html,body {    background: url(http://www.eeo.com.cn/zt/2020/autoShow2020/images/bg.jpg) repeat-y; background-size: 100% auto;color:#fff;--mainColor:#83aadf;--mainWidth:1200px;}
.content{width:var(--mainWidth);margin:auto;}
@media screen and (max-width: 1200px){
    .content{width:90%;}
}

.part{padding:4em 0;}
.part a{color:#fff;;}
.part a:hover{color:var(--mainColor);}
@media screen and (max-width: 1200px){
    .part{padding:2em 0;}
}

#part1.banner{margin:0;}