跨越沟谷的步道桥

提示词

依据给定场地资料表现步道桥跨越沟谷，桥面与两端落地位置对应，沟底、植被和桥下空间不被填平。

Use the supplied site information to show a footbridge crossing a gully, matching its deck to both landing points and retaining the gully floor, vegetation, and open space below.