* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        :root {
            --primary-color: #0057b8; 
            --secondary-color: #c41200; 
            --accent-color: #f0ad4e; 
            --dark-color: #1a1a1a;
            --light-color: #f8f9fa;
            --gray-color: #6c757d;
            --border-radius: 8px;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
        .site-header {
            background-color: #fff;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 900;
            text-decoration: none;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: var(--secondary-color); }
        .my-logo:hover { color: var(--secondary-color); }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .main-nav a {
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 600;
            padding: 5px 0;
            position: relative;
            transition: var(--transition);
        }
        .main-nav a:hover, .main-nav a.active {
            color: var(--primary-color);
        }
        .main-nav a:hover::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--primary-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--dark-color);
            cursor: pointer;
            padding: 5px;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb .container {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }
        .breadcrumb a {
            text-decoration: none;
            color: var(--gray-color);
        }
        .breadcrumb a:hover { color: var(--primary-color); }
        .breadcrumb .separator { color: var(--gray-color); }
        .search-section {
            background: linear-gradient(135deg, var(--primary-color), #003d82);
            padding: 30px 0;
            color: white;
            text-align: center;
        }
        .search-section h2 { margin-bottom: 20px; font-size: 1.8rem; }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .search-form input {
            flex-grow: 1;
            padding: 18px 25px;
            border: none;
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0 30px;
            cursor: pointer;
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .search-form button:hover { background-color: #a30d00; }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
        }
        article {
            background-color: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-header { margin-bottom: 40px; }
        .article-header h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            color: var(--dark-color);
            margin-bottom: 15px;
        }
        .meta-info {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            color: var(--gray-color);
            font-size: 0.95rem;
            padding-bottom: 20px;
            border-bottom: 1px solid #dee2e6;
        }
        .update-time { color: var(--secondary-color); font-weight: 600; }
        h2 { font-size: 2rem; color: var(--primary-color); margin: 50px 0 20px; padding-bottom: 10px; border-bottom: 2px solid #eaeaea; }
        h3 { font-size: 1.6rem; color: var(--dark-color); margin: 35px 0 15px; }
        h4 { font-size: 1.3rem; color: var(--gray-color); margin: 25px 0 10px; }
        p { margin-bottom: 22px; font-size: 1.1rem; text-align: justify; }
        .lead { font-size: 1.3rem; color: var(--dark-color); font-weight: 500; margin-bottom: 30px; line-height: 1.6; }
        strong { color: var(--dark-color); font-weight: 700; }
        em { font-style: italic; }
        a.content-link {
            color: var(--primary-color);
            text-decoration: underline;
            font-weight: 600;
            transition: var(--transition);
        }
        a.content-link:hover {
            color: var(--secondary-color);
            text-decoration: none;
        }
        .highlight-box {
            background: linear-gradient(to right, #f8f9fa, #e9ecef);
            border-left: 5px solid var(--accent-color);
            padding: 25px;
            margin: 30px 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .figure-container {
            margin: 40px 0;
            text-align: center;
        }
        .figure-container img {
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin: 0 auto 15px;
        }
        .figcaption {
            font-style: italic;
            color: var(--gray-color);
            font-size: 0.95rem;
            padding: 0 10px;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .stat-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 25px;
            text-align: center;
            box-shadow: var(--shadow);
            border-top: 4px solid var(--primary-color);
        }
        .stat-card i { font-size: 2.5rem; color: var(--primary-color); margin-bottom: 15px; }
        .stat-card h4 { margin-top: 0; color: var(--primary-color); }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .widget {
            background: white;
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .widget h3 {
            font-size: 1.4rem;
            margin-top: 0;
            padding-bottom: 15px;
            border-bottom: 1px solid #dee2e6;
            color: var(--primary-color);
        }
        .link-list { list-style: none; }
        .link-list li { margin-bottom: 12px; }
        .link-list a {
            text-decoration: none;
            color: var(--dark-color);
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px;
            border-radius: 4px;
            transition: var(--transition);
        }
        .link-list a:hover {
            background-color: #f0f7ff;
            color: var(--primary-color);
            padding-left: 15px;
        }
        .link-list i { color: var(--gray-color); }
        .interactive-section {
            background: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin-top: 40px;
        }
        .interactive-section h2 { margin-top: 0; }
        .rating-widget {
            display: flex;
            align-items: center;
            gap: 15px;
            margin: 25px 0;
            flex-wrap: wrap;
        }
        .stars {
            display: flex;
            gap: 5px;
        }
        .star {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover, .star.active { color: var(--accent-color); }
        .rating-form, .comment-form {
            display: grid;
            gap: 20px;
            margin-top: 30px;
        }
        .form-group { display: flex; flex-direction: column; }
        .form-group label { margin-bottom: 8px; font-weight: 600; }
        .form-group input, .form-group textarea, .form-group select {
            padding: 15px;
            border: 1px solid #ced4da;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus, .form-group textarea:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(0, 87, 184, 0.1);
        }
        .submit-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 16px 30px;
            border-radius: var(--border-radius);
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            justify-self: start;
        }
        .submit-btn:hover { background-color: #0047a3; }
        .site-footer {
            background-color: var(--dark-color);
            color: #adb5bd;
            padding: 50px 0 30px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-widget h4 {
            color: white;
            margin-bottom: 25px;
            font-size: 1.3rem;
        }
        friend-link {
            display: block;
            margin-bottom: 10px;
        }
        friend-link a {
            color: #adb5bd;
            text-decoration: none;
            transition: var(--transition);
        }
        friend-link a:hover { color: white; padding-left: 5px; }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #495057;
            font-size: 0.9rem;
            color: #6c757d;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav { display: none; width: 100%; }
            .main-nav.active { display: block; margin-top: 20px; }
            .main-nav ul { flex-direction: column; gap: 0; }
            .main-nav li { border-bottom: 1px solid #eee; }
            .main-nav a { display: block; padding: 15px; }
            .main-nav a:hover::after { display: none; }
            .header-inner { flex-wrap: wrap; }
            .article-header h1 { font-size: 2.2rem; }
            article, .interactive-section { padding: 25px; }
            .search-form { flex-direction: column; border-radius: var(--border-radius); }
            .search-form input, .search-form button { border-radius: 0; padding: 18px; }
            .main-content { gap: 30px; }
            .stats-grid { grid-template-columns: 1fr; }
        }