.waterfall-dl {
  column-count: 3;
  column-gap: 15px;
}
.waterfall-dl dd {
  margin-bottom: 15px;
}
.waterfall-dl dd .list-a {
  display: block;
  border-radius: 5px;
  overflow: hidden;
}
.waterfall-dl dd .list-a img {
  display: block;
  width: 100%;
}

@media screen and (max-width: 768px) {
  .waterfall-dl {
    column-count: 2;
    column-gap: 10px;
  }
  .waterfall-dl dd {
    margin-bottom: 10px;
  }
}