- postion & translate(-50%,-50%)
- position & margin-top: negative, margin-left: negative
- flex
-
position & left rigth bottom left 0 margin: auto
- table-cell & margin: auto
标签:center,auto,align,50%,negative,position,margin,CSS,left
来源: https://www.cnblogs.com/dissipate/p/15859496.html