.course .head{height:200px;width:100%;background-image:url(../img/banner2.f73092cd.png)}.course .head .details{width:1280px;margin:0 auto;color:#fff;font-size:14px}.course .head .details .title{height:70px;line-height:70px}.course .head .details .title .coursename{font-size:22px}.course .head .details .title .studyUserCount{margin-left:10px;color:#d7d7d7}.course .head .details .title .courseVersion{margin:0 10px;color:#46b4b4}.course .head .details .title .collection{margin-left:30px;font-size:12px;cursor:pointer}.course .head .details .title .collection i{font-size:14px}.course .head .details .Introduce{text-indent:2em;line-height:22px;font-size:16px}.course .nav{height:60px;text-align:center;line-height:60px;font-size:18px}.course .nav .itemlist{width:1280px;margin:0 auto;text-align:left}.course .nav .itemlist .navItem{width:140px;cursor:pointer;text-align:left}.course .nav .itemlist .navItemHover{width:140px;cursor:pointer;color:#09c}