我设想的效果是这样https://www.bilibili.com/video/BV19Z4y1q7K3?share_medium=android&share_plat=android&share_source=WEIXIN&share_tag=s_i×tamp=1655550790&unique_k=rSQ7F0c%EF%BC%8C%E6%9C%89%E5%A4%A7%E4%BD%AC%E5%8F%AF%E4%BB%A5%E5%BC%80%E5%8F%91%E4%B8%80%E4%B8%AA%E5%90%97%EF%BC%8C%E6%9C%89%E4%BA%9B%E6%B8%B8%E6%88%8F%E7%9C%9F%E7%9A%84%E5%BE%88%E8%AE%A9%E4%BA%BA%E6%B2%89%E6%B2%A6%EF%BC%8C