/* roulang page: index */
:root {
            --primary-bg: #0B1A30;
            --secondary-bg: #0F0C20;
            --surface: #111827;
            --surface-light: #1A2332;
            --accent-cyan: #00F0FF;
            --accent-lime: #CCFF00;
            --accent-purple: #7C3AED;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --text-muted: #6B7280;
            --border-neon: rgba(0, 240, 255, 0.3);
            --border-lime: rgba(204, 255, 0, 0.4);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-lime: 0 0 15px rgba(204, 255, 0, 0.3);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Be Vietnam Pro', sans-serif;
            background: var(--secondary-bg);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

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

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

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

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 12, 32, 0.95);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            padding: 16px 0;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .logo {
            font-size: 20px;
            font-weight: 900;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo i {
            color: var(--accent-cyan);
            font-size: 24px;
        }

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

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .main-nav a {
            padding: 10px 16px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            position: relative;
            transition: var(--transition);
            white-space: nowrap;
        }

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

        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .auth-buttons {
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }

        .btn-login {
            background: transparent;
            color: var(--text-primary);
            font-size: 14px;
            font-weight: 600;
            padding: 10px 16px;
            border-radius: 50px;
            transition: var(--transition);
        }

        .btn-login:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
            color: var(--secondary-bg);
            font-size: 14px;
            font-weight: 700;
            padding: 10px 20px;
            border-radius: 50px;
            box-shadow: var(--shadow-neon);
            transition: var(--transition);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
        }

        .mobile-menu-toggle {
            display: none;
            background: transparent;
            color: var(--text-primary);
            font-size: 24px;
            padding: 8px;
        }

        /* Hero */
        .hero {
            padding: 140px 0 80px;
            background: linear-gradient(180deg, var(--secondary-bg) 0%, var(--primary-bg) 100%);
            position: relative;
            overflow: hidden;
        }

        .hero::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%);
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(204, 255, 0, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 60px;
            align-items: center;
        }

        .hero-content {
            max-width: 600px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-neon);
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            margin-bottom: 24px;
        }

        .hero-badge i {
            font-size: 14px;
        }

        .hero h1 {
            font-size: 52px;
            font-weight: 900;
            line-height: 1.15;
            margin-bottom: 24px;
            letter-spacing: -1px;
            background: linear-gradient(135deg, #FFFFFF 0%, #CCFF00 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero p {
            font-size: 18px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            line-height: 1.7;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-cyan), #00B4D8);
            color: var(--secondary-bg);
            font-size: 16px;
            font-weight: 700;
            padding: 14px 28px;
            border-radius: 50px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            box-shadow: var(--shadow-neon);
            transition: var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.8);
        }

        .btn-secondary {
            background: transparent;
            color: var(--text-primary);
            font-size: 16px;
            font-weight: 600;
            padding: 14px 28px;
            border-radius: 50px;
            border: 1px solid var(--border-neon);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }

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

        .hero-stats {
            display: flex;
            gap: 32px;
        }

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

        .hero-stat-number {
            font-size: 28px;
            font-weight: 900;
            color: var(--accent-lime);
        }

        .hero-stat-label {
            font-size: 13px;
            color: var(--text-muted);
        }

        .hero-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-neon);
            border: 1px solid var(--border-neon);
            background: rgba(15, 12, 32, 0.8);
            backdrop-filter: blur(20px);
            padding: 20px;
        }

        .hero-visual img {
            border-radius: var(--radius-md);
            width: 100%;
            height: 400px;
            object-fit: cover;
        }

        .hero-visual-overlay {
            position: absolute;
            bottom: 20px;
            left: 20px;
            right: 20px;
            background: rgba(15, 12, 32, 0.9);
            backdrop-filter: blur(10px);
            border-radius: var(--radius-md);
            padding: 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }

        .hero-visual-overlay span {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
        }

        .hero-visual-overlay .live-dot {
            width: 8px;
            height: 8px;
            background: #22C55E;
            border-radius: 50%;
            animation: pulse 2s infinite;
        }

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

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

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

        .section-header h2 {
            font-size: 36px;
            font-weight: 900;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 700px;
        }

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

        .feature-card {
            background: var(--surface);
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-md);
            padding: 32px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

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

        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-neon);
            border-color: var(--accent-cyan);
        }

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

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

        .feature-icon i {
            font-size: 24px;
            color: var(--accent-cyan);
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }

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

        /* Step Timeline */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 24px;
        }

        .step-card {
            background: transparent;
            border: 1px solid rgba(204, 255, 0, 0.3);
            border-radius: var(--radius-md);
            padding: 28px;
            position: relative;
            transition: var(--transition);
        }

        .step-card:hover {
            border-color: var(--accent-lime);
            box-shadow: var(--shadow-lime);
        }

        .step-number {
            font-size: 48px;
            font-weight: 900;
            color: rgba(204, 255, 0, 0.3);
            margin-bottom: 12px;
            line-height: 1;
        }

        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-secondary);
        }

        /* Hot List */
        .hot-list {
            background: var(--surface);
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }

        .hot-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 20px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            transition: var(--transition);
        }

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

        .hot-item:hover {
            background: rgba(0, 240, 255, 0.05);
        }

        .hot-rank {
            font-size: 24px;
            font-weight: 900;
            color: var(--accent-lime);
            min-width: 40px;
        }

        .hot-info {
            flex: 1;
        }

        .hot-info h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .hot-info p {
            font-size: 13px;
            color: var(--text-secondary);
        }

        .hot-cta {
            color: var(--accent-cyan);
            font-size: 13px;
            font-weight: 600;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* Content List */
        .content-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 32px;
        }

        .content-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .content-item {
            display: flex;
            gap: 16px;
            padding: 16px;
            background: var(--surface);
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
            transition: var(--transition);
        }

        .content-item:hover {
            border-color: var(--border-neon);
            transform: translateX(5px);
        }

        .content-item i {
            color: var(--accent-cyan);
            font-size: 18px;
            margin-top: 4px;
        }

        .content-item h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .content-item p {
            font-size: 13px;
            color: var(--text-secondary);
        }

        .content-sidebar {
            background: var(--surface);
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-md);
            padding: 24px;
        }

        .content-sidebar h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--accent-cyan);
        }

        .sidebar-item {
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

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

        .sidebar-item a {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            transition: var(--transition);
        }

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

        /* FAQ */
        .faq-grid {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 800px;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-question {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 700;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            transition: var(--transition);
        }

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

        .faq-question i {
            transition: var(--transition);
        }

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

        .faq-answer {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }

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

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-bg), var(--secondary-bg));
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-lg);
            padding: 60px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.15) 0%, transparent 70%);
        }

        .cta-section h2 {
            font-size: 32px;
            font-weight: 900;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            position: relative;
            z-index: 1;
        }

        /* Footer */
        .site-footer {
            background: rgba(15, 12, 32, 0.8);
            border-top: 1px solid var(--border-neon);
            padding: 60px 0 30px;
            margin-top: 80px;
        }

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

        .footer-brand {
            max-width: 300px;
        }

        .footer-brand .logo {
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

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

        .footer-column a {
            display: block;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 10px;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        .footer-bottom p {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            background: rgba(15, 12, 32, 0.6);
            backdrop-filter: blur(10px);
            border: 2px solid transparent;
            border-image: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan)) 1;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 24px;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            transition: var(--transition);
            opacity: 0.6;
            animation: fabFloat 3s ease-in-out infinite;
        }

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

        .fab .notification-dot {
            position: absolute;
            top: 4px;
            right: 4px;
            width: 10px;
            height: 10px;
            background: #EF4444;
            border-radius: 50%;
            animation: blink 1.5s infinite;
        }

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

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

        /* Responsive */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero h1 {
                font-size: 40px;
            }

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

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

        @media (max-width: 768px) {
            .main-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(15, 12, 32, 0.98);
                flex-direction: column;
                padding: 16px;
                gap: 4px;
            }

            .main-nav.mobile-open {
                display: flex;
            }

            .mobile-menu-toggle {
                display: block;
            }

            .hero {
                padding: 120px 0 60px;
            }

            .hero h1 {
                font-size: 32px;
            }

            .hero p {
                font-size: 16px;
            }

            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }

            .section {
                padding: 60px 0;
            }

            .section-header h2 {
                font-size: 28px;
            }

            .cta-section {
                padding: 40px 20px;
            }

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

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

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

            .logo {
                font-size: 16px;
            }

            .btn-signup {
                padding: 8px 14px;
                font-size: 12px;
            }

            .btn-login {
                padding: 8px 12px;
                font-size: 12px;
            }

            .hero h1 {
                font-size: 28px;
            }

            .hero-actions {
                flex-direction: column;
            }

            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }

            .feature-card {
                padding: 24px;
            }

            .hot-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #0F0C20;
            --bg-secondary: #0B1A30;
            --bg-card: #151233;
            --accent-lime: #CCFF00;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --text-muted: #6B7280;
            --border-neon: rgba(0, 240, 255, 0.3);
            --border-lime: rgba(204, 255, 0, 0.4);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-neon: 0 0 20px rgba(0, 240, 255, 0.15);
            --shadow-lime: 0 0 15px rgba(204, 255, 0, 0.2);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-main: 'Segoe UI', 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
            color: var(--text-white);
            line-height: 1.65;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 24px;
            max-width: 1400px;
            margin: 0 auto;
            gap: 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--text-white);
            white-space: nowrap;
            transition: var(--transition);
        }

        .logo i {
            color: var(--accent-cyan);
            font-size: 1.6rem;
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.5));
        }

        .logo span {
            background: linear-gradient(135deg, var(--text-white) 40%, var(--accent-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .main-nav a {
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-silver);
            border: 1px solid transparent;
            transition: var(--transition);
            position: relative;
        }

        .main-nav a:hover {
            color: var(--text-white);
            background: rgba(0, 240, 255, 0.08);
            border-color: rgba(0, 240, 255, 0.2);
        }

        .main-nav a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.12);
            border-color: rgba(0, 240, 255, 0.35);
            font-weight: 600;
        }

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

        .btn-login {
            padding: 9px 20px;
            border-radius: 22px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: var(--text-white);
            font-weight: 600;
            font-size: 0.88rem;
            cursor: pointer;
            transition: var(--transition);
        }

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

        .btn-signup {
            padding: 9px 22px;
            border-radius: 22px;
            background: linear-gradient(135deg, var(--accent-lime), #99CC00);
            border: none;
            color: #0F0C20;
            font-weight: 700;
            font-size: 0.88rem;
            cursor: pointer;
            box-shadow: 0 4px 15px rgba(204, 255, 0, 0.3);
            transition: var(--transition);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(204, 255, 0, 0.45);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--accent-cyan);
            font-size: 1.3rem;
            padding: 8px 12px;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(0, 240, 255, 0.1);
        }

        /* Article Layout */
        .article-page {
            padding: 48px 0 64px;
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 24px;
            font-size: 0.85rem;
            color: var(--text-silver);
            flex-wrap: wrap;
        }

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

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

        .article-breadcrumb span {
            color: var(--text-muted);
        }

        .article-header {
            margin-bottom: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
        }

        .article-header h1 {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--text-white) 30%, var(--accent-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.88rem;
            color: var(--text-silver);
        }

        .article-meta i {
            color: var(--accent-cyan);
            margin-right: 6px;
        }

        .article-tags {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 16px;
        }

        .article-tags .tag {
            padding: 6px 16px;
            border-radius: 16px;
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid rgba(0, 240, 255, 0.25);
            font-size: 0.8rem;
            color: var(--accent-cyan);
            transition: var(--transition);
        }

        .article-tags .tag:hover {
            background: rgba(0, 240, 255, 0.15);
        }

        .article-featured-image {
            margin-bottom: 36px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            position: relative;
            border: 1px solid rgba(0, 240, 255, 0.2);
            box-shadow: var(--shadow-neon);
        }

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

        .article-content {
            max-width: 860px;
            margin: 0 auto;
            font-size: 1.05rem;
            line-height: 1.75;
            color: var(--text-silver);
        }

        .article-content p {
            margin-bottom: 20px;
        }

        .article-content h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 36px 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid rgba(0, 240, 255, 0.25);
        }

        .article-content h3 {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--accent-cyan);
            margin: 28px 0 12px;
        }

        .article-content ul,
        .article-content ol {
            margin: 16px 0 20px 24px;
        }

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

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

        .article-content a {
            color: var(--accent-cyan);
            border-bottom: 1px dashed var(--accent-cyan);
        }

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

        .article-content blockquote {
            border-left: 4px solid var(--accent-lime);
            padding: 16px 20px;
            background: rgba(204, 255, 0, 0.05);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 24px 0;
            font-style: italic;
            color: var(--text-white);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
            background: rgba(15, 12, 32, 0.6);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(0, 240, 255, 0.2);
        }

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

        .article-not-found h2 {
            font-size: 1.5rem;
            margin-bottom: 12px;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 28px;
            background: linear-gradient(135deg, var(--accent-lime), #99CC00);
            color: #0F0C20;
            font-weight: 700;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 20px rgba(204, 255, 0, 0.3);
            transition: var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(204, 255, 0, 0.5);
        }

        /* CTA Section */
        .cta-section {
            margin-top: 64px;
            padding: 56px 24px;
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(204, 255, 0, 0.06));
            border-radius: var(--radius-xl);
            border: 1px solid rgba(0, 240, 255, 0.25);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 60%);
            animation: ctaGlow 8s ease-in-out infinite;
        }

        @keyframes ctaGlow {
            0%, 100% { transform: translate(0, 0); }
            50% { transform: translate(5%, 5%); }
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
            position: relative;
        }

        .cta-section p {
            font-size: 1.1rem;
            color: var(--text-silver);
            margin-bottom: 28px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            position: relative;
        }

        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 28px;
            background: transparent;
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn-secondary:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: var(--shadow-neon);
            transform: translateY(-3px);
        }

        /* FAB */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(15, 12, 32, 0.85), rgba(15, 12, 32, 0.85)), linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
            transition: var(--transition);
            animation: fabFloat 3s ease-in-out infinite;
            opacity: 0.75;
        }

        .fab-support i {
            color: var(--accent-cyan);
            font-size: 1.3rem;
            filter: drop-shadow(0 0 6px rgba(0, 240, 255, 0.6));
        }

        .fab-support:hover {
            transform: scale(1.15);
            opacity: 1;
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.55);
            animation-play-state: paused;
        }

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

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

        .fab-support::after {
            content: '';
            position: absolute;
            top: 6px;
            right: 6px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #FF007F;
            animation: fabBlink 1.5s ease-in-out infinite;
        }

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

        /* Footer */
        .site-footer {
            background: rgba(11, 26, 48, 0.85);
            border-top: 1px solid rgba(0, 240, 255, 0.2);
            padding: 56px 0 24px;
            margin-top: 64px;
        }

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

        .footer-brand .logo {
            margin-bottom: 16px;
        }

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

        .footer-column h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 8px;
        }

        .footer-column h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .footer-column a {
            display: block;
            color: var(--text-silver);
            font-size: 0.9rem;
            margin-bottom: 10px;
            transition: var(--transition);
        }

        .footer-column a:hover {
            color: var(--accent-cyan);
            transform: translateX(4px);
        }

        .footer-column a i {
            margin-right: 8px;
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .footer-bottom p {
            margin-bottom: 6px;
        }

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

        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
                padding: 12px 16px;
            }

            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding-top: 12px;
                border-top: 1px solid rgba(0, 240, 255, 0.15);
            }

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

            .main-nav a {
                text-align: left;
                padding: 12px 16px;
                border-radius: 8px;
            }

            .nav-toggle {
                display: block;
            }

            .nav-actions {
                margin-left: auto;
            }

            .btn-login,
            .btn-signup {
                padding: 7px 14px;
                font-size: 0.8rem;
            }

            .article-page {
                padding: 32px 0 48px;
            }

            .article-header h1 {
                font-size: 1.6rem;
            }

            .article-content {
                font-size: 0.98rem;
            }

            .cta-section {
                padding: 40px 20px;
            }

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

            .fab-support {
                width: 46px;
                height: 46px;
                bottom: 80px;
                left: 12px;
            }
        }

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

            .logo {
                font-size: 1rem;
                gap: 8px;
            }

            .logo i {
                font-size: 1.3rem;
            }

            .nav-actions {
                gap: 6px;
            }

            .btn-login,
            .btn-signup {
                padding: 6px 10px;
                font-size: 0.75rem;
            }

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

            .article-meta {
                gap: 12px;
                font-size: 0.8rem;
            }

            .article-tags .tag {
                font-size: 0.72rem;
                padding: 4px 12px;
            }

            .cta-actions {
                flex-direction: column;
                align-items: center;
            }

            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0F0C20;
            --bg-secondary: #0B1A30;
            --bg-card: #14122A;
            --bg-card-hover: #1A1735;
            --accent-primary: #CCFF00;
            --accent-secondary: #00F0FF;
            --accent-warning: #FF007F;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --text-muted: #6B7280;
            --border-color: rgba(204, 255, 0, 0.2);
            --border-hover: rgba(204, 255, 0, 0.6);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
            --shadow-neon: 0 0 20px rgba(0, 240, 255, 0.3);
            --shadow-lime: 0 0 20px rgba(204, 255, 0, 0.3);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --spacing-xxl: 96px;
            --font-primary: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', Arial, sans-serif;
            --font-weight-normal: 400;
            --font-weight-medium: 500;
            --font-weight-semibold: 600;
            --font-weight-bold: 700;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.5s ease;
        }

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

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

        body {
            font-family: var(--font-primary);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            font-size: 16px;
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            width: 100%;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(204, 255, 0, 0.1);
            padding: var(--spacing-sm) 0;
            transition: all var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
            background: rgba(15, 12, 32, 0.98);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
            font-weight: var(--font-weight-bold);
            font-size: 1.1rem;
            color: var(--text-primary);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo i {
            color: var(--accent-primary);
            font-size: 1.4rem;
            filter: drop-shadow(0 0 8px rgba(204, 255, 0, 0.5));
        }

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

        .main-nav {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }

        .main-nav a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: var(--font-weight-medium);
            padding: 8px 16px;
            border-radius: 20px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .main-nav a:hover {
            color: var(--text-primary);
            background: rgba(204, 255, 0, 0.1);
        }

        .main-nav a.active {
            color: var(--accent-primary);
            background: rgba(204, 255, 0, 0.15);
            box-shadow: 0 0 12px rgba(204, 255, 0, 0.2);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
            flex-shrink: 0;
        }

        .btn-login {
            color: var(--text-secondary);
            font-weight: var(--font-weight-medium);
            font-size: 0.9rem;
            padding: 8px 16px;
            border-radius: 20px;
            transition: all var(--transition-fast);
        }

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

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-primary), #B3E600);
            color: #0F0C20;
            font-weight: var(--font-weight-bold);
            font-size: 0.9rem;
            padding: 10px 20px;
            border-radius: 24px;
            box-shadow: 0 4px 16px rgba(204, 255, 0, 0.3);
            transition: all var(--transition-base);
        }

        .btn-signup:hover {
            box-shadow: 0 6px 24px rgba(204, 255, 0, 0.5);
            transform: translateY(-2px);
        }

        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 4px 8px;
        }

        /* Page Banner */
        .page-banner {
            padding: 140px 0 60px;
            background: linear-gradient(135deg, rgba(15, 12, 32, 0.95), rgba(11, 26, 48, 0.9)), url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            position: relative;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 30% 50%, rgba(204, 255, 0, 0.05), transparent 60%);
            pointer-events: none;
        }

        .banner-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
        }

        .banner-content h1 {
            font-size: 2.5rem;
            font-weight: var(--font-weight-bold);
            line-height: 1.2;
            margin-bottom: var(--spacing-sm);
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .banner-content p {
            color: var(--text-secondary);
            font-size: 1.1rem;
            line-height: 1.6;
            max-width: 650px;
        }

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

        .content-section {
            margin-bottom: var(--spacing-xl);
        }

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

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

        .section-header h2 {
            font-size: 2rem;
            font-weight: var(--font-weight-bold);
            color: var(--text-primary);
            margin-bottom: var(--spacing-xs);
            line-height: 1.3;
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.6;
            max-width: 700px;
        }

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

        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

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

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

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

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(204, 255, 0, 0.1);
            color: var(--accent-primary);
            font-weight: var(--font-weight-bold);
            font-size: 1.2rem;
            margin-bottom: var(--spacing-sm);
            border: 1px solid rgba(204, 255, 0, 0.3);
        }

        .step-card h3 {
            font-size: 1.2rem;
            font-weight: var(--font-weight-semibold);
            margin-bottom: var(--spacing-xs);
            color: var(--text-primary);
        }

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

        /* Download CTA Section */
        .download-cta {
            background: linear-gradient(135deg, rgba(204, 255, 0, 0.08), rgba(0, 240, 255, 0.08));
            border: 1px solid rgba(204, 255, 0, 0.3);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .download-cta::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at center, rgba(204, 255, 0, 0.05), transparent 50%);
            animation: pulse-glow 4s ease-in-out infinite;
            pointer-events: none;
        }

        @keyframes pulse-glow {
            0%, 100% { transform: scale(1); opacity: 0.5; }
            50% { transform: scale(1.2); opacity: 1; }
        }

        .download-cta h2 {
            font-size: 2rem;
            font-weight: var(--font-weight-bold);
            margin-bottom: var(--spacing-sm);
            color: var(--text-primary);
            position: relative;
            z-index: 1;
        }

        .download-cta p {
            color: var(--text-secondary);
            font-size: 1.1rem;
            margin-bottom: var(--spacing-lg);
            position: relative;
            z-index: 1;
        }

        .download-buttons {
            display: flex;
            gap: var(--spacing-sm);
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .btn-download {
            display: inline-flex;
            align-items: center;
            gap: var(--spacing-xs);
            padding: 16px 32px;
            border-radius: 28px;
            font-weight: var(--font-weight-bold);
            font-size: 1rem;
            transition: all var(--transition-base);
            border: 2px solid transparent;
        }

        .btn-download i {
            font-size: 1.2rem;
        }

        .btn-download-apk {
            background: linear-gradient(135deg, var(--accent-primary), #B3E600);
            color: #0F0C20;
            box-shadow: 0 4px 20px rgba(204, 255, 0, 0.4);
        }

        .btn-download-apk:hover {
            box-shadow: 0 8px 32px rgba(204, 255, 0, 0.6);
            transform: translateY(-3px);
        }

        .btn-download-ios {
            background: transparent;
            color: var(--accent-secondary);
            border-color: var(--accent-secondary);
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.2);
        }

        .btn-download-ios:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 24px rgba(0, 240, 255, 0.4);
            transform: translateY(-3px);
        }

        /* Features Grid */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-md);
        }

        .feature-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            border: 1px solid transparent;
            transition: all var(--transition-base);
        }

        .feature-item:hover {
            border-color: var(--border-hover);
            background: var(--bg-card-hover);
        }

        .feature-item i {
            font-size: 2rem;
            color: var(--accent-secondary);
            margin-bottom: var(--spacing-sm);
            display: block;
        }

        .feature-item h3 {
            font-size: 1.1rem;
            font-weight: var(--font-weight-semibold);
            margin-bottom: var(--spacing-xs);
            color: var(--text-primary);
        }

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

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

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

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

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

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

        .faq-question .faq-icon {
            font-size: 0.9rem;
            color: var(--accent-primary);
            transition: transform var(--transition-base);
            flex-shrink: 0;
        }

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

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

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

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

        /* Floating Action Button */
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 500;
            width: 56px;
            height: 56px;
            border-radius: 28px;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all var(--transition-base);
            opacity: 0.6;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
            animation: float-breathing 3s ease-in-out infinite;
        }

        .fab-left i {
            color: var(--accent-primary);
            font-size: 1.5rem;
            filter: drop-shadow(0 0 6px rgba(204, 255, 0, 0.6));
        }

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

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

        .fab-left::after {
            content: '';
            position: absolute;
            top: 8px;
            right: 8px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-warning);
            animation: blink-dot 1.5s ease-in-out infinite;
        }

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

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

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(204, 255, 0, 0.15);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            margin-top: var(--spacing-xl);
        }

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

        .footer-brand .logo {
            margin-bottom: var(--spacing-sm);
        }

        .footer-brand p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            max-width: 350px;
        }

        .footer-column h3 {
            font-size: 1rem;
            font-weight: var(--font-weight-semibold);
            color: var(--text-primary);
            margin-bottom: var(--spacing-sm);
        }

        .footer-column a {
            display: block;
            color: var(--text-secondary);
            font-size: 0.9rem;
            padding: 6px 0;
            transition: all var(--transition-fast);
        }

        .footer-column a:hover {
            color: var(--accent-primary);
            padding-left: 4px;
        }

        .footer-column a i {
            margin-right: 6px;
            width: 16px;
        }

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

        .footer-bottom p {
            color: var(--text-muted);
            font-size: 0.85rem;
            margin-bottom: 4px;
        }

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

            .banner-content h1 {
                font-size: 2rem;
            }
        }

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

            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding: var(--spacing-sm) 0;
                gap: 4px;
            }

            .main-nav.mobile-open {
                display: flex;
            }

            .main-nav a {
                padding: 12px 16px;
                border-radius: 8px;
                text-align: left;
            }

            .header-inner {
                flex-wrap: wrap;
            }

            .header-actions {
                margin-left: auto;
            }

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

            .banner-content h1 {
                font-size: 1.6rem;
            }

            .section-header h2 {
                font-size: 1.5rem;
            }

            .download-cta {
                padding: var(--spacing-lg);
            }

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

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

            .btn-download {
                width: 100%;
                justify-content: center;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }

            .fab-left {
                left: 12px;
                bottom: 80px;
                width: 48px;
                height: 48px;
                border-radius: 24px;
            }

            .fab-left i {
                font-size: 1.2rem;
            }
        }

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

            .banner-content h1 {
                font-size: 1.4rem;
            }

            .banner-content p {
                font-size: 0.95rem;
            }

            .section-header h2 {
                font-size: 1.3rem;
            }

            .step-card {
                padding: var(--spacing-md);
            }

            .download-cta h2 {
                font-size: 1.3rem;
            }

            .header-actions .btn-login {
                padding: 8px 12px;
                font-size: 0.85rem;
            }

            .header-actions .btn-signup {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0F0C20;
            --bg-secondary: #0B1A30;
            --bg-card: #1A1A3E;
            --accent-lime: #CCFF00;
            --accent-cyan: #00F0FF;
            --accent-pink: #FF007F;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --text-muted: #7A7E85;
            --border-neon: rgba(0, 240, 255, 0.3);
            --border-lime: rgba(204, 255, 0, 0.4);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-lime: 0 0 15px rgba(204, 255, 0, 0.4);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --spacing-xxl: 80px;
            --font-primary: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-med: 0.35s ease;
            --transition-slow: 0.5s ease;
        }

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

        body {
            font-family: var(--font-primary);
            background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            color: var(--text-white);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        /* ===== HEADER / NAV ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-neon);
            padding: var(--spacing-sm) 0;
            transition: background var(--transition-med), box-shadow var(--transition-med);
        }

        .site-header.scrolled {
            background: rgba(15, 12, 32, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
            font-weight: 800;
            font-size: 1.15rem;
            letter-spacing: 0.5px;
            color: var(--text-white);
            white-space: nowrap;
        }

        .logo i {
            color: var(--accent-cyan);
            font-size: 1.4rem;
            filter: drop-shadow(0 0 6px rgba(0, 240, 255, 0.6));
        }

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

        .main-nav {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }

        .main-nav a {
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-silver);
            transition: all var(--transition-fast);
            position: relative;
        }

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

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
        }

        .btn-login {
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-white);
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

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

        .btn-signup {
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--bg-primary);
            background: linear-gradient(135deg, var(--accent-lime) 0%, var(--accent-cyan) 100%);
            box-shadow: 0 0 20px rgba(204, 255, 0, 0.3);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

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

        /* ===== PAGE BANNER ===== */
        .page-banner {
            position: relative;
            padding: 140px 0 80px;
            background: linear-gradient(135deg, rgba(11, 26, 48, 0.9) 0%, rgba(15, 12, 32, 0.95) 100%);
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            border-bottom: 1px solid var(--border-neon);
            text-align: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.08) 0%, rgba(204, 255, 0, 0.05) 100%);
            pointer-events: none;
        }

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

        .banner-badge {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 50px;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid var(--border-neon);
            color: var(--accent-cyan);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: var(--spacing-md);
            animation: pulse-glow 2s infinite;
        }

        @keyframes pulse-glow {
            0%, 100% { box-shadow: 0 0 10px rgba(0, 240, 255, 0.3); }
            50% { box-shadow: 0 0 25px rgba(0, 240, 255, 0.6); }
        }

        .page-banner h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: var(--spacing-md);
            background: linear-gradient(135deg, var(--text-white) 0%, var(--accent-lime) 50%, var(--accent-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-banner p {
            font-size: 1.15rem;
            color: var(--text-silver);
            max-width: 750px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* ===== MAIN CONTENT ===== */
        .main-content {
            padding: var(--spacing-xl) 0;
            min-height: 50vh;
        }

        .content-section {
            margin-bottom: var(--spacing-xl);
        }

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

        .section-title {
            font-size: clamp(1.5rem, 3vw, 2.2rem);
            font-weight: 800;
            margin-bottom: var(--spacing-md);
            color: var(--text-white);
            position: relative;
            padding-left: 20px;
            line-height: 1.3;
        }

        .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 70%;
            background: linear-gradient(180deg, var(--accent-lime) 0%, var(--accent-cyan) 100%);
            border-radius: 2px;
            box-shadow: var(--shadow-neon);
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-silver);
            margin-bottom: var(--spacing-lg);
            line-height: 1.7;
            max-width: 800px;
        }

        /* ===== TIPS GRID ===== */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--spacing-md);
            margin-top: var(--spacing-lg);
        }

        .tip-card {
            background: var(--bg-card);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            transition: all var(--transition-med);
            position: relative;
            overflow: hidden;
        }

        .tip-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-lime) 0%, var(--accent-cyan) 100%);
            opacity: 0;
            transition: opacity var(--transition-med);
        }

        .tip-card:hover {
            border-color: var(--border-neon);
            box-shadow: 0 8px 30px rgba(0, 240, 255, 0.15);
            transform: translateY(-4px);
        }

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

        .tip-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(0, 240, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: var(--spacing-sm);
            font-size: 1.4rem;
            color: var(--accent-cyan);
            transition: all var(--transition-fast);
        }

        .tip-card:hover .tip-icon {
            background: rgba(204, 255, 0, 0.15);
            color: var(--accent-lime);
            box-shadow: var(--shadow-lime);
        }

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

        .tip-card p {
            font-size: 0.92rem;
            color: var(--text-silver);
            line-height: 1.6;
        }

        /* ===== FEATURE LIST ===== */
        .feature-list {
            list-style: none;
            padding: 0;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-sm);
            margin-top: var(--spacing-md);
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: var(--spacing-xs);
            padding: var(--spacing-sm);
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-sm);
            border-left: 3px solid var(--accent-lime);
            font-size: 0.95rem;
            color: var(--text-silver);
            line-height: 1.5;
        }

        .feature-list li i {
            color: var(--accent-lime);
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* ===== IMAGE BLOCK ===== */
        .image-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-lg);
            align-items: center;
            margin: var(--spacing-lg) 0;
        }

        .image-block .image-wrapper {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-neon);
            box-shadow: 0 10px 40px rgba(0, 240, 255, 0.15);
        }

        .image-block .image-wrapper img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        .image-block .text-content h3 {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: var(--spacing-sm);
            color: var(--text-white);
        }

        .image-block .text-content p {
            font-size: 0.98rem;
            color: var(--text-silver);
            line-height: 1.7;
            margin-bottom: var(--spacing-sm);
        }

        /* ===== STATS ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: var(--spacing-md);
            margin: var(--spacing-lg) 0;
        }

        .stat-item {
            text-align: center;
            padding: var(--spacing-md);
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid rgba(0, 240, 255, 0.12);
            transition: all var(--transition-med);
        }

        .stat-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-neon);
            transform: translateY(-3px);
        }

        .stat-number {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--accent-lime);
            display: block;
            margin-bottom: 4px;
            text-shadow: 0 0 20px rgba(204, 255, 0, 0.4);
        }

        .stat-label {
            font-size: 0.85rem;
            color: var(--text-silver);
            font-weight: 500;
        }

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

        .faq-item {
            background: var(--bg-card);
            border: 1px solid rgba(0, 240, 255, 0.12);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-med);
        }

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

        .faq-question {
            padding: var(--spacing-md);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-white);
            user-select: none;
            transition: all var(--transition-fast);
        }

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

        .faq-question i {
            color: var(--accent-cyan);
            transition: transform var(--transition-med);
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 var(--spacing-md);
            font-size: 0.95rem;
            color: var(--text-silver);
            line-height: 1.7;
        }

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

        /* ===== CTA SECTION ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.08) 0%, rgba(204, 255, 0, 0.06) 100%);
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            text-align: center;
            margin-top: var(--spacing-xl);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.06) 0%, transparent 60%);
            animation: rotate-bg 12s linear infinite;
            pointer-events: none;
        }

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

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

        .cta-section h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 900;
            margin-bottom: var(--spacing-sm);
            color: var(--text-white);
        }

        .cta-section p {
            font-size: 1.05rem;
            color: var(--text-silver);
            max-width: 600px;
            margin: 0 auto var(--spacing-lg);
            line-height: 1.7;
        }

        .btn-primary {
            display: inline-block;
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--bg-primary);
            background: linear-gradient(135deg, var(--accent-lime) 0%, var(--accent-cyan) 100%);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.3);
            transition: all var(--transition-med);
            letter-spacing: 0.5px;
        }

        .btn-primary:hover {
            box-shadow: 0 0 45px rgba(204, 255, 0, 0.5);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
        }

        /* ===== FLOATING ACTION BUTTON ===== */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 999;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            opacity: 0.6;
            transition: all var(--transition-med);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
            position: fixed;
        }

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

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

        .fab:active {
            transform: scale(0.95);
            box-shadow: 0 0 20px rgba(255, 0, 127, 0.6);
            color: var(--accent-pink);
        }

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

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

        /* ===== FOOTER ===== */
        .site-footer {
            background: rgba(11, 26, 48, 0.95);
            border-top: 1px solid var(--border-neon);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            margin-top: var(--spacing-xl);
        }

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

        .footer-brand .logo {
            margin-bottom: var(--spacing-sm);
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-silver);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-column h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: var(--spacing-sm);
            position: relative;
            padding-bottom: 8px;
        }

        .footer-column h3::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 30px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 1px;
        }

        .footer-column a {
            display: block;
            font-size: 0.9rem;
            color: var(--text-silver);
            padding: 4px 0;
            transition: all var(--transition-fast);
        }

        .footer-column a:hover {
            color: var(--accent-cyan);
            transform: translateX(4px);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: var(--spacing-md);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
        }

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

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

        @media (max-width: 768px) {
            .nav-container {
                flex-direction: column;
                align-items: flex-start;
                gap: var(--spacing-xs);
            }

            .main-nav {
                width: 100%;
                overflow-x: auto;
                flex-wrap: nowrap;
                -webkit-overflow-scrolling: touch;
                padding-bottom: 4px;
            }

            .main-nav a {
                white-space: nowrap;
                flex-shrink: 0;
            }

            .nav-actions {
                width: 100%;
                justify-content: flex-start;
            }

            .page-banner {
                padding: 120px 0 60px;
            }

            .image-block {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }

            .image-block .image-wrapper img {
                height: 240px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }

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

            .stats-row {
                grid-template-columns: 1fr 1fr;
            }
        }

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

            .page-banner h1 {
                font-size: 1.8rem;
            }

            .page-banner p {
                font-size: 0.95rem;
            }

            .section-title {
                font-size: 1.4rem;
                padding-left: 14px;
            }

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

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

            .stats-row {
                grid-template-columns: 1fr;
                gap: var(--spacing-sm);
            }

            .stat-number {
                font-size: 1.8rem;
            }

            .btn-primary {
                padding: 12px 28px;
                font-size: 0.95rem;
                width: 100%;
            }

            .fab {
                width: 44px;
                height: 44px;
                left: 10px;
                bottom: 80px;
                font-size: 1.2rem;
            }
        }

/* roulang page: category3 */
:root {
            --bg-deep: #08090F;
            --bg-panel: #0D111E;
            --bg-card: #121828;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-pink: #FF007F;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #8A94A6;
            --border-cyber: rgba(0, 240, 255, 0.25);
            --border-soft: rgba(203, 213, 225, 0.12);
            --glow-cyan: 0 0 15px rgba(0, 240, 255, 0.5);
            --glow-blue: 0 0 20px rgba(0, 82, 255, 0.4);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 10px;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.45);
            --font-body: 'Segoe UI', 'Roboto', system-ui, -apple-system, sans-serif;
        }

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

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease;
        }

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-soft);
            padding: 14px 0;
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.96);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .logo i {
            color: var(--accent-cyan);
            font-size: 1.8rem;
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.6));
        }

        .logo span {
            background: linear-gradient(135deg, #FFFFFF 0%, #CBD5E1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

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

        .main-nav a {
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.25s ease;
            position: relative;
            white-space: nowrap;
        }

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

        .main-nav a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.3);
        }

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

        .btn-login {
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-soft);
            transition: all 0.25s ease;
            white-space: nowrap;
        }

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

        .btn-signup {
            padding: 8px 22px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 700;
            color: #08090F;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            transition: all 0.25s ease;
            white-space: nowrap;
            box-shadow: var(--glow-cyan);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
            color: #08090F;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border-soft);
            color: var(--text-primary);
            font-size: 1.4rem;
            padding: 6px 14px;
            border-radius: 8px;
            cursor: pointer;
        }

        /* Hero Bento */
        .hero-bento {
            padding: 130px 0 80px;
            background: radial-gradient(ellipse at 30% 20%, rgba(0, 82, 255, 0.18) 0%, transparent 55%),
                        radial-gradient(ellipse at 70% 80%, rgba(0, 240, 255, 0.12) 0%, transparent 50%),
                        var(--bg-deep);
            position: relative;
            overflow: hidden;
        }

        .hero-bento::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-3.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            pointer-events: none;
        }

        .bento-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr;
            grid-template-rows: auto auto auto;
            gap: 20px;
            position: relative;
            z-index: 1;
        }

        .bento-main {
            grid-column: 1 / 2;
            grid-row: 1 / 4;
            background: rgba(13, 17, 30, 0.7);
            backdrop-filter: blur(10px);
            border: 1px solid var(--border-cyber);
            border-radius: var(--radius-lg);
            padding: 44px 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .bento-main::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -30%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.2) 0%, transparent 70%);
            pointer-events: none;
        }

        .bento-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 50px;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--accent-cyan);
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 22px;
            width: fit-content;
        }

        .bento-main h1 {
            font-size: 2.7rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 18px;
            background: linear-gradient(135deg, #FFFFFF 0%, #CBD5E1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .bento-main p {
            color: var(--text-secondary);
            font-size: 1.08rem;
            margin-bottom: 30px;
            max-width: 520px;
        }

        .bento-cta-row {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn-cyber-primary {
            padding: 14px 32px;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            color: #08090F;
            font-weight: 700;
            font-size: 1rem;
            border: none;
            transition: all 0.3s ease;
            box-shadow: var(--glow-cyan);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-cyber-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.75);
            color: #08090F;
        }

        .btn-cyber-secondary {
            padding: 14px 28px;
            border-radius: 50px;
            background: transparent;
            border: 1px solid var(--border-cyber);
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 1rem;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

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

        .bento-small {
            background: rgba(13, 17, 30, 0.7);
            backdrop-filter: blur(10px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 26px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .bento-small:hover {
            border-color: var(--border-cyber);
            box-shadow: var(--glow-cyan);
            transform: translateY(-3px);
        }

        .bento-small .icon-circle {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            margin-bottom: 14px;
        }

        .bento-small h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

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

        .bento-cta-bar {
            grid-column: 2 / 4;
            grid-row: 3 / 4;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.3), rgba(0, 240, 255, 0.2));
            border: 1px solid var(--border-cyber);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .bento-cta-bar span {
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
        }

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

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

        .section-header {
            margin-bottom: 48px;
            max-width: 680px;
        }

        .section-header.left {
            text-align: left;
        }

        .section-header h2 {
            font-size: 2.1rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 14px;
            background: linear-gradient(135deg, #FFFFFF 0%, #CBD5E1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 1.02rem;
        }

        .section-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.25);
            color: var(--accent-cyan);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        /* Tips list */
        .tips-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

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

        .tip-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(180deg, var(--accent-cyan), var(--accent-blue));
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .tip-item:hover {
            border-color: var(--border-cyber);
            box-shadow: var(--glow-blue);
            transform: translateY(-3px);
        }

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

        .tip-number {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: 1px;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .tip-number i {
            font-size: 1rem;
        }

        .tip-item h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .tip-item p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin: 0;
        }

        /* Weapon cards */
        .weapon-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 22px;
        }

        .weapon-card {
            background: var(--bg-card);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 26px;
            transition: all 0.3s ease;
            text-align: left;
        }

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

        .weapon-card .weapon-icon {
            font-size: 2rem;
            color: var(--accent-cyan);
            margin-bottom: 14px;
            display: block;
        }

        .weapon-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

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

        /* Stats */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
        }

        .stat-block {
            background: rgba(13, 17, 30, 0.6);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
            transition: all 0.3s ease;
        }

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

        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-cyan);
            margin-bottom: 6px;
        }

        .stat-label {
            color: var(--text-muted);
            font-size: 0.88rem;
            font-weight: 500;
        }

        /* Flow steps */
        .flow-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 30px;
        }

        .flow-step {
            background: var(--bg-card);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 28px;
            position: relative;
            transition: all 0.3s ease;
        }

        .flow-step:hover {
            border-color: var(--border-cyber);
            box-shadow: var(--glow-blue);
            transform: translateY(-3px);
        }

        .flow-step .step-num {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: 1px;
            margin-bottom: 12px;
            display: block;
        }

        .flow-step h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .flow-step p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            margin: 0;
        }

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

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: all 0.3s ease;
        }

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

        .faq-question {
            padding: 20px 26px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            user-select: none;
        }

        .faq-question .faq-toggle {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 0.9rem;
            transition: all 0.3s ease;
        }

        .faq-item.active .faq-toggle {
            transform: rotate(180deg);
            background: rgba(0, 240, 255, 0.2);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 26px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 26px 20px;
        }

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

        /* CTA Section */
        .cta-section {
            padding: 90px 0;
            background: radial-gradient(ellipse at 50% 50%, rgba(0, 82, 255, 0.2) 0%, transparent 60%),
                        var(--bg-deep);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.07;
            pointer-events: none;
        }

        .cta-inner {
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }

        .cta-inner h2 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #FFFFFF 0%, #CBD5E1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .cta-inner p {
            color: var(--text-secondary);
            font-size: 1.08rem;
            margin-bottom: 30px;
        }

        .btn-download-large {
            padding: 16px 40px;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            color: #08090F;
            font-weight: 800;
            font-size: 1.1rem;
            border: none;
            transition: all 0.3s ease;
            box-shadow: var(--glow-cyan);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-download-large:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.8);
            color: #08090F;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-panel);
            border-top: 1px solid var(--border-soft);
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            margin-bottom: 14px;
        }

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

        .footer-column h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .footer-column a {
            display: block;
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 10px;
            transition: all 0.25s ease;
        }

        .footer-column a:hover {
            color: var(--accent-cyan);
            transform: translateX(4px);
        }

        .footer-column a i {
            margin-right: 8px;
            color: var(--accent-cyan);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-soft);
            padding-top: 24px;
            text-align: center;
        }

        .footer-bottom p {
            color: var(--text-muted);
            font-size: 0.85rem;
            margin-bottom: 6px;
        }

        /* FAB */
        .fab-float {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1050;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), linear-gradient(135deg, #00F0FF, #0052FF);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: var(--glow-cyan);
            opacity: 0.6;
            animation: fabBreathe 3s ease-in-out infinite;
        }

        .fab-float:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
        }

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

        .fab-float .fab-notification {
            position: absolute;
            top: 4px;
            right: 4px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent-pink);
            box-shadow: 0 0 8px rgba(255, 0, 127, 0.8);
            animation: blinkDot 1.5s ease-in-out infinite;
        }

        @keyframes fabBreathe {
            0%, 100% { opacity: 0.6; }
            50% { opacity: 0.9; }
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .bento-grid {
                grid-template-columns: 1fr 1fr;
                grid-template-rows: auto auto auto;
            }
            .bento-main {
                grid-column: 1 / 3;
                grid-row: 1 / 2;
            }
            .bento-cta-bar {
                grid-column: 1 / 3;
                grid-row: 3 / 4;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                padding: 10px 0;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.98);
                border-bottom: 1px solid var(--border-soft);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px;
                gap: 6px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 16px;
                border-radius: 8px;
            }
            .nav-toggle {
                display: block;
            }
            .hero-bento {
                padding: 110px 0 60px;
            }
            .bento-main h1 {
                font-size: 2rem;
            }
            .bento-grid {
                grid-template-columns: 1fr;
                grid-template-rows: auto auto auto auto;
            }
            .bento-main {
                grid-column: 1 / 2;
                grid-row: 1 / 2;
            }
            .bento-cta-bar {
                grid-column: 1 / 2;
                grid-row: 4 / 5;
            }
            .tips-layout {
                grid-template-columns: 1fr;
            }
            .flow-steps {
                grid-template-columns: 1fr;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
            }
            .section {
                padding: 60px 0;
            }
            .section-header h2 {
                font-size: 1.7rem;
            }
            .cta-inner h2 {
                font-size: 1.9rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .nav-actions .btn-login {
                padding: 6px 14px;
                font-size: 0.82rem;
            }
            .nav-actions .btn-signup {
                padding: 6px 16px;
                font-size: 0.82rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .bento-main {
                padding: 30px 24px;
            }
            .bento-main h1 {
                font-size: 1.7rem;
            }
            .bento-main p {
                font-size: 0.95rem;
            }
            .btn-cyber-primary,
            .btn-cyber-secondary {
                padding: 12px 20px;
                font-size: 0.9rem;
                width: 100%;
                justify-content: center;
            }
            .bento-cta-row {
                flex-direction: column;
            }
            .bento-cta-bar {
                flex-direction: column;
                align-items: flex-start;
            }
            .stats-row {
                grid-template-columns: 1fr;
            }
            .weapon-grid {
                grid-template-columns: 1fr;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .cta-inner h2 {
                font-size: 1.6rem;
            }
            .btn-download-large {
                width: 100%;
                justify-content: center;
                padding: 14px 24px;
            }
            .logo span {
                font-size: 1rem;
            }
            .fab-float {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 12px;
                bottom: 80px;
            }
        }