.headder{background:#fff;height:80px;box-shadow:0 2px 4px 0 hsla(0,0%,76.5%,.3)}.head-cont{padding:15px 25px 0 25px}.logo-lk>a{line-height:40px}.logo-lk>i{margin:0 5px;font-weight:700}.logo-lk .logo-c{display:inline-block;vertical-align:top;max-width:180px;height:40px;overflow:hidden}.logo-lk .logo-c>img{width:100%}.logo-lk .logo-c>span{font-size:22px;margin:0 5px 0 10px;font-weight:700}.logo-lk .link-home{font-size:16px;color:#000;letter-spacing:2px}.footer{background-color:#3a486f}.i_copyright{line-height:16px;color:#fff;padding:14px 0;text-align:center;white-space:pre}.main{min-height:calc(100vh - 80px)}.course-menunav a{display:block;line-height:65px}