.productView{
    width: 100%;
    text-align: center;
}
.productView img{
    max-width: 100%;
}
.back{
    width: 100%;
    display: block;
    text-align: center;
}
.back a{
    display: inline-block;
    padding: .2rem .6rem;
    font-size: .16rem;
    color: #000;
    border: 1px solid #333;
    margin: .5rem auto;
    position: relative;
    z-index: 1;
}
.back a:hover{
    color: #fff;
}
.back a::after{
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: 0;
    height: 0;
    background: #333;
    opacity: 0;
    z-index: -1;
    transition: all 0.3s ease-in-out
}
.back a:hover::after{
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    opacity: 1;
}