模型说明图不加写实环境

提示词

以简洁模型说明图表现给定空间关系，使用均匀底色和克制接触阴影。只保留解释关系所需的对象，不加写实天空、交通或远景建筑。

Explain the given spatial relationship as a simple model diagram with a uniform background and restrained contact shadows. Include only objects needed for the explanation, without realistic sky, traffic, or distant buildings.