* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #2a4365;
            --secondary-color: #3182ce;
            --accent-color: #ed8936;
            --text-color: #2d3748;
            --light-bg: #f7fafc;
            --dark-bg: #1a202c;
            --border-color: #e2e8f0;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: var(--light-bg);
        }
        a {
            color: var(--secondary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--accent-color);
        }
        .desktop-nav {
            display: flex;
            gap: 2rem;
        }
        .desktop-nav a {
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        .desktop-nav a:hover {
            background-color: var(--light-bg);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            cursor: pointer;
            color: var(--primary-color);
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            gap: 1rem;
            padding: 1rem 0;
            border-top: 1px solid var(--border-color);
        }
        .mobile-nav.active {
            display: flex;
        }
        .breadcrumb {
            background-color: #edf2f7;
            padding: 1rem 0;
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: ">";
            margin-left: 0.5rem;
            color: #718096;
        }
        main {
            background: white;
            border-radius: 8px;
            box-shadow: var(--shadow);
            overflow: hidden;
            margin-bottom: 2rem;
        }
        .article-header {
            padding: 2rem;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
        }
        .article-header h1 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }
        .article-meta {
            display: flex;
            gap: 1rem;
            font-size: 0.9rem;
            opacity: 0.9;
        }
        .article-content {
            padding: 2rem;
        }
        .article-content h2 {
            color: var(--primary-color);
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        .article-content h3 {
            color: var(--secondary-color);
            margin: 1.5rem 0 1rem;
        }
        .article-content p {
            margin-bottom: 1.5rem;
        }
        .article-content ul, .article-content ol {
            margin-bottom: 1.5rem;
            padding-left: 2rem;
        }
        .article-content li {
            margin-bottom: 0.5rem;
        }
        .highlight-box {
            background-color: #ebf8ff;
            border-left: 4px solid var(--secondary-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 4px 4px 0;
        }
        .feature-image {
            width: 100%;
            max-width: 800px;
            margin: 2rem auto;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .feature-image figcaption {
            text-align: center;
            font-style: italic;
            padding: 0.5rem;
            background-color: var(--light-bg);
        }
        .search-section {
            background-color: var(--light-bg);
            padding: 2rem;
            border-radius: 8px;
            margin: 2rem 0;
            text-align: center;
        }
        .search-form {
            max-width: 600px;
            margin: 1rem auto;
            display: flex;
            gap: 10px;
        }
        .search-form input {
            flex: 1;
            padding: 0.8rem 1rem;
            border: 2px solid var(--border-color);
            border-radius: 4px;
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--primary-color);
        }
        .interactive-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }
        .comment-section, .rating-section {
            background-color: var(--light-bg);
            padding: 2rem;
            border-radius: 8px;
        }
        .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 1rem;
        }
        .comment-form textarea, .rating-form select {
            padding: 1rem;
            border: 2px solid var(--border-color);
            border-radius: 4px;
            font-family: inherit;
            font-size: 1rem;
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 1.5rem;
            color: #e2e8f0;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #f6ad55;
        }
        .submit-btn {
            background-color: var(--accent-color);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 4px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .submit-btn:hover {
            background-color: #dd6b20;
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 3rem 0;
        }
        .web-link {
            background: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .web-link:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
        }
        footer {
            background-color: var(--dark-bg);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #4a5568;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .search-form {
                flex-direction: column;
            }
            .interactive-section {
                grid-template-columns: 1fr;
            }
            .footer-links {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            .article-header {
                padding: 1.5rem;
            }
            .article-content {
                padding: 1.5rem;
            }
            .article-header h1 {
                font-size: 1.8rem;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.6s ease-out;
        }
        .text-center { text-align: center; }
        .text-bold { font-weight: 700; }
        .text-accent { color: var(--accent-color); }
        .bg-light { background-color: var(--light-bg); }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .p-1 { padding: 1rem; }
        .p-2 { padding: 2rem; }