diff --git a/start.sh b/start.sh
index ae0fd42..407287f 100755
--- a/start.sh
+++ b/start.sh
@@ -35,7 +35,7 @@ sleep 3
 
 # 启动前端
 echo "🚀 启动前端服务 (端口 4000)..."
-cd "$FRONTEND_DIR"
+cd "$FRONTEND_DIR/build"
 nohup python3 -m http.server 4000 --bind 127.0.0.1 > /tmp/monitoring-frontend.log 2>&1 &
 FRONTEND_PID=$!