.modal-mask {
  width: 100%;
  height: 100%;
  position: fixed;
  top: 0;
  left: 0;
  background: #000;
  opacity: 0.5;
  overflow: hidden;
  z-index: 9000;
  color: #fff;
}

.modal-dialog {
  width: 540rpx;
  overflow: hidden;
  position: fixed;
  top: 50%;
  left: 50%;
  margin-right: -50%;
  transform: translate(-50%, -50%);
  z-index: 9999;
  background: #f9f9f9;
  border-radius: 36rpx;
}