body {
            font-family: 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            margin: 0;
            padding: 0;
            color: #333;
            background-color: #f5f5f5;
        }
        header {
            background-color: #2c3e50;
            color: white;
            padding: 2rem 0;
            text-align: center;
        }
        nav {
            background-color: #34495e;
            padding: 1rem;
        }
        nav ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            justify-content: center;
        }
        nav li {
            margin: 0 1rem;
        }
        nav a {
            color: white;
            text-decoration: none;
            font-weight: bold;
        }
        main {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 1rem;
        }
        .article-card {
            background: white;
            border-radius: 5px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            margin-bottom: 2rem;
            padding: 1.5rem;
        }
        .article-card h2 {
            color: #2c3e50;
            margin-top: 0;
        }
        .article-meta {
            color: #7f8c8d;
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }
        footer {
            background-color: #2c3e50;
            color: white;
            text-align: center;
            padding: 1.5rem;
            margin-top: 2rem;
        }