要使用CSS创建图层，您可以尝试运行以下代码。我已经使用了z-index属性
<html> <head> </head> <body> <div style = "background-color:red; width:300px; height:100px; position:relative; top:10px; left:80px; z-index:2"> </div> <div style = "background-color:yellow; width:300px; height:100px; position:relative; top:-60px; left:35px; z-index:1;"> </div> <div style = "background-color:green; width:300px; height:100px; position:relative; top:-220px; left:120px; z-index:3;"> </div> </body> </html>