.header{width:1200px;margin:0 auto;height:70px}.header .logo{width:102px;height:48px;float:left;margin-top:11px}.header .logo img{width:102px}.header .nav{float:left;height:40px;margin-top:15px;margin-left:100px}.header .nav a{margin:0 30px;color:#222;display:inline-block;height:40px;line-height:37px}.header .nav .router-link-active{border-bottom:3px solid #006bd3}