* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #1a365d;
            --secondary: #e53e3e;
            --accent: #d69e2e;
            --light: #f7fafc;
            --dark: #2d3748;
            --gray: #718096;
            --transition: all 0.3s ease;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --radius: 8px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
        }
        .header-container {
            background: var(--primary);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .top-bar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 5%;
            max-width: 1400px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .my-logo:hover {
            color: var(--accent);
            transform: translateY(-2px);
        }
        .my-logo i {
            color: var(--secondary);
        }
        .breadcrumb {
            padding: 0.8rem 5%;
            background: rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #cbd5e0;
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb span {
            color: var(--accent);
            margin: 0 8px;
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
            background: rgba(0, 0, 0, 0.2);
            padding: 0.8rem 5%;
            justify-content: center;
        }
        .nav-desktop a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--radius);
            transition: var(--transition);
            position: relative;
        }
        .nav-desktop a:hover {
            background: rgba(255, 255, 255, 0.15);
            color: var(--accent);
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
        }
        .nav-desktop a:hover::after {
            width: 80%;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 4px;
            cursor: pointer;
            padding: 5px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background: white;
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: var(--primary);
            padding: 1rem;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            box-shadow: var(--shadow);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: white;
            text-decoration: none;
            padding: 0.8rem 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            transition: var(--transition);
        }
        .nav-mobile a:hover {
            background: rgba(255, 255, 255, 0.1);
            padding-left: 1.5rem;
        }
        .container {
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 5%;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        .article-content {
            background: white;
            border-radius: var(--radius);
            padding: 2.5rem;
            box-shadow: var(--shadow);
            overflow: hidden;
        }
        h1 {
            color: var(--primary);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--accent);
            padding-bottom: 1rem;
        }
        h2 {
            color: var(--primary);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e2e8f0;
        }
        h3 {
            color: var(--dark);
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: var(--gray);
            font-size: 1.2rem;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            color: #4a5568;
        }
        .lead {
            font-size: 1.3rem;
            color: var(--primary);
            font-weight: 600;
            background: #f0f9ff;
            padding: 1.5rem;
            border-left: 4px solid var(--accent);
            border-radius: var(--radius);
            margin: 2rem 0;
        }
        .highlight {
            background: linear-gradient(120deg, #fffbeb 0%, #fef3c7 100%);
            padding: 1.5rem;
            border-radius: var(--radius);
            border: 1px solid #fbbf24;
            margin: 2rem 0;
        }
        .important {
            background: #fed7d7;
            border-left: 4px solid var(--secondary);
            padding: 1.5rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 2rem 0;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            border-bottom: 1px dotted transparent;
        }
        a:hover {
            color: #c53030;
            border-bottom-color: var(--secondary);
        }
        ul, ol {
            margin: 1.5rem 0 1.5rem 2rem;
        }
        li {
            margin-bottom: 0.8rem;
            color: #4a5568;
        }
        .article-image {
            width: 100%;
            height: auto;
            border-radius: var(--radius);
            margin: 2rem 0;
            box-shadow: var(--shadow);
            transition: transform 0.5s ease;
        }
        .article-image:hover {
            transform: scale(1.01);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: -1.5rem;
            margin-bottom: 2rem;
            font-size: 0.95rem;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: var(--shadow);
            border-radius: var(--radius);
            overflow: hidden;
        }
        .data-table th {
            background: var(--primary);
            color: white;
            padding: 1rem;
            text-align: left;
            font-weight: 600;
        }
        .data-table td {
            padding: 1rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .data-table tr:nth-child(even) {
            background: #f7fafc;
        }
        .data-table tr:hover {
            background: #edf2f7;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .widget {
            background: white;
            border-radius: var(--radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
        }
        .widget h3 {
            color: var(--primary);
            margin-top: 0;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid #e2e8f0;
        }
        .search-form {
            display: flex;
            margin-top: 1rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.8rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-form input:focus {
            outline: none;
            border-color: var(--secondary);
        }
        .search-form button {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            transition: var(--transition);
            font-weight: 600;
        }
        .search-form button:hover {
            background: #c53030;
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1rem 0;
            font-size: 1.8rem;
        }
        .star {
            color: #e2e8f0;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #f6ad55;
        }
        .rating-count {
            font-size: 0.9rem;
            color: var(--gray);
            margin-top: 0.5rem;
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 2px solid #e2e8f0;
            border-radius: var(--radius);
            margin: 1rem 0;
            font-family: inherit;
            font-size: 1rem;
            min-height: 120px;
            resize: vertical;
            transition: var(--transition);
        }
        .comment-form textarea:focus {
            outline: none;
            border-color: var(--secondary);
        }
        .comment-form button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: var(--radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            width: 100%;
        }
        .comment-form button:hover {
            background: #2c5282;
        }
        .related-links {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .related-links a {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            padding: 0.8rem;
            border-radius: var(--radius);
            transition: var(--transition);
            color: var(--dark);
            text-decoration: none;
            border: 1px solid transparent;
        }
        .related-links a:hover {
            background: #f0f9ff;
            border-color: #bee3f8;
            transform: translateX(5px);
        }
        .related-links i {
            color: var(--secondary);
        }
        .update-time {
            background: #e6fffa;
            padding: 1rem;
            border-radius: var(--radius);
            margin: 2rem 0;
            display: flex;
            align-items: center;
            gap: 1rem;
            border: 1px solid #81e6d9;
        }
        .update-time i {
            color: #38b2ac;
            font-size: 1.5rem;
        }
        footer {
            background: var(--primary);
            color: white;
            padding: 3rem 5% 2rem;
            margin-top: 3rem;
        }
        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .footer-links a {
            color: #cbd5e0;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.1);
            padding: 1.5rem;
            border-radius: var(--radius);
            margin: 1.5rem 0;
        }
        friend-link h3 {
            color: white;
            margin-bottom: 1rem;
        }
        .friend-link-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1rem;
        }
        .friend-link-grid a {
            display: block;
            padding: 0.8rem;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 4px;
            color: #cbd5e0;
            text-decoration: none;
            transition: var(--transition);
            text-align: center;
        }
        .friend-link-grid a:hover {
            background: rgba(255, 255, 255, 0.1);
            color: white;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #a0aec0;
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            .container {
                grid-template-columns: 1fr;
            }
            .sidebar {
                order: -1;
                display: grid;
                grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
                gap: 1.5rem;
            }
            h1 {
                font-size: 2.4rem;
            }
        }
        @media (max-width: 768px) {
            .top-bar {
                padding: 1rem;
            }
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .article-content {
                padding: 1.5rem;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .breadcrumb {
                padding: 0.8rem 1rem;
                font-size: 0.8rem;
            }
            .article-content {
                padding: 1rem;
            }
            .widget {
                padding: 1rem;
            }
            .friend-link-grid {
                grid-template-columns: 1fr;
            }
        }
        @media print {
            .header-container,
            .sidebar,
            footer,
            .search-form,
            .rating-widget,
            .comment-form {
                display: none;
            }
            .container {
                grid-template-columns: 1fr;
                margin: 0;
                padding: 0;
            }
            .article-content {
                box-shadow: none;
                padding: 0;
            }
            a {
                color: black;
                text-decoration: underline;
            }
        }