diff --git a/backend/app/main.py b/backend/app/main.py
index cfe0435..1905db2 100644
--- a/backend/app/main.py
+++ b/backend/app/main.py
@@ -1,10 +1,11 @@
 # app/main.py
 import logging
 import os
-from fastapi.responses import FileResponse
+from pathlib import Path
+from fastapi.responses import FileResponse, HTMLResponse, JSONResponse
 import httpx
 from contextlib import asynccontextmanager
-from fastapi import FastAPI, staticfiles
+from fastapi import FastAPI, HTTPException, Request, staticfiles
 from fastapi.middleware.cors import CORSMiddleware
 from dotenv import load_dotenv
 
@@ -112,14 +113,27 @@ app.add_middleware(
 # 版本控制
 app.include_router(api_router, prefix="/api/v1")
 
-# 把目录改成static对应我们放dist内容的路径就可以
-app.mount("/", staticfiles.StaticFiles(directory="app/static", html=True), name="static")
-
 # 只需要保留API的优先匹配，catch_all可以简化成这样
 @app.get("/api/{full_path:path}")
 async def api_not_found(full_path: str):
     return {"detail": "API Not Found"}
 
+staticPath = staticfiles.StaticFiles(directory="app/static", html=True)
+
+# 把目录改成static对应我们放dist内容的路径就可以
+app.mount("/", staticPath, name="static")
+
+INDEX_HTML = Path("app/static/index.html").read_text(encoding="utf-8")
+
+@app.exception_handler(404)
+async def not_found_handler(request: Request, exc: HTTPException):
+    # 如果是API路径才返回404，前端路径走catch-all不会进这里
+    if request.url.path.startswith("/api/"):
+        return JSONResponse({"detail": "Not Found"}, status_code=404)
+    print("没找到")
+    logging.info("没找到")
+    return HTMLResponse(INDEX_HTML)
+
 # 健康检查
 @app.get("/", tags=["健康检查"])
 async def root():