/* roulang page: index */
:root {
            --primary: #00F0FF;
            --primary-dark: #00B8D4;
            --accent: #CCFF00;
            --accent-dark: #A8D600;
            --bg: #0F0C20;
            --bg-secondary: #0B1A30;
            --surface: rgba(255, 255, 255, 0.05);
            --surface-hover: rgba(255, 255, 255, 0.08);
            --border: rgba(0, 240, 255, 0.25);
            --text: #FFFFFF;
            --text-secondary: #A6ACAF;
            --text-muted: #7A8093;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 24px rgba(0, 240, 255, 0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

        ::selection {
            background: rgba(0, 240, 255, 0.3);
            color: var(--text);
        }

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

        /* Navbar */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(15, 12, 32, 0.9);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }

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

        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            color: var(--text);
            font-weight: 700;
            font-size: 1.15rem;
            letter-spacing: -0.02em;
            transition: var(--transition);
        }

        .navbar-brand:hover {
            color: var(--primary);
        }

        .navbar-brand .brand-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 10px;
            color: var(--bg);
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        .navbar-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }

        .navbar-nav a {
            display: inline-flex;
            align-items: center;
            padding: 10px 18px;
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 500;
            border-radius: 8px;
            transition: var(--transition);
            position: relative;
        }

        .navbar-nav a:hover {
            color: var(--text);
            background: var(--surface);
        }

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

        .navbar-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 6px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

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

        .btn-login {
            display: inline-flex;
            align-items: center;
            padding: 10px 16px;
            color: var(--text);
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 600;
            border-radius: 8px;
            transition: var(--transition);
            background: transparent;
            border: none;
            cursor: pointer;
        }

        .btn-login:hover {
            color: var(--primary);
            background: var(--surface);
        }

        .btn-signup {
            display: inline-flex;
            align-items: center;
            padding: 10px 20px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: var(--bg);
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 700;
            border-radius: 8px;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.3);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.5);
        }

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

        /* Hero */
        .hero {
            padding: 140px 0 80px;
            background: linear-gradient(180deg, var(--bg) 0%, var(--bg-secondary) 50%, var(--bg) 100%);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -20%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.15), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -15%;
            left: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(204, 255, 0, 0.1), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .hero-content {
            max-width: 700px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border);
            border-radius: 100px;
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .hero h1 {
            font-size: clamp(2.5rem, 5vw, 4rem);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
            background: linear-gradient(135deg, var(--text), var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 560px;
        }

        .hero-cta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 40px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: var(--bg);
            text-decoration: none;
            font-size: 1rem;
            font-weight: 700;
            border-radius: 12px;
            transition: var(--transition);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.4);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(0, 240, 255, 0.6);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            background: var(--surface);
            color: var(--text);
            text-decoration: none;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 12px;
            transition: var(--transition);
            border: 1px solid var(--border);
        }

        .btn-secondary:hover {
            background: var(--surface-hover);
            border-color: var(--primary);
            transform: translateY(-3px);
        }

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

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

        .hero-stat .stat-value {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
        }

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

        /* Progress ring */
        .progress-ring-wrap {
            display: flex;
            align-items: center;
            gap: 24px;
            margin-bottom: 24px;
        }

        .progress-ring {
            width: 100px;
            height: 100px;
            position: relative;
            flex-shrink: 0;
        }

        .progress-ring svg {
            width: 100%;
            height: 100%;
            transform: rotate(-90deg);
        }

        .progress-ring .bg-circle {
            fill: none;
            stroke: rgba(255, 255, 255, 0.1);
            stroke-width: 8;
        }

        .progress-ring .fg-circle {
            fill: none;
            stroke: var(--primary);
            stroke-width: 8;
            stroke-linecap: round;
            stroke-dasharray: 251.2;
            stroke-dashoffset: 62.8;
            transition: stroke-dashoffset 0.8s ease;
        }

        .progress-ring .ring-text {
            position: absolute;
            inset: 0;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--text);
        }

        /* Sections */
        section {
            padding: 80px 0;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .section-title {
            font-size: clamp(1.8rem, 3.5vw, 2.5rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
            color: var(--text);
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 650px;
            margin-bottom: 40px;
        }

        /* Product screenshot stage */
        .stage-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .stage-image {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-glow);
        }

        .stage-image img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
            aspect-ratio: 16/10;
        }

        .stage-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.1), transparent 50%);
            pointer-events: none;
        }

        .stage-content {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .stage-features {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .stage-feature {
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }

        .stage-feature .feature-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 240, 255, 0.1);
            border-radius: 10px;
            color: var(--primary);
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .stage-feature h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .stage-feature p {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        /* Steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .step-card {
            background: var(--surface);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius);
            padding: 28px;
            transition: var(--transition);
            position: relative;
        }

        .step-card:hover {
            background: var(--surface-hover);
            border-color: var(--border);
            transform: translateY(-4px);
        }

        .step-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: rgba(0, 240, 255, 0.2);
            margin-bottom: 12px;
            line-height: 1;
        }

        .step-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        /* Reviews */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .review-card {
            background: var(--surface);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius);
            padding: 24px;
            transition: var(--transition);
        }

        .review-card:hover {
            background: var(--surface-hover);
            border-color: var(--border);
        }

        .review-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }

        .review-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--bg);
            font-size: 1.1rem;
        }

        .review-info h4 {
            font-size: 0.95rem;
            font-weight: 700;
        }

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

        .review-stars {
            color: var(--accent);
            margin-bottom: 8px;
        }

        .review-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-style: italic;
        }

        /* News */
        .news-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 32px;
            margin-top: 40px;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px;
            background: var(--surface);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            text-decoration: none;
            color: var(--text);
        }

        .news-item:hover {
            background: var(--surface-hover);
            border-color: var(--border);
            transform: translateX(4px);
        }

        .news-item .news-date {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-width: 56px;
            height: 56px;
            background: rgba(0, 240, 255, 0.1);
            border-radius: 8px;
            flex-shrink: 0;
        }

        .news-item .news-date .day {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--primary);
        }

        .news-item .news-date .month {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .news-item .news-info {
            flex: 1;
        }

        .news-item .news-info h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .news-item .news-info p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin: 0;
        }

        .news-item .news-arrow {
            color: var(--primary);
            flex-shrink: 0;
        }

        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-sidebar-card {
            background: var(--surface);
            border-radius: var(--radius-sm);
            padding: 20px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .news-sidebar-card h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--primary);
        }

        .news-sidebar-card ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .news-sidebar-card ul li a {
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 0.9rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }

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

        /* Download CTA */
        .download-cta {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.05), rgba(204, 255, 0, 0.05));
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

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

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

        .download-cta h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 16px;
        }

        .download-cta p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin-bottom: 32px;
        }

        .download-buttons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        /* Footer */
        .footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
            padding: 60px 0 24px;
        }

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

        .footer-brand h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text);
        }

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

        .footer-links h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text);
        }

        .footer-links ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links ul li a {
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .footer-links ul li a:hover {
            color: var(--primary);
        }

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

        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 90;
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            border-radius: 50%;
            background-image: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), linear-gradient(135deg, var(--accent), var(--primary));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            color: var(--primary);
            font-size: 1.5rem;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 0 24px rgba(0, 240, 255, 0.3);
            opacity: 0.7;
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.6);
        }

        .fab:active {
            transform: scale(0.95);
            border-color: var(--accent);
        }

        .fab .fab-notification {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 16px;
            height: 16px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid var(--bg);
            animation: blink 1.5s infinite;
        }

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

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

        @media (max-width: 768px) {
            .navbar-nav {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(15, 12, 32, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                transition: var(--transition);
                z-index: 99;
            }

            .navbar-nav.open {
                transform: translateY(0);
            }

            .navbar-nav a {
                width: 100%;
                padding: 14px 18px;
                font-size: 1rem;
            }

            .mobile-toggle {
                display: block;
            }

            .navbar-actions {
                gap: 6px;
            }

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

            .btn-signup {
                padding: 8px 14px;
                font-size: 0.85rem;
            }

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

            .hero h1 {
                font-size: 2.2rem;
            }

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

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

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

            section {
                padding: 60px 0;
            }

            .download-cta {
                padding: 32px 20px;
            }

            .progress-ring-wrap {
                flex-direction: column;
                align-items: flex-start;
            }
        }

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

            .navbar .container {
                height: 64px;
            }

            .navbar-brand {
                font-size: 1rem;
            }

            .navbar-brand .brand-icon {
                width: 30px;
                height: 30px;
                font-size: 1rem;
            }

            .hero h1 {
                font-size: 1.8rem;
            }

            .hero p {
                font-size: 1rem;
            }

            .hero-stats {
                gap: 20px;
            }

            .hero-stat .stat-value {
                font-size: 1.4rem;
            }

            .btn-primary, .btn-secondary {
                padding: 12px 20px;
                font-size: 0.9rem;
                width: 100%;
                justify-content: center;
            }

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

            .fab {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 12px;
                bottom: 80px;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #0F0C20;
            --bg-secondary: #0B1A30;
            --bg-card: rgba(15, 12, 32, 0.85);
            --accent-lime: #CCFF00;
            --accent-cyan: #00F0FF;
            --accent-pink: #FF007F;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --border-neon: rgba(0, 240, 255, 0.4);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --radius-card: 16px;
            --radius-btn: 9999px;
            --spacing-section: 5rem;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            color: var(--text-primary);
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        /* Header / Nav */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.2);
            transition: all 0.3s ease;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--accent-cyan);
            text-decoration: none;
            letter-spacing: -0.02em;
            white-space: nowrap;
        }
        .logo span {
            color: var(--accent-lime);
        }
        .navbar-nav {
            display: flex;
            align-items: center;
            gap: 1.8rem;
            list-style: none;
        }
        .navbar-nav a {
            color: var(--text-secondary);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.2s;
            position: relative;
            padding: 0.5rem 0;
        }
        .navbar-nav a:hover,
        .navbar-nav a.active {
            color: var(--accent-cyan);
        }
        .navbar-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-cyan);
            box-shadow: var(--shadow-neon);
        }
        .auth-buttons {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .btn-login {
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-weight: 600;
            cursor: pointer;
            font-size: 0.9rem;
            padding: 0.5rem 0.8rem;
        }
        .btn-signup {
            background: var(--accent-cyan);
            color: var(--bg-primary);
            border: none;
            padding: 0.6rem 1.4rem;
            border-radius: var(--radius-btn);
            font-weight: 700;
            cursor: pointer;
            font-size: 0.9rem;
            transition: all 0.3s;
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
        }
        .btn-signup:hover {
            background: var(--accent-lime);
            box-shadow: 0 0 20px rgba(204, 255, 0, 0.6);
            transform: translateY(-2px);
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.8rem;
            cursor: pointer;
        }
        /* Article Hero */
        .article-hero {
            padding-top: 130px;
            padding-bottom: 3rem;
            position: relative;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            opacity: 0.15;
            z-index: -1;
        }
        .article-breadcrumb {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-bottom: 1.2rem;
        }
        .article-breadcrumb a {
            color: var(--accent-cyan);
            text-decoration: none;
        }
        .article-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 1.2rem;
            background: linear-gradient(135deg, #FFFFFF 0%, #CCFF00 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        .article-meta i {
            color: var(--accent-cyan);
            margin-right: 0.4rem;
        }
        .article-cover {
            width: 100%;
            max-height: 450px;
            object-fit: cover;
            border-radius: var(--radius-card);
            margin-top: 2rem;
            border: 1px solid var(--border-neon);
            box-shadow: var(--shadow-neon);
        }
        /* Article Body */
        .article-body-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 3rem 0 5rem;
            align-items: start;
        }
        .article-content {
            background: var(--bg-card);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-card);
            padding: 2.5rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
        }
        .article-content h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin: 2rem 0 1rem;
            color: var(--accent-cyan);
        }
        .article-content h3 {
            font-size: 1.4rem;
            font-weight: 600;
            margin: 1.5rem 0 0.8rem;
            color: var(--accent-lime);
        }
        .article-content p {
            margin-bottom: 1.2rem;
            color: #D1D5DB;
            line-height: 1.7;
        }
        .article-content ul, .article-content ol {
            margin: 1rem 0 1.5rem 1.5rem;
            color: #D1D5DB;
        }
        .article-content li {
            margin-bottom: 0.5rem;
        }
        .article-content img {
            max-width: 100%;
            border-radius: 12px;
            margin: 1.5rem 0;
        }
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-card);
            padding: 1.5rem;
        }
        .sidebar-card h4 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--accent-cyan);
        }
        .sidebar-card ul {
            list-style: none;
        }
        .sidebar-card ul li {
            margin-bottom: 0.8rem;
        }
        .sidebar-card ul li a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color 0.2s;
        }
        .sidebar-card ul li a:hover {
            color: var(--accent-cyan);
        }
        .promo-box {
            background: linear-gradient(135deg, rgba(0,240,255,0.15), rgba(204,255,0,0.1));
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-card);
            padding: 1.5rem;
            text-align: center;
        }
        .promo-box h5 {
            font-size: 1.3rem;
            color: var(--accent-lime);
            margin-bottom: 0.5rem;
        }
        .promo-box p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }
        .btn-join {
            background: var(--accent-cyan);
            color: var(--bg-primary);
            border: none;
            padding: 0.7rem 1.8rem;
            border-radius: var(--radius-btn);
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
        }
        .btn-join:hover {
            background: var(--accent-lime);
            transform: translateY(-2px);
        }
        .not-found {
            text-align: center;
            padding: 4rem 2rem;
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid rgba(0,240,255,0.2);
        }
        .not-found i {
            font-size: 3rem;
            color: var(--accent-cyan);
            margin-bottom: 1rem;
        }
        .not-found h2 {
            font-size: 2rem;
            color: var(--accent-cyan);
            margin-bottom: 1rem;
        }
        .not-found p {
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
        }
        .btn-back {
            display: inline-block;
            background: var(--accent-cyan);
            color: var(--bg-primary);
            padding: 0.8rem 2rem;
            border-radius: var(--radius-btn);
            text-decoration: none;
            font-weight: 700;
            transition: all 0.3s;
        }
        .btn-back:hover {
            background: var(--accent-lime);
        }
        /* FAB */
        .fab-cyber {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 900;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0,0,0,0.7);
            backdrop-filter: blur(8px);
            border: 2px solid transparent;
            background-clip: padding-box;
            border-image: linear-gradient(135deg, #CCFF00, #00F0FF) 1;
            box-shadow: 0 0 15px rgba(0,240,255,0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s;
            animation: float 3s ease-in-out infinite;
            color: var(--accent-cyan);
            font-size: 1.4rem;
        }
        .fab-cyber:hover {
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(204,255,0,0.7);
            color: var(--accent-lime);
        }
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }
        /* Footer */
        .footer {
            background: rgba(15, 12, 32, 0.95);
            border-top: 1px solid rgba(0, 240, 255, 0.2);
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-brand h3 {
            font-size: 1.3rem;
            color: var(--accent-cyan);
            margin-bottom: 0.8rem;
        }
        .footer-brand p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .footer-links h4 {
            color: var(--accent-lime);
            font-size: 1rem;
            margin-bottom: 1rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links ul li {
            margin-bottom: 0.6rem;
        }
        .footer-links ul li a {
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.2s;
        }
        .footer-links ul li a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 1.5rem;
            text-align: center;
            color: var(--text-secondary);
            font-size: 0.85rem;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .article-body-wrapper {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                flex-direction: row;
                flex-wrap: wrap;
            }
            .sidebar-card, .promo-box {
                flex: 1 1 200px;
            }
            .article-hero h1 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            .navbar-nav {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(15, 12, 32, 0.98);
                flex-direction: column;
                padding: 1.5rem;
                gap: 1rem;
                border-bottom: 1px solid rgba(0, 240, 255, 0.2);
            }
            .navbar-nav.open {
                display: flex;
            }
            .menu-toggle {
                display: block;
            }
            .auth-buttons .btn-login {
                display: none;
            }
            .article-hero h1 {
                font-size: 1.8rem;
            }
            .article-content {
                padding: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .fab-cyber {
                left: 1rem;
                bottom: 4rem;
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
            }
        }
        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 1.5rem;
            }
            .article-meta {
                gap: 1rem;
                font-size: 0.8rem;
            }
            .container {
                padding: 0 1rem;
            }
            .article-body-wrapper {
                padding: 2rem 0 3rem;
            }
        }

/* roulang page: category1 */
:root {
            --bg-deep: #0f0c20;
            --bg-card: #141026;
            --bg-elevated: #1b1533;
            --accent-primary: #00f0ff;
            --accent-secondary: #ccff00;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --accent-pink: #ff007f;
            --text-primary: #ffffff;
            --text-secondary: #a6acaf;
            --text-muted: #6b7280;
            --border-glow: rgba(0, 240, 255, 0.25);
            --border-soft: rgba(255, 255, 255, 0.08);
            --radius-sm: 10px;
            --radius-md: 18px;
            --radius-lg: 28px;
            --radius-xl: 36px;
            --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 30px rgba(0, 240, 255, 0.15);
            --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --spacing-section: 5.5rem;
            --spacing-section-mobile: 3.5rem;
        }
        
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.65;
            overflow-x: hidden;
            min-height: 100vh;
            position: relative;
        }
        
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: 
                radial-gradient(circle at 15% 25%, rgba(0, 240, 255, 0.06) 0%, transparent 40%),
                radial-gradient(circle at 85% 65%, rgba(204, 255, 0, 0.04) 0%, transparent 35%),
                radial-gradient(circle at 50% 90%, rgba(255, 0, 127, 0.03) 0%, transparent 45%);
            pointer-events: none;
            z-index: 0;
        }
        
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-base);
        }
        
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent-primary);
            outline-offset: 3px;
            border-radius: 4px;
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        .container-fluid {
            max-width: 1320px;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            position: relative;
            z-index: 1;
        }
        
        /* ===== NAVBAR ===== */
        .navbar-custom {
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-soft);
            padding: 0.85rem 0;
            position: sticky;
            top: 0;
            z-index: 1030;
            transition: var(--transition-base);
        }
        
        .navbar-custom .navbar-brand {
            font-weight: 800;
            font-size: 1.35rem;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .navbar-custom .navbar-brand i {
            color: var(--accent-primary);
            font-size: 1.5rem;
            filter: drop-shadow(0 0 10px var(--accent-glow));
        }
        
        .navbar-custom .nav-link {
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.6rem 1.15rem;
            border-radius: 50px;
            transition: var(--transition-base);
            position: relative;
        }
        
        .navbar-custom .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }
        
        .navbar-custom .nav-link.active {
            color: var(--accent-primary);
            background: rgba(0, 240, 255, 0.1);
            box-shadow: inset 0 0 0 1px var(--border-glow);
        }
        
        .btn-login-nav {
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 0.55rem 1.4rem;
            border-radius: 50px;
            transition: var(--transition-base);
            background: transparent;
            border: none;
        }
        
        .btn-login-nav:hover {
            color: var(--accent-primary);
        }
        
        .btn-signup-nav {
            background: linear-gradient(135deg, var(--accent-primary), #0088cc);
            color: #000;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 0.55rem 1.6rem;
            border-radius: 50px;
            border: none;
            transition: var(--transition-base);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.35);
        }
        
        .btn-signup-nav:hover {
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.55);
            transform: translateY(-2px);
            color: #000;
        }
        
        .navbar-toggler {
            border: 1px solid var(--border-soft);
            color: var(--text-primary);
            padding: 0.5rem 0.7rem;
            border-radius: 8px;
        }
        
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.25);
            border-color: var(--accent-primary);
        }
        
        /* ===== HERO ===== */
        .hero-section {
            padding: 4.5rem 0 4rem;
            background: 
                radial-gradient(ellipse at 30% 20%, rgba(0, 240, 255, 0.1) 0%, transparent 55%),
                radial-gradient(ellipse at 75% 75%, rgba(204, 255, 0, 0.05) 0%, transparent 50%);
            position: relative;
            overflow: hidden;
        }
        
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -100px;
            right: -80px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }
        
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid var(--border-glow);
            color: var(--accent-primary);
            font-weight: 600;
            font-size: 0.85rem;
            padding: 0.5rem 1.3rem;
            border-radius: 50px;
            margin-bottom: 1.5rem;
            letter-spacing: 0.02em;
        }
        
        .hero-title {
            font-size: clamp(2.2rem, 5.5vw, 4.2rem);
            font-weight: 900;
            line-height: 1.1;
            letter-spacing: -0.03em;
            margin-bottom: 1.5rem;
            color: var(--text-primary);
        }
        
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.7;
            margin-bottom: 2rem;
        }
        
        .btn-primary-glow {
            background: linear-gradient(135deg, var(--accent-primary), #00b8d4);
            color: #000;
            font-weight: 700;
            font-size: 1rem;
            padding: 0.9rem 2.2rem;
            border-radius: 50px;
            border: none;
            transition: var(--transition-base);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.35);
        }
        
        .btn-primary-glow:hover {
            box-shadow: 0 0 50px rgba(0, 240, 255, 0.6);
            transform: translateY(-3px);
            color: #000;
        }
        
        .btn-outline-glow {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            padding: 0.9rem 2rem;
            border-radius: 50px;
            border: 1px solid var(--border-glow);
            transition: var(--transition-base);
        }
        
        .btn-outline-glow:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: var(--accent-primary);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.2);
            color: var(--text-primary);
            transform: translateY(-2px);
        }
        
        .hero-image-wrapper {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-glow);
            box-shadow: var(--shadow-glow);
            transition: var(--transition-smooth);
        }
        
        .hero-image-wrapper:hover {
            box-shadow: 0 0 50px rgba(0, 240, 255, 0.3);
            transform: scale(1.01);
        }
        
        .hero-image-wrapper img {
            width: 100%;
            height: 380px;
            object-fit: cover;
        }
        
        .hero-image-wrapper::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(15, 12, 32, 0.7) 100%);
            pointer-events: none;
        }
        
        .hero-stats {
            display: flex;
            gap: 2rem;
            margin-top: 2.5rem;
            flex-wrap: wrap;
        }
        
        .hero-stat {
            text-align: left;
        }
        
        .hero-stat .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-primary);
            letter-spacing: -0.02em;
            line-height: 1;
        }
        
        .hero-stat .stat-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-top: 0.3rem;
        }
        
        /* ===== SECTIONS ===== */
        .section {
            padding: var(--spacing-section) 0;
            position: relative;
        }
        
        .section-header {
            margin-bottom: 3rem;
        }
        
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-primary);
            margin-bottom: 0.8rem;
        }
        
        .section-title {
            font-size: clamp(1.8rem, 3.5vw, 2.8rem);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }
        
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.7;
        }
        
        /* ===== TIPS GRID ===== */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 1.8rem;
        }
        
        .tip-card {
            background: var(--bg-card);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 2rem;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        
        .tip-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
            opacity: 0;
            transition: var(--transition-smooth);
        }
        
        .tip-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        
        .tip-card:hover::before {
            opacity: 1;
        }
        
        .tip-icon {
            width: 54px;
            height: 54px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 1.2rem;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-primary);
            border: 1px solid var(--border-glow);
        }
        
        .tip-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }
        
        .tip-card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        
        .tip-card .tip-number {
            position: absolute;
            top: 1.5rem;
            right: 1.8rem;
            font-size: 3rem;
            font-weight: 900;
            color: rgba(255, 255, 255, 0.04);
            line-height: 1;
            pointer-events: none;
        }
        
        /* ===== STRATEGY BLOCK ===== */
        .strategy-block {
            background: var(--bg-card);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            transition: var(--transition-smooth);
        }
        
        .strategy-block:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }
        
        .strategy-content {
            padding: 3rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        
        .strategy-content h3 {
            font-size: 1.7rem;
            font-weight: 800;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }
        
        .strategy-content p {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.75;
            margin-bottom: 1.5rem;
        }
        
        .strategy-image {
            min-height: 380px;
            position: relative;
            overflow: hidden;
        }
        
        .strategy-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }
        
        .strategy-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .strategy-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.8rem;
            padding: 0.6rem 0;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        
        .strategy-list li i {
            color: var(--accent-secondary);
            margin-top: 0.25rem;
            flex-shrink: 0;
        }
        
        /* ===== FLOW SECTION ===== */
        .flow-list {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        
        .flow-item {
            display: flex;
            gap: 1.5rem;
            align-items: flex-start;
            padding: 1.5rem;
            background: var(--bg-card);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            transition: var(--transition-base);
        }
        
        .flow-item:hover {
            border-color: var(--border-glow);
            background: var(--bg-elevated);
        }
        
        .flow-step {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-primary), #00b8d4);
            color: #000;
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
        }
        
        .flow-content h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
            color: var(--text-primary);
        }
        
        .flow-content p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }
        
        /* ===== FAQ ===== */
        .faq-wrapper {
            max-width: 820px;
            margin: 0 auto;
        }
        
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            margin-bottom: 1rem;
            overflow: hidden;
            transition: var(--transition-base);
        }
        
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        
        .faq-item .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1.05rem;
            padding: 1.3rem 1.5rem;
            border: none;
            box-shadow: none;
        }
        
        .faq-item .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.05);
            color: var(--accent-primary);
        }
        
        .faq-item .accordion-button:focus {
            box-shadow: none;
            border-color: var(--border-glow);
        }
        
        .faq-item .accordion-button::after {
            filter: invert(0.8);
        }
        
        .faq-item .accordion-body {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.75;
            padding: 0 1.5rem 1.5rem;
        }
        
        /* ===== CTA SECTION ===== */
        .cta-section {
            padding: 4.5rem 0;
            background: 
                radial-gradient(ellipse at center, rgba(0, 240, 255, 0.1) 0%, transparent 60%),
                var(--bg-deep);
            border-top: 1px solid var(--border-soft);
            border-bottom: 1px solid var(--border-soft);
        }
        
        .cta-box {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(204, 255, 0, 0.04));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 3.5rem;
            text-align: left;
            position: relative;
            overflow: hidden;
        }
        
        .cta-box::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }
        
        .cta-box h2 {
            font-size: clamp(1.8rem, 3.5vw, 2.6rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 1rem;
        }
        
        .cta-box p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 560px;
            line-height: 1.7;
            margin-bottom: 2rem;
        }
        
        /* ===== FAB ===== */
        .fab-support {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 1050;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 2px solid var(--accent-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-primary);
            font-size: 1.4rem;
            cursor: pointer;
            transition: var(--transition-base);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
            opacity: 0.6;
        }
        
        .fab-support:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
            border-color: var(--accent-secondary);
            color: var(--accent-secondary);
        }
        
        .fab-support:active {
            transform: scale(0.95);
        }
        
        /* ===== FOOTER ===== */
        .footer {
            background: #0a0718;
            border-top: 1px solid var(--border-soft);
            padding: 3.5rem 0 1.5rem;
            position: relative;
            z-index: 1;
        }
        
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        
        .footer-brand h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1rem;
            line-height: 1.5;
        }
        
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        
        .footer-links h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        
        .footer-links ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .footer-links ul li {
            margin-bottom: 0.6rem;
        }
        
        .footer-links ul li a {
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: var(--transition-base);
        }
        
        .footer-links ul li a:hover {
            color: var(--accent-primary);
            padding-left: 0.3rem;
        }
        
        .footer-links ul li a i {
            margin-right: 0.5rem;
            width: 16px;
        }
        
        .footer-bottom {
            border-top: 1px solid var(--border-soft);
            padding-top: 1.5rem;
            text-align: center;
        }
        
        .footer-bottom p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        
        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            .strategy-block {
                grid-template-columns: 1fr;
            }
            
            .strategy-image {
                min-height: 280px;
                order: -1;
            }
            
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
        }
        
        @media (max-width: 768px) {
            :root {
                --spacing-section: 3.5rem;
                --spacing-section-mobile: 2.8rem;
            }
            
            .hero-section {
                padding: 3rem 0 2.5rem;
            }
            
            .hero-title {
                font-size: clamp(1.9rem, 7vw, 2.8rem);
            }
            
            .hero-image-wrapper img {
                height: 260px;
            }
            
            .hero-stats {
                gap: 1.5rem;
            }
            
            .section-header {
                margin-bottom: 2rem;
            }
            
            .tips-grid {
                grid-template-columns: 1fr;
            }
            
            .strategy-content {
                padding: 2rem;
            }
            
            .cta-box {
                padding: 2.5rem 2rem;
            }
            
            .flow-item {
                flex-direction: column;
                gap: 1rem;
            }
            
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
            
            .navbar-custom .nav-link {
                padding: 0.6rem 1rem;
                font-size: 0.9rem;
            }
            
            .btn-login-nav,
            .btn-signup-nav {
                font-size: 0.85rem;
                padding: 0.5rem 1.1rem;
            }
        }
        
        @media (max-width: 520px) {
            .container-fluid {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            
            .hero-title {
                font-size: 1.8rem;
            }
            
            .hero-subtitle {
                font-size: 1rem;
            }
            
            .hero-stats {
                flex-direction: column;
                gap: 1rem;
            }
            
            .hero-stat .stat-number {
                font-size: 1.6rem;
            }
            
            .strategy-content {
                padding: 1.5rem;
            }
            
            .strategy-content h3 {
                font-size: 1.4rem;
            }
            
            .cta-box {
                padding: 2rem 1.5rem;
            }
            
            .tip-card {
                padding: 1.5rem;
            }
            
            .tip-card .tip-number {
                font-size: 2.2rem;
                top: 1.2rem;
                right: 1.3rem;
            }
            
            .fab-support {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 0.8rem;
                bottom: 5rem;
            }
        }

/* roulang page: category3 */
:root {
            --primary-bg: #0F0C20;
            --secondary-bg: #0B1A30;
            --accent-lime: #CCFF00;
            --accent-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --border-neon: rgba(0, 240, 255, 0.3);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-lime: 0 0 15px rgba(204, 255, 0, 0.4);
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 6px;
            --spacing-section: 4rem;
            --font-primary: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

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

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

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.3s ease;
        }

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

        button, input, textarea {
            font-family: inherit;
            outline: none;
        }

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

        /* Header & Navigation */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            transition: all 0.3s ease;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.9rem 0;
            flex-wrap: wrap;
            gap: 0.8rem;
        }

        .logo {
            font-size: 1.15rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.3;
            max-width: 280px;
        }

        .navbar-nav {
            display: flex;
            align-items: center;
            gap: 1.25rem;
            list-style: none;
            flex-wrap: wrap;
        }

        .navbar-nav a {
            color: var(--text-silver);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 0.4rem 0.6rem;
            border-radius: var(--radius-sm);
            position: relative;
            transition: all 0.25s ease;
        }

        .navbar-nav a:hover,
        .navbar-nav a.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
        }

        .navbar-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: var(--shadow-neon);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }

        .btn-login {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-white);
            padding: 0.45rem 1.1rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.85rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }

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

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            color: #0F0C20;
            padding: 0.5rem 1.3rem;
            border-radius: var(--radius-md);
            font-weight: 800;
            font-size: 0.85rem;
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow-lime);
            transition: all 0.3s ease;
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(204, 255, 0, 0.5);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-white);
            font-size: 1.4rem;
            cursor: pointer;
            padding: 0.3rem 0.7rem;
            border-radius: var(--radius-sm);
        }

        /* Hero Section */
        .hero {
            padding: 8rem 0 4rem;
            position: relative;
            background: radial-gradient(circle at 20% 30%, rgba(0, 240, 255, 0.08), transparent 60%),
                        radial-gradient(circle at 80% 70%, rgba(204, 255, 0, 0.06), transparent 60%);
        }

        .hero-content {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 3rem;
            align-items: center;
        }

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

        .hero-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--accent-cyan);
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            margin-bottom: 1.2rem;
        }

        .hero-text h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
            font-weight: 900;
            line-height: 1.15;
            margin-bottom: 1.2rem;
            background: linear-gradient(135deg, #FFFFFF, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-text p {
            color: var(--text-silver);
            font-size: 1.05rem;
            max-width: 600px;
            margin-bottom: 1.8rem;
        }

        .hero-points {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            margin-bottom: 2rem;
            text-align: left;
        }

        .hero-points li {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            color: var(--text-silver);
            font-weight: 500;
        }

        .hero-points i {
            color: var(--accent-lime);
            font-size: 1.1rem;
        }

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

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            color: #0F0C20;
            padding: 0.9rem 2rem;
            border-radius: var(--radius-md);
            font-weight: 800;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow-lime);
            transition: all 0.3s ease;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(204, 255, 0, 0.55);
        }

        .btn-outline {
            background: transparent;
            border: 1px solid var(--border-neon);
            color: var(--accent-cyan);
            padding: 0.9rem 2rem;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }

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

        .hero-trust {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            margin-top: 1.5rem;
            flex-wrap: wrap;
        }

        .trust-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--text-silver);
            font-size: 0.85rem;
            font-weight: 600;
        }

        .trust-item i {
            color: var(--accent-lime);
        }

        .hero-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, 0.2);
            box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
        }

        .hero-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 350px;
        }

        .hero-visual::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 12, 32, 0.5), transparent 50%);
            pointer-events: none;
        }

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

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

        .section-header h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.3rem);
            font-weight: 800;
            margin-bottom: 0.8rem;
            color: var(--text-white);
        }

        .section-header p {
            color: var(--text-silver);
            font-size: 1rem;
            max-width: 650px;
        }

        /* Feature Grid */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.8rem;
        }

        .feature-card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-lg);
            padding: 1.8rem;
            transition: all 0.35s ease;
            cursor: pointer;
        }

        .feature-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-neon);
            transform: translateY(-4px);
            background: rgba(0, 240, 255, 0.05);
        }

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

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
        }

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

        /* Steps / Timeline */
        .steps-flow {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }

        .step-item {
            display: flex;
            gap: 1.5rem;
            align-items: flex-start;
            padding: 1.5rem;
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.02);
            border-left: 3px solid var(--accent-cyan);
            transition: all 0.3s ease;
        }

        .step-item:hover {
            background: rgba(0, 240, 255, 0.05);
            border-left-color: var(--accent-lime);
        }

        .step-number {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            color: #0F0C20;
            font-weight: 900;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
        }

        .step-content h3 {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 0.4rem;
        }

        .step-content p {
            color: var(--text-silver);
            font-size: 0.95rem;
        }

        /* Tips Section */
        .tips-bento {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .tip-card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(204, 255, 0, 0.2);
            border-radius: var(--radius-lg);
            padding: 1.6rem;
            transition: all 0.35s ease;
        }

        .tip-card:hover {
            border-color: var(--accent-lime);
            box-shadow: var(--shadow-lime);
            transform: translateY(-3px);
        }

        .tip-tag {
            display: inline-block;
            background: rgba(204, 255, 0, 0.12);
            color: var(--accent-lime);
            padding: 0.25rem 0.8rem;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
        }

        .tip-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .tip-card p {
            color: var(--text-silver);
            font-size: 0.9rem;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .faq-item {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.2rem 1.5rem;
            cursor: pointer;
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-white);
            transition: all 0.3s ease;
        }

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

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

        .faq-answer {
            padding: 0 1.5rem 1.2rem;
            color: var(--text-silver);
            font-size: 0.92rem;
            display: none;
            line-height: 1.7;
        }

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

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

        /* CTA Section */
        .cta-section {
            padding: 4rem 0;
            text-align: center;
            background: radial-gradient(circle at 50% 50%, rgba(0, 240, 255, 0.12), transparent 70%);
        }

        .cta-section h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 1rem;
        }

        .cta-section p {
            color: var(--text-silver);
            max-width: 600px;
            margin: 0 auto 2rem;
            font-size: 1rem;
        }

        /* Footer */
        .footer {
            background: rgba(0, 0, 0, 0.3);
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            padding: 3rem 0 1.5rem;
            margin-top: 2rem;
        }

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

        .footer-brand h3 {
            font-size: 1.1rem;
            font-weight: 800;
            margin-bottom: 0.8rem;
            color: var(--accent-cyan);
        }

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

        .footer-links h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            color: var(--text-white);
        }

        .footer-links ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .footer-links a {
            color: var(--text-silver);
            font-size: 0.88rem;
            transition: all 0.3s ease;
        }

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

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

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

        /* FAB */
        .fab {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 999;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            cursor: pointer;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
            transition: all 0.3s ease;
            animation: fabFloat 3s ease-in-out infinite;
        }

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

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

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-content {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .hero-visual img {
                min-height: 250px;
            }
            .tips-bento {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .mobile-toggle {
                display: block;
            }
            .navbar-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 0.4rem;
                padding: 1rem 0;
            }
            .navbar-nav.open {
                display: flex;
            }
            .nav-actions {
                margin-left: auto;
            }
            .tips-bento {
                grid-template-columns: 1fr;
            }
            .step-item {
                flex-direction: column;
                gap: 0.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
            .hero {
                padding: 7rem 0 3rem;
            }
        }

        @media (max-width: 520px) {
            .logo {
                font-size: 0.95rem;
                max-width: 200px;
            }
            .btn-login, .btn-signup {
                padding: 0.4rem 0.8rem;
                font-size: 0.75rem;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline {
                width: 100%;
                text-align: center;
            }
            .container {
                padding: 0 1rem;
            }
            .section {
                padding: 2.5rem 0;
            }
        }

/* roulang page: category2 */
:root {
            --color-bg-primary: #0F0C20;
            --color-bg-secondary: #0B1A30;
            --color-accent-lime: #CCFF00;
            --color-accent-cyan: #00F0FF;
            --color-text-white: #FFFFFF;
            --color-text-silver: #A6ACAF;
            --color-border-dark: rgba(0, 240, 255, 0.2);
            --color-border-light: rgba(0, 240, 255, 0.4);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.3);
            --shadow-neon-strong: 0 0 30px rgba(0, 240, 255, 0.5);
            --shadow-neon-lime: 0 0 20px rgba(204, 255, 0, 0.3);
            --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --spacing-section: 4rem;
            --transition-base: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(15, 12, 32, 0.9);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border-dark);
            transition: var(--transition-base);
        }

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

        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 0;
            gap: 1rem;
            flex-wrap: nowrap;
        }

        .navbar-brand {
            flex-shrink: 0;
            max-width: 320px;
        }

        .navbar-brand a {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--color-text-white);
            text-decoration: none;
            line-height: 1.3;
            display: block;
            letter-spacing: 0.01em;
            transition: color 0.3s ease;
        }

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

        .navbar-nav {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-shrink: 1;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }

        .navbar-nav::-webkit-scrollbar {
            display: none;
        }

        .navbar-nav li {
            white-space: nowrap;
        }

        .navbar-nav a {
            display: block;
            padding: 0.5rem 0.9rem;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--color-text-silver);
            text-decoration: none;
            border-radius: 20px;
            transition: var(--transition-base);
            border: 1px solid transparent;
            letter-spacing: 0.02em;
        }

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

        .navbar-nav a.active {
            color: var(--color-accent-lime);
            background: rgba(204, 255, 0, 0.1);
            border-color: rgba(204, 255, 0, 0.3);
            font-weight: 600;
        }

        .navbar-actions {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-shrink: 0;
        }

        .btn-login {
            padding: 0.5rem 1rem;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--color-text-white);
            background: transparent;
            border: none;
            cursor: pointer;
            border-radius: 20px;
            transition: var(--transition-base);
            white-space: nowrap;
        }

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

        .btn-signup {
            padding: 0.5rem 1.2rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: #0F0C20;
            background: var(--color-accent-lime);
            border: none;
            cursor: pointer;
            border-radius: 20px;
            transition: var(--transition-base);
            white-space: nowrap;
            box-shadow: 0 0 15px rgba(204, 255, 0, 0.3);
        }

        .btn-signup:hover {
            background: #d9ff33;
            box-shadow: 0 0 25px rgba(204, 255, 0, 0.5);
            transform: translateY(-1px);
        }

        /* Page Banner */
        .page-banner {
            position: relative;
            padding: 3rem 0 2rem;
            background: linear-gradient(180deg, rgba(0, 240, 255, 0.05) 0%, transparent 100%);
            border-bottom: 1px solid var(--color-border-dark);
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            pointer-events: none;
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.8rem;
            color: var(--color-text-silver);
            margin-bottom: 1rem;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--color-accent-cyan);
            text-decoration: none;
            transition: color 0.3s ease;
        }

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

        .breadcrumb .separator {
            color: var(--color-text-silver);
            opacity: 0.5;
        }

        .breadcrumb .current {
            color: var(--color-text-white);
            font-weight: 500;
        }

        .page-banner h1 {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--color-text-white);
            margin-bottom: 0.8rem;
            letter-spacing: -0.01em;
        }

        .page-banner .subtitle {
            font-size: 1.05rem;
            color: var(--color-text-silver);
            max-width: 680px;
            line-height: 1.6;
        }

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

        .section {
            margin-bottom: 3.5rem;
        }

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

        .section-heading {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--color-text-white);
            margin-bottom: 1.5rem;
            letter-spacing: -0.01em;
            line-height: 1.3;
            border-left: 4px solid var(--color-accent-cyan);
            padding-left: 1rem;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--color-text-silver);
            line-height: 1.7;
            margin-bottom: 2rem;
            max-width: 800px;
        }

        /* Game Cards Grid */
        .game-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
        }

        .game-card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-base);
            cursor: pointer;
            position: relative;
        }

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

        .game-card .card-image {
            width: 100%;
            height: 180px;
            overflow: hidden;
            position: relative;
        }

        .game-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .game-card:hover .card-image img {
            transform: scale(1.05);
        }

        .game-card .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 0.3rem 0.8rem;
            font-size: 0.75rem;
            font-weight: 700;
            border-radius: 12px;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            z-index: 2;
        }

        .badge-hot {
            background: #FF007F;
            color: #FFFFFF;
            box-shadow: 0 0 10px rgba(255, 0, 127, 0.5);
        }

        .badge-new {
            background: var(--color-accent-lime);
            color: #0F0C20;
            box-shadow: 0 0 10px rgba(204, 255, 0, 0.4);
        }

        .badge-top {
            background: var(--color-accent-cyan);
            color: #0F0C20;
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
        }

        .game-card .card-body {
            padding: 1.2rem 1.2rem 1.4rem;
        }

        .game-card .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-text-white);
            margin-bottom: 0.5rem;
            line-height: 1.3;
        }

        .game-card .card-rating {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            margin-bottom: 0.7rem;
            font-size: 0.85rem;
            color: var(--color-accent-lime);
        }

        .game-card .card-rating i {
            font-size: 0.8rem;
        }

        .game-card .card-desc {
            font-size: 0.88rem;
            color: var(--color-text-silver);
            line-height: 1.6;
            margin-bottom: 1rem;
        }

        .game-card .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
        }

        .game-card .card-tags span {
            font-size: 0.72rem;
            padding: 0.2rem 0.6rem;
            border-radius: 10px;
            background: rgba(0, 240, 255, 0.08);
            color: var(--color-accent-cyan);
            border: 1px solid rgba(0, 240, 255, 0.2);
            transition: var(--transition-base);
        }

        .game-card:hover .card-tags span {
            background: rgba(0, 240, 255, 0.15);
        }

        /* Feature Highlight */
        .feature-highlight {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2.5rem;
            align-items: center;
            padding: 2.5rem;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-lg);
            position: relative;
            overflow: hidden;
        }

        .feature-highlight::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -30%;
            width: 60%;
            height: 200%;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .feature-highlight .feature-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border-dark);
        }

        .feature-highlight .feature-image img {
            width: 100%;
            height: 280px;
            object-fit: cover;
            display: block;
        }

        .feature-highlight .feature-content h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--color-text-white);
            margin-bottom: 0.8rem;
            line-height: 1.3;
        }

        .feature-highlight .feature-content p {
            font-size: 0.95rem;
            color: var(--color-text-silver);
            line-height: 1.7;
            margin-bottom: 1rem;
        }

        .feature-highlight .feature-content .feature-list {
            list-style: none;
            padding: 0;
            margin: 0 0 1.2rem;
        }

        .feature-highlight .feature-content .feature-list li {
            font-size: 0.9rem;
            color: var(--color-text-silver);
            padding-left: 1.5rem;
            position: relative;
            margin-bottom: 0.5rem;
            line-height: 1.5;
        }

        .feature-highlight .feature-content .feature-list li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            color: var(--color-accent-lime);
            font-size: 0.8rem;
        }

        /* Comparison Table */
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border-dark);
        }

        .comparison-table thead {
            background: rgba(0, 240, 255, 0.08);
        }

        .comparison-table th {
            padding: 1rem 1.2rem;
            text-align: left;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--color-accent-cyan);
            letter-spacing: 0.03em;
            text-transform: uppercase;
            border-bottom: 1px solid var(--color-border-dark);
        }

        .comparison-table td {
            padding: 1rem 1.2rem;
            font-size: 0.88rem;
            color: var(--color-text-silver);
            border-bottom: 1px solid rgba(0, 240, 255, 0.08);
            line-height: 1.5;
        }

        .comparison-table tbody tr {
            transition: var(--transition-base);
        }

        .comparison-table tbody tr:hover {
            background: rgba(0, 240, 255, 0.04);
        }

        .comparison-table tbody tr:last-child td {
            border-bottom: none;
        }

        .comparison-table .game-name {
            font-weight: 600;
            color: var(--color-text-white);
        }

        .comparison-table .rating-stars {
            color: var(--color-accent-lime);
            font-size: 0.85rem;
        }

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

        .faq-item {
            margin-bottom: 0.8rem;
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition-base);
            background: rgba(255, 255, 255, 0.02);
        }

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

        .faq-question {
            padding: 1.2rem 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text-white);
            transition: var(--transition-base);
            gap: 1rem;
        }

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

        .faq-question .faq-icon {
            flex-shrink: 0;
            transition: transform 0.3s ease;
            color: var(--color-accent-cyan);
            font-size: 0.9rem;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            padding: 0 1.5rem;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-answer p {
            padding-bottom: 1.2rem;
            font-size: 0.88rem;
            color: var(--color-text-silver);
            line-height: 1.7;
        }

        /* CTA Section */
        .cta-section {
            padding: 3rem 2.5rem;
            background: linear-gradient(135deg, rgba(204, 255, 0, 0.08) 0%, rgba(0, 240, 255, 0.08) 100%);
            border: 1px solid var(--color-border-dark);
            border-radius: var(--radius-lg);
            text-align: left;
            position: relative;
            overflow: hidden;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40%;
            right: -20%;
            width: 50%;
            height: 200%;
            background: radial-gradient(circle, rgba(204, 255, 0, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-text-white);
            margin-bottom: 0.8rem;
            line-height: 1.3;
        }

        .cta-section p {
            font-size: 0.95rem;
            color: var(--color-text-silver);
            line-height: 1.7;
            margin-bottom: 1.5rem;
            max-width: 600px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 2rem;
            font-size: 0.95rem;
            font-weight: 700;
            color: #0F0C20;
            background: var(--color-accent-lime);
            border: none;
            border-radius: 24px;
            cursor: pointer;
            transition: var(--transition-base);
            text-decoration: none;
            box-shadow: 0 0 20px rgba(204, 255, 0, 0.3);
        }

        .btn-primary:hover {
            background: #d9ff33;
            box-shadow: 0 0 35px rgba(204, 255, 0, 0.5);
            transform: translateY(-2px);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 2rem;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-accent-cyan);
            background: transparent;
            border: 1px solid var(--color-accent-cyan);
            border-radius: 24px;
            cursor: pointer;
            transition: var(--transition-base);
            text-decoration: none;
        }

        .btn-secondary:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: var(--shadow-neon);
            transform: translateY(-2px);
        }

        /* Footer */
        .footer {
            background: rgba(11, 26, 48, 0.8);
            border-top: 1px solid var(--color-border-dark);
            padding: 3rem 0 1.5rem;
            margin-top: 2rem;
        }

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

        .footer-brand h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-text-white);
            margin-bottom: 0.8rem;
            line-height: 1.4;
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: var(--color-text-silver);
            line-height: 1.6;
        }

        .footer-links h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--color-text-white);
            margin-bottom: 0.8rem;
            letter-spacing: 0.02em;
        }

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

        .footer-links ul li {
            margin-bottom: 0.5rem;
        }

        .footer-links ul li a {
            font-size: 0.85rem;
            color: var(--color-text-silver);
            text-decoration: none;
            transition: color 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }

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

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

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

        /* FAB */
        .fab-support {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 60;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(15, 12, 32, 0.85), rgba(15, 12, 32, 0.85)), linear-gradient(135deg, #CCFF00, #00F0FF);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0.7;
            transition: var(--transition-base);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
            animation: fab-breath 3s ease-in-out infinite;
        }

        @keyframes fab-breath {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-4px); }
        }

        .fab-support:hover {
            opacity: 1;
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.6);
            transform: scale(1.05);
        }

        .fab-support i {
            font-size: 1.4rem;
            color: var(--color-accent-cyan);
            transition: transform 0.4s ease;
        }

        .fab-support:hover i {
            transform: rotate(360deg);
            color: var(--color-accent-lime);
        }

        .fab-support .notification-dot {
            position: absolute;
            top: 2px;
            right: 2px;
            width: 12px;
            height: 12px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid #0F0C20;
            animation: dot-blink 1.5s ease-in-out infinite;
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            
            .feature-highlight {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 3rem;
            }

            .navbar {
                flex-wrap: wrap;
            }

            .navbar-brand {
                max-width: 200px;
            }

            .navbar-brand a {
                font-size: 0.8rem;
            }

            .navbar-nav {
                order: 3;
                width: 100%;
                overflow-x: auto;
                padding-bottom: 0.5rem;
            }

            .navbar-nav a {
                font-size: 0.78rem;
                padding: 0.4rem 0.7rem;
            }

            .navbar-actions {
                gap: 0.3rem;
            }

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

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

            .page-banner .subtitle {
                font-size: 0.9rem;
            }

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

            .game-card .card-image {
                height: 160px;
            }

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

            .feature-highlight {
                padding: 1.5rem;
            }

            .feature-highlight .feature-image img {
                height: 200px;
            }

            .comparison-table {
                font-size: 0.75rem;
            }

            .comparison-table th, .comparison-table td {
                padding: 0.7rem 0.8rem;
                font-size: 0.75rem;
            }

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

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .fab-support {
                left: 0.8rem;
                bottom: 5rem;
                width: 48px;
                height: 48px;
            }

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

        @media (max-width: 520px) {
            .container {
                padding: 0 1rem;
            }

            .navbar-brand a {
                font-size: 0.72rem;
            }

            .btn-login {
                display: none;
            }

            .btn-signup {
                font-size: 0.7rem;
                padding: 0.35rem 0.7rem;
            }

            .page-banner {
                padding: 2rem 0 1.5rem;
            }

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

            .game-card .card-image {
                height: 140px;
            }

            .game-card .card-body {
                padding: 1rem;
            }

            .game-card .card-title {
                font-size: 1rem;
            }

            .btn-primary, .btn-secondary {
                padding: 0.7rem 1.5rem;
                font-size: 0.85rem;
            }
        }