diff --git a/docs/.vitepress/config.mts b/docs/.vitepress/config.mts
index dc1a8726..b27b9445 100644
--- a/docs/.vitepress/config.mts
+++ b/docs/.vitepress/config.mts
@@ -1,5 +1,26 @@
 import { defineConfig } from 'vitepress'
 
+const localSearch = {
+  provider: 'local' as const,
+  options: {
+    translations: {
+      button: {
+        buttonText: '搜索',
+        buttonAriaLabel: '搜索文档'
+      },
+      modal: {
+        noResultsText: '无法找到相关结果',
+        resetButtonTitle: '清除查询条件',
+        footer: {
+          selectText: '选择',
+          navigateText: '切换',
+          closeText: '关闭'
+        }
+      }
+    }
+  }
+}
+
 function safeGenericEscapePlugin() {
   return {
     name: 'safe-generic-escape',
@@ -62,6 +83,10 @@ export default defineConfig({
       chunkSizeWarningLimit: 1000
     }
   },
+  themeConfig: {
+    // 在顶层保留搜索配置，避免构建期只读取站点级配置时把搜索入口裁掉。
+    search: localSearch
+  },
   /** 多语言 */
   locales: {
     root: {
@@ -71,41 +96,21 @@ export default defineConfig({
 
       themeConfig: {
         logo: '/logo-icon.png',
-
-        search: {
-          provider: 'local',
-          options: {
-            translations: {
-              button: {
-                buttonText: '搜索文档',
-                buttonAriaLabel: '搜索文档'
-              },
-              modal: {
-                noResultsText: '无法找到相关结果',
-                resetButtonTitle: '清除查询条件',
-                footer: {
-                  selectText: '选择',
-                  navigateText: '切换',
-                  closeText: '关闭'
-                }
-              }
-            }
-          }
-        },
+        search: localSearch,
 
         nav: [
           { text: '首页', link: '/zh-CN/' },
           { text: '入门指南', link: '/zh-CN/getting-started' },
           { text: 'Core', link: '/zh-CN/core/' },
-          { text: 'ECS', link: '/zh-CN/ecs/' },
           { text: 'Game', link: '/zh-CN/game/' },
           { text: 'Godot', link: '/zh-CN/godot/' },
-          { text: '源码生成器', link: '/zh-CN/source-generators' },
           { text: '教程', link: '/zh-CN/tutorials/' },
-          { text: '最佳实践', link: '/zh-CN/best-practices/' },
           {
             text: '更多',
             items: [
+              { text: 'ECS', link: '/zh-CN/ecs/' },
+              { text: '源码生成器', link: '/zh-CN/source-generators' },
+              { text: '最佳实践', link: '/zh-CN/best-practices/' },
               { text: 'API 参考', link: '/zh-CN/api-reference' },
               { text: '常见问题', link: '/zh-CN/faq' },
               { text: '故障排查', link: '/zh-CN/troubleshooting' },
diff --git a/docs/.vitepress/theme/style.css b/docs/.vitepress/theme/style.css
index 03029e0d..56ec7d14 100644
--- a/docs/.vitepress/theme/style.css
+++ b/docs/.vitepress/theme/style.css
@@ -132,3 +132,46 @@
   --vp-custom-block-tip-code-bg: var(--vp-c-brand-soft);
 }
 
+/**
+ * Component: Navigation
+ * -------------------------------------------------------------------------- */
+
+@media (min-width: 768px) and (max-width: 1279px) {
+  /* Keep the search entry visible on medium desktop widths where nav links are the tightest. */
+  .VPNavBarSearch {
+    flex: 0 0 auto;
+    padding-left: 16px;
+  }
+
+  .VPNavBarSearch .VPNavBarSearchButton {
+    min-width: 0;
+    padding: 8px 10px;
+  }
+
+  .VPNavBarSearch .keys {
+    display: none;
+  }
+
+  .VPNavBarMenu {
+    min-width: 0;
+  }
+
+  .VPNavBarMenu .VPNavBarMenuLink,
+  .VPNavBarMenu .VPFlyout .button {
+    padding-left: 10px;
+    padding-right: 10px;
+    font-size: 13px;
+  }
+}
+
+@media (min-width: 1280px) {
+  /* Reserve stable room for the search button before appearance and social actions appear. */
+  .VPNavBarSearch {
+    min-width: 176px;
+  }
+
+  .VPNavBarSearch .VPNavBarSearchButton {
+    justify-content: space-between;
+    min-width: 176px;
+  }
+}