body{ background: url(1.jpg) no-repeat;margin: 0;padding: 0;background-size: contain;}
.zj{width:62%; height:auto; margin:0 auto}

.ff{ float:left; width:70%;height:auto;}
.sj{ float:right;width:30%;height:auto; padding-top:175px;}
.zj-2{ width:100%; padding-top:55%; margin: 0 auto;}