/* 简单的样式，让页面看起来更清晰 */
        body { font-family: Arial, sans-serif; line-height: 1.6; margin: 20px; color: #000000; }
        h1, h2, h3 { color: #333; }
        a { text-decoration: none; }
        a:hover { text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; margin-left: auto; margin-right: auto; padding: 10px 0; }
        .toc { margin-bottom: 30px; padding: 15px; border: 1px solid #eee; background-color: #f9f9f9; }
        .toc ol { padding-left: 20px; }
        .toc li span a { color: #000000; } /* 保持原有颜色 */