fix(docs): update language-specific stage card links to use dynamic base

Standardize stage card links across language versions by using dynamic base path
Convert static div elements to anchor tags in Japanese and English versions

docs/en-us/index.md

@@ -34,31 +34,38 @@ features:
   </p>
 </div>
 
+<script setup>
+import { useData } from 'vitepress'
+
+const { site } = useData()
+const base = site.value.base
+</script>
+
 <div class="stage-container">
-  <div class="stage-card">
+  <a :href="base + 'en-us/stage-0/0.1-learning-map/'" class="stage-card">
     <div class="stage-icon">🌱</div>
     <h3>Stage 0: Getting Started</h3>
     <p>Suitable for product, operations, and non-technical backgrounds. Understand AI programming logic through games and build confidence.</p>
-    <a href="./stage-0/0.1-learning-map/">Learn More →</a>
-  </div>
-  <div class="stage-card">
+    <span>Learn More →</span>
+  </a>
+  <a :href="base + 'en-us/stage-1/1.1-introduction-to-ai-ide/'" class="stage-card">
     <div class="stage-icon">🎨</div>
     <h3>Stage 1: AI Product Manager</h3>
     <p>Master the Vibe Coding workflow. Learn to break down requirements and independently complete high-fidelity web application prototypes.</p>
-    <a href="./stage-1/1.1-introduction-to-ai-ide/">Learn More →</a>
-  </div>
-  <div class="stage-card">
+    <span>Learn More →</span>
+  </a>
+  <a :href="base + 'en-us/stage-2/frontend/2.0-lovart-assets/'" class="stage-card">
     <div class="stage-icon">💻</div>
     <h3>Stage 2: Full-Stack Development</h3>
     <p>Dive deep into full-stack development. Frontend componentization, database design, backend API development, and deployment.</p>
-    <a href="./stage-2/frontend/2.0-lovart-assets/">Learn More →</a>
-  </div>
-  <div class="stage-card">
+    <span>Learn More →</span>
+  </a>
+  <a :href="base + 'en-us/stage-3/core-skills/3.1-mcp-claudecode-skills/'" class="stage-card">
     <div class="stage-icon">🚀</div>
     <h3>Stage 3: Advanced Development</h3>
     <p>Build complex cross-platform applications. WeChat mini-program practical实战, challenge higher-level AI-native application development.</p>
-    <a href="./stage-3/core-skills/3.1-mcp-claudecode-skills/">Learn More →</a>
-  </div>
+    <span>Learn More →</span>
+  </a>
 </div>
 
 <style>