.product-header{
    width: 100%;
    vertical-align: bottom;
}
.product-nav{
    list-style: none;
    display: flex;
    justify-content: center;
    background: #EDF6FF;
    padding: 30px;
}
.product-nav>.product-nav-bar{
    float:left;
    width: 213px;
    height: 50px;
    text-align: center;
    padding: 15px;
    background: #fff;
    border-radius: 10px;
    border: 1px solid #eee;
    cursor: pointer;
    transition: background .5s;
    -moz-user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
    -khtml-user-select: none;
    user-select: none;
    margin-right: 5px;
}
.product-nav>.product-nav-bar:last-child{
    margin-right: 0;
}
.product-nav>.product-nav-bar>a{
    color: #6d6d6d;
    transition: background .5s;
    font-size: 18px;
}
.product-nav>.product-nav-bar:hover{
    background: #4997EC;
    border-color: #EDF6FF;
}
.product-nav>.product-nav-bar:hover>a{
    color: #fff;
}
.product-nav>.product-nav-bar.active{
    background: #4997EC;
    border-color: #EDF6FF;
}
.product-nav>.product-nav-bar.active>a{
    color: #fff;
}
.product-bar{
    padding: 30px;
}
.product-bar .product-box{
    width: 1200px;
    margin: auto;
}
.product-bar-bg{
    background: #FBFBFB;
}
.product-bar .image-box{
    text-align: center;
    margin: 40px 0;
}