:root {
            --primary-color: #2c3e50;
            --secondary-color: #3498db;
            --accent-color: #e74c3c;
            --light-color: #ecf0f1;
            --dark-color: #2c3e50;
            --text-color: #333;
            --text-light: #7f8c8d;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --border-radius: 8px;
            --max-width: 1200px;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
        }
        * {
            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: #f9f9f9;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--secondary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
            text-decoration: underline;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }
        .site-header {
            background-color: var(--primary-color);
            color: white;
            padding: var(--spacing-sm) 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--secondary-color);
        }
        .my-logo:hover {
            text-decoration: none;
            color: var(--light-color);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: var(--spacing-md);
        }
        .main-nav a {
            color: white;
            font-weight: 500;
            padding: var(--spacing-xs) var(--spacing-sm);
            border-radius: var(--border-radius);
        }
        .main-nav a:hover,
        .main-nav a.active {
            background-color: rgba(255, 255, 255, 0.1);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: var(--spacing-sm);
            margin-bottom: var(--spacing-md);
            border-radius: var(--border-radius);
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--secondary-color);
        }
        .search-container {
            background: linear-gradient(135deg, var(--secondary-color), #2980b9);
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            margin: var(--spacing-md) 0;
            text-align: center;
            color: white;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.8rem 1rem;
            border: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-btn {
            background-color: var(--accent-color);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
            font-size: 1rem;
        }
        .search-btn:hover {
            background-color: #c0392b;
        }
        main {
            flex-grow: 1;
            padding: var(--spacing-md) 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: var(--spacing-lg);
            padding-bottom: var(--spacing-md);
            border-bottom: 2px solid var(--light-color);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: var(--spacing-sm);
            line-height: 1.2;
        }
        .article-lead {
            font-size: 1.2rem;
            color: var(--text-light);
            max-width: 800px;
            margin: 0 auto var(--spacing-md);
            font-style: italic;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: var(--spacing-md);
            color: var(--text-light);
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .featured-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: var(--border-radius);
            margin: var(--spacing-md) 0;
            box-shadow: var(--shadow);
        }
        .article-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: var(--spacing-lg);
        }
        @media (max-width: 992px) {
            .article-content {
                grid-template-columns: 1fr;
            }
        }
        .content-main h2 {
            font-size: 2rem;
            color: var(--primary-color);
            margin: var(--spacing-md) 0 var(--spacing-sm);
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--light-color);
        }
        .content-main h3 {
            font-size: 1.5rem;
            color: var(--secondary-color);
            margin: var(--spacing-sm) 0 var(--spacing-xs);
        }
        .content-main h4 {
            font-size: 1.2rem;
            color: var(--accent-color);
            margin: var(--spacing-sm) 0 var(--spacing-xs);
        }
        .content-main p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .content-main blockquote {
            border-left: 4px solid var(--secondary-color);
            padding-left: var(--spacing-md);
            margin: var(--spacing-md) 0;
            font-style: italic;
            color: var(--text-light);
            background-color: rgba(52, 152, 219, 0.05);
            padding: var(--spacing-sm);
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .content-main ul, .content-main ol {
            margin-left: var(--spacing-md);
            margin-bottom: var(--spacing-md);
        }
        .content-main li {
            margin-bottom: 0.5rem;
        }
        .highlight {
            background-color: #fffacd;
            padding: 2px 5px;
            border-radius: 3px;
            font-weight: bold;
        }
        .inline-link {
            font-weight: 600;
            border-bottom: 1px dotted var(--secondary-color);
        }
        .info-box {
            background-color: var(--light-color);
            border-left: 5px solid var(--secondary-color);
            padding: var(--spacing-md);
            margin: var(--spacing-md) 0;
            border-radius: var(--border-radius);
        }
        .info-box h3 {
            margin-top: 0;
            color: var(--primary-color);
        }
        .content-sidebar {
            background-color: white;
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            height: fit-content;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: var(--spacing-md);
        }
        .sidebar-widget h3 {
            font-size: 1.2rem;
            color: var(--primary-color);
            margin-bottom: var(--spacing-sm);
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--light-color);
        }
        .quick-facts ul {
            list-style: none;
            margin-left: 0;
        }
        .quick-facts li {
            padding: 0.5rem 0;
            border-bottom: 1px dashed #eee;
        }
        .quick-facts strong {
            color: var(--primary-color);
            min-width: 100px;
            display: inline-block;
        }
        .related-links a {
            display: block;
            padding: 0.7rem;
            background-color: #f8f9fa;
            margin-bottom: 0.5rem;
            border-radius: var(--border-radius);
            border-left: 3px solid var(--secondary-color);
        }
        .related-links a:hover {
            background-color: #e9ecef;
            text-decoration: none;
            border-left-color: var(--accent-color);
        }
        .interactive-section {
            background-color: white;
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin: var(--spacing-lg) 0;
        }
        .section-title {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: var(--spacing-md);
            color: var(--primary-color);
        }
        .rating-container {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
            margin-bottom: var(--spacing-md);
        }
        .star-rating {
            display: flex;
            direction: ltr;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #ddd;
            font-size: 2rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label {
            color: #f1c40f;
        }
        .rating-form,
        .comment-form {
            display: grid;
            gap: var(--spacing-sm);
            margin-top: var(--spacing-md);
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-control {
            padding: 0.8rem;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--secondary-color);
            outline: none;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        textarea.form-control {
            min-height: 120px;
            resize: vertical;
        }
        .submit-btn {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: var(--transition);
            justify-self: start;
        }
        .submit-btn:hover {
            background-color: #2980b9;
            text-decoration: none;
        }
        .comments-list {
            margin-top: var(--spacing-md);
        }
        .comment {
            background-color: #f8f9fa;
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            margin-bottom: var(--spacing-sm);
            border-left: 4px solid var(--secondary-color);
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.5rem;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .comment-author {
            font-weight: bold;
            color: var(--primary-color);
        }
        .site-footer {
            background-color: var(--dark-color);
            color: var(--light-color);
            padding: var(--spacing-lg) 0 var(--spacing-md);
            margin-top: var(--spacing-lg);
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-lg);
        }
        .footer-widget h3 {
            color: white;
            margin-bottom: var(--spacing-md);
            font-size: 1.2rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.7rem;
        }
        .footer-links a {
            color: #bdc3c7;
        }
        .footer-links a:hover {
            color: white;
            text-decoration: none;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.1);
            padding: var(--spacing-sm);
            border-radius: var(--border-radius);
            margin-bottom: 0.5rem;
        }
        friend-link a {
            color: #3498db;
            font-weight: 500;
        }
        .copyright {
            text-align: center;
            padding-top: var(--spacing-md);
            margin-top: var(--spacing-md);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #95a5a6;
            font-size: 0.9rem;
        }
        .text-center { text-align: center; }
        .text-bold { font-weight: 700; }
        .text-italic { font-style: italic; }
        .emoji { font-size: 1.2em; }
        .mb-1 { margin-bottom: var(--spacing-xs); }
        .mb-2 { margin-bottom: var(--spacing-sm); }
        .mb-3 { margin-bottom: var(--spacing-md); }
        .mb-4 { margin-bottom: var(--spacing-lg); }
        @media (max-width: 768px) {
            html { font-size: 14px; }
            h1 { font-size: 2.2rem; }
            .header-container { flex-direction: column; align-items: flex-start; }
            .main-nav { width: 100%; margin-top: var(--spacing-sm); display: none; }
            .main-nav.active { display: block; }
            .main-nav ul { flex-direction: column; gap: 0; }
            .main-nav li { width: 100%; }
            .main-nav a { display: block; padding: 0.8rem; border-bottom: 1px solid rgba(255,255,255,0.1); }
            .hamburger { display: block; }
            .search-form { flex-direction: column; }
            .search-input, .search-btn { border-radius: var(--border-radius); width: 100%; }
            .search-btn { margin-top: 10px; padding: 0.8rem; }
            .article-meta { flex-direction: column; gap: 0.5rem; align-items: center; }
            .featured-image { max-height: 300px; }
            .star-rating label { font-size: 1.5rem; }
        }