body{font-family: 'Microsoft YaHei','\5FAE\8F6F\96C5\9ED1','arial',SimSun,'\5B8B\4F53',SimHei ,"STHeiti Light",STHeiti,"Lucida Grande", Tahoma,Arial, Helvetica, sans-serif;}

.header .con{padding: 4rem 0 4rem;}
.logo{width: 63.7rem;}
.logo2{width: 30%;}
.banner_logo{width: 92rem;margin-top: 4.2rem;margin-bottom: 7.9rem;}

.side .item{font-size: 1.6rem;margin-bottom: 1rem;height: 8.1rem;padding-top: 4.8rem;}
.side .item.on{font-size: 1.8rem;min-width: 150px;}

.nav ul{justify-content: center;}
.nav li > a{margin: 0 2.5rem;}