/* roulang page: index */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.85);
            --accent-electric: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-subtle: rgba(0, 240, 255, 0.15);
            --border-glow: rgba(0, 240, 255, 0.4);
            --gradient-hero: linear-gradient(135deg, #08090F 0%, #0D111E 50%, #0052FF 100%);
            --gradient-btn: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --gradient-card-border: linear-gradient(135deg, #0052FF, #00F0FF);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --shadow-card: 0 8px 32px rgba(0, 82, 255, 0.15);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-heading: 'Segoe UI', sans-serif;
            --font-body: 'Segoe UI', sans-serif;
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .container-wide {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 24px;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-smooth);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            border: none;
            outline: none;
        }

        .text-accent {
            color: var(--accent-cyan);
        }
        .text-muted {
            color: var(--text-muted);
        }
        .fw-semi {
            font-weight: 600;
        }

        /* Header / Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition-smooth);
        }
        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.96);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }
        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
        }
        .navbar-brand {
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            background: var(--gradient-btn);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 6px 0;
            transition: var(--transition-smooth);
            white-space: nowrap;
        }
        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--accent-cyan);
        }
        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 1px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-login {
            background: transparent;
            color: var(--text-secondary);
            border: 1px solid var(--border-subtle);
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition-smooth);
        }
        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }
        .btn-signup {
            background: var(--gradient-btn);
            color: #fff;
            padding: 9px 24px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
            transition: var(--transition-smooth);
        }
        .btn-signup:hover {
            box-shadow: 0 6px 25px rgba(0, 240, 255, 0.5);
            transform: translateY(-1px);
            color: #fff;
        }
        .mobile-toggle {
            display: none;
            background: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            border: none;
            padding: 4px;
        }
        @media (max-width: 992px) {
            .nav-menu {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: flex-start;
                padding: 20px 24px;
                gap: 16px;
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition-smooth);
                border-bottom: 1px solid var(--border-subtle);
                z-index: 1049;
            }
            .nav-menu.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-actions {
                gap: 8px;
            }
            .mobile-toggle {
                display: block;
            }
            .btn-login,
            .btn-signup {
                padding: 7px 16px;
                font-size: 0.85rem;
            }
            .navbar-brand {
                font-size: 1.15rem;
            }
        }
        @media (max-width: 520px) {
            .btn-login,
            .btn-signup {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
            .navbar {
                padding: 10px 0;
            }
        }

        /* Hero Section */
        .hero-section {
            position: relative;
            padding: 160px 0 100px;
            background: var(--gradient-hero);
            overflow: hidden;
            min-height: 85vh;
            display: flex;
            align-items: center;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 800px;
            height: 800px;
            background: radial-gradient(circle, rgba(0,240,255,0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
        }
        .hero-title {
            font-family: var(--font-heading);
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            background: linear-gradient(to right, #FFFFFF, #CBD5E1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 600px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary-cta {
            background: var(--gradient-btn);
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: var(--shadow-glow);
            transition: var(--transition-smooth);
            border: none;
        }
        .btn-primary-cta:hover {
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-secondary-cta {
            background: transparent;
            color: var(--text-primary);
            border: 2px solid var(--border-glow);
            padding: 14px 36px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition-smooth);
        }
        .btn-secondary-cta:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.05);
        }
        .hero-badge-list {
            display: flex;
            gap: 20px;
            margin-top: 36px;
            flex-wrap: wrap;
        }
        .hero-badge-item {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        .hero-badge-item i {
            color: var(--accent-cyan);
            font-size: 1.1rem;
        }
        @media (max-width: 992px) {
            .hero-section {
                padding: 130px 0 70px;
                min-height: auto;
            }
            .hero-title {
                font-size: 2.4rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.9rem;
            }
            .btn-primary-cta,
            .btn-secondary-cta {
                padding: 12px 24px;
                font-size: 0.95rem;
            }
            .hero-badge-list {
                gap: 12px;
            }
        }

        /* Section Shared */
        .section-block {
            padding: 80px 0;
        }
        .section-header {
            margin-bottom: 50px;
        }
        .section-label {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 10px;
        }
        .section-title {
            font-family: var(--font-heading);
            font-size: 2.4rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section-block {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }

        /* Latest Updates */
        .updates-list {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            align-items: start;
        }
        .updates-main {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .update-item {
            display: flex;
            align-items: baseline;
            gap: 16px;
            padding: 16px 20px;
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            transition: var(--transition-smooth);
        }
        .update-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-card);
        }
        .update-date {
            font-size: 0.8rem;
            color: var(--accent-cyan);
            font-weight: 600;
            white-space: nowrap;
        }
        .update-title {
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            flex: 1;
        }
        .update-item:hover .update-title {
            color: var(--accent-cyan);
        }
        .updates-sidebar {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 24px;
            position: sticky;
            top: 100px;
        }
        .sidebar-heading {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 16px;
            color: var(--accent-cyan);
        }
        .sidebar-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .sidebar-list li {
            font-size: 0.92rem;
            color: var(--text-secondary);
            padding: 6px 0;
            border-bottom: 1px solid var(--border-subtle);
        }
        .sidebar-list li:last-child {
            border-bottom: none;
        }
        @media (max-width: 768px) {
            .updates-list {
                grid-template-columns: 1fr;
            }
            .updates-sidebar {
                position: static;
            }
        }

        /* Quick Answers */
        .qa-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .qa-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            transition: var(--transition-smooth);
        }
        .qa-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-card);
        }
        .qa-icon {
            font-size: 2rem;
            color: var(--accent-cyan);
            margin-bottom: 14px;
        }
        .qa-question {
            font-weight: 700;
            font-size: 1.15rem;
            margin-bottom: 10px;
        }
        .qa-answer {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }
        @media (max-width: 768px) {
            .qa-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Info / Article Loop */
        .info-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .info-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition-smooth);
        }
        .info-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-card);
            transform: translateY(-4px);
        }
        .info-card-body {
            padding: 20px 20px;
        }
        .info-card-title {
            font-weight: 700;
            font-size: 1.05rem;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .info-card-excerpt {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .info-card-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            justify-content: space-between;
        }
        @media (max-width: 992px) {
            .info-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .info-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Security System */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .security-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px 20px;
            text-align: center;
            transition: var(--transition-smooth);
        }
        .security-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-card);
        }
        .security-icon {
            font-size: 2.4rem;
            color: var(--accent-cyan);
            margin-bottom: 14px;
        }
        .security-title {
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 6px;
        }
        .security-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
        }
        @media (max-width: 768px) {
            .security-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .security-grid {
                grid-template-columns: 1fr;
            }
        }

        /* App Download */
        .app-section {
            background: var(--bg-secondary);
            border-radius: var(--radius-xl);
            overflow: hidden;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            padding: 60px 50px;
            border: 1px solid var(--border-subtle);
        }
        .app-content {
            padding: 20px 0;
        }
        .app-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .app-desc {
            color: var(--text-secondary);
            margin-bottom: 28px;
            font-size: 1rem;
            line-height: 1.7;
        }
        .app-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-app {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.06);
            border: 1px solid var(--border-subtle);
            padding: 12px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            color: var(--text-primary);
            transition: var(--transition-smooth);
        }
        .btn-app:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0,240,255,0.05);
        }
        .app-visual img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-glow);
            width: 100%;
        }
        @media (max-width: 768px) {
            .app-section {
                grid-template-columns: 1fr;
                padding: 30px 24px;
                gap: 20px;
            }
            .app-title {
                font-size: 1.6rem;
            }
        }

        /* Testimonials Bubble Wall */
        .bubble-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .bubble-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 24px 20px;
            transition: var(--transition-smooth);
            position: relative;
        }
        .bubble-card::before {
            content: '“';
            font-size: 3rem;
            color: var(--accent-cyan);
            position: absolute;
            top: 4px;
            left: 16px;
            opacity: 0.3;
        }
        .bubble-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-card);
        }
        .bubble-text {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
            padding-left: 20px;
        }
        .bubble-user {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .bubble-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--gradient-btn);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.85rem;
        }
        .bubble-name {
            font-weight: 600;
            font-size: 0.9rem;
        }
        .bubble-role {
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        @media (max-width: 992px) {
            .bubble-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .bubble-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 40px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 28px;
            border-bottom: 1px solid var(--border-subtle);
            margin-bottom: 20px;
        }
        .footer-brand {
            font-weight: 700;
            font-size: 1.2rem;
            background: var(--gradient-btn);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 10px;
        }
        .footer-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .footer-links h5 {
            font-weight: 700;
            margin-bottom: 14px;
            font-size: 0.95rem;
            color: var(--text-primary);
        }
        .footer-links ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 8px;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition-smooth);
        }
        .footer-links a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        /* FAB */
        .fab-floating {
            position: fixed;
            left: 20px;
            bottom: 90px;
            z-index: 1070;
            width: 52px;
            height: 52px;
            border-radius: 28px;
            background: rgba(8,9,15,0.7);
            backdrop-filter: blur(14px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            box-shadow: 0 0 18px rgba(0,240,255,0.5);
            transition: var(--transition-smooth);
            cursor: pointer;
            animation: fabPulse 2.5s infinite;
        }
        .fab-floating::before {
            content: '';
            position: absolute;
            inset: -4px;
            border-radius: 32px;
            background: var(--gradient-card-border);
            z-index: -1;
            opacity: 0.6;
            filter: blur(4px);
        }
        .fab-floating:hover {
            box-shadow: 0 0 30px rgba(0,240,255,0.7);
            transform: scale(1.08);
        }
        @keyframes fabPulse {
            0%, 100% { opacity: 0.7; }
            50% { opacity: 1; }
        }
        @media (max-width: 520px) {
            .fab-floating {
                left: 16px;
                bottom: 70px;
                width: 46px;
                height: 46px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.85);
            --accent-electric: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-subtle: rgba(0, 240, 255, 0.15);
            --border-glow: rgba(0, 240, 255, 0.4);
            --gradient-hero: linear-gradient(135deg, #08090F 0%, #0D111E 50%, #0052FF 100%);
            --gradient-btn: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --gradient-card-border: linear-gradient(135deg, #0052FF, #00F0FF);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --shadow-card: 0 8px 32px rgba(0, 82, 255, 0.15);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-heading: 'Segoe UI', sans-serif;
            --font-body: 'Segoe UI', sans-serif;
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: 70px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .container-wide {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 24px;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-smooth);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            border: none;
            outline: none;
        }
        .text-accent {
            color: var(--accent-cyan);
        }
        .text-muted {
            color: var(--text-muted);
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition-smooth);
        }
        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.96);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }
        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
        }
        .navbar-brand {
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            background: var(--gradient-btn);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 6px 0;
            transition: var(--transition-smooth);
            white-space: nowrap;
        }
        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--accent-cyan);
        }
        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 1px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-login {
            background: transparent;
            color: var(--text-secondary);
            border: 1px solid var(--border-subtle);
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition-smooth);
        }
        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }
        .btn-signup {
            background: var(--gradient-btn);
            color: #fff;
            padding: 9px 24px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
            transition: var(--transition-smooth);
        }
        .btn-signup:hover {
            box-shadow: 0 6px 25px rgba(0, 240, 255, 0.5);
            transform: translateY(-1px);
            color: #fff;
        }
        .mobile-toggle {
            display: none;
            background: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            border: none;
            padding: 4px;
        }
        .btn-cta-glow {
            background: var(--gradient-btn);
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: var(--shadow-glow);
            transition: var(--transition-smooth);
            display: inline-block;
            border: none;
            cursor: pointer;
            text-align: center;
        }
        .btn-cta-glow:hover {
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
            color: #fff;
        }
        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(15px);
            -webkit-backdrop-filter: blur(15px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: var(--transition-smooth);
        }
        .glass-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        .page-banner {
            position: relative;
            background: var(--gradient-hero);
            padding: 80px 0 60px;
            text-align: left;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .page-banner-content {
            position: relative;
            z-index: 1;
        }
        .page-banner h1 {
            font-family: var(--font-heading);
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 18px;
            line-height: 1.25;
        }
        .page-banner p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 700px;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .section {
            padding: 70px 0;
        }
        .section-title {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
            text-align: left;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            margin-bottom: 40px;
            text-align: left;
            max-width: 750px;
        }
        .step-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .step-item {
            display: flex;
            gap: 24px;
            margin-bottom: 32px;
            padding: 28px;
            background: var(--bg-card);
            backdrop-filter: blur(15px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            transition: var(--transition-smooth);
            align-items: flex-start;
        }
        .step-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }
        .step-number {
            font-size: 2.8rem;
            font-weight: 800;
            background: var(--gradient-btn);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
            flex-shrink: 0;
        }
        .step-content h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .step-content p {
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }
        .insight-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .insight-card {
            padding: 28px;
            background: var(--bg-card);
            backdrop-filter: blur(15px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            transition: var(--transition-smooth);
        }
        .insight-card:hover {
            border-color: var(--border-glow);
        }
        .insight-card i {
            font-size: 2rem;
            color: var(--accent-cyan);
            margin-bottom: 14px;
        }
        .insight-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .insight-card p {
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }
        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(15px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition-smooth);
        }
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        .faq-question {
            padding: 22px 28px;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-answer {
            padding: 0 28px 22px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 100px;
            z-index: 1050;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(13, 17, 30, 0.75);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.5rem;
            cursor: pointer;
            transition: var(--transition-smooth);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            animation: fabPulse 2.5s infinite;
        }
        .fab-left:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.8);
            transform: scale(1.1);
        }
        @keyframes fabPulse {
            0%, 100% { box-shadow: 0 0 15px rgba(0, 240, 255, 0.5); }
            50% { box-shadow: 0 0 28px rgba(0, 240, 255, 0.75); }
        }
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 50px 0 30px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 30px;
        }
        .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            background: var(--gradient-btn);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 12px;
        }
        .footer-desc {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .footer-links h5 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
        }
        .footer-links ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 8px;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.95rem;
            transition: var(--transition-smooth);
        }
        .footer-links a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .insight-grid {
                grid-template-columns: 1fr;
            }
            .page-banner h1 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: flex-start;
                padding: 20px 24px;
                gap: 16px;
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition-smooth);
                z-index: 1049;
            }
            .nav-menu.active {
                transform: translateY(0);
                opacity: 1;
            }
            .mobile-toggle {
                display: block;
            }
            .page-banner h1 {
                font-size: 1.9rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
            .step-item {
                flex-direction: column;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.85);
            --accent-electric: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-subtle: rgba(0, 240, 255, 0.15);
            --border-glow: rgba(0, 240, 255, 0.4);
            --gradient-hero: linear-gradient(135deg, #08090F 0%, #0D111E 50%, #0052FF 100%);
            --gradient-btn: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --gradient-card-border: linear-gradient(135deg, #0052FF, #00F0FF);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --shadow-card: 0 8px 32px rgba(0, 82, 255, 0.15);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-heading: 'Segoe UI', sans-serif;
            --font-body: 'Segoe UI', sans-serif;
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .container-wide { max-width: 1320px; margin: 0 auto; padding: 0 24px; }
        a { text-decoration: none; color: inherit; transition: var(--transition-smooth); }
        img { max-width: 100%; height: auto; display: block; }
        button { cursor: pointer; border: none; outline: none; }
        .text-accent { color: var(--accent-cyan); }
        .text-muted { color: var(--text-muted); }
        /* Header / Navigation */
        .site-header {
            position: fixed; top: 0; left: 0; width: 100%; z-index: 1050;
            background: rgba(8, 9, 15, 0.88); backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition-smooth);
        }
        .site-header.scrolled { background: rgba(8, 9, 15, 0.96); box-shadow: 0 4px 20px rgba(0,0,0,0.5); }
        .navbar { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
        .navbar-brand {
            font-family: var(--font-heading); font-size: 1.35rem; font-weight: 700;
            background: var(--gradient-btn); -webkit-background-clip: text;
            -webkit-text-fill-color: transparent; background-clip: text;
            letter-spacing: -0.3px; white-space: nowrap;
        }
        .nav-menu { display: flex; align-items: center; gap: 28px; list-style: none; margin: 0; padding: 0; }
        .nav-menu a {
            font-size: 0.95rem; font-weight: 500; color: var(--text-secondary);
            position: relative; padding: 6px 0; transition: var(--transition-smooth); white-space: nowrap;
        }
        .nav-menu a:hover, .nav-menu a.active { color: var(--accent-cyan); }
        .nav-menu a.active::after {
            content: ''; position: absolute; bottom: -2px; left: 0; width: 100%;
            height: 2px; background: var(--accent-cyan); border-radius: 1px;
        }
        .nav-actions { display: flex; align-items: center; gap: 12px; }
        .btn-login {
            background: transparent; color: var(--text-secondary); border: 1px solid var(--border-subtle);
            padding: 8px 22px; border-radius: var(--radius-sm); font-weight: 600; font-size: 0.9rem;
            transition: var(--transition-smooth);
        }
        .btn-login:hover { border-color: var(--accent-cyan); color: var(--accent-cyan); }
        .btn-signup {
            background: var(--gradient-btn); color: #fff; padding: 9px 24px;
            border-radius: var(--radius-sm); font-weight: 700; font-size: 0.9rem;
            box-shadow: 0 4px 15px rgba(0,82,255,0.4); transition: var(--transition-smooth);
        }
        .btn-signup:hover { box-shadow: 0 6px 25px rgba(0,240,255,0.5); transform: translateY(-1px); color: #fff; }
        .mobile-toggle { display: none; background: none; color: var(--text-primary); font-size: 1.6rem; border: none; padding: 4px; }
        .btn-glow {
            background: var(--gradient-btn); color: #fff; font-weight: 700; padding: 14px 36px;
            border-radius: var(--radius-md); border: none; font-size: 1rem; transition: var(--transition-smooth);
            box-shadow: 0 4px 20px rgba(0,82,255,0.45); display: inline-block; text-align: center;
        }
        .btn-glow:hover { box-shadow: 0 8px 30px rgba(0,240,255,0.55); transform: translateY(-2px); color: #fff; }
        .btn-outline-glow {
            background: transparent; color: var(--accent-cyan); font-weight: 700; padding: 12px 34px;
            border-radius: var(--radius-md); border: 1px solid var(--border-glow); font-size: 1rem;
            transition: var(--transition-smooth); display: inline-block; text-align: center;
        }
        .btn-outline-glow:hover { background: rgba(0,240,255,0.08); box-shadow: var(--shadow-glow); color: var(--accent-cyan); }
        /* Article Hero Banner */
        .article-hero {
            position: relative; min-height: 420px; display: flex; align-items: center;
            background: var(--gradient-hero); margin-top: 72px; overflow: hidden;
        }
        .article-hero::before {
            content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.18; z-index: 0;
        }
        .article-hero-overlay { position: relative; z-index: 1; padding: 60px 0; }
        .article-badge {
            display: inline-block; background: rgba(0,240,255,0.15); color: var(--accent-cyan);
            padding: 6px 16px; border-radius: 20px; font-weight: 600; font-size: 0.85rem;
            margin-bottom: 16px; border: 1px solid var(--border-subtle);
        }
        .article-hero h1 {
            font-family: var(--font-heading); font-size: 2.8rem; font-weight: 800;
            line-height: 1.2; margin-bottom: 16px; color: #fff;
        }
        .article-meta-inline {
            display: flex; gap: 24px; color: var(--text-muted); font-size: 0.95rem;
            flex-wrap: wrap; align-items: center;
        }
        .article-meta-inline span { display: inline-flex; align-items: center; gap: 6px; }
        /* Article Body */
        .article-body-section { padding: 60px 0; }
        .article-content-card {
            background: var(--bg-card); border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg); padding: 48px; backdrop-filter: blur(16px);
        }
        .article-content-card img {
            border-radius: var(--radius-md); margin: 24px 0; width: 100%;
        }
        .article-content-card h2 {
            font-family: var(--font-heading); font-weight: 700; font-size: 1.75rem;
            margin: 32px 0 12px; color: var(--accent-cyan);
        }
        .article-content-card h3 {
            font-family: var(--font-heading); font-weight: 700; font-size: 1.4rem;
            margin: 24px 0 10px; color: #fff;
        }
        .article-content-card p {
            color: var(--text-secondary); margin-bottom: 16px; font-size: 1.05rem; line-height: 1.7;
        }
        .article-content-card ul, .article-content-card ol {
            color: var(--text-secondary); margin-bottom: 20px; padding-left: 24px;
        }
        .article-content-card li { margin-bottom: 8px; }
        .article-content-card blockquote {
            border-left: 3px solid var(--accent-cyan); background: rgba(0,240,255,0.05);
            padding: 20px 28px; border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--text-secondary); font-style: italic; margin: 28px 0;
        }
        .article-not-found {
            background: var(--bg-card); border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg); padding: 60px 40px; text-align: center;
        }
        .article-not-found h2 { font family: var(--font-heading); font-size: 2rem; margin-bottom: 16px; }
        .article-not-found p { color: var(--text-muted); margin-bottom: 24px; font-size: 1.1rem; }
        /* Promo CTA */
        .promo-cta-card {
            background: linear-gradient(135deg, rgba(0,82,255,0.15), rgba(0,240,255,0.08));
            border: 2px solid var(--border-glow); border-radius: var(--radius-lg); padding: 40px;
            margin: 40px 0 20px; display: flex; flex-wrap: wrap; align-items: center; gap: 28px;
            justify-content: space-between;
        }
        .promo-cta-card h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; }
        .promo-cta-card p { color: var(--text-secondary); margin: 0; }
        /* Footer */
        .site-footer { background: var(--bg-secondary); border-top: 1px solid var(--border-subtle); padding: 60px 0 30px; margin-top: 60px; }
        .footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px; margin-bottom: 30px; }
        .footer-brand { font-family: var(--font-heading); font-size: 1.3rem; font-weight: 700; color: var(--accent-cyan); margin-bottom: 12px; }
        .footer-desc { color: var(--text-muted); font-size: 0.95rem; line-height: 1.6; }
        .footer-links h5 { font-weight: 700; margin-bottom: 16px; color: #fff; font-size: 1.05rem; }
        .footer-links ul { list-style: none; padding: 0; }
        .footer-links ul li { margin-bottom: 10px; }
        .footer-links ul li a { color: var(--text-muted); font-size: 0.95rem; transition: var(--transition-smooth); }
        .footer-links ul li a:hover { color: var(--accent-cyan); }
        .footer-bottom { border-top: 1px solid var(--border-subtle); padding-top: 20px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; color: var(--text-muted); font-size: 0.85rem; }
        /* FAB */
        .fab-float {
            position: fixed; left: 24px; bottom: 92px; z-index: 1040;
            width: 56px; height: 56px; border-radius: 50px; display: flex; align-items: center; justify-content: center;
            background: var(--bg-card); backdrop-filter: blur(20px); border: 2px solid transparent;
            background-clip: padding-box; box-shadow: 0 8px 28px rgba(0,0,0,0.5);
            cursor: pointer; transition: var(--transition-smooth);
        }
        .fab-float::before {
            content: ''; position: absolute; inset: -2px; border-radius: 50px; padding: 2px;
            background: var(--gradient-card-border); -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
        }
        .fab-float i { font-size: 1.4rem; color: var(--accent-cyan); transition: var(--transition-smooth); }
        .fab-float:hover { transform: scale(1.08); box-shadow: 0 0 24px var(--accent-glow); }
        /* Responsive */
        @media (max-width: 992px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .article-hero h1 { font-size: 2.2rem; }
            .article-content-card { padding: 28px 20px; }
            .promo-cta-card { flex-direction: column; text-align: center; }
        }
        @media (max-width: 768px) {
            .nav-menu { position: fixed; top: 70px; left: 0; width: 100%; background: rgba(8,9,15,0.98); backdrop-filter: blur(20px); flex-direction: column; align-items: flex-start; padding: 20px 24px; gap: 16px; transform: translateY(-120%); opacity: 0; transition: var(--transition-smooth); border-bottom: 1px solid var(--border-subtle); }
            .nav-menu.active { transform: translateY(0); opacity: 1; }
            .mobile-toggle { display: block; }
            .nav-actions .btn-login, .nav-actions .btn-signup { display: inline-block; }
            .article-hero h1 { font-size: 1.8rem; }
            .article-content-card { padding: 20px 16px; }
            .footer-grid { grid-template-columns: 1fr; }
            .fab-float { left: 16px; bottom: 80px; width: 50px; height: 50px; }
        }
        @media (max-width: 520px) {
            .nav-actions .btn-login { padding: 6px 14px; font-size: 0.8rem; }
            .nav-actions .btn-signup { padding: 7px 16px; font-size: 0.8rem; }
            .article-hero h1 { font-size: 1.5rem; }
            .article-meta-inline { gap: 12px; font-size: 0.85rem; }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.85);
            --accent-electric: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-subtle: rgba(0, 240, 255, 0.15);
            --border-glow: rgba(0, 240, 255, 0.4);
            --gradient-hero: linear-gradient(135deg, #08090F 0%, #0D111E 50%, #0052FF 100%);
            --gradient-btn: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --gradient-card-border: linear-gradient(135deg, #0052FF, #00F0FF);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --shadow-card: 0 8px 32px rgba(0, 82, 255, 0.15);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-heading: 'Segoe UI', sans-serif;
            --font-body: 'Segoe UI', sans-serif;
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        html {
            scroll-behavior: smooth;
        }

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

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

        .container-wide {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 24px;
        }

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

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

        button {
            cursor: pointer;
            border: none;
            outline: none;
        }

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

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

        /* Header / Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition-smooth);
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.96);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }

        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
        }

        .navbar-brand {
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            background: var(--gradient-btn);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

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

        .nav-menu a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 6px 0;
            transition: var(--transition-smooth);
            white-space: nowrap;
        }

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

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 1px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-login {
            background: transparent;
            color: var(--text-secondary);
            border: 1px solid var(--border-subtle);
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition-smooth);
        }

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

        .btn-signup {
            background: var(--gradient-btn);
            color: #fff;
            padding: 9px 24px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
            transition: var(--transition-smooth);
        }

        .btn-signup:hover {
            box-shadow: 0 6px 25px rgba(0, 240, 255, 0.5);
            transform: translateY(-1px);
            color: #fff;
        }

        .mobile-toggle {
            display: none;
            background: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            border: none;
            padding: 4px;
        }

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

        .page-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 70%);
            border-radius: 50%;
        }

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

        .hero-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .hero-content h1 {
            font-family: var(--font-heading);
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .hero-content h1 span {
            background: var(--gradient-btn);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-content p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 32px;
            line-height: 1.7;
        }

        .hero-stats {
            display: flex;
            gap: 40px;
            margin-bottom: 32px;
        }

        .hero-stat h3 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-cyan);
            margin-bottom: 4px;
        }

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

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

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

        .section-title {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .section-subtitle {
            color: var(--text-secondary);
            font-size: 1rem;
            margin-bottom: 48px;
            line-height: 1.6;
        }

        /* Promo Cards */
        .promo-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 32px;
            backdrop-filter: blur(10px);
            transition: var(--transition-smooth);
            height: 100%;
            position: relative;
            overflow: hidden;
        }

        .promo-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--gradient-card-border);
            border-radius: 4px 0 0 4px;
        }

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

        .promo-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: rgba(0, 240, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent-cyan);
            margin-bottom: 20px;
        }

        .promo-card h3 {
            font-family: var(--font-heading);
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .promo-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .promo-tag {
            display: inline-block;
            background: rgba(255, 215, 0, 0.15);
            color: #FFD700;
            font-size: 0.8rem;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 50px;
            margin-bottom: 16px;
        }

        /* How It Works */
        .step-list {
            list-style: none;
            padding: 0;
            counter-reset: step-counter;
        }

        .step-list li {
            counter-increment: step-counter;
            position: relative;
            padding-left: 60px;
            margin-bottom: 36px;
        }

        .step-list li::before {
            content: counter(step-counter);
            position: absolute;
            left: 0;
            top: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--gradient-btn);
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .step-list h4 {
            font-family: var(--font-heading);
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

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

        /* Bonus Table */
        .bonus-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0 8px;
        }

        .bonus-table th {
            color: var(--text-muted);
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            padding: 12px 20px;
            text-align: left;
            letter-spacing: 0.5px;
        }

        .bonus-table td {
            background: var(--bg-card);
            padding: 16px 20px;
            border: 1px solid var(--border-subtle);
            font-size: 0.95rem;
            color: var(--text-primary);
        }

        .bonus-table tr td:first-child {
            border-radius: var(--radius-sm) 0 0 var(--radius-sm);
        }

        .bonus-table tr td:last-child {
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        }

        .bonus-value {
            color: var(--accent-cyan);
            font-weight: 700;
        }

        /* FAQ */
        .accordion-button {
            background: var(--bg-card) !important;
            color: var(--text-primary) !important;
            border: 1px solid var(--border-subtle) !important;
            border-radius: var(--radius-md) !important;
            padding: 18px 24px;
            font-weight: 600;
            box-shadow: none !important;
        }

        .accordion-button:not(.collapsed) {
            border-color: var(--border-glow) !important;
            background: rgba(0, 240, 255, 0.05) !important;
        }

        .accordion-button::after {
            filter: invert(1);
        }

        .accordion-body {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-top: none;
            border-radius: 0 0 var(--radius-md) var(--radius-md);
            padding: 20px 24px;
            color: var(--text-secondary);
        }

        .accordion-item {
            background: transparent;
            border: none;
            margin-bottom: 12px;
        }

        /* CTA */
        .cta-section {
            background: var(--gradient-hero);
            padding: 80px 0;
            text-align: left;
            position: relative;
            overflow: hidden;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
        }

        .btn-primary-glow {
            background: var(--gradient-btn);
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 4px 20px rgba(0, 82, 255, 0.5);
            transition: var(--transition-smooth);
            display: inline-block;
        }

        .btn-primary-glow:hover {
            box-shadow: 0 8px 30px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
            color: #fff;
        }

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

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

        .footer-brand {
            font-family: var(--font-heading);
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .footer-links h5 {
            font-family: var(--font-heading);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

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

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

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

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

        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            color: var(--text-muted);
            font-size: 0.85rem;
            flex-wrap: wrap;
            gap: 12px;
        }

        /* FAB */
        .fab-floating {
            position: fixed;
            left: 24px;
            bottom: 96px;
            z-index: 1055;
            width: 56px;
            height: 56px;
            border-radius: 50px;
            background: rgba(8, 9, 15, 0.7);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(8, 9, 15, 0.7), rgba(8, 9, 15, 0.7)), var(--gradient-card-border);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            transition: var(--transition-smooth);
            cursor: pointer;
        }

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

        /* Responsive */
        @media (max-width: 992px) {
            .hero-content h1 {
                font-size: 2.2rem;
            }

            .hero-stats {
                gap: 24px;
            }

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

        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: flex-start;
                padding: 20px 24px;
                gap: 16px;
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.3s ease;
                z-index: 1040;
            }

            .nav-menu.active {
                transform: translateY(0);
                opacity: 1;
            }

            .mobile-toggle {
                display: block;
            }

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

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .section {
                padding: 56px 0;
            }

            .promo-card {
                padding: 24px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.85);
            --accent-electric: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-subtle: rgba(0, 240, 255, 0.15);
            --border-glow: rgba(0, 240, 255, 0.4);
            --gradient-hero: linear-gradient(135deg, #08090F 0%, #0D111E 50%, #0052FF 100%);
            --gradient-btn: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --gradient-card-border: linear-gradient(135deg, #0052FF, #00F0FF);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --shadow-card: 0 8px 32px rgba(0, 82, 255, 0.15);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-heading: 'Segoe UI', sans-serif;
            --font-body: 'Segoe UI', sans-serif;
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        html {
            scroll-behavior: smooth;
        }

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

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

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

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

        button {
            cursor: pointer;
            border: none;
            outline: none;
        }

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

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

        /* Header / Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition-smooth);
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.96);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }

        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
        }

        .navbar-brand {
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            background: var(--gradient-btn);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

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

        .nav-menu a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 6px 0;
            transition: var(--transition-smooth);
            white-space: nowrap;
        }

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

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 1px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-login {
            background: transparent;
            color: var(--text-secondary);
            border: 1px solid var(--border-subtle);
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition-smooth);
            white-space: nowrap;
        }

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

        .btn-signup {
            background: var(--gradient-btn);
            color: #fff;
            padding: 9px 24px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
            transition: var(--transition-smooth);
            white-space: nowrap;
        }

        .btn-signup:hover {
            box-shadow: 0 6px 25px rgba(0, 240, 255, 0.5);
            transform: translateY(-1px);
            color: #fff;
        }

        .mobile-toggle {
            display: none;
            background: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            border: none;
            padding: 4px;
        }

        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: flex-start;
                padding: 20px 24px;
                gap: 16px;
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition-smooth);
                pointer-events: none;
            }

            .nav-menu.show {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .mobile-toggle {
                display: block;
            }
        }

        /* Page Hero */
        .page-hero {
            background: var(--gradient-hero);
            padding: 120px 0 60px;
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: -200px;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .page-hero h1 {
            font-family: var(--font-heading);
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
        }

        .page-hero .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 700px;
            margin-bottom: 32px;
            line-height: 1.7;
        }

        .hero-img-wrap {
            position: relative;
        }

        .hero-img-wrap img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-glow);
            width: 100%;
            object-fit: cover;
        }

        .btn-cta-primary {
            background: var(--gradient-btn);
            color: #fff;
            padding: 14px 40px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 4px 20px rgba(0, 82, 255, 0.5);
            transition: var(--transition-smooth);
            display: inline-block;
            border: none;
        }

        .btn-cta-primary:hover {
            box-shadow: 0 8px 30px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-outline-glow {
            background: transparent;
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 12px 32px;
            border-radius: var(--radius-md);
            font-weight: 600;
            transition: var(--transition-smooth);
        }

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

        /* Section */
        section {
            padding: 70px 0;
        }

        .section-label {
            display: inline-block;
            color: var(--accent-cyan);
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
        }

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

        .section-desc {
            color: var(--text-secondary);
            font-size: 1.05rem;
            line-height: 1.7;
            margin-bottom: 40px;
        }

        /* Promo Card */
        .promo-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 32px;
            transition: var(--transition-smooth);
            height: 100%;
            position: relative;
            overflow: hidden;
        }

        .promo-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--gradient-card-border);
            opacity: 0;
            transition: var(--transition-smooth);
        }

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

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

        .promo-icon {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-md);
            background: rgba(0, 240, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--accent-cyan);
            margin-bottom: 20px;
        }

        .promo-card h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .promo-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .promo-highlight {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 82, 255, 0.15);
            color: var(--accent-cyan);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 700;
        }

        /* Steps */
        .step-item {
            display: flex;
            gap: 20px;
            margin-bottom: 32px;
        }

        .step-number {
            width: 48px;
            height: 48px;
            min-width: 48px;
            border-radius: 50%;
            background: var(--gradient-btn);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            color: #fff;
            box-shadow: 0 0 15px rgba(0, 82, 255, 0.4);
        }

        .step-content h4 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

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

        /* Feature List */
        .feature-list {
            list-style: none;
            padding: 0;
        }

        .feature-list li {
            padding: 12px 0;
            border-bottom: 1px solid var(--border-subtle);
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--text-secondary);
        }

        .feature-list li i {
            color: var(--accent-cyan);
            margin-top: 3px;
        }

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

        /* Compare Table */
        .compare-table-wrap {
            overflow-x: auto;
        }

        .compare-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            font-size: 0.95rem;
        }

        .compare-table thead th {
            background: rgba(0, 82, 255, 0.2);
            color: var(--accent-cyan);
            padding: 14px 16px;
            text-align: left;
            font-weight: 700;
            border-bottom: 2px solid var(--border-glow);
        }

        .compare-table tbody td {
            padding: 13px 16px;
            border-bottom: 1px solid var(--border-subtle);
            color: var(--text-secondary);
            vertical-align: middle;
        }

        .compare-table tbody tr:hover td {
            background: rgba(0, 240, 255, 0.03);
        }

        .badge-glow {
            display: inline-block;
            background: var(--gradient-btn);
            color: #fff;
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 700;
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--bg-card);
            transition: var(--transition-smooth);
        }

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

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

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

        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }

        .faq-answer.show {
            display: block;
        }

        /* CTA */
        .cta-section {
            background: var(--gradient-hero);
            position: relative;
            overflow: hidden;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -100px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }

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

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

        .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 12px;
            background: var(--gradient-btn);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .footer-links h5 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-primary);
        }

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

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

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

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 20px;
            border-top: 1px solid var(--border-subtle);
            color: var(--text-muted);
            font-size: 0.85rem;
            flex-wrap: wrap;
            gap: 10px;
        }

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

            .page-hero h1 {
                font-size: 2rem;
            }

            .section-title {
                font-size: 1.7rem;
            }

            .promo-card {
                padding: 24px;
            }

            .compare-table thead th,
            .compare-table tbody td {
                padding: 10px 12px;
                font-size: 0.85rem;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.85);
            --accent-electric: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-subtle: rgba(0, 240, 255, 0.15);
            --border-glow: rgba(0, 240, 255, 0.4);
            --gradient-hero: linear-gradient(135deg, #08090F 0%, #0D111E 50%, #0052FF 100%);
            --gradient-btn: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --gradient-card-border: linear-gradient(135deg, #0052FF, #00F0FF);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);
            --shadow-card: 0 8px 32px rgba(0, 82, 255, 0.15);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-heading: 'Segoe UI', sans-serif;
            --font-body: 'Segoe UI', sans-serif;
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        html {
            scroll-behavior: smooth;
        }

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

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

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

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

        button {
            cursor: pointer;
            border: none;
            outline: none;
        }

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

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

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition-smooth);
        }

        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.96);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }

        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
        }

        .navbar-brand {
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            background: var(--gradient-btn);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

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

        .nav-menu a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 6px 0;
            transition: var(--transition-smooth);
            white-space: nowrap;
        }

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

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 1px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-login {
            background: transparent;
            color: var(--text-secondary);
            border: 1px solid var(--border-subtle);
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition-smooth);
        }

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

        .btn-signup {
            background: var(--gradient-btn);
            color: #fff;
            padding: 9px 24px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
            transition: var(--transition-smooth);
        }

        .btn-signup:hover {
            box-shadow: 0 6px 25px rgba(0, 240, 255, 0.5);
            transform: translateY(-1px);
            color: #fff;
        }

        .mobile-toggle {
            display: none;
            background: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            border: none;
            padding: 4px;
        }

        @media (max-width: 992px) {
            .nav-menu {
                position: fixed;
                top: 68px;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: flex-start;
                padding: 20px 24px;
                gap: 16px;
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                border-bottom: 1px solid var(--border-subtle);
                z-index: 1049;
            }
            .nav-menu.active {
                transform: translateY(0);
                opacity: 1;
            }
            .mobile-toggle {
                display: block;
            }
        }

        @media (max-width: 520px) {
            .navbar-brand {
                font-size: 1.15rem;
            }
            .btn-login,
            .btn-signup {
                padding: 7px 16px;
                font-size: 0.82rem;
            }
            .nav-actions {
                gap: 8px;
            }
        }

        /* Hero */
        .hero-section {
            padding-top: 160px;
            padding-bottom: 100px;
            background: var(--gradient-hero);
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0,240,255,0.08) 0%, transparent 70%);
            border-radius: 50%;
            z-index: 0;
        }

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

        .hero-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 8px 20px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 20px;
            backdrop-filter: blur(10px);
        }

        .hero-title {
            font-family: var(--font-heading);
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            color: var(--text-primary);
        }

        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 650px;
        }

        .hero-stats {
            display: flex;
            gap: 40px;
            margin-bottom: 32px;
        }

        .hero-stat h4 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 4px;
        }

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

        .btn-primary-glow {
            background: var(--gradient-btn);
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-lg);
            font-weight: 700;
            font-size: 1.1rem;
            border: none;
            box-shadow: var(--shadow-glow);
            transition: var(--transition-smooth);
            display: inline-block;
            text-align: center;
        }

        .btn-primary-glow:hover {
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
            color: #fff;
        }

        .hero-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-card);
        }

        @media (max-width: 992px) {
            .hero-section {
                padding-top: 130px;
                padding-bottom: 60px;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-stats {
                gap: 24px;
                flex-wrap: wrap;
            }
        }

        @media (max-width: 768px) {
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 16px;
            }
            .hero-stat h4 {
                font-size: 1.5rem;
            }
        }

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

        .section-title {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .section-subtitle {
            color: var(--text-muted);
            font-size: 1rem;
            margin-bottom: 40px;
        }

        /* Pain Points */
        .pain-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px;
            backdrop-filter: blur(10px);
            transition: var(--transition-smooth);
            height: 100%;
            position: relative;
            overflow: hidden;
        }

        .pain-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--gradient-card-border);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.5s ease;
        }

        .pain-card:hover::after {
            transform: scaleX(1);
        }

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

        .pain-icon {
            font-size: 2.2rem;
            color: var(--accent-cyan);
            margin-bottom: 16px;
            display: block;
        }

        .pain-card h4 {
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 8px;
        }

        .pain-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin: 0;
            line-height: 1.6;
        }

        /* Strategy Steps */
        .strategy-step {
            display: flex;
            gap: 24px;
            align-items: flex-start;
            margin-bottom: 40px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 30px;
            backdrop-filter: blur(10px);
            transition: var(--transition-smooth);
        }

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

        .step-number {
            flex-shrink: 0;
            width: 55px;
            height: 55px;
            background: var(--gradient-btn);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.4rem;
            color: #fff;
            box-shadow: var(--shadow-glow);
        }

        .step-body h4 {
            font-weight: 700;
            font-size: 1.25rem;
            margin-bottom: 6px;
        }

        .step-body p {
            color: var(--text-secondary);
            margin-bottom: 12px;
            line-height: 1.65;
        }

        .step-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .step-tag {
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-subtle);
            color: var(--accent-cyan);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
        }

        /* Testimonial */
        .testimonial-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 32px;
            backdrop-filter: blur(10px);
            height: 100%;
            transition: var(--transition-smooth);
        }

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

        .testimonial-stars {
            color: #FFD700;
            margin-bottom: 12px;
            font-size: 1rem;
        }

        .testimonial-text {
            font-style: italic;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .testimonial-author {
            font-weight: 700;
            color: var(--accent-cyan);
        }

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

        /* Faq */
        .accordion-faq .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
        }

        .accordion-faq .accordion-header button {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            padding: 18px 24px;
            box-shadow: none;
            border: none;
            width: 100%;
            text-align: left;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .accordion-faq .accordion-header button:focus {
            box-shadow: none;
            border-color: var(--accent-cyan);
        }

        .accordion-faq .accordion-header button:not(.collapsed) {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.05);
        }

        .accordion-faq .accordion-body {
            color: var(--text-secondary);
            line-height: 1.7;
            padding: 0 24px 18px;
        }

        .accordion-faq .accordion-button::after {
            filter: brightness(0) invert(1);
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.2) 0%, rgba(0, 240, 255, 0.15) 100%);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 60px 40px;
            text-align: center;
            backdrop-filter: blur(10px);
            margin: 60px 0;
        }

        .cta-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-desc {
            color: var(--text-secondary);
            margin-bottom: 28px;
            font-size: 1.05rem;
        }

        @media (max-width: 768px) {
            .section-padding {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .strategy-step {
                flex-direction: column;
                gap: 16px;
                padding: 20px;
            }
            .cta-section {
                padding: 40px 20px;
                margin: 30px 0;
            }
            .cta-title {
                font-size: 1.5rem;
            }
        }

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

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

        .footer-brand {
            font-family: var(--font-heading);
            font-size: 1.3rem;
            font-weight: 700;
            background: var(--gradient-btn);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 12px;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .footer-links h5 {
            font-weight: 700;
            margin-bottom: 16px;
            font-size: 1rem;
            color: var(--text-primary);
        }

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

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

        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition-smooth);
        }

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

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

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
        }

        /* FAB */
        .fab-float {
            position: fixed;
            left: 20px;
            bottom: 80px;
            z-index: 1040;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), var(--gradient-card-border);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.5rem;
            box-shadow: var(--shadow-glow);
            transition: var(--transition-smooth);
            cursor: pointer;
            animation: fab-breath 2.5s ease-in-out infinite;
        }

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

        @keyframes fab-breath {
            0%, 100% { opacity: 0.7; box-shadow: 0 0 18px rgba(0,240,255,0.35); }
            50% { opacity: 1; box-shadow: 0 0 30px rgba(0,240,255,0.6); }
        }

        @media (max-width: 768px) {
            .fab-float {
                left: 14px;
                bottom: 70px;
                width: 48px;
                height: 48px;
                font-size: 1.3rem;
            }
        }