.rem750{ width: 7.5rem; }
.pos-rel{position: relative;}
.pos-abs{position: absolute;}
.mla{margin-left: auto;}
.mra{margin-right: auto;}
.aC{text-align: center;}
.copyright{height: 8.60rem;background-size: 7.5rem 8.6rem;}
.copyright-txt{width:100%;top:9rem;position:absolute;color: #868793;font-size: .24rem;line-height: 0.24rem;}
.fix:after{
    content: '';width: 100%;display: block;clear: both;
}

img{
    margin-top: -2px;
}