.. toctree::
   :maxdepth: 3
   :caption: 产品编码 文档的项目名称

   README.md
   docs/产品介绍
   docs/产品安装
   docs/驱动安装
   docs/Arduino/Arduino
   docs/KidsBlock/KidsBlock
   docs/Mixly/Mixly
   docs/问题解答