/* roulang page: index */
:root {
            --primary-bg: #0B0B0B;
            --secondary-bg: #121212;
            --accent-orange: #FF4500;
            --accent-fire: #FF0000;
            --text-white: #FFFFFF;
            --text-warm-gray: #CCCCCC;
            --border-dark: #2A2A2A;
            --card-bg: #1A1A1A;
            --card-hover: #242424;
            --font-main: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --shadow-glow: 0 8px 24px rgba(255, 69, 0, 0.15);
            --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.4);
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 6px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            background-color: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: var(--text-white);
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--accent-orange);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, .btn {
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }
        /* Header & Navigation */
        .site-header {
            background: rgba(11, 11, 11, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-dark);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 12px 0;
        }
        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }
        .navbar-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .navbar-brand i {
            color: var(--accent-orange);
            font-size: 1.6rem;
        }
        .navbar-links {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }
        .nav-link-custom {
            color: var(--text-warm-gray);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 14px;
            border-radius: 20px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }
        .nav-link-custom:hover,
        .nav-link-custom.active {
            color: var(--text-white);
            background: rgba(255, 69, 0, 0.15);
        }
        .navbar-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .btn-login-text {
            background: none;
            border: none;
            color: var(--text-warm-gray);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 8px 14px;
            border-radius: 20px;
        }
        .btn-login-text:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.05);
        }
        .btn-signup-solid {
            background: linear-gradient(135deg, #FF4500, #FF0000);
            border: none;
            color: var(--text-white);
            font-weight: 700;
            font-size: 0.95rem;
            padding: 10px 22px;
            border-radius: 24px;
            box-shadow: 0 4px 14px rgba(255, 69, 0, 0.35);
        }
        .btn-signup-solid:hover {
            background: linear-gradient(135deg, #FF5515, #FF1A1A);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 69, 0, 0.5);
            color: var(--text-white);
        }
        .navbar-toggle-mobile {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.5rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .navbar-toggle-mobile {
                display: block;
            }
            .navbar-links {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                background: rgba(11, 11, 11, 0.98);
                border-radius: var(--radius-md);
                padding: var(--spacing-sm);
                margin-top: 10px;
            }
            .navbar-links.open {
                display: flex;
            }
            .nav-link-custom {
                text-align: left;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }
            .navbar-actions {
                gap: 6px;
            }
            .btn-signup-solid {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
            .btn-login-text {
                font-size: 0.85rem;
                padding: 8px 10px;
            }
        }
        /* Hero Section */
        .hero-section {
            background-image: linear-gradient(rgba(11, 11, 11, 0.7), rgba(11, 11, 11, 0.7)), url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: var(--spacing-xl) 0;
            border-bottom: 1px solid var(--border-dark);
            position: relative;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, #FF4500, #FF0000, #FF4500);
        }
        .hero-content {
            max-width: 800px;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255, 69, 0, 0.15);
            border: 1px solid rgba(255, 69, 0, 0.4);
            color: var(--accent-orange);
            font-weight: 600;
            font-size: 0.85rem;
            padding: 6px 16px;
            border-radius: 20px;
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.5px;
        }
        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: var(--spacing-md);
            color: var(--text-white);
        }
        .hero-description {
            font-size: 1.1rem;
            color: var(--text-warm-gray);
            margin-bottom: var(--spacing-lg);
            line-height: 1.7;
            max-width: 650px;
        }
        .hero-cta-group {
            display: flex;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
            align-items: center;
        }
        .btn-primary-custom {
            background: linear-gradient(135deg, #FF4500, #FF0000);
            border: none;
            color: var(--text-white);
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: 28px;
            box-shadow: 0 6px 20px rgba(255, 69, 0, 0.4);
            transition: all 0.3s ease;
        }
        .btn-primary-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 28px rgba(255, 69, 0, 0.55);
            color: var(--text-white);
            background: linear-gradient(135deg, #FF5515, #FF1A1A);
        }
        .btn-outline-custom {
            background: transparent;
            border: 1.5px solid var(--text-warm-gray);
            color: var(--text-white);
            font-weight: 600;
            font-size: 1rem;
            padding: 13px 30px;
            border-radius: 28px;
            transition: all 0.3s ease;
        }
        .btn-outline-custom:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
            background: rgba(255, 69, 0, 0.08);
        }
        .hero-stats {
            display: flex;
            gap: var(--spacing-lg);
            margin-top: var(--spacing-lg);
            flex-wrap: wrap;
        }
        .hero-stat {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .hero-stat-icon {
            width: 44px;
            height: 44px;
            background: rgba(255, 69, 0, 0.15);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-orange);
            font-size: 1.2rem;
        }
        .hero-stat-text strong {
            font-size: 1.2rem;
            display: block;
            color: var(--text-white);
        }
        .hero-stat-text span {
            font-size: 0.85rem;
            color: var(--text-warm-gray);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-description {
                font-size: 1rem;
            }
            .hero-section {
                padding: var(--spacing-lg) 0;
            }
            .hero-stats {
                gap: var(--spacing-sm);
            }
        }
        /* General Section Styles */
        .section-block {
            padding: var(--spacing-xl) 0;
            border-bottom: 1px solid var(--border-dark);
        }
        .section-block:nth-child(even) {
            background: var(--secondary-bg);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: var(--spacing-sm);
            color: var(--text-white);
            position: relative;
            padding-bottom: 12px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, #FF4500, #FF0000);
            border-radius: 2px;
        }
        .section-subtitle {
            color: var(--text-warm-gray);
            font-size: 1rem;
            max-width: 700px;
            margin-bottom: var(--spacing-lg);
            line-height: 1.7;
        }
        .text-accent {
            color: var(--accent-orange);
        }
        /* Feature Cards */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--spacing-md);
        }
        .feature-item {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .feature-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(180deg, #FF4500, #FF0000);
            border-radius: 2px 0 0 2px;
        }
        .feature-item:hover {
            background: var(--card-hover);
            border-color: rgba(255, 69, 0, 0.5);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            background: rgba(255, 69, 0, 0.12);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-orange);
            font-size: 1.5rem;
            margin-bottom: var(--spacing-sm);
        }
        .feature-item h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: var(--spacing-xs);
            color: var(--text-white);
        }
        .feature-item p {
            color: var(--text-warm-gray);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 0;
        }
        /* Step Process */
        .steps-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: var(--spacing-md);
        }
        .step-item {
            display: flex;
            gap: var(--spacing-sm);
            align-items: flex-start;
        }
        .step-number {
            min-width: 48px;
            height: 48px;
            background: linear-gradient(135deg, #FF4500, #FF0000);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--text-white);
            flex-shrink: 0;
        }
        .step-content h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--text-white);
        }
        .step-content p {
            color: var(--text-warm-gray);
            font-size: 0.9rem;
            line-height: 1.6;
            margin-bottom: 0;
        }
        /* Changelog */
        .changelog-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .changelog-item {
            display: flex;
            gap: var(--spacing-sm);
            padding: var(--spacing-sm);
            background: var(--card-bg);
            border-radius: var(--radius-sm);
            border-left: 3px solid var(--accent-orange);
            transition: all 0.3s ease;
        }
        .changelog-item:hover {
            background: var(--card-hover);
        }
        .changelog-badge {
            background: rgba(255, 69, 0, 0.15);
            color: var(--accent-orange);
            font-weight: 700;
            font-size: 0.8rem;
            padding: 4px 12px;
            border-radius: 12px;
            white-space: nowrap;
            height: fit-content;
            flex-shrink: 0;
        }
        .changelog-item p {
            margin-bottom: 0;
            color: var(--text-warm-gray);
            font-size: 0.95rem;
            line-height: 1.6;
        }
        /* FAQ */
        .accordion-custom .accordion-item {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-sm);
            margin-bottom: var(--spacing-sm);
            overflow: hidden;
        }
        .accordion-custom .accordion-button {
            background: var(--card-bg);
            color: var(--text-white);
            font-weight: 600;
            padding: var(--spacing-sm) var(--spacing-md);
            border: none;
            box-shadow: none;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--card-hover);
            color: var(--accent-orange);
        }
        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            border-color: rgba(255, 69, 0, 0.5);
        }
        .accordion-custom .accordion-body {
            background: var(--card-bg);
            color: var(--text-warm-gray);
            padding: var(--spacing-sm) var(--spacing-md);
            line-height: 1.7;
        }
        .accordion-custom .accordion-button::after {
            filter: invert(1);
        }
        /* CTA Form */
        .cta-form-section {
            background: linear-gradient(135deg, #1A0A00, #0B0B0B);
            border: 1px solid rgba(255, 69, 0, 0.3);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            margin: var(--spacing-lg) 0;
            position: relative;
            overflow: hidden;
        }
        .cta-form-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255, 69, 0, 0.15), transparent 70%);
            border-radius: 50%;
        }
        .cta-form-content h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: var(--spacing-xs);
            color: var(--text-white);
        }
        .cta-form-content p {
            color: var(--text-warm-gray);
            margin-bottom: var(--spacing-md);
            line-height: 1.7;
        }
        .form-control-custom {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-sm);
            padding: 12px 18px;
            color: var(--text-white);
            width: 100%;
            transition: all 0.3s ease;
        }
        .form-control-custom::placeholder {
            color: #666;
        }
        .form-control-custom:focus {
            outline: none;
            border-color: var(--accent-orange);
            background: rgba(255, 69, 0, 0.08);
            box-shadow: 0 0 0 3px rgba(255, 69, 0, 0.15);
        }
        /* News List */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-xs);
        }
        .news-item {
            display: flex;
            gap: var(--spacing-sm);
            align-items: center;
            padding: var(--spacing-sm);
            border-radius: var(--radius-sm);
            transition: all 0.3s ease;
            border-bottom: 1px solid var(--border-dark);
        }
        .news-item:hover {
            background: var(--card-bg);
            padding-left: var(--spacing-md);
        }
        .news-item-icon {
            width: 36px;
            height: 36px;
            background: rgba(255, 69, 0, 0.12);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-orange);
            flex-shrink: 0;
        }
        .news-item-content {
            flex: 1;
        }
        .news-item-content a {
            font-weight: 600;
            color: var(--text-white);
            font-size: 0.95rem;
            line-height: 1.4;
            display: block;
        }
        .news-item-content a:hover {
            color: var(--accent-orange);
        }
        .news-item-content span {
            color: #777;
            font-size: 0.8rem;
        }
        /* Footer */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-dark);
            padding: var(--spacing-lg) 0;
            margin-top: var(--spacing-lg);
        }
        .footer-content {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
            text-align: center;
        }
        .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        .footer-brand i {
            color: var(--accent-orange);
            font-size: 1.5rem;
        }
        .footer-text {
            color: #777;
            font-size: 0.85rem;
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .footer-badges {
            display: flex;
            gap: var(--spacing-sm);
            justify-content: center;
            flex-wrap: wrap;
        }
        .footer-badge {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-dark);
            color: var(--text-warm-gray);
            padding: 6px 16px;
            border-radius: 16px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .footer-badge.highlight {
            border-color: rgba(255, 69, 0, 0.5);
            color: var(--accent-orange);
        }
        .footer-copyright {
            color: #555;
            font-size: 0.8rem;
            border-top: 1px solid var(--border-dark);
            padding-top: var(--spacing-sm);
            margin-top: var(--spacing-sm);
        }
        /* FAB */
        .fab-custom {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 999;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, #FF4500, #FF0000);
            border: 2px solid #FF4500;
            color: var(--text-white);
            font-size: 1.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 20px rgba(255, 69, 0, 0.6);
            opacity: 0.7;
            transition: all 0.3s ease;
            animation: fabBreathe 2.5s infinite;
            cursor: pointer;
        }
        .fab-custom:hover {
            opacity: 1;
            transform: scale(1.15);
            box-shadow: 0 0 30px rgba(255, 69, 0, 0.9);
        }
        .fab-custom:active {
            transform: scale(0.9);
        }
        @keyframes fabBreathe {
            0%, 100% {
                box-shadow: 0 0 20px rgba(255, 69, 0, 0.6);
            }
            50% {
                box-shadow: 0 0 30px rgba(255, 69, 0, 0.8);
            }
        }
        .fab-notification {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 14px;
            height: 14px;
            background: #FFD700;
            border-radius: 50%;
            border: 2px solid var(--primary-bg);
            animation: blinkDot 1.5s infinite;
        }
        @keyframes blinkDot {
            0%, 100% {
                opacity: 1;
            }
            50% {
                opacity: 0.3;
            }
        }
        /* Responsive adjustments */
        @media (max-width: 520px) {
            .section-title {
                font-size: 1.6rem;
            }
            .hero-title {
                font-size: 1.8rem;
            }
            .feature-grid,
            .steps-container {
                grid-template-columns: 1fr;
            }
            .cta-form-section {
                padding: var(--spacing-md);
            }
            .btn-primary-custom,
            .btn-outline-custom {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .fab-custom {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 12px;
                bottom: 80px;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #0A2E1C;
            --bg-secondary: #0F3D26;
            --bg-card: #123E25;
            --bg-card-hover: #164A2D;
            --accent-gold: #FFD700;
            --accent-gold-dark: #DAA520;
            --accent-red: #D32F2F;
            --accent-red-hover: #B71C1C;
            --text-primary: #FFFFFF;
            --text-secondary: #D1F2EB;
            --text-muted: #9AB8AD;
            --border-gold: rgba(255, 215, 0, 0.35);
            --border-subtle: rgba(209, 242, 235, 0.12);
            --shadow-gold: 0 8px 32px rgba(255, 215, 0, 0.12);
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            overflow-x: hidden;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

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

        button {
            transition: var(--transition-base);
            cursor: pointer;
            font-family: var(--font-family);
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-wide {
            width: 100%;
            max-width: 1440px;
            margin: 0 auto;
            padding: 0 32px;
        }

        .site-main {
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        /* Header / Navigation */
        .site-header {
            background: rgba(10, 46, 28, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
            background: rgba(10, 46, 28, 0.98);
        }

        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            gap: 20px;
            min-height: 72px;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--accent-gold);
            letter-spacing: -0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .navbar-brand i {
            font-size: 1.6rem;
            color: var(--accent-gold);
            filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.5));
        }

        .navbar-brand:hover {
            color: var(--accent-gold-dark);
        }

        .navbar-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
        }

        .nav-link-custom {
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 10px 16px;
            border-radius: 50px;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .nav-link-custom:hover {
            color: var(--accent-gold);
            background: rgba(255, 215, 0, 0.08);
        }

        .nav-link-custom.active {
            color: var(--accent-gold);
            background: rgba(255, 215, 0, 0.12);
            font-weight: 600;
        }

        .navbar-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .btn-login-text {
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 10px 16px;
            border-radius: 50px;
            transition: var(--transition-base);
        }

        .btn-login-text:hover {
            color: var(--accent-gold);
            background: rgba(255, 255, 255, 0.06);
        }

        .btn-signup-solid {
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-dark));
            border: none;
            color: var(--bg-primary);
            font-weight: 700;
            font-size: 0.95rem;
            padding: 10px 22px;
            border-radius: 50px;
            box-shadow: 0 4px 16px rgba(255, 215, 0, 0.3);
            transition: var(--transition-base);
        }

        .btn-signup-solid:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 215, 0, 0.4);
            background: linear-gradient(135deg, #FFE14D, #FFD700);
        }

        .btn-signup-solid:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(255, 215, 0, 0.3);
        }

        .navbar-toggle-mobile {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            padding: 8px;
            transition: var(--transition-base);
        }

        .navbar-toggle-mobile:hover {
            color: var(--accent-gold);
        }

        /* Article Hero */
        .article-hero {
            position: relative;
            background: var(--bg-secondary);
            padding: 60px 0 40px;
            border-bottom: 1px solid var(--border-subtle);
            overflow: hidden;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(255, 215, 0, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .article-hero::after {
            content: '';
            position: absolute;
            bottom: -160px;
            left: -100px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(211, 47, 47, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .article-hero-content {
            position: relative;
            z-index: 2;
            max-width: 860px;
        }

        .article-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 215, 0, 0.12);
            color: var(--accent-gold);
            font-weight: 600;
            font-size: 0.85rem;
            padding: 8px 18px;
            border-radius: 50px;
            border: 1px solid var(--border-gold);
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .article-hero h1 {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 20px;
            color: var(--text-muted);
            font-size: 0.9rem;
        }

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

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

        /* Article Content Layout */
        .article-layout {
            padding: 48px 0 60px;
            flex: 1;
        }

        .article-layout-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            align-items: start;
        }

        .article-main-content {
            min-width: 0;
        }

        .article-cover-wrapper {
            position: relative;
            margin-bottom: 32px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

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

        .article-cover-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to bottom, transparent 50%, rgba(10, 46, 28, 0.4));
            pointer-events: none;
        }

        .article-prose {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        .article-prose h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-top: 40px;
            margin-bottom: 16px;
            letter-spacing: -0.01em;
            line-height: 1.35;
        }

        .article-prose h3 {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-top: 28px;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .article-prose p {
            margin-bottom: 18px;
        }

        .article-prose ul,
        .article-prose ol {
            margin-bottom: 18px;
            padding-left: 24px;
        }

        .article-prose li {
            margin-bottom: 8px;
        }

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

        .article-prose blockquote {
            background: var(--bg-card);
            border-left: 4px solid var(--accent-gold);
            padding: 20px 24px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 24px 0;
            font-style: italic;
            color: var(--text-secondary);
        }

        .article-prose img {
            border-radius: var(--radius-md);
            margin: 24px 0;
        }

        .article-cta-inline {
            background: linear-gradient(135deg, rgba(255, 215, 0, 0.1), rgba(255, 215, 0, 0.04));
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            margin: 32px 0;
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .article-cta-inline-text {
            flex: 1;
            min-width: 200px;
        }

        .article-cta-inline-text h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--accent-gold);
            margin-bottom: 4px;
        }

        .article-cta-inline-text p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        .btn-gold-solid {
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-dark));
            border: none;
            color: var(--bg-primary);
            font-weight: 700;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: 50px;
            box-shadow: 0 4px 16px rgba(255, 215, 0, 0.3);
            transition: var(--transition-base);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-gold-solid:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 215, 0, 0.4);
            color: var(--bg-primary);
        }

        .btn-outline-gold {
            background: transparent;
            border: 2px solid var(--border-gold);
            color: var(--accent-gold);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 10px 24px;
            border-radius: 50px;
            transition: var(--transition-base);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-outline-gold:hover {
            background: rgba(255, 215, 0, 0.1);
            color: var(--accent-gold);
            border-color: var(--accent-gold);
        }

        /* Sidebar */
        .article-sidebar {
            position: sticky;
            top: 100px;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border-subtle);
        }

        .sidebar-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--accent-gold);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card h3 i {
            font-size: 1rem;
        }

        .sidebar-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        .sidebar-list li:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .sidebar-list li i {
            color: var(--accent-gold);
            font-size: 0.8rem;
            flex-shrink: 0;
        }

        .sidebar-tip-box {
            background: rgba(211, 47, 47, 0.08);
            border: 1px solid rgba(211, 47, 47, 0.25);
            border-radius: var(--radius-sm);
            padding: 14px 16px;
            font-size: 0.85rem;
            color: #F8D7DA;
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

        .sidebar-tip-box i {
            color: var(--accent-red);
            margin-top: 3px;
        }

        /* Article not found */
        .article-not-found {
            text-align: center;
            padding: 80px 20px;
            max-width: 600px;
            margin: 0 auto;
        }

        .article-not-found i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .article-not-found h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 48px 0 32px;
            margin-top: auto;
        }

        .footer-content {
            max-width: 800px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--accent-gold);
            margin-bottom: 16px;
            line-height: 1.4;
        }

        .footer-brand i {
            font-size: 1.4rem;
            flex-shrink: 0;
        }

        .footer-text {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 20px;
            line-height: 1.7;
        }

        .footer-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 24px;
        }

        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-subtle);
            padding: 8px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .footer-badge.highlight {
            border-color: var(--border-gold);
            background: rgba(255, 215, 0, 0.08);
            color: var(--accent-gold);
        }

        .footer-badge i {
            font-size: 0.85rem;
        }

        .footer-copyright {
            color: var(--text-muted);
            font-size: 0.85rem;
            border-top: 1px solid var(--border-subtle);
            padding-top: 20px;
            line-height: 1.6;
        }

        /* FAB */
        .fab-floating {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1080;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, #1A1A1A, #0A0A0A);
            border: 2px solid var(--accent-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 1.3rem;
            cursor: pointer;
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            transition: var(--transition-base);
            opacity: 0.7;
            animation: fab-float 3s ease-in-out infinite;
        }

        .fab-floating:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 8px 32px rgba(255, 215, 0, 0.45);
            animation-play-state: paused;
        }

        .fab-floating:active {
            transform: scale(0.95) translateY(2px);
        }

        .fab-notification {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 14px;
            height: 14px;
            background: var(--accent-red);
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: fab-blink 1.5s ease-in-out infinite;
        }

        @keyframes fab-float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .article-layout-grid {
                grid-template-columns: 1fr 280px;
                gap: 28px;
            }

            .article-hero h1 {
                font-size: 2.1rem;
            }
        }

        @media (max-width: 768px) {
            .navbar-custom {
                flex-wrap: wrap;
                padding: 12px 0;
                gap: 12px;
            }

            .navbar-toggle-mobile {
                display: block;
                order: 3;
            }

            .navbar-links {
                display: none;
                width: 100%;
                order: 4;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding-top: 8px;
                border-top: 1px solid var(--border-subtle);
            }

            .navbar-links.show {
                display: flex;
            }

            .nav-link-custom {
                padding: 12px 16px;
                text-align: left;
            }

            .navbar-actions {
                margin-left: auto;
                order: 2;
            }

            .navbar-brand {
                order: 1;
                font-size: 1.05rem;
            }

            .navbar-toggle-mobile {
                order: 3;
            }

            .article-hero {
                padding: 40px 0 28px;
            }

            .article-hero h1 {
                font-size: 1.7rem;
            }

            .article-layout {
                padding: 32px 0 40px;
            }

            .article-layout-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .article-sidebar {
                position: static;
            }

            .article-prose {
                font-size: 1rem;
            }

            .article-prose h2 {
                font-size: 1.4rem;
            }

            .article-prose h3 {
                font-size: 1.15rem;
            }

            .btn-signup-solid {
                padding: 10px 16px;
                font-size: 0.85rem;
            }

            .btn-login-text {
                padding: 10px 12px;
                font-size: 0.85rem;
            }

            .fab-floating {
                width: 48px;
                height: 48px;
                font-size: 1.1rem;
                left: 12px;
                bottom: 80px;
            }

            .container {
                padding: 0 16px;
            }

            .container-wide {
                padding: 0 16px;
            }
        }

        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 1.4rem;
            }

            .article-meta {
                gap: 10px;
                font-size: 0.8rem;
            }

            .article-cta-inline {
                flex-direction: column;
                align-items: flex-start;
                gap: 14px;
                padding: 18px 20px;
            }

            .btn-gold-solid,
            .btn-outline-gold {
                width: 100%;
                justify-content: center;
                font-size: 0.9rem;
                padding: 10px 20px;
            }

            .navbar-brand {
                font-size: 0.95rem;
                gap: 6px;
            }

            .navbar-brand i {
                font-size: 1.2rem;
            }

            .btn-signup-solid {
                padding: 8px 12px;
                font-size: 0.8rem;
            }

            .btn-login-text {
                padding: 8px 10px;
                font-size: 0.8rem;
            }

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

/* roulang page: category1 */
:root {
            --bg-primary: #0A2E1C;
            --bg-secondary: #123E25;
            --bg-tertiary: #0D3520;
            --bg-card: #0F3A22;
            --bg-dark: #072415;
            --accent-gold: #FFD700;
            --accent-gold-light: #FFE44D;
            --accent-gold-dark: #D4AC0D;
            --accent-red: #D32F2F;
            --accent-red-light: #EF5350;
            --text-white: #FFFFFF;
            --text-mint: #D1F2EB;
            --text-muted: #8FB3A5;
            --border-gold: rgba(255, 215, 0, 0.35);
            --border-mint: rgba(209, 242, 235, 0.2);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.25);
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.5);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-family: 'Be Vietnam Pro', sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-mint);
            line-height: 1.6;
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

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

        button {
            transition: var(--transition);
            cursor: pointer;
        }

        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent-gold);
            outline-offset: 2px;
        }

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

        /* ===== HEADER / NAVBAR ===== */
        .site-header {
            background: rgba(7, 36, 21, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-gold);
            position: sticky;
            top: 0;
            z-index: 1050;
            padding: 12px 0;
        }

        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--text-white) !important;
            letter-spacing: -0.02em;
        }

        .navbar-brand i {
            color: var(--accent-gold);
            font-size: 1.6rem;
            filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.5));
        }

        .navbar-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .nav-link-custom {
            padding: 8px 16px;
            border-radius: 50px;
            color: var(--text-mint);
            font-weight: 500;
            font-size: 0.9rem;
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }

        .nav-link-custom:hover {
            color: var(--accent-gold);
            background: rgba(255, 215, 0, 0.08);
        }

        .nav-link-custom.active {
            color: var(--bg-primary);
            background: var(--accent-gold);
            font-weight: 700;
            box-shadow: 0 2px 12px rgba(255, 215, 0, 0.4);
        }

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

        .btn-login-text {
            background: transparent;
            border: none;
            color: var(--text-mint);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 8px 12px;
            transition: var(--transition);
        }

        .btn-login-text:hover {
            color: var(--accent-gold);
        }

        .btn-signup-solid {
            background: var(--accent-gold);
            color: var(--bg-primary);
            border: none;
            padding: 10px 20px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 2px 15px rgba(255, 215, 0, 0.35);
            transition: var(--transition-bounce);
        }

        .btn-signup-solid:hover {
            background: var(--accent-gold-light);
            transform: translateY(-2px);
            box-shadow: 0 6px 25px rgba(255, 215, 0, 0.5);
        }

        .btn-signup-solid:active {
            transform: translateY(0) scale(0.97);
        }

        .navbar-toggle-mobile {
            display: none;
            background: transparent;
            border: 1px solid var(--border-gold);
            color: var(--accent-gold);
            font-size: 1.3rem;
            padding: 8px 14px;
            border-radius: 8px;
        }

        /* ===== HERO ===== */
        .hero-category {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
            overflow: hidden;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255, 215, 0, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-category::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(211, 47, 47, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 215, 0, 0.12);
            border: 1px solid var(--border-gold);
            color: var(--accent-gold);
            padding: 8px 18px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.85rem;
            margin-bottom: 20px;
            letter-spacing: 0.03em;
        }

        .hero-badge i {
            font-size: 0.9rem;
        }

        .hero-category h1 {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--text-white);
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.03em;
            max-width: 800px;
        }

        .hero-category h1 .highlight-gold {
            color: var(--accent-gold);
            position: relative;
            display: inline-block;
        }

        .hero-category h1 .highlight-gold::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--accent-gold);
            border-radius: 2px;
            opacity: 0.5;
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-mint);
            line-height: 1.7;
            max-width: 650px;
            margin-bottom: 30px;
        }

        .hero-stats-row {
            display: flex;
            gap: 30px;
            flex-wrap: wrap;
            margin-top: 10px;
        }

        .hero-stat-item {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .hero-stat-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(255, 215, 0, 0.12);
            border: 1px solid var(--border-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        .hero-stat-text {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.3;
        }

        .hero-stat-text strong {
            display: block;
            color: var(--text-white);
            font-size: 1.05rem;
            font-weight: 700;
        }

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

        .hero-image-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
        }

        .hero-image-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 20px;
            background: linear-gradient(to top, rgba(7, 36, 21, 0.95) 0%, transparent 100%);
        }

        .hero-image-overlay span {
            color: var(--accent-gold);
            font-weight: 600;
            font-size: 0.9rem;
        }

        /* ===== SECTION COMMON ===== */
        .section-block {
            padding: 70px 0;
            position: relative;
        }

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

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--accent-gold);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 12px;
            border-left: 3px solid var(--accent-gold);
            padding-left: 12px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            line-height: 1.25;
            letter-spacing: -0.02em;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.65;
            max-width: 700px;
        }

        /* ===== KNOWLEDGE LIST ===== */
        .knowledge-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .knowledge-list li {
            display: flex;
            gap: 16px;
            padding: 18px 0;
            border-bottom: 1px solid var(--border-mint);
            align-items: flex-start;
        }

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

        .knowledge-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 215, 0, 0.15);
            border: 1px solid var(--border-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-weight: 700;
            font-size: 1rem;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .knowledge-content h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .knowledge-content p {
            font-size: 0.95rem;
            color: var(--text-mint);
            line-height: 1.65;
            margin-bottom: 0;
        }

        /* ===== INFO CARD ===== */
        .info-card {
            background: var(--bg-card);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-lg);
            padding: 30px;
            height: 100%;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .info-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-gold), var(--accent-gold-light), var(--accent-gold));
            opacity: 0;
            transition: var(--transition);
        }

        .info-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 215, 0, 0.55);
        }

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

        .info-card-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: rgba(255, 215, 0, 0.12);
            border: 1px solid var(--border-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 1.4rem;
            margin-bottom: 18px;
        }

        .info-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 10px;
        }

        .info-card p {
            font-size: 0.9rem;
            color: var(--text-mint);
            line-height: 1.65;
            margin-bottom: 0;
        }

        /* ===== TERM TABLE ===== */
        .term-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .term-item {
            display: flex;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-mint);
            align-items: flex-start;
        }

        .term-item:last-child {
            border-bottom: none;
        }

        .term-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: rgba(255, 215, 0, 0.1);
            border: 1px solid var(--border-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 1rem;
            flex-shrink: 0;
        }

        .term-item h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--accent-gold);
            margin-bottom: 4px;
        }

        .term-item p {
            font-size: 0.9rem;
            color: var(--text-mint);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ===== CTA SECTION ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-dark) 100%);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-xl);
            padding: 50px 40px;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(255, 215, 0, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .cta-section p {
            font-size: 1rem;
            color: var(--text-mint);
            line-height: 1.65;
            margin-bottom: 24px;
            max-width: 600px;
        }

        .btn-cta-gold {
            background: var(--accent-gold);
            color: var(--bg-primary);
            border: none;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.4);
            transition: var(--transition-bounce);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-cta-gold:hover {
            background: var(--accent-gold-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(255, 215, 0, 0.55);
            color: var(--bg-primary);
        }

        .btn-cta-outline {
            background: transparent;
            border: 1px solid var(--border-gold);
            color: var(--accent-gold);
            padding: 14px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-cta-outline:hover {
            background: rgba(255, 215, 0, 0.1);
            border-color: var(--accent-gold);
            color: var(--accent-gold-light);
        }

        /* ===== FAQ ===== */
        .faq-wrapper {
            max-width: 850px;
            margin: 0 auto;
        }

        .accordion-custom .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-mint);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }

        .accordion-custom .accordion-item:hover {
            border-color: var(--border-gold);
        }

        .accordion-custom .accordion-button {
            background: var(--bg-card);
            color: var(--text-white);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 18px 24px;
            border: none;
            box-shadow: none;
            transition: var(--transition);
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(255, 215, 0, 0.08);
            color: var(--accent-gold);
            box-shadow: none;
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            border-color: var(--accent-gold);
        }

        .accordion-custom .accordion-button::after {
            filter: invert(1) sepia(1) saturate(5) hue-rotate(10deg);
        }

        .accordion-custom .accordion-body {
            background: var(--bg-card);
            color: var(--text-mint);
            font-size: 0.9rem;
            line-height: 1.65;
            padding: 18px 24px 24px;
        }

        /* ===== FOOTER ===== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-gold);
            padding: 50px 0 30px;
            margin-top: 60px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.3rem;
            color: var(--text-white);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .footer-brand i {
            color: var(--accent-gold);
            font-size: 1.5rem;
        }

        .footer-text {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 750px;
            margin-bottom: 20px;
        }

        .footer-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 24px;
        }

        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-mint);
            color: var(--text-mint);
            font-size: 0.8rem;
            font-weight: 500;
        }

        .footer-badge.highlight {
            background: rgba(255, 215, 0, 0.1);
            border-color: var(--border-gold);
            color: var(--accent-gold);
        }

        .footer-copyright {
            font-size: 0.8rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-mint);
            padding-top: 20px;
            margin-top: 10px;
        }

        /* ===== FAB ===== */
        .fab-floating {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1050;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: radial-gradient(circle at 30% 30%, #3a3a3a, #1a1a1a);
            border: 2px solid var(--accent-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 1.4rem;
            cursor: pointer;
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            animation: fab-breathe 3s ease-in-out infinite;
            transition: var(--transition-bounce);
            text-decoration: none;
            opacity: 0.7;
        }

        .fab-floating:hover {
            opacity: 1;
            transform: scale(1.1);
            color: var(--accent-gold-light);
            box-shadow: 0 6px 30px rgba(255, 215, 0, 0.5);
            animation-play-state: paused;
        }

        .fab-floating:active {
            transform: scale(0.95);
        }

        .fab-notification {
            position: absolute;
            top: 4px;
            right: 4px;
            width: 12px;
            height: 12px;
            background: var(--accent-red);
            border-radius: 50%;
            border: 2px solid var(--bg-dark);
            animation: fab-blink 1.5s ease-in-out infinite;
        }

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

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

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            .hero-category h1 {
                font-size: 2.3rem;
            }

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

        @media (max-width: 768px) {
            .navbar-toggle-mobile {
                display: block;
            }

            .navbar-links {
                display: none;
                flex-direction: column;
                align-items: stretch;
                width: 100%;
                gap: 4px;
                padding-top: 12px;
                order: 10;
            }

            .navbar-links.show {
                display: flex;
            }

            .nav-link-custom {
                padding: 10px 16px;
                width: 100%;
                text-align: left;
            }

            .navbar-actions {
                margin-left: auto;
            }

            .hero-category {
                padding: 50px 0 40px;
            }

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

            .hero-desc {
                font-size: 0.95rem;
            }

            .section-block {
                padding: 50px 0;
            }

            .section-title {
                font-size: 1.5rem;
            }

            .cta-section {
                padding: 30px 24px;
            }

            .cta-section h2 {
                font-size: 1.4rem;
            }

            .hero-image-wrapper img {
                min-height: 220px;
            }

            .hero-stats-row {
                gap: 16px;
            }

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

        @media (max-width: 520px) {
            .hero-category h1 {
                font-size: 1.5rem;
            }

            .section-title {
                font-size: 1.3rem;
            }

            .hero-stat-icon {
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }

            .hero-stat-text {
                font-size: 0.8rem;
            }

            .hero-stat-text strong {
                font-size: 0.9rem;
            }

            .btn-cta-gold,
            .btn-cta-outline {
                padding: 12px 20px;
                font-size: 0.85rem;
                width: 100%;
                justify-content: center;
            }

            .info-card {
                padding: 20px;
            }

            .knowledge-number {
                width: 32px;
                height: 32px;
                font-size: 0.85rem;
            }

            .knowledge-content h3 {
                font-size: 1rem;
            }

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

            .navbar-brand i {
                font-size: 1.3rem;
            }

            .btn-login-text {
                font-size: 0.8rem;
                padding: 6px 8px;
            }

            .btn-signup-solid {
                font-size: 0.8rem;
                padding: 8px 14px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #121212;
            --bg-secondary: #1C1C1E;
            --bg-card: #1E1E22;
            --accent-gold: #C5A059;
            --accent-amber: #FFBF00;
            --accent-bright-gold: #D4AC0D;
            --text-white: #F5F5F7;
            --text-muted: #B0B0B8;
            --text-light: #E8E8EC;
            --border-gold: rgba(197, 160, 89, 0.35);
            --border-subtle: rgba(255, 255, 255, 0.08);
            --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.45);
            --shadow-gold: 0 4px 20px rgba(197, 160, 89, 0.2);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --space-xs: 8px;
            --space-sm: 16px;
            --space-md: 24px;
            --space-lg: 40px;
            --space-xl: 64px;
            --font-base: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-base);
            background: var(--bg-primary);
            color: var(--text-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            transition: color 0.25s ease;
        }
        button {
            cursor: pointer;
            font-family: inherit;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: var(--space-md);
            padding-right: var(--space-md);
        }
        .section-padding {
            padding: var(--space-xl) 0;
        }
        .section-padding-sm {
            padding: var(--space-lg) 0;
        }
        .section-title {
            font-size: 1.85rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.3;
            margin-bottom: var(--space-sm);
            color: var(--text-white);
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 680px;
            line-height: 1.65;
        }
        .text-gold {
            color: var(--accent-gold);
        }
        .text-amber {
            color: var(--accent-amber);
        }
        .divider-gold {
            height: 2px;
            width: 64px;
            background: var(--accent-gold);
            margin: var(--space-sm) 0 var(--space-md);
            border-radius: 2px;
        }
        .btn-custom-gold {
            background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-amber) 100%);
            color: #1A1A1A;
            font-weight: 700;
            border: none;
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 1rem;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.01em;
            box-shadow: var(--shadow-gold);
        }
        .btn-custom-gold:hover {
            background: linear-gradient(135deg, #D9B36A 0%, #FFD54D 100%);
            color: #000;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(197, 160, 89, 0.35);
        }
        .btn-custom-outline {
            background: transparent;
            border: 1.5px solid var(--accent-gold);
            color: var(--accent-gold);
            font-weight: 600;
            padding: 12px 28px;
            border-radius: 50px;
            font-size: 0.95rem;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-custom-outline:hover {
            background: rgba(197, 160, 89, 0.12);
            border-color: var(--accent-amber);
            color: var(--accent-amber);
        }
        .btn-login-text {
            background: transparent;
            border: none;
            color: var(--text-white);
            font-weight: 600;
            padding: 10px 18px;
            font-size: 0.95rem;
            transition: color 0.25s ease;
        }
        .btn-login-text:hover {
            color: var(--accent-gold);
        }
        .btn-signup-solid {
            background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-amber) 100%);
            color: #1A1A1A;
            font-weight: 700;
            border: none;
            padding: 10px 26px;
            border-radius: 50px;
            font-size: 0.95rem;
            transition: all 0.3s ease;
            box-shadow: 0 4px 14px rgba(197, 160, 89, 0.3);
        }
        .btn-signup-solid:hover {
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(197, 160, 89, 0.4);
            color: #000;
        }
        .site-header {
            background: rgba(18, 18, 18, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            position: sticky;
            top: 0;
            z-index: 1050;
            padding: 14px 0;
        }
        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--space-md);
            flex-wrap: wrap;
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--accent-gold);
            white-space: nowrap;
        }
        .navbar-brand i {
            font-size: 1.8rem;
            color: var(--accent-amber);
        }
        .navbar-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-link-custom {
            color: var(--text-muted);
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 0.95rem;
            transition: all 0.25s ease;
            position: relative;
        }
        .nav-link-custom:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-link-custom.active {
            color: var(--accent-gold);
            background: rgba(197, 160, 89, 0.12);
            font-weight: 600;
        }
        .navbar-actions {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .navbar-toggle-mobile {
            background: transparent;
            border: 1px solid var(--border-subtle);
            color: var(--text-white);
            border-radius: var(--radius-sm);
            padding: 8px 14px;
            font-size: 1.3rem;
            display: none;
            transition: all 0.3s ease;
        }
        .navbar-toggle-mobile:hover {
            border-color: var(--accent-gold);
            color: var(--accent-gold);
        }
        .hero-flash {
            background: linear-gradient(135deg, #1A1A1A 0%, #242424 100%);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-lg);
            padding: var(--space-lg);
            margin-top: var(--space-md);
            position: relative;
            overflow: hidden;
        }
        .hero-flash::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(197, 160, 89, 0.08) 0%, transparent 70%);
            animation: subtleGlow 8s ease-in-out infinite;
            pointer-events: none;
        }
        @keyframes subtleGlow {
            0%, 100% { transform: translate(0,0); opacity: 0.5; }
            50% { transform: translate(10%, 10%); opacity: 0.9; }
        }
        .flash-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 191, 0, 0.15);
            color: var(--accent-amber);
            font-weight: 700;
            font-size: 0.9rem;
            padding: 8px 18px;
            border-radius: 50px;
            letter-spacing: 0.02em;
            border: 1px solid rgba(255, 191, 0, 0.3);
        }
        .flash-timer {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .timer-box {
            background: rgba(0,0,0,0.5);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-sm);
            padding: 10px 16px;
            text-align: center;
            min-width: 56px;
        }
        .timer-number {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--accent-amber);
            line-height: 1.2;
        }
        .timer-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--text-muted);
        }
        .flash-product-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: var(--space-md);
            transition: all 0.3s ease;
        }
        .flash-product-card:hover {
            border-color: var(--accent-gold);
            box-shadow: var(--shadow-gold);
        }
        .info-card-plain {
            background: transparent;
            border: none;
            padding: 0;
        }
        .strategy-step {
            display: flex;
            gap: var(--space-md);
            align-items: flex-start;
            padding: var(--space-sm) 0;
        }
        .step-number {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(197, 160, 89, 0.15);
            border: 1.5px solid var(--accent-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--accent-gold);
        }
        .step-content h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-white);
        }
        .step-content p {
            color: var(--text-muted);
            margin: 0;
            font-size: 0.95rem;
        }
        .list-check li {
            list-style: none;
            padding-left: 32px;
            position: relative;
            margin-bottom: 14px;
            color: var(--text-light);
            font-size: 0.98rem;
            line-height: 1.6;
        }
        .list-check li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            color: var(--accent-gold);
            font-size: 0.9rem;
            top: 2px;
        }
        .stat-block {
            display: flex;
            gap: var(--space-lg);
            flex-wrap: wrap;
            margin-top: var(--space-md);
        }
        .stat-item {
            flex: 1;
            min-width: 120px;
            border-left: 3px solid var(--accent-gold);
            padding-left: var(--space-sm);
        }
        .stat-number {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--accent-amber);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            letter-spacing: 0.03em;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-subtle);
            padding: var(--space-sm) 0;
        }
        .faq-question {
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-white);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: color 0.25s ease;
        }
        .faq-question:hover {
            color: var(--accent-gold);
        }
        .faq-answer {
            color: var(--text-muted);
            padding-top: var(--space-xs);
            font-size: 0.95rem;
            line-height: 1.65;
        }
        .faq-answer p {
            margin: 0;
        }
        .cta-panel {
            background: linear-gradient(135deg, #1C1C1E 0%, #2A2A2E 100%);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-xl);
            padding: var(--space-xl) var(--space-lg);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-panel::after {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(197, 160, 89, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }
        .site-footer {
            background: #0D0D0D;
            border-top: 1px solid var(--border-subtle);
            padding: var(--space-xl) 0 var(--space-md);
            margin-top: var(--space-xl);
        }
        .footer-content {
            display: flex;
            flex-direction: column;
            gap: var(--space-md);
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--accent-gold);
        }
        .footer-brand i {
            font-size: 1.6rem;
            color: var(--accent-amber);
        }
        .footer-text {
            color: var(--text-muted);
            font-size: 0.92rem;
            max-width: 760px;
            line-height: 1.65;
            margin: 0;
        }
        .footer-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-badge {
            background: rgba(255,255,255,0.04);
            border: 1px solid var(--border-subtle);
            border-radius: 50px;
            padding: 6px 16px;
            font-size: 0.82rem;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-badge.highlight {
            border-color: var(--accent-gold);
            color: var(--accent-gold);
            background: rgba(197, 160, 89, 0.08);
        }
        .footer-copyright {
            color: #666;
            font-size: 0.82rem;
            border-top: 1px solid var(--border-subtle);
            padding-top: var(--space-sm);
            margin-top: var(--space-sm);
        }
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1055;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(28, 28, 30, 0.85);
            backdrop-filter: blur(10px);
            border: 1.5px solid var(--accent-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 1.3rem;
            box-shadow: 0 4px 20px rgba(197, 160, 89, 0.3);
            transition: all 0.3s ease;
            opacity: 0.7;
            cursor: pointer;
        }
        .fab-left:hover {
            transform: scale(1.1);
            opacity: 1;
            box-shadow: 0 8px 30px rgba(197, 160, 89, 0.5);
        }
        .fab-left:active {
            transform: scale(0.95);
        }
        @media (max-width: 992px) {
            .navbar-links {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
                padding-top: var(--space-sm);
            }
            .navbar-links.open {
                display: flex;
            }
            .navbar-toggle-mobile {
                display: block;
            }
            .navbar-custom {
                align-items: center;
            }
            .navbar-actions {
                margin-left: auto;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .hero-flash {
                padding: var(--space-md);
            }
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: var(--space-lg) 0;
            }
            .navbar-brand {
                font-size: 1rem;
            }
            .btn-signup-solid {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
            .btn-login-text {
                padding: 8px 10px;
                font-size: 0.85rem;
            }
            .stat-block {
                gap: var(--space-sm);
            }
            .cta-panel {
                padding: var(--space-lg) var(--space-sm);
            }
            .flash-timer {
                gap: 6px;
            }
            .timer-box {
                padding: 8px 10px;
                min-width: 44px;
            }
            .timer-number {
                font-size: 1.2rem;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: var(--space-sm);
                padding-right: var(--space-sm);
            }
            .navbar-custom {
                gap: var(--space-xs);
            }
            .navbar-brand {
                font-size: 0.9rem;
            }
            .navbar-actions .btn-login-text {
                display: none;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .strategy-step {
                flex-direction: column;
                gap: var(--space-xs);
            }
        }

/* roulang page: category3 */
:root {
            --bg-deep: #08090F;
            --bg-card: #0D111E;
            --bg-elevated: #121827;
            --accent-electric: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-hot: #FF007F;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #7C8DB5;
            --border-subtle: rgba(0, 240, 255, 0.18);
            --border-glow: rgba(0, 240, 255, 0.55);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 18px rgba(0, 240, 255, 0.25);
            --space-section: 84px;
            --font-sans: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
        }

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

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease;
        }

        a:hover,
        a:focus {
            color: var(--accent-cyan);
            outline: none;
        }

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section-space {
            padding-top: var(--space-section);
            padding-bottom: var(--space-section);
        }

        .section-space-sm {
            padding-top: 48px;
            padding-bottom: 48px;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 16px;
        }

        .section-label::before {
            content: '';
            width: 28px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 4px;
        }

        .display-title {
            font-size: clamp(2rem, 4.5vw, 3.25rem);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 20px;
        }

        .lead-text {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 720px;
        }

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

        /* Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
        }

        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            gap: 24px;
        }

        .navbar-brand {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }

        .navbar-brand i {
            color: var(--accent-cyan);
            font-size: 1.7rem;
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.6);
        }

        .navbar-links {
            display: flex;
            align-items: center;
            gap: 28px;
            flex-wrap: wrap;
        }

        .nav-link-custom {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 6px 2px;
            transition: color 0.25s ease;
            white-space: nowrap;
        }

        .nav-link-custom::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0%;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 4px;
            transition: width 0.3s ease;
        }

        .nav-link-custom:hover,
        .nav-link-custom:focus {
            color: var(--text-primary);
        }

        .nav-link-custom:hover::after,
        .nav-link-custom.active::after {
            width: 100%;
        }

        .nav-link-custom.active {
            color: var(--accent-cyan);
        }

        .navbar-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .btn-login-text {
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 10px 16px;
            border-radius: 50px;
            transition: all 0.25s ease;
            white-space: nowrap;
        }

        .btn-login-text:hover,
        .btn-login-text:focus {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }

        .btn-signup-solid {
            font-size: 0.92rem;
            font-weight: 700;
            color: var(--bg-deep);
            background: linear-gradient(135deg, var(--accent-electric), var(--accent-cyan));
            padding: 10px 22px;
            border-radius: 50px;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.35);
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .btn-signup-solid:hover,
        .btn-signup-solid:focus {
            transform: translateY(-2px);
            box-shadow: 0 0 26px rgba(0, 240, 255, 0.55);
            color: var(--bg-deep);
        }

        .navbar-toggle-mobile {
            display: none;
            font-size: 1.6rem;
            color: var(--text-primary);
            padding: 6px;
            border-radius: 8px;
        }

        /* Hero */
        .hero-category {
            background: linear-gradient(160deg, #08090F 0%, #0D111E 55%, #121827 100%);
            padding: 76px 0 68px;
            position: relative;
            overflow: hidden;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.22), transparent 68%);
            pointer-events: none;
        }

        .hero-category::after {
            content: '';
            position: absolute;
            bottom: -140px;
            left: -90px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.15), transparent 68%);
            pointer-events: none;
        }

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

        .hero-panel {
            background: rgba(13, 17, 30, 0.85);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 36px;
            backdrop-filter: blur(8px);
            box-shadow: var(--shadow-card);
        }

        .hero-panel h1 {
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.015em;
            margin-bottom: 18px;
        }

        .hero-panel .lead-text {
            max-width: 660px;
        }

        .data-panel {
            background: rgba(8, 9, 15, 0.7);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 26px;
            box-shadow: var(--shadow-card);
        }

        .data-panel .data-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .data-panel .data-item:last-child {
            border-bottom: none;
        }

        .data-panel .data-icon {
            width: 42px;
            height: 42px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-subtle);
            border-radius: 10px;
            color: var(--accent-cyan);
            font-size: 1.2rem;
        }

        .data-panel .data-value {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.2;
        }

        .data-panel .data-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* Buttons */
        .btn-primary-glow {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1rem;
            font-weight: 700;
            color: var(--bg-deep);
            background: linear-gradient(135deg, var(--accent-electric), var(--accent-cyan));
            padding: 14px 32px;
            border-radius: 50px;
            box-shadow: 0 0 22px rgba(0, 240, 255, 0.35);
            transition: all 0.3s ease;
            border: none;
        }

        .btn-primary-glow:hover,
        .btn-primary-glow:focus {
            transform: translateY(-2px);
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.6);
            color: var(--bg-deep);
        }

        .btn-outline-cyan {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--accent-cyan);
            background: transparent;
            border: 1.5px solid var(--accent-cyan);
            padding: 13px 30px;
            border-radius: 50px;
            transition: all 0.3s ease;
        }

        .btn-outline-cyan:hover,
        .btn-outline-cyan:focus {
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.25);
        }

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

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            color: var(--text-secondary);
            font-size: 1rem;
        }

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

        .feature-list li i {
            color: var(--accent-cyan);
            font-size: 1.1rem;
            margin-top: 4px;
            flex-shrink: 0;
        }

        /* Card review */
        .review-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px;
            height: 100%;
            transition: all 0.35s ease;
            position: relative;
            overflow: hidden;
        }

        .review-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-electric), var(--accent-cyan));
            opacity: 0;
            transition: opacity 0.35s ease;
        }

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

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

        .review-card .card-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.78rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            color: var(--accent-hot);
            background: rgba(255, 0, 127, 0.12);
            padding: 6px 14px;
            border-radius: 50px;
            margin-bottom: 18px;
        }

        .review-card h3 {
            font-size: 1.35rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-primary);
        }

        .review-card p {
            color: var(--text-secondary);
            font-size: 0.98rem;
            margin-bottom: 0;
        }

        .review-score {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--accent-cyan);
            margin-top: 16px;
        }

        .review-score small {
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-muted);
        }

        /* Step timeline */
        .step-list {
            list-style: none;
            padding: 0;
            margin: 0;
            counter-reset: step-counter;
        }

        .step-list li {
            display: flex;
            align-items: flex-start;
            gap: 18px;
            padding: 22px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            counter-increment: step-counter;
        }

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

        .step-list li::before {
            content: counter(step-counter, decimal-leading-zero);
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-cyan);
            opacity: 0.55;
            line-height: 1;
            min-width: 48px;
            flex-shrink: 0;
        }

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

        .step-list p {
            color: var(--text-secondary);
            font-size: 0.98rem;
            margin-bottom: 0;
        }

        /* FAQ */
        .accordion-custom .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md) !important;
            margin-bottom: 16px;
            overflow: hidden;
        }

        .accordion-custom .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1.05rem;
            padding: 20px 24px;
            box-shadow: none;
            border: none;
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.05);
            color: var(--accent-cyan);
            box-shadow: none;
        }

        .accordion-custom .accordion-button::after {
            filter: invert(80%) sepia(30%) saturate(500%) hue-rotate(140deg);
        }

        .accordion-custom .accordion-body {
            color: var(--text-secondary);
            padding: 0 24px 22px;
            font-size: 0.98rem;
        }

        /* CTA */
        .cta-banner {
            background: linear-gradient(145deg, #0D111E 0%, #121827 50%, #0A0F1C 100%);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.2), transparent 70%);
        }

        .cta-banner h2 {
            font-size: clamp(1.7rem, 3vw, 2.5rem);
            font-weight: 800;
            letter-spacing: -0.01em;
            margin-bottom: 16px;
            position: relative;
            z-index: 2;
        }

        .cta-banner p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 600px;
            position: relative;
            z-index: 2;
        }

        /* Floating Action Button */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1080;
            width: 56px;
            height: 56px;
            border-radius: 18px;
            background: rgba(8, 9, 15, 0.7);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(8, 9, 15, 0.7), rgba(8, 9, 15, 0.7)), linear-gradient(135deg, var(--accent-cyan), var(--accent-electric));
            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 18px rgba(0, 240, 255, 0.45);
            opacity: 0.65;
            transition: all 0.35s ease;
            animation: fabFloat 3.2s ease-in-out infinite;
        }

        .fab-support:hover,
        .fab-support:focus {
            opacity: 1;
            transform: scale(1.08);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.75);
            color: var(--accent-cyan);
        }

        .fab-support:active {
            transform: scale(0.94);
        }

        .fab-support .notification-dot {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 14px;
            height: 14px;
            background: var(--accent-hot);
            border-radius: 50%;
            border: 2px solid var(--bg-deep);
            animation: blinkDot 1.6s ease-in-out infinite;
        }

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

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

        /* Footer */
        .site-footer {
            background: #06070C;
            border-top: 1px solid var(--border-subtle);
            padding: 56px 0 36px;
            margin-top: 24px;
        }

        .footer-content {
            display: flex;
            flex-direction: column;
            gap: 22px;
        }

        .footer-brand {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-brand i {
            color: var(--accent-cyan);
            font-size: 1.6rem;
            text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
        }

        .footer-text {
            color: var(--text-secondary);
            font-size: 0.95rem;
            max-width: 780px;
            margin-bottom: 0;
            line-height: 1.7;
        }

        .footer-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            padding: 8px 16px;
            border-radius: 50px;
        }

        .footer-badge.highlight {
            color: var(--accent-cyan);
            border-color: var(--border-subtle);
        }

        .footer-copyright {
            font-size: 0.85rem;
            color: var(--text-muted);
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        /* Responsive */
        @media (max-width: 991.98px) {
            .navbar-links {
                gap: 18px;
            }
        }

        @media (max-width: 767.98px) {
            .navbar-custom {
                flex-wrap: wrap;
                gap: 12px;
            }

            .navbar-toggle-mobile {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .navbar-links {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
                padding: 16px 0 8px;
                border-top: 1px solid rgba(255, 255, 255, 0.06);
                margin-top: 4px;
            }

            .navbar-links.open {
                display: flex;
            }

            .navbar-actions {
                margin-left: auto;
            }

            .nav-link-custom {
                padding: 10px 0;
                font-size: 1rem;
                width: 100%;
            }

            .hero-category {
                padding: 48px 0 44px;
            }

            .hero-panel {
                padding: 24px 20px;
            }

            .data-panel {
                padding: 20px;
                margin-top: 20px;
            }

            .section-space {
                padding-top: 56px;
                padding-bottom: 56px;
            }

            .section-space-sm {
                padding-top: 36px;
                padding-bottom: 36px;
            }

            .cta-banner {
                padding: 32px 22px;
            }

            .btn-primary-glow,
            .btn-outline-cyan {
                width: 100%;
                justify-content: center;
            }

            .fab-support {
                left: 12px;
                bottom: 72px;
                width: 50px;
                height: 50px;
                border-radius: 16px;
                font-size: 1.25rem;
            }
        }

        @media (max-width: 519.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .navbar-brand {
                font-size: 1.1rem;
                gap: 6px;
            }

            .navbar-brand i {
                font-size: 1.3rem;
            }

            .btn-login-text {
                padding: 8px 10px;
                font-size: 0.85rem;
            }

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

            .hero-panel h1 {
                font-size: 1.7rem;
            }

            .display-title {
                font-size: 1.75rem;
            }

            .review-card {
                padding: 20px 16px;
            }

            .step-list li {
                gap: 12px;
                padding: 16px 0;
            }

            .step-list li::before {
                font-size: 1.4rem;
                min-width: 36px;
            }
        }