* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #2c3e50;
            --secondary: #e74c3c;
            --accent: #3498db;
            --light: #ecf0f1;
            --dark: #2c3e50;
            --gray: #95a5a6;
            --success: #27ae60;
            --warning: #f39c12;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --radius: 8px;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f9f9f9;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 15px;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary) 0%, #1a2530 100%);
            color: white;
            padding: 1.5rem 0;
            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;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--secondary);
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        .nav-desktop a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--radius);
        }
        .nav-desktop a:hover {
            background-color: rgba(255,255,255,0.1);
            color: var(--light);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .nav-mobile {
            display: none;
            width: 100%;
            flex-direction: column;
            background-color: var(--dark);
            padding: 1rem;
            margin-top: 1rem;
            border-radius: var(--radius);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: white;
            padding: 0.8rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .breadcrumb {
            background-color: var(--light);
            padding: 1rem;
            border-radius: var(--radius);
            margin: 1rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--dark);
        }
        .search-container {
            background-color: white;
            padding: 2rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin: 2rem 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex: 1;
            padding: 1rem;
            border: 2px solid var(--gray);
            border-right: none;
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
        }
        .search-btn {
            background-color: var(--accent);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: #2980b9;
        }
        .content-container {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            margin: 2rem 0;
        }
        @media (max-width: 992px) {
            .content-container {
                grid-template-columns: 1fr;
            }
        }
        .main-content {
            background-color: white;
            padding: 2rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .sidebar {
            background-color: white;
            padding: 1.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--primary);
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--accent);
        }
        h3 {
            font-size: 1.8rem;
            color: var(--dark);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: var(--dark);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--primary);
            background-color: rgba(52, 152, 219, 0.1);
            padding: 1.5rem;
            border-radius: var(--radius);
            border-left: 4px solid var(--accent);
            margin: 2rem 0;
        }
        .highlight {
            background-color: rgba(243, 156, 18, 0.15);
            padding: 1.5rem;
            border-radius: var(--radius);
            border-left: 4px solid var(--warning);
            margin: 1.5rem 0;
        }
        .stat-box {
            background: linear-gradient(135deg, var(--primary) 0%, #34495e 100%);
            color: white;
            padding: 1.5rem;
            border-radius: var(--radius);
            text-align: center;
            margin: 1.5rem 0;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--secondary);
            display: block;
        }
        .example-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .example-card {
            background-color: var(--light);
            border-radius: var(--radius);
            padding: 1.5rem;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .example-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
            border-color: var(--accent);
        }
        .article-image {
            width: 100%;
            border-radius: var(--radius);
            margin: 2rem 0;
            box-shadow: var(--shadow);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .tab-container {
            margin: 2rem 0;
        }
        .tab-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }
        .tab-btn {
            padding: 0.8rem 1.5rem;
            background-color: var(--light);
            border: none;
            border-radius: var(--radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .tab-btn.active {
            background-color: var(--accent);
            color: white;
        }
        .tab-content {
            display: none;
            padding: 1.5rem;
            background-color: var(--light);
            border-radius: var(--radius);
        }
        .tab-content.active {
            display: block;
            animation: fadeIn 0.5s ease;
        }
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        .rating-container, .comment-container {
            background-color: white;
            padding: 2rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin: 2rem 0;
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: var(--gray);
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: var(--warning);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-input {
            width: 100%;
            padding: 1rem;
            border: 2px solid var(--gray);
            border-radius: var(--radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus {
            border-color: var(--accent);
            outline: none;
        }
        .submit-btn {
            background-color: var(--secondary);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: var(--radius);
            cursor: pointer;
            font-weight: 600;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .submit-btn:hover {
            background-color: #c0392b;
            transform: translateY(-2px);
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1.5rem;
            margin: 3rem 0;
            padding: 2rem 0;
            border-top: 2px solid var(--light);
            border-bottom: 2px solid var(--light);
        }
        .web-link {
            background-color: white;
            padding: 1.2rem;
            border-radius: var(--radius);
            box-shadow: 0 2px 6px rgba(0,0,0,0.05);
            transition: var(--transition);
        }
        .web-link:hover {
            transform: translateX(5px);
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .site-footer {
            background-color: var(--primary);
            color: white;
            padding: 3rem 0 2rem;
            margin-top: 3rem;
            border-radius: var(--radius) var(--radius) 0 0;
        }
        .footer-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 2rem;
        }
        .copyright {
            color: var(--gray);
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .header-container {
                flex-direction: column;
                align-items: flex-start;
            }
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
                position: absolute;
                right: 15px;
                top: 1.5rem;
            }
            .example-grid {
                grid-template-columns: 1fr;
            }
            .search-form {
                flex-direction: column;
            }
            .search-input {
                border-radius: var(--radius);
                border-right: 2px solid var(--gray);
                margin-bottom: 1rem;
            }
            .search-btn {
                border-radius: var(--radius);
            }
        }