📅  最后修改于: 2022-03-11 14:47:57.708000             🧑  作者: Mango
position:absolute;
top:50%;
left:50%;
transform: translate(-50%,-50%);
-webkit-transform: translate(-50%,-50%);
-ms-transform: translate(-50%,-50%);
-moz-transform: translate(-50%,-50%);