* {
            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;
        }
        a {
            color: #0066cc;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #004999;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 700; }
        .italic { font-style: italic; }
        .highlight {
            background-color: #fffacd;
            padding: 2px 4px;
            border-radius: 3px;
        }
        .site-header {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            color: #fff;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Arial Black', Gadget, sans-serif;
            font-size: 2.2rem;
            color: #00a8ff;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            color: #4dc3ff;
            text-decoration: none;
        }
        .my-logo i {
            font-size: 2rem;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .main-nav a {
            color: #e6e6e6;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0.2rem;
            position: relative;
        }
        .main-nav a:hover {
            color: #00a8ff;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: #00a8ff;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.8rem 20px;
            font-size: 0.9rem;
            border-bottom: 1px solid #dee2e6;
        }
        .breadcrumb a {
            color: #495057;
        }
        .breadcrumb span {
            color: #6c757d;
        }
        .hero {
            background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1580273916550-e323be2ae537?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') no-repeat center center/cover;
            color: white;
            padding: 4rem 20px;
            margin-bottom: 2.5rem;
            border-radius: 0 0 10px 10px;
        }
        .hero h1 {
            font-size: 3.2rem;
            margin-bottom: 1.2rem;
            line-height: 1.2;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 1.5rem;
            opacity: 0.95;
        }
        .search-bar {
            max-width: 600px;
            margin: 2rem auto;
            background: rgba(255,255,255,0.95);
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 8px 25px rgba(0,0,0,0.2);
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex-grow: 1;
            padding: 15px;
            border: 2px solid #00a8ff;
            border-radius: 8px 0 0 8px;
            font-size: 1.1rem;
            outline: none;
        }
        .search-form button {
            background-color: #00a8ff;
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: background-color 0.3s;
        }
        .search-form button:hover {
            background-color: #0088cc;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2rem 0;
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        h1, h2, h3, h4 {
            color: #1a1a2e;
            margin-top: 2rem;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 { font-size: 2.8rem; }
        h2 {
            font-size: 2.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #00a8ff;
            margin-top: 3rem;
        }
        h3 { font-size: 1.8rem; color: #2d3436; }
        h4 { font-size: 1.5rem; color: #4a4a4a; }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: #444;
            background-color: #f1f8ff;
            padding: 1.5rem;
            border-left: 5px solid #00a8ff;
            border-radius: 0 8px 8px 0;
            margin: 2rem 0;
        }
        .info-box {
            background-color: #f8f9fa;
            border-left: 4px solid #17a2b8;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2.5rem 0;
            box-shadow: 0 4px 8px rgba(0,0,0,0.05);
            border-radius: 8px;
            overflow: hidden;
        }
        .comparison-table th, .comparison-table td {
            padding: 1.2rem 1rem;
            text-align: left;
            border-bottom: 1px solid #dee2e6;
        }
        .comparison-table th {
            background-color: #1a1a2e;
            color: white;
            font-weight: 700;
        }
        .comparison-table tr:nth-child(even) {
            background-color: #f8f9fa;
        }
        .comparison-table tr:hover {
            background-color: #e9ecef;
        }
        .feature-img {
            margin: 2.5rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            max-width: 900px;
        }
        .caption {
            font-size: 0.95rem;
            color: #666;
            text-align: center;
            padding: 0.8rem;
            background-color: #f8f9fa;
            font-style: italic;
        }
        .related-links {
            background-color: #e9f7fe;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2.5rem 0;
        }
        .related-links h3 {
            margin-top: 0;
            color: #0066cc;
        }
        .related-links ul {
            list-style-type: none;
            padding-left: 0;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
        }
        .related-links li {
            margin-bottom: 0.5rem;
        }
        .related-links a {
            display: block;
            padding: 0.8rem;
            background-color: white;
            border-radius: 5px;
            border: 1px solid #b3e0ff;
            transition: all 0.3s;
        }
        .related-links a:hover {
            background-color: #0066cc;
            color: white;
            border-color: #0066cc;
            text-decoration: none;
            transform: translateY(-3px);
            box-shadow: 0 5px 10px rgba(0,102,204,0.2);
        }
        .sidebar {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: 2.5rem;
        }
        .sidebar-widget h3 {
            font-size: 1.5rem;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #00a8ff;
        }
        .update-time {
            background-color: #fff3cd;
            border: 1px solid #ffeaa7;
            color: #856404;
            padding: 1rem;
            border-radius: 8px;
            font-size: 0.95rem;
            text-align: center;
        }
        .update-time i {
            margin-right: 8px;
        }
        .user-interaction {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            margin-top: 2.5rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .rating-widget, .comment-form {
            margin-bottom: 3rem;
        }
        .stars {
            display: flex;
            gap: 10px;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ffc107;
        }
        .interaction-form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #444;
        }
        .form-group input,
        .form-group textarea {
            padding: 12px 15px;
            border: 1px solid #ced4da;
            border-radius: 8px;
            font-size: 1rem;
            font-family: inherit;
            transition: border-color 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #00a8ff;
            box-shadow: 0 0 0 3px rgba(0,168,255,0.2);
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            background-color: #00a8ff;
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.3s, transform 0.2s;
            align-self: flex-start;
        }
        .submit-btn:hover {
            background-color: #0088cc;
            transform: translateY(-2px);
        }
        .site-footer {
            background-color: #1a1a2e;
            color: #e6e6e6;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-widget h3 {
            color: #00a8ff;
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #2d3436;
        }
        friend-link {
            display: block;
            margin-bottom: 0.8rem;
        }
        friend-link a {
            color: #b3e0ff;
        }
        friend-link a:hover {
            color: #4dc3ff;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2d3436;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            .hero h1 {
                font-size: 2.6rem;
            }
            h2 { font-size: 2rem; }
            h3 { font-size: 1.6rem; }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: #1a1a2e;
                padding: 1rem 0;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            .main-nav.active ul {
                display: flex;
            }
            .main-nav li {
                text-align: center;
                padding: 0.7rem 0;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
            .article-content {
                padding: 1.8rem;
            }
            .related-links ul {
                grid-template-columns: 1fr;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form input {
                border-radius: 8px;
                margin-bottom: 10px;
            }
            .search-form button {
                border-radius: 8px;
                padding: 15px;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.9rem;
            }
            h2 { font-size: 1.7rem; }
            h3 { font-size: 1.4rem; }
            .my-logo {
                font-size: 1.8rem;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.8s ease-out forwards;
        }