* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #1a365d;
            --secondary-color: #2d3748;
            --accent-color: #c53030;
            --light-color: #f7fafc;
            --dark-color: #1a202c;
            --text-color: #2d3748;
            --border-color: #e2e8f0;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--light-color);
            overflow-x: hidden;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            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 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Georgia', serif;
            font-size: 2rem;
            font-weight: bold;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo::before {
            content: "⚡";
            font-size: 1.8rem;
        }
        .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);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background-color: white;
            border-radius: 2px;
            transition: var(--transition);
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 0.75rem 1rem;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--accent-color);
            text-decoration: underline;
        }
        .breadcrumb li::after {
            content: "›";
            margin-left: 0.5rem;
            color: var(--secondary-color);
        }
        .breadcrumb li:last-child::after {
            content: "";
        }
        .main-container {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 1rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        .article-content {
            background: white;
            border-radius: 10px;
            padding: 2rem;
            box-shadow: var(--shadow);
        }
        h1 {
            color: var(--primary-color);
            font-size: 2.5rem;
            margin-bottom: 1rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--accent-color);
            padding-bottom: 0.5rem;
        }
        h2 {
            color: var(--secondary-color);
            font-size: 2rem;
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        h3 {
            color: var(--secondary-color);
            font-size: 1.5rem;
            margin: 1.5rem 0 1rem;
        }
        h4 {
            color: var(--secondary-color);
            font-size: 1.2rem;
            margin: 1.2rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--secondary-color);
            background-color: #f0f4f8;
            padding: 1rem;
            border-left: 4px solid var(--accent-color);
            border-radius: 4px;
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fff3cd;
            padding: 0.2rem 0.4rem;
            border-radius: 3px;
            font-weight: 600;
        }
        .article-image {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 1.5rem 0;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .article-image:hover {
            transform: scale(1.01);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: -0.5rem;
            margin-bottom: 1.5rem;
        }
        .content-link {
            color: var(--accent-color);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }
        .content-link:hover {
            text-decoration: underline;
            color: #9b2c2c;
        }
        .sidebar {
            background: white;
            border-radius: 10px;
            padding: 1.5rem;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .sidebar-section {
            margin-bottom: 2rem;
        }
        .sidebar h3 {
            font-size: 1.2rem;
            margin-bottom: 1rem;
            color: var(--primary-color);
        }
        .related-links {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px solid var(--border-color);
        }
        .related-links a {
            color: var(--text-color);
            text-decoration: none;
            transition: var(--transition);
            display: block;
        }
        .related-links a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        .search-form {
            display: flex;
            margin-bottom: 1.5rem;
        }
        .search-input {
            flex: 1;
            padding: 0.75rem;
            border: 1px solid var(--border-color);
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: var(--secondary-color);
        }
        .rating-system {
            background-color: #f8f9fa;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
            border: 1px solid var(--border-color);
        }
        .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;
        }
        .rating-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 4px;
            cursor: pointer;
            transition: var(--transition);
            margin-top: 1rem;
        }
        .rating-button:hover {
            background-color: var(--secondary-color);
        }
        .comments-section {
            margin-top: 3rem;
            background: white;
            border-radius: 10px;
            padding: 2rem;
            box-shadow: var(--shadow);
        }
        .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-bottom: 2rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-input {
            padding: 0.75rem;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-size: 1rem;
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-button {
            background-color: var(--accent-color);
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 4px;
            cursor: pointer;
            transition: var(--transition);
            align-self: flex-start;
        }
        .submit-button:hover {
            background-color: #9b2c2c;
        }
        .comment {
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 1rem;
            margin-bottom: 1rem;
            background-color: #f8f9fa;
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.5rem;
        }
        .comment-author {
            font-weight: bold;
            color: var(--primary-color);
        }
        .comment-date {
            color: #666;
            font-size: 0.9rem;
        }
        .site-footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 1rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 1rem;
            font-size: 1.2rem;
        }
        friend-link {
            display: block;
            margin-bottom: 0.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links a {
            color: #cbd5e0;
            text-decoration: none;
            transition: var(--transition);
            display: block;
            margin-bottom: 0.5rem;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            margin-top: 2rem;
            padding-top: 2rem;
            border-top: 1px solid #4a5568;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        .update-time {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background-color: #e6fffa;
            color: #234e52;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-size: 0.9rem;
            margin-bottom: 1.5rem;
        }
        @media (max-width: 768px) {
            .main-container {
                grid-template-columns: 1fr;
            }
            .hamburger {
                display: flex;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: var(--primary-color);
                flex-direction: column;
                padding: 1rem;
                box-shadow: var(--shadow);
            }
            .main-nav.active {
                display: flex;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            .sidebar {
                position: static;
            }
        }
        @media print {
            .site-header,
            .sidebar,
            .search-form,
            .rating-system,
            .comments-section,
            .site-footer {
                display: none;
            }
            .main-container {
                grid-template-columns: 1fr;
                margin: 0;
                padding: 0;
            }
            .article-content {
                box-shadow: none;
                padding: 0;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .article-content {
            animation: fadeIn 0.5s ease-out;
        }
        .text-center { text-align: center; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .py-1 { padding-top: 1rem; padding-bottom: 1rem; }
        .px-1 { padding-left: 1rem; padding-right: 1rem; }