.product_bg {
  background: url(../../static/img/wulian/product_banner.png) no-repeat center center;
}

.section-1 {
  padding: 100px 0;
  background-color: #f2f2f2;
  display: flex;
}

.section-1 .layui-container {
  display: flex;
  justify-content: space-between;
}

.section-1 .layui-container .mob-nav-button {
  display: none;
}

.section-1 .layui-container .product-nav {
  width: 200px;
}

.section-1 .layui-container .product-nav .layui-nav {
  background-color: #e6e6e6;
}

.section-1 .layui-container .product-nav .layui-nav .layui-this {
  background-color: #fff;
  background-color: rgba(255, 51, 51, 0.3);
}

.section-1 .layui-container .product-nav .layui-nav-tree .layui-nav-item a {
  font-size: 24px;
  color: #333333;
  height: 76px;
  line-height: 76px;
  text-align: center;
  letter-spacing: 1px;
}

.section-1 .layui-container .product-nav .layui-nav-tree .layui-nav-child dd.layui-this a {
  background-color: rgba(255, 51, 51, 0.3);
}

.section-1 .layui-container .product-nav .layui-nav-tree .layui-nav-itemed {
  background-color: rgba(255, 51, 51, 0.3);
}

.section-1 .layui-container .product-nav .layui-nav-tree .layui-nav-item a:hover {
  background-color: rgba(255, 51, 51, 0.3);
}

.section-1 .layui-container .product-nav .layui-nav-child dd {
  background-color: #ffffff;
  border: solid 1px #e5e5e5;
}

.section-1 .layui-container .product-nav .layui-nav-tree .layui-nav-child a {
  font-size: 18px;
  color: #161616;
  text-align: center;
  height: 58px;
  line-height: 58px;
}

.section-1 .layui-container .product-content {
  width: calc(100% - 220px);
}

.section-1 .layui-container .product-content .first-nav {
  display: block;
}

.section-1 .layui-container .product-content .first-nav .top-info {
  display: none;
  padding: 40px 20px;
  background-color: #ffffff;
}

.section-1 .layui-container .product-content .first-nav .top-info span {
  display: flex;
  align-items: center;
  font-size: 24px;
  color: #333333;
}

.section-1 .layui-container .product-content .first-nav .top-info span i {
  display: inline-block;
  width: 4px;
  height: 22px;
  background-color: #ff3333;
  margin-right: 4px;
}

.section-1 .layui-container .product-content .first-nav .top-info p {
  font-size: 16px;
  color: #333333;
  line-height: 24px;
  margin-top: 40px;
}

.section-1 .layui-container .product-content .first-nav .active {
  display: block;
}

.section-1 .layui-container .product-content .first-nav .product-list {
  display: block;
}

.section-1 .layui-container .product-content .first-nav .product-list .list-title {
  display: flex;
  align-items: center;
  font-size: 24px;
  color: #333333;
  margin: 25px 20px;
}

.section-1 .layui-container .product-content .first-nav .product-list .list-title span {
  display: inline-block;
  width: 4px;
  height: 22px;
  background-color: #ff3333;
  margin-right: 4px;
}

.section-1 .layui-container .product-content .first-nav .product-list .list-content .item {
  display: block;
  background-color: #ffffff;
  text-align: center;
  height: 240px;
  padding: 50px 0 30px 0;
  cursor: pointer;
}

.section-1 .layui-container .product-content .first-nav .product-list .list-content .item img {
  max-width: 200px;
  height: 200px;
}

.section-1 .layui-container .product-content .first-nav .product-list .list-content .item span {
  display: block;
  font-size: 16px;
  color: #333333;
  margin-top: 20px;
}

@media screen and (max-width: 768px) {
  .section-1 {
    padding: 50px 0;
  }
  .section-1 .layui-container {
    flex-direction: column;
  }
  .section-1 .layui-container .mob-nav-button {
    display: block;
    position: absolute;
    width: 50px;
    height: 50px;
    top: -50px;
    background-color: #ff3333;
    z-index: 49;
  }
  .section-1 .layui-container .mob-nav-button i {
    width: 50px;
    height: 50px;
  }
  .section-1 .layui-container .product-nav {
    z-index: 49;
    width: 100%;
    left: 0px;
  }
  .section-1 .layui-container .product-nav .layui-nav-tree {
    width: 100%;
  }
  .section-1 .layui-container .product-content {
    width: 100%;
  }
}