可以支持 页内 目录吗？ 根据 各级标题，在文章页面 部分生成一个简易的目录，方便对文章整体的把握

[MARGI3]

Please make sure these boxes are checked before submitting your issue. Thank you!

• [ ] I have setuped and configurated the blog according to Hexo official documentation;
• [ ] I have read the Theme Wiki carefully and created my own configuration file(_config.yml);
• [ ] I have looked up the Issues and found no duplicate issues.

请在发布新Issue之前确保你已经进行了如下工作，谢谢！

• [ ] 我已经按照Hexo官方文档中的步骤安装与配置了Hexo；
• [ ] 我已经仔细地阅读了主题Wiki并创建了自己的配置文件(_config.yml)；
• [ ] 我已经搜索了Issues，并且没有找到类似的问题。

[ppoffice]

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