diff --git a/app/api/chat/route.ts b/app/api/chat/route.ts
index ed2ba00..e570f1f 100644
--- a/app/api/chat/route.ts
+++ b/app/api/chat/route.ts
@@ -1,6 +1,9 @@
 import { streamText, UIMessage, convertToModelMessages } from "ai";
 import { getModel, requiresApiKey, type AIProvider } from "@/lib/ai/models";
 import { buildSystemMessage } from "@/lib/ai/prompt";
+import { source } from "@/lib/source";
+import fs from "fs/promises";
+import path from "path";
 
 // 流式响应最长30秒
 export const maxDuration = 30;
@@ -39,6 +42,27 @@ export async function POST(req: Request) {
       );
     }
 
+    // 如果有 slug 但没有 content，尝试在服务端读取内容
+    if (pageContext?.slug && !pageContext.content) {
+      try {
+        const slugArray = pageContext.slug.split("/");
+        const page = source.getPage(slugArray);
+
+        if (page) {
+          const fullFilePath = path.join(process.cwd(), "app/docs", page.path);
+          const rawContent = await fs.readFile(fullFilePath, "utf-8");
+          pageContext.content = extractTextFromMDX(rawContent);
+        }
+      } catch (error) {
+        console.warn(
+          "Failed to fetch content for slug:",
+          pageContext.slug,
+          error,
+        );
+        // 出错时不中断，只是缺少上下文
+      }
+    }
+
     // 构建系统消息，包含页面上下文
     const systemMessage = buildSystemMessage(system, pageContext);
 
@@ -67,3 +91,28 @@ export async function POST(req: Request) {
     );
   }
 }
+
+// 提取纯文本内容，过滤掉 MDX 语法
+function extractTextFromMDX(content: string): string {
+  let text = content
+    .replace(/^---[\s\S]*?---/m, "") // 移除头部元数据 (frontmatter)
+    .replace(/```[\s\S]*?```/g, "") // 移除代码块
+    .replace(/`([^`]+)`/g, "$1"); // 移除内联代码符号，保留内容
+
+  // 递归移除 HTML/MDX 标签，防止嵌套标签清理不干净
+  let prevText;
+  do {
+    prevText = text;
+    text = text.replace(/<[^>]+>/g, "");
+  } while (text !== prevText);
+
+  return text
+    .replace(/\*\*([^*]+)\*\*/g, "$1") // 移除粗体符号，保留文字
+    .replace(/\*([^*]+)\*/g, "$1") // 移除斜体符号，保留文字
+    .replace(/#{1,6}\s+/g, "") // 移除标题符号 (#)
+    .replace(/\[([^\]]+)\]\([^)]+\)/g, "$1") // 移除链接语法，仅保留链接文本
+    .replace(/!\[([^\]]*)\]\([^)]+\)/g, "$1") // 移除图片语法，保留 alt 文本
+    .replace(/[#*`()[!\]!]/g, "") // 移除剩余的常用 Markdown 符号
+    .replace(/\n{2,}/g, "\n") // 规范化换行，将多余的空行合并
+    .trim();
+}
diff --git a/app/components/DocsAssistant.tsx b/app/components/DocsAssistant.tsx
index 139f98a..91459cf 100644
--- a/app/components/DocsAssistant.tsx
+++ b/app/components/DocsAssistant.tsx
@@ -15,7 +15,6 @@ import {
 interface PageContext {
   title?: string;
   description?: string;
-  content?: string;
   slug?: string;
 }
 
diff --git a/app/docs/[...slug]/page.tsx b/app/docs/[...slug]/page.tsx
index 7964685..64c62e2 100644
--- a/app/docs/[...slug]/page.tsx
+++ b/app/docs/[...slug]/page.tsx
@@ -14,31 +14,8 @@ import { Contributors } from "@/app/components/Contributors";
 import { DocsAssistant } from "@/app/components/DocsAssistant";
 import { LicenseNotice } from "@/app/components/LicenseNotice";
 import { PageFeedback } from "@/app/components/PageFeedback";
-import fs from "fs/promises";
-import path from "path";
-
-// Extract clean text content from MDX
-function extractTextFromMDX(content: string): string {
-  let text = content
-    .replace(/^---[\s\S]*?---/m, "") // Remove frontmatter
-    .replace(/```[\s\S]*?```/g, "") // Remove code blocks
-    .replace(/`([^`]+)`/g, "$1"); // Remove inline code
-  // Remove HTML/MDX tags recursively to prevent incomplete multi-character sanitization
-  let prevText;
-  do {
-    prevText = text;
-    text = text.replace(/<[^>]+>/g, "");
-  } while (text !== prevText);
-  return text
-    .replace(/\*\*([^*]+)\*\*/g, "$1") // Remove bold
-    .replace(/\*([^*]+)\*/g, "$1") // Remove italic
-    .replace(/#{1,6}\s+/g, "") // Remove headers
-    .replace(/\[([^\]]+)\]\([^)]+\)/g, "$1") // Remove links, keep text
-    .replace(/!\[([^\]]*)\]\([^)]+\)/g, "$1") // Remove images, keep alt text
-    .replace(/[#*`()[!\]!]/g, "") // Remove common markdown symbols
-    .replace(/\n{2,}/g, "\n") // Normalize line breaks
-    .trim();
-}
+// Extract clean text content from MDX - no longer used on client/page side
+// content fetching moved to API route for performance
 
 interface Param {
   params: Promise<{
@@ -67,20 +44,6 @@ export default async function DocPage({ params }: Param) {
     getDocContributorsByDocId(docIdFromPage);
   const Mdx = page.data.body;
 
-  // Prepare page content for AI assistant
-  let pageContentForAI = "";
-  try {
-    const fullFilePath = path.join(process.cwd(), "app/docs", page.file.path);
-    const rawContent = await fs.readFile(fullFilePath, "utf-8");
-    const extractedText = extractTextFromMDX(rawContent);
-    // Use full extracted content without truncation
-    pageContentForAI = extractedText;
-  } catch (error) {
-    console.warn("Failed to read file content for AI assistant:", error);
-    // Fallback to using page metadata
-    pageContentForAI = `${page.data.title}\n${page.data.description || ""}`;
-  }
-
   return (
     <>
       <DocsPage toc={page.data.toc}>
@@ -104,7 +67,6 @@ export default async function DocPage({ params }: Param) {
         pageContext={{
           title: page.data.title,
           description: page.data.description,
-          content: pageContentForAI,
           slug: slug?.join("/"),
         }}
       />