* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: #f8f9fa;
            padding-top: 80px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
            color: white;
            position: fixed;
            top: 0;
            width: 100%;
            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;
            padding: 15px 20px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #4ecdc4;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            font-size: 2rem;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            padding: 8px 0;
            position: relative;
            transition: color 0.3s;
        }
        .main-nav a:hover {
            color: #4ecdc4;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #4ecdc4;
            transition: width 0.3s;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background: #ecf0f1;
            padding: 12px 20px;
            font-size: 0.9rem;
            border-bottom: 1px solid #ddd;
        }
        .breadcrumb a {
            color: #3498db;
            text-decoration: none;
        }
        .breadcrumb span {
            color: #7f8c8d;
        }
        .search-box {
            background: white;
            padding: 40px 20px;
            margin: 20px auto;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            text-align: center;
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            gap: 10px;
        }
        .search-input {
            flex: 1;
            padding: 15px;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .search-input:focus {
            border-color: #3498db;
            outline: none;
        }
        .search-btn {
            background: #3498db;
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }
        .search-btn:hover {
            background: #2980b9;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin: 40px auto;
        }
        .article-content {
            background: white;
            padding: 40px;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.05);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }
        .sidebar-widget {
            background: white;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        h1 {
            font-size: 2.8rem;
            color: #2c3e50;
            margin-bottom: 25px;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: #3498db;
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #ecf0f1;
        }
        h3 {
            font-size: 1.5rem;
            color: #2c3e50;
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.2rem;
            color: #34495e;
            margin: 25px 0 10px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.05rem;
        }
        .lead {
            font-size: 1.2rem;
            color: #2c3e50;
            font-weight: 500;
            background: #f8f9fa;
            padding: 20px;
            border-left: 4px solid #3498db;
            border-radius: 5px;
            margin-bottom: 30px;
        }
        .highlight {
            background: linear-gradient(120deg, #a1c4fd 0%, #c2e9fb 100%);
            padding: 25px;
            border-radius: 10px;
            margin: 30px 0;
            border-left: 5px solid #3498db;
        }
        .article-img {
            width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 25px 0;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            transition: transform 0.3s;
        }
        .article-img:hover {
            transform: scale(1.01);
        }
        .content-link {
            color: #3498db;
            text-decoration: none;
            font-weight: 600;
            border-bottom: 1px dotted #3498db;
            transition: color 0.3s;
        }
        .content-link:hover {
            color: #e74c3c;
            border-bottom-style: solid;
        }
        .feature-list {
            list-style: none;
            margin: 25px 0;
        }
        .feature-list li {
            padding: 10px 0 10px 35px;
            position: relative;
        }
        .feature-list li:before {
            content: '✓';
            position: absolute;
            left: 0;
            color: #2ecc71;
            font-weight: bold;
            font-size: 1.2rem;
        }
        .rating-section, .comments-section {
            margin: 50px 0;
            padding: 30px;
            background: #f8f9fa;
            border-radius: 10px;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-top: 20px;
        }
        .star-rating {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #f1c40f;
            margin: 10px 0;
        }
        .star-rating i {
            cursor: pointer;
            transition: transform 0.2s;
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .form-control {
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-control:focus {
            border-color: #3498db;
            outline: none;
        }
        .submit-btn {
            background: #2ecc71;
            color: white;
            border: none;
            padding: 15px;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s;
            align-self: flex-start;
        }
        .submit-btn:hover {
            background: #27ae60;
        }
        .site-footer {
            background: #2c3e50;
            color: white;
            padding: 50px 0 20px;
            margin-top: 60px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h4 {
            color: #4ecdc4;
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #bdc3c7;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: #4ecdc4;
        }
        friend-link {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            padding: 8px 15px;
            border-radius: 5px;
            margin: 5px;
            color: #3498db;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #34495e;
            color: #95a5a6;
            font-size: 0.9rem;
        }
        .update-time {
            font-size: 0.9rem;
            color: #7f8c8d;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px dashed #ddd;
            text-align: right;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 2.4rem;
            }
            .main-nav ul {
                gap: 20px;
            }
        }
        @media (max-width: 768px) {
            body {
                padding-top: 70px;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: #2c3e50;
                padding: 20px;
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: all 0.3s;
                box-shadow: 0 5px 10px rgba(0,0,0,0.1);
            }
            .main-nav.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 15px;
            }
            .header-container {
                padding: 12px 20px;
            }
            .article-content {
                padding: 25px;
            }
            .search-form {
                flex-direction: column;
            }
            .search-btn {
                padding: 15px;
            }
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .sidebar-widget, .rating-section, .comments-section {
                padding: 20px;
            }
        }