diff --git a/Dockerfile b/Dockerfile
index d76f07d..3de9f8a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,6 @@
 # ── Stage 1: build ───────────────────────────────────────────────────────────
+# Compiles native extensions (ckzg, asyncpg, cryptography) so the final image
+# only carries the compiled .so files, not the build toolchain.
 FROM python:3.11-slim AS builder
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
@@ -10,23 +12,19 @@ WORKDIR /build
 RUN pip install --no-cache-dir --upgrade pip wheel setuptools
 
 COPY requirements.txt .
-# 直接打包安装到标准的 site-packages 路径中，方便后面拷贝
-RUN pip install --no-cache-dir --user -r requirements.txt
+RUN pip install --no-cache-dir --prefix=/install -r requirements.txt
 
 
 # ── Stage 2: runtime ─────────────────────────────────────────────────────────
 FROM python:3.11-slim
 
+# Only runtime shared libs needed (libpq for asyncpg, libgomp for numpy if used)
 RUN apt-get update && apt-get install -y --no-install-recommends \
     libpq5 curl \
     && rm -rf /var/lib/apt/lists/*
 
-# 【核心修改】直接从 builder 的用户目录下把装好的第三方库拷贝过来
-COPY --from=builder /root/.local /root/.local
-
-# 【核心修改】将拷贝过来的库路径加入到环境变量中，确保 Python 100% 能找到它们
-ENV PATH=/root/.local/bin:$PATH
-ENV PYTHONPATH=/root/.local/lib/python3.11/site-packages:$PYTHONPATH
+# Copy compiled packages from builder
+COPY --from=builder /install /usr/local
 
 WORKDIR /app
 COPY . .
@@ -35,14 +33,8 @@ RUN chmod +x entrypoint.sh
 
 # Non-root user
 RUN useradd -m appuser && chown -R appuser /app
-# 确保新创建的 appuser 也有权限读取拷贝过来的第三方库
-RUN cp -R /root/.local /home/appuser/ && chown -R appuser:appuser /home/appuser/.local
-
-ENV PATH=/home/appuser/.local/bin:$PATH
-ENV PYTHONPATH=/home/appuser/.local/lib/python3.11/site-packages:$PYTHONPATH
-
 USER appuser
 
 EXPOSE 8000
 
-ENTRYPOINT ["./entrypoint.sh"]
\ No newline at end of file
+ENTRYPOINT ["./entrypoint.sh"]