车行栏杆臂升降状态

提示词

仅按目标参考调整指定车行栏杆臂的升降角度，机箱、支点、车辆及地面标线不变，阴影只在允许范围内更新。

Change only the selected vehicle barrier arm to the target angle, retaining housing, pivot, vehicles, and ground markings and updating its shadow only within the permitted area.