/* roulang page: index */
:root {
            --bg-primary: #0F0C20;
            --bg-secondary: #0B1A30;
            --bg-card: #16122B;
            --accent-primary: #CCFF00;
            --accent-secondary: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --border-glow: rgba(0, 240, 255, 0.25);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-lime: 0 0 12px rgba(204, 255, 0, 0.4);
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

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

        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;
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Typography */
        h1, h2, h3, h4, .navbar-brand, .btn {
            font-family: var(--font-heading);
        }

        h1 {
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            line-height: 1.2;
        }

        h2 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.3px;
            margin-bottom: 1.2rem;
        }

        .section-title {
            color: var(--accent-secondary);
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 2.5rem;
        }

        .section-title i {
            font-size: 1.8rem;
            color: var(--accent-primary);
        }

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

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

        /* Navbar */
        .navbar {
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.18);
            padding: 10px 0;
            transition: var(--transition-base);
            z-index: 1000;
        }

        .navbar-brand {
            font-weight: 800;
            font-size: 1.6rem;
            color: var(--accent-primary) !important;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .navbar-brand i {
            color: var(--accent-secondary);
            font-size: 1.8rem;
        }

        .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 600;
            margin: 0 6px;
            padding: 8px 16px !important;
            border-radius: 30px;
            transition: var(--transition-base);
            font-size: 0.95rem;
        }

        .nav-link:hover, .nav-link.active {
            color: #FFFFFF !important;
            background: rgba(0, 240, 255, 0.12);
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.7);
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-secondary);
            color: var(--accent-secondary);
            border-radius: 30px;
            padding: 8px 22px;
            font-weight: 700;
            transition: var(--transition-base);
        }

        .btn-login:hover {
            background: rgba(0, 240, 255, 0.15);
            color: #fff;
            border-color: #fff;
        }

        .btn-signup {
            background: var(--accent-primary);
            border: none;
            color: #0F0C20;
            border-radius: 30px;
            padding: 10px 24px;
            font-weight: 800;
            transition: var(--transition-base);
            box-shadow: var(--shadow-lime);
        }

        .btn-signup:hover {
            background: #e0ff4d;
            color: #000;
            transform: translateY(-2px);
            box-shadow: 0 0 18px rgba(204, 255, 0, 0.7);
        }

        /* Hero Section */
        .hero-section {
            padding: 140px 0 80px;
            background: radial-gradient(circle at 20% 30%, rgba(0, 240, 255, 0.08) 0%, transparent 50%);
            position: relative;
        }

        .hero-icon-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 35px;
        }

        .hero-icon-item {
            background: rgba(22, 18, 43, 0.8);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: var(--transition-base);
            flex: 1 1 auto;
            min-width: 130px;
        }

        .hero-icon-item i {
            font-size: 2.2rem;
            color: var(--accent-secondary);
        }

        .status-bar {
            background: rgba(0, 240, 255, 0.12);
            border-radius: 30px;
            padding: 6px 18px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 25px;
            font-weight: 600;
            color: var(--accent-primary);
            border: 1px solid rgba(204, 255, 0, 0.25);
        }

        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 650px;
            margin: 25px 0 35px;
            line-height: 1.7;
        }

        .btn-cta {
            background: var(--accent-primary);
            color: #0F0C20;
            font-weight: 800;
            padding: 14px 34px;
            border-radius: 40px;
            font-size: 1.1rem;
            border: none;
            transition: var(--transition-base);
            box-shadow: var(--shadow-lime);
            text-transform: uppercase;
            letter-spacing: 0.6px;
        }

        .btn-cta:hover {
            background: #fff;
            color: #000;
            transform: scale(1.05);
        }

        /* Sections General */
        section {
            padding: 70px 0;
        }

        .bg-dark-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px;
            border: 1px solid rgba(0, 240, 255, 0.12);
            transition: var(--transition-base);
            height: 100%;
        }

        .bg-dark-card:hover {
            border-color: var(--accent-secondary);
            box-shadow: 0 10px 28px rgba(0, 0, 0, 0.6);
        }

        /* Game Intro / Play Steps */
        .step-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
            gap: 25px;
        }

        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 25px;
            border-left: 5px solid var(--accent-primary);
            transition: var(--transition-base);
        }

        .step-item:hover {
            border-left-color: var(--accent-secondary);
            background: #1f1a38;
        }

        /* Reward Preview */
        .reward-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 22px;
        }

        .reward-card {
            background: linear-gradient(145deg, #1B1635, #0E0A1F);
            border-radius: var(--radius-md);
            padding: 22px 15px;
            text-align: center;
            border: 1px solid rgba(204, 255, 0, 0.3);
        }

        /* Progress */
        .progress-custom {
            background: #2A2540;
            border-radius: 20px;
            height: 12px;
        }

        .progress-bar-custom {
            background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
            border-radius: 20px;
        }

        /* News list */
        .news-list-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            margin-bottom: 16px;
            border: 1px solid transparent;
            transition: var(--transition-base);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 15px;
        }

        .news-list-item:hover {
            border-color: var(--accent-secondary);
        }

        .news-title-link {
            color: #fff;
            font-weight: 700;
            text-decoration: none;
            font-size: 1.05rem;
        }

        .news-meta {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 24px;
            bottom: 60px;
            z-index: 1050;
            width: 56px;
            height: 56px;
            background: rgba(15, 12, 32, 0.7);
            backdrop-filter: blur(12px);
            border-radius: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 2px solid transparent;
            background-clip: padding-box;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.55);
            transition: var(--transition-base);
            cursor: pointer;
            animation: pulse-neon 2s infinite;
        }

        .fab-left i {
            font-size: 1.8rem;
            color: var(--accent-secondary);
        }

        .fab-left:hover {
            transform: scale(1.12);
            border-color: var(--accent-primary);
            box-shadow: 0 0 28px rgba(204, 255, 0, 0.7);
        }

        @keyframes pulse-neon {
            0% { box-shadow: 0 0 8px rgba(0, 240, 255, 0.5); }
            50% { box-shadow: 0 0 22px rgba(0, 240, 255, 0.8); }
            100% { box-shadow: 0 0 8px rgba(0, 240, 255, 0.5); }
        }

        footer {
            background: #080711;
            border-top: 1px solid rgba(0, 240, 255, 0.2);
            padding: 38px 0 22px;
            color: var(--text-secondary);
        }

        @media (max-width: 768px) {
            h1 { font-size: 2rem; }
            .navbar-collapse { background: rgba(10, 8, 22, 0.98); padding: 20px; border-radius: 12px; }
            .hero-section { padding: 110px 0 50px; }
        }

/* roulang page: article */
:root {
            --bg-primary: #0F0C20;
            --bg-secondary: #0B1A30;
            --bg-card: #16122B;
            --accent-primary: #CCFF00;
            --accent-secondary: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --border-glow: rgba(0, 240, 255, 0.25);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-lime: 0 0 12px rgba(204, 255, 0, 0.4);
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

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

        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            margin: 0;
            padding: 0;
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        h1, h2, h3, h4, .navbar-brand, .btn {
            font-family: var(--font-heading);
        }

        a {
            color: var(--accent-secondary);
            text-decoration: none;
            transition: var(--transition-base);
        }

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

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

        /* Navbar */
        .navbar {
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.18);
            padding: 10px 0;
            transition: var(--transition-base);
            z-index: 1000;
        }

        .navbar-brand {
            font-weight: 800;
            font-size: 1.6rem;
            color: var(--accent-primary) !important;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .navbar-brand i {
            color: var(--accent-secondary);
            font-size: 1.8rem;
        }

        .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 600;
            margin: 0 6px;
            padding: 8px 16px !important;
            border-radius: 30px;
            transition: var(--transition-base);
            font-size: 0.95rem;
        }

        .nav-link:hover, .nav-link.active {
            color: #FFFFFF !important;
            background: rgba(0, 240, 255, 0.12);
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.7);
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-secondary);
            color: var(--accent-secondary);
            border-radius: 30px;
            padding: 8px 22px;
            font-weight: 700;
            transition: var(--transition-base);
            font-size: 0.9rem;
        }

        .btn-login:hover {
            background: rgba(0, 240, 255, 0.15);
            color: #fff;
            border-color: #fff;
            box-shadow: var(--shadow-neon);
        }

        .btn-signup {
            background: var(--accent-primary);
            border: none;
            color: #0F0C20;
            border-radius: 30px;
            padding: 10px 24px;
            font-weight: 800;
            transition: var(--transition-base);
            box-shadow: var(--shadow-lime);
            font-size: 0.9rem;
        }

        .btn-signup:hover {
            background: #e0ff4d;
            color: #000;
            transform: translateY(-2px);
            box-shadow: 0 0 22px rgba(204, 255, 0, 0.85);
        }

        /* Article Banner */
        .article-banner {
            padding: 140px 0 60px;
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.05) 0%, rgba(204, 255, 0, 0.03) 100%);
            position: relative;
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
        }

        .article-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            pointer-events: none;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            color: var(--text-secondary);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: var(--accent-secondary);
        }

        .article-category-badge {
            background: rgba(0, 240, 255, 0.15);
            color: var(--accent-secondary);
            padding: 6px 18px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.85rem;
            border: 1px solid rgba(0, 240, 255, 0.35);
        }

        .article-h1 {
            font-size: 2.6rem;
            font-weight: 900;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 15px;
            text-shadow: 0 2px 10px rgba(0,0,0,0.5);
        }

        /* Article Content Section */
        .article-content-section {
            padding: 50px 0 70px;
        }

        .article-body-wrapper {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid rgba(0, 240, 255, 0.12);
            box-shadow: 0 20px 50px rgba(0,0,0,0.5);
        }

        .article-body-wrapper img {
            border-radius: var(--radius-md);
            margin: 25px 0;
        }

        .article-body-wrapper h2 {
            color: var(--accent-secondary);
            font-weight: 800;
            margin-top: 35px;
            margin-bottom: 18px;
            font-size: 1.8rem;
        }

        .article-body-wrapper h3 {
            color: #fff;
            font-weight: 700;
            margin-top: 28px;
            margin-bottom: 12px;
            font-size: 1.4rem;
        }

        .article-body-wrapper p {
            color: var(--text-secondary);
            margin-bottom: 18px;
            font-size: 1.05rem;
            line-height: 1.75;
        }

        .article-body-wrapper ul, .article-body-wrapper ol {
            margin-bottom: 25px;
            padding-left: 24px;
            color: var(--text-secondary);
        }

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

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }

        .article-not-found i {
            font-size: 4rem;
            color: var(--accent-secondary);
            margin-bottom: 20px;
            display: block;
        }

        .article-not-found h3 {
            font-size: 1.8rem;
            color: #fff;
            margin-bottom: 15px;
        }

        .article-not-found .btn-cta {
            margin-top: 20px;
        }

        .btn-cta {
            background: var(--accent-primary);
            color: #0F0C20;
            font-weight: 800;
            padding: 14px 34px;
            border-radius: 40px;
            font-size: 1.05rem;
            border: none;
            transition: var(--transition-base);
            box-shadow: var(--shadow-lime);
            text-transform: uppercase;
            letter-spacing: 0.6px;
            display: inline-block;
        }

        .btn-cta:hover {
            background: #fff;
            color: #000;
            transform: scale(1.05);
            box-shadow: 0 0 30px rgba(204, 255, 0, 0.9);
        }

        /* Related CTA */
        .cta-block {
            margin-top: 50px;
            padding: 35px;
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.1), rgba(204, 255, 0, 0.08));
            border-radius: var(--radius-lg);
            border: 1px solid rgba(0, 240, 255, 0.25);
            text-align: center;
        }

        .cta-block h3 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 12px;
        }

        /* Footer */
        footer {
            background: var(--bg-card);
            padding: 35px 0;
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            text-align: center;
            color: var(--text-secondary);
        }

        footer strong {
            color: var(--accent-primary);
        }

        /* Responsive */
        @media (max-width: 992px) {
            .article-h1 {
                font-size: 2rem;
            }
            .article-body-wrapper {
                padding: 25px;
            }
        }

        @media (max-width: 768px) {
            .navbar-brand {
                font-size: 1.3rem;
            }
            .article-h1 {
                font-size: 1.6rem;
            }
            .article-body-wrapper h2 {
                font-size: 1.4rem;
            }
            .article-meta {
                gap: 12px;
                font-size: 0.85rem;
            }
            .btn-login, .btn-signup {
                padding: 6px 16px;
                font-size: 0.8rem;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0F0C20;
            --bg-secondary: #0B1A30;
            --bg-card: #16122B;
            --accent-primary: #CCFF00;
            --accent-secondary: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --border-glow: rgba(0, 240, 255, 0.25);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-lime: 0 0 12px rgba(204, 255, 0, 0.4);
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            margin: 0;
            padding: 0;
        }

        h1, h2, h3, h4, h5, h6, .navbar-brand, .btn {
            font-family: var(--font-heading);
        }

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

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

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Navbar */
        .navbar {
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.18);
            padding: 10px 0;
            transition: var(--transition-base);
            z-index: 1000;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.6rem;
            color: var(--accent-primary) !important;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .navbar-brand i {
            color: var(--accent-secondary);
            font-size: 1.8rem;
        }
        .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 600;
            margin: 0 6px;
            padding: 8px 16px !important;
            border-radius: 30px;
            transition: var(--transition-base);
            font-size: 0.95rem;
        }
        .nav-link:hover, .nav-link.active {
            color: #FFFFFF !important;
            background: rgba(0, 240, 255, 0.12);
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.7);
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-secondary);
            color: var(--accent-secondary);
            border-radius: 30px;
            padding: 8px 22px;
            font-weight: 700;
            transition: var(--transition-base);
        }
        .btn-login:hover {
            background: rgba(0, 240, 255, 0.15);
            color: #fff;
            border-color: #fff;
        }
        .btn-signup {
            background: var(--accent-primary);
            border: none;
            color: #0F0C20;
            border-radius: 30px;
            padding: 10px 24px;
            font-weight: 800;
            transition: var(--transition-base);
            box-shadow: var(--shadow-lime);
        }
        .btn-signup:hover {
            background: #e0ff4d;
            color: #000;
            transform: translateY(-2px);
            box-shadow: 0 0 18px rgba(204, 255, 0, 0.7);
        }

        /* Hero Section */
        .hero-section {
            padding: 140px 0 80px;
            background: radial-gradient(circle at 20% 30%, rgba(0, 240, 255, 0.08) 0%, transparent 50%);
            position: relative;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(204, 255, 0, 0.15);
            color: var(--accent-primary);
            font-weight: 700;
            padding: 8px 20px;
            border-radius: 40px;
            font-size: 0.9rem;
            margin-bottom: 20px;
            border: 1px solid rgba(204, 255, 0, 0.3);
        }
        .hero-title {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 20px;
            color: #fff;
        }
        .hero-title span {
            color: var(--accent-primary);
        }
        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 650px;
            margin: 25px 0 35px;
            line-height: 1.7;
        }
        .btn-cta {
            background: var(--accent-primary);
            color: #0F0C20;
            font-weight: 800;
            padding: 14px 34px;
            border-radius: 40px;
            font-size: 1.1rem;
            border: none;
            transition: var(--transition-base);
            box-shadow: var(--shadow-lime);
            text-transform: uppercase;
            letter-spacing: 0.6px;
            display: inline-block;
        }
        .btn-cta:hover {
            background: #fff;
            color: #000;
            transform: scale(1.05);
        }
        .hero-stats {
            display: flex;
            gap: 30px;
            flex-wrap: wrap;
            margin-top: 25px;
        }
        .hero-stat-item {
            text-align: left;
        }
        .hero-stat-number {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--accent-secondary);
            line-height: 1;
        }
        .hero-stat-label {
            color: var(--text-secondary);
            font-size: 0.85rem;
            margin-top: 5px;
        }

        /* Section Titles */
        .section-title {
            color: var(--accent-secondary);
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 2.5rem;
            font-size: 2rem;
        }
        .section-title i {
            font-size: 1.8rem;
            color: var(--accent-primary);
        }
        .text-accent {
            color: var(--accent-primary);
        }
        .text-cyan {
            color: var(--accent-secondary);
        }

        /* Cards */
        .bg-dark-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px;
            border: 1px solid rgba(0, 240, 255, 0.12);
            transition: var(--transition-base);
            height: 100%;
        }
        .bg-dark-card:hover {
            border-color: var(--accent-secondary);
            box-shadow: 0 10px 28px rgba(0, 0, 0, 0.6);
        }

        /* Promo Cards */
        .promo-card {
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, 0.15);
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .promo-card:hover {
            border-color: var(--accent-secondary);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.7);
            transform: translateY(-5px);
        }
        .promo-card-header {
            padding: 28px 28px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            position: relative;
        }
        .promo-tag {
            position: absolute;
            top: 20px;
            right: 20px;
            background: var(--accent-primary);
            color: #0F0C20;
            font-weight: 800;
            font-size: 0.75rem;
            padding: 5px 14px;
            border-radius: 30px;
            text-transform: uppercase;
        }
        .promo-card-body {
            padding: 24px 28px 28px;
        }
        .promo-percent {
            font-size: 3rem;
            font-weight: 900;
            color: var(--accent-primary);
            line-height: 1;
            margin-bottom: 5px;
        }
        .promo-condition {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 18px;
        }
        .promo-feature-list {
            list-style: none;
            padding: 0;
            margin: 0 0 22px 0;
        }
        .promo-feature-list li {
            padding: 6px 0 6px 28px;
            position: relative;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        .promo-feature-list li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            color: var(--accent-primary);
            font-size: 0.8rem;
        }
        .btn-promo {
            background: transparent;
            border: 1px solid var(--accent-primary);
            color: var(--accent-primary);
            border-radius: 30px;
            padding: 10px 28px;
            font-weight: 700;
            transition: var(--transition-base);
            display: inline-block;
            text-align: center;
        }
        .btn-promo:hover {
            background: var(--accent-primary);
            color: #000;
            box-shadow: var(--shadow-lime);
        }

        /* How to claim */
        .step-visual {
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }
        .step-dot {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid var(--accent-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--accent-secondary);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.25);
            position: relative;
            z-index: 2;
        }
        .step-line {
            flex: 1;
            min-width: 60px;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-secondary), transparent);
            margin: 0 10px;
        }
        .step-label {
            text-align: center;
            margin-top: 10px;
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.85rem;
        }

        /* FAQ */
        .accordion-button {
            background: var(--bg-card) !important;
            color: #fff !important;
            font-weight: 600;
            border: 1px solid rgba(0, 240, 255, 0.15) !important;
            border-radius: var(--radius-md) !important;
            padding: 18px 22px;
            transition: var(--transition-base);
        }
        .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.08) !important;
            color: var(--accent-secondary) !important;
            box-shadow: none !important;
            border-color: var(--accent-secondary) !important;
        }
        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.2) !important;
        }
        .accordion-item {
            background: transparent !important;
            border: none !important;
            margin-bottom: 14px;
        }
        .accordion-body {
            background: rgba(22, 18, 43, 0.6);
            color: var(--text-secondary);
            border-radius: 0 0 var(--radius-md) var(--radius-md);
            padding: 20px 22px;
        }

        /* CTA Banner */
        .cta-banner {
            background: linear-gradient(135deg, #1A1535 0%, #0F1B2D 100%);
            border-radius: var(--radius-xl);
            padding: 50px 40px;
            border: 1px solid rgba(0, 240, 255, 0.25);
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(204, 255, 0, 0.2) 0%, transparent 70%);
            border-radius: 50%;
        }

        /* Footer */
        footer {
            background: var(--bg-secondary);
            padding: 30px 0;
            border-top: 1px solid rgba(255,255,255,0.06);
            margin-top: 60px;
        }
        footer p {
            margin-bottom: 6px;
        }

        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent-primary);
            color: #000;
            border: none;
            font-size: 1.3rem;
            cursor: pointer;
            box-shadow: var(--shadow-lime);
            transition: var(--transition-base);
            display: none;
        }
        .back-to-top:hover {
            transform: translateY(-4px);
            background: #fff;
        }

        /* Mobile adjustments */
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2rem;
            }
            .hero-stats {
                gap: 15px;
            }
            .hero-stat-number {
                font-size: 1.8rem;
            }
            .promo-percent {
                font-size: 2.2rem;
            }
            section {
                padding: 50px 0;
            }
            .hero-section {
                padding: 120px 0 50px;
            }
            .cta-banner {
                padding: 35px 20px;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-stats {
                flex-direction: column;
                gap: 12px;
            }
            .step-visual {
                flex-direction: column;
                gap: 20px;
            }
            .step-line {
                display: none;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0F0C20;
            --bg-secondary: #0B1A30;
            --bg-card: #16122B;
            --accent-primary: #CCFF00;
            --accent-secondary: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --border-glow: rgba(0, 240, 255, 0.25);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-lime: 0 0 12px rgba(204, 255, 0, 0.4);
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        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;
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        h1, h2, h3, h4, .navbar-brand, .btn {
            font-family: var(--font-heading);
        }

        a {
            color: var(--accent-secondary);
            text-decoration: none;
            transition: var(--transition-base);
        }

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

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

        button {
            cursor: pointer;
        }

        .section-title {
            color: var(--accent-secondary);
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 2.5rem;
        }

        .section-title i {
            font-size: 1.8rem;
            color: var(--accent-primary);
        }

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

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

        /* Navbar */
        .navbar {
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.18);
            padding: 10px 0;
            transition: var(--transition-base);
            z-index: 1000;
        }

        .navbar-brand {
            font-weight: 800;
            font-size: 1.6rem;
            color: var(--accent-primary) !important;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .navbar-brand i {
            color: var(--accent-secondary);
            font-size: 1.8rem;
        }

        .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 600;
            margin: 0 6px;
            padding: 8px 16px !important;
            border-radius: 30px;
            transition: var(--transition-base);
            font-size: 0.95rem;
        }

        .nav-link:hover, .nav-link.active {
            color: #FFFFFF !important;
            background: rgba(0, 240, 255, 0.12);
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.7);
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-secondary);
            color: var(--accent-secondary);
            border-radius: 30px;
            padding: 8px 22px;
            font-weight: 700;
            transition: var(--transition-base);
        }

        .btn-login:hover {
            background: rgba(0, 240, 255, 0.15);
            color: #fff;
            border-color: #fff;
        }

        .btn-signup {
            background: var(--accent-primary);
            border: none;
            color: #0F0C20;
            border-radius: 30px;
            padding: 10px 24px;
            font-weight: 800;
            transition: var(--transition-base);
            box-shadow: var(--shadow-lime);
        }

        .btn-signup:hover {
            background: #e0ff4d;
            color: #000;
            transform: translateY(-2px);
            box-shadow: 0 0 18px rgba(204, 255, 0, 0.7);
        }

        /* Hero Section */
        .hero-section {
            padding: 140px 0 80px;
            background: radial-gradient(circle at 80% 40%, rgba(0, 240, 255, 0.08) 0%, transparent 50%);
            position: relative;
        }

        .hero-tag {
            background: rgba(0, 240, 255, 0.12);
            color: var(--accent-secondary);
            display: inline-block;
            padding: 6px 20px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.9rem;
            border: 1px solid var(--border-glow);
            margin-bottom: 20px;
        }

        .hero-value-points {
            display: flex;
            flex-direction: column;
            gap: 18px;
            margin-top: 30px;
        }

        .hero-value-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 18px;
            background: rgba(22, 18, 43, 0.7);
            backdrop-filter: blur(6px);
            border-radius: var(--radius-md);
            border: 1px solid rgba(0, 240, 255, 0.2);
            transition: var(--transition-base);
        }

        .hero-value-item:hover {
            border-color: var(--accent-secondary);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.15);
        }

        .hero-value-item i {
            font-size: 2rem;
            color: var(--accent-primary);
        }

        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 650px;
            margin: 25px 0 35px;
            line-height: 1.7;
        }

        .btn-cta {
            background: var(--accent-primary);
            color: #0F0C20;
            font-weight: 800;
            padding: 14px 34px;
            border-radius: 40px;
            font-size: 1.1rem;
            border: none;
            transition: var(--transition-base);
            box-shadow: var(--shadow-lime);
            text-transform: uppercase;
            letter-spacing: 0.6px;
        }

        .btn-cta:hover {
            background: #fff;
            color: #000;
            transform: scale(1.05);
        }

        .hero-img-wrapper {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-glow);
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.7);
        }

        .hero-img-wrapper img {
            width: 100%;
            display: block;
        }

        /* Sections General */
        section {
            padding: 70px 0;
        }

        .bg-dark-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px;
            border: 1px solid rgba(0, 240, 255, 0.12);
            transition: var(--transition-base);
            height: 100%;
        }

        .bg-dark-card:hover {
            border-color: var(--accent-secondary);
            box-shadow: 0 10px 28px rgba(0, 0, 0, 0.6);
        }

        /* Promo Stats Dashboard */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 25px;
        }

        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 30px 20px;
            text-align: center;
            border: 1px solid var(--border-glow);
            transition: var(--transition-base);
        }

        .stat-card:hover {
            box-shadow: var(--shadow-neon);
            border-color: var(--accent-secondary);
        }

        .stat-number {
            font-size: 3rem;
            font-weight: 900;
            color: var(--accent-primary);
            line-height: 1;
            margin-bottom: 10px;
        }

        .stat-label {
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 1.05rem;
        }

        /* Service Matrix */
        .promo-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .promo-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 35px 25px;
            border: 1px solid rgba(0, 240, 255, 0.15);
            transition: var(--transition-base);
            text-align: left;
        }

        .promo-card:hover {
            border-color: var(--accent-primary);
            box-shadow: var(--shadow-lime);
            transform: translateY(-6px);
        }

        .promo-icon {
            font-size: 2.8rem;
            color: var(--accent-secondary);
            margin-bottom: 20px;
        }

        .promo-tag {
            background: linear-gradient(135deg, rgba(204, 255, 0, 0.2), rgba(0, 240, 255, 0.15));
            color: var(--accent-primary);
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 30px;
            display: inline-block;
            font-size: 0.8rem;
            margin-bottom: 15px;
            border: 1px solid rgba(204, 255, 0, 0.3);
        }

        .promo-card h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        /* Comparison Table */
        .compare-table {
            background: transparent;
            border-collapse: separate;
            border-spacing: 0 10px;
            width: 100%;
        }

        .compare-table thead th {
            background: var(--bg-card);
            color: var(--accent-secondary);
            padding: 16px 15px;
            font-weight: 700;
            border: none;
            text-align: center;
        }

        .compare-table tbody td {
            background: var(--bg-card);
            color: var(--text-primary);
            padding: 16px 15px;
            text-align: center;
            border: 1px solid rgba(0, 240, 255, 0.1);
            vertical-align: middle;
        }

        .compare-table tbody tr:hover td {
            border-color: var(--accent-secondary);
            background: rgba(22, 18, 43, 0.9);
        }

        .badge-hot {
            background: #D32F2F;
            color: #fff;
            padding: 4px 12px;
            border-radius: 30px;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
        }

        /* FAQ */
        .faq-list .accordion-item {
            background: var(--bg-card);
            border: 1px solid rgba(0, 240, 255, 0.15);
            margin-bottom: 15px;
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        .faq-list .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-weight: 700;
            box-shadow: none;
            padding: 20px 25px;
            font-size: 1.05rem;
        }

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

        .faq-list .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-secondary);
        }

        .faq-list .accordion-body {
            color: var(--text-secondary);
            padding: 0 25px 20px;
            line-height: 1.7;
        }

        /* CTA Section */
        .cta-section {
            background: radial-gradient(circle at 30% 70%, rgba(204, 255, 0, 0.06) 0%, transparent 60%);
            padding: 70px 0;
        }

        .cta-box {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 50px 30px;
            border: 1px solid var(--border-glow);
            text-align: center;
        }

        /* Footer */
        footer {
            background: var(--bg-secondary);
            padding: 25px 0;
            border-top: 1px solid rgba(0, 240, 255, 0.2);
        }

        footer p {
            margin: 0;
        }

        footer .small {
            color: var(--text-secondary);
            font-size: 0.85rem;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .hero-section {
                padding: 120px 0 50px;
            }

            .hero-img-wrapper {
                margin-top: 30px;
            }

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

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

            .compare-table {
                font-size: 0.85rem;
            }
        }

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

            .hero-value-item {
                flex-direction: column;
                align-items: flex-start;
            }

            .btn-cta {
                width: 100%;
                text-align: center;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0F0C20;
            --bg-secondary: #0B1A30;
            --bg-card: #16122B;
            --accent-primary: #CCFF00;
            --accent-secondary: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --border-glow: rgba(0, 240, 255, 0.25);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-lime: 0 0 12px rgba(204, 255, 0, 0.4);
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        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;
            margin: 0;
            padding: 0;
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        h1, h2, h3, h4, .navbar-brand, .btn {
            font-family: var(--font-heading);
        }

        h1 {
            font-weight: 900;
            font-size: 2.8rem;
            color: var(--text-primary);
            line-height: 1.2;
        }

        h2 {
            font-weight: 700;
            font-size: 2rem;
            color: var(--accent-secondary);
        }

        h3 {
            font-weight: 700;
            font-size: 1.5rem;
            color: var(--text-primary);
        }

        .section-title {
            color: var(--accent-secondary);
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 2.5rem;
            font-size: 2rem;
        }

        .section-title i {
            font-size: 1.8rem;
            color: var(--accent-primary);
        }

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

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

        a {
            color: var(--accent-secondary);
            text-decoration: none;
            transition: var(--transition-base);
        }

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

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

        /* Navbar */
        .navbar {
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.18);
            padding: 10px 0;
            transition: var(--transition-base);
            z-index: 1000;
        }

        .navbar-brand {
            font-weight: 800;
            font-size: 1.6rem;
            color: var(--accent-primary) !important;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .navbar-brand i {
            color: var(--accent-secondary);
            font-size: 1.8rem;
        }

        .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 600;
            margin: 0 6px;
            padding: 8px 16px !important;
            border-radius: 30px;
            transition: var(--transition-base);
            font-size: 0.95rem;
        }

        .nav-link:hover, .nav-link.active {
            color: #FFFFFF !important;
            background: rgba(0, 240, 255, 0.12);
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.7);
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-secondary);
            color: var(--accent-secondary);
            border-radius: 30px;
            padding: 8px 22px;
            font-weight: 700;
            transition: var(--transition-base);
        }

        .btn-login:hover {
            background: rgba(0, 240, 255, 0.15);
            color: #fff;
            border-color: #fff;
        }

        .btn-signup {
            background: var(--accent-primary);
            border: none;
            color: #0F0C20;
            border-radius: 30px;
            padding: 10px 24px;
            font-weight: 800;
            transition: var(--transition-base);
            box-shadow: var(--shadow-lime);
        }

        .btn-signup:hover {
            background: #e0ff4d;
            color: #000;
            transform: translateY(-2px);
            box-shadow: 0 0 18px rgba(204, 255, 0, 0.7);
        }

        /* Hero Section */
        .hero-section {
            padding: 140px 0 80px;
            background: radial-gradient(circle at 20% 30%, rgba(0, 240, 255, 0.08) 0%, transparent 50%);
            position: relative;
        }

        .hero-section h1 {
            margin-bottom: 20px;
        }

        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 650px;
            margin: 25px 0 35px;
            line-height: 1.7;
        }

        .btn-cta {
            background: var(--accent-primary);
            color: #0F0C20;
            font-weight: 800;
            padding: 14px 34px;
            border-radius: 40px;
            font-size: 1.1rem;
            border: none;
            transition: var(--transition-base);
            box-shadow: var(--shadow-lime);
            text-transform: uppercase;
            letter-spacing: 0.6px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-cta:hover {
            background: #fff;
            color: #000;
            transform: scale(1.05);
        }

        .hero-visual {
            background: rgba(22, 18, 43, 0.7);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: var(--radius-lg);
            padding: 30px;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .hero-visual img {
            border-radius: var(--radius-md);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
        }

        .download-badges {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        .download-badge {
            background: var(--bg-card);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-md);
            padding: 12px 20px;
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
            color: var(--text-primary);
            transition: var(--transition-base);
            cursor: pointer;
        }

        .download-badge i {
            font-size: 1.8rem;
            color: var(--accent-secondary);
        }

        .download-badge:hover {
            border-color: var(--accent-primary);
            box-shadow: var(--shadow-neon);
            color: var(--accent-primary);
        }

        /* Sections General */
        section {
            padding: 70px 0;
        }

        .bg-dark-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px;
            border: 1px solid rgba(0, 240, 255, 0.12);
            transition: var(--transition-base);
            height: 100%;
        }

        .bg-dark-card:hover {
            border-color: var(--accent-secondary);
            box-shadow: 0 10px 28px rgba(0, 0, 0, 0.6);
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .feature-item {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 30px;
            border: 1px solid rgba(0, 240, 255, 0.1);
            transition: var(--transition-base);
        }

        .feature-item i {
            font-size: 2.5rem;
            color: var(--accent-secondary);
            margin-bottom: 15px;
        }

        .feature-item h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
        }

        .feature-item p {
            color: var(--text-secondary);
            margin: 0;
        }

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

        .steps-timeline {
            display: flex;
            flex-direction: column;
            gap: 40px;
        }

        .step-row {
            display: flex;
            align-items: center;
            gap: 30px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 30px;
            border: 1px solid rgba(0, 240, 255, 0.15);
            transition: var(--transition-base);
        }

        .step-row:hover {
            border-color: var(--accent-secondary);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
        }

        .step-number {
            font-size: 3rem;
            font-weight: 900;
            color: var(--accent-primary);
            min-width: 70px;
            text-align: center;
            line-height: 1;
        }

        .step-content h3 {
            color: var(--accent-secondary);
            margin-bottom: 8px;
        }

        .step-content p {
            color: var(--text-secondary);
            margin: 0;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 25px;
            border: 1px solid rgba(0, 240, 255, 0.12);
            transition: var(--transition-base);
        }

        .faq-item h3 {
            color: var(--accent-secondary);
            margin-bottom: 10px;
            font-size: 1.2rem;
        }

        .faq-item p {
            color: var(--text-secondary);
            margin: 0;
        }

        .faq-item:hover {
            border-color: var(--accent-primary);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
        }

        .cta-section {
            background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-card) 100%);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            border: 1px solid rgba(204, 255, 0, 0.3);
            text-align: center;
        }

        .cta-section h2 {
            color: var(--accent-primary);
            margin-bottom: 20px;
        }

        .cta-section p {
            color: var(--text-secondary);
            max-width: 700px;
            margin: 0 auto 30px;
            font-size: 1.1rem;
        }

        footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            padding: 30px 0;
            color: var(--text-secondary);
        }

        footer strong {
            color: var(--accent-primary);
        }

        footer .small {
            font-size: 0.85rem;
        }

        footer .text-muted {
            color: #6c757d !important;
        }

        /* Left FAB */
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 100px;
            z-index: 999;
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            border-radius: 50px;
            width: 55px;
            height: 55px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            transition: var(--transition-base);
            cursor: pointer;
            animation: floatFAB 3s ease-in-out infinite;
        }

        .fab-left::before {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            background: linear-gradient(45deg, #00F0FF, #CCFF00);
            border-radius: 50px;
            z-index: -1;
            opacity: 0.6;
        }

        .fab-left i {
            font-size: 1.6rem;
            color: var(--accent-secondary);
        }

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

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

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-section {
                padding: 120px 0 60px;
            }
            h1 {
                font-size: 2.2rem;
            }
            .step-row {
                flex-direction: column;
                text-align: center;
            }
            .step-number {
                min-width: auto;
            }
        }

        @media (max-width: 768px) {
            .navbar-collapse {
                background: rgba(15, 12, 32, 0.95);
                border-radius: 15px;
                padding: 15px;
                margin-top: 10px;
            }
            .hero-section {
                padding: 100px 0 40px;
            }
            h1 {
                font-size: 1.8rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .cta-section {
                padding: 40px 20px;
            }
        }

        @media (max-width: 520px) {
            .download-badges {
                flex-direction: column;
            }
            .fab-left {
                width: 48px;
                height: 48px;
                left: 15px;
                bottom: 90px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #0F0C20;
            --bg-secondary: #0B1A30;
            --bg-card: #16122B;
            --accent-primary: #CCFF00;
            --accent-secondary: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --border-glow: rgba(0, 240, 255, 0.25);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-lime: 0 0 12px rgba(204, 255, 0, 0.4);
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        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;
        }
        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }
        h1, h2, h3, h4, .navbar-brand, .btn {
            font-family: var(--font-heading);
        }
        .section-title {
            color: var(--accent-secondary);
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 2.5rem;
        }
        .section-title i {
            font-size: 1.8rem;
            color: var(--accent-primary);
        }
        .text-accent {
            color: var(--accent-primary);
        }
        .text-cyan {
            color: var(--accent-secondary);
        }
        .navbar {
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.18);
            padding: 10px 0;
            transition: var(--transition-base);
            z-index: 1000;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.6rem;
            color: var(--accent-primary) !important;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .navbar-brand i {
            color: var(--accent-secondary);
            font-size: 1.8rem;
        }
        .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 600;
            margin: 0 6px;
            padding: 8px 16px !important;
            border-radius: 30px;
            transition: var(--transition-base);
            font-size: 0.95rem;
        }
        .nav-link:hover, .nav-link.active {
            color: #FFFFFF !important;
            background: rgba(0, 240, 255, 0.12);
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.7);
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-secondary);
            color: var(--accent-secondary);
            border-radius: 30px;
            padding: 8px 22px;
            font-weight: 700;
            transition: var(--transition-base);
        }
        .btn-login:hover {
            background: rgba(0, 240, 255, 0.15);
            color: #fff;
            border-color: #fff;
        }
        .btn-signup {
            background: var(--accent-primary);
            border: none;
            color: #0F0C20;
            border-radius: 30px;
            padding: 10px 24px;
            font-weight: 800;
            transition: var(--transition-base);
            box-shadow: var(--shadow-lime);
        }
        .btn-signup:hover {
            background: #e0ff4d;
            color: #000;
            transform: translateY(-2px);
            box-shadow: 0 0 18px rgba(204, 255, 0, 0.7);
        }
        .hero-section {
            padding: 140px 0 80px;
            background: radial-gradient(circle at 20% 30%, rgba(0, 240, 255, 0.08) 0%, transparent 50%);
            position: relative;
        }
        .hero-icon-item {
            background: rgba(22, 18, 43, 0.8);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: var(--transition-base);
            flex: 1 1 auto;
            min-width: 130px;
        }
        .hero-icon-item i {
            font-size: 2.2rem;
            color: var(--accent-secondary);
        }
        .btn-cta {
            background: var(--accent-primary);
            color: #0F0C20;
            font-weight: 800;
            padding: 14px 34px;
            border-radius: 40px;
            font-size: 1.1rem;
            border: none;
            transition: var(--transition-base);
            box-shadow: var(--shadow-lime);
            text-transform: uppercase;
            letter-spacing: 0.6px;
        }
        .btn-cta:hover {
            background: #fff;
            color: #000;
            transform: scale(1.05);
        }
        section {
            padding: 70px 0;
        }
        .bg-dark-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px;
            border: 1px solid rgba(0, 240, 255, 0.12);
            transition: var(--transition-base);
            height: 100%;
        }
        .bg-dark-card:hover {
            border-color: var(--accent-secondary);
            box-shadow: 0 10px 28px rgba(0, 0, 0, 0.6);
        }
        .progress-ring-container {
            position: relative;
            width: 200px;
            height: 200px;
            margin: 0 auto 25px;
        }
        .progress-ring-bg {
            fill: none;
            stroke: rgba(0, 240, 255, 0.15);
            stroke-width: 12;
        }
        .progress-ring-fill {
            fill: none;
            stroke: var(--accent-primary);
            stroke-width: 12;
            stroke-linecap: round;
            transform-origin: center;
            transform: rotate(-90deg);
            transition: stroke-dashoffset 1.2s ease-in-out;
        }
        .progress-ring-text {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            text-align: center;
        }
        .progress-ring-text .percent {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--accent-primary);
            line-height: 1;
        }
        .progress-ring-text .label {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .funding-tier {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid rgba(0, 240, 255, 0.1);
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
            height: 100%;
        }
        .funding-tier:hover {
            border-color: var(--accent-secondary);
        }
        .funding-tier .tier-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            background: var(--accent-primary);
            color: #0F0C20;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
        }
        .funding-tier .tier-title {
            color: var(--accent-secondary);
            font-weight: 700;
            margin-bottom: 10px;
        }
        .funding-tier .tier-price {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-primary);
        }
        .funding-tier ul {
            list-style: none;
            padding: 0;
            margin: 16px 0 0;
            color: var(--text-secondary);
        }
        .funding-tier ul li {
            padding: 4px 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .funding-tier ul li i {
            color: var(--accent-primary);
            font-size: 0.8rem;
        }
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }
        .tips-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 30px;
            border: 1px solid rgba(0, 240, 255, 0.1);
            transition: var(--transition-base);
        }
        .tips-card:hover {
            border-color: var(--accent-secondary);
            box-shadow: var(--shadow-neon);
        }
        .tips-card .icon-circle {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 1.8rem;
            color: var(--accent-secondary);
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            border: 1px solid rgba(0, 240, 255, 0.1);
            overflow: hidden;
        }
        .faq-question {
            padding: 20px 24px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 700;
            color: var(--text-primary);
            transition: var(--transition-base);
        }
        .faq-question:hover {
            color: var(--accent-secondary);
        }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-question i {
            transition: transform 0.3s ease;
            color: var(--accent-secondary);
        }
        .comparison-table {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 32px;
            border: 1px solid rgba(0, 240, 255, 0.12);
        }
        .comparison-table table {
            color: var(--text-primary);
            width: 100%;
        }
        .comparison-table th {
            color: var(--accent-secondary);
            border-bottom: 2px solid rgba(0, 240, 255, 0.3);
            padding: 14px 16px;
        }
        .comparison-table td {
            padding: 14px 16px;
            border-bottom: 1px solid rgba(0, 240, 255, 0.08);
            color: var(--text-secondary);
        }
        .comparison-table td:first-child {
            font-weight: 600;
            color: var(--text-primary);
        }
        .comparison-table .highlight-td {
            color: var(--accent-primary);
            font-weight: 600;
        }
        footer {
            background: var(--bg-secondary);
            padding: 35px 0;
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            color: var(--text-secondary);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 120px 0 50px;
                text-align: center;
            }
            .navbar-collapse {
                background: rgba(10, 9, 24, 0.98);
                padding: 20px;
                border-radius: 16px;
                margin-top: 12px;
            }
        }