diff --git a/Dockerfile b/Dockerfile
index 9cf5a4c..7a22b51 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-# ---- Frontend build (仅构建机原生架构编译一次) ----
+# ---- Frontend build ----
 FROM --platform=$BUILDPLATFORM node:22-alpine AS frontend-build
 WORKDIR /app
 COPY package.json pnpm-lock.yaml .npmrc ./
@@ -6,18 +6,25 @@ RUN corepack enable && corepack prepare pnpm@10 --activate && pnpm install
 COPY . .
 RUN pnpm build
 
-# ---- Backend runtime ----
+# ---- Python deps build（带 gcc 编译，产物仅用于复制）----
+FROM python:3.11-slim AS python-deps
+WORKDIR /app
+RUN apt-get update && apt-get install -y --no-install-recommends gcc \
+    && rm -rf /var/lib/apt/lists/*
+COPY backend/requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+# 删除字节码缓存，减小体积
+RUN find /usr/local/lib/python3.11 -type d -name "__pycache__" -exec rm -rf {} + 2>/dev/null || true
+
+# ---- Final runtime ----
 FROM python:3.11-slim
 WORKDIR /app
 
-RUN apt-get update && apt-get install -y --no-install-recommends gcc \
-    && rm -rf /var/lib/apt/lists/*
-
-COPY backend/requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+# 仅复制已编译好的包，无需 gcc
+COPY --from=python-deps /usr/local/lib/python3.11/site-packages /usr/local/lib/python3.11/site-packages
 
 COPY backend/ .
 COPY --from=frontend-build /app/dist ./dist
 
 EXPOSE 8000
-CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]
+CMD ["python", "-m", "uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]
diff --git a/backend/Dockerfile b/backend/Dockerfile
index 2dc80e1..2891fcc 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,18 +1,14 @@
-FROM python:3.11-slim
-
+FROM python:3.11-slim AS python-deps
 WORKDIR /app
-
-# System deps for akshare (pandas/numpy) and network requests
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    gcc \
+RUN apt-get update && apt-get install -y --no-install-recommends gcc \
     && rm -rf /var/lib/apt/lists/*
-
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
+RUN find /usr/local/lib/python3.11 -type d -name "__pycache__" -exec rm -rf {} + 2>/dev/null || true
 
+FROM python:3.11-slim
+WORKDIR /app
+COPY --from=python-deps /usr/local/lib/python3.11/site-packages /usr/local/lib/python3.11/site-packages
 COPY . .
-
-# SQLite db will be created at runtime in /app
 EXPOSE 8000
-
-CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]
+CMD ["python", "-m", "uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]
diff --git a/backend/main.py b/backend/main.py
index 5eff0ef..e75029e 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -1,7 +1,7 @@
 import os
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
-from fastapi.staticfiles import StaticFiles
+from fastapi.responses import FileResponse, JSONResponse
 from contextlib import asynccontextmanager
 from dotenv import load_dotenv
 
@@ -33,6 +33,16 @@ app.include_router(shares.router, prefix="/api/share")
 app.include_router(sectors.router, prefix="/api/sectors")
 
 # 生产模式：后端同时托管前端静态文件
+# catch-all 路由在 API 路由之后注册，所以 API 优先级更高
 dist_path = os.path.join(os.path.dirname(__file__), "dist")
 if os.path.isdir(dist_path):
-    app.mount("/", StaticFiles(directory=dist_path, html=True), name="static")
+    @app.get("/{full_path:path}")
+    async def serve_spa(full_path: str):
+        file_path = os.path.join(dist_path, full_path) if full_path else os.path.join(dist_path, "index.html")
+        if os.path.isfile(file_path):
+            return FileResponse(file_path)
+        # SPA fallback: 非文件路径统一返回 index.html
+        index_path = os.path.join(dist_path, "index.html")
+        if os.path.isfile(index_path):
+            return FileResponse(index_path, media_type="text/html")
+        return JSONResponse({"detail": "Not Found"}, status_code=404)