.product-box {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding: 0.4rem 0.25rem 0.4rem 0.25rem;
  min-height: calc(100vh - 4.6rem - 0.6rem - 2.5rem - 1.1rem);
}
.product-box .item {
  position: relative;
  display: block;
  margin-bottom: 0.2rem;
  width: 3.38rem;
  height: 2.52rem;
}
.product-box .item img {
  width: 100%;
  height: 100%;
}
.product-box .item:nth-child(n+4) {
  margin-right: 0;
}
.product-box .item .title {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 0.62rem;
  background: #333333;
  opacity: 0.6;
  font-size: 0.24rem;
  font-weight: bold;
  color: #FFFFFF;
  line-height: 0.62rem;
  text-align: center;
}