diff --git a/Dockerfile b/Dockerfile
index 73c0830..9cf5a4c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
-# ---- Frontend build ----
-FROM node:22-alpine AS frontend-build
+# ---- Frontend build (仅构建机原生架构编译一次) ----
+FROM --platform=$BUILDPLATFORM node:22-alpine AS frontend-build
 WORKDIR /app
 COPY package.json pnpm-lock.yaml .npmrc ./
 RUN corepack enable && corepack prepare pnpm@10 --activate && pnpm install