.body-content {
  position: relative;
  margin-top: 50px;
}
@media screen and (max-width: 768px) {
  .body-content {
    margin-top: 110px;
  }
}
/*.product-nav {
  width: 100%;
  background: #E5E5E5;
  border-bottom: 1px solid #ccc;
  height: 50px;
  line-height: 50px;
  z-index: 10;
  display: block;
  position: fixed;
  top: 60px;
}
.product-nav .airwheel-E3-function-center {
  width: 1055px;
  margin: 0 auto;
}
.product-nav .airwheel-E3-function-center div {
  display: inline-block;
  width: 49.5%;
  box-sizing: border-box;
}
.product-nav .airwheel-E3-function-center div:last-child {
  text-align: right;
}
.product-nav .airwheel-E3-function-center div:last-child a {
  display: inline-block;
  padding: 0 5px;
  text-align: center;
  height: 30px;
  line-height: 30px;
  margin-right: 10px;
  color: #000;
}
.product-nav .airwheel-E3-function-center div:last-child .hover {
  border-bottom: 2px red solid;
}
.product-nav .airwheel-E3-function-center div:last-child a:after {
  height: 2px;
  width: 100%;
  background: red;
  content: "";
  display: block;
  opacity: 0;
  transition: opacity 2s;
  -webkit-transition: opacity 2s;
}
.product-nav .airwheel-E3-function-center div:last-child a:hover:after {
  transition: opacity 2s;
  -webkit-transition: opacity 2s;
  opacity: 1;
}
@media screen and (max-width: 1200px) {
  .product-nav .airwheel-E3-function-center {
    width: 90%;
    margin: 0 5%;
  }
}
@media screen and (max-width: 768px) {
  .product-nav {
    font-size: 0.8rem;
  }
  .product-nav .airwheel-E3-function-center {
    width: 96%;
    margin: 0 2%;
  }
  .product-nav .airwheel-E3-function-center div {
    display: inline-block;
    box-sizing: border-box;
  }
  .product-nav .airwheel-E3-function-center div:first-child {
    text-align: right;
    float: right;
    width: 100px;
  }
  .product-nav .airwheel-E3-function-center div:first-child span {
    padding: 5px 10px;
    background: #3db1fa;
    color: #fff;
  }
  .product-nav .airwheel-E3-function-center div:last-child {
    float: left;
    text-align: left;
    width: 220px;
  }
  .product-nav .airwheel-E3-function-center div:last-child a {
    color: #000;
    padding: 0;
    margin-right: 5px;
  }
  .product-nav .airwheel-E3-function-center div:last-child .hover {
    border-bottom: 2px solid #00a7ea;
    color: #00a7ea;
  }
  .product-nav .airwheel-E3-function-center div:last-child a:hover {
    border-bottom: 2px solid #00a7ea;
  }
  .product-nav .airwheel-E3-function-center div:last-child a:active {
    border-bottom: 2px solid #00a7ea;
    color: #00a7ea;
  }
  .product-nav .airwheel-E3-function-center div:last-child a:after {
    background: none;
  }
  .product-nav .airwheel-E3-function-center div:last-child:after {
    clear: both;
    content: "";
  }
}
@media screen and (max-width: 320px) {
  .product-nav .airwheel-E3-function-center {
    width: 98%;
    margin: 0 1%;
  }
  .product-nav .airwheel-E3-function-center div:last-child {
    width: 213px;
  }
  .product-nav .airwheel-E3-function-center div:last-child a {
    margin-right: 3px;
  }
}*/
.fixedNav {
  position: fixed;
  top: 0;
}
@media screen and (max-width: 768px) {
  .fixedNav {
    position: fixed;
    top: 46px;
  }
}