* { padding:0; margin:0; box-sizing:border-box; } #container { margin:20px auto; width:500px; height:300px; } .banner { position:relative; width:500px; height:300px; } li { list-style:none; position:absolute; top:0; left:0; } .none { display:none; }
更新时间:2019-11-04 11:12:29