diff --git a/docs/source.zh-CN/index.rst b/docs/source.zh-CN/index.rst
index 39a3946..3a4d91d 100644
--- a/docs/source.zh-CN/index.rst
+++ b/docs/source.zh-CN/index.rst
@@ -159,10 +159,20 @@ JSON 动作列表就是上述 list 的 list。
 
 .. toctree::
    :maxdepth: 2
-   :caption: 文档
+   :caption: 架构
 
    architecture
+
+.. toctree::
+   :maxdepth: 3
+   :caption: 使用指南
+
    usage/index
+
+.. toctree::
+   :maxdepth: 2
+   :caption: API 参考
+
    api/index
 
 索引
diff --git a/docs/source.zh-TW/index.rst b/docs/source.zh-TW/index.rst
index 6bc4858..0680ac7 100644
--- a/docs/source.zh-TW/index.rst
+++ b/docs/source.zh-TW/index.rst
@@ -159,10 +159,20 @@ JSON 動作清單就是上述 list 的 list。
 
 .. toctree::
    :maxdepth: 2
-   :caption: 文件
+   :caption: 架構
 
    architecture
+
+.. toctree::
+   :maxdepth: 3
+   :caption: 使用指南
+
    usage/index
+
+.. toctree::
+   :maxdepth: 2
+   :caption: API 參考
+
    api/index
 
 索引
diff --git a/docs/source/index.rst b/docs/source/index.rst
index c441d14..16406ac 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -162,10 +162,20 @@ A JSON action list is simply a list of these lists.
 
 .. toctree::
    :maxdepth: 2
-   :caption: Documentation
+   :caption: Architecture
 
    architecture
+
+.. toctree::
+   :maxdepth: 3
+   :caption: Usage guide
+
    usage/index
+
+.. toctree::
+   :maxdepth: 2
+   :caption: API reference
+
    api/index
 
 Indices