:root {
            --primary: #2c3e50;
            --secondary: #e74c3c;
            --accent: #3498db;
            --light: #ecf0f1;
            --dark: #1a1a2e;
            --gray: #7f8c8d;
            --success: #27ae60;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 3rem;
            --spacing-xl: 5rem;
            --border-radius: 8px;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --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: 1.8;
            color: #333;
            background-color: #f9f9f9;
            max-width: 1400px;
            margin: 0 auto;
            overflow-x: hidden;
        }
        .site-header {
            background-color: var(--primary);
            color: white;
            padding: var(--spacing-sm) var(--spacing-md);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 700;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
            transition: var(--transition);
        }
        .my-logo:hover {
            color: var(--accent);
            transform: scale(1.05);
        }
        .my-logo i {
            color: var(--secondary);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .main-nav a:hover,
        .main-nav a.active {
            background-color: var(--accent);
            color: white;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            padding: var(--spacing-sm) var(--spacing-md);
            background-color: var(--light);
            font-size: 0.9rem;
            color: var(--gray);
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .search-container {
            background: white;
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            margin: var(--spacing-md);
            box-shadow: var(--shadow);
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex: 1;
            padding: 1rem;
            border: 2px solid var(--primary);
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
            outline: none;
        }
        .search-button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 1rem 1.5rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: var(--secondary);
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: var(--spacing-lg);
            padding: var(--spacing-md);
        }
        @media (max-width: 1024px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
        }
        .main-content {
            background: white;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .sidebar {
            background: white;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1 {
            color: var(--primary);
            font-size: 2.8rem;
            margin-bottom: var(--spacing-md);
            border-bottom: 4px solid var(--secondary);
            padding-bottom: var(--spacing-sm);
            line-height: 1.3;
        }
        h2 {
            color: var(--primary);
            font-size: 2rem;
            margin: var(--spacing-lg) 0 var(--spacing-md);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent);
        }
        h3 {
            color: var(--dark);
            font-size: 1.6rem;
            margin: var(--spacing-md) 0 var(--spacing-sm);
        }
        h4 {
            color: var(--gray);
            font-size: 1.3rem;
            margin: var(--spacing-sm) 0;
        }
        p {
            margin-bottom: var(--spacing-md);
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--primary);
            background-color: var(--light);
            padding: var(--spacing-md);
            border-left: 5px solid var(--accent);
            border-radius: var(--border-radius);
            margin-bottom: var(--spacing-lg);
        }
        .highlight {
            background-color: #fffacd;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--border-radius);
            margin: var(--spacing-md) auto;
            display: block;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .article-image:hover {
            transform: scale(1.01);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: var(--spacing-xs);
            margin-bottom: var(--spacing-md);
        }
        .content-link {
            color: var(--accent);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 2px dotted var(--accent);
            transition: var(--transition);
        }
        .content-link:hover {
            color: var(--secondary);
            border-bottom-style: solid;
        }
        .blockquote {
            border-left: 5px solid var(--secondary);
            padding: var(--spacing-md);
            margin: var(--spacing-lg) 0;
            background-color: var(--light);
            font-style: italic;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .blockquote cite {
            display: block;
            margin-top: var(--spacing-sm);
            font-weight: 600;
            color: var(--primary);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: var(--spacing-md);
            margin: var(--spacing-lg) 0;
        }
        .stat-card {
            background: var(--primary);
            color: white;
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            text-align: center;
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
            background: var(--dark);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--secondary);
            display: block;
        }
        .stat-label {
            font-size: 1rem;
            margin-top: var(--spacing-xs);
        }
        .user-interaction {
            background: var(--light);
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            margin: var(--spacing-lg) 0;
        }
        .rating-container {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            margin-bottom: var(--spacing-md);
            flex-wrap: wrap;
        }
        .stars {
            display: flex;
            gap: 0.2rem;
        }
        .star {
            color: var(--gray);
            font-size: 1.8rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: gold;
        }
        .comment-form,
        .rating-form {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            margin-top: var(--spacing-md);
        }
        .form-input,
        .form-textarea {
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus,
        .form-textarea:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 1rem 1.5rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            align-self: flex-start;
        }
        .submit-button:hover {
            background-color: var(--secondary);
        }
        .site-footer {
            background-color: var(--dark);
            color: white;
            padding: var(--spacing-xl) var(--spacing-md) var(--spacing-md);
            margin-top: var(--spacing-xl);
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: white;
            margin-bottom: var(--spacing-sm);
        }
        .footer-links h4 {
            color: var(--light);
            margin-bottom: var(--spacing-sm);
            border-bottom: 2px solid var(--accent);
            padding-bottom: 0.5rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
            display: block;
            padding: 0.3rem 0;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 0.5rem;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.1);
            padding: var(--spacing-sm);
            margin: 0.5rem 0;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        friend-link:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateX(5px);
        }
        friend-link a {
            color: var(--accent);
            text-decoration: none;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        .last-updated {
            color: var(--secondary);
            font-weight: 600;
            margin-top: var(--spacing-xs);
        }
        @media (max-width: 768px) {
            html {
                font-size: 14px;
            }
            h1 {
                font-size: 2.2rem;
            }
            .header-container {
                flex-direction: column;
                align-items: flex-start;
                gap: var(--spacing-sm);
            }
            .main-nav ul {
                flex-direction: column;
                width: 100%;
                display: none;
                gap: 0;
            }
            .main-nav.active ul {
                display: flex;
                margin-top: var(--spacing-sm);
            }
            .main-nav a {
                padding: 0.8rem;
                border-radius: 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            .hamburger {
                display: block;
                position: absolute;
                top: var(--spacing-sm);
                right: var(--spacing-md);
            }
            .content-wrapper {
                padding: var(--spacing-sm);
            }
            .main-content,
            .sidebar {
                padding: var(--spacing-md);
            }
            .sidebar {
                position: static;
            }
        }
        @media print {
            .site-header,
            .search-container,
            .sidebar,
            .user-interaction,
            .site-footer {
                display: none;
            }
            body {
                background: white;
                color: black;
                max-width: 100%;
            }
            .main-content {
                box-shadow: none;
                padding: 0;
            }
            a {
                color: black;
                text-decoration: underline;
            }
        }