使的dialog上下左右居中(弹框居中)

.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;
  }