* {
            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: #2a5db0;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #1d3f7a;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #1a2b4c 0%, #2c3e50 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-size: 1.8rem;
            font-weight: 800;
            color: #4fc3f7;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            color: #29b6f6;
            text-decoration: none;
        }
        .my-logo i {
            font-size: 2rem;
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            color: #ecf0f1;
            font-weight: 500;
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
        }
        .nav-desktop a:hover {
            color: #4fc3f7;
            border-bottom-color: #4fc3f7;
            text-decoration: none;
        }
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        @media (max-width: 768px) {
            .hamburger-btn {
                display: block;
            }
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background-color: #2c3e50;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            padding: 1rem;
            box-shadow: 0 5px 10px rgba(0,0,0,0.2);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: #ecf0f1;
            padding: 0.8rem;
            border-bottom: 1px solid #34495e;
        }
        .nav-mobile a:hover {
            background-color: #34495e;
            text-decoration: none;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb a {
            color: #555;
        }
        .breadcrumb span {
            color: #777;
        }
        .breadcrumb i {
            margin: 0 8px;
            color: #999;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-area {
            background-color: #fff;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar {
            background-color: #fff;
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a2b4c;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #4fc3f7;
            padding-bottom: 0.5rem;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
        }
        h2 {
            font-size: 2rem;
            color: #2c3e50;
            margin: 2.5rem 0 1rem;
            padding-left: 10px;
            border-left: 5px solid #3498db;
        }
        h3 {
            font-size: 1.5rem;
            color: #34495e;
            margin: 2rem 0 0.8rem;
        }
        h4 {
            font-size: 1.2rem;
            color: #5d6d7e;
            margin: 1.5rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            color: #555;
            font-weight: 500;
            margin-bottom: 2rem;
            padding: 1rem;
            background-color: #f1f8ff;
            border-radius: 8px;
            border-left: 4px solid #3498db;
        }
        .highlight {
            background-color: #fffde7;
            padding: 1.5rem;
            border-radius: 8px;
            border: 1px dashed #fbc02d;
            margin: 1.5rem 0;
        }
        .highlight strong {
            color: #e65100;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .text-muted {
            color: #777;
            font-size: 0.95rem;
        }
        .search-box, .comment-form, .rating-form {
            background-color: #f8f9fa;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
            border: 1px solid #dee2e6;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #444;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        button, .btn {
            background-color: #3498db;
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: background-color 0.3s, transform 0.2s;
            display: inline-block;
            text-align: center;
        }
        button:hover, .btn:hover {
            background-color: #2980b9;
            transform: translateY(-2px);
            text-decoration: none;
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            margin: 10px 0;
        }
        .rating-stars .star {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating-stars .star:hover,
        .rating-stars .star.active {
            color: #f39c12;
        }
        .article-img {
            width: 100%;
            border-radius: 10px;
            margin: 2rem auto;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            transition: transform 0.5s ease;
        }
        .article-img:hover {
            transform: scale(1.01);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.9rem;
        }
        .internal-links {
            background-color: #e3f2fd;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
        }
        .internal-links h3 {
            margin-top: 0;
            color: #1565c0;
        }
        .internal-links ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 10px;
        }
        .internal-links li {
            padding: 0.5rem 0;
        }
        .internal-links a {
            color: #0d47a1;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .internal-links a:hover {
            color: #1a237e;
            text-decoration: underline;
        }
        .sidebar-widget {
            margin-bottom: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid #eee;
        }
        .sidebar-widget:last-child {
            border-bottom: none;
        }
        .sidebar-widget h4 {
            color: #2c3e50;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #4fc3f7;
        }
        .update-time {
            font-size: 0.9rem;
            color: #27ae60;
            font-weight: bold;
            background-color: #eafaf1;
            padding: 0.5rem;
            border-radius: 5px;
            display: inline-block;
        }
        .site-footer {
            background-color: #1a2b4c;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: #4fc3f7;
            margin-bottom: 1.2rem;
            font-size: 1.2rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.7rem;
        }
        .footer-links a {
            color: #bdc3c7;
        }
        .footer-links a:hover {
            color: #4fc3f7;
            padding-left: 5px;
            transition: all 0.3s;
        }
        friend-link {
            display: block;
            background-color: #2c3e50;
            padding: 1rem;
            border-radius: 8px;
            margin: 1rem 0;
        }
        friend-link a {
            color: #3498db;
            font-weight: bold;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2c3e50;
            color: #95a5a6;
            font-size: 0.9rem;
        }
        .text-center {
            text-align: center;
        }
        .mt-3 { margin-top: 1rem; }
        .mb-3 { margin-bottom: 1rem; }
        .py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }