外置服务楼梯与平台

提示词

依据确认模型表现外置服务楼梯，各梯段与平台对应楼层可读，保留栏杆和出口位置，不合并或新增梯段。

Use the confirmed model to show an external service stair, making flights and landings readable against their floors while retaining railings and exit positions without merging or adding flights.