* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #1a365d;
            --secondary-color: #2d3748;
            --accent-color: #e53e3e;
            --gold-color: #d69e2e;
            --light-bg: #f7fafc;
            --text-color: #2d3748;
            --text-light: #718096;
            --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, Cantarell, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: var(--light-bg);
            font-size: 16px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-color) 0%, #2d3748 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .my-logo i {
            color: var(--gold-color);
        }
        .main-nav {
            display: flex;
            gap: 2rem;
        }
        .nav-link {
            color: white;
            text-decoration: none;
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-link:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: white;
            padding: 1rem 1.5rem;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--text-light);
        }
        .search-container {
            max-width: 600px;
            margin: 2rem auto;
            padding: 0 1.5rem;
        }
        .search-form {
            display: flex;
            gap: 0;
            box-shadow: var(--shadow);
            border-radius: 8px;
            overflow: hidden;
        }
        .search-input {
            flex: 1;
            padding: 1rem;
            border: 2px solid var(--border-color);
            border-right: none;
            font-size: 1rem;
            border-radius: 8px 0 0 8px;
        }
        .search-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.5rem;
            cursor: pointer;
            transition: var(--transition);
            border-radius: 0 8px 8px 0;
        }
        .search-btn:hover {
            background-color: #2d3748;
        }
        .main-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            margin-top: 2rem;
        }
        .article-content {
            background: white;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: var(--shadow);
        }
        .sidebar {
            background: white;
            border-radius: 12px;
            padding: 1.5rem;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 1.8rem;
            color: var(--secondary-color);
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--gold-color);
        }
        h3 {
            font-size: 1.4rem;
            color: var(--secondary-color);
            margin: 1.5rem 0 1rem;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--secondary-color);
            margin: 1.2rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fffaf0;
            border-left: 4px solid var(--gold-color);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .stat-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
            margin: 2rem 0;
        }
        .stat-item {
            background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
            padding: 1.5rem;
            border-radius: 8px;
            text-align: center;
            border: 1px solid var(--border-color);
        }
        .stat-value {
            font-size: 2rem;
            font-weight: bold;
            color: var(--primary-color);
            display: block;
        }
        .stat-label {
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .feature-card {
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 1.5rem;
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        .feature-icon {
            font-size: 2rem;
            color: var(--gold-color);
            margin-bottom: 1rem;
        }
        .related-links {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .related-links ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 0.5rem;
        }
        .related-links a {
            color: var(--primary-color);
            text-decoration: none;
            padding: 0.5rem;
            display: block;
            border-radius: 4px;
            transition: var(--transition);
        }
        .related-links a:hover {
            background-color: rgba(26, 54, 93, 0.1);
        }
        .article-image {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 2rem 0;
            box-shadow: var(--shadow);
        }
        .update-time {
            color: var(--text-light);
            font-style: italic;
            margin-bottom: 2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .rating-section {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            padding: 2rem;
            border-radius: 12px;
            margin: 2rem 0;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #ccc;
            font-size: 2rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: var(--gold-color);
        }
        .review-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 1.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-input, .form-textarea {
            padding: 0.8rem;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 1rem;
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            align-self: flex-start;
        }
        .submit-btn:hover {
            background-color: #2d3748;
            transform: translateY(-2px);
        }
        .quick-rating {
            text-align: center;
            margin-bottom: 2rem;
        }
        .rating-score {
            font-size: 3.5rem;
            font-weight: bold;
            color: var(--gold-color);
            line-height: 1;
        }
        .rating-stars {
            color: var(--gold-color);
            margin: 0.5rem 0;
        }
        .toc {
            margin: 1.5rem 0;
        }
        .toc ul {
            list-style: none;
            margin-left: 0;
        }
        .toc li {
            margin-bottom: 0.5rem;
        }
        .toc a {
            color: var(--text-color);
            text-decoration: none;
            padding: 0.5rem;
            display: block;
            border-radius: 4px;
            transition: var(--transition);
        }
        .toc a:hover {
            background-color: rgba(26, 54, 93, 0.1);
            color: var(--primary-color);
        }
        .site-footer {
            background: var(--primary-color);
            color: white;
            margin-top: 4rem;
            padding: 3rem 0 1.5rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        friend-link {
            display: block;
            margin: 1.5rem 0;
        }
        friend-link a {
            color: white;
            text-decoration: none;
            padding: 0.5rem 0;
            display: block;
            transition: var(--transition);
        }
        friend-link a:hover {
            color: var(--gold-color);
            padding-left: 0.5rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .main-container {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--primary-color);
                flex-direction: column;
                padding: 1rem;
                box-shadow: var(--shadow);
            }
            .main-nav.active {
                display: flex;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .stat-box {
                grid-template-columns: 1fr;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
        }
        @media print {
            .site-header,
            .search-container,
            .sidebar,
            .rating-section,
            .site-footer {
                display: none;
            }
            body {
                background: white;
                color: black;
                font-size: 12pt;
            }
            .article-content {
                box-shadow: none;
                padding: 0;
            }
        }