diff --git a/docs/.vitepress/config.mjs b/docs/.vitepress/config.mjs
index 5540f3b..7b9cc6a 100644
--- a/docs/.vitepress/config.mjs
+++ b/docs/.vitepress/config.mjs
@@ -1528,35 +1528,35 @@ Sitemap: ${siteUrl}/sitemap.xml
                   link: '/zh-cn/stage-2/frontend/2.5-hogwarts-portraits/'
                 },
                 {
-                  text: '大作业 1：AI 营销文案 SaaS 开发实战',
+                  text: 'AI 营销文案 SaaS 开发实战',
                   link: '/zh-cn/stage-2/assignments/copywriting-platform-supabase/'
                 },
                 {
-                  text: '大作业 2：在线考试与管理系统开发实战',
+                  text: '在线考试与管理系统开发实战',
                   link: '/zh-cn/stage-2/assignments/exam-management-express/'
                 },
                 {
-                  text: '扩展作业：现代 AI 生图 SaaS 开发实战',
+                  text: '现代 AI 生图 SaaS 开发实战',
                   link: '/zh-cn/stage-2/assignments/modern-landing-page/'
                 },
                 {
-                  text: '扩展作业：类 Dify 智能体平台开发实战',
+                  text: '类 Dify 智能体平台开发实战',
                   link: '/zh-cn/stage-2/assignments/custom-dify-agent-platform/'
                 },
                 {
-                  text: '扩展作业：智能旅游规划 Agent 平台开发实战',
+                  text: '智能旅游规划 Agent 平台开发实战',
                   link: '/zh-cn/stage-2/assignments/travel-planning-agent-platform/'
                 },
                 {
-                  text: '扩展作业：Spring Boot 电影推荐系统开发实战',
+                  text: 'Spring Boot 电影推荐系统开发实战',
                   link: '/zh-cn/stage-2/assignments/movie-recommendation-springboot/'
                 },
                 {
-                  text: '扩展作业：生鲜电商微服务系统开发实战',
+                  text: '生鲜电商微服务系统开发实战',
                   link: '/zh-cn/stage-2/assignments/simple-grocery-microservices/'
                 },
                 {
-                  text: '扩展作业：Go 交通数据分析平台开发实战',
+                  text: 'Go 交通数据分析平台开发实战',
                   link: '/zh-cn/stage-2/assignments/traffic-data-visualization-go/'
                 }
               ]
diff --git a/docs/public/sitemap.xml b/docs/public/sitemap.xml
index ed1f46a..7477181 100644
--- a/docs/public/sitemap.xml
+++ b/docs/public/sitemap.xml
@@ -940,112 +940,112 @@
   </url>
   <url>
     <loc>https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/copywriting-platform-supabase/PRD/</loc>
-    <lastmod>2026-03-31T04:14:27.746Z</lastmod>
+    <lastmod>2026-03-31T12:29:51+08:00</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.8</priority>
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     <loc>https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/copywriting-platform-supabase/</loc>
-    <lastmod>2026-03-29T19:37:03+08:00</lastmod>
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     <priority>0.8</priority>
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   </url>
   <url>
     <loc>https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/custom-dify-agent-platform/PRD/</loc>
-    <lastmod>2026-03-31T04:14:27.747Z</lastmod>
+    <lastmod>2026-03-31T12:29:51+08:00</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.8</priority>
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   <url>
     <loc>https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/custom-dify-agent-platform/</loc>
-    <lastmod>2026-03-29T19:37:03+08:00</lastmod>
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     <priority>0.8</priority>
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   </url>
   <url>
     <loc>https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/exam-management-express/PRD/</loc>
-    <lastmod>2026-03-31T04:14:27.748Z</lastmod>
+    <lastmod>2026-03-31T12:29:51+08:00</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.8</priority>
     <xhtml:link rel="alternate" hreflang="zh-CN" href="https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/exam-management-express/PRD/"/>
   </url>
   <url>
     <loc>https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/exam-management-express/</loc>
-    <lastmod>2026-03-29T19:37:03+08:00</lastmod>
+    <lastmod>2026-03-31T12:29:51+08:00</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.8</priority>
     <xhtml:link rel="alternate" hreflang="zh-CN" href="https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/exam-management-express/"/>
   </url>
   <url>
     <loc>https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/modern-landing-page/PRD/</loc>
-    <lastmod>2026-03-30T09:59:56.848Z</lastmod>
+    <lastmod>2026-03-31T12:29:51+08:00</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.8</priority>
     <xhtml:link rel="alternate" hreflang="zh-CN" href="https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/modern-landing-page/PRD/"/>
   </url>
   <url>
     <loc>https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/modern-landing-page/</loc>
-    <lastmod>2026-03-29T19:37:03+08:00</lastmod>
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   </url>
   <url>
     <loc>https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/movie-recommendation-springboot/PRD/</loc>
-    <lastmod>2026-03-31T04:15:20.951Z</lastmod>
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     <priority>0.8</priority>
     <xhtml:link rel="alternate" hreflang="zh-CN" href="https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/movie-recommendation-springboot/PRD/"/>
   </url>
   <url>
     <loc>https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/movie-recommendation-springboot/</loc>
-    <lastmod>2026-03-29T19:37:03+08:00</lastmod>
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   </url>
   <url>
     <loc>https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/simple-grocery-microservices/PRD/</loc>
-    <lastmod>2026-03-31T04:15:20.951Z</lastmod>
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   </url>
   <url>
     <loc>https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/simple-grocery-microservices/</loc>
-    <lastmod>2026-03-29T19:37:03+08:00</lastmod>
+    <lastmod>2026-03-31T12:29:51+08:00</lastmod>
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     <xhtml:link rel="alternate" hreflang="zh-CN" href="https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/simple-grocery-microservices/"/>
   </url>
   <url>
     <loc>https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/traffic-data-visualization-go/PRD/</loc>
-    <lastmod>2026-03-31T04:15:20.951Z</lastmod>
+    <lastmod>2026-03-31T12:29:51+08:00</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.8</priority>
     <xhtml:link rel="alternate" hreflang="zh-CN" href="https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/traffic-data-visualization-go/PRD/"/>
   </url>
   <url>
     <loc>https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/traffic-data-visualization-go/</loc>
-    <lastmod>2026-03-29T19:37:03+08:00</lastmod>
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   </url>
   <url>
     <loc>https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/travel-planning-agent-platform/PRD/</loc>
-    <lastmod>2026-03-31T04:15:20.950Z</lastmod>
+    <lastmod>2026-03-31T12:29:51+08:00</lastmod>
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   </url>
   <url>
     <loc>https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/assignments/travel-planning-agent-platform/</loc>
-    <lastmod>2026-03-29T19:37:03+08:00</lastmod>
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@@ -1164,7 +1164,7 @@
   </url>
   <url>
     <loc>https://datawhalechina.github.io/easy-vibe/zh-cn/stage-2/</loc>
-    <lastmod>2026-03-29T19:37:03+08:00</lastmod>
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