.banner{position: relative;}
.banner-pic{max-width:1920px;margin:0 auto;width:100%;position: relative;z-index:1;}
.banner-pic img{width:100%;height:auto;}
.banner a.logo{display:block;width:11%;height:11.6%;background:transparent;position: absolute;left:23%;top:4.5%;z-index:2;}
.main-box{max-width:1060px;margin:0 auto;}
.main-box .img-box a{display: block;}
.main-box .img-box img{max-width:100%;height:auto;}