使elementUI的dialog上下左右居中

.el-dialog{
  display: flex;
  flex-direction: column;
  margin:0 !important;
  position:absolute;
  top:50%;
  left:50%;
  transform:translate(-50%,-50%);
  /*height:600px;*/
  max-height:calc(100% - 30px);
  max-width:calc(100% - 30px);
}
.el-dialog .el-dialog__body{
  flex:1;
  overflow: auto;
}