* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #1a365d;
            --secondary-color: #c53030;
            --accent-color: #ecc94b;
            --text-color: #2d3748;
            --light-bg: #f7fafc;
            --dark-bg: #2d3748;
            --border-color: #e2e8f0;
            --success-color: #38a169;
            --warning-color: #dd6b20;
            --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-heading: Georgia, 'Times New Roman', Times, serif;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: var(--font-main);
            line-height: 1.8;
            color: var(--text-color);
            background-color: var(--light-bg);
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            font-family: var(--font-heading);
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            border-bottom: 3px solid var(--accent-color);
            padding-bottom: 1rem;
            margin-top: 2rem;
        }
        h2 {
            font-size: 2.2rem;
            margin-top: 3rem;
            padding-left: 1rem;
            border-left: 5px solid var(--secondary-color);
        }
        h3 {
            font-size: 1.8rem;
            margin-top: 2.5rem;
            color: var(--dark-bg);
        }
        h4 {
            font-size: 1.5rem;
            margin-top: 2rem;
            color: #4a5568;
        }
        p {
            margin-bottom: 1.8rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary-color) 0%, #2c5282 100%);
            color: white;
            padding: 1.5rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 700;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            color: var(--accent-color);
        }
        .my-logo i {
            color: var(--secondary-color);
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: white;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 0.5rem;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 0.5rem;
            color: #718096;
        }
        .main-nav {
            display: flex;
            gap: 2.5rem;
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .main-nav a:hover,
        .main-nav a.active {
            background-color: rgba(255, 255, 255, 0.15);
            color: var(--accent-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .search-container {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            padding: 3rem 0;
            margin: 2rem 0;
            border-radius: 10px;
            text-align: center;
            color: white;
        }
        .search-box {
            max-width: 700px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .search-box h2 {
            color: white;
            border-left: none;
            padding-left: 0;
            margin-bottom: 1.5rem;
        }
        .search-form {
            display: flex;
            gap: 10px;
            margin-top: 1.5rem;
        }
        .search-form input {
            flex: 1;
            padding: 1rem 1.5rem;
            border: none;
            border-radius: 50px;
            font-size: 1.1rem;
            box-shadow: var(--shadow);
        }
        .search-form button {
            background-color: var(--accent-color);
            color: var(--primary-color);
            border: none;
            border-radius: 50px;
            padding: 0 2rem;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: white;
            transform: translateY(-2px);
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 3rem 0;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid var(--border-color);
            color: #718096;
            font-size: 0.95rem;
        }
        .update-time {
            color: var(--secondary-color);
            font-weight: 600;
        }
        .highlight-box {
            background: linear-gradient(135deg, #f6d365 0%, #fda085 100%);
            padding: 2rem;
            border-radius: 8px;
            margin: 2.5rem 0;
            border-left: 5px solid var(--secondary-color);
        }
        .highlight-box h3 {
            color: #7b341e;
            margin-top: 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat-card {
            background: white;
            padding: 1.8rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
            text-align: center;
            border-top: 4px solid var(--primary-color);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary-color);
            display: block;
            margin-bottom: 0.5rem;
        }
        .stat-label {
            color: #718096;
            font-size: 0.95rem;
        }
        .internal-links {
            background: var(--light-bg);
            padding: 2rem;
            border-radius: 8px;
            margin: 2.5rem 0;
        }
        .internal-links h3 {
            margin-top: 0;
        }
        .internal-links ul {
            list-style: none;
            columns: 2;
        }
        .internal-links li {
            margin-bottom: 0.8rem;
        }
        .internal-links a {
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .internal-links a:hover {
            color: var(--secondary-color);
            transform: translateX(5px);
        }
        .featured-image {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 2.5rem 0;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .featured-image:hover {
            transform: scale(1.01);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #718096;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .sidebar {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
            height: fit-content;
            position: sticky;
            top: 120px;
        }
        .sidebar-section {
            margin-bottom: 2.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        .sidebar-section:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }
        .sidebar-section h3 {
            font-size: 1.5rem;
            margin-top: 0;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .user-interaction {
            background: white;
            padding: 2.5rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
            margin: 3rem 0;
        }
        .rating-section,
        .comment-section {
            margin-bottom: 3rem;
        }
        .rating-section:last-child {
            margin-bottom: 0;
        }
        .rating-container {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .stars {
            display: flex;
            gap: 5px;
        }
        .star {
            color: #e2e8f0;
            font-size: 1.8rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #f6ad55;
        }
        .rating-form,
        .comment-form {
            display: grid;
            gap: 1.5rem;
            margin-top: 1.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-group label {
            font-weight: 600;
            color: var(--primary-color);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 1rem;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-family: var(--font-main);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.1);
        }
        .form-submit {
            background: linear-gradient(135deg, var(--primary-color) 0%, #2c5282 100%);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 6px;
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--transition);
            justify-self: start;
        }
        .form-submit:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }
        .comments-list {
            margin-top: 2rem;
        }
        .comment-item {
            background: var(--light-bg);
            padding: 1.5rem;
            border-radius: 8px;
            margin-bottom: 1.5rem;
            border-left: 4px solid var(--border-color);
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        .comment-author {
            font-weight: 700;
            color: var(--primary-color);
        }
        .comment-date {
            color: #718096;
            font-size: 0.9rem;
        }
        .comment-rating {
            color: #f6ad55;
            font-size: 0.9rem;
        }
        footer {
            background: var(--dark-bg);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h3 {
            color: var(--accent-color);
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
        }
        .footer-section ul {
            list-style: none;
        }
        .footer-section li {
            margin-bottom: 0.8rem;
        }
        .footer-section a {
            color: #cbd5e0;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-section a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.05);
            padding: 1rem;
            border-radius: 6px;
            margin-bottom: 0.8rem;
            border-left: 4px solid var(--accent-color);
        }
        friend-link a {
            color: var(--accent-color) !important;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #4a5568;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                gap: 1.5rem;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                text-align: center;
                margin-top: 1.5rem;
            }
            .main-nav.active {
                display: flex;
            }
            .hamburger {
                display: block;
                position: absolute;
                right: 20px;
                top: 20px;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .content-wrapper {
                gap: 2rem;
            }
            .article-content,
            .sidebar,
            .user-interaction {
                padding: 1.5rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form input,
            .search-form button {
                width: 100%;
                border-radius: 6px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .internal-links ul {
                columns: 1;
            }
        }
        @media print {
            header, .sidebar, .search-container, .user-interaction, footer {
                display: none;
            }
            .article-content {
                box-shadow: none;
                padding: 0;
            }
            body {
                background: white;
                color: black;
            }
        }