主页重构

src/content/docs/en/guides/example.md

@@ -1,11 +1,24 @@
 ---
-title: Example Guide
-description: A guide in my new Starlight docs site.
+title: Welcome to the knowledge base
+description: A starting point for reading and contributing to ΣDOCS.
+sidebar:
+  order: 0
 ---
 
-Guides lead a user through a specific task they want to accomplish, often with a sequence of steps.
-Writing a good guide requires thinking about what your users are trying to do.
+ΣDOCS collects engineering notes and competition guides from Simba Robotics at Heilongjiang University.
 
-## Further reading
+:::note[Documentation language]
+The technical guides and 2026 campus competition rules are currently written in Chinese. Untranslated pages use Starlight’s Chinese fallback. New sample articles are marked at the top of each page.
+:::
 
-- Read [about how-to guides](https://diataxis.fr/how-to-guides/) in the Diátaxis framework
+## Choose an entry point
+
+- [Getting started (Chinese)](/zh-cn/guides/getting-started/)
+- [2026 campus competition guide (Chinese)](/zh-cn/competition/)
+- [Mechanical engineering (Chinese)](/zh-cn/mest/getting-started/)
+- [Electronics and control (Chinese)](/zh-cn/elct/getting-started/)
+- [Vision and algorithms (Chinese)](/zh-cn/vsag/intro/)
+- [Operations and media (Chinese)](/zh-cn/pram/getting-started/)
+- [Contributing guide (Chinese)](/zh-cn/guides/contributing/)
+
+The campus competition guide is a **preview based on the supplied draft**, with unresolved items listed separately for the organizers to confirm.