.art-list {
  display: flex;
  flex-wrap: wrap;
}
.art-list .art-item {
  width: 390px;
  background-color: #fff;
  margin-bottom: 30px;
  margin-right: 20px;
}
.art-list .art-item img {
  width: 100%;
  height: 320px;
}
.art-list .art-item:nth-child(3n) {
  margin-right: 0;
}
.art-list .art-item .content {
  padding: 20px;
}
.art-list .art-item .content p:nth-child(1) {
  font-weight: bold;
}
.art-list .art-item .content p:nth-child(2) {
  font-size: 16px;
  margin-top: 10px;
}