition: all 0.3s ease;
            cursor: pointer;
            animation: floatPulse 3s infinite;
        }
        .fab-float:hover {
            box-shadow: 0 0 30px rgba(0,240,255,0.7);
            transform: scale(1.1);
        }
        @keyframes floatPulse {
            0%,100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }
        .fab-badge {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 14px;
            height: 14px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid #000;
            animation: blinkBadge 1.2s infinite;
        }
        @keyframes blinkBadge {
            0%,100% { opacity: 1; }
            50% { opacity: 0.3; }
        }
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .grid-2, .grid-3, .grid-4 {
                grid-template-columns: 1fr;
            }
            .feature-row, .feature-row.reverse {
                flex-direction: column;
            }
            .hero-title {
                font-size: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 640px) {
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-subtitle, .section-desc {
                font-size: 0.95rem;
            }
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .hero-icons {
                flex-direction: column;
                gap: 1rem;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-subtle: rgba(0, 240, 255, 0.2);
            --border-glow: rgba(0, 240, 255, 0.6);
            --gradient-hero: linear-gradient(135deg, #08090F 0%, #0D111E 50%, #0A1A30 100%);
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --font-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

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

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

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

        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* Navigation */
        .nav-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background 0.3s ease;
        }

        .nav-header.scrolled {
            background: rgba(8, 9, 15, 0.95);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .nav-logo {
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            background: linear-gradient(135deg, #FFFFFF, #00F0FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 0.3rem 0;
            transition: color 0.2s ease;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-cyan);
            transition: width 0.3s ease;
            border-radius: 2px;
        }

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

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .btn-login {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 0.5rem 1.2rem;
            border-radius: 8px;
            transition: all 0.2s ease;
            border: 1px solid transparent;
        }

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

        .btn-signup {
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 0.55rem 1.5rem;
            border-radius: 8px;
            transition: all 0.3s ease;
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.3);
        }

        .btn-signup:hover {
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.55);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            color: var(--text-primary);
            font-size: 1.8rem;
            padding: 0.3rem;
            border-radius: 6px;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(8, 9, 15, 0.98);
            backdrop-filter: blur(20px);
            z-index: 99;
            flex-direction: column;
            padding: 2rem 1.5rem;
            gap: 1.5rem;
            overflow-y: auto;
        }

        .mobile-menu.active {
            display: flex;
        }

        .mobile-menu a {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-primary);
            padding: 0.8rem 1rem;
            border-radius: 8px;
            transition: background 0.2s;
            display: block;
        }

        .mobile-menu a:hover {
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
        }

        /* Hero Section */
        .hero-section {
            padding: 140px 0 80px;
            background: var(--gradient-hero);
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-title {
            font-family: var(--font-heading);
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1.5rem;
            background: linear-gradient(135deg, #FFFFFF 0%, #00F0FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 2.5rem;
        }

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

        .btn-primary {
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 1.05rem;
            padding: 0.85rem 2.2rem;
            border-radius: 10px;
            transition: all 0.3s ease;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
        }

        .btn-primary:hover {
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.65);
            transform: translateY(-2px);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.85rem 2.2rem;
            border-radius: 10px;
            border: 1px solid var(--border-subtle);
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
        }

        .btn-secondary:hover {
            border-color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
        }

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

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

        /* Section Styles */
        .section {
            padding: 80px 0;
            position: relative;
        }

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

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

        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.1em;
            background: rgba(0, 240, 255, 0.1);
            padding: 0.4rem 1.2rem;
            border-radius: 20px;
            margin-bottom: 1rem;
        }

        .section-title {
            font-family: var(--font-heading);
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .section-desc {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* Tips Cards */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        .tip-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2.5rem 2rem;
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
            position: relative;
            overflow: hidden;
        }

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

        .tip-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 8px 32px rgba(0, 240, 255, 0.15);
            transform: translateY(-4px);
        }

        .tip-icon {
            font-size: 2.5rem;
            color: var(--accent-cyan);
            margin-bottom: 1.5rem;
            display: inline-block;
            text-shadow: 0 0 15px var(--accent-glow);
        }

        .tip-card h3 {
            font-family: var(--font-heading);
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            color: var(--text-primary);
        }

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

        .tip-number {
            position: absolute;
            top: 1.5rem;
            right: 1.5rem;
            font-size: 3.5rem;
            font-weight: 900;
            color: rgba(0, 240, 255, 0.06);
            line-height: 1;
            pointer-events: none;
        }

        /* How-To Section */
        .steps-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .step-item {
            display: flex;
            gap: 2rem;
            margin-bottom: 2.5rem;
            position: relative;
        }

        .step-number {
            flex-shrink: 0;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.3rem;
            color: #FFFFFF;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
        }

        .step-content {
            flex: 1;
        }

        .step-content h3 {
            font-family: var(--font-heading);
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }

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

        /* Featured Block */
        .featured-block {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 3rem;
            backdrop-filter: blur(10px);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.1);
            margin: 3rem 0;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }

        .featured-block img {
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
        }

        .featured-content h3 {
            font-family: var(--font-heading);
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .featured-content p {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 1.5rem;
        }

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

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

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

        .faq-question {
            padding: 1.5rem 2rem;
            font-family: var(--font-heading);
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: color 0.2s;
        }

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

        .faq-answer {
            padding: 0 2rem 1.5rem;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }

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

        .faq-icon {
            font-size: 1.2rem;
            transition: transform 0.3s ease;
            color: var(--accent-cyan);
        }

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

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.15), rgba(0, 240, 255, 0.1));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 4rem 3rem;
            text-align: center;
            backdrop-filter: blur(10px);
        }

        .cta-section h2 {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

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

        /* Footer */
        .footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 3rem 0 1.5rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }

        .footer-logo {
            font-family: var(--font-heading);
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, #FFFFFF, #00F0FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .footer-col h4 {
            font-family: var(--font-heading);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 1.2rem;
            color: var(--text-primary);
        }

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

        .footer-col ul li {
            margin-bottom: 0.7rem;
        }

        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color 0.2s;
        }

        .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;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Floating Action Button */
        .fab-widget {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 50;
            width: 56px;
            height: 56px;
            background: rgba(8, 9, 15, 0.7);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            border-image: linear-gradient(135deg, #00F0FF, #0052FF) 1;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent-cyan);
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
            animation: floatFab 3s ease-in-out infinite;
        }

        .fab-widget:hover {
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.7);
            transform: scale(1.1);
            border-image: linear-gradient(135deg, #FF007F, #FFFF00) 1;
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 2.5rem;
                text-align: center;
            }
            .hero-buttons {
                justify-content: center;
            }
            .hero-visual {
                order: -1;
            }
            .hero-title {
                font-size: 2.4rem;
            }
            .featured-block {
                grid-template-columns: 1fr;
                padding: 2rem;
            }
            .nav-links {
                gap: 1.2rem;
            }
            .nav-links a {
                font-size: 0.85rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-actions .btn-login {
                display: none;
            }
            .hero-section {
                padding: 120px 0 60px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .tips-grid {
                grid-template-columns: 1fr;
            }
            .cta-section {
                padding: 2.5rem 1.5rem;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .fab-widget {
                width: 48px;
                height: 48px;
                font-size: 1.3rem;
                left: 1rem;
                bottom: 5rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .btn-primary, .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .step-item {
                flex-direction: column;
                gap: 1rem;
                text-align: center;
            }
            .step-number {
                margin: 0 auto;
            }
        }