diff --git a/start.sh b/start.sh
index 844a0ce..423a7a0 100755
--- a/start.sh
+++ b/start.sh
@@ -14,9 +14,16 @@ if [ ! -d "node_modules" ]; then
     exit 1
 fi
 
-# 杀掉旧进程
-lsof -ti:3000 | xargs kill -9 2>/dev/null || true
-lsof -ti:5173 | xargs kill -9 2>/dev/null || true
+# 检测并清理端口冲突
+for PORT in 3000 5173; do
+  PID=$(lsof -ti:$PORT 2>/dev/null || true)
+  if [ -n "$PID" ]; then
+    echo "⚠️  端口 $PORT 被占用 (PID: $PID)，正在释放..."
+    kill -9 $PID 2>/dev/null || true
+    sleep 0.5
+    echo "   ✅ 端口 $PORT 已释放"
+  fi
+done
 
 # 启动后端 Agent Chat Server
 echo "🔌 启动 Agent Server (端口 3000)..."