.button button{margin-right:20px;margin-bottom:20px}.vertical-center-modal{display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center}.vertical-center-modal .ivu-modal{top:0}