/* 添加CSS样式以更好地结构化和设计 */
            .container {
                max-width: 1200px;
                margin: 0 auto;
                padding: 20px;
                font-family: Arial, sans-serif;
            }
            .directory {
                background-color: #f5f5f5;
                padding: 10px;
                margin-bottom: 20px;
                border-radius: 8px;
            }
            .directory h3 {
                margin: 0;
                padding-bottom: 10px;
            }
            .directory ul {
                list-style-type: none;
                padding: 0;
            }
            .directory ul li {
                margin-bottom: 5px;
            }
            .directory ul li a {
                text-decoration: none;
                color: #0066cc;
            }
            .content-section {
                margin-bottom: 40px;
            }
            .content-section h2 {
                color: #333;
            }
            .recommendations {
                background-color: #e9f7f7;
                padding: 20px;
                border-radius: 8px;
            }
            .recommendations h3 {
                margin-bottom: 10px;
            }
            .recommendations ul {
                list-style-type: none;
                padding: 0;
            }
            .recommendations ul li {
                margin-bottom: 10px;
            }
            .recommendations ul li a {
                text-decoration: none;
                color: #0066cc;
            }