.comp-banner{width:100%;position:relative;cursor:pointer;z-index:1010}.comp-banner .bg-img{width:1280px;margin:auto;height:100%;background-position:50% 0;background-repeat:no-repeat;background-size:cover}.comp-banner .link-close{position:absolute;top:12px;right:20px;height:18px;width:18px;cursor:pointer;background-size:18px 18px;background-repeat:no-repeat;background-image:url(https://edu-wenku.bdimg.com/v1/pc/view/HeaderWrapper/CompBanner/icon_close.png)}.header-wrapper{background:#fff;transition:top .3s;width:100%;min-height:60px;top:0}