.mask {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, .7);
  z-index: 99999;
  /* display: none; */
}
.mask-diong {
  width: 320px;
  background-color: #fff;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  border-radius: 4px;
}
.mask-title {
  width: 100%;
  height: 50px;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content : space-between;
}
.mask-txt {
  font-size: 14px;
  color: #333;
  font-weight: 500;
}
.close {
  width: 10px;
  height: 10px;
  display: block;
  opacity: 1;
}
.mask-main {
  width: 100%;
  height: 270px;
}
.mask-code {
  width: 120px;
  height: 120px;
  display: block;
  margin: 30px auto;
}
.mask-main p {
  font-size: 14px;
  color: #333;
  line-height: 26px;
  text-align: center;
}