#article {
  line-height: 2;
  color: #666;
}

#article .list {
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
}

#article .list .item {
  width: 25%;
  padding: 10px;
  box-sizing: border-box;
}

#article .list .item .slide {
  padding-bottom: 80% !important;
}

#article .list .item span {
  background-color: #eee;
  display: block;
  text-align: center;
  padding: 10px 0;
}

@media screen and (max-width: 600px) {
  #article .list .item {
    width: 50%;
  }
}