.downloadList {
  max-width: 1200px;
  margin: 0 auto;
}
.downloadList > .row > .col {
  padding: 0;
  display: flex;
  justify-content: center;
}
.downloadList > .row > .col > .card {
  max-width: 228px;
  height: 332px;
  border-radius: 5px;
  border: 0;
  box-shadow: 0px 3px 7px 0px rgba(0, 0, 0, 0.13);
  position: relative;
  margin-left: 0;
}
.downloadList > .row > .col:hover > .mask {
  visibility: visible;
}
.mask {
  width: 228px;
  height: 332px;
  background-color: rgba(0, 0, 0, 0.45);
  position: absolute;
  top: 0;
  text-align: center;
  visibility: hidden;
}
.mask > p {
  position: relative;
  top: 178px;
  text-align: center;
  font-size: 16px;
  color: #ffffff;
}
.mask > a {
  display: block;
  width: 105px;
  height: 30px;
  line-height: 30px;
  background: #20a5f0;
  border-radius: 4px;
  border: 0;
  color: #fff;
  font-size: 14px;
  position: relative;
  top: 253px;
  left: 50%;
  transform: translateX(-50%);
  cursor: pointer;
}