#classroom_nav{position:relative;left:0;top:0;margin-top:-20px;margin-bottom:50px;width:100%;height:311px;overflow:hidden;background:url(/static/pages/static/images/classroom/public/banner.png) left top no-repeat}#classroom_nav .container{position:relative;height:100%;width:100%}#classroom_nav .classroom_nav_title{padding-left:60px;font-family:'微软雅黑';padding-top:40px}#classroom_nav .classroom_nav_title h2{color:#eee;font-size:30px;font-weight:400}#classroom_nav .classroom_nav_title p{color:#fff;font-size:40px;margin:0}#classroom_nav .classroom-nav-tabs{position:absolute;left:0;bottom:0;width:100%;height:50px;line-height:50px;padding:0;margin-bottom:0}#classroom_nav .classroom-nav-tabs li{background:#2d3851;border-right:1px solid #bbb}#classroom_nav .classroom-nav-tabs li:last-child{border:0}#classroom_nav .classroom-nav-tabs li:hover,#classroom_nav .classroom-nav-tabs li.active{background:#f90}#classroom_nav .classroom-nav-tabs li a{display:inline-block;width:100%;height:100%;color:#fff;font-family:'微软雅黑';font-size:18px}