/* roulang page: index */
:root {
            --bg-deep: #08090F;
            --bg-nav: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.75);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #94A3B8;
            --border-glow: #00F0FF;
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --glass-bg: rgba(13, 17, 30, 0.6);
            --glass-border: rgba(0, 240, 255, 0.15);
            --radius-lg: 1.25rem;
            --radius-md: 0.875rem;
            --radius-sm: 0.625rem;
            --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --spacing-section: 5rem;
            --container-max: 1280px;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-white);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image: radial-gradient(ellipse at 50% 0%, rgba(0, 82, 255, 0.08) 0%, transparent 70%);
            background-attachment: fixed;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all 0.25s ease;
        }
        ul {
            list-style: none;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border-width: 0;
        }
        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.8);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
            transition: background 0.3s ease;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 1.5rem;
        }
        .logo {
            font-weight: 700;
            font-size: 1.35rem;
            letter-spacing: -0.015em;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-shrink: 0;
        }
        .logo i {
            color: var(--accent-cyan);
            font-size: 1.6rem;
            filter: drop-shadow(0 0 6px rgba(0, 240, 255, 0.5));
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 2rem;
            font-weight: 500;
            font-size: 0.95rem;
        }
        .main-nav a {
            color: var(--text-silver);
            position: relative;
            padding: 0.35rem 0;
        }
        .main-nav a.active {
            color: var(--accent-cyan);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 2px;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after,
        .main-nav a.active::after {
            width: 100%;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }
        .btn-login {
            background: transparent;
            color: var(--text-white);
            padding: 0.55rem 1.3rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            border: 1px solid rgba(255,255,255,0.2);
        }
        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-blue), #0040CC);
            color: #fff;
            padding: 0.6rem 1.5rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.35);
            border: 1px solid transparent;
        }
        .btn-signup:hover {
            box-shadow: 0 6px 26px rgba(0, 240, 255, 0.4);
            transform: translateY(-1px);
            border-color: rgba(0, 240, 255, 0.4);
        }
        .mobile-menu-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-white);
            background: none;
            border: none;
            cursor: pointer;
        }
        /* Hero */
        .hero-section {
            padding: 9rem 0 5rem 0;
            position: relative;
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            opacity: 0.18;
            mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
            -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
        }
        .hero-grid {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .hero-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 1.5rem;
            letter-spacing: -0.025em;
            background: linear-gradient(135deg, #FFFFFF 0%, #CBD5E1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-content p {
            font-size: 1.125rem;
            color: var(--text-silver);
            line-height: 1.7;
            margin-bottom: 2rem;
            max-width: 540px;
        }
        .hero-cta-group {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            margin-bottom: 2rem;
        }
        .btn-primary {
            background: linear-gradient(135deg, #0052FF, #003ECB);
            color: #fff;
            padding: 0.85rem 2rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            box-shadow: 0 6px 24px rgba(0, 82, 255, 0.4);
            border: none;
            cursor: pointer;
            transition: all 0.25s ease;
        }
        .btn-primary:hover {
            box-shadow: 0 8px 32px rgba(0, 240, 255, 0.45);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: var(--accent-cyan);
            padding: 0.85rem 2rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: 1.5px solid var(--accent-cyan);
            transition: all 0.25s ease;
        }
        .btn-outline:hover {
            background: rgba(0, 240, 255, 0.08);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
        }
        .hero-stats {
            display: flex;
            gap: 2rem;
            flex-wrap: wrap;
        }
        .hero-stat-item {
            display: flex;
            flex-direction: column;
        }
        .hero-stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-cyan);
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .hero-visual {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-radius: var(--radius-lg);
            padding: 2rem;
            box-shadow: var(--shadow-card);
        }
        .hero-visual h3 {
            font-size: 1.25rem;
            margin-bottom: 1rem;
            color: var(--accent-cyan);
        }
        .hero-visual .step-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .hero-visual .step-item {
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            padding: 0.75rem;
            background: rgba(255,255,255,0.03);
            border-radius: var(--radius-sm);
            border-left: 3px solid var(--accent-blue);
        }
        .hero-visual .step-icon {
            font-size: 1.3rem;
            color: var(--accent-cyan);
            margin-top: 0.1rem;
        }
        .hero-visual .step-text strong {
            display: block;
            color: #fff;
        }
        .hero-visual .step-text span {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        /* Section common */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-label {
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            color: var(--accent-cyan);
            margin-bottom: 0.75rem;
            font-weight: 700;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 1rem;
            color: #fff;
        }
        .section-desc {
            color: var(--text-silver);
            font-size: 1.05rem;
            line-height: 1.7;
            margin-bottom: 2.5rem;
            max-width: 700px;
        }
        /* Kênh bán hàng (Channel Benefits) */
        .benefit-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
        }
        .benefit-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 2rem 1.75rem;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .benefit-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .benefit-card:hover {
            border-color: rgba(0, 240, 255, 0.4);
            transform: translateY(-6px);
            box-shadow: 0 16px 40px rgba(0,0,0,0.5);
        }
        .benefit-card:hover::before {
            opacity: 1;
        }
        .benefit-icon {
            font-size: 2.2rem;
            color: var(--accent-cyan);
            margin-bottom: 1rem;
            filter: drop-shadow(0 0 8px rgba(0,240,255,0.4));
        }
        .benefit-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
        }
        .benefit-card p {
            font-size: 0.925rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        /* Data strip */
        .data-strip {
            background: linear-gradient(135deg, rgba(0,82,255,0.1), rgba(0,240,255,0.06));
            border-top: 1px solid var(--glass-border);
            border-bottom: 1px solid var(--glass-border);
            padding: 2.5rem 0;
            text-align: center;
        }
        .data-strip-inner {
            display: flex;
            justify-content: center;
            gap: 3rem;
            flex-wrap: wrap;
        }
        .data-item {
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .data-number {
            font-size: 2.5rem;
            font-weight: 800;
            background: linear-gradient(180deg, #FFFFFF, #00F0FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .data-label {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-top: 0.25rem;
        }
        /* Lead form */
        .lead-form-section {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 3rem 2rem;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: var(--shadow-card);
        }
        .lead-form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            align-items: center;
        }
        .lead-form-left h2 {
            font-size: 1.8rem;
            margin-bottom: 0.75rem;
        }
        .lead-form-left p {
            color: var(--text-muted);
            line-height: 1.7;
        }
        .lead-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .lead-form input {
            background: rgba(255,255,255,0.06);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-sm);
            padding: 0.9rem 1.2rem;
            color: #fff;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.25s;
        }
        .lead-form input:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(0,240,255,0.2);
        }
        .lead-form button {
            background: linear-gradient(135deg, #0052FF, #003ECB);
            color: #fff;
            padding: 0.9rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 16px rgba(0,82,255,0.4);
            transition: all 0.25s;
        }
        .lead-form button:hover {
            box-shadow: 0 6px 24px rgba(0,240,255,0.5);
            transform: scale(1.02);
        }
        /* News list */
        .news-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 2rem;
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .news-item {
            display: flex;
            gap: 1rem;
            padding: 1rem;
            background: rgba(255,255,255,0.02);
            border-radius: var(--radius-sm);
            border-left: 3px solid transparent;
            transition: all 0.25s ease;
        }
        .news-item:hover {
            border-left-color: var(--accent-cyan);
            background: rgba(0,240,255,0.03);
        }
        .news-item-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.25rem;
            color: #fff;
        }
        .news-item-content p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
        }
        .news-sidebar {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            backdrop-filter: blur(10px);
            height: fit-content;
        }
        .news-sidebar h3 {
            font-size: 1.15rem;
            margin-bottom: 1rem;
            color: var(--accent-cyan);
        }
        .news-sidebar ul li {
            margin-bottom: 0.75rem;
            font-size: 0.9rem;
            color: var(--text-silver);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .news-sidebar ul li i {
            color: var(--accent-blue);
            font-size: 0.8rem;
        }
        /* Guarantee badges */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 1.5rem;
            text-align: center;
        }
        .guarantee-item {
            padding: 1.5rem;
            background: rgba(255,255,255,0.02);
            border-radius: var(--radius-md);
            border: 1px solid var(--glass-border);
        }
        .guarantee-item i {
            font-size: 2rem;
            color: var(--accent-cyan);
            margin-bottom: 0.5rem;
        }
        .guarantee-item span {
            font-weight: 600;
            color: #fff;
            display: block;
        }
        /* Privacy note */
        .privacy-note {
            background: rgba(0,82,255,0.05);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            color: var(--text-muted);
            font-size: 0.9rem;
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            line-height: 1.6;
        }
        .privacy-note i {
            color: var(--accent-cyan);
            margin-top: 0.15rem;
            font-size: 1.1rem;
        }
        /* Footer */
        .site-footer {
            border-top: 1px solid var(--glass-border);
            padding: 3rem 0 2rem;
            color: var(--text-muted);
            font-size: 0.9rem;
            background: rgba(0,0,0,0.3);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-col h3 {
            color: #fff;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
        .footer-col ul li {
            margin-bottom: 0.4rem;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.05);
        }
        /* FAB */
        .fab-left {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 999;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(8,9,15,0.7);
            backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.5rem;
            box-shadow: 0 0 18px rgba(0,240,255,0.4);
            transition: all 0.3s ease;
            cursor: pointer;
            animation: fabPulse 2.5s infinite;
        }
        .fab-left:hover {
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(0,240,255,0.7);
            border-color: var(--accent-cyan);
        }
        @keyframes fabPulse {
            0% { box-shadow: 0 0 12px rgba(0,240,255,0.35); }
            50% { box-shadow: 0 0 24px rgba(0,240,255,0.65); }
            100% { box-shadow: 0 0 12px rgba(0,240,255,0.35); }
        }
        .fab-notif {
            position: absolute;
            top: 4px;
            right: 4px;
            width: 10px;
            height: 10px;
            background: #FF0055;
            border-radius: 50%;
            animation: blink 1.2s infinite;
        }
        @keyframes blink {
            0%,100%{ opacity:1; }
            50%{ opacity:0.3; }
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .lead-form-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .main-nav {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                width: 100%;
                background: rgba(8,9,15,0.95);
                flex-direction: column;
                padding: 1.5rem;
                gap: 1.2rem;
                border-bottom: 1px solid var(--glass-border);
            }
            .main-nav.open {
                display: flex;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
        }

/* roulang page: article */
:root {
            --bg-deep: #08090F;
            --bg-nav: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.75);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #94A3B8;
            --border-glow: #00F0FF;
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --glass-bg: rgba(13, 17, 30, 0.6);
            --glass-border: rgba(0, 240, 255, 0.15);
            --radius-lg: 1.25rem;
            --radius-md: 0.875rem;
            --radius-sm: 0.625rem;
            --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --spacing-section: 5rem;
            --container-max: 1280px;
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-white);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image: radial-gradient(ellipse at 50% 0%, rgba(0, 82, 255, 0.08) 0%, transparent 70%);
            background-attachment: fixed;
            min-height: 100vh;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

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

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all 0.25s ease;
        }

        h1, h2, h3, h4, h5, h6 {
            line-height: 1.3;
            font-weight: 700;
        }

        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.8);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
            transition: background 0.3s ease;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 1.5rem;
        }

        .logo {
            font-weight: 700;
            font-size: 1.35rem;
            letter-spacing: -0.015em;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-shrink: 0;
        }

        .logo i {
            color: var(--accent-cyan);
            font-size: 1.6rem;
            filter: drop-shadow(0 0 6px rgba(0, 240, 255, 0.5));
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 2rem;
            font-weight: 500;
            font-size: 0.95rem;
        }

        .main-nav a {
            color: var(--text-silver);
            position: relative;
            padding: 0.35rem 0;
        }

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

        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 2px;
            transition: width 0.3s ease;
        }

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

        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }

        .btn-login {
            background: transparent;
            color: var(--text-white);
            padding: 0.55rem 1.3rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            border: 1px solid rgba(255,255,255,0.2);
        }

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

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-blue), #0040CC);
            color: #fff;
            padding: 0.6rem 1.5rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.35);
            border: 1px solid transparent;
        }

        .btn-signup:hover {
            box-shadow: 0 6px 26px rgba(0, 240, 255, 0.4);
            transform: translateY(-1px);
            border-color: rgba(0, 240, 255, 0.4);
        }

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

        /* Article Page Layout */
        .article-page {
            padding-top: 8rem;
            padding-bottom: 5rem;
        }

        .article-header {
            margin-bottom: 2.5rem;
            text-align: left;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1.25rem;
            margin-bottom: 1.25rem;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .article-meta .category-tag {
            display: inline-block;
            padding: 0.25rem 0.85rem;
            background: rgba(0, 82, 255, 0.2);
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: 3rem;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.03em;
        }

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

        .article-meta .date i {
            font-size: 0.9rem;
            color: var(--accent-cyan);
        }

        .article-header h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            color: var(--text-white);
            margin-bottom: 1rem;
        }

        .article-excerpt {
            font-size: 1.1rem;
            color: var(--text-silver);
            line-height: 1.7;
            border-left: 4px solid var(--accent-cyan);
            padding-left: 1.5rem;
            margin-top: 1.5rem;
        }

        .featured-image-wrapper {
            margin: 2rem 0 3rem 0;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--glass-border);
        }

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

        /* Article Content */
        .article-content {
            font-size: 1.05rem;
            line-height: 1.75;
            color: var(--text-silver);
        }

        .article-content h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--text-white);
            margin-top: 3rem;
            margin-bottom: 1.25rem;
            letter-spacing: -0.01em;
            position: relative;
            padding-bottom: 0.5rem;
        }

        .article-content h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 3px;
        }

        .article-content h3 {
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--text-white);
            margin-top: 2.25rem;
            margin-bottom: 1rem;
        }

        .article-content p {
            margin-bottom: 1.25rem;
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 1.5rem;
            padding-left: 1.5rem;
        }

        .article-content li {
            margin-bottom: 0.65rem;
            position: relative;
        }

        .article-content ul li::before {
            content: '';
            display: inline-block;
            width: 8px;
            height: 8px;
            background: var(--accent-cyan);
            border-radius: 50%;
            margin-right: 0.75rem;
            margin-left: -1.5rem;
            vertical-align: middle;
            box-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
        }

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

        .article-content a {
            color: var(--accent-cyan);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color 0.25s ease;
        }

        .article-content a:hover {
            color: var(--accent-blue);
        }

        .article-content blockquote {
            margin: 2rem 0;
            padding: 1.5rem 2rem;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-left: 5px solid var(--accent-cyan);
            border-radius: var(--radius-md);
            color: var(--text-silver);
            font-style: italic;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: 1.5rem 0;
            box-shadow: var(--shadow-card);
        }

        /* Tip Box */
        .tip-box {
            margin: 2.5rem 0;
            padding: 2rem;
            background: rgba(0, 82, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: var(--radius-lg);
            display: flex;
            gap: 1.25rem;
            align-items: flex-start;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .tip-box .tip-icon {
            font-size: 2rem;
            color: var(--accent-cyan);
            flex-shrink: 0;
            filter: drop-shadow(0 0 6px rgba(0, 240, 255, 0.5));
        }

        .tip-box .tip-text strong {
            display: block;
            font-size: 1.05rem;
            margin-bottom: 0.35rem;
            color: var(--text-white);
        }

        /* Not Found */
        .not-found-state {
            text-align: center;
            padding: 5rem 2rem;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .not-found-state i {
            font-size: 3rem;
            color: var(--accent-cyan);
            margin-bottom: 1.5rem;
            display: block;
        }

        .not-found-state h2 {
            font-size: 1.8rem;
            margin-bottom: 1rem;
            color: var(--text-white);
        }

        .not-found-state p {
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }

        .btn-primary {
            display: inline-block;
            padding: 0.75rem 2.25rem;
            background: linear-gradient(135deg, var(--accent-blue), #0040CC);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.95rem;
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.35);
            border: 1px solid transparent;
            transition: all 0.3s ease;
        }

        .btn-primary:hover {
            box-shadow: 0 6px 26px rgba(0, 240, 255, 0.4);
            transform: translateY(-2px);
            border-color: rgba(0, 240, 255, 0.4);
            color: #fff;
        }

        /* CTA Section */
        .cta-section {
            margin-top: 4rem;
            padding: 3rem 2.5rem;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            text-align: center;
            box-shadow: 0 0 40px rgba(0, 82, 255, 0.1);
        }

        .cta-section h3 {
            font-size: 1.7rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--text-white);
        }

        .cta-section p {
            color: var(--text-silver);
            margin-bottom: 1.5rem;
            font-size: 1rem;
        }

        /* Footer */
        .site-footer {
            margin-top: 5rem;
            padding: 4rem 0 2rem 0;
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            background: rgba(8, 9, 15, 0.9);
        }

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

        .footer-col h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.03em;
        }

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

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

        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color 0.25s ease;
        }

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

        .footer-bottom {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.06);
            color: var(--text-muted);
            font-size: 0.8rem;
        }

        /* FAB */
        .floating-fab {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 50;
            width: 54px;
            height: 54px;
            border-radius: 3rem;
            background: rgba(13, 17, 30, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(13,17,30,0.9), rgba(13,17,30,0.9)), 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;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.35);
            transition: all 0.35s ease;
            cursor: pointer;
            animation: fabPulse 2.5s ease-in-out infinite;
        }

        @keyframes fabPulse {
            0%, 100% { box-shadow: 0 0 15px rgba(0, 240, 255, 0.35); }
            50% { box-shadow: 0 0 28px rgba(0, 240, 255, 0.6); }
        }

        .floating-fab:hover {
            transform: scale(1.12);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.7);
            color: #fff;
            background-image: linear-gradient(rgba(0,82,255,0.9), rgba(0,82,255,0.9)), linear-gradient(135deg, #00F0FF, #0052FF);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-header h1 {
                font-size: 2.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 60px;
            }
            .main-nav {
                position: fixed;
                top: 60px;
                left: 0;
                width: 100%;
                background: rgba(8,9,15,0.95);
                backdrop-filter: blur(24px);
                -webkit-backdrop-filter: blur(24px);
                flex-direction: column;
                align-items: flex-start;
                padding: 1.5rem;
                gap: 1.25rem;
                border-bottom: 1px solid var(--glass-border);
                display: none;
            }
            .main-nav.mobile-open {
                display: flex;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .article-header h1 {
                font-size: 1.8rem;
            }
            .article-content h2 {
                font-size: 1.5rem;
            }
            .article-excerpt {
                font-size: 0.95rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .cta-section {
                padding: 2rem 1.5rem;
            }
            .floating-fab {
                left: 1rem;
                bottom: 5rem;
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .article-page {
                padding-top: 6.5rem;
            }
            .article-header h1 {
                font-size: 1.55rem;
            }
            .article-meta {
                gap: 0.75rem;
                font-size: 0.78rem;
            }
            .tip-box {
                flex-direction: column;
                padding: 1.5rem;
            }
        }

/* roulang page: category1 */
:root {
            --bg-deep: #08090F;
            --bg-nav: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.75);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #94A3B8;
            --border-glow: #00F0FF;
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --glass-bg: rgba(13, 17, 30, 0.6);
            --glass-border: rgba(0, 240, 255, 0.15);
            --radius-lg: 1.25rem;
            --radius-md: 0.875rem;
            --radius-sm: 0.625rem;
            --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --spacing-section: 5rem;
            --container-max: 1280px;
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-white);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image: radial-gradient(ellipse at 50% 0%, rgba(0, 82, 255, 0.08) 0%, transparent 70%);
            background-attachment: fixed;
            padding-top: 68px;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all 0.25s ease;
        }

        ul {
            list-style: none;
        }

        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
            transition: background 0.3s ease;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 1.5rem;
        }

        .logo {
            font-weight: 700;
            font-size: 1.35rem;
            letter-spacing: -0.015em;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-shrink: 0;
        }

        .logo i {
            color: var(--accent-cyan);
            font-size: 1.6rem;
            filter: drop-shadow(0 0 6px rgba(0, 240, 255, 0.5));
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 2rem;
            font-weight: 500;
            font-size: 0.95rem;
        }

        .main-nav a {
            color: var(--text-silver);
            position: relative;
            padding: 0.35rem 0;
            white-space: nowrap;
        }

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

        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 2px;
            transition: width 0.3s ease;
        }

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

        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }

        .btn-login {
            background: transparent;
            color: var(--text-white);
            padding: 0.55rem 1.3rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            border: 1px solid rgba(255, 255, 255, 0.2);
            white-space: nowrap;
        }

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

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-blue), #0040CC);
            color: #fff;
            padding: 0.6rem 1.5rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.35);
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .btn-signup:hover {
            box-shadow: 0 6px 26px rgba(0, 240, 255, 0.4);
            transform: translateY(-1px);
            border-color: rgba(0, 240, 255, 0.4);
        }

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

        /* Page Header */
        .page-header {
            position: relative;
            padding: 6rem 0 4rem;
            overflow: hidden;
            background: linear-gradient(180deg, rgba(0, 82, 255, 0.05) 0%, transparent 100%);
            border-bottom: 1px solid var(--glass-border);
        }

        .page-header-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background: url('/assets/images/coverpic/cover-1.jpg') center/cover no-repeat;
            opacity: 0.12;
            mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
            -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
        }

        .page-header-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }

        .page-header-content h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 1.25rem;
            letter-spacing: -0.025em;
            background: linear-gradient(135deg, #FFFFFF 0%, #CBD5E1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-header-content p {
            font-size: 1.15rem;
            color: var(--text-silver);
            line-height: 1.7;
            margin-bottom: 2rem;
        }

        .breadcrumb {
            display: flex;
            gap: 0.5rem;
            align-items: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }

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

        .breadcrumb a:hover {
            text-decoration: underline;
        }

        .breadcrumb i {
            font-size: 0.7rem;
        }

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

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
            color: var(--text-white);
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            margin-bottom: 3rem;
            line-height: 1.7;
            max-width: 700px;
        }

        /* Stats Dashboard */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        .stat-card {
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            text-align: left;
            transition: all 0.35s ease;
        }

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

        .stat-icon {
            font-size: 2rem;
            color: var(--accent-cyan);
            margin-bottom: 1rem;
        }

        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
            margin-bottom: 0.5rem;
        }

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

        /* Game Category Grid */
        .game-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.75rem;
        }

        .game-card {
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all 0.35s ease;
            display: flex;
            flex-direction: column;
        }

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

        .game-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .game-card-body {
            padding: 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .game-card-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--text-white);
        }

        .game-card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 1.25rem;
        }

        .game-card-tags {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
            margin-bottom: 1rem;
        }

        .tag {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 240, 255, 0.2);
        }

        .tag.hot {
            background: rgba(255, 77, 77, 0.12);
            color: #FF6B6B;
            border-color: rgba(255, 77, 77, 0.25);
        }

        .btn-play {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-blue), #0040CC);
            color: #fff;
            padding: 0.65rem 1.5rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            text-align: center;
            border: 1px solid transparent;
            transition: all 0.3s ease;
        }

        .btn-play:hover {
            box-shadow: 0 6px 26px rgba(0, 240, 255, 0.4);
            border-color: rgba(0, 240, 255, 0.4);
            transform: translateY(-1px);
        }

        /* Benefits Section */
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }

        .benefit-item {
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            display: flex;
            gap: 1.25rem;
            align-items: flex-start;
            transition: all 0.35s ease;
        }

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

        .benefit-icon {
            font-size: 2rem;
            color: var(--accent-cyan);
            flex-shrink: 0;
            margin-top: 0.25rem;
        }

        .benefit-content h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

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

        /* CTA Section */
        .cta-section {
            background: linear-gradient(180deg, transparent 0%, rgba(0, 82, 255, 0.06) 50%, transparent 100%);
            border-top: 1px solid var(--glass-border);
            border-bottom: 1px solid var(--glass-border);
            text-align: center;
        }

        .cta-box {
            max-width: 650px;
            margin: 0 auto;
        }

        .cta-box h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, #FFFFFF 0%, var(--accent-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

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

        .btn-cta-primary {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            color: #fff;
            padding: 0.9rem 2.5rem;
            border-radius: 999px;
            font-weight: 800;
            font-size: 1.05rem;
            box-shadow: 0 6px 28px rgba(0, 240, 255, 0.4);
            border: none;
            transition: all 0.35s ease;
        }

        .btn-cta-primary:hover {
            box-shadow: 0 10px 36px rgba(0, 240, 255, 0.55);
            transform: translateY(-2px);
        }

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

        .faq-item {
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            margin-bottom: 1rem;
            overflow: hidden;
            transition: all 0.3s ease;
        }

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

        .faq-question {
            padding: 1.25rem 1.75rem;
            font-weight: 700;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-white);
            transition: color 0.25s ease;
        }

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

        .faq-question i {
            transition: transform 0.35s ease;
            color: var(--accent-cyan);
            font-size: 0.9rem;
        }

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

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

        .faq-item.open .faq-answer {
            max-height: 500px;
        }

        .faq-answer-inner {
            padding: 0 1.75rem 1.5rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* Footer */
        .site-footer {
            background: rgba(8, 9, 15, 0.95);
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            padding: 3.5rem 0 2rem;
        }

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

        .footer-col h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
            color: var(--text-white);
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

        .footer-col a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color 0.25s ease;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--glass-border);
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 5rem;
            z-index: 990;
            width: 52px;
            height: 52px;
            border-radius: 999px;
            background: rgba(13, 17, 30, 0.8);
            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;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
            opacity: 0.7;
            transition: all 0.35s ease;
            cursor: pointer;
        }

        .fab-left::before {
            content: '';
            position: absolute;
            inset: -3px;
            border-radius: 999px;
            padding: 3px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            opacity: 0.5;
            transition: opacity 0.35s ease;
        }

        .fab-left:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.55);
        }

        .fab-left:hover::before {
            opacity: 1;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

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

            .page-header-content h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }

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

            .main-nav.mobile-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 68px;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                padding: 1.5rem;
                gap: 1rem;
                border-bottom: 1px solid var(--glass-border);
                z-index: 999;
            }

            .header-actions {
                gap: 0.5rem;
            }

            .btn-login,
            .btn-signup {
                padding: 0.45rem 1rem;
                font-size: 0.8rem;
            }

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

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

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

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

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

            .cta-box h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                gap: 1rem;
            }

            .logo {
                font-size: 1rem;
            }

            .logo span {
                font-size: 0.85rem;
            }

            .btn-login {
                padding: 0.4rem 0.8rem;
                font-size: 0.75rem;
            }

            .btn-signup {
                padding: 0.45rem 0.9rem;
                font-size: 0.75rem;
            }

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

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

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

            .section-title {
                font-size: 1.4rem;
            }

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

            .btn-cta-primary {
                padding: 0.75rem 1.8rem;
                font-size: 0.9rem;
            }

            .fab-left {
                width: 44px;
                height: 44px;
                font-size: 1.2rem;
                left: 1rem;
                bottom: 4rem;
            }
        }

/* roulang page: category2 */
:root {
            --bg-deep: #08090F;
            --bg-nav: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.75);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #94A3B8;
            --border-glow: #00F0FF;
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --glass-bg: rgba(13, 17, 30, 0.6);
            --glass-border: rgba(0, 240, 255, 0.15);
            --radius-lg: 1.25rem;
            --radius-md: 0.875rem;
            --radius-sm: 0.625rem;
            --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --spacing-section: 5rem;
            --container-max: 1280px;
            --success-green: #10B981;
            --danger-red: #EF4444;
            --warning-amber: #F59E0B;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-white);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image: radial-gradient(ellipse at 50% 0%, rgba(0, 82, 255, 0.08) 0%, transparent 70%);
            background-attachment: fixed;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all 0.25s ease;
        }
        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.8);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
            transition: background 0.3s ease;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 1.5rem;
        }
        .logo {
            font-weight: 700;
            font-size: 1.35rem;
            letter-spacing: -0.015em;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-shrink: 0;
        }
        .logo i {
            color: var(--accent-cyan);
            font-size: 1.6rem;
            filter: drop-shadow(0 0 6px rgba(0, 240, 255, 0.5));
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 2rem;
            font-weight: 500;
            font-size: 0.95rem;
        }
        .main-nav a {
            color: var(--text-silver);
            position: relative;
            padding: 0.35rem 0;
        }
        .main-nav a.active {
            color: var(--accent-cyan);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 2px;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after,
        .main-nav a.active::after {
            width: 100%;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }
        .btn-login {
            background: transparent;
            color: var(--text-white);
            padding: 0.55rem 1.3rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            border: 1px solid rgba(255,255,255,0.2);
        }
        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-blue), #0040CC);
            color: #fff;
            padding: 0.6rem 1.5rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.35);
            border: 1px solid transparent;
        }
        .btn-signup:hover {
            box-shadow: 0 6px 26px rgba(0, 240, 255, 0.4);
            transform: translateY(-1px);
            border-color: rgba(0, 240, 255, 0.4);
        }
        .mobile-menu-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-white);
            background: none;
            border: none;
            cursor: pointer;
        }
        /* Hero - Bento Style */
        .hero-section {
            padding: 9rem 0 5rem 0;
            position: relative;
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            opacity: 0.18;
            mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
            -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
        }
        .hero-grid {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .hero-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 1.5rem;
            letter-spacing: -0.025em;
            background: linear-gradient(135deg, #FFFFFF 0%, #CBD5E1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-content p {
            font-size: 1.15rem;
            color: var(--text-muted);
            margin-bottom: 2rem;
            max-width: 90%;
            line-height: 1.7;
        }
        .hero-bento {
            display: grid;
            grid-template-columns: 1fr 1fr;
            grid-template-rows: auto auto;
            gap: 1rem;
        }
        .bento-main {
            grid-column: 1 / 3;
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            box-shadow: var(--shadow-card);
        }
        .bento-main .stat-large {
            font-size: 3rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1;
            margin-bottom: 0.5rem;
        }
        .bento-main .stat-label {
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 500;
        }
        .bento-small {
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
            box-shadow: var(--shadow-card);
        }
        .bento-small i {
            font-size: 2rem;
            color: var(--accent-blue);
            margin-bottom: 0.75rem;
        }
        .bento-small .bento-title {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 0.25rem;
        }
        .bento-small .bento-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, var(--accent-blue), #0040CC);
            color: #fff;
            padding: 0.85rem 2.2rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.35);
            border: 1px solid transparent;
            transition: all 0.3s ease;
        }
        .btn-primary:hover {
            box-shadow: 0 6px 26px rgba(0, 240, 255, 0.5);
            transform: translateY(-2px);
            border-color: rgba(0, 240, 255, 0.4);
        }
        /* Sections Common */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-header {
            margin-bottom: 3rem;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
        }
        .section-header p {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 700px;
            line-height: 1.7;
        }
        /* Security Steps - Process Flow */
        .steps-flow {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .step-item {
            display: grid;
            grid-template-columns: auto 1fr;
            gap: 2rem;
            align-items: flex-start;
        }
        .step-marker {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--glass-bg);
            border: 2px solid var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            flex-shrink: 0;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
        }
        .step-content {
            background: var(--bg-card);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            box-shadow: var(--shadow-card);
        }
        .step-content h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
        .step-content p {
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 1rem;
        }
        .step-tips {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .step-tips li {
            padding: 0.5rem 0;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            color: var(--text-silver);
            font-size: 0.95rem;
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }
        .step-tips li:last-child { border-bottom: none; }
        .step-tips i {
            color: var(--accent-cyan);
            font-size: 0.85rem;
        }
        /* Danger Zone / Warnings */
        .danger-zone {
            background: linear-gradient(135deg, rgba(239, 68, 68, 0.08), rgba(239, 68, 68, 0.02));
            border: 1px solid rgba(239, 68, 68, 0.25);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            margin-top: 3rem;
        }
        .danger-zone h3 {
            color: var(--danger-red);
            font-size: 1.4rem;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .danger-zone ul {
            list-style: none;
            padding: 0;
            margin: 0 0 1.5rem 0;
        }
        .danger-zone ul li {
            padding: 0.6rem 0;
            color: var(--text-silver);
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .danger-zone ul li i {
            color: var(--danger-red);
        }
        /* Accordion / FAQ */
        .faq-accordion {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .faq-question {
            width: 100%;
            padding: 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            text-align: left;
            font-weight: 600;
            font-size: 1.1rem;
            color: var(--text-white);
            background: transparent;
            cursor: pointer;
        }
        .faq-question i {
            transition: transform 0.3s ease;
            color: var(--accent-cyan);
            font-size: 1rem;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 1.5rem;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.5rem 1.5rem;
        }
        .faq-answer p {
            color: var(--text-muted);
            line-height: 1.7;
        }
        /* CTA Bar */
        .cta-bar {
            background: linear-gradient(135deg, var(--bg-nav), #0A0F1C);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-lg);
            padding: 3rem 2.5rem;
            text-align: center;
            margin-top: 4rem;
            box-shadow: 0 0 25px rgba(0, 82, 255, 0.1);
        }
        .cta-bar h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .cta-bar p {
            color: var(--text-muted);
            margin-bottom: 2rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        /* Footer */
        .site-footer {
            background: rgba(8, 9, 15, 0.95);
            border-top: 1px solid rgba(0, 240, 255, 0.08);
            padding: 4rem 0 2.5rem;
            margin-top: 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2.5rem;
            margin-bottom: 3rem;
        }
        .footer-col h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
            color: var(--text-white);
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 0.7rem;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color 0.2s ease;
        }
        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.06);
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        /* FAB */
        .fab-left {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 50;
        }
        .fab-btn {
            width: 56px;
            height: 56px;
            border-radius: 50px;
            background: rgba(8,9,15,0.75);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid var(--accent-cyan);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            transition: all 0.3s ease;
            cursor: pointer;
            opacity: 0.85;
        }
        .fab-btn:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .hero-bento {
                grid-template-columns: 1fr 1fr;
            }
            .step-item {
                gap: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            :root {
                --spacing-section: 3.5rem;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                width: 100%;
                background: rgba(13, 17, 30, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 1.5rem;
                gap: 1rem;
                border-bottom: 1px solid var(--glass-border);
            }
            .main-nav.open {
                display: flex;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .hero-bento {
                grid-template-columns: 1fr;
            }
            .bento-main {
                grid-column: 1;
            }
            .step-item {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .step-marker {
                margin: 0 auto;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 520px) {
            .header-actions .btn-login {
                padding: 0.45rem 0.9rem;
                font-size: 0.8rem;
            }
            .header-actions .btn-signup {
                padding: 0.5rem 1rem;
                font-size: 0.8rem;
            }
            .hero-section {
                padding: 7rem 0 3rem 0;
            }
            .hero-content h1 {
                font-size: 1.7rem;
            }
            .btn-primary {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category3 */
/* ===== DESIGN SYSTEM ===== */
        :root {
            --bg-deep: #08090F;
            --bg-nav: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.75);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #94A3B8;
            --border-glow: #00F0FF;
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --glass-bg: rgba(13, 17, 30, 0.6);
            --glass-border: rgba(0, 240, 255, 0.15);
            --radius-lg: 1.25rem;
            --radius-md: 0.875rem;
            --radius-sm: 0.625rem;
            --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --spacing-section: 5rem;
            --container-max: 1280px;
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-white);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image: radial-gradient(ellipse at 50% 0%, rgba(0, 82, 255, 0.08) 0%, transparent 70%);
            background-attachment: fixed;
            margin: 0;
            padding: 0;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all 0.25s ease;
        }

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

        h1, h2, h3, h4, h5, h6 {
            margin: 0 0 1rem 0;
            line-height: 1.3;
        }

        p {
            margin: 0 0 1rem 0;
        }

        /* ===== HEADER & NAVIGATION ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
            transition: background 0.3s ease;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 1.5rem;
        }

        .logo {
            font-weight: 700;
            font-size: 1.35rem;
            letter-spacing: -0.015em;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-shrink: 0;
            white-space: nowrap;
        }

        .logo i {
            color: var(--accent-cyan);
            font-size: 1.6rem;
            filter: drop-shadow(0 0 6px rgba(0, 240, 255, 0.5));
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 2rem;
            font-weight: 500;
            font-size: 0.95rem;
        }

        .main-nav a {
            color: var(--text-silver);
            position: relative;
            padding: 0.35rem 0;
            white-space: nowrap;
        }

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

        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 2px;
            transition: width 0.3s ease;
        }

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

        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }

        .btn-login {
            background: transparent;
            color: var(--text-white);
            padding: 0.55rem 1.3rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            border: 1px solid rgba(255, 255, 255, 0.2);
            white-space: nowrap;
        }

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

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-blue), #0040CC);
            color: #fff;
            padding: 0.6rem 1.5rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.35);
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .btn-signup:hover {
            box-shadow: 0 6px 26px rgba(0, 240, 255, 0.4);
            transform: translateY(-1px);
            border-color: rgba(0, 240, 255, 0.4);
        }

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

        /* ===== HERO SECTION ===== */
        .hero-section {
            padding: 9rem 0 5rem 0;
            position: relative;
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background: url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
            opacity: 0.15;
            mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
            -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
        }

        .hero-grid {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 1.5rem;
            letter-spacing: -0.025em;
            background: linear-gradient(135deg, #FFFFFF 0%, #CBD5E1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

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

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

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-blue), #0036B0);
            color: #fff;
            padding: 0.85rem 2.2rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 4px 24px rgba(0, 82, 255, 0.4);
            border: 1px solid transparent;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            transition: all 0.3s ease;
        }

        .btn-primary:hover {
            box-shadow: 0 8px 32px rgba(0, 240, 255, 0.5);
            transform: translateY(-2px);
            border-color: rgba(0, 240, 255, 0.4);
        }

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

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

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

        .security-panel {
            background: var(--glass-bg);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 2.5rem 2rem;
            text-align: center;
            box-shadow: var(--shadow-card);
            width: 100%;
            max-width: 420px;
        }

        .security-panel i.shield-icon {
            font-size: 4rem;
            color: var(--accent-cyan);
            filter: drop-shadow(0 0 20px rgba(0, 240, 255, 0.6));
            margin-bottom: 1rem;
            display: block;
        }

        .protection-stats {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
            margin-top: 1.5rem;
        }

        .protection-stat {
            background: rgba(0, 82, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-sm);
            padding: 1rem 0.8rem;
        }

        .protection-stat .stat-number {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-cyan);
            display: block;
        }

        .protection-stat .stat-label {
            font-size: 0.8rem;
            color: var(--text-silver);
            margin-top: 0.25rem;
        }

        /* Countdown Ring */
        .countdown-ring-wrapper {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            margin: 1.5rem 0;
            justify-content: center;
        }

        .countdown-ring {
            position: relative;
            width: 90px;
            height: 90px;
        }

        .countdown-ring svg {
            transform: rotate(-90deg);
            width: 90px;
            height: 90px;
        }

        .countdown-ring .bg-circle {
            fill: none;
            stroke: rgba(255, 255, 255, 0.1);
            stroke-width: 6;
        }

        .countdown-ring .progress-circle {
            fill: none;
            stroke: var(--accent-cyan);
            stroke-width: 6;
            stroke-linecap: round;
            stroke-dasharray: 226;
            stroke-dashoffset: 56;
            transition: stroke-dashoffset 0.5s ease;
            filter: drop-shadow(0 0 6px rgba(0, 240, 255, 0.5));
        }

        .countdown-ring .ring-text {
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--accent-cyan);
        }

        .countdown-info {
            text-align: left;
        }

        .countdown-info .countdown-title {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0.25rem;
        }

        .countdown-info .countdown-value {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-white);
        }

        /* ===== FEATURE GRID ===== */
        .feature-grid-section {
            padding: var(--spacing-section) 0;
        }

        .section-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            padding: 0.4rem 1rem;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 1rem;
            letter-spacing: 0.03em;
            border: 1px solid rgba(0, 240, 255, 0.2);
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--text-white);
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-silver);
            max-width: 700px;
            margin-bottom: 3rem;
            line-height: 1.7;
        }

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

        .feature-card {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 2.2rem 1.8rem;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

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

        .feature-card:hover {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }

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

        .feature-card .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: rgba(0, 82, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 240, 255, 0.25);
        }

        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--text-white);
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        /* ===== PROCESS STEPS ===== */
        .process-section {
            padding: var(--spacing-section) 0;
            background: rgba(0, 82, 255, 0.03);
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            position: relative;
        }

        .process-steps::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
    opacity: 0.3;
    z-index: 0;
}

.process-step {
    text-align: left;
    position: relative;
    z-index: 1;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2rem 1.5rem;
    transition: all 0.3s ease;
}

.process-step:hover {
    border-color: rgba(0, 240, 255, 0.4);
    box-shadow: var(--shadow-card);
    transform: translateY(-3px);
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue), #0036B0);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
    color: #fff;
    margin-bottom: 1.25rem;
    border: 2px solid rgba(0, 240, 255, 0.4);
    box-shadow: 0 0 20px rgba(0, 82, 255, 0.3);
}

.process-step h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.65rem;
    color: var(--text-white);
}

.process-step p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.55;
    margin: 0;
}

/* ===== TECH COMPARISON ===== */
.tech-section {
    padding: var(--spacing-section) 0;
}

.tech-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.tech-image-wrap {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--glass-border);
}

.tech-image-wrap img {
    width: 100%;
    height: auto;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

.tech-image-wrap::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(8, 9, 15, 0.6) 100%);
    pointer-events: none;
}

.tech-details h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-white);
}

.tech-list {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    margin-bottom: 2rem;
}

.tech-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    padding: 1rem 1.2rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.tech-item:hover {
    border-color: rgba(0, 240, 255, 0.35);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.tech-item i {
    color: var(--accent-cyan);
    font-size: 1.3rem;
    margin-top: 0.2rem;
    flex-shrink: 0;
}

.tech-item .tech-item-content h4 {
    font-size: 1rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    color: var(--text-white);
}

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

/* ===== FAQ SECTION ===== */
.faq-section {
    padding: var(--spacing-section) 0;
    background: rgba(0, 82, 255, 0.03);
}

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

.faq-item {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(0, 240, 255, 0.35);
}

.faq-question {
    padding: 1.3rem 1.8rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-white);
    background: none;
    width: 100%;
    text-align: left;
    border: none;
    transition: color 0.2s ease;
}

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

.faq-question i {
    font-size: 0.9rem;
    color: var(--accent-cyan);
    transition: transform 0.3s ease;
}

.faq-answer {
    padding: 0 1.8rem 1.3rem 1.8rem;
    font-size: 0.9rem;
    color: var(--text-silver);
    line-height: 1.7;
    display: none;
}

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

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

/* ===== CTA SECTION ===== */
.cta-section {
    padding: 4rem 0;
    text-align: left;
}

.cta-card {
    background: linear-gradient(135deg, rgba(0, 82, 255, 0.2), rgba(0, 36, 176, 0.15));
    border: 1px solid rgba(0, 240, 255, 0.25);
    border-radius: var(--radius-lg);
    padding: 3rem 3rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    flex-wrap: wrap;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

.cta-card .cta-text h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
    color: var(--text-white);
}

.cta-card .cta-text p {
    font-size: 1rem;
    color: var(--text-silver);
    margin: 0;
}

.cta-btn-group {
    display: flex;
    gap: 1rem;
    flex-shrink: 0;
}

/* ===== FOOTER ===== */
.site-footer {
    background: rgba(13, 17, 30, 0.9);
    border-top: 1px solid rgba(0, 240, 255, 0.1);
    padding: 3.5rem 0 1.5rem 0;
    margin-top: 3rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2.5rem;
}

.footer-col h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 1.25rem;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

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

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 1.5rem;
    text-align: center;
}

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

/* ===== FAB - Left Floating Action Button (Cyber & Neon Style) ===== */
.fab {
    position: fixed;
    left: 1rem;
    bottom: 6rem;
    z-index: 50;
    width: 52px;
    height: 52px;
    border-radius: 50px;
    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;
    color: var(--accent-cyan);
    font-size: 1.4rem;
    cursor: pointer;
    box-shadow: 0 0 18px rgba(0, 240, 255, 0.4);
    transition: all 0.3s ease;
    opacity: 0.65;
    animation: fabBreathe 3s ease-in-out infinite;
}

.fab::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 50px;
    background: linear-gradient(135deg, #00F0FF, #0052FF);
    z-index: -1;
    opacity: 0.8;
}

.fab:hover {
    opacity: 1;
    box-shadow: 0 0 32px rgba(0, 240, 255, 0.7);
    transform: scale(1.08);
    animation: none;
}

.fab .fab-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    width: 14px;
    height: 14px;
    background: #FF007F;
    border-radius: 50%;
    border: 2px solid #08090F;
    box-shadow: 0 0 10px rgba(255, 0, 127, 0.7);
    animation: badgePulse 1.5s ease-in-out infinite;
}

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

@keyframes badgePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.25); }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: left;
    }
    .hero-content h1 {
        font-size: 2.2rem;
    }
    .hero-visual {
        justify-content: flex-start;
    }
    .feature-grid {
        grid-template-columns: 1fr 1fr;
    }
    .process-steps {
        grid-template-columns: 1fr 1fr;
    }
    .process-steps::before {
        display: none;
    }
    .tech-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .header-inner {
        height: 60px;
    }
    .main-nav {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background: rgba(8, 9, 15, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 1.5rem;
        gap: 1rem;
        border-bottom: 1px solid rgba(0, 240, 255, 0.15);
    }
    .main-nav.open {
        display: flex;
    }
    .mobile-menu-toggle {
        display: block;
    }
    .hero-section {
        padding: 7rem 0 3rem 0;
    }
    .hero-content h1 {
        font-size: 1.8rem;
    }
    .feature-grid {
        grid-template-columns: 1fr;
    }
    .process-steps {
        grid-template-columns: 1fr;
    }
    .cta-card {
        flex-direction: column;
        text-align: center;
        padding: 2rem 1.5rem;
    }
    .cta-btn-group {
        flex-direction: column;
        width: 100%;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 520px) {
    .hero-content h1 {
        font-size: 1.5rem;
    }
    .section-title {
        font-size: 1.6rem;
    }
    .header-actions .btn-login,
    .header-actions .btn-signup {
        padding: 0.45rem 1rem;
        font-size: 0.8rem;
    }
    .countdown-ring-wrapper {
        flex-direction: column;
        align-items: flex-start;
    }
}