css垂直水平居中小技巧

1.https://www.smashingmagazine.com/2013/08/absolute-horizontal-vertical-centering-css/

.Center-Container {  position: relative;}.Absolute-Center {  width: 50%;  height: 50%;  overflow: auto;  margin: auto;  position: absolute;  top: 0; left: 0; bottom: 0; right: 0;

2.

.container{    position:absolute;    top:50%;    left:50%;    transform:translate(-50%,-50%);}