/* roulang page: index */
:root {
            --primary-color: #007bff;
            --secondary-color: #6c757d;
            --accent-color: #28a745;
            --background-color: #f8f9fa;
            --text-color: #212529;
            --muted-text-color: #6c757d;
            --border-color: #dee2e6;
            --card-background: #ffffff;
            --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --border-radius: 8px;
            --container-max-width: 1200px;
            --spacing-unit: 1rem;
            --font-family: 'Helvetica Neue', Arial, sans-serif;
        }

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

        body {
            font-family: var(--font-family);
            line-height: 1.7;
            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: #0056b3;
            text-decoration: underline;
        }

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

        button {
            font-family: var(--font-family);
            cursor: pointer;
            border: none;
            border-radius: var(--border-radius);
            transition: all 0.3s ease;
        }

        .container {
            max-width: var(--container-max-width);
            margin: 0 auto;
            padding: 0 calc(var(--spacing-unit) * 1.5);
            width: 100%;
        }

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

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

        .logo {
            font-size: 1.8em;
            font-weight: bold;
            color: var(--primary-color);
            text-decoration: none;
            letter-spacing: 1px;
        }
        .logo:hover {
            text-decoration: none;
        }

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

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

        .nav-links a {
            color: var(--text-color);
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
            text-decoration: none;
        }

        .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,
        .nav-links a.active {
            color: var(--primary-color);
        }
        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        /* Mobile Navigation */
        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 2em;
            cursor: pointer;
            color: var(--text-color);
        }

        .mobile-menu {
            display: none;
            position: absolute;
            top: 70px; /* Header height */
            left: 0;
            width: 100%;
            background-color: var(--card-background);
            box-shadow: var(--box-shadow);
            padding: var(--spacing-unit);
            flex-direction: column;
            align-items: center;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            margin: calc(var(--spacing-unit) * 0.5) 0;
            width: 100%;
            text-align: center;
            padding: var(--spacing-unit) 0;
        }

        /* 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: #ffffff;
            text-align: center;
            padding: calc(var(--spacing-unit) * 8) 0;
            position: relative;
        }

        .hero h1 {
            font-size: 3.5em;
            margin-bottom: var(--spacing-unit);
            letter-spacing: 1px;
        }

        .hero p {
            font-size: 1.4em;
            margin-bottom: calc(var(--spacing-unit) * 3);
            opacity: 0.9;
        }

        .hero .cta-button {
            display: inline-block;
            background-color: var(--accent-color);
            color: #ffffff;
            padding: calc(var(--spacing-unit) * 1.2) calc(var(--spacing-unit) * 3);
            font-size: 1.2em;
            font-weight: bold;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            transition: background-color 0.3s ease, transform 0.3s ease;
        }

        .hero .cta-button:hover {
            background-color: #218838;
            transform: translateY(-3px);
            text-decoration: none;
        }

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

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

        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background-color: var(--primary-color);
        }

        /* Featured Categories Section */
        .featured-categories .section-title {
            margin-bottom: calc(var(--spacing-unit) * 3);
        }

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

        .category-card {
            background-color: var(--card-background);
            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;
        }

        .category-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
        }

        .category-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .category-card-content {
            padding: calc(var(--spacing-unit) * 2);
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
            text-align: center;
        }

        .category-card h3 {
            font-size: 1.8em;
            margin-bottom: var(--spacing-unit);
            color: var(--primary-color);
        }

        .category-card p {
            font-size: 1em;
            color: var(--muted-text-color);
            margin-bottom: var(--spacing-unit);
        }

        .category-card .view-more-btn {
            display: inline-block;
            margin-top: var(--spacing-unit);
            padding: calc(var(--spacing-unit) * 0.8) calc(var(--spacing-unit) * 2);
            background-color: var(--primary-color);
            color: #ffffff;
            border-radius: var(--border-radius);
            font-weight: 500;
            transition: background-color 0.3s ease, transform 0.3s ease;
        }

        .category-card .view-more-btn:hover {
            background-color: #0056b3;
            transform: translateY(-2px);
            text-decoration: none;
        }

        /* Latest Content Section */
        .latest-content .section-title {
            margin-bottom: calc(var(--spacing-unit) * 3);
        }

        .content-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: calc(var(--spacing-unit) * 3);
        }

        .content-item {
            background-color: var(--card-background);
            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;
        }

        .content-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
        }

        .content-item img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

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

        .content-item-info h3 {
            font-size: 1.5em;
            margin-bottom: calc(var(--spacing-unit) * 0.5);
            color: var(--text-color);
        }

        .content-item-info a {
            color: var(--text-color);
            text-decoration: none;
            font-weight: 500;
        }
        .content-item-info a:hover {
            text-decoration: underline;
            color: var(--primary-color);
        }

        .content-item-meta {
            font-size: 0.9em;
            color: var(--muted-text-color);
            margin-bottom: var(--spacing-unit);
            display: flex;
            gap: calc(var(--spacing-unit) * 1.5);
            flex-wrap: wrap;
        }

        .content-item-excerpt {
            font-size: 1em;
            color: var(--muted-text-color);
            margin-bottom: var(--spacing-unit);
            flex-grow: 1;
        }

        .content-item .read-more-link {
            font-weight: 500;
            color: var(--primary-color);
            text-decoration: none;
            align-self: flex-start;
            transition: color 0.3s ease;
        }
        .content-item .read-more-link:hover {
            color: #0056b3;
        }

        /* FAQ Section */
        .faq-section {
            background-color: var(--card-background);
            border-radius: var(--border-radius);
            padding: calc(var(--spacing-unit) * 5) 0;
        }
        .faq-section .section-title {
            margin-bottom: calc(var(--spacing-unit) * 3);
        }

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

        .faq-question {
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-size: 1.3em;
            font-weight: 500;
            padding: calc(var(--spacing-unit) * 1.5) 0;
            cursor: pointer;
            position: relative;
            color: var(--text-color);
        }

        .faq-question::after {
            content: '+';
            position: absolute;
            right: 0;
            font-size: 1.5em;
            transition: transform 0.3s ease;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            font-size: 1em;
            color: var(--muted-text-color);
            padding: 0 calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 1.5) 0;
            transition: max-height 0.3s ease, padding 0.3s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 200px; /* Adjust based on expected content height */
            padding-top: calc(var(--spacing-unit) * 1.5);
        }

        /* CTA Section */
        .cta-section {
            background-color: var(--primary-color);
            color: #ffffff;
            text-align: center;
            padding: calc(var(--spacing-unit) * 6) 0;
            background-image: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            border-radius: var(--border-radius);
            margin-top: calc(var(--spacing-unit) * 4);
        }

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

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

        .cta-section .cta-button {
            display: inline-block;
            background-color: var(--accent-color);
            color: #ffffff;
            padding: calc(var(--spacing-unit) * 1.2) calc(var(--spacing-unit) * 3);
            font-size: 1.2em;
            font-weight: bold;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            transition: background-color 0.3s ease, transform 0.3s ease;
        }

        .cta-section .cta-button:hover {
            background-color: #218838;
            transform: translateY(-3px);
            text-decoration: none;
        }

        /* Footer */
        footer {
            background-color: #343a40;
            color: #ffffff;
            padding: calc(var(--spacing-unit) * 4) 0 calc(var(--spacing-unit) * 2) 0;
            margin-top: auto; /* Push footer to bottom */
            text-align: center;
        }

        .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-logo {
            font-size: 2em;
            font-weight: bold;
            margin-bottom: var(--spacing-unit);
            display: block;
        }

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

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

        .footer-links a {
            color: #adb5bd;
            transition: color 0.3s ease;
        }

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

        .footer-contact p, .footer-contact span {
            color: #adb5bd;
            margin-bottom: calc(var(--spacing-unit) * 0.5);
        }

        .footer-copyright {
            font-size: 0.9em;
            color: #6c757d;
            margin-top: calc(var(--spacing-unit) * 2);
            border-top: 1px solid #495057;
            padding-top: var(--spacing-unit);
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            .nav-links {
                display: none;
            }
            .mobile-nav-toggle {
                display: block;
            }
            .hero h1 {
                font-size: 2.8em;
            }
            .hero p {
                font-size: 1.2em;
            }
            .section-title {
                font-size: 2.2em;
            }
            .category-card img, .content-item img {
                height: 180px;
            }
        }

        @media (max-width: 768px) {
            .hero {
                padding: calc(var(--spacing-unit) * 6) 0;
            }
            .hero h1 {
                font-size: 2.5em;
            }
            .hero p {
                font-size: 1.1em;
                margin-bottom: calc(var(--spacing-unit) * 2);
            }
            .section {
                padding: calc(var(--spacing-unit) * 4) 0;
            }
            .section-title {
                font-size: 2em;
                margin-bottom: calc(var(--spacing-unit) * 3);
            }
            .category-card-content, .content-item-info {
                padding: calc(var(--spacing-unit) * 1.5);
            }
            .category-card h3, .content-item-info h3 {
                font-size: 1.6em;
            }
            .cta-section {
                padding: calc(var(--spacing-unit) * 5) 0;
            }
            .cta-section h2 {
                font-size: 2.2em;
            }
            .cta-section p {
                font-size: 1.1em;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 576px) {
            .hero h1 {
                font-size: 2em;
            }
            .hero .cta-button, .cta-section .cta-button {
                font-size: 1.1em;
                padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);
            }
            .category-grid, .content-list {
                grid-template-columns: 1fr;
            }
            .category-card img, .content-item img {
                height: 160px;
            }
            .faq-question {
                font-size: 1.1em;
            }
            .cta-section h2 {
                font-size: 1.8em;
            }
            .cta-section p {
                font-size: 1em;
            }
            .logo {
                font-size: 1.5em;
            }
        }

/* roulang page: article */
:root {
            --primary-color: #007bff;
            --secondary-color: #6c757d;
            --background-color: #f8f9fa;
            --text-color: #343a40;
            --light-text-color: #6c757d;
            --border-color: #dee2e6;
            --card-bg: #ffffff;
            --body-font: 'Arial', sans-serif;
            --heading-font: 'Arial', sans-serif;
            --container-max-width: 1200px;
            --spacing-unit: 1rem;
            --radius-sm: 0.25rem;
            --radius-md: 0.5rem;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
            --shadow-md: 0 4px 8px rgba(0,0,0,0.1);
        }

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

        body {
            font-family: var(--body-font);
            line-height: 1.7;
            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: color 0.3s ease;
        }

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

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

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--heading-font);
            margin-bottom: var(--spacing-unit);
            line-height: 1.3;
        }

        h1 { font-size: 2.5rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.75rem; }
        h4 { font-size: 1.5rem; }
        h5 { font-size: 1.25rem; }
        h6 { font-size: 1rem; }

        /* Header & Navigation */
        header {
            background-color: var(--card-bg);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-unit) 0;
            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(--text-color);
            text-decoration: none;
        }
        .logo:hover {
            text-decoration: none;
        }

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

        .nav-links li a {
            color: var(--text-color);
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
            text-decoration: none;
        }

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

        .nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--primary-color);
        }

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

        .mobile-menu {
            display: none;
            list-style: none;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background-color: var(--card-bg);
            box-shadow: var(--shadow-md);
            padding: var(--spacing-unit) 0;
            flex-direction: column;
            align-items: center;
            gap: var(--spacing-unit);
        }

        .mobile-menu li a {
            color: var(--text-color);
            font-weight: 500;
            padding: 0.5rem 0;
        }
        .mobile-menu li a.active {
            color: var(--primary-color);
        }

        /* Hero Section (for article pages, different from homepage) */
        .hero {
            background-color: var(--card-bg);
            padding: calc(var(--spacing-unit) * 4) 0;
            text-align: center;
            position: relative;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-3.webp'); /* Fallback or additional image */
            background-size: cover;
            background-position: center;
            color: #fff; /* Ensure text is visible on image */
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.6);
            z-index: 1;
        }

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

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

        .hero p {
            font-size: 1.2rem;
            color: #eee;
            max-width: 800px;
            margin: 0 auto;
        }

        /* Main Content Area */
        main {
            padding: calc(var(--spacing-unit) * 3) 0;
        }

        .article-content {
            background-color: var(--card-bg);
            padding: calc(var(--spacing-unit) * 3);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
        }

        .article-content h1 {
            font-size: 2.2rem;
            color: var(--text-color);
            margin-bottom: var(--spacing-unit);
        }
        
        .article-meta {
            font-size: 0.9rem;
            color: var(--light-text-color);
            margin-bottom: calc(var(--spacing-unit) * 2);
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-unit);
        }

        .article-meta span {
            margin-right: calc(var(--spacing-unit) * 1.5);
        }
        .article-meta span:last-child {
            margin-right: 0;
        }

        .article-meta .category {
            background-color: var(--primary-color);
            color: #fff;
            padding: 0.2rem 0.7rem;
            border-radius: var(--radius-sm);
            font-weight: bold;
            text-decoration: none;
        }
        .article-meta .category:hover {
            background-color: #0056b3;
            text-decoration: none;
        }

        .article-content p {
            margin-bottom: var(--spacing-unit);
            font-size: 1.1rem;
        }
        
        .article-content p:last-of-type {
            margin-bottom: 0;
        }

        .article-content h2, .article-content h3 {
            margin-top: calc(var(--spacing-unit) * 2);
            margin-bottom: var(--spacing-unit);
        }

        .article-content img {
            margin: var(--spacing-unit) auto;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-sm);
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary-color);
            padding-left: var(--spacing-unit);
            margin-left: 0;
            font-style: italic;
            color: var(--light-text-color);
        }

        .content-not-found {
            text-align: center;
            padding: calc(var(--spacing-unit) * 5) 0;
        }

        .content-not-found h2 {
            font-size: 2.5rem;
            margin-bottom: var(--spacing-unit);
            color: var(--primary-color);
        }

        .content-not-found p {
            font-size: 1.2rem;
            margin-bottom: calc(var(--spacing-unit) * 2);
        }

        .content-not-found .btn {
            display: inline-block;
            padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 2);
            background-color: var(--primary-color);
            color: #fff;
            border-radius: var(--radius-md);
            font-weight: bold;
            transition: background-color 0.3s ease;
        }

        .content-not-found .btn:hover {
            background-color: #0056b3;
            text-decoration: none;
        }

        /* Footer */
        footer {
            background-color: #212529;
            color: #adb5bd;
            padding: calc(var(--spacing-unit) * 4) 0;
            font-size: 0.9rem;
        }

        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: calc(var(--spacing-unit) * 3);
            margin-bottom: calc(var(--spacing-unit) * 3);
        }

        .footer-logo {
            font-size: 2rem;
            font-weight: bold;
            color: #fff;
            flex: 1;
            min-width: 200px;
        }

        .footer-links, .footer-contact {
            flex: 1;
            min-width: 200px;
        }

        .footer-links h4, .footer-contact h4 {
            color: #fff;
            margin-bottom: var(--spacing-unit);
            font-size: 1.25rem;
        }

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

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

        .footer-links ul li a {
            color: #adb5bd;
        }
        .footer-links ul li a:hover {
            color: #fff;
        }

        .footer-contact p, .footer-contact span {
            margin-bottom: 0.5rem;
        }
        .footer-contact a {
            color: #adb5bd;
        }
        .footer-contact a:hover {
            color: #fff;
        }

        .footer-copyright {
            text-align: center;
            padding-top: var(--spacing-unit);
            border-top: 1px solid #454d55;
        }

        .footer-copyright a {
            color: #6c757d;
        }
        .footer-copyright a:hover {
            color: #fff;
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .hero h1 { font-size: 2.5rem; }
            .hero p { font-size: 1.1rem; }
            .article-content { padding: calc(var(--spacing-unit) * 2); }
            .footer-content { flex-direction: column; text-align: center; }
            .footer-logo, .footer-links, .footer-contact { width: 100%; }
            .logo { font-size: 1.5rem; }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .mobile-nav-toggle {
                display: block;
            }
            .mobile-menu.active {
                display: flex;
            }
            header .container {
                flex-wrap: wrap;
            }
        }

        @media (max-width: 576px) {
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.6rem; }
            .hero { padding: calc(var(--spacing-unit) * 3) 0; }
            .hero h1 { font-size: 2rem; }
            .article-content h1 { font-size: 1.8rem; }
            .article-meta { flex-direction: column; gap: 0.5rem; }
            .article-meta span { margin-right: 0; }
            .content-not-found h2 { font-size: 2rem; }
            .content-not-found p { font-size: 1.1rem; }
        }

/* roulang page: category1 */
:root {
            --primary-color: #007bff;
            --secondary-color: #6c757d;
            --accent-color: #ffc107;
            --background-color: #f8f9fa;
            --text-color: #343a40;
            --light-text-color: #6c757d;
            --border-color: #dee2e6;
            --card-background: #ffffff;
            --shadow-light: 0 2px 4px rgba(0, 0, 0, 0.1);
            --shadow-medium: 0 4px 8px rgba(0, 0, 0, 0.15);
            --border-radius-small: 4px;
            --border-radius-medium: 8px;
            --border-radius-large: 12px;
            --spacing-xs: 8px;
            --spacing-sm: 12px;
            --spacing-md: 16px;
            --spacing-lg: 24px;
            --spacing-xl: 32px;
        }

        * {
            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);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

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

        a:hover {
            color: #0056b3;
        }

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

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

        /* Header & Navigation */
        header {
            background-color: var(--card-background);
            box-shadow: var(--shadow-light);
            padding: var(--spacing-sm) 0;
            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(--primary-color);
        }

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

        .nav-links li a {
            color: var(--text-color);
            font-weight: 500;
            padding: var(--spacing-sm) var(--spacing-md);
            border-radius: var(--border-radius-small);
            transition: background-color 0.3s ease, color 0.3s ease;
        }

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

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

        .mobile-menu {
            display: none;
            list-style: none;
            background-color: var(--card-background);
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            width: 100%;
            padding: var(--spacing-sm) 0;
            box-shadow: var(--shadow-medium);
        }

        .mobile-menu li a {
            display: block;
            padding: var(--spacing-md);
            text-align: center;
            color: var(--text-color);
        }

        .mobile-menu li a.active {
            background-color: var(--primary-color);
            color: #ffffff;
        }

        /* Hero Section */
        .hero {
            background-color: var(--primary-color);
            color: #ffffff;
            text-align: center;
            padding: var(--spacing-xl) var(--spacing-md);
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 1;
        }

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

        .hero h1 {
            font-size: 2.8rem;
            margin-bottom: var(--spacing-sm);
        }

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

        .hero .btn {
            display: inline-block;
            background-color: var(--accent-color);
            color: var(--text-color);
            padding: var(--spacing-sm) var(--spacing-lg);
            border-radius: var(--border-radius-medium);
            font-weight: bold;
            font-size: 1.1rem;
            transition: transform 0.3s ease, background-color 0.3s ease;
        }

        .hero .btn:hover {
            background-color: #e0a800;
            transform: translateY(-2px);
        }

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

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

        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--spacing-lg);
        }

        .card {
            background-color: var(--card-background);
            border-radius: var(--border-radius-medium);
            box-shadow: var(--shadow-medium);
            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 16px rgba(0, 0, 0, 0.2);
        }

        .card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

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

        .card-content h3 {
            font-size: 1.4rem;
            margin-bottom: var(--spacing-sm);
            color: var(--primary-color);
        }

        .card-content p {
            font-size: 0.95rem;
            color: var(--light-text-color);
            flex-grow: 1;
            margin-bottom: var(--spacing-md);
        }

        .card-content .btn-card {
            display: inline-block;
            background-color: var(--accent-color);
            color: var(--text-color);
            padding: var(--spacing-sm) var(--spacing-md);
            border-radius: var(--border-radius-small);
            font-weight: bold;
            text-align: center;
            margin-top: auto;
            transition: background-color 0.3s ease;
        }

        .card-content .btn-card:hover {
            background-color: #e0a800;
        }

        /* FAQ Section */
        .faq-section {
            background-color: #ffffff;
            padding: var(--spacing-xl) 0;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: var(--spacing-md) 0;
        }

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

        .faq-question {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--primary-color);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: var(--spacing-sm) 0;
        }

        .faq-question::after {
            content: '+';
            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;
            color: var(--light-text-color);
            padding-top: 0;
        }

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

        /* CTA Section */
        .cta-section {
            background-color: var(--primary-color);
            color: #ffffff;
            text-align: center;
            padding: var(--spacing-xl) 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            position: relative;
        }

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

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

        .cta-section h2 {
            font-size: 2.2rem;
            margin-bottom: var(--spacing-md);
        }

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

        .cta-section .btn {
            display: inline-block;
            background-color: var(--accent-color);
            color: var(--text-color);
            padding: var(--spacing-sm) var(--spacing-lg);
            border-radius: var(--border-radius-medium);
            font-weight: bold;
            font-size: 1.1rem;
            transition: background-color 0.3s ease;
        }

        .cta-section .btn:hover {
            background-color: #e0a800;
        }

        /* Footer */
        footer {
            background-color: #343a40;
            color: #ffffff;
            padding: var(--spacing-xl) 0 var(--spacing-md);
            margin-top: auto; /* Pushes footer to the bottom */
        }

        footer .container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: var(--spacing-lg);
        }

        .footer-content {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-lg);
            flex-basis: 100%; /* Ensure it takes full width on smaller screens */
        }

        .footer-logo {
            font-size: 1.8rem;
            font-weight: bold;
            margin-bottom: var(--spacing-md);
            flex-basis: 200px; /* Allow logo to take space */
        }

        .footer-links,
        .footer-contact {
            flex: 1;
            min-width: 200px; /* Minimum width for sections */
        }

        .footer-links h4,
        .footer-contact h4 {
            font-size: 1.3rem;
            margin-bottom: var(--spacing-sm);
            color: #ffffff;
        }

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

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

        .footer-links a,
        .footer-contact a {
            color: #ccc;
            transition: color 0.3s ease;
        }

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

        .footer-contact p,
        .footer-contact span {
            margin-bottom: var(--spacing-sm);
            color: #ccc;
        }

        .footer-copyright {
            width: 100%;
            text-align: center;
            padding-top: var(--spacing-lg);
            border-top: 1px solid #4a4a4a;
            margin-top: var(--spacing-xl);
            font-size: 0.9rem;
            color: #aaa;
        }

        .footer-copyright a {
            color: #aaa;
            text-decoration: underline;
        }

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

        /* Responsive Adjustments */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

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

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

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

            .section-title {
                font-size: 1.9rem;
            }

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

            .card img {
                height: 180px;
            }

            .footer-content {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }

            .footer-logo,
            .footer-links,
            .footer-contact {
                flex-basis: auto;
                width: 100%;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero .btn {
                padding: var(--spacing-sm) var(--spacing-md);
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .cta-section h2, .cta-section p {
                font-size: 1.1rem;
            }
            .cta-section .btn {
                 padding: var(--spacing-sm) var(--spacing-md);
                 font-size: 1rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary-color: #007bff;
            --secondary-color: #6c757d;
            --accent-color: #ffc107;
            --background-color: #f8f9fa;
            --text-color: #212529;
            --muted-text-color: #495057;
            --border-color: #dee2e6;
            --card-bg: #ffffff;
            --card-shadow: 0 4px 8px rgba(0,0,0,.05);
            --button-hover-bg: #0056b3;
            --nav-bg: #ffffff;
            --nav-link-hover: #0056b3;
            --footer-bg: #343a40;
            --footer-text-color: #adb5bd;
            --footer-link-hover: #ffffff;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --spacing-1: 0.25rem;
            --spacing-2: 0.5rem;
            --spacing-3: 1rem;
            --spacing-4: 1.5rem;
            --spacing-5: 2rem;
            --spacing-6: 3rem;
            --container-max-width: 1140px;
            --breakpoint-md: 768px;
            --breakpoint-lg: 992px;
        }

        /* Basic Reset & Base Styles */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        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;
        }

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

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

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

        h1, h2, h3, h4, h5, h6 {
            margin-bottom: var(--spacing-3);
            line-height: 1.3;
        }

        h1 { font-size: 2.5rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.75rem; }
        h4 { font-size: 1.5rem; }
        h5 { font-size: 1.25rem; }
        h6 { font-size: 1rem; }

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

        .container {
            width: 90%;
            max-width: var(--container-max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-2);
        }

        /* Header & Navigation */
        header {
            background-color: var(--nav-bg);
            box-shadow: 0 2px 4px rgba(0,0,0,.05);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

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

        .logo {
            font-size: 1.75rem;
            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: var(--spacing-3);
        }

        .nav-links li a {
            color: var(--muted-text-color);
            font-weight: 500;
            padding: var(--spacing-2) 0;
            position: relative;
            transition: color 0.2s ease-in-out;
        }

        .nav-links li a.active {
            color: var(--primary-color);
            font-weight: bold;
        }
        .nav-links li a:not(.active):hover {
            color: var(--nav-link-hover);
        }

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

        .mobile-menu {
            display: none;
            list-style: none;
            background-color: var(--nav-bg);
            padding: var(--spacing-3);
            box-shadow: 0 2px 4px rgba(0,0,0,.05);
            position: absolute;
            top: 70px;
            left: 0;
            right: 0;
            z-index: 999;
        }

        .mobile-menu li a {
            display: block;
            padding: var(--spacing-2) 0;
            color: var(--muted-text-color);
            font-weight: 500;
            text-align: center;
        }

        .mobile-menu li a.active {
            color: var(--primary-color);
            font-weight: bold;
        }

        /* Hero Section */
        .hero {
            background-color: var(--primary-color);
            color: #ffffff;
            text-align: center;
            padding: var(--spacing-6) var(--spacing-2);
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 60vh;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-1.webp'); /* Use a relevant background image */
            background-size: cover;
            background-position: center;
            opacity: 0.6;
            z-index: 0;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
        }

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

        .hero p {
            font-size: 1.25rem;
            margin-bottom: var(--spacing-4);
            opacity: 0.9;
        }

        .hero .cta-button {
            display: inline-block;
            background-color: var(--accent-color);
            color: var(--text-color);
            padding: var(--spacing-3) var(--spacing-5);
            border-radius: var(--radius-md);
            font-weight: bold;
            font-size: 1.1rem;
            transition: background-color 0.2s ease-in-out, transform 0.2s ease-in-out;
        }

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

        /* Section Styles */
        .section {
            padding: var(--spacing-6) var(--spacing-2);
        }

        .section-title {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: var(--spacing-5);
            position: relative;
            display: inline-block;
            padding-bottom: var(--spacing-2);
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background-color: var(--primary-color);
            border-radius: var(--radius-sm);
        }

        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: var(--spacing-4);
        }

        .card {
            background-color: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--card-shadow);
            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 16px rgba(0,0,0,.1);
        }

        .card-image {
            position: relative;
            overflow: hidden;
        }

        .card-image img {
            width: 100%;
            height: 200px; /* Fixed height for consistency */
            object-fit: cover;
            display: block;
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        }

        .card-content {
            padding: var(--spacing-4);
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .card-title {
            font-size: 1.5rem;
            margin-bottom: var(--spacing-2);
            color: var(--text-color);
        }

        .card-description {
            color: var(--muted-text-color);
            margin-bottom: var(--spacing-3);
            flex-grow: 1;
        }

        .card-actions .cta-button {
            display: inline-block;
            background-color: var(--primary-color);
            color: #ffffff;
            padding: var(--spacing-2) var(--spacing-4);
            border-radius: var(--radius-md);
            font-weight: bold;
            transition: background-color 0.2s ease-in-out, transform 0.2s ease-in-out;
        }

        .card-actions .cta-button:hover {
            background-color: var(--button-hover-bg);
            transform: translateY(-1px);
            text-decoration: none;
            color: #ffffff;
        }

        /* Feature Section */
        .feature-section {
            background-color: #ffffff;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(1, 1fr);
            gap: var(--spacing-6);
        }

        .feature-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: var(--spacing-3);
        }

        .feature-item .icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: var(--spacing-2);
        }

        .feature-item h3 {
            font-size: 1.5rem;
            margin-bottom: var(--spacing-1);
        }

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

        /* FAQ Section */
        .faq-section {
            background-color: var(--card-bg);
        }

        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding-bottom: var(--spacing-3);
            margin-bottom: var(--spacing-3);
        }

        .faq-item:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }

        .faq-question {
            font-weight: bold;
            color: var(--text-color);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 1.15rem;
        }

        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            transition: transform 0.2s ease-in-out;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            color: var(--muted-text-color);
            padding-top: var(--spacing-2);
        }

        .faq-answer p {
            margin-bottom: 0;
        }

        /* CTA Section */
        .cta-section {
            background-color: var(--primary-color);
            color: #ffffff;
            text-align: center;
            padding: var(--spacing-6) var(--spacing-2);
        }

        .cta-section h2 {
            font-size: 2rem;
            margin-bottom: var(--spacing-3);
        }

        .cta-section p {
            font-size: 1.1rem;
            margin-bottom: var(--spacing-4);
            opacity: 0.9;
        }

        .cta-section .cta-button {
            display: inline-block;
            background-color: var(--accent-color);
            color: var(--text-color);
            padding: var(--spacing-3) var(--spacing-5);
            border-radius: var(--radius-md);
            font-weight: bold;
            font-size: 1.1rem;
            transition: background-color 0.2s ease-in-out, transform 0.2s ease-in-out;
        }

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

        /* Footer */
        footer {
            background-color: var(--footer-bg);
            color: var(--footer-text-color);
            padding: var(--spacing-5) 0 var(--spacing-2);
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-5);
            margin-bottom: var(--spacing-4);
        }

        .footer-logo {
            font-size: 2rem;
            font-weight: bold;
            color: #ffffff;
            margin-bottom: var(--spacing-3);
        }

        .footer-links h4, .footer-contact h4 {
            color: #ffffff;
            font-size: 1.25rem;
            margin-bottom: var(--spacing-3);
        }

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

        .footer-links ul li {
            margin-bottom: var(--spacing-2);
        }

        .footer-links a, .footer-contact a {
            color: var(--footer-text-color);
            transition: color 0.2s ease-in-out;
        }

        .footer-links a:hover, .footer-contact a:hover {
            color: var(--footer-link-hover);
            text-decoration: underline;
        }

        .footer-contact p {
            margin-bottom: var(--spacing-2);
        }

        .footer-copyright {
            text-align: center;
            padding-top: var(--spacing-3);
            border-top: 1px solid var(--muted-text-color);
            font-size: 0.9rem;
        }

        .footer-copyright a {
            color: var(--footer-text-color);
            margin: 0 var(--spacing-2);
        }

        .footer-copyright a:hover {
            color: var(--footer-link-hover);
        }

        /* Responsive Design */
        @media (max-width: 991.98px) {
            .nav-links {
                display: none;
            }
            .mobile-nav-toggle {
                display: block;
            }
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
            .section-title {
                font-size: 2rem;
            }
            .card-grid {
                grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            }
        }

        @media (max-width: 767.98px) {
            header nav {
                min-height: 60px;
            }
            .logo {
                font-size: 1.5rem;
            }
            .hero {
                padding: var(--spacing-5) var(--spacing-2);
                min-height: 40vh;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero .cta-button {
                padding: var(--spacing-2) var(--spacing-4);
                font-size: 1rem;
            }
            .section {
                padding: var(--spacing-5) var(--spacing-2);
            }
            .section-title {
                font-size: 1.75rem;
                margin-bottom: var(--spacing-4);
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .feature-grid {
                gap: var(--spacing-4);
            }
            .footer-content {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .footer-logo {
                margin-bottom: var(--spacing-2);
            }
            .footer-links ul {
                margin-bottom: var(--spacing-3);
            }
        }

/* roulang page: category3 */
:root {
            --primary-color: #007bff;
            --secondary-color: #6c757d;
            --background-color: #f8f9fa;
            --text-color: #333;
            --light-text-color: #555;
            --border-color: #dee2e6;
            --card-bg: #ffffff;
            --card-shadow: 0 4px 12px rgba(0,0,0,0.08);
            --container-max-width: 1200px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 32px;
            --spacing-xl: 48px;
            --border-radius-sm: 4px;
            --border-radius-md: 8px;
            --border-radius-lg: 12px;
            --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

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

        body {
            font-family: var(--font-family);
            line-height: 1.7;
            color: var(--text-color);
            background-color: var(--background-color);
            scroll-behavior: smooth;
        }

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

        a:hover {
            color: #0056b3;
        }

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

        .container {
            width: 90%;
            max-width: var(--container-max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }

        /* Header */
        header {
            background-color: var(--card-bg);
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        header nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: var(--spacing-sm) 0;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
            text-decoration: none;
        }

        .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: var(--spacing-xs) var(--spacing-sm);
            border-radius: var(--border-radius-sm);
            transition: background-color 0.3s ease, color 0.3s ease;
        }

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

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

        .mobile-menu {
            display: none;
            list-style: none;
            background-color: var(--card-bg);
            padding: var(--spacing-sm) 0;
            text-align: center;
        }
        .mobile-menu li {
            margin-bottom: var(--spacing-sm);
        }
        .mobile-menu a {
            display: block;
            padding: var(--spacing-sm);
        }
         .mobile-menu a:hover,
        .mobile-menu a.active {
            background-color: var(--primary-color);
            color: #fff;
        }


        /* Hero Section */
        .hero {
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            color: #fff;
            text-align: center;
            padding: var(--spacing-xl) var(--spacing-sm);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1;
        }
        .hero .hero-content {
            position: relative;
            z-index: 2;
        }

        .hero h1 {
            font-size: 2.8rem;
            margin-bottom: var(--spacing-md);
            text-shadow: 0 2px 8px rgba(0,0,0,0.7);
        }

        .hero p {
            font-size: 1.2rem;
            margin-bottom: var(--spacing-lg);
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
            text-shadow: 0 1px 4px rgba(0,0,0,0.5);
        }

        .cta-button {
            display: inline-block;
            background-color: var(--primary-color);
            color: #fff;
            padding: var(--spacing-sm) var(--spacing-lg);
            border-radius: var(--border-radius-md);
            font-size: 1.1rem;
            font-weight: 700;
            transition: background-color 0.3s ease, transform 0.3s ease;
            border: none;
            cursor: pointer;
        }

        .cta-button:hover {
            background-color: #0056b3;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0,0,0,0.2);
        }

        /* Main Content */
        .main-content {
            padding: var(--spacing-xl) 0;
        }

        .section-title {
            text-align: center;
            font-size: 2.2rem;
            margin-bottom: var(--spacing-lg);
            font-weight: 700;
            color: var(--text-color);
        }

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

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

        .content-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 24px rgba(0,0,0,0.15);
        }

        .content-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }

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

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

        .content-card p {
            font-size: 0.95rem;
            color: var(--light-text-color);
            flex-grow: 1;
            margin-bottom: var(--spacing-sm);
        }

        .content-card a.learn-more {
            display: inline-block;
            margin-top: auto;
            font-weight: 600;
            align-self: flex-start;
        }

        /* FAQ Section */
        .faq-section {
            background-color: #ffffff;
            padding: var(--spacing-xl) 0;
        }

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

        .faq-question {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--primary-color);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            transition: transform 0.3s ease;
        }

        .faq-item.open .faq-question::after {
            content: '-';
            transform: rotate(180deg);
        }

        .faq-answer {
            font-size: 0.95rem;
            color: var(--light-text-color);
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            padding: 0 var(--spacing-sm); /* Padding for when it opens */
        }

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

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

        .cta-section h2 {
            font-size: 2rem;
            margin-bottom: var(--spacing-md);
        }

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

        /* Footer */
        footer {
            background-color: #343a40;
            color: #f8f9fa;
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            font-size: 0.9rem;
        }

        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            margin-bottom: var(--spacing-lg);
        }

        .footer-logo {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: var(--spacing-md);
            flex-basis: 100%;
        }

        .footer-links,
        .footer-contact {
            flex: 1;
            min-width: 200px;
            margin-right: var(--spacing-lg);
        }

        .footer-links h4,
        .footer-contact h4 {
            color: #fff;
            margin-bottom: var(--spacing-md);
            font-size: 1.1rem;
        }

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

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

        .footer-links a,
        .footer-contact a {
            color: #adb5bd;
            transition: color 0.3s ease;
        }

        .footer-links a:hover,
        .footer-contact a:hover {
            color: #fff;
        }

        .footer-contact span {
            color: #adb5bd;
            display: block;
            margin-top: var(--spacing-sm);
        }

        .footer-copyright {
            text-align: center;
            border-top: 1px solid #495057;
            padding-top: var(--spacing-lg);
            color: #6c757d;
        }

        .footer-copyright a {
            color: #6c757d;
        }

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

        /* Responsive Design */
        @media (max-width: 768px) {
            header nav {
                flex-wrap: wrap;
            }

            .nav-links {
                display: none;
            }

            .mobile-nav-toggle {
                display: block;
                order: 2; /* Place toggle button after logo */
            }

            header nav .logo {
                order: 1; /* Logo first */
            }

            .mobile-menu {
                display: none; /* Hidden by default */
                width: 100%;
                order: 3; /* Mobile menu below nav */
            }
            .mobile-menu.active {
                display: block;
            }

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

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

            .section-title {
                font-size: 1.8rem;
            }

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

            .footer-content {
                flex-direction: column;
                text-align: center;
            }

            .footer-links,
            .footer-contact {
                margin-right: 0;
                margin-bottom: var(--spacing-md);
            }
            .footer-links ul {
                padding-left: 0;
            }
        }

        @media (max-width: 520px) {
            .logo {
                font-size: 1.5rem;
            }
            .hero {
                padding: var(--spacing-lg) var(--spacing-sm);
            }
             .hero h1 {
                font-size: 1.8rem;
            }
             .hero p {
                font-size: 1rem;
            }
            .cta-button {
                padding: var(--spacing-sm) var(--spacing-md);
                font-size: 1rem;
            }
             .faq-question {
                font-size: 1rem;
            }
        }

/* roulang page: category4 */
:root {
            --primary-color: #007bff;
            --secondary-color: #6c757d;
            --accent-color: #28a745;
            --background-color: #f8f9fa;
            --card-background: #ffffff;
            --text-color: #343a40;
            --light-text-color: #6c757d;
            --border-color: #dee2e6;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
            --spacing-1: 0.5rem;
            --spacing-2: 1rem;
            --spacing-3: 1.5rem;
            --spacing-4: 2rem;
            --container-max-width: 1140px;
        }

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

        body {
            font-family: 'Arial', sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--background-color);
            margin: 0;
            padding: 0;
        }

        .container {
            max-width: var(--container-max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-2);
        }

        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;
        }

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

        /* Header & Navigation */
        header {
            background-color: var(--card-background);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-2) 0;
        }

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

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

        .nav-links {
            list-style: none;
            display: flex;
            gap: var(--spacing-3);
        }

        .nav-links li a {
            color: var(--text-color);
            font-weight: 500;
            padding: var(--spacing-1) var(--spacing-1);
            border-radius: var(--radius-sm);
            transition: background-color 0.2s ease-in-out, color 0.2s ease-in-out;
        }

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

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

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

        .mobile-menu {
            display: none;
            list-style: none;
            padding: var(--spacing-2) 0;
            background-color: var(--card-background);
            box-shadow: var(--shadow-sm);
            position: absolute;
            width: 90%;
            top: 70px; /* Adjust based on header height */
            left: 5%;
            z-index: 1000;
            border-radius: var(--radius-md);
        }
        .mobile-menu li {
            text-align: center;
            margin-bottom: var(--spacing-1);
        }
        .mobile-menu li a {
            display: block;
            padding: var(--spacing-2);
            color: var(--text-color);
            font-weight: 500;
        }
        .mobile-menu li a.active {
            background-color: var(--primary-color);
            color: #ffffff;
        }

        /* 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: #ffffff;
            text-align: center;
            padding: var(--spacing-4) 0;
            height: 50vh;
            display: flex;
            justify-content: center;
            align-items: center;
            flex-direction: column;
        }

        .hero h1 {
            font-size: 2.8rem;
            margin-bottom: var(--spacing-2);
        }

        .hero p {
            font-size: 1.2rem;
            margin-bottom: var(--spacing-3);
            max-width: 800px;
        }

        .cta-button {
            display: inline-block;
            background-color: var(--accent-color);
            color: #ffffff;
            padding: var(--spacing-2) var(--spacing-3);
            border-radius: var(--radius-lg);
            font-size: 1.1rem;
            font-weight: bold;
            transition: background-color 0.2s ease-in-out, transform 0.2s ease-in-out;
            box-shadow: var(--shadow-md);
        }

        .cta-button:hover {
            background-color: #218838;
            text-decoration: none;
            transform: translateY(-2px);
        }

        /* Content Section */
        .content-section {
            padding: var(--spacing-4) 0;
        }

        .content-section h2 {
            text-align: center;
            font-size: 2.2rem;
            margin-bottom: var(--spacing-3);
            color: var(--primary-color);
        }

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

        .card {
            background-color: var(--card-background);
            border-radius: var(--radius-md);
            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 16px rgba(0, 0, 0, 0.15);
        }

        .card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-top-left-radius: var(--radius-md);
            border-top-right-radius: var(--radius-md);
        }

        .card-content {
            padding: var(--spacing-2);
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .card-content h3 {
            font-size: 1.4rem;
            margin-bottom: var(--spacing-1);
            color: var(--text-color);
        }

        .card-content p {
            font-size: 0.95rem;
            color: var(--light-text-color);
            margin-bottom: var(--spacing-2);
            flex-grow: 1;
        }

        .card-meta {
            font-size: 0.85rem;
            color: var(--light-text-color);
            margin-bottom: var(--spacing-2);
        }

        .card-actions {
            text-align: right;
        }

        .card-actions .cta-button {
            background-color: var(--primary-color);
            font-size: 0.9rem;
            padding: var(--spacing-1) var(--spacing-2);
        }
        .card-actions .cta-button:hover {
            background-color: #0056b3;
        }

        /* FAQ Section */
        .faq-section {
            background-color: #ffffff;
            padding: var(--spacing-4) 0;
        }

        .faq-section h2 {
            margin-bottom: var(--spacing-3);
        }

        .faq-item {
            margin-bottom: var(--spacing-2);
            border-bottom: 1px solid var(--border-color);
            padding-bottom: var(--spacing-2);
        }

        .faq-question {
            font-size: 1.2rem;
            font-weight: bold;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: var(--spacing-1) 0;
            color: var(--text-color);
        }
        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            transition: transform 0.2s ease-in-out;
        }

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

        .faq-answer {
            font-size: 1rem;
            color: var(--light-text-color);
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-in-out, padding 0.3s ease-in-out;
            padding-top: 0;
        }

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

        /* Footer */
        footer {
            background-color: var(--text-color);
            color: #ffffff;
            padding: var(--spacing-4) 0 var(--spacing-2) 0;
            font-size: 0.9rem;
        }

        footer .container {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-3);
        }

        .footer-logo {
            font-size: 1.8rem;
            font-weight: bold;
            margin-bottom: var(--spacing-2);
        }

        .footer-links h4, .footer-contact h4 {
            font-size: 1.1rem;
            margin-bottom: var(--spacing-2);
            color: var(--primary-color);
        }

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

        .footer-links li {
            margin-bottom: var(--spacing-1);
        }

        .footer-links a, .footer-contact a {
            color: #ffffff;
            transition: color 0.2s ease-in-out;
        }

        .footer-links a:hover, .footer-contact a:hover {
            color: var(--accent-color);
            text-decoration: underline;
        }

        .footer-contact p, .footer-contact span {
            margin-bottom: var(--spacing-1);
        }

        .footer-copyright {
            text-align: center;
            margin-top: var(--spacing-4);
            padding-top: var(--spacing-2);
            border-top: 1px solid var(--secondary-color);
            color: var(--light-text-color);
        }

        .footer-copyright a {
            color: var(--light-text-color);
        }
        .footer-copyright a:hover {
            color: #ffffff;
        }


        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .mobile-nav-toggle {
                display: block;
            }
            header .container {
                flex-wrap: wrap;
            }
            .logo {
                width: 100%;
                text-align: center;
                margin-bottom: var(--spacing-1);
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            footer .container {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .footer-logo, .footer-links, .footer-contact {
                margin-bottom: var(--spacing-3);
            }
            .footer-links ul, .footer-contact p {
                display: inline-block; /* To keep elements on same line if possible */
            }
            .footer-links li, .footer-contact p {
                margin-bottom: var(--spacing-2);
            }
        }

/* roulang page: category5 */
:root {
            --primary-color: #007bff;
            --secondary-color: #6c757d;
            --background-light: #f8f9fa;
            --background-dark: #ffffff;
            --text-color: #333;
            --text-muted: #6c757d;
            --border-color: #dee2e6;
            --card-background: #ffffff;
            --footer-background: #e9ecef;
            --header-background: #ffffff;
            --primary-hover: #0056b3;
            --button-text: #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;
            --container-max-width: 1140px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--background-light);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

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

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

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

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

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

        /* Header & Navigation */
        header {
            background-color: var(--header-background);
            box-shadow: var(--shadow-sm);
            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: 700;
            color: var(--primary-color);
            white-space: nowrap;
            margin-right: var(--spacing-unit);
        }

        .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;
            transition: color 0.2s ease-in-out;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--primary-color);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--primary-color);
        }

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

        .mobile-menu {
            display: none;
            list-style: none;
            background-color: var(--background-dark);
            padding: var(--spacing-unit) 0;
            text-align: center;
            box-shadow: var(--shadow-md);
        }

        .mobile-menu a {
            display: block;
            padding: var(--spacing-unit);
            color: var(--text-color);
            font-weight: 500;
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            background-color: var(--background-light);
            color: var(--primary-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) * 6) 0;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1;
        }

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

        .hero h1 {
            font-size: 3rem;
            margin-bottom: calc(var(--spacing-unit) * 1.5);
            font-weight: 700;
        }

        .hero p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto;
            color: rgba(255, 255, 255, 0.9);
        }

        /* Main Content Area */
        main {
            flex-grow: 1;
            padding: calc(var(--spacing-unit) * 3) 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: calc(var(--spacing-unit) * 2.5);
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary-color);
        }

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

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

        .card-content {
            padding: calc(var(--spacing-unit) * 1.5);
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .card-content h3 {
            font-size: 1.4rem;
            margin-bottom: var(--spacing-unit);
            color: var(--primary-color);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

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

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

        .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: var(--spacing-unit);
        }

        .tag {
            background-color: var(--primary-color);
            color: var(--button-text);
            padding: 0.3rem 0.8rem;
            border-radius: calc(var(--border-radius) / 2);
            font-size: 0.85rem;
        }

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

        .faq-list {
            list-style: none;
            display: grid;
            grid-template-columns: 1fr;
            gap: var(--spacing-unit);
        }

        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            overflow: hidden;
        }

        .faq-question {
            background-color: var(--background-light);
            padding: calc(var(--spacing-unit) * 1.2);
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background-color 0.2s ease-in-out;
        }

        .faq-question:hover {
            background-color: #e9ecef;
        }

        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            transition: transform 0.2s ease-in-out;
        }

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

        .faq-answer {
            padding: calc(var(--spacing-unit) * 1.2);
            font-size: 0.95rem;
            color: var(--text-muted);
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
        }

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

        /* CTA Section */
        .cta-section {
            background-color: var(--primary-color);
            color: #fff;
            text-align: center;
            padding: calc(var(--spacing-unit) * 4) 0;
        }

        .cta-section h2 {
            font-size: 2.5rem;
            margin-bottom: calc(var(--spacing-unit) * 1.5);
        }

        .cta-section p {
            font-size: 1.1rem;
            margin-bottom: calc(var(--spacing-unit) * 2);
            opacity: 0.9;
        }

        .cta-button {
            display: inline-block;
            background-color: #ffffff;
            color: var(--primary-color);
            padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2.5);
            border-radius: var(--border-radius);
            font-size: 1.2rem;
            font-weight: 600;
            transition: background-color 0.2s ease-in-out, color 0.2s ease-in-out;
        }

        .cta-button:hover {
            background-color: #e9ecef;
            color: var(--primary-hover);
        }

        /* Footer */
        footer {
            background-color: var(--footer-background);
            color: var(--text-muted);
            padding: calc(var(--spacing-unit) * 3) 0;
            margin-top: auto; /* Pushes footer to the 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) * 2);
        }

        .footer-logo {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: var(--spacing-unit);
        }

        .footer-links h4,
        .footer-contact h4 {
            font-size: 1.2rem;
            color: var(--text-color);
            margin-bottom: var(--spacing-unit);
            font-weight: 700;
        }

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

        .footer-links li {
            margin-bottom: 0.6rem;
        }

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

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

        .footer-contact p,
        .footer-contact span {
            margin-bottom: 0.6rem;
        }

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

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

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

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

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

        /* Responsive Design */
        @media (max-width: 992px) {
            .nav-links {
                gap: calc(var(--spacing-unit) * 1);
            }
        }

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

            .nav-links {
                display: none;
            }

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

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

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

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

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

        @media (max-width: 576px) {
            .hero h1 {
                font-size: 2rem;
            }

            .hero p {
                font-size: 1rem;
            }

            .section-title {
                font-size: 1.8rem;
            }

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

            .card-content {
                padding: var(--spacing-unit);
            }

            .card img {
                height: 180px;
            }

            .faq-question {
                padding: calc(var(--spacing-unit) * 0.8);
                font-size: 1rem;
            }

            .faq-answer {
                padding: calc(var(--spacing-unit) * 0.8);
            }

            .cta-section h2 {
                font-size: 2rem;
            }

            .cta-section p {
                font-size: 1rem;
            }

            .cta-button {
                padding: calc(var(--spacing-unit) * 0.8) calc(var(--spacing-unit) * 2);
                font-size: 1.1rem;
            }
        }