.banner {
  width: 100%;
  max-height: 350px;
  margin-bottom: 20px;
}
.banner img {
  width: 100%;
  height: 350px;
}
.product-box {
  padding: 30px 50px 0 50px;
}
.product-box .item {
  position: relative;
  margin-right: 0.15rem;
  display: block;
  float: left;
  margin-bottom: 20px;
}
.product-box .item .pic {
  width: 3.09rem;
  height: 2.32rem;
}
.product-box .item:nth-child(4n) {
  margin-right: 0;
}
.product-box .item .title {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 3.09rem;
  height: 58px;
  background: #333333;
  opacity: 0.6;
  font-size: 20px;
  font-weight: bold;
  color: #FFFFFF;
  line-height: 58px;
  text-align: center;
}