.mask {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  color:#fff;
  background-color: rgba(0, 0, 0, .5);
  z-index: 999;
}

.mask-content {
  min-width: 200px;
  min-height: 100px;
  padding: 10px 0;
  border-radius: 5px;
  box-sizing: border-box;
  background-color: #fff;
}

.mask-footer {
  margin-top: 33px;
}

.mask-button__close {
  display: inline-block;
  width: 33px;
  height: 33px;
  background-size: cover;
  background-image: url('https://julyedu-cdn.oss-cn-beijing.aliyuncs.com/newyear20/H5/close-btn.png');
}