.newsitemContent{
    position: relative;
    background: #fff
}
.newsitemContent .banner{
    width: 80%; margin: 0 auto;
}
.newsitemText {
    padding: 0 10%;
    background: #fff;
}
.backTop {
    position: fixed;
    height: .64rem;
    line-height: .64rem;
    color: #fff;
    font-size: .2rem;
    background: rgba(0,0,0,0.7);
    top: 0.6rem;
    left: 0;
    width: 100%;
    z-index: 10;
}
.backTop a{
    color:#fff;
    

}
.backTop a span {
    margin-right: .2rem;
}
@media screen and (max-width: 768px) {
    .newsitemContent{
        padding-top: 0.6rem;
    }
}