:root {
            --primary-color: #0056B3; 
            --secondary-color: #FFCC00; 
            --dark-color: #1A1A2E;
            --light-color: #F8F9FA;
            --text-color: #333;
            --text-light: #666;
            --border-color: #DEE2E6;
            --success-color: #28A745;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --border-radius: 8px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: var(--light-color);
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: #FFF;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--secondary-color);
        }
        .logo:hover {
            color: var(--dark-color);
        }
        .breadcrumb {
            padding: 10px 0;
            font-size: 0.9rem;
            color: var(--text-light);
            background-color: #f1f5f9;
            margin-bottom: 20px;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .nav-desktop {
            display: flex;
            gap: 25px;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            color: var(--dark-color);
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            position: relative;
            padding: 5px 0;
            transition: var(--transition);
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: width 0.3s ease;
        }
        .nav-desktop a:hover {
            color: var(--primary-color);
        }
        .nav-desktop a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--dark-color);
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: white;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: var(--shadow);
            padding: 20px;
            z-index: 999;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            padding: 12px 0;
            border-bottom: 1px solid var(--border-color);
            color: var(--dark-color);
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
        }
        .nav-mobile a:hover {
            color: var(--primary-color);
            padding-left: 10px;
        }
        main {
            padding: 30px 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: #FFF;
            padding: 30px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-content h1 {
            font-size: 2.5rem;
            color: var(--dark-color);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        @media (max-width: 768px) {
            .article-content h1 {
                font-size: 2rem;
            }
        }
        .article-meta {
            color: var(--text-light);
            font-size: 0.95rem;
            margin-bottom: 30px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .intro {
            font-size: 1.2rem;
            color: var(--primary-color);
            font-weight: 600;
            margin-bottom: 30px;
            padding: 15px;
            background-color: #E8F4FF;
            border-left: 4px solid var(--primary-color);
            border-radius: var(--border-radius);
        }
        .featured-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: var(--border-radius);
            margin: 30px 0;
            box-shadow: 0 6px 18px rgba(0, 0, 0, 0.1);
        }
        h2, h3, h4 {
            color: var(--dark-color);
            margin-top: 40px;
            margin-bottom: 15px;
            position: relative;
            padding-bottom: 10px;
        }
        h2 {
            font-size: 1.8rem;
            border-bottom: 2px solid var(--secondary-color);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--primary-color);
        }
        h4 {
            font-size: 1.2rem;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .highlight {
            background-color: #FFF9E6;
            padding: 20px;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--secondary-color);
            margin: 25px 0;
        }
        .highlight strong {
            color: var(--dark-color);
        }
        ul, ol {
            margin-left: 25px;
            margin-bottom: 20px;
        }
        li {
            margin-bottom: 8px;
        }
        a.content-link {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 1px dotted var(--primary-color);
            transition: var(--transition);
        }
        a.content-link:hover {
            color: var(--secondary-color);
            border-bottom: 1px solid var(--secondary-color);
        }
        .quote {
            font-style: italic;
            padding: 25px;
            background: #F8F9FA;
            border-radius: var(--border-radius);
            margin: 30px 0;
            position: relative;
            border-left: 4px solid var(--primary-color);
        }
        .quote::before {
            content: "\201C";
            font-size: 4rem;
            color: var(--secondary-color);
            position: absolute;
            left: 15px;
            top: -15px;
            opacity: 0.5;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 25px 0;
            box-shadow: 0 0 10px rgba(0,0,0,0.05);
        }
        .data-table th, .data-table td {
            padding: 15px;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        .data-table th {
            background-color: var(--primary-color);
            color: white;
            font-weight: 600;
        }
        .data-table tr:nth-child(even) {
            background-color: #F8F9FA;
        }
        .data-table tr:hover {
            background-color: #E8F4FF;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background: #FFF;
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            margin-top: 0;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-color);
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex: 1;
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--dark-color);
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            font-size: 1.8rem;
            color: #FFD700;
            margin: 15px 0;
            cursor: pointer;
        }
        .stars i {
            margin: 0 2px;
            transition: var(--transition);
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        .rating-form {
            display: none;
            margin-top: 15px;
        }
        .rating-form.active {
            display: block;
        }
        .rating-form input, .rating-form textarea {
            width: 100%;
            padding: 10px;
            margin-bottom: 10px;
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
        }
        .rating-form button {
            background-color: var(--success-color);
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: var(--border-radius);
            cursor: pointer;
            width: 100%;
            transition: var(--transition);
        }
        .rating-form button:hover {
            background-color: #218838;
        }
        .comment-section {
            margin-top: 40px;
            padding-top: 30px;
            border-top: 2px solid var(--border-color);
        }
        .comment-form input, .comment-form textarea {
            width: 100%;
            padding: 12px 15px;
            margin-bottom: 15px;
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            font-family: inherit;
        }
        .comment-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .comment-form button:hover {
            background-color: var(--dark-color);
        }
        .comment-list {
            margin-top: 30px;
        }
        .comment {
            background: #F8F9FA;
            padding: 20px;
            border-radius: var(--border-radius);
            margin-bottom: 20px;
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
            color: var(--text-light);
            font-size: 0.9rem;
        }
        footer {
            background-color: var(--dark-color);
            color: #CCC;
            padding: 50px 0 20px;
            margin-top: 50px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            margin-bottom: 15px;
            display: inline-block;
        }
        .footer-about {
            line-height: 1.6;
        }
        friend-link {
            display: block;
            margin-top: 20px;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .friend-links a {
            color: #AAA;
            text-decoration: none;
            background: rgba(255,255,255,0.05);
            padding: 8px 15px;
            border-radius: 4px;
            transition: var(--transition);
        }
        .friend-links a:hover {
            color: white;
            background: rgba(255,255,255,0.1);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            margin-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #888;
        }
        @media (max-width: 576px) {
            .header-container, .article-content, .sidebar-widget {
                padding-left: 15px;
                padding-right: 15px;
            }
            .article-content {
                padding: 20px;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .intro {
                font-size: 1.1rem;
            }
        }
        .btn {
            display: inline-block;
            padding: 10px 20px;
            background-color: var(--primary-color);
            color: white;
            text-decoration: none;
            border-radius: var(--border-radius);
            font-weight: 600;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn:hover {
            background-color: var(--dark-color);
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }
        .tag {
            display: inline-block;
            background-color: #E8F4FF;
            color: var(--primary-color);
            padding: 5px 12px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-right: 8px;
            margin-bottom: 8px;
            transition: var(--transition);
        }
        .tag:hover {
            background-color: var(--primary-color);
            color: white;
        }
        .stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 15px;
            margin: 30px 0;
        }
        .stat-box {
            background: #FFF;
            padding: 20px;
            text-align: center;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            border-top: 4px solid var(--secondary-color);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-top: 5px;
        }