/* roulang page: index */
:root {
            --bg-primary: #0B0B0B;
            --bg-secondary: #161616;
            --accent-primary: #FF4500;
            --accent-secondary: #FF0000;
            --text-primary: #FFFFFF;
            --text-secondary: #CCCCCC;
            --border-dark: #2A2A2A;
            --card-bg: #1C1C1C;
            --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-body: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

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

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

        h1, h2, h3, h4, h5 {
            font-family: var(--font-heading);
            font-weight: 700;
        }

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

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

        .container-fluid, .container {
            padding-left: 16px;
            padding-right: 16px;
        }

        @media (min-width: 768px) {
            .container {
                padding-left: 40px;
                padding-right: 40px;
            }
        }

        /* Custom Navbar */
        .custom-navbar {
            background: rgba(11, 11, 11, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-dark);
            padding: 0.8rem 0;
            transition: all 0.3s ease;
        }

        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.4rem;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }

        .navbar-brand span {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .navbar-nav .nav-link {
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.6rem 1.2rem;
            border-radius: 8px;
            margin: 0 0.15rem;
            transition: all 0.2s ease;
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--text-primary);
            background: rgba(255, 69, 0, 0.15);
        }

        .btn-login {
            background: transparent;
            color: var(--text-primary);
            border: 2px solid var(--border-dark);
            font-weight: 700;
            padding: 0.5rem 1.3rem;
            border-radius: 10px;
            transition: all 0.3s ease;
        }

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

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
            border: none;
            font-weight: 700;
            padding: 0.5rem 1.5rem;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(255, 69, 0, 0.3);
            transition: all 0.3s ease;
        }

        .btn-signup:hover {
            box-shadow: 0 6px 20px rgba(255, 69, 0, 0.5);
            transform: translateY(-2px);
        }

        .navbar-toggler {
            border: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            padding: 0.25rem 0.5rem;
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: none;
        }

        @media (max-width: 992px) {
            .custom-navbar .d-flex.align-items-center {
                margin-top: 1rem;
                justify-content: space-between;
                width: 100%;
            }
        }

        /* Hero Section */
        .hero-section {
            position: relative;
            background: linear-gradient(rgba(11, 11, 11, 0.75), rgba(11, 11, 11, 0.9)), 
                        url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            min-height: 85vh;
            display: flex;
            align-items: center;
            padding: 6rem 0 5rem;
            border-bottom: 2px solid var(--accent-primary);
        }

        .hero-badge {
            background: rgba(255, 69, 0, 0.2);
            color: var(--accent-primary);
            border: 1px solid var(--accent-primary);
            font-weight: 700;
            font-size: 0.9rem;
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            display: inline-block;
            letter-spacing: 1px;
        }

        .hero-title {
            font-size: 3.2rem;
            font-weight: 900;
            line-height: 1.2;
            margin: 1.2rem 0;
        }

        .hero-title span {
            background: linear-gradient(135deg, var(--accent-primary), #FFB366);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 620px;
            line-height: 1.7;
            margin-bottom: 2rem;
        }

        .btn-hero-primary {
            background: var(--accent-primary);
            color: #fff;
            font-weight: 800;
            padding: 0.85rem 2.2rem;
            border-radius: 12px;
            border: none;
            font-size: 1.1rem;
            box-shadow: 0 8px 25px rgba(255, 69, 0, 0.4);
            transition: all 0.3s ease;
        }

        .btn-hero-primary:hover {
            background: #e03e00;
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(255, 69, 0, 0.6);
            color: #fff;
        }

        .btn-hero-outline {
            background: transparent;
            color: var(--text-primary);
            font-weight: 700;
            padding: 0.85rem 2rem;
            border-radius: 12px;
            border: 2px solid var(--text-secondary);
            font-size: 1.1rem;
            transition: all 0.3s ease;
        }

        .btn-hero-outline:hover {
            border-color: var(--accent-primary);
            color: var(--accent-primary);
        }

        .hero-mockup {
            background: var(--card-bg);
            border: 2px solid var(--border-dark);
            border-radius: 20px;
            padding: 1.5rem;
            box-shadow: 0 20px 40px rgba(255, 69, 0, 0.15);
        }

        .hero-stat {
            border-left: 3px solid var(--accent-primary);
            padding-left: 1rem;
        }

        .hero-stat h4 {
            color: var(--accent-primary);
            font-weight: 800;
            margin-bottom: 0.3rem;
        }

        /* Section Common */
        .section-padding {
            padding: 5rem 0;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 0.8rem;
        }

        .section-subtitle {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 650px;
            line-height: 1.65;
        }

        .accent-divider {
            width: 50px;
            height: 4px;
            background: var(--accent-primary);
            border-radius: 4px;
            margin: 1rem 0 2rem;
        }

        /* News Section (CMS Loop) */
        .news-list-item {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: 14px;
            padding: 1.25rem 1.5rem;
            margin-bottom: 1rem;
            transition: all 0.25s ease;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .news-list-item:hover {
            border-color: var(--accent-primary);
            transform: translateX(6px);
            box-shadow: 8px 8px 20px rgba(255, 69, 0, 0.1);
        }

        .news-meta {
            font-size: 0.85rem;
            color: var(--accent-primary);
            font-weight: 600;
        }

        .news-title-link {
            color: var(--text-primary);
            font-weight: 700;
            font-size: 1.1rem;
        }

        .news-title-link:hover {
            color: var(--accent-primary);
        }

        .news-summary {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-top: 0.3rem;
        }

        .news-arrow {
            color: var(--accent-primary);
            font-size: 1.4rem;
            flex-shrink: 0;
            margin-left: 1.5rem;
        }

        /* Services Blast */
        .service-blast-card {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: 18px;
            padding: 2rem 1.5rem;
            height: 100%;
            transition: 0.3s ease;
            position: relative;
        }

        .service-blast-card:hover {
            border-color: var(--accent-primary);
            box-shadow: 0 12px 28px rgba(255, 69, 0, 0.2);
        }

        .service-icon {
            font-size: 2.2rem;
            color: var(--accent-primary);
            margin-bottom: 1.2rem;
        }

        /* App Download Block */
        .app-showcase {
            background: linear-gradient(45deg, #1C1C1C 0%, #0B0B0B 100%);
            border: 2px solid var(--border-dark);
            border-radius: 24px;
            padding: 3rem;
        }

        .app-btn {
            background: #fff;
            color: #000;
            font-weight: 800;
            padding: 0.8rem 2rem;
            border-radius: 50px;
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            transition: 0.3s;
        }

        .app-btn:hover {
            background: var(--accent-primary);
            color: #fff;
        }

        /* FAQ */
        .accordion-button {
            background: var(--card-bg);
            color: var(--text-primary);
            font-weight: 700;
            border: none;
            border-bottom: 1px solid var(--border-dark);
            padding: 1.2rem 1.5rem;
            box-shadow: none;
        }

        .accordion-button:not(.collapsed) {
            background: #2A1105;
            color: var(--accent-primary);
        }

        .accordion-item {
            background: transparent;
            border: none;
        }

        .accordion-body {
            background: var(--bg-secondary);
            color: var(--text-secondary);
            padding: 1.2rem 1.5rem;
            line-height: 1.7;
        }

        /* About / Footer */
        .footer-section {
            background: var(--bg-secondary);
            border-top: 2px solid var(--accent-primary);
            padding: 3rem 0 1.5rem;
        }

        .footer-brand {
            font-size: 1.8rem;
            font-weight: 900;
        }

        .footer-link {
            color: var(--text-secondary);
            transition: 0.3s;
        }

        .footer-link:hover {
            color: var(--accent-primary);
        }

        .copyright {
            color: var(--text-secondary);
            font-size: 0.9rem;
            border-top: 1px solid var(--border-dark);
            padding-top: 1.5rem;
            margin-top: 2rem;
        }

        /* FAB Left (Volcanic Style) */
        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 1050;
            width: 56px;
            height: 56px;
            background: rgba(11, 11, 11, 0.8);
            backdrop-filter: blur(10px);
            border-radius: 30px;
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-primary);
            font-size: 1.8rem;
            box-shadow: 0 0 18px rgba(255, 69, 0, 0.6);
            transition: 0.3s;
            animation: fabPulse 2s infinite;
        }

        .fab-left:hover {
            background: var(--accent-primary);
            color: #fff;
            transform: scale(1.1);
            box-shadow: 0 0 30px var(--accent-primary);
        }

        @keyframes fabPulse {
            0% { box-shadow: 0 0 15px rgba(255, 69, 0, 0.5); }
            50% { box-shadow: 0 0 28px rgba(255, 69, 0, 0.85); }
            100% { box-shadow: 0 0 15px rgba(255, 69, 0, 0.5); }
        }

        /* Festival Campaign Block */
        .festival-block {
            background: linear-gradient(135deg, #1A0A00, #2E1200);
            border: 2px solid var(--accent-primary);
            border-radius: 24px;
            padding: 2.5rem;
            position: relative;
            overflow: hidden;
        }

        .festival-badge {
            background: var(--accent-primary);
            color: #000;
            font-weight: 900;
            padding: 0.3rem 1.4rem;
            border-radius: 30px;
            display: inline-block;
            font-size: 0.9rem;
        }

        /* Steps Guide */
        .step-number {
            background: var(--accent-primary);
            color: #000;
            width: 45px;
            height: 45px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.3rem;
            flex-shrink: 0;
        }

        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.2rem;
            }
            .section-title {
                font-size: 1.9rem;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #0B0B0B;
            --bg-secondary: #161616;
            --accent-primary: #FF4500;
            --accent-secondary: #FF0000;
            --text-primary: #FFFFFF;
            --text-secondary: #CCCCCC;
            --border-dark: #2A2A2A;
            --card-bg: #1C1C1C;
            --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-body: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        * {
            box-sizing: border-box;
        }
        
        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }
        
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease;
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        .container {
            padding-left: 40px;
            padding-right: 40px;
        }
        
        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }
        
        /* Custom Navbar */
        .custom-navbar {
            background: rgba(11, 11, 11, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-dark);
            padding: 0.8rem 0;
            transition: all 0.3s ease;
        }
        
        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.4rem;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }
        
        .navbar-brand span {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .navbar-nav .nav-link {
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.6rem 1.2rem;
            border-radius: 8px;
            margin: 0 0.15rem;
            transition: all 0.2s ease;
        }
        
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--text-primary);
            background: rgba(255, 69, 0, 0.15);
        }
        
        .btn-login {
            background: transparent;
            color: var(--text-primary);
            border: 2px solid var(--border-dark);
            font-weight: 700;
            padding: 0.5rem 1.3rem;
            border-radius: 10px;
            transition: all 0.3s ease;
            display: inline-block;
        }
        
        .btn-login:hover {
            border-color: var(--accent-primary);
            color: var(--accent-primary);
        }
        
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
            border: none;
            font-weight: 700;
            padding: 0.5rem 1.5rem;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(255, 69, 0, 0.3);
            transition: all 0.3s ease;
            display: inline-block;
        }
        
        .btn-signup:hover {
            box-shadow: 0 6px 20px rgba(255, 69, 0, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }
        
        .navbar-toggler {
            border: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            padding: 0.25rem 0.5rem;
        }
        
        .navbar-toggler:focus {
            box-shadow: none;
            outline: none;
        }
        
        @media (max-width: 991px) {
            .custom-navbar .d-flex.align-items-center {
                margin-top: 1rem;
                justify-content: space-between;
                width: 100%;
            }
        }
        
        /* Article Header */
        .article-header-section {
            background: linear-gradient(rgba(11, 11, 11, 0.85), rgba(11, 11, 11, 0.95)), 
                        url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            padding: 5rem 0 3rem;
            border-bottom: 2px solid var(--accent-primary);
        }
        
        .article-category-badge {
            background: rgba(255, 69, 0, 0.2);
            color: var(--accent-primary);
            border: 1px solid var(--accent-primary);
            font-weight: 700;
            font-size: 0.85rem;
            padding: 0.35rem 1rem;
            border-radius: 50px;
            display: inline-block;
            letter-spacing: 0.5px;
        }
        
        .article-title {
            font-size: 2.8rem;
            font-weight: 900;
            line-height: 1.25;
            margin: 1.2rem 0;
            font-family: var(--font-heading);
        }
        
        .article-meta {
            color: var(--text-secondary);
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        
        .article-meta i {
            color: var(--accent-primary);
        }
        
        /* Article Content */
        .article-content-section {
            padding: 3rem 0;
            background: var(--bg-primary);
        }
        
        .article-body {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: 16px;
            padding: 2.5rem;
            color: var(--text-secondary);
            line-height: 1.8;
            font-size: 1.05rem;
        }
        
        .article-body h2 {
            color: var(--text-primary);
            font-weight: 800;
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-size: 1.6rem;
            border-left: 4px solid var(--accent-primary);
            padding-left: 1rem;
        }
        
        .article-body h3 {
            color: var(--text-primary);
            font-weight: 700;
            margin-top: 1.5rem;
            margin-bottom: 0.8rem;
            font-size: 1.3rem;
        }
        
        .article-body p {
            margin-bottom: 1.2rem;
        }
        
        .article-body strong {
            color: var(--text-primary);
            font-weight: 700;
        }
        
        .article-body ul, .article-body ol {
            padding-left: 1.5rem;
            margin-bottom: 1.2rem;
        }
        
        .article-body li {
            margin-bottom: 0.5rem;
        }
        
        .article-body img {
            border-radius: 12px;
            margin: 1.5rem 0;
            border: 1px solid var(--border-dark);
        }
        
        .article-body a {
            color: var(--accent-primary);
            text-decoration: underline;
        }
        
        .article-body a:hover {
            color: #e03e00;
        }
        
        .article-body blockquote {
            background: rgba(255, 69, 0, 0.08);
            border-left: 4px solid var(--accent-primary);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
            color: var(--text-primary);
            font-style: italic;
        }
        
        .article-not-found {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: 16px;
            padding: 3rem;
            text-align: center;
        }
        
        .article-not-found i {
            font-size: 3rem;
            color: var(--accent-primary);
            margin-bottom: 1rem;
        }
        
        .article-not-found h3 {
            color: var(--text-primary);
            font-weight: 700;
            margin-bottom: 1rem;
        }
        
        .article-not-found .btn-back {
            background: var(--accent-primary);
            color: #fff;
            font-weight: 700;
            padding: 0.7rem 1.8rem;
            border-radius: 10px;
            transition: all 0.3s ease;
            display: inline-block;
            margin-top: 1rem;
        }
        
        .article-not-found .btn-back:hover {
            background: #e03e00;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 69, 0, 0.4);
        }
        
        @media (max-width: 768px) {
            .article-title {
                font-size: 2rem;
            }
            .article-body {
                padding: 1.5rem;
            }
            .article-header-section {
                padding: 3.5rem 0 2rem;
            }
        }
        
        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-secondary), #1a0a00);
            padding: 4rem 0;
            border-top: 2px solid var(--accent-primary);
            border-bottom: 2px solid var(--accent-primary);
        }
        
        .cta-card {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: 16px;
            padding: 2rem;
            text-align: center;
        }
        
        .cta-card h3 {
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }
        
        .cta-card p {
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
        }
        
        .btn-cta-primary {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
            border: none;
            font-weight: 800;
            padding: 0.8rem 2rem;
            border-radius: 12px;
            font-size: 1.05rem;
            box-shadow: 0 8px 25px rgba(255, 69, 0, 0.4);
            transition: all 0.3s ease;
            display: inline-block;
        }
        
        .btn-cta-primary:hover {
            box-shadow: 0 12px 30px rgba(255, 69, 0, 0.6);
            transform: translateY(-2px);
            color: #fff;
        }
        
        /* Footer */
        .footer-section {
            background: var(--bg-secondary);
            padding: 3rem 0 2rem;
            border-top: 1px solid var(--border-dark);
        }
        
        .footer-brand {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.3rem;
            color: var(--text-primary);
        }
        
        .footer-link {
            color: var(--text-secondary);
            transition: color 0.3s ease;
            display: block;
            padding: 0.3rem 0;
        }
        
        .footer-link:hover {
            color: var(--accent-primary);
        }
        
        .copyright {
            color: var(--text-secondary);
            font-size: 0.85rem;
            border-top: 1px solid var(--border-dark);
            padding-top: 1.5rem;
            margin-top: 2rem;
        }
        
        /* FAB */
        .fab-float {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 1050;
            width: 56px;
            height: 56px;
            background: var(--card-bg);
            border: 2px solid var(--accent-primary);
            border-radius: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 20px rgba(255, 69, 0, 0.4);
            transition: all 0.3s ease;
            opacity: 0.75;
            cursor: pointer;
        }
        
        .fab-float:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(255, 69, 0, 0.7);
        }
        
        .fab-float i {
            color: var(--accent-primary);
            font-size: 1.5rem;
        }
        
        .fab-float .notification-dot {
            position: absolute;
            top: 6px;
            right: 8px;
            width: 12px;
            height: 12px;
            background: var(--accent-secondary);
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: pulse-dot 2s infinite;
        }
        
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0B0B0B;
            --bg-secondary: #161616;
            --accent-primary: #FF4500;
            --accent-secondary: #FF0000;
            --text-primary: #FFFFFF;
            --text-secondary: #CCCCCC;
            --border-dark: #2A2A2A;
            --card-bg: #1C1C1C;
            --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-body: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        * {
            box-sizing: border-box;
        }
        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container-fluid, .container {
            padding-left: 16px;
            padding-right: 16px;
        }
        @media (min-width: 992px) {
            .container {
                padding-left: 40px;
                padding-right: 40px;
            }
        }
        .custom-navbar {
            background: rgba(11, 11, 11, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-dark);
            padding: 0.8rem 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.4rem;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }
        .navbar-brand span {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .navbar-nav .nav-link {
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.6rem 1.2rem;
            border-radius: 8px;
            margin: 0 0.15rem;
            transition: all 0.2s ease;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--text-primary);
            background: rgba(255, 69, 0, 0.15);
        }
        .btn-login {
            background: transparent;
            color: var(--text-primary);
            border: 2px solid var(--border-dark);
            font-weight: 700;
            padding: 0.5rem 1.3rem;
            border-radius: 10px;
            transition: all 0.3s ease;
            display: inline-block;
        }
        .btn-login:hover {
            border-color: var(--accent-primary);
            color: var(--accent-primary);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
            border: none;
            font-weight: 700;
            padding: 0.5rem 1.5rem;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(255, 69, 0, 0.3);
            transition: all 0.3s ease;
            display: inline-block;
        }
        .btn-signup:hover {
            box-shadow: 0 6px 20px rgba(255, 69, 0, 0.5);
            transform: translateY(-2px);
        }
        .navbar-toggler {
            border: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            padding: 0.25rem 0.5rem;
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: none;
        }
        @media (max-width: 991.98px) {
            .custom-navbar .d-flex.align-items-center {
                margin-top: 1rem;
                justify-content: space-between;
                width: 100%;
            }
        }
        .hero-section {
            position: relative;
            background: linear-gradient(rgba(11, 11, 11, 0.65), rgba(11, 11, 11, 0.85)),
                        url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
            min-height: 65vh;
            display: flex;
            align-items: center;
            padding: 6rem 0 5rem;
            border-bottom: 2px solid var(--accent-primary);
        }
        .countdown-circle {
            width: 90px;
            height: 90px;
            border-radius: 50%;
            border: 3px solid var(--accent-primary);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            background: rgba(255, 69, 0, 0.1);
            color: var(--accent-primary);
            font-weight: 900;
            font-size: 1.8rem;
        }
        .hero-badge {
            background: rgba(255, 69, 0, 0.2);
            color: var(--accent-primary);
            border: 1px solid var(--accent-primary);
            font-weight: 700;
            font-size: 0.9rem;
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            display: inline-block;
            letter-spacing: 1px;
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 900;
            line-height: 1.2;
            margin: 1.2rem 0;
        }
        .hero-title span {
            background: linear-gradient(135deg, var(--accent-primary), #FFB366);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 620px;
            line-height: 1.7;
            margin-bottom: 2rem;
        }
        .btn-hero-primary {
            background: var(--accent-primary);
            color: #fff;
            font-weight: 800;
            padding: 0.85rem 2.2rem;
            border-radius: 12px;
            border: none;
            font-size: 1.1rem;
            box-shadow: 0 8px 25px rgba(255, 69, 0, 0.4);
            transition: all 0.3s ease;
        }
        .btn-hero-primary:hover {
            background: #e03e00;
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(255, 69, 0, 0.6);
            color: #fff;
        }
        .promo-card {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: 16px;
            padding: 2rem;
            transition: all 0.3s ease;
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .promo-card:hover {
            border-color: var(--accent-primary);
            box-shadow: 0 12px 30px rgba(255, 69, 0, 0.2);
            transform: translateY(-4px);
        }
        .promo-card::before {
            content: '';
            position: absolute;
            top: -20px;
            right: -20px;
            width: 80px;
            height: 80px;
            background: var(--accent-primary);
            border-radius: 50%;
            opacity: 0.08;
        }
        .promo-tag {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
            font-weight: 700;
            font-size: 0.8rem;
            padding: 0.3rem 1rem;
            border-radius: 20px;
            display: inline-block;
            margin-bottom: 1rem;
        }
        .code-box {
            background: var(--bg-secondary);
            border: 1px dashed var(--accent-primary);
            padding: 0.8rem 1.5rem;
            border-radius: 8px;
            font-family: monospace;
            font-size: 1.2rem;
            color: var(--accent-primary);
            display: inline-block;
            letter-spacing: 1px;
        }
        .btn-copy {
            background: var(--accent-primary);
            color: #fff;
            border: none;
            padding: 0.5rem 1.2rem;
            border-radius: 8px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-copy:hover {
            background: #e03e00;
            color: #fff;
        }
        .step-card {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: 16px;
            padding: 2rem 1.5rem;
            text-align: left;
            transition: all 0.3s ease;
            position: relative;
        }
        .step-number {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            margin-bottom: 1rem;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: 12px;
            padding: 1.5rem;
            margin-bottom: 1rem;
            transition: all 0.3s ease;
        }
        .faq-item:hover {
            border-color: var(--accent-primary);
        }
        .faq-question {
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--accent-primary);
            cursor: pointer;
        }
        .cta-section {
            background: linear-gradient(rgba(11, 11, 11, 0.9), rgba(11, 11, 11, 0.9)),
                        url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            padding: 4rem 0;
            border-radius: 20px;
            margin: 3rem 0;
            border: 1px solid var(--accent-primary);
        }
        .footer-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-dark);
            padding: 3rem 0 1rem;
            margin-top: 3rem;
        }
        .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
        }
        .footer-link {
            color: var(--text-secondary);
            transition: color 0.3s ease;
        }
        .footer-link:hover {
            color: var(--accent-primary);
        }
        .copyright {
            border-top: 1px solid var(--border-dark);
            padding-top: 1.5rem;
            margin-top: 1.5rem;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2rem;
            }
            .hero-section {
                min-height: auto;
                padding: 4rem 0 3rem;
            }
            .countdown-circle {
                width: 60px;
                height: 60px;
                font-size: 1.2rem;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0B0B0B;
            --bg-secondary: #161616;
            --accent-primary: #FF4500;
            --accent-secondary: #FF0000;
            --text-primary: #FFFFFF;
            --text-secondary: #CCCCCC;
            --border-dark: #2A2A2A;
            --card-bg: #1C1C1C;
            --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-body: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

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

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

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

        .container-fluid,
        .container {
            padding-left: 16px;
            padding-right: 16px;
        }

        @media(min-width:992px) {
            .container {
                padding-left: 40px;
                padding-right: 40px;
            }
        }

        /* Custom Navbar */
        .custom-navbar {
            background: rgba(11, 11, 11, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-dark);
            padding: 0.8rem 0;
            transition: all 0.3s ease;
        }

        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.4rem;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }

        .navbar-brand span {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .navbar-nav .nav-link {
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.6rem 1.2rem;
            border-radius: 8px;
            margin: 0 0.15rem;
            transition: all 0.2s ease;
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--text-primary);
            background: rgba(255, 69, 0, 0.15);
        }

        .btn-login {
            background: transparent;
            color: var(--text-primary);
            border: 2px solid var(--border-dark);
            font-weight: 700;
            padding: 0.5rem 1.3rem;
            border-radius: 10px;
            transition: all 0.3s ease;
        }

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

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
            border: none;
            font-weight: 700;
            padding: 0.5rem 1.5rem;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(255, 69, 0, 0.3);
            transition: all 0.3s ease;
        }

        .btn-signup:hover {
            box-shadow: 0 6px 20px rgba(255, 69, 0, 0.5);
            transform: translateY(-2px);
        }

        .navbar-toggler {
            border: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            padding: 0.25rem 0.5rem;
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: none;
        }

        @media(max-width:991px) {
            .custom-navbar .d-flex.align-items-center {
                margin-top: 1rem;
                justify-content: space-between;
                width: 100%;
            }
        }

        /* Banner Hero */
        .category-hero {
            position: relative;
            background: linear-gradient(rgba(11, 11, 11, 0.8), rgba(11, 11, 11, 0.95)), url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            padding: 5rem 0 4rem;
            border-bottom: 3px solid var(--accent-primary);
            text-align: left;
        }

        .category-hero .hero-badge {
            background: rgba(255, 69, 0, 0.2);
            color: var(--accent-primary);
            border: 1px solid var(--accent-primary);
            font-weight: 700;
            font-size: 0.85rem;
            padding: 0.3rem 1.2rem;
            border-radius: 50px;
            display: inline-block;
        }

        .category-hero h1 {
            font-size: 2.8rem;
            font-weight: 900;
            line-height: 1.2;
            margin: 1rem 0;
            color: var(--text-primary);
        }

        .category-hero h1 span {
            background: linear-gradient(135deg, var(--accent-primary), #FFB366);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .category-hero .lead {
            color: var(--text-secondary);
            font-size: 1.1rem;
            max-width: 650px;
            margin-bottom: 1.5rem;
        }

        .btn-explore {
            background: var(--accent-primary);
            color: #fff;
            font-weight: 800;
            padding: 0.9rem 2.2rem;
            border-radius: 12px;
            border: none;
            font-size: 1.05rem;
            box-shadow: 0 8px 25px rgba(255, 69, 0, 0.35);
            transition: all 0.3s ease;
            display: inline-block;
        }

        .btn-explore:hover {
            background: #e03e00;
            transform: translateY(-2px);
            color: #fff;
        }

        /* Review Section */
        .review-section {
            padding: 4rem 0;
        }

        .section-intro {
            border-left: 4px solid var(--accent-primary);
            padding-left: 1.5rem;
            margin-bottom: 2.5rem;
        }

        .section-intro h2 {
            font-weight: 800;
            font-size: 2rem;
            margin-bottom: 0.5rem;
        }

        .section-intro p {
            color: var(--text-secondary);
        }

        .review-card {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: 16px;
            padding: 1.8rem;
            margin-bottom: 1.5rem;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }

        .review-card:hover {
            border-color: var(--accent-primary);
            box-shadow: 0 10px 20px rgba(255, 69, 0, 0.1);
            transform: translateY(-3px);
        }

        .review-header {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .review-rank {
            background: var(--accent-primary);
            color: #fff;
            font-weight: 800;
            font-size: 1.2rem;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
        }

        .review-title {
            font-weight: 800;
            font-size: 1.3rem;
            flex: 1;
        }

        .review-badge {
            background: rgba(255, 69, 0, 0.2);
            color: var(--accent-primary);
            padding: 0.25rem 0.8rem;
            border-radius: 20px;
            font-weight: 700;
            font-size: 0.8rem;
        }

        .review-body {
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .review-stats {
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
            border-top: 1px solid var(--border-dark);
            padding-top: 1rem;
        }

        .stat-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .stat-icon {
            color: var(--accent-primary);
            font-size: 1.2rem;
        }

        /* Comparison Table */
        .compare-section {
            padding: 3rem 0;
            background: var(--bg-secondary);
            border-radius: 20px;
            margin: 2rem 0;
        }

        .table-custom {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0 8px;
        }

        .table-custom th {
            color: var(--accent-primary);
            font-weight: 700;
            padding: 0.8rem;
            border-bottom: 2px solid var(--border-dark);
        }

        .table-custom td {
            padding: 1rem 0.8rem;
            background: var(--card-bg);
            color: var(--text-secondary);
            vertical-align: middle;
        }

        .table-custom tr td:first-child {
            border-radius: 12px 0 0 12px;
            font-weight: 700;
            color: #fff;
        }

        .table-custom tr td:last-child {
            border-radius: 0 12px 12px 0;
        }

        .btn-detail {
            background: transparent;
            border: 1px solid var(--accent-primary);
            color: var(--accent-primary);
            font-weight: 700;
            padding: 0.3rem 1rem;
            border-radius: 8px;
            font-size: 0.9rem;
            transition: 0.2s;
        }

        .btn-detail:hover {
            background: var(--accent-primary);
            color: #fff;
        }

        /* FAQ */
        .faq-section {
            padding: 3rem 0;
        }

        .accordion-button {
            background: var(--card-bg);
            color: #fff;
            font-weight: 700;
            border-radius: 12px;
            padding: 1.2rem 1.5rem;
            border: 1px solid var(--border-dark);
        }

        .accordion-button:not(.collapsed) {
            background: var(--accent-primary);
            color: #fff;
            box-shadow: none;
            border-color: var(--accent-primary);
        }

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

        .accordion-body {
            background: var(--card-bg);
            color: var(--text-secondary);
            border: 1px solid var(--border-dark);
            border-top: none;
            border-radius: 0 0 12px 12px;
        }

        /* Footer */
        .footer-section {
            background: var(--bg-secondary);
            border-top: 2px solid var(--border-dark);
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }

        .footer-brand {
            font-weight: 800;
            font-size: 1.3rem;
        }

        .footer-link {
            color: var(--text-secondary);
            transition: 0.2s;
        }

        .footer-link:hover {
            color: var(--accent-primary);
        }

        .copyright {
            border-top: 1px solid var(--border-dark);
            margin-top: 2rem;
            padding-top: 1.5rem;
            color: #666;
            font-size: 0.9rem;
        }

        @media(max-width:768px) {
            .category-hero h1 {
                font-size: 2rem;
            }
            .review-card {
                flex-direction: column;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0B0B0B;
            --bg-secondary: #161616;
            --accent-primary: #FF4500;
            --accent-secondary: #FF0000;
            --text-primary: #FFFFFF;
            --text-secondary: #CCCCCC;
            --border-dark: #2A2A2A;
            --card-bg: #1C1C1C;
            --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-body: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            padding-left: 40px;
            padding-right: 40px;
        }
        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Custom Navbar */
        .custom-navbar {
            background: rgba(11, 11, 11, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-dark);
            padding: 0.8rem 0;
            transition: all 0.3s ease;
            z-index: 1050;
        }
        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.4rem;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }
        .navbar-brand span {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .navbar-nav .nav-link {
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.6rem 1.2rem;
            border-radius: 8px;
            margin: 0 0.15rem;
            transition: all 0.2s ease;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--text-primary);
            background: rgba(255, 69, 0, 0.15);
        }
        .btn-login {
            background: transparent;
            color: var(--text-primary);
            border: 2px solid var(--border-dark);
            font-weight: 700;
            padding: 0.5rem 1.3rem;
            border-radius: 10px;
            transition: all 0.3s ease;
        }
        .btn-login:hover {
            border-color: var(--accent-primary);
            color: var(--accent-primary);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
            border: none;
            font-weight: 700;
            padding: 0.5rem 1.5rem;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(255, 69, 0, 0.3);
            transition: all 0.3s ease;
        }
        .btn-signup:hover {
            box-shadow: 0 6px 20px rgba(255, 69, 0, 0.5);
            transform: translateY(-2px);
        }
        .navbar-toggler {
            border: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            padding: 0.25rem 0.5rem;
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: none;
        }
        @media (max-width: 992px) {
            .custom-navbar .d-flex.align-items-center {
                margin-top: 1rem;
                justify-content: flex-start;
                width: 100%;
            }
        }

        /* Page Inner Banner */
        .inner-banner {
            background: linear-gradient(rgba(11, 11, 11, 0.7), rgba(11, 11, 11, 0.85)), url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            padding: 7rem 0 3.5rem;
            border-bottom: 2px solid var(--accent-primary);
            position: relative;
        }
        .inner-banner h1 {
            font-size: 2.8rem;
            font-weight: 900;
            line-height: 1.2;
        }
        .inner-banner h1 span {
            background: linear-gradient(135deg, var(--accent-primary), #FFB366);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .inner-banner .lead {
            color: var(--text-secondary);
            max-width: 700px;
            font-size: 1.1rem;
            line-height: 1.7;
        }

        /* Step Cards */
        .step-card {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: 16px;
            padding: 2rem 1.5rem;
            transition: all 0.3s ease;
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .step-card:hover {
            border-color: var(--accent-primary);
            box-shadow: 0 12px 30px rgba(255, 69, 0, 0.2);
        }
        .step-number {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            font-weight: 900;
            font-size: 3.5rem;
            line-height: 1;
            opacity: 0.8;
        }
        .step-icon {
            font-size: 2.2rem;
            color: var(--accent-primary);
            margin-bottom: 0.8rem;
        }
        .step-card h5 {
            font-weight: 800;
            font-size: 1.25rem;
            margin-bottom: 0.8rem;
        }
        .step-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        /* OS Comparison */
        .os-card {
            background: var(--card-bg);
            border: 2px solid var(--border-dark);
            border-radius: 20px;
            padding: 2rem;
            text-align: center;
            transition: 0.3s ease;
        }
        .os-card:hover {
            border-color: var(--accent-primary);
            box-shadow: 0 15px 35px rgba(255, 69, 0, 0.2);
            transform: translateY(-4px);
        }
        .os-card i {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            color: var(--accent-primary);
        }
        .os-card h4 {
            font-weight: 800;
        }

        /* Benefit Block */
        .benefit-item {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        .benefit-icon {
            background: rgba(255, 69, 0, 0.15);
            color: var(--accent-primary);
            border-radius: 10px;
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            flex-shrink: 0;
        }

        /* FAQ */
        .accordion-button {
            background-color: var(--card-bg) !important;
            color: var(--text-primary) !important;
            font-weight: 700;
            border: 1px solid var(--border-dark);
            border-radius: 12px !important;
            padding: 1.2rem 1.5rem;
        }
        .accordion-button:not(.collapsed) {
            background-color: var(--card-bg) !important;
            border-color: var(--accent-primary) !important;
            box-shadow: 0 4px 15px rgba(255, 69, 0, 0.2);
        }
        .accordion-button::after {
            filter: brightness(3);
        }
        .accordion-body {
            background-color: var(--card-bg);
            color: var(--text-secondary);
            border: 1px solid var(--border-dark);
            border-top: none;
            border-radius: 0 0 12px 12px;
            padding: 1.2rem 1.5rem;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, rgba(255, 69, 0, 0.15), rgba(255, 0, 0, 0.1));
            border-radius: 24px;
            padding: 3rem;
            border: 1px solid rgba(255, 69, 0, 0.4);
            margin: 3rem 0;
        }
        .btn-cta {
            background: var(--accent-primary);
            color: #fff;
            font-weight: 800;
            padding: 0.9rem 2.8rem;
            border-radius: 14px;
            border: none;
            box-shadow: 0 8px 25px rgba(255, 69, 0, 0.45);
            transition: 0.3s;
            font-size: 1.1rem;
        }
        .btn-cta:hover {
            background: #e03e00;
            transform: scale(1.02);
            color: #fff;
            box-shadow: 0 12px 32px rgba(255, 69, 0, 0.6);
        }

        /* Footer */
        .footer-section {
            background: var(--bg-secondary);
            border-top: 2px solid var(--border-dark);
            padding: 3.5rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-brand {
            font-weight: 800;
            font-size: 1.3rem;
            color: var(--text-primary);
        }
        .footer-link {
            color: var(--text-secondary);
            transition: color 0.2s;
            line-height: 2;
        }
        .footer-link:hover {
            color: var(--accent-primary);
        }
        .copyright {
            border-top: 1px solid var(--border-dark);
            padding-top: 1.5rem;
            margin-top: 2rem;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        /* FAB (Volcanic Magma Style - Option 2) */
        .fab-neon {
            position: fixed;
            left: 1rem;
            bottom: 5rem;
            z-index: 1055;
            background: rgba(11, 11, 11, 0.7);
            backdrop-filter: blur(8px);
            border: 1.5px solid transparent;
            background-clip: padding-box;
            border-radius: 50px;
            padding: 0.55rem 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--text-primary);
            font-weight: 700;
            box-shadow: 0 0 18px rgba(255, 69, 0, 0.55);
            transition: 0.3s;
            text-decoration: none;
            border-image: linear-gradient(135deg, #FF4500, #FF0000) 1;
        }
        .fab-neon:hover {
            box-shadow: 0 0 28px rgba(255, 69, 0, 0.8);
            color: #fff;
            transform: scale(1.05);
        }
        .fab-notify {
            width: 10px;
            height: 10px;
            background: #FF0000;
            border-radius: 50%;
            margin-right: 0.2rem;
            animation: blink 1.2s infinite;
        }
        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #0B0B0B;
            --bg-secondary: #161616;
            --accent-primary: #FF4500;
            --accent-secondary: #FF0000;
            --text-primary: #FFFFFF;
            --text-secondary: #CCCCCC;
            --border-dark: #2A2A2A;
            --card-bg: #1C1C1C;
            --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-body: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

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

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

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

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

        @media (min-width: 1200px) {
            .container {
                padding-left: 40px;
                padding-right: 40px;
            }
        }

        /* Custom Navbar */
        .custom-navbar {
            background: rgba(11, 11, 11, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-dark);
            padding: 0.8rem 0;
            transition: all 0.3s ease;
        }

        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.4rem;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }

        .navbar-brand span {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .navbar-nav .nav-link {
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.6rem 1.2rem;
            border-radius: 8px;
            margin: 0 0.15rem;
            transition: all 0.2s ease;
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--text-primary);
            background: rgba(255, 69, 0, 0.15);
        }

        .btn-login {
            background: transparent;
            color: var(--text-primary);
            border: 2px solid var(--border-dark);
            font-weight: 700;
            padding: 0.5rem 1.3rem;
            border-radius: 10px;
            transition: all 0.3s ease;
        }

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

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
            border: none;
            font-weight: 700;
            padding: 0.5rem 1.5rem;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(255, 69, 0, 0.3);
            transition: all 0.3s ease;
        }

        .btn-signup:hover {
            box-shadow: 0 6px 20px rgba(255, 69, 0, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }

        .navbar-toggler {
            border: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            padding: 0.25rem 0.5rem;
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: none;
        }

        @media (max-width: 991.98px) {
            .custom-navbar .d-flex.align-items-center {
                margin-top: 1rem;
                justify-content: space-between;
                width: 100%;
            }
        }

        /* Category Hero - Trial/Application Style */
        .category-hero {
            position: relative;
            background: linear-gradient(rgba(11, 11, 11, 0.8), rgba(11, 11, 11, 0.95)), 
                        url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            min-height: 85vh;
            display: flex;
            align-items: center;
            padding: 6rem 0 5rem;
            border-bottom: 2px solid var(--accent-primary);
        }

        .hero-badge {
            background: rgba(255, 69, 0, 0.2);
            color: var(--accent-primary);
            border: 1px solid var(--accent-primary);
            font-weight: 700;
            font-size: 0.9rem;
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            display: inline-block;
            letter-spacing: 1px;
        }

        .hero-title {
            font-size: 3.2rem;
            font-weight: 900;
            line-height: 1.2;
            margin: 1.2rem 0;
        }

        .hero-title span {
            background: linear-gradient(135deg, var(--accent-primary), #FFB366);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 620px;
            line-height: 1.7;
            margin-bottom: 2rem;
        }

        .hero-perks {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .hero-perk-item {
            background: rgba(22, 22, 22, 0.8);
            backdrop-filter: blur(8px);
            border: 1px solid var(--border-dark);
            border-left: 3px solid var(--accent-primary);
            padding: 0.8rem 1.2rem;
            border-radius: 10px;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 600;
            color: var(--text-secondary);
            transition: all 0.3s ease;
        }

        .hero-perk-item:hover {
            border-color: var(--accent-primary);
            color: var(--text-primary);
            background: rgba(255, 69, 0, 0.1);
        }

        .hero-perk-item i {
            color: var(--accent-primary);
            font-size: 1.3rem;
        }

        .btn-hero-primary {
            background: var(--accent-primary);
            color: #fff;
            font-weight: 800;
            padding: 0.85rem 2.2rem;
            border-radius: 12px;
            border: none;
            font-size: 1.1rem;
            box-shadow: 0 8px 25px rgba(255, 69, 0, 0.4);
            transition: all 0.3s ease;
        }

        .btn-hero-primary:hover {
            background: #e03e00;
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(255, 69, 0, 0.6);
            color: #fff;
        }

        .hero-mockup {
            background: var(--card-bg);
            border: 2px solid var(--border-dark);
            border-radius: 20px;
            padding: 1.5rem;
            box-shadow: 0 20px 40px rgba(255, 69, 0, 0.15);
        }

        .hero-stat {
            border-left: 3px solid var(--accent-primary);
            padding-left: 1rem;
        }

        .hero-stat h4 {
            color: var(--accent-primary);
            font-weight: 800;
            margin-bottom: 0.3rem;
        }

        /* Section Common */
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
        }

        .section-subtitle {
            color: var(--text-secondary);
            font-size: 1.1rem;
            max-width: 650px;
            line-height: 1.7;
            margin-bottom: 3rem;
        }

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

        /* Promo Cards */
        .promo-card {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: 16px;
            padding: 1.8rem;
            transition: all 0.3s ease;
            height: 100%;
            position: relative;
            overflow: hidden;
        }

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

        .promo-card:hover {
            border-color: var(--accent-primary);
            box-shadow: 0 10px 25px rgba(255, 69, 0, 0.15);
            transform: translateY(-4px);
        }

        .promo-badge {
            position: absolute;
            top: 15px;
            right: 15px;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.25rem 0.9rem;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }

        .promo-icon {
            font-size: 2rem;
            color: var(--accent-primary);
            margin-bottom: 1rem;
        }

        .promo-title {
            font-weight: 700;
            font-size: 1.3rem;
            margin-bottom: 0.7rem;
        }

        .promo-value {
            font-size: 1.8rem;
            font-weight: 900;
            color: var(--accent-primary);
            margin-bottom: 0.3rem;
        }

        .promo-desc {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
        }

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

        .step-item {
            display: flex;
            gap: 1.5rem;
            margin-bottom: 2rem;
            align-items: flex-start;
        }

        .step-number {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #fff;
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.3rem;
            flex-shrink: 0;
        }

        .step-content h6 {
            font-weight: 700;
            margin-bottom: 0.3rem;
        }

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

        /* Testimonials / Social Proof */
        .testimonial-card {
            background: var(--card-bg);
            border: 1px solid var(--border-dark);
            border-radius: 16px;
            padding: 1.8rem;
            height: 100%;
        }

        .testimonial-text {
            color: var(--text-secondary);
            font-style: italic;
            margin-bottom: 1.2rem;
            line-height: 1.6;
        }

        .testimonial-user {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            font-weight: 700;
            color: var(--text-primary);
        }

        .testimonial-user img {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            object-fit: cover;
            border: 2px solid var(--accent-primary);
        }

        /* FAQ */
        .accordion-item {
            background: transparent;
            border: 1px solid var(--border-dark);
            border-radius: 12px !important;
            margin-bottom: 0.8rem;
            overflow: hidden;
        }

        .accordion-button {
            background: var(--card-bg);
            color: var(--text-primary);
            font-weight: 700;
            box-shadow: none;
            padding: 1.2rem 1.5rem;
            border-radius: 12px !important;
        }

        .accordion-button:not(.collapsed) {
            background: var(--card-bg);
            color: var(--accent-primary);
            border-bottom: 1px solid var(--border-dark);
        }

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

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

        .accordion-body {
            background: var(--card-bg);
            color: var(--text-secondary);
            padding: 1.2rem 1.5rem;
        }

        /* Sticky Bottom Bar */
        .sticky-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            background: rgba(11, 11, 11, 0.98);
            backdrop-filter: blur(12px);
            border-top: 2px solid var(--accent-primary);
            padding: 0.8rem 0;
            z-index: 1040;
            display: none;
        }

        @media (max-width: 767.98px) {
            .sticky-cta {
                display: block;
            }
        }

        /* Left FAB (Volcanic Magma & Obsidian - Cyber/Neon Style) */
        .fab-left {
            position: fixed;
            left: 24px;
            bottom: 96px;
            z-index: 1050;
            width: 56px;
            height: 56px;
            border-radius: 64px;
            background: rgba(11, 11, 11, 0.75);
            backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 18px rgba(255, 69, 0, 0.5);
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .fab-left::before {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            border-radius: 64px;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            z-index: -1;
        }

        .fab-left i {
            font-size: 1.6rem;
            color: var(--text-primary);
            transition: all 0.3s ease;
        }

        .fab-left:hover {
            box-shadow: 0 0 28px rgba(255, 69, 0, 0.8);
            transform: scale(1.08);
        }

        .fab-left:hover i {
            color: var(--accent-primary);
        }

        /* Footer */
        .footer-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-dark);
            padding: 4rem 0 1rem;
        }

        .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
        }

        .footer-link {
            color: var(--text-secondary);
            transition: color 0.2s;
            font-size: 0.9rem;
            display: inline-block;
            margin-bottom: 0.3rem;
        }

        .footer-link:hover {
            color: var(--accent-primary);
        }

        .copyright {
            border-top: 1px solid var(--border-dark);
            margin-top: 2rem;
            padding-top: 1.5rem;
            color: var(--text-secondary);
            font-size: 0.85rem;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.2rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .hero-perks {
                flex-direction: column;
            }
        }