/* roulang page: index */
:root {
            --primary-color: #007bff;
            --secondary-color: #6c757d;
            --background-color: #f8f9fa;
            --text-color: #212529;
            --muted-text-color: #495057;
            --border-color: #dee2e6;
            --card-background: #ffffff;
            --border-radius: 8px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
            --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
            --spacing-unit: 1rem;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--background-color);
            scroll-behavior: smooth;
        }

        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: color 0.2s ease-in-out;
        }

        a:hover {
            color: #0056b3;
            text-decoration: underline;
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-unit);
        }

        .btn {
            display: inline-block;
            padding: 0.75rem 1.5rem;
            border: none;
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-weight: 500;
            cursor: pointer;
            transition: background-color 0.2s ease-in-out, transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
            text-align: center;
        }

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

        .btn-primary:hover {
            background-color: #0056b3;
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
            text-decoration: none;
        }

        .btn-secondary {
            background-color: var(--secondary-color);
            color: #fff;
        }

        .btn-secondary:hover {
            background-color: #545b62;
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
            text-decoration: none;
        }

        /* Header & Navigation */
        header {
            background-color: var(--card-background);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-unit) 0;
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--primary-color);
            text-decoration: none;
        }

        .logo:hover {
            text-decoration: none;
        }

        .nav-links {
            list-style: none;
            display: flex;
            gap: var(--spacing-unit);
        }

        .nav-links li a {
            font-weight: 500;
            color: var(--muted-text-color);
            padding: 0.5rem;
            border-radius: var(--border-radius);
            transition: background-color 0.2s ease-in-out, color 0.2s ease-in-out;
        }

        .nav-links li a:hover,
        .nav-links li a.active {
            background-color: var(--primary-color);
            color: #fff;
            text-decoration: none;
        }

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

        /* Hero Section */
        .hero {
            background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            color: #fff;
            text-align: center;
            padding: 5rem var(--spacing-unit);
            min-height: 60vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            position: relative;
        }

        .hero h1 {
            font-size: 3rem;
            margin-bottom: var(--spacing-unit);
            line-height: 1.2;
        }

        .hero p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            max-width: 700px;
            color: rgba(255, 255, 255, 0.9);
        }

        /* Section Styling */
        .section {
            padding: 4rem 0;
        }

        .section h2 {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 3rem;
        }

        /* Card Styling */
        .card {
            background-color: var(--card-background);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
            display: flex;
            flex-direction: column;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 12px rgba(0, 0, 0, 0.15);
        }

        .card-img-top {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-color);
        }

        .card-body {
            padding: var(--spacing-unit);
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .card-title {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
            color: var(--text-color);
        }

        .card-text {
            font-size: 0.95rem;
            color: var(--muted-text-color);
            flex-grow: 1;
            margin-bottom: var(--spacing-unit);
        }

        .card-link {
            display: block;
            margin-top: auto;
            text-align: right;
            font-weight: 500;
        }

        /* Grid Layout */
        .grid-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: var(--spacing-unit) var(--spacing-unit);
        }

        /* Latest Updates Section */
        .latest-updates .card-title {
            font-size: 1.1rem;
        }
        .latest-updates .card-text {
            font-size: 0.9rem;
        }
        .latest-updates .card-link {
            font-size: 0.9rem;
        }

        /* Category Section */
        .category-card {
            text-align: center;
            padding: 2rem var(--spacing-unit);
            background-color: var(--card-background);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-sm);
            transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
        }

        .category-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }

        .category-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }

        .category-card h3 {
            font-size: 1.4rem;
            margin-bottom: 0.5rem;
        }

        .category-card p {
            font-size: 0.95rem;
            color: var(--muted-text-color);
        }

        /* FAQ Section */
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: var(--spacing-unit) 0;
        }

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

        .faq-question {
            font-size: 1.1rem;
            font-weight: 500;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: color 0.2s ease-in-out;
        }

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

        .faq-question::after {
            content: '+';
            font-size: 1.2rem;
            transition: transform 0.2s ease-in-out;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-in-out, padding 0.3s ease-in-out;
            font-size: 0.95rem;
            color: var(--muted-text-color);
            padding-top: 0;
        }

        .faq-item.open .faq-answer {
            max-height: 200px; /* Adjust as needed */
            padding-top: var(--spacing-unit);
        }

        .faq-item.open .faq-question::after {
            transform: rotate(45deg);
        }

        /* CTA Section */
        .cta {
            background-color: var(--primary-color);
            color: #fff;
            text-align: center;
            padding: 4rem var(--spacing-unit);
            position: relative;
            overflow: hidden;
        }

        .cta h2 {
            font-size: 2.2rem;
            margin-bottom: 1.5rem;
        }

        .cta p {
            font-size: 1.1rem;
            margin-bottom: 2rem;
            color: rgba(255, 255, 255, 0.9);
        }

        .cta .btn-primary {
            background-color: #fff;
            color: var(--primary-color);
            font-weight: 600;
            padding: 1rem 2rem;
        }
        .cta .btn-primary:hover {
            background-color: #eee;
            color: #003f7f;
        }

        /* Footer */
        footer {
            background-color: #343a40;
            color: rgba(255, 255, 255, 0.7);
            padding: 3rem 0 2rem;
            text-align: center;
            font-size: 0.9rem;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-unit) var(--spacing-unit);
            margin-bottom: 2rem;
        }

        .footer-logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }

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

        .footer-nav ul li a {
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 0.5rem;
            display: inline-block;
        }

        .footer-nav ul li a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .copyright {
            margin-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
            padding-top: 1.5rem;
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
            .section h2 {
                font-size: 2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: var(--card-background);
                box-shadow: var(--shadow-md);
                padding: var(--spacing-unit);
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links li {
                margin-bottom: var(--spacing-unit);
            }
            .mobile-nav-toggle {
                display: block;
            }
            .hero {
                padding: 3rem var(--spacing-unit);
                min-height: 40vh;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .section {
                padding: 3rem 0;
            }
            .cta h2 {
                font-size: 1.8rem;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: article */
:root {
            --primary-color: #1a73e8;
            --secondary-color: #fbbc04;
            --background-color: #f8f9fa;
            --text-color: #333;
            --light-text-color: #6c757d;
            --border-color: #dee2e6;
            --card-background: #ffffff;
            --footer-background: #343a40;
            --footer-text-color: #adb5bd;
            --footer-link-color: #ffffff;
            --rounded-lg: 8px;
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
            --container-width: 1200px;
            --spacing-md: 24px;
            --spacing-lg: 48px;
        }

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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: var(--background-color);
        }

        .container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        a:hover {
            color: #0f4ab2;
        }

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

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

        h1, h2, h3, h4 {
            margin-bottom: var(--spacing-md);
            line-height: 1.3;
        }

        h1 { font-size: 2.5rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.75rem; }
        h4 { font-size: 1.5rem; }

        .section {
            padding: var(--spacing-lg) 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: var(--spacing-lg);
            font-size: 2.2rem;
            color: var(--primary-color);
        }
        
        .section-subtitle {
            text-align: center;
            color: var(--light-text-color);
            font-size: 1.1rem;
            margin-bottom: var(--spacing-lg);
        }

        /* Header & Navigation */
        header {
            background-color: var(--card-background);
            box-shadow: var(--shadow-md);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        header nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: var(--primary-color);
        }

        .nav-links {
            list-style: none;
            display: flex;
        }

        .nav-links li {
            margin-left: var(--spacing-md);
        }

        .nav-links a {
            color: var(--text-color);
            font-weight: 500;
            padding: 8px 16px;
            border-radius: var(--rounded-lg);
            transition: background-color 0.3s ease, color 0.3s ease;
        }

        .nav-links a.active {
            background-color: var(--primary-color);
            color: #ffffff;
        }

        .nav-links a:hover {
            background-color: var(--primary-color);
            color: #ffffff;
        }

        .mobile-nav-toggle {
            display: none;
            font-size: 1.8rem;
            color: var(--text-color);
        }

        /* Hero Section */
        .hero {
            background-color: var(--card-background);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            color: #ffffff;
            text-align: center;
            padding: 100px 0;
            position: relative;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
        }

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

        .hero h1 {
            font-size: 3rem;
            margin-bottom: var(--spacing-md);
        }

        .hero p {
            font-size: 1.2rem;
            margin-bottom: var(--spacing-lg);
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-button {
            display: inline-block;
            background-color: var(--secondary-color);
            color: var(--text-color);
            padding: 15px 30px;
            font-size: 1.1rem;
            font-weight: bold;
            border-radius: var(--rounded-lg);
            transition: background-color 0.3s ease, transform 0.3s ease;
            box-shadow: var(--shadow-md);
        }

        .cta-button:hover {
            background-color: #e0a900;
            transform: translateY(-2px);
        }

        /* Article Content */
        .article-section {
            background-color: var(--card-background);
            padding: var(--spacing-lg) 0;
            border-radius: var(--rounded-lg);
            box-shadow: var(--shadow-md);
            margin-top: var(--spacing-lg);
        }

        .article-content h1 {
            font-size: 2.5rem;
            color: var(--primary-color);
            text-align: center;
        }

        .article-meta {
            text-align: center;
            color: var(--light-text-color);
            margin-bottom: var(--spacing-lg);
            font-size: 0.9rem;
        }

        .article-meta span {
            margin: 0 10px;
        }

        .article-body {
            font-size: 1.1rem;
            line-height: 1.9;
            color: var(--text-color);
            max-width: 800px;
            margin: 0 auto;
        }

        .article-body p {
            margin-bottom: var(--spacing-md);
        }
        
        .article-body h2, .article-body h3 {
            color: var(--primary-color);
            margin-top: var(--spacing-lg);
        }

        .article-body ul, .article-body ol {
            margin-left: 30px;
            margin-bottom: var(--spacing-md);
        }

        .article-body img {
            margin: var(--spacing-md) auto;
            border-radius: var(--rounded-lg);
            box-shadow: var(--shadow-md);
        }
        
        .no-content {
            text-align: center;
            padding: var(--spacing-lg) 0;
            font-size: 1.2rem;
            color: var(--light-text-color);
        }
        
        .no-content a {
            display: inline-block;
            margin-top: var(--spacing-md);
            padding: 10px 20px;
            background-color: var(--primary-color);
            color: white;
            border-radius: var(--rounded-lg);
        }
        
        .no-content a:hover {
            background-color: #0f4ab2;
        }

        /* Footer */
        footer {
            background-color: var(--footer-background);
            color: var(--footer-text-color);
            padding: var(--spacing-lg) 0;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }

        .footer-logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: #ffffff;
            margin-bottom: var(--spacing-md);
        }

        .footer-nav h4, .footer-content > div:not(:first-child) h4 {
            color: #ffffff;
            margin-bottom: var(--spacing-md);
            font-size: 1.2rem;
        }

        .footer-nav ul {
            list-style: none;
        }

        .footer-nav li {
            margin-bottom: 10px;
        }

        .footer-nav a {
            color: var(--footer-text-color);
            transition: color 0.3s ease;
        }

        .footer-nav a:hover {
            color: var(--footer-link-color);
        }
        
        .footer-content > div:nth-child(2) ul li {
             margin-bottom: 10px;
        }
        
        .footer-content > div:nth-child(2) ul li a {
            color: var(--footer-text-color);
        }
        
        .footer-content > div:nth-child(2) ul li a:hover {
            color: var(--footer-link-color);
        }

        .copyright {
            text-align: center;
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
        }

        /* Responsive */
        @media (max-width: 992px) {
            .container {
                padding: 0 20px;
            }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.75rem; }
            .hero h1 { font-size: 2.5rem; }
            .hero p { font-size: 1rem; }
            .section-title { font-size: 1.8rem; }
        }

        @media (max-width: 768px) {
            header nav {
                height: 60px;
            }
            .nav-links {
                display: none; /* Hidden by default on mobile */
            }
            .mobile-nav-toggle {
                display: block;
            }
            .hero {
                padding: 80px 0;
            }
            .article-content h1 {
                font-size: 2rem;
            }
            .article-body {
                font-size: 1rem;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 520px) {
            h1 { font-size: 1.8rem; }
            .hero h1 { font-size: 2rem; }
            .hero {
                padding: 60px 0;
            }
            .hero p {
                font-size: 0.9rem;
            }
            .cta-button {
                padding: 12px 25px;
                font-size: 1rem;
            }
            .section {
                padding: 40px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .article-content h1 {
                font-size: 1.75rem;
            }
            .article-meta {
                font-size: 0.8rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary-color: #ff4500;
            --secondary-color: #ff8c00;
            --background-color: #1a1a1a;
            --text-color: #ffffff;
            --subtle-text-color: #cccccc;
            --border-color: #333333;
            --card-background: #252525;
            --hover-color: #ff6f00;
            --button-text: #ffffff;
            --footer-background: #111111;
            --font-family: 'Microsoft YaHei', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --container-max-width: 1200px;
            --spacing-unit: 16px;
            --border-radius: 8px;
            --shadow-normal: 0 4px 8px rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 6px 12px rgba(255, 69, 0, 0.4);
            --transition-speed: 0.3s;
        }

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

        body {
            font-family: var(--font-family);
            background-color: var(--background-color);
            color: var(--text-color);
            line-height: 1.7;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        .container {
            max-width: var(--container-max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-unit);
            width: 100%;
        }

        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: color var(--transition-speed) ease;
        }

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

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

        /* Header & Navigation */
        header {
            background-color: var(--card-background);
            padding: var(--spacing-unit) 0;
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        nav.container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.8em;
            font-weight: bold;
            color: var(--primary-color);
            text-transform: uppercase;
        }

        .nav-links {
            list-style: none;
            display: flex;
        }

        .nav-links li {
            margin-left: calc(var(--spacing-unit) * 2);
        }

        .nav-links a {
            color: var(--subtle-text-color);
            font-size: 1.1em;
            padding: 0.5em 0;
            position: relative;
            transition: color var(--transition-speed) ease;
        }

        .nav-links a.active {
            color: var(--primary-color);
            font-weight: bold;
        }

        .nav-links a.active::after,
        .nav-links a:not(.active):hover::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--primary-color);
            transition: width var(--transition-speed) ease;
        }

        .nav-links a:not(.active):hover::after {
            width: 50%;
            left: 25%;
        }

        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-color);
            font-size: 1.8em;
            cursor: pointer;
        }

        /* Hero Section */
        .hero {
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            color: var(--text-color);
            text-align: center;
            padding: calc(var(--spacing-unit) * 8) var(--spacing-unit);
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.6);
            z-index: 1;
        }

        .hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }

        .hero h1 {
            font-size: 3em;
            margin-bottom: var(--spacing-unit);
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
        }

        .hero p {
            font-size: 1.3em;
            margin-bottom: calc(var(--spacing-unit) * 3);
            color: var(--subtle-text-color);
            text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
        }

        .cta-button {
            display: inline-block;
            background-color: var(--primary-color);
            color: var(--button-text);
            padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);
            border-radius: var(--border-radius);
            font-size: 1.2em;
            font-weight: bold;
            text-transform: uppercase;
            box-shadow: var(--shadow-normal);
            transition: background-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease, transform var(--transition-speed) ease;
        }

        .cta-button:hover {
            background-color: var(--hover-color);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        /* Content Section */
        .content-section {
            padding: calc(var(--spacing-unit) * 6) 0;
        }

        .section-title {
            font-size: 2.5em;
            text-align: center;
            margin-bottom: calc(var(--spacing-unit) * 4);
            font-weight: bold;
        }

        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: calc(var(--spacing-unit) * 3);
        }

        .video-card {
            background-color: var(--card-background);
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow-normal);
            transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
            display: flex;
            flex-direction: column;
        }

        .video-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .video-card img {
            width: 100%;
            height: 200px; /* Fixed height for consistency */
            object-fit: cover; /* Ensure image covers the area */
        }

        .video-card-content {
            padding: var(--spacing-unit);
            flex-grow: 1; /* Allow content to grow */
            display: flex;
            flex-direction: column;
            justify-content: space-between; /* Push description to bottom if needed */
        }

        .video-card h3 {
            font-size: 1.3em;
            margin-bottom: var(--spacing-unit);
            color: var(--primary-color);
            flex-grow: 1; /* Allow title to take space */
        }

        .video-card p {
            font-size: 0.95em;
            color: var(--subtle-text-color);
            display: -webkit-box;
            -webkit-line-clamp: 3; /* Limit lines for description */
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: var(--spacing-unit);
        }

        .video-card-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: var(--spacing-unit);
            font-size: 0.9em;
            color: var(--subtle-text-color);
        }

        .video-card-footer .genre {
            background-color: rgba(255, 69, 0, 0.2);
            color: var(--primary-color);
            padding: 4px 8px;
            border-radius: 4px;
            font-size: 0.8em;
        }

        /* FAQ Section */
        .faq-section {
            background-color: var(--card-background);
            padding: calc(var(--spacing-unit) * 6) 0;
        }

        .faq-item {
            margin-bottom: var(--spacing-unit);
            border-bottom: 1px solid var(--border-color);
            padding-bottom: var(--spacing-unit);
        }

        .faq-question {
            font-size: 1.2em;
            font-weight: bold;
            cursor: pointer;
            position: relative;
            padding-left: var(--spacing-unit);
        }

        .faq-question::before,
        .faq-question::after {
            content: '';
            position: absolute;
            background-color: var(--primary-color);
            transition: transform var(--transition-speed) ease;
        }

        .faq-question::before {
            width: 2px;
            height: 12px;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
        }

        .faq-question::after {
            width: 12px;
            height: 2px;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
        }

        .faq-item.open .faq-question::after {
            transform: translateY(-50%) rotate(90deg);
        }

        .faq-answer {
            font-size: 1em;
            color: var(--subtle-text-color);
            padding-left: var(--spacing-unit);
            margin-top: var(--spacing-unit);
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-speed) ease-out, opacity var(--transition-speed) ease-out;
            opacity: 0;
        }

        .faq-item.open .faq-answer {
            max-height: 100px; /* Adjust as needed */
            opacity: 1;
        }

        /* CTA Section */
        .cta-section {
            background-color: var(--primary-color);
            color: var(--text-color);
            text-align: center;
            padding: calc(var(--spacing-unit) * 6) 0;
        }

        .cta-section h2 {
            font-size: 2.5em;
            margin-bottom: var(--spacing-unit);
        }

        .cta-section p {
            font-size: 1.2em;
            margin-bottom: calc(var(--spacing-unit) * 3);
            opacity: 0.9;
        }

        /* Footer */
        footer {
            background-color: var(--footer-background);
            color: var(--subtle-text-color);
            padding: calc(var(--spacing-unit) * 5) 0;
            margin-top: auto; /* Pushes footer to the bottom */
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: calc(var(--spacing-unit) * 2);
        }

        .footer-content h4 {
            color: var(--text-color);
            font-size: 1.3em;
            margin-bottom: calc(var(--spacing-unit) * 2);
        }

        .footer-content ul {
            list-style: none;
        }

        .footer-content li {
            margin-bottom: var(--spacing-unit);
        }

        .footer-content a {
            color: var(--subtle-text-color);
            font-size: 1em;
        }

        .footer-content a:hover {
            color: var(--primary-color);
        }

        .footer-logo {
            font-size: 1.8em;
            font-weight: bold;
            color: var(--primary-color);
            margin-bottom: var(--spacing-unit);
        }

        .copyright {
            text-align: center;
            padding: var(--spacing-unit) 0;
            margin-top: calc(var(--spacing-unit) * 3);
            border-top: 1px solid var(--border-color);
            font-size: 0.9em;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--card-background);
                padding: var(--spacing-unit) 0;
                box-shadow: var(--shadow-normal);
            }

            .nav-links.active {
                display: flex;
            }

            .nav-links li {
                margin: 0;
                text-align: center;
                padding: var(--spacing-unit) 0;
            }

            .mobile-nav-toggle {
                display: block;
            }

            .hero h1 {
                font-size: 2.5em;
            }

            .hero p {
                font-size: 1.1em;
            }

            .section-title {
                font-size: 2em;
            }

            .card-grid {
                grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            }

            .footer-content {
                grid-template-columns: 1fr;
                text-align: center;
            }

            .footer-content div {
                margin-bottom: calc(var(--spacing-unit) * 2);
            }

            .footer-logo {
                font-size: 1.5em;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 2em;
            }
            .hero p {
                font-size: 1em;
            }
            .cta-button {
                padding: calc(var(--spacing-unit) * 1.2) calc(var(--spacing-unit) * 2.5);
                font-size: 1.1em;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .video-card img {
                height: 180px;
            }
            .section-title {
                font-size: 1.8em;
            }
            .cta-section h2 {
                font-size: 2em;
            }
        }

/* roulang page: category2 */
:root {
            --primary-color: #007bff;
            --secondary-color: #6c757d;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --accent-color: #ffc107;
            --background-color: #ffffff;
            --text-color: #333333;
            --muted-text-color: #666666;
            --border-color: #dee2e6;
            --card-bg-color: #ffffff;
            --footer-bg-color: #343a40;
            --footer-text-color: #ffffff;
            --header-bg-color: #ffffff;
            --nav-link-color: #333333;
            --nav-link-hover-color: #007bff;
            --button-bg-color: var(--primary-color);
            --button-text-color: #ffffff;
            --button-hover-bg-color: #0056b3;
            --border-radius: 8px;
            --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --container-max-width: 1200px;
            --spacing-unit: 1rem;
            --section-padding: calc(var(--spacing-unit) * 3);
        }

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

        html {
            font-size: 16px;
            line-height: 1.6;
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Helvetica Neue', Arial, sans-serif;
            color: var(--text-color);
            background-color: var(--background-color);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        a:hover {
            color: var(--button-hover-bg-color);
            text-decoration: underline;
        }

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

        .container {
            max-width: var(--container-max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-unit);
            width: 100%;
        }

        header {
            background-color: var(--header-bg-color);
            padding: var(--spacing-unit) 0;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        header .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: var(--dark-color);
            text-decoration: none;
        }

        .nav-links {
            list-style: none;
            display: flex;
            gap: calc(var(--spacing-unit) * 2);
        }

        .nav-links li a {
            color: var(--nav-link-color);
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
            transition: color 0.3s ease;
        }

        .nav-links li a.active {
            color: var(--primary-color);
            font-weight: 700;
        }

        .nav-links li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: width 0.3s ease;
        }

        .nav-links li a:hover::after {
            width: 100%;
        }

        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 2rem;
            cursor: pointer;
            color: var(--dark-color);
        }

        .hero-section {
            background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            color: #ffffff;
            text-align: center;
            padding: calc(var(--spacing-unit) * 8) var(--spacing-unit);
            position: relative;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
            height: 50px;
            background: linear-gradient(to top, var(--background-color), transparent);
            z-index: 1;
        }

        .hero-section h1 {
            font-size: 3rem;
            margin-bottom: var(--spacing-unit);
            text-shadow: 0 2px 8px rgba(0,0,0,0.5);
        }

        .hero-section p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto var(--spacing-unit);
            text-shadow: 0 1px 5px rgba(0,0,0,0.5);
        }

        .btn {
            display: inline-block;
            background-color: var(--button-bg-color);
            color: var(--button-text-color);
            padding: calc(var(--spacing-unit) * 0.8) calc(var(--spacing-unit) * 2);
            border-radius: var(--border-radius);
            font-size: 1.1rem;
            font-weight: bold;
            transition: background-color 0.3s ease, transform 0.3s ease;
            border: none;
            cursor: pointer;
            box-shadow: var(--box-shadow);
        }

        .btn:hover {
            background-color: var(--button-hover-bg-color);
            transform: translateY(-2px);
            color: var(--button-text-color);
            text-decoration: none;
        }

        .content-section {
            padding: var(--section-padding) 0;
        }

        .content-section h2 {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: calc(var(--spacing-unit) * 2);
            color: var(--dark-color);
        }

        .cards-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: calc(var(--spacing-unit) * 2);
        }

        .card {
            background-color: var(--card-bg-color);
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
        }

        .card img {
            width: 100%;
            height: 200px; /* Fixed height for consistency */
            object-fit: cover;
        }

        .card-content {
            padding: var(--spacing-unit);
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .card-title {
            font-size: 1.3rem;
            margin-bottom: var(--spacing-unit) * 0.5;
            color: var(--dark-color);
            font-weight: 600;
        }

        .card-description {
            font-size: 0.95rem;
            color: var(--muted-text-color);
            margin-bottom: var(--spacing-unit);
            flex-grow: 1;
        }

        .card-meta {
            font-size: 0.85rem;
            color: var(--secondary-color);
            margin-bottom: var(--spacing-unit);
        }

        .card-actions {
            text-align: right;
            margin-top: auto; /* Push to bottom */
        }

        .card-actions .btn {
            padding: 0.5rem 1.2rem;
            font-size: 1rem;
        }

        .faq-section {
            background-color: var(--light-color);
            padding: var(--section-padding) 0;
        }

        .faq-section h2 {
            margin-bottom: calc(var(--spacing-unit) * 2);
        }

        .faq-item {
            margin-bottom: var(--spacing-unit);
            border-radius: var(--border-radius);
            background-color: #ffffff;
            box-shadow: var(--box-shadow);
        }

        .faq-question {
            background-color: var(--card-bg-color);
            padding: calc(var(--spacing-unit) * 1.2);
            font-weight: 600;
            cursor: pointer;
            position: relative;
            border-radius: var(--border-radius) var(--border-radius) 0 0;
        }

        .faq-question::after {
            content: '+';
            position: absolute;
            right: var(--spacing-unit);
            font-size: 1.5rem;
            transition: transform 0.3s ease;
        }

        .faq-item.open .faq-question::after {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: #ffffff;
            border-radius: 0 0 var(--border-radius) var(--border-radius);
            padding: 0 var(--spacing-unit); /* Padding applied when open */
        }

        .faq-item.open .faq-answer {
            max-height: 200px; /* Adjust as needed */
            padding: var(--spacing-unit) var(--spacing-unit);
            border-top: 1px solid var(--border-color);
        }

        .cta-section {
            text-align: center;
            padding: calc(var(--spacing-unit) * 6) 0;
            background-color: var(--primary-color);
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -1px;
            left: 0;
            right: 0;
            height: 50px;
            background: linear-gradient(to bottom, var(--background-color), transparent);
            z-index: 1;
        }

        .cta-section h2 {
            font-size: 2.8rem;
            margin-bottom: var(--spacing-unit);
            color: inherit;
        }

        .cta-section p {
            font-size: 1.2rem;
            margin-bottom: calc(var(--spacing-unit) * 2);
            opacity: 0.9;
        }

        .cta-section .btn {
            background-color: var(--accent-color);
            color: var(--dark-color);
            --button-hover-bg-color: #e0a800;
        }

        .cta-section .btn:hover {
            background-color: var(--button-hover-bg-color);
            color: var(--dark-color);
        }

        footer {
            background-color: var(--footer-bg-color);
            color: var(--footer-text-color);
            padding: calc(var(--spacing-unit) * 4) 0;
            margin-top: auto; /* Pushes footer to bottom */
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: calc(var(--spacing-unit) * 3);
            margin-bottom: calc(var(--spacing-unit) * 3);
        }

        .footer-content h4 {
            font-size: 1.3rem;
            margin-bottom: var(--spacing-unit);
            color: #ffffff;
            font-weight: 600;
        }

        .footer-content p,
        .footer-content ul {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
            list-style: none;
        }

        .footer-content ul li {
            margin-bottom: calc(var(--spacing-unit) * 0.5);
        }

        .footer-content a {
            color: rgba(255, 255, 255, 0.7);
            transition: color 0.3s ease;
        }

        .footer-content a:hover {
            color: #ffffff;
            text-decoration: underline;
        }

        .footer-logo {
            font-size: 2rem;
            font-weight: bold;
            margin-bottom: var(--spacing-unit);
            color: #ffffff;
        }

        .copyright {
            text-align: center;
            padding-top: var(--spacing-unit);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: var(--header-bg-color);
                padding: var(--spacing-unit) 0;
                box-shadow: 0 4px 8px rgba(0,0,0,0.1);
            }

            .nav-links.active {
                display: flex;
            }

            .nav-links li {
                text-align: center;
                padding: var(--spacing-unit);
                width: 100%;
            }

            .nav-links li a {
                display: block;
                padding: var(--spacing-unit) 0;
            }

            .mobile-nav-toggle {
                display: block;
            }

            .hero-section h1 {
                font-size: 2.5rem;
            }

            .hero-section p {
                font-size: 1.1rem;
            }

            .content-section h2 {
                font-size: 2.2rem;
            }

            .cards-container {
                grid-template-columns: 1fr;
            }

            .cta-section h2 {
                font-size: 2.2rem;
            }

            .cta-section p {
                font-size: 1.1rem;
            }

            .footer-content {
                grid-template-columns: 1fr;
                text-align: center;
            }
        }

/* roulang page: category3 */
:root {
            --primary-color: #ff6f61;
            --secondary-color: #4a90e2;
            --background-color: #f4f7f6;
            --text-color: #333;
            --light-text-color: #666;
            --border-color: #ddd;
            --card-background: #fff;
            --footer-background: #333;
            --footer-text-color: #ccc;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 8px rgba(0,0,0,0.1);
            --container-max-width: 1200px;
            --spacing-xs: 8px;
            --spacing-sm: 12px;
            --spacing-md: 16px;
            --spacing-lg: 24px;
            --spacing-xl: 32px;
        }

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

        html {
            font-size: 16px;
            line-height: 1.6;
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Helvetica Neue', Arial, sans-serif;
            color: var(--text-color);
            background-color: var(--background-color);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        .container {
            max-width: var(--container-max-width);
            margin-left: auto;
            margin-right: auto;
            padding-left: var(--spacing-md);
            padding-right: var(--spacing-md);
            width: 100%;
        }

        a {
            color: var(--secondary-color);
            text-decoration: none;
            transition: color 0.3s ease;
        }

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

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

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

        /* Header */
        header {
            background-color: var(--card-background);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-sm) 0;
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        header nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.8em;
            font-weight: bold;
            color: var(--primary-color);
        }

        .nav-links {
            list-style: none;
            display: flex;
            gap: var(--spacing-lg);
        }

        .nav-links a {
            color: var(--text-color);
            font-weight: 500;
            padding: var(--spacing-sm) 0;
            position: relative;
        }

        .nav-links a.active {
            color: var(--primary-color);
            font-weight: bold;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: width 0.3s ease;
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        .mobile-nav-toggle {
            display: none;
            font-size: 1.8em;
            color: var(--text-color);
        }

        /* Hero Section */
        .hero {
            background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            color: #fff;
            padding: var(--spacing-xl) 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 50%;
            background: linear-gradient(to top, rgba(244, 247, 246, 0.8), rgba(255, 255, 255, 0));
            pointer-events: none;
        }

        .hero h1 {
            font-size: 2.8em;
            margin-bottom: var(--spacing-md);
            line-height: 1.3;
        }

        .hero p {
            font-size: 1.2em;
            margin-bottom: var(--spacing-lg);
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
            color: rgba(255, 255, 255, 0.9);
        }

        .cta-button {
            display: inline-block;
            background-color: var(--primary-color);
            color: #fff;
            padding: var(--spacing-sm) var(--spacing-lg);
            border-radius: var(--radius-md);
            font-weight: bold;
            font-size: 1.1em;
            transition: background-color 0.3s ease, transform 0.3s ease;
            box-shadow: var(--shadow-md);
        }

        .cta-button:hover {
            background-color: #e05e51;
            transform: translateY(-2px);
        }

        /* Section Styles */
        .section {
            padding: var(--spacing-xl) 0;
        }

        .section h2 {
            text-align: center;
            font-size: 2em;
            margin-bottom: var(--spacing-lg);
            color: var(--text-color);
        }

        /* Content Cards */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: var(--spacing-lg);
        }

        .card {
            background-color: var(--card-background);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .card img {
            width: 100%;
            height: 200px; /* Fixed height for consistency */
            object-fit: cover;
        }

        .card-content {
            padding: var(--spacing-md);
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .card-title {
            font-size: 1.3em;
            font-weight: bold;
            margin-bottom: var(--spacing-sm);
            color: var(--text-color);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-description {
            font-size: 0.95em;
            color: var(--light-text-color);
            margin-bottom: var(--spacing-md);
            flex-grow: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-link {
            display: inline-block;
            margin-top: auto; /* Pushes link to the bottom */
            text-align: right;
            font-weight: 500;
        }

        /* Feature Section */
        .features-section {
            background-color: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: var(--spacing-xl);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-lg);
            text-align: center;
        }

        .feature-item {
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .feature-icon {
            font-size: 2.5em;
            color: var(--secondary-color);
            margin-bottom: var(--spacing-sm);
        }

        .feature-item h3 {
            font-size: 1.2em;
            margin-bottom: var(--spacing-xs);
            color: var(--text-color);
        }

        .feature-item p {
            font-size: 0.95em;
            color: var(--light-text-color);
        }

        /* FAQ Section */
        .faq-section {
            background-color: var(--card-background);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: var(--spacing-xl);
        }

        .faq-item {
            margin-bottom: var(--spacing-md);
            border-bottom: 1px solid var(--border-color);
            padding-bottom: var(--spacing-md);
        }
        .faq-item:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }

        .faq-question {
            font-size: 1.1em;
            font-weight: bold;
            color: var(--text-color);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-question::after {
            content: '+';
            font-size: 1.4em;
            color: var(--light-text-color);
            transition: transform 0.3s ease;
        }

        .faq-item.open .faq-question::after {
            transform: rotate(45deg);
        }

        .faq-answer {
            font-size: 0.95em;
            color: var(--light-text-color);
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            margin-top: var(--spacing-sm);
        }

        .faq-item.open .faq-answer {
            max-height: 200px; /* Adjust as needed */
        }

        /* CTA Section */
        .cta-section {
            background-color: var(--primary-color);
            color: #fff;
            text-align: center;
            padding: var(--spacing-xl) 0;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
        }

        .cta-section h2 {
            color: #fff;
            font-size: 2em;
            margin-bottom: var(--spacing-md);
        }

        .cta-section p {
            font-size: 1.1em;
            margin-bottom: var(--spacing-lg);
            opacity: 0.9;
        }

        /* Footer */
        footer {
            background-color: var(--footer-background);
            color: var(--footer-text-color);
            padding: var(--spacing-xl) 0;
            margin-top: auto; /* Pushes footer to the bottom */
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }

        .footer-logo {
            font-size: 1.8em;
            font-weight: bold;
            color: #fff;
            margin-bottom: var(--spacing-sm);
        }

        .footer-content p {
            font-size: 0.95em;
            line-height: 1.8;
        }

        .footer-nav h4,
        .footer-content div:not(:first-child) h4 {
            color: #fff;
            font-size: 1.2em;
            margin-bottom: var(--spacing-md);
        }

        .footer-nav ul {
            list-style: none;
        }

        .footer-nav li {
            margin-bottom: var(--spacing-sm);
        }

        .footer-nav a {
            color: var(--footer-text-color);
            font-size: 0.95em;
            transition: color 0.3s ease;
        }

        .footer-nav a:hover {
            color: #fff;
        }

        .copyright {
            text-align: center;
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9em;
            margin-top: var(--spacing-lg);
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            html {
                font-size: 15px;
            }

            .logo {
                font-size: 1.6em;
            }

            .nav-links {
                display: none; /* Hidden by default on mobile */
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--card-background);
                box-shadow: var(--shadow-md);
                padding: var(--spacing-md) 0;
                gap: 0;
            }

            .nav-links.active {
                display: flex;
            }

            .nav-links li {
                text-align: center;
                width: 100%;
                padding: var(--spacing-sm) 0;
            }

            .nav-links a {
                display: block;
                width: 100%;
                padding: var(--spacing-sm) var(--spacing-md);
            }
             .nav-links a::after {
                display: none;
            }

            .mobile-nav-toggle {
                display: block;
            }

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

            .hero p {
                font-size: 1.1em;
            }

            .section h2 {
                font-size: 1.8em;
            }

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

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

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

        @media (max-width: 520px) {
            html {
                font-size: 14px;
            }
            .hero h1 {
                font-size: 1.8em;
            }
            .hero p {
                font-size: 1em;
            }
            .section h2 {
                font-size: 1.6em;
            }
        }

/* roulang page: category4 */
:root {
            --primary-color: #007bff;
            --secondary-color: #6c757d;
            --accent-color: #ffc107;
            --background-color: #f8f9fa;
            --text-color: #343a40;
            --light-text-color: #6c757d;
            --border-color: #dee2e6;
            --card-bg: #ffffff;
            --footer-bg: #343a40;
            --footer-text-color: rgba(255, 255, 255, 0.7);
            --container-max-width: 1200px;
            --spacing-unit: 1rem;
            --border-radius: 0.25rem;
            --box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
            --transition-fast: all 0.2s ease-in-out;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--background-color);
        }

        .container {
            max-width: var(--container-max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-unit);
        }

        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition-fast);
        }

        a:hover {
            color: #0056b3;
            text-decoration: underline;
        }

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

        h1, h2, h3, h4, h5, h6 {
            margin-bottom: calc(var(--spacing-unit) * 0.75);
            line-height: 1.3;
        }

        h1 { font-size: 2.5rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.75rem; }
        h4 { font-size: 1.5rem; }

        /* Header & Nav */
        header {
            background-color: var(--card-bg);
            padding: var(--spacing-unit) 0;
            box-shadow: var(--box-shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        header nav.container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: var(--text-color);
            text-decoration: none;
        }

        .logo:hover {
            text-decoration: none;
            color: var(--primary-color);
        }

        .nav-links {
            list-style: none;
            display: flex;
            gap: calc(var(--spacing-unit) * 1.5);
        }

        .nav-links a {
            color: var(--text-color);
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
        }

        .nav-links a.active {
            color: var(--primary-color);
            font-weight: bold;
        }

        .nav-links a:hover {
            color: var(--primary-color);
            text-decoration: none;
        }

        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--text-color);
        }

        /* Hero Section */
        .hero {
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            color: #fff;
            text-align: center;
            padding: calc(var(--spacing-unit) * 5) var(--spacing-unit);
            position: relative;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            min-height: 60vh;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5); /* Overlay for text readability */
        }

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

        .hero h1 {
            font-size: 3rem;
            margin-bottom: calc(var(--spacing-unit) * 0.5);
        }

        .hero p {
            font-size: 1.2rem;
            margin-bottom: calc(var(--spacing-unit) * 2);
        }

        .cta-button {
            display: inline-block;
            background-color: var(--accent-color);
            color: var(--text-color);
            padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);
            border-radius: var(--border-radius);
            font-weight: bold;
            text-decoration: none;
            transition: var(--transition-fast);
            box-shadow: var(--box-shadow);
        }

        .cta-button:hover {
            background-color: #e0a800;
            color: var(--text-color);
            text-decoration: none;
            transform: translateY(-2px);
        }

        /* Section Styling */
        .section {
            padding: calc(var(--spacing-unit) * 3) 0;
        }

        .section h2 {
            text-align: center;
            margin-bottom: calc(var(--spacing-unit) * 2);
        }

        /* Card Grid */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: calc(var(--spacing-unit) * 2);
        }

        .card {
            background-color: var(--card-bg);
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            overflow: hidden;
            transition: var(--transition-fast);
            display: flex;
            flex-direction: column;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
        }

        .card img {
            width: 100%;
            height: 200px; /* Fixed height for consistent look */
            object-fit: cover; /* Ensures image covers the area */
        }

        .card-content {
            padding: var(--spacing-unit);
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .card-content h3 {
            font-size: 1.3rem;
            margin-bottom: calc(var(--spacing-unit) * 0.5);
        }

        .card-content p {
            font-size: 0.95rem;
            color: var(--light-text-color);
            margin-bottom: var(--spacing-unit);
        }

        .card-content .btn {
            display: inline-block;
            background-color: var(--primary-color);
            color: #fff;
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
            text-decoration: none;
            font-weight: 500;
            margin-top: auto; /* Push to bottom */
            text-align: center;
        }

        .card-content .btn:hover {
            background-color: #0056b3;
            text-decoration: none;
        }

        /* FAQ Section */
        .faq-section {
            background-color: #fff;
            padding: calc(var(--spacing-unit) * 3) 0;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-color);
            margin-bottom: var(--spacing-unit);
        }

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

        .faq-question {
            font-weight: bold;
            cursor: pointer;
            padding: var(--spacing-unit) 0;
            position: relative;
            padding-right: 30px;
        }

        .faq-question::after {
            content: '+';
            position: absolute;
            right: 0;
            font-size: 1.3rem;
            color: var(--primary-color);
            top: 50%;
            transform: translateY(-50%);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            padding-left: 10px; /* Indent answer slightly */
        }

        .faq-item.open .faq-answer {
            max-height: 200px; /* Adjust as needed */
            padding-top: var(--spacing-unit);
            padding-bottom: var(--spacing-unit);
        }

        .faq-item.open .faq-question::after {
            content: '-';
        }

        /* CTA Section */
        .cta-section {
            background-color: var(--primary-color);
            color: #fff;
            text-align: center;
            padding: calc(var(--spacing-unit) * 4) var(--spacing-unit);
        }

        .cta-section h2 {
            font-size: 2.2rem;
            margin-bottom: calc(var(--spacing-unit) * 1);
        }

        .cta-section p {
            font-size: 1.1rem;
            margin-bottom: calc(var(--spacing-unit) * 2);
        }

        .cta-section .cta-button {
            background-color: var(--accent-color);
            color: var(--text-color);
            padding: calc(var(--spacing-unit) * 1.2) calc(var(--spacing-unit) * 3);
            font-size: 1.1rem;
        }

        .cta-section .cta-button:hover {
            background-color: #e0a800;
            transform: translateY(-3px);
        }

        /* Footer */
        footer {
            background-color: var(--footer-bg);
            color: var(--footer-text-color);
            padding: calc(var(--spacing-unit) * 3) 0;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: calc(var(--spacing-unit) * 2);
            margin-bottom: calc(var(--spacing-unit) * 2);
        }

        .footer-logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: #fff;
            margin-bottom: var(--spacing-unit);
        }

        .footer-nav h4,
        .footer-content > div:nth-child(2) h4,
        .footer-content > div:nth-child(3) h4,
        .footer-content > div:nth-child(4) h4 {
            color: #fff;
            margin-bottom: var(--spacing-unit);
            font-size: 1.2rem;
        }

        .footer-nav ul {
            list-style: none;
        }

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

        .footer-nav ul li a {
            color: var(--footer-text-color);
        }

        .footer-nav ul li a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .copyright {
            text-align: center;
            padding-top: var(--spacing-unit);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
        }

        /* Responsive Adjustments */
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .hero h1 { font-size: 2.5rem; }
            .hero p { font-size: 1.1rem; }
            .nav-links {
                display: none; /* Hidden by default on mobile */
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--card-bg);
                box-shadow: var(--box-shadow);
                padding: var(--spacing-unit);
                gap: 0;
            }
            .nav-links li {
                margin-bottom: var(--spacing-unit);
                text-align: center;
            }
            .nav-links a {
                display: block;
                padding: 1rem 0;
            }
            .mobile-nav-toggle {
                display: block;
            }
            .nav-links.active {
                display: flex; /* Show when toggled */
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category5 */
:root {
            --primary-color: #ff4500; /* 鲜亮的橙红色 */
            --secondary-color: #ff8c00; /* 温暖的橙色 */
            --background-color: #f4f7f6; /* 浅灰绿色背景 */
            --text-color: #333;
            --muted-text-color: #666;
            --border-color: #e0e0e0;
            --card-bg: #ffffff;
            --footer-bg: #2c3e50; /* 深邃的蓝灰色 */
            --footer-text-color: rgba(255, 255, 255, 0.7);
            --button-hover-bg: #e04000;
            --button-hover-text: #ffffff;
            --container-width: 1200px;
            --spacing-unit: 16px;
            --border-radius: 8px;
            --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition-speed: 0.3s;
        }

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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: var(--background-color);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        .container {
            width: 90%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 calc(var(--spacing-unit) * 1.5);
        }

        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: color var(--transition-speed) ease;
        }

        a:hover, a:focus {
            color: var(--button-hover-bg);
            text-decoration: underline;
        }

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

        /* Header & Navigation */
        header {
            background-color: var(--card-bg);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
            padding: calc(var(--spacing-unit) * 1.5) 0;
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        header nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
            letter-spacing: 1px;
        }

        .nav-links {
            list-style: none;
            display: flex;
        }

        .nav-links li {
            margin-left: calc(var(--spacing-unit) * 2);
        }

        .nav-links a {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-color);
            padding: var(--spacing-unit) 0;
            position: relative;
        }

        .nav-links a.active {
            color: var(--primary-color);
            font-weight: 600;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: width var(--transition-speed) ease;
        }

        .nav-links li:hover > a::after {
            width: 100%;
        }

        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 2rem;
            cursor: pointer;
            color: var(--text-color);
        }

        /* Hero Section */
        .hero {
            background-image: linear-gradient(rgba(44, 62, 80, 0.6), rgba(44, 62, 80, 0.6)), url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            color: #ffffff;
            text-align: center;
            padding: calc(var(--spacing-unit) * 8) calc(var(--spacing-unit) * 2);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
        }

        .hero h1 {
            font-size: 3rem;
            margin-bottom: var(--spacing-unit);
            line-height: 1.3;
            text-shadow: 2px 2px 8px rgba(0,0,0,0.5);
        }

        .hero p {
            font-size: 1.2rem;
            margin-bottom: calc(var(--spacing-unit) * 3);
            max-width: 700px;
            text-shadow: 1px 1px 4px rgba(0,0,0,0.5);
        }

        .cta-button {
            display: inline-block;
            background-color: var(--primary-color);
            color: #ffffff;
            padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3);
            border-radius: var(--border-radius);
            font-size: 1.1rem;
            font-weight: 600;
            transition: background-color var(--transition-speed) ease, transform var(--transition-speed) ease;
            box-shadow: var(--box-shadow);
        }

        .cta-button:hover, .cta-button:focus {
            background-color: var(--button-hover-bg);
            transform: translateY(-3px);
            text-decoration: none;
            color: var(--button-hover-text);
        }

        /* Content Sections */
        main .section {
            padding: calc(var(--spacing-unit) * 6) 0;
        }

        .section h2 {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: calc(var(--spacing-unit) * 5);
            color: var(--primary-color);
        }

        .content-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: calc(var(--spacing-unit) * 3);
        }

        .content-card {
            background-color: var(--card-bg);
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            overflow: hidden;
            transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
            display: flex;
            flex-direction: column;
        }

        .content-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
        }

        .content-card img {
            width: 100%;
            height: 200px; /* Fixed height for consistency */
            object-fit: cover;
            border-bottom: 1px solid var(--border-color);
        }

        .content-card-body {
            padding: calc(var(--spacing-unit) * 2);
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .content-card h3 {
            font-size: 1.3rem;
            margin-bottom: var(--spacing-unit);
            color: var(--primary-color);
        }

        .content-card p {
            font-size: 0.95rem;
            color: var(--muted-text-color);
            flex-grow: 1;
        }

        .content-card .card-footer {
            margin-top: var(--spacing-unit);
            font-size: 0.85rem;
            color: var(--muted-text-color);
            text-align: right;
        }

        /* Feature Section */
        .features-section {
            background-color: var(--card-bg);
            padding: calc(var(--spacing-unit) * 6) 0;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: calc(var(--spacing-unit) * 3);
            text-align: center;
        }

        .feature-item {
            padding: calc(var(--spacing-unit) * 2);
        }

        .feature-item i {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: var(--spacing-unit);
        }

        .feature-item h4 {
            font-size: 1.2rem;
            margin-bottom: var(--spacing-unit);
            color: var(--primary-color);
        }

        .feature-item p {
            font-size: 0.95rem;
            color: var(--muted-text-color);
        }

        /* FAQ Section */
        .faq-section {
            padding: calc(var(--spacing-unit) * 6) 0;
        }

        .faq-item {
            margin-bottom: calc(var(--spacing-unit) * 2);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            overflow: hidden;
        }

        .faq-question {
            background-color: var(--card-bg);
            padding: calc(var(--spacing-unit) * 1.5);
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            position: relative;
            color: var(--primary-color);
        }

        .faq-question::after {
            content: '+';
            position: absolute;
            right: calc(var(--spacing-unit) * 1.5);
            font-size: 1.5rem;
            transition: transform var(--transition-speed) ease;
        }

        .faq-item.open .faq-question::after {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-speed) ease-out;
            background-color: var(--card-bg);
            padding: 0 calc(var(--spacing-unit) * 1.5);
        }

        .faq-answer p {
            padding: calc(var(--spacing-unit) * 1.5) 0;
            font-size: 0.95rem;
            color: var(--muted-text-color);
        }

        /* CTA Section */
        .cta-section {
            background-color: var(--primary-color);
            color: #ffffff;
            text-align: center;
            padding: calc(var(--spacing-unit) * 6) 0;
        }

        .cta-section h2 {
            font-size: 2.8rem;
            margin-bottom: var(--spacing-unit);
            color: #ffffff;
        }

        .cta-section p {
            font-size: 1.2rem;
            margin-bottom: calc(var(--spacing-unit) * 3);
        }

        .cta-section .cta-button {
            background-color: #ffffff;
            color: var(--primary-color);
            border: 2px solid #ffffff;
        }

        .cta-section .cta-button:hover, .cta-section .cta-button:focus {
            background-color: var(--button-hover-bg);
            color: #ffffff;
            border-color: var(--button-hover-bg);
        }

        /* Footer */
        footer {
            background-color: var(--footer-bg);
            color: var(--footer-text-color);
            padding: calc(var(--spacing-unit) * 5) 0 calc(var(--spacing-unit) * 2) 0;
            margin-top: auto; /* Pushes footer to the bottom */
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: calc(var(--spacing-unit) * 3);
            padding-bottom: calc(var(--spacing-unit) * 4);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: var(--spacing-unit);
        }

        .footer-content p {
            font-size: 0.95rem;
        }

        .footer-nav h4, .footer-content div:nth-child(3) h4, .footer-content div:nth-child(4) h4 {
            font-size: 1.2rem;
            color: #ffffff;
            margin-bottom: var(--spacing-unit) * 1.5;
        }

        .footer-nav ul {
            list-style: none;
        }

        .footer-nav li {
            margin-bottom: var(--spacing-unit);
        }

        .footer-nav a {
            color: var(--footer-text-color);
            font-size: 0.95rem;
            transition: color var(--transition-speed) ease;
        }

        .footer-nav a:hover, .footer-nav a:focus {
            color: #ffffff;
            text-decoration: underline;
        }

        .copyright {
            text-align: center;
            padding-top: var(--spacing-unit);
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .nav-links {
                display: none; /* Hide desktop nav on smaller screens */
            }
            .mobile-nav-toggle {
                display: block; /* Show mobile toggle button */
            }
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
            .content-grid, .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.2rem;
            }
            .section h2 {
                font-size: 2.2rem;
            }
            .content-grid, .feature-grid {
                grid-template-columns: 1fr;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
            .footer-nav ul {
                margin-bottom: var(--spacing-unit) * 2;
            }
        }

        @media (max-width: 520px) {
            .logo {
                font-size: 1.5rem;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .section h2 {
                font-size: 2rem;
            }
            .cta-button {
                padding: calc(var(--spacing-unit) * 1.2) calc(var(--spacing-unit) * 2.5);
                font-size: 1rem;
            }
            .cta-section h2 {
                font-size: 2rem;
            }
            .cta-section p {
                font-size: 1.1rem;
            }
        }