/* roulang page: index */
:root {
            --bg-deep-space: #08090F;
            --bg-cyber-navy: #0D111E;
            --accent-electric-blue: #0052FF;
            --accent-neon-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-cool-silver: #CBD5E1;
            --border-glow: rgba(0, 240, 255, 0.3);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition-fast: 0.25s ease;
            --font-heading: 'Segoe UI', 'Roboto', 'Open Sans', sans-serif;
            --font-body: 'Inter', 'Segoe UI', 'Roboto', sans-serif;
        }

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

        body {
            font-family: var(--font-body);
            background: var(--bg-deep-space);
            color: var(--text-cool-silver);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

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

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

        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            z-index: 1000;
            padding: 0 0;
            transition: background var(--transition-fast);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1320px;
            margin: 0 auto;
            padding: 12px 24px;
        }

        .logo {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--text-white);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .logo i {
            color: var(--accent-neon-cyan);
            font-size: 1.5rem;
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.6);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-list li a {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-cool-silver);
            position: relative;
            padding: 6px 0;
            transition: color var(--transition-fast);
        }

        .nav-list li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-neon-cyan);
            transition: width var(--transition-fast);
            box-shadow: 0 0 8px var(--accent-neon-cyan);
        }

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

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

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

        .btn-login {
            background: transparent;
            border: 1px solid var(--text-cool-silver);
            color: var(--text-white);
            padding: 9px 20px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

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

        .btn-signup {
            background: var(--accent-electric-blue);
            border: none;
            color: #fff;
            padding: 10px 22px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            box-shadow: 0 0 15px rgba(0, 82, 255, 0.5);
        }

        .btn-signup:hover {
            background: var(--accent-neon-cyan);
            color: var(--bg-deep-space);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.8rem;
            cursor: pointer;
        }

        /* Mobile Nav */
        @media (max-width: 768px) {
            .nav-list {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.97);
                backdrop-filter: blur(24px);
                padding: 20px 24px;
                gap: 16px;
            }
            .nav-list.active {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
        }

        /* Hero - Flash Sale */
        .hero-section {
            padding: 140px 24px 80px;
            background: linear-gradient(135deg, var(--bg-deep-space) 0%, var(--bg-cyber-navy) 100%);
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.15) 0%, transparent 70%);
            z-index: 0;
        }

        .hero-container {
            max-width: 1200px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }

        .flash-sale-banner {
            background: linear-gradient(90deg, rgba(0, 240, 255, 0.15), rgba(0, 82, 255, 0.15));
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: var(--radius-lg);
            padding: 20px 30px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 40px;
            backdrop-filter: blur(10px);
        }

        .flash-timer {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .flash-label {
            font-weight: 700;
            color: var(--accent-neon-cyan);
            font-size: 1.1rem;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .timer-box {
            background: var(--bg-deep-space);
            border: 1px solid var(--accent-neon-cyan);
            border-radius: 8px;
            padding: 8px 14px;
            font-weight: 700;
            font-size: 1.3rem;
            color: var(--text-white);
            min-width: 45px;
            text-align: center;
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
        }

        .hero-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .hero-text h1 {
            font-family: var(--font-heading);
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.25;
            margin-bottom: 20px;
        }

        .hero-text h1 span {
            background: linear-gradient(90deg, var(--accent-neon-cyan), var(--accent-electric-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 1.05rem;
            color: var(--text-cool-silver);
            margin-bottom: 30px;
            line-height: 1.7;
        }

        .hero-cta-group {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        .btn-primary-glow {
            background: linear-gradient(135deg, var(--accent-electric-blue), #0039cc);
            border: none;
            color: #fff;
            padding: 14px 32px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            box-shadow: 0 0 25px rgba(0, 82, 255, 0.6);
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-primary-glow:hover {
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.8);
            transform: translateY(-2px);
        }

        .btn-outline-glow {
            background: transparent;
            border: 2px solid var(--accent-neon-cyan);
            color: var(--accent-neon-cyan);
            padding: 13px 30px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .btn-outline-glow:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
        }

        .hero-visual img {
            border-radius: var(--radius-lg);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.25);
            border: 1px solid rgba(0, 240, 255, 0.2);
        }

        @media (max-width: 768px) {
            .hero-content {
                grid-template-columns: 1fr;
            }
            .hero-text h1 {
                font-size: 2rem;
            }
            .flash-sale-banner {
                flex-direction: column;
                text-align: center;
            }
        }

        /* Section Common */
        .section-block {
            padding: 80px 24px;
            position: relative;
        }

        .section-block:nth-child(even) {
            background: var(--bg-cyber-navy);
        }

        .section-inner {
            max-width: 1200px;
            margin: 0 auto;
        }

        .section-label {
            display: inline-block;
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--accent-neon-cyan);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 12px;
        }

        .section-heading {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-cool-silver);
            margin-bottom: 40px;
            line-height: 1.6;
        }

        /* Features Grid */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .feature-item {
            background: rgba(13, 17, 30, 0.7);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(0, 240, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 30px 24px;
            transition: all var(--transition-fast);
        }

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

        .feature-icon {
            font-size: 2rem;
            color: var(--accent-neon-cyan);
            margin-bottom: 18px;
        }

        .feature-item h3 {
            color: var(--text-white);
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 10px;
        }

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

        @media (max-width: 768px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Scene Demo */
        .scene-demo {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .scene-text h3 {
            font-family: var(--font-heading);
            font-size: 1.8rem;
            color: var(--text-white);
            margin-bottom: 14px;
        }

        .scene-text p {
            color: var(--text-cool-silver);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .scene-img {
            border-radius: var(--radius-md);
            border: 1px solid rgba(0, 240, 255, 0.15);
            box-shadow: 0 0 30px rgba(0, 82, 255, 0.2);
        }

        @media (max-width: 768px) {
            .scene-demo {
                grid-template-columns: 1fr;
            }
        }

        /* Social Proof */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .testimonial-card {
            background: rgba(0, 82, 255, 0.05);
            border: 1px solid rgba(0, 240, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 24px;
            position: relative;
        }

        .testimonial-card::before {
            content: '\201C';
            font-size: 3rem;
            color: var(--accent-neon-cyan);
            opacity: 0.4;
            position: absolute;
            top: 10px;
            left: 18px;
        }

        .testimonial-text {
            font-style: italic;
            color: var(--text-cool-silver);
            margin-bottom: 14px;
            padding-top: 18px;
        }

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

        @media (max-width: 768px) {
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
        }

        /* News Section */
        .news-layout {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 40px;
        }

        .news-list {
            list-style: none;
        }

        .news-list li {
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            padding: 18px 0;
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .news-list li:last-child {
            border-bottom: none;
        }

        .news-date {
            color: var(--accent-neon-cyan);
            font-weight: 600;
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .news-link {
            font-weight: 600;
            color: var(--text-white);
            transition: color var(--transition-fast);
        }

        .news-link:hover {
            color: var(--accent-neon-cyan);
        }

        .news-excerpt {
            font-size: 0.9rem;
            color: var(--text-cool-silver);
            margin-top: 4px;
        }

        .sidebar-recommend {
            background: rgba(13, 17, 30, 0.8);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-md);
            padding: 24px;
        }

        .sidebar-recommend h4 {
            color: var(--accent-neon-cyan);
            font-weight: 700;
            margin-bottom: 16px;
        }

        @media (max-width: 768px) {
            .news-layout {
                grid-template-columns: 1fr;
            }
        }

        /* CTA Form */
        .cta-form-block {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.2), rgba(0, 240, 255, 0.05));
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
            text-align: center;
        }

        .cta-input-group {
            display: flex;
            gap: 12px;
            max-width: 500px;
            margin: 0 auto;
            flex-wrap: wrap;
        }

        .cta-input {
            flex: 1;
            min-width: 220px;
            padding: 14px 18px;
            border-radius: 10px;
            border: 1px solid rgba(0, 240, 255, 0.4);
            background: rgba(8, 9, 15, 0.7);
            color: var(--text-white);
            font-size: 1rem;
        }

        .cta-input:focus {
            outline: none;
            border-color: var(--accent-neon-cyan);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
        }

        .btn-cta {
            background: var(--accent-electric-blue);
            border: none;
            color: #fff;
            padding: 14px 28px;
            border-radius: 10px;
            font-weight: 700;
            cursor: pointer;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-fast);
        }

        .btn-cta:hover {
            background: var(--accent-neon-cyan);
            color: var(--bg-deep-space);
        }

        /* Portal Matrix */
        .portal-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .portal-item {
            background: rgba(0, 82, 255, 0.08);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-md);
            padding: 30px 16px;
            text-align: center;
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .portal-item:hover {
            border-color: var(--accent-neon-cyan);
            box-shadow: var(--shadow-glow);
        }

        .portal-item i {
            font-size: 2rem;
            color: var(--accent-neon-cyan);
            margin-bottom: 12px;
        }

        .portal-item span {
            font-weight: 700;
            color: var(--text-white);
        }

        @media (max-width: 768px) {
            .portal-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        /* Footer */
        .site-footer {
            background: var(--bg-cyber-navy);
            border-top: 1px solid rgba(0, 240, 255, 0.2);
            padding: 50px 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-col h4 {
            color: var(--accent-neon-cyan);
            font-weight: 700;
            margin-bottom: 16px;
        }

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

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

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

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

        .footer-bottom {
            text-align: center;
            color: var(--text-cool-silver);
            font-size: 0.85rem;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
        }

        /* FAB */
        .left-fab {
            position: fixed;
            left: 20px;
            bottom: 100px;
            z-index: 900;
            background: rgba(8, 9, 15, 0.8);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(8,9,15,0.85), rgba(8,9,15,0.85)), linear-gradient(90deg, var(--accent-neon-cyan), var(--accent-electric-blue));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            border-radius: 50px;
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.6);
            cursor: pointer;
            transition: all var(--transition-fast);
            animation: glowPulse 2s infinite;
        }

        .left-fab i {
            color: var(--accent-neon-cyan);
            font-size: 1.5rem;
        }

        @keyframes glowPulse {
            0%, 100% { box-shadow: 0 0 20px rgba(0, 240, 255, 0.5); }
            50% { box-shadow: 0 0 40px rgba(0, 240, 255, 0.9); }
        }

/* roulang page: article */
:root {
        --bg-deep-space: #08090F;
        --bg-cyber-navy: #0D111E;
        --accent-electric-blue: #0052FF;
        --accent-neon-cyan: #00F0FF;
        --text-white: #FFFFFF;
        --text-cool-silver: #CBD5E1;
        --border-glow: rgba(0, 240, 255, 0.3);
        --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
        --radius-md: 12px;
        --radius-lg: 20px;
        --transition-fast: 0.25s ease;
        --font-heading: 'Segoe UI', 'Roboto', 'Open Sans', sans-serif;
        --font-body: 'Inter', 'Segoe UI', 'Roboto', sans-serif;
    }
    * {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    body {
        font-family: var(--font-body);
        background: var(--bg-deep-space);
        color: var(--text-cool-silver);
        line-height: 1.65;
        overflow-x: hidden;
        -webkit-font-smoothing: antialiased;
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    a {
        text-decoration: none;
        color: inherit;
        transition: color var(--transition-fast);
    }
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        background: rgba(8, 9, 15, 0.94);
        backdrop-filter: blur(22px);
        -webkit-backdrop-filter: blur(22px);
        border-bottom: 1px solid rgba(0, 240, 255, 0.18);
        z-index: 1000;
        transition: background var(--transition-fast);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        max-width: 1320px;
        margin: 0 auto;
        padding: 12px 24px;
    }
    .logo {
        font-family: var(--font-heading);
        font-weight: 700;
        font-size: 1.3rem;
        color: var(--text-white);
        letter-spacing: -0.2px;
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }
    .logo i {
        color: var(--accent-neon-cyan);
        font-size: 1.6rem;
        text-shadow: 0 0 14px rgba(0, 240, 255, 0.65);
    }
    .nav-list {
        display: flex;
        align-items: center;
        gap: 30px;
        list-style: none;
    }
    .nav-list li a {
        font-weight: 500;
        font-size: 0.95rem;
        color: var(--text-cool-silver);
        position: relative;
        padding: 6px 0;
        transition: color var(--transition-fast);
        white-space: nowrap;
    }
    .nav-list li a::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 0;
        height: 2px;
        background: var(--accent-neon-cyan);
        transition: width var(--transition-fast);
        box-shadow: 0 0 8px var(--accent-neon-cyan);
    }
    .nav-list li a:hover,
    .nav-list li a.active {
        color: var(--accent-neon-cyan);
    }
    .nav-list li a:hover::after,
    .nav-list li a.active::after {
        width: 100%;
    }
    .nav-actions {
        display: flex;
        align-items: center;
        gap: 14px;
    }
    .btn-login {
        background: transparent;
        border: 1px solid var(--text-cool-silver);
        color: var(--text-white);
        padding: 9px 20px;
        border-radius: 8px;
        font-weight: 600;
        font-size: 0.9rem;
        cursor: pointer;
        transition: all var(--transition-fast);
        white-space: nowrap;
    }
    .btn-login:hover {
        border-color: var(--accent-neon-cyan);
        color: var(--accent-neon-cyan);
        box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
    }
    .btn-signup {
        background: var(--accent-electric-blue);
        border: none;
        color: #fff;
        padding: 10px 24px;
        border-radius: 8px;
        font-weight: 600;
        font-size: 0.9rem;
        cursor: pointer;
        transition: all var(--transition-fast);
        box-shadow: 0 0 15px rgba(0, 82, 255, 0.5);
        white-space: nowrap;
    }
    .btn-signup:hover {
        background: var(--accent-neon-cyan);
        color: var(--bg-deep-space);
        box-shadow: 0 0 28px rgba(0, 240, 255, 0.75);
    }
    .mobile-toggle {
        display: none;
        background: none;
        border: none;
        color: var(--text-white);
        font-size: 1.8rem;
        cursor: pointer;
    }
    .article-header-zone {
        padding: 140px 24px 40px;
        max-width: 900px;
        margin: 0 auto;
    }
    .article-category-tag {
        display: inline-block;
        background: rgba(0, 82, 255, 0.15);
        border: 1px solid rgba(0, 240, 255, 0.35);
        color: var(--accent-neon-cyan);
        font-size: 0.85rem;
        font-weight: 600;
        padding: 6px 16px;
        border-radius: 30px;
        margin-bottom: 18px;
        letter-spacing: 0.4px;
    }
    .article-header-zone h1 {
        font-family: var(--font-heading);
        font-size: 2.6rem;
        font-weight: 800;
        color: var(--text-white);
        line-height: 1.3;
        margin-bottom: 18px;
    }
    .article-meta {
        display: flex;
        gap: 24px;
        font-size: 0.9rem;
        color: var(--text-cool-silver);
        border-bottom: 1px solid rgba(0, 240, 255, 0.12);
        padding-bottom: 22px;
        flex-wrap: wrap;
    }
    .article-body {
        max-width: 820px;
        margin: 0 auto;
        padding: 20px 24px 60px;
    }
    .article-body h2 {
        font-family: var(--font-heading);
        font-size: 1.8rem;
        font-weight: 700;
        color: var(--text-white);
        margin: 36px 0 16px;
        line-height: 1.35;
    }
    .article-body h3 {
        font-family: var(--font-heading);
        font-size: 1.4rem;
        font-weight: 650;
        color: var(--accent-neon-cyan);
        margin: 28px 0 12px;
    }
    .article-body p {
        margin-bottom: 18px;
        font-size: 1.05rem;
        line-height: 1.7;
    }
    .article-body ul,
    .article-body ol {
        margin: 16px 0 22px 24px;
    }
    .article-body li {
        margin-bottom: 8px;
        font-size: 1.02rem;
    }
    .article-body img {
        border-radius: var(--radius-md);
        margin: 28px 0;
        border: 1px solid rgba(0, 240, 255, 0.15);
        box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
    }
    .article-body blockquote {
        background: rgba(0, 82, 255, 0.08);
        border-left: 4px solid var(--accent-neon-cyan);
        padding: 18px 24px;
        border-radius: 0 var(--radius-md) var(--radius-md) 0;
        margin: 28px 0;
        font-style: italic;
        color: var(--text-white);
        box-shadow: 0 0 12px rgba(0, 240, 255, 0.1);
    }
    .cta-inline {
        background: linear-gradient(135deg, rgba(0, 82, 255, 0.1), rgba(0, 240, 255, 0.05));
        border: 1px solid var(--border-glow);
        border-radius: var(--radius-lg);
        padding: 36px 32px;
        margin: 40px 0;
        text-align: left;
        backdrop-filter: blur(10px);
    }
    .cta-inline h3 {
        margin-top: 0;
        font-size: 1.5rem;
    }
    .btn-cta-primary {
        display: inline-block;
        background: var(--accent-electric-blue);
        color: #fff;
        padding: 14px 34px;
        border-radius: 10px;
        font-weight: 700;
        font-size: 1rem;
        margin-top: 16px;
        box-shadow: 0 0 20px rgba(0, 82, 255, 0.55);
        transition: all var(--transition-fast);
    }
    .btn-cta-primary:hover {
        background: var(--accent-neon-cyan);
        color: var(--bg-deep-space);
        box-shadow: 0 0 28px rgba(0, 240, 255, 0.7);
    }
    .not-found-msg {
        text-align: center;
        padding: 80px 24px;
        color: var(--text-cool-silver);
    }
    .not-found-msg h2 {
        font-size: 2rem;
        color: var(--text-white);
        margin-bottom: 16px;
    }
    .site-footer {
        background: rgba(13, 17, 30, 0.7);
        border-top: 1px solid rgba(0, 240, 255, 0.15);
        padding: 50px 24px 24px;
        margin-top: 60px;
        backdrop-filter: blur(16px);
    }
    .footer-grid {
        max-width: 1200px;
        margin: 0 auto;
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 40px;
    }
    .footer-col h4 {
        font-family: var(--font-heading);
        font-size: 1.15rem;
        font-weight: 700;
        color: var(--accent-neon-cyan);
        margin-bottom: 16px;
    }
    .footer-col ul {
        list-style: none;
    }
    .footer-col ul li {
        margin-bottom: 10px;
    }
    .footer-col ul li a {
        color: var(--text-cool-silver);
        transition: color var(--transition-fast);
    }
    .footer-col ul li a:hover {
        color: var(--accent-neon-cyan);
    }
    .footer-bottom {
        max-width: 1200px;
        margin: 30px auto 0;
        padding-top: 20px;
        border-top: 1px solid rgba(0, 240, 255, 0.1);
        text-align: center;
        font-size: 0.9rem;
        color: var(--text-cool-silver);
    }
    /* FAB */
    .fab-left {
        position: fixed;
        left: 20px;
        bottom: 90px;
        width: 52px;
        height: 52px;
        background: rgba(8, 9, 15, 0.7);
        backdrop-filter: blur(14px);
        border: 2px solid transparent;
        background-clip: padding-box;
        border-radius: 50px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--accent-neon-cyan);
        font-size: 1.4rem;
        cursor: pointer;
        z-index: 999;
        box-shadow: 0 0 22px rgba(0, 240, 255, 0.55);
        transition: all var(--transition-fast);
        position: relative;
    }
    .fab-left::before {
        content: '';
        position: absolute;
        inset: -2px;
        border-radius: 50px;
        padding: 2px;
        background: linear-gradient(135deg, #00F0FF, #0052FF);
        -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
        mask-composite: exclude;
        z-index: -1;
    }
    .fab-left:hover {
        transform: scale(1.1);
        box-shadow: 0 0 32px rgba(0, 240, 255, 0.8);
    }
    .fab-notif {
        position: absolute;
        top: -4px;
        right: -4px;
        width: 14px;
        height: 14px;
        background: #FF007F;
        border-radius: 50%;
        box-shadow: 0 0 10px #FF007F;
    }
    @media (max-width: 1024px) {
        .nav-list {
            gap: 18px;
        }
        .article-header-zone h1 {
            font-size: 2rem;
        }
    }
    @media (max-width: 768px) {
        .nav-list {
            display: none;
            flex-direction: column;
            position: absolute;
            top: 70px;
            left: 0;
            width: 100%;
            background: rgba(8, 9, 15, 0.97);
            backdrop-filter: blur(24px);
            padding: 20px 24px;
            gap: 16px;
        }
        .nav-list.active {
            display: flex;
        }
        .mobile-toggle {
            display: block;
        }
        .nav-actions .btn-login,
        .nav-actions .btn-signup {
            padding: 8px 16px;
            font-size: 0.85rem;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 30px;
        }
        .article-header-zone {
            padding-top: 120px;
        }
        .article-header-zone h1 {
            font-size: 1.7rem;
        }
        .article-body {
            padding: 16px 20px 40px;
        }
    }
    @media (max-width: 520px) {
        .header-inner {
            padding: 10px 16px;
        }
        .logo {
            font-size: 1rem;
        }
        .btn-login,
        .btn-signup {
            padding: 6px 14px;
            font-size: 0.8rem;
        }
        .article-meta {
            flex-direction: column;
            gap: 8px;
        }
    }

/* roulang page: category1 */
:root {
            --bg-deep-space: #08090F;
            --bg-cyber-navy: #0D111E;
            --accent-electric-blue: #0052FF;
            --accent-neon-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-cool-silver: #CBD5E1;
            --border-glow: rgba(0, 240, 255, 0.3);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition-fast: 0.25s ease;
            --font-heading: 'Segoe UI', 'Roboto', 'Open Sans', sans-serif;
            --font-body: 'Inter', 'Segoe UI', 'Roboto', sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        body {
            font-family: var(--font-body);
            background: var(--bg-deep-space);
            color: var(--text-cool-silver);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            margin: 0;
            padding: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            z-index: 1000;
            padding: 0;
            transition: background var(--transition-fast);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1320px;
            margin: 0 auto;
            padding: 12px 24px;
        }
        .logo {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--text-white);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .logo i {
            color: var(--accent-neon-cyan);
            font-size: 1.5rem;
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.6);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-list li a {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-cool-silver);
            position: relative;
            padding: 6px 0;
            transition: color var(--transition-fast);
        }
        .nav-list li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-neon-cyan);
            transition: width var(--transition-fast);
            box-shadow: 0 0 8px var(--accent-neon-cyan);
        }
        .nav-list li a:hover,
        .nav-list li a.active {
            color: var(--accent-neon-cyan);
        }
        .nav-list li a:hover::after,
        .nav-list li a.active::after {
            width: 100%;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--text-cool-silver);
            color: var(--text-white);
            padding: 9px 20px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-login:hover {
            border-color: var(--accent-neon-cyan);
            color: var(--accent-neon-cyan);
        }
        .btn-signup {
            background: var(--accent-electric-blue);
            border: none;
            color: #fff;
            padding: 10px 22px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            box-shadow: 0 0 15px rgba(0, 82, 255, 0.5);
        }
        .btn-signup:hover {
            background: var(--accent-neon-cyan);
            color: var(--bg-deep-space);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.8rem;
            cursor: pointer;
        }
        /* Page Banner */
        .page-banner {
            padding: 130px 24px 60px;
            background: linear-gradient(135deg, var(--bg-deep-space) 0%, var(--bg-cyber-navy) 100%);
            position: relative;
            overflow: hidden;
            text-align: left;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 70%);
            z-index: 0;
        }
        .banner-content {
            position: relative;
            z-index: 1;
        }
        .banner-content h1 {
            font-family: var(--font-heading);
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 15px;
            line-height: 1.3;
        }
        .banner-content p {
            font-size: 1.1rem;
            color: var(--text-cool-silver);
            max-width: 700px;
            line-height: 1.7;
        }
        /* Metrics Dashboard */
        .metrics-dashboard {
            padding: 40px 0;
            background: var(--bg-cyber-navy);
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
            text-align: center;
        }
        .metric-card {
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(10px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 30px 20px;
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
        }
        .metric-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-glow);
        }
        .metric-icon {
            font-size: 2.5rem;
            color: var(--accent-neon-cyan);
            margin-bottom: 15px;
        }
        .metric-value {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-white);
            display: block;
        }
        .metric-label {
            font-size: 0.95rem;
            color: var(--text-cool-silver);
            margin-top: 5px;
        }
        /* Review Matrix */
        .review-matrix {
            padding: 70px 0;
        }
        .section-title {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 15px;
            text-align: left;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-cool-silver);
            margin-bottom: 45px;
            max-width: 700px;
            line-height: 1.7;
        }
        .review-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid var(--border-glow);
            padding: 5px;
        }
        .review-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 800px;
        }
        .review-table th {
            background: var(--accent-electric-blue);
            color: #fff;
            font-weight: 600;
            padding: 16px 18px;
            text-align: left;
            font-size: 0.95rem;
            white-space: nowrap;
        }
        .review-table td {
            padding: 16px 18px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            color: var(--text-cool-silver);
            font-size: 0.9rem;
        }
        .review-table tr:hover td {
            background: rgba(0, 240, 255, 0.04);
        }
        .rating-stars {
            color: var(--accent-neon-cyan);
            font-size: 1.1rem;
            letter-spacing: 2px;
        }
        .badge-app {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-neon-cyan);
            border: 1px solid var(--accent-neon-cyan);
        }
        .btn-download-sm {
            display: inline-block;
            padding: 7px 18px;
            border-radius: 6px;
            background: var(--accent-electric-blue);
            color: #fff;
            font-weight: 600;
            font-size: 0.85rem;
            transition: all var(--transition-fast);
            box-shadow: 0 0 10px rgba(0, 82, 255, 0.3);
        }
        .btn-download-sm:hover {
            background: var(--accent-neon-cyan);
            color: var(--bg-deep-space);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
        }
        /* Comparison Section */
        .comparison-section {
            padding: 70px 0;
            background: var(--bg-cyber-navy);
        }
        .comparison-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .compare-card {
            background: rgba(255, 255, 255, 0.02);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-lg);
            padding: 35px 25px;
            transition: transform var(--transition-fast), border-color var(--transition-fast);
        }
        .compare-card:hover {
            transform: translateY(-6px);
            border-color: var(--accent-neon-cyan);
            box-shadow: var(--shadow-glow);
        }
        .compare-card h3 {
            font-family: var(--font-heading);
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 15px;
        }
        .compare-card .pros-cons {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .compare-card .pros-cons li {
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.93rem;
            color: var(--text-cool-silver);
        }
        .compare-card .pros-cons li i.fa-check {
            color: #00CC66;
            margin-right: 8px;
        }
        .compare-card .pros-cons li i.fa-times {
            color: #FF4444;
            margin-right: 8px;
        }
        /* FAQ */
        .faq-section {
            padding: 70px 0;
        }
        .faq-list {
            max-width: 850px;
        }
        .faq-item {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--accent-neon-cyan);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 20px 24px;
            text-align: left;
            color: var(--text-white);
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-family: var(--font-body);
        }
        .faq-question i {
            color: var(--accent-neon-cyan);
            transition: transform var(--transition-fast);
        }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-cool-silver);
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        /* CTA */
        .cta-section {
            padding: 70px 0;
            background: linear-gradient(135deg, var(--bg-cyber-navy), var(--bg-deep-space));
            text-align: left;
        }
        .cta-box {
            background: rgba(0, 82, 255, 0.08);
            border: 2px solid var(--accent-electric-blue);
            border-radius: var(--radius-lg);
            padding: 45px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
            flex-wrap: wrap;
        }
        .cta-box h2 {
            font-family: var(--font-heading);
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 0;
            flex: 1;
        }
        .cta-box .btn-cta-large {
            background: var(--accent-neon-cyan);
            color: var(--bg-deep-space);
            padding: 16px 35px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: all var(--transition-fast);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.4);
            white-space: nowrap;
        }
        .cta-box .btn-cta-large:hover {
            background: #fff;
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.7);
            transform: scale(1.03);
        }
        /* Footer */
        .site-footer {
            background: var(--bg-cyber-navy);
            border-top: 1px solid var(--border-glow);
            padding: 50px 0 20px;
            color: var(--text-cool-silver);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
            margin-bottom: 35px;
        }
        .footer-col h4 {
            font-family: var(--font-heading);
            color: var(--text-white);
            font-weight: 700;
            margin-bottom: 15px;
            font-size: 1.1rem;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-cool-silver);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--accent-neon-cyan);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.85rem;
        }
        /* FAB */
        .fab-floating {
            position: fixed;
            left: 20px;
            bottom: 90px;
            z-index: 999;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.75);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-neon-cyan);
            font-size: 1.6rem;
            cursor: pointer;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            transition: all var(--transition-fast);
            animation: breathe 2.5s infinite;
        }
        .fab-floating::before {
            content: '';
            position: absolute;
            top: -3px;
            left: -3px;
            right: -3px;
            bottom: -3px;
            border-radius: 50%;
            background: linear-gradient(135deg, #00F0FF, #0052FF);
            z-index: -1;
            opacity: 0.7;
        }
        .fab-floating:hover {
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.8);
            opacity: 1;
        }
        @keyframes breathe {
            0% { opacity: 0.7; }
            50% { opacity: 1; }
            100% { opacity: 0.7; }
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .comparison-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cta-box {
                flex-direction: column;
                text-align: center;
            }
            .page-banner h1 {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            .nav-list {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.97);
                backdrop-filter: blur(24px);
                padding: 20px 24px;
                gap: 16px;
            }
            .nav-list.active {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
            }
            .comparison-grid {
                grid-template-columns: 1fr;
            }
            .review-table-wrap {
                font-size: 0.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .page-banner {
                padding: 120px 20px 50px;
            }
            .banner-content h1 {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 520px) {
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .cta-box h2 {
                font-size: 1.4rem;
            }
            .header-inner {
                padding: 10px 15px;
            }
            .logo {
                font-size: 1.1rem;
            }
        }

/* roulang page: category2 */
:root {
            --bg-deep-space: #08090F;
            --bg-cyber-navy: #0D111E;
            --accent-electric-blue: #0052FF;
            --accent-neon-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-cool-silver: #CBD5E1;
            --border-glow: rgba(0, 240, 255, 0.3);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition-fast: 0.25s ease;
            --font-heading: 'Segoe UI', 'Roboto', 'Open Sans', sans-serif;
            --font-body: 'Inter', 'Segoe UI', 'Roboto', sans-serif;
            --glass-bg: rgba(13, 17, 30, 0.65);
            --glass-border: rgba(0, 240, 255, 0.2);
            --glass-blur: blur(16px);
        }
        * {
            box-sizing: border-box;
        }
        body {
            font-family: var(--font-body);
            background: var(--bg-deep-space);
            color: var(--text-cool-silver);
            line-height: 1.65;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            z-index: 1000;
            padding: 0;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1320px;
            margin: 0 auto;
            padding: 12px 24px;
        }
        .logo {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.3rem;
            color: var(--text-white);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .logo i {
            color: var(--accent-neon-cyan);
            font-size: 1.5rem;
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.6);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-list li a {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-cool-silver);
            position: relative;
            padding: 6px 0;
            transition: color var(--transition-fast);
        }
        .nav-list li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-neon-cyan);
            transition: width var(--transition-fast);
            box-shadow: 0 0 8px var(--accent-neon-cyan);
        }
        .nav-list li a:hover,
        .nav-list li a.active {
            color: var(--accent-neon-cyan);
        }
        .nav-list li a:hover::after,
        .nav-list li a.active::after {
            width: 100%;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--text-cool-silver);
            color: var(--text-white);
            padding: 9px 20px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-login:hover {
            border-color: var(--accent-neon-cyan);
            color: var(--accent-neon-cyan);
        }
        .btn-signup {
            background: var(--accent-electric-blue);
            border: none;
            color: #fff;
            padding: 10px 22px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            box-shadow: 0 0 15px rgba(0, 82, 255, 0.5);
            white-space: nowrap;
        }
        .btn-signup:hover {
            background: var(--accent-neon-cyan);
            color: var(--bg-deep-space);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.8rem;
            cursor: pointer;
        }
        @media (max-width: 1024px) {
            .nav-list {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.97);
                backdrop-filter: blur(24px);
                padding: 20px 24px;
                gap: 16px;
                z-index: 999;
            }
            .nav-list.active {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
        }
        .page-banner {
            padding: 120px 24px 60px;
            background: linear-gradient(135deg, var(--bg-deep-space) 0%, #0A1A3A 100%);
            position: relative;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            top: -20%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.2) 0%, transparent 70%);
            z-index: 0;
        }
        .banner-container {
            max-width: 1200px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }
        .banner-content h1 {
            font-family: var(--font-heading);
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .banner-content p {
            font-size: 1.15rem;
            color: var(--text-cool-silver);
            max-width: 700px;
            margin-bottom: 0;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 70px 0;
        }
        .section-dark {
            background: var(--bg-cyber-navy);
        }
        .section-title {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            text-align: left;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-cool-silver);
            margin-bottom: 40px;
            text-align: left;
            max-width: 700px;
        }
        .step-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        .step-card {
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 30px;
            position: relative;
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
        }
        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.2);
            border-color: var(--accent-neon-cyan);
        }
        .step-number {
            font-family: var(--font-heading);
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--accent-neon-cyan);
            opacity: 0.8;
            margin-bottom: 12px;
            line-height: 1;
        }
        .step-card h3 {
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .step-card p {
            font-size: 1rem;
            color: var(--text-cool-silver);
            line-height: 1.6;
            margin: 0;
        }
        .platform-tabs {
            display: flex;
            gap: 16px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }
        .platform-tab {
            padding: 12px 32px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            background: rgba(0, 82, 255, 0.15);
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--text-cool-silver);
        }
        .platform-tab.active,
        .platform-tab:hover {
            background: var(--accent-electric-blue);
            color: #fff;
            border-color: var(--accent-neon-cyan);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
        }
        .download-card {
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 40px 30px;
            text-align: left;
            position: relative;
            overflow: hidden;
        }
        .download-card.highlighted {
            border-color: var(--accent-neon-cyan);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.35);
            background: rgba(0, 240, 255, 0.05);
        }
        .download-card h3 {
            font-family: var(--font-heading);
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 10px;
        }
        .download-card .badge {
            display: inline-block;
            background: var(--accent-electric-blue);
            color: #fff;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .download-card .file-info {
            font-size: 0.95rem;
            color: var(--text-cool-silver);
            margin-bottom: 24px;
        }
        .btn-download {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-electric-blue);
            color: #fff;
            padding: 14px 32px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition-fast);
            box-shadow: 0 0 20px rgba(0, 82, 255, 0.5);
            border: none;
            cursor: pointer;
        }
        .btn-download:hover {
            background: var(--accent-neon-cyan);
            color: var(--bg-deep-space);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
        }
        .requirements-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .req-card {
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: left;
        }
        .req-card i {
            font-size: 1.8rem;
            color: var(--accent-neon-cyan);
            margin-bottom: 12px;
        }
        .req-card h4 {
            font-family: var(--font-heading);
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
        }
        .req-card p {
            font-size: 0.95rem;
            color: var(--text-cool-silver);
            margin: 0;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--accent-neon-cyan);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 20px 24px;
            font-family: var(--font-heading);
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-white);
            text-align: left;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-cool-silver);
            font-size: 0.95rem;
            line-height: 1.6;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }
        .cta-section {
            background: linear-gradient(135deg, #0A1A3A 0%, var(--bg-cyber-navy) 100%);
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
            text-align: left;
        }
        .cta-section h2 {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: var(--text-cool-silver);
            margin-bottom: 28px;
            max-width: 600px;
        }
        .site-footer {
            background: var(--bg-cyber-navy);
            border-top: 1px solid rgba(0, 240, 255, 0.2);
            padding: 50px 24px 24px;
            margin-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 40px;
            max-width: 1200px;
            margin: 0 auto 40px;
        }
        .footer-col h4 {
            font-family: var(--font-heading);
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-cool-silver);
            font-size: 0.95rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--accent-neon-cyan);
        }
        .footer-bottom {
            text-align: center;
            color: var(--text-cool-silver);
            font-size: 0.9rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            max-width: 1200px;
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .banner-content h1 {
                font-size: 1.8rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .download-card {
                padding: 30px 20px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-deep-space: #08090F;
            --bg-cyber-navy: #0D111E;
            --accent-electric-blue: #0052FF;
            --accent-neon-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-cool-silver: #CBD5E1;
            --border-glow: rgba(0, 240, 255, 0.3);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition-fast: 0.25s ease;
            --font-heading: 'Segoe UI', 'Roboto', 'Open Sans', sans-serif;
            --font-body: 'Inter', 'Segoe UI', 'Roboto', sans-serif;
        }

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

        body {
            font-family: var(--font-body);
            background: var(--bg-deep-space);
            color: var(--text-cool-silver);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

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

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

        ul {
            list-style: none;
        }

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

        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            z-index: 1000;
            padding: 0 0;
            transition: background var(--transition-fast);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1320px;
            margin: 0 auto;
            padding: 12px 24px;
        }

        .logo {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--text-white);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .logo i {
            color: var(--accent-neon-cyan);
            font-size: 1.5rem;
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.6);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-list li a {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-cool-silver);
            position: relative;
            padding: 6px 0;
            transition: color var(--transition-fast);
        }

        .nav-list li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-neon-cyan);
            transition: width var(--transition-fast);
            box-shadow: 0 0 8px var(--accent-neon-cyan);
        }

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

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

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

        .btn-login {
            background: transparent;
            border: 1px solid var(--text-cool-silver);
            color: var(--text-white);
            padding: 9px 20px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

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

        .btn-signup {
            background: var(--accent-electric-blue);
            border: none;
            color: #fff;
            padding: 10px 22px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            box-shadow: 0 0 15px rgba(0, 82, 255, 0.5);
        }

        .btn-signup:hover {
            background: var(--accent-neon-cyan);
            color: var(--bg-deep-space);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.8rem;
            cursor: pointer;
        }

        @media (max-width: 1024px) {
            .nav-list {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.97);
                backdrop-filter: blur(24px);
                padding: 20px 24px;
                gap: 16px;
                z-index: 999;
            }

            .nav-list.active {
                display: flex;
            }

            .mobile-toggle {
                display: block;
            }
        }

        @media (max-width: 520px) {
            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                padding: 8px 14px;
                font-size: 0.8rem;
            }
            .logo {
                font-size: 1.1rem;
            }
        }

        /* Hero - Invite & Reward */
        .hero-section {
            padding: 140px 24px 80px;
            background: linear-gradient(135deg, var(--bg-deep-space) 0%, var(--bg-cyber-navy) 100%);
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -15%;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.12) 0%, transparent 70%);
            z-index: 0;
        }

        .hero-container {
            max-width: 1200px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .hero-text h1 {
            font-family: var(--font-heading);
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.25;
            margin-bottom: 20px;
        }

        .hero-text h1 span {
            color: var(--accent-neon-cyan);
            text-shadow: 0 0 18px rgba(0, 240, 255, 0.5);
        }

        .hero-text p {
            font-size: 1.1rem;
            color: var(--text-cool-silver);
            margin-bottom: 30px;
            line-height: 1.6;
        }

        .invite-progress {
            background: rgba(13, 17, 30, 0.8);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-md);
            padding: 20px;
            margin-bottom: 24px;
            backdrop-filter: blur(10px);
        }

        .progress-label {
            display: flex;
            justify-content: space-between;
            color: var(--text-cool-silver);
            font-size: 0.9rem;
            margin-bottom: 10px;
        }

        .progress-bar {
            width: 100%;
            height: 10px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 20px;
            overflow: hidden;
        }

        .progress-fill {
            width: 65%;
            height: 100%;
            background: linear-gradient(90deg, var(--accent-electric-blue), var(--accent-neon-cyan));
            border-radius: 20px;
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.6);
        }

        .reward-badges {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 12px;
        }

        .reward-badge {
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--accent-neon-cyan);
            color: var(--accent-neon-cyan);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        .btn-cta-large {
            background: var(--accent-electric-blue);
            border: none;
            color: #fff;
            padding: 14px 32px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 1.05rem;
            cursor: pointer;
            box-shadow: 0 0 20px rgba(0, 82, 255, 0.5);
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-cta-large:hover {
            background: var(--accent-neon-cyan);
            color: var(--bg-deep-space);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
            transform: translateY(-2px);
        }

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

        .hero-image img {
            border-radius: var(--radius-lg);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6);
            border: 1px solid rgba(0, 240, 255, 0.2);
            max-height: 400px;
            object-fit: cover;
        }

        @media (max-width: 768px) {
            .hero-container {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-text h1 {
                font-size: 2rem;
            }
            .hero-image {
                order: -1;
            }
        }

        /* Stats Board */
        .stats-dashboard {
            padding: 60px 0;
            background: var(--bg-cyber-navy);
            position: relative;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .stat-card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-md);
            padding: 30px 20px;
            transition: all var(--transition-fast);
        }

        .stat-card:hover {
            border-color: var(--accent-neon-cyan);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.15);
            transform: translateY(-4px);
        }

        .stat-number {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent-neon-cyan);
            margin-bottom: 8px;
            text-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
        }

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

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Strategy Cards */
        .strategy-section {
            padding: 80px 0;
            background: var(--bg-deep-space);
        }

        .section-title {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            text-align: left;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-cool-silver);
            margin-bottom: 50px;
            max-width: 700px;
        }

        .strategy-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .strategy-card {
            background: rgba(13, 17, 30, 0.7);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all var(--transition-fast);
            backdrop-filter: blur(8px);
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .strategy-card:hover {
            border-color: var(--accent-neon-cyan);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.2);
            transform: translateY(-6px);
        }

        .strategy-icon {
            font-size: 2.2rem;
            color: var(--accent-neon-cyan);
            margin-bottom: 4px;
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.5);
        }

        .strategy-card h3 {
            font-family: var(--font-heading);
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
        }

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

        .strategy-tag {
            display: inline-block;
            background: rgba(0, 82, 255, 0.2);
            color: var(--accent-electric-blue);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            align-self: flex-start;
        }

        @media (max-width: 992px) {
            .strategy-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 600px) {
            .strategy-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Comparison Table */
        .comparison-section {
            padding: 80px 0;
            background: var(--bg-cyber-navy);
        }

        .comparison-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-md);
            border: 1px solid rgba(0, 240, 255, 0.15);
        }

        table {
            width: 100%;
            border-collapse: collapse;
            min-width: 700px;
            background: rgba(8, 9, 15, 0.7);
        }

        th {
            background: rgba(0, 82, 255, 0.2);
            color: var(--text-white);
            font-weight: 700;
            padding: 16px;
            text-align: left;
            border-bottom: 1px solid rgba(0, 240, 255, 0.3);
        }

        td {
            padding: 14px 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            color: var(--text-cool-silver);
        }

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

        .highlight-row td {
            color: var(--accent-neon-cyan);
            font-weight: 600;
        }

        /* FAQ */
        .faq-section {
            padding: 80px 0;
            background: var(--bg-deep-space);
        }

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

        .faq-item {
            background: rgba(13, 17, 30, 0.6);
            border: 1px solid rgba(0, 240, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--accent-neon-cyan);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.1);
        }

        .faq-item h4 {
            font-family: var(--font-heading);
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 12px;
            font-size: 1.1rem;
        }

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

        @media (max-width: 768px) {
            .faq-grid {
                grid-template-columns: 1fr;
            }
        }

        /* CTA */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--bg-cyber-navy), var(--bg-deep-space));
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 400px;
            height: 200px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.15) 0%, transparent 70%);
            z-index: 0;
        }

        .cta-box {
            position: relative;
            z-index: 1;
            background: rgba(0, 0, 0, 0.4);
            backdrop-filter: blur(16px);
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
            max-width: 800px;
            margin: 0 auto;
        }

        .cta-box h2 {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
        }

        .cta-box p {
            color: var(--text-cool-silver);
            margin-bottom: 30px;
            font-size: 1.05rem;
        }

        .btn-glow {
            background: var(--accent-neon-cyan);
            color: var(--bg-deep-space);
            border: none;
            padding: 14px 36px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.6);
            transition: all var(--transition-fast);
        }

        .btn-glow:hover {
            box-shadow: 0 0 45px rgba(0, 240, 255, 0.9);
            transform: scale(1.03);
        }

        /* Footer */
        .site-footer {
            background: #05070D;
            padding: 60px 0 30px;
            border-top: 1px solid rgba(0, 240, 255, 0.15);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            max-width: 1200px;
            margin: 0 auto 40px;
            padding: 0 20px;
        }

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

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

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

        .footer-bottom {
            text-align: center;
            color: var(--text-cool-silver);
            font-size: 0.85rem;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            background: rgba(0, 0, 0, 0.65);
            backdrop-filter: blur(12px);
            border: 1px solid var(--accent-neon-cyan);
            border-radius: 50px;
            padding: 12px 18px;
            color: var(--accent-neon-cyan);
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.35);
            display: flex;
            align-items: center;
            gap: 8px;
            transition: all var(--transition-fast);
        }

        .fab-left:hover {
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.65);
            transform: scale(1.05);
        }

        @media (max-width: 520px) {
            .fab-left {
                bottom: 80px;
                left: 12px;
                padding: 10px 14px;
                font-size: 0.8rem;
            }
        }

/* roulang page: category3 */
:root {
            --bg-deep-space: #08090F;
            --bg-cyber-navy: #0D111E;
            --accent-electric-blue: #0052FF;
            --accent-neon-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-cool-silver: #CBD5E1;
            --border-glow: rgba(0, 240, 255, 0.3);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition-fast: 0.25s ease;
            --font-heading: 'Segoe UI', 'Roboto', 'Open Sans', sans-serif;
            --font-body: 'Inter', 'Segoe UI', 'Roboto', sans-serif;
        }

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

        body {
            font-family: var(--font-body);
            background: var(--bg-deep-space);
            color: var(--text-cool-silver);
            line-height: 1.65;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            padding-top: 70px;
        }

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

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

        h1, h2, h3, h4, h5 {
            font-family: var(--font-heading);
            color: var(--text-white);
            line-height: 1.3;
        }

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

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(8, 9, 15, 0.94);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            z-index: 1000;
            transition: background var(--transition-fast);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1320px;
            margin: 0 auto;
            padding: 12px 24px;
        }

        .logo {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--text-white);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .logo i {
            color: var(--accent-neon-cyan);
            font-size: 1.5rem;
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.6);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
        }

        .nav-list li a {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-cool-silver);
            position: relative;
            padding: 6px 0;
            transition: color var(--transition-fast);
        }

        .nav-list li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-neon-cyan);
            transition: width var(--transition-fast);
            box-shadow: 0 0 8px var(--accent-neon-cyan);
        }

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

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

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

        .btn-login {
            background: transparent;
            border: 1px solid var(--text-cool-silver);
            color: var(--text-white);
            padding: 9px 20px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

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

        .btn-signup {
            background: var(--accent-electric-blue);
            border: none;
            color: #fff;
            padding: 10px 22px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            box-shadow: 0 0 15px rgba(0, 82, 255, 0.5);
            white-space: nowrap;
        }

        .btn-signup:hover {
            background: var(--accent-neon-cyan);
            color: var(--bg-deep-space);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.8rem;
            cursor: pointer;
        }

        @media (max-width: 1024px) {
            .nav-list {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.97);
                backdrop-filter: blur(24px);
                padding: 20px 24px;
                gap: 16px;
                z-index: 999;
            }
            .nav-list.active {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
        }

        /* Hero Section */
        .page-hero {
            background: linear-gradient(135deg, #0D111E 0%, #0A0E1A 100%);
            padding: 60px 24px 70px;
            position: relative;
            border-bottom: 1px solid var(--border-glow);
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.12) 0%, transparent 70%);
            z-index: 0;
        }

        .hero-container {
            max-width: 1200px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .hero-text h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 18px;
        }

        .hero-text h1 span {
            color: var(--accent-neon-cyan);
            text-shadow: 0 0 18px rgba(0, 240, 255, 0.5);
        }

        .hero-text p {
            font-size: 1.1rem;
            color: var(--text-cool-silver);
            margin-bottom: 28px;
            line-height: 1.7;
        }

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

        .hero-visual img {
            border-radius: var(--radius-lg);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.2);
            max-width: 100%;
        }

        .btn-primary {
            display: inline-block;
            background: var(--accent-electric-blue);
            color: #fff;
            font-weight: 700;
            font-size: 1.05rem;
            padding: 14px 32px;
            border-radius: 10px;
            box-shadow: 0 0 20px rgba(0, 82, 255, 0.5);
            transition: all var(--transition-fast);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            background: var(--accent-neon-cyan);
            color: var(--bg-deep-space);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.8);
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .hero-container {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .hero-text h1 {
                font-size: 2rem;
            }
            .hero-visual {
                order: -1;
            }
        }

        /* Metrics Panel */
        .metrics-panel {
            background: rgba(13, 17, 30, 0.7);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 40px 24px;
            margin: -30px auto 40px;
            max-width: 1100px;
            position: relative;
            z-index: 2;
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .metric-item {
            padding: 16px;
        }

        .metric-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-neon-cyan);
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
        }

        .metric-label {
            color: var(--text-cool-silver);
            font-size: 0.9rem;
            margin-top: 6px;
        }

        @media (max-width: 768px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        /* Strategy Matrix Section */
        .strategy-section {
            padding: 60px 24px;
            background: var(--bg-deep-space);
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 40px;
            text-align: left;
            position: relative;
        }

        .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 3px;
            background: var(--accent-neon-cyan);
            margin-top: 12px;
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.6);
        }

        .strategy-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        .strategy-card {
            background: rgba(13, 17, 30, 0.65);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-lg);
            padding: 32px;
            transition: all var(--transition-fast);
        }

        .strategy-card:hover {
            border-color: var(--accent-neon-cyan);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
            transform: translateY(-4px);
        }

        .strategy-icon {
            font-size: 2.2rem;
            color: var(--accent-neon-cyan);
            margin-bottom: 16px;
            text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
        }

        .strategy-card h3 {
            font-size: 1.4rem;
            margin-bottom: 10px;
        }

        .strategy-card p {
            color: var(--text-cool-silver);
            line-height: 1.7;
        }

        .highlight-tag {
            display: inline-block;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-neon-cyan);
            border: 1px solid rgba(0, 240, 255, 0.3);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        @media (max-width: 768px) {
            .strategy-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Comparison Section */
        .compare-section {
            padding: 60px 24px;
            background: linear-gradient(180deg, #0A0E1A 0%, #0D111E 100%);
        }

        .compare-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-glow);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            background: rgba(13, 17, 30, 0.5);
            backdrop-filter: blur(8px);
        }

        .compare-table th {
            background: rgba(0, 82, 255, 0.15);
            color: var(--text-white);
            font-weight: 700;
            padding: 16px;
            text-align: left;
            border-bottom: 2px solid var(--accent-electric-blue);
        }

        .compare-table td {
            padding: 14px 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            color: var(--text-cool-silver);
        }

        .compare-table .recommended-row {
            background: rgba(0, 240, 255, 0.06);
            border-left: 3px solid var(--accent-neon-cyan);
        }

        .badge-best {
            background: var(--accent-neon-cyan);
            color: var(--bg-deep-space);
            font-weight: 700;
            padding: 3px 10px;
            border-radius: 6px;
            font-size: 0.8rem;
        }

        /* FAQ */
        .faq-section {
            padding: 60px 24px;
        }

        .faq-list {
            max-width: 900px;
        }

        .faq-item {
            background: rgba(13, 17, 30, 0.5);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-fast);
        }

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

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            color: var(--text-white);
            font-weight: 600;
            font-size: 1.05rem;
            padding: 20px 24px;
            text-align: left;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-cool-silver);
            line-height: 1.7;
            display: none;
        }

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

        /* CTA */
        .cta-section {
            padding: 70px 24px;
            background: linear-gradient(135deg, #0D111E 0%, #08090F 100%);
            text-align: center;
            border-top: 1px solid var(--border-glow);
            border-bottom: 1px solid var(--border-glow);
        }

        .cta-section h2 {
            font-size: 2.2rem;
            margin-bottom: 18px;
        }

        .cta-section p {
            font-size: 1.1rem;
            margin-bottom: 28px;
            color: var(--text-cool-silver);
        }

        .btn-cta-large {
            display: inline-block;
            background: var(--accent-electric-blue);
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            padding: 16px 40px;
            border-radius: 12px;
            box-shadow: 0 0 25px rgba(0, 82, 255, 0.6);
            transition: all var(--transition-fast);
            border: none;
            cursor: pointer;
        }

        .btn-cta-large:hover {
            background: var(--accent-neon-cyan);
            color: var(--bg-deep-space);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.8);
            transform: scale(1.03);
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 24px;
            bottom: 90px;
            z-index: 50;
            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-neon-cyan);
            font-size: 1.5rem;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.4);
            cursor: pointer;
            transition: all var(--transition-fast);
            animation: pulse-fab 2.5s infinite;
        }

        .fab:hover {
            border-color: var(--accent-neon-cyan);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
            transform: scale(1.1);
        }

        @keyframes pulse-fab {
            0%, 100% { box-shadow: 0 0 15px rgba(0, 240, 255, 0.4); }
            50% { box-shadow: 0 0 28px rgba(0, 240, 255, 0.7); }
        }

        /* Footer */
        .site-footer {
            background: #06070D;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 50px 24px 24px;
            color: var(--text-cool-silver);
        }

        .footer-grid {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 30px;
        }

        .footer-col h4 {
            color: var(--text-white);
            margin-bottom: 14px;
            font-size: 1.1rem;
        }

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

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

        .footer-col ul li a {
            color: var(--text-cool-silver);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            max-width: 1200px;
            margin: 0 auto;
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            font-size: 0.85rem;
            color: var(--text-cool-silver);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }