主页修改，部分内容填充测试

src/content/docs/zh-cn/index.mdx

@@ -0,0 +1,42 @@
+---
+title: 欢迎使用 Σ 文档
+description: 本文档是一份开放贡献的 RoboMaster 系列赛事相关知识教程库。
+template: splash # Remove or comment out this line to display the site sidebar on this page.
+hero:
+  tagline: 基于 Astro / Starlight 搭建，少女施工中...
+  image:
+    file: ../../../assets/houston.webp
+  actions:
+    - text: 阅读概览
+      link: /zh-cn/intro
+      icon: right-arrow
+    - text: 提交修改
+      link: https://git.simba-robotics.com/PRAM/simba_docs
+    - text: 访问 Simba 官网
+      link: https://simba-robotics.com
+      icon: external
+      variant: minimal
+---
+
+import { Card, CardGrid } from '@astrojs/starlight/components';
+
+## Next steps
+
+<CardGrid stagger>
+	<Card title="Update content" icon="pencil">
+		Edit `src/content/docs/index.mdx` to see this page change.
+	</Card>
+	<Card title="Change page layout" icon="document">
+		Delete `template: splash` in `src/content/docs/index.mdx` to display a
+		sidebar on this page.
+	</Card>
+	<Card title="Add new content" icon="add-document">
+		Add Markdown or MDX files to `src/content/docs` to create new pages.
+	</Card>
+	<Card title="Configure your site" icon="setting">
+		Edit your `sidebar` and other config in `astro.config.mjs`.
+	</Card>
+	<Card title="Read the docs" icon="open-book">
+		Learn more in [the Starlight Docs](https://starlight.astro.build/).
+	</Card>
+</CardGrid>