@charset "utf-8";
.tab-nav{border-bottom: 1px solid #d8d8d8;padding-top: 30px;margin-bottom: 30px;}
.tab-nav a{
    display: inline-block;
    width: 120px;
    height: 38px;
    font-size: 16px;
    color: #333333;
    text-align: center;
    line-height: 38px;
}
.tab-nav a.on{
    border: 1px solid #d8d8d8;
    border-top: 3px solid #ff6949;
    border-bottom: 1px solid #f5f5f5;
    color: #ff6949;
    margin-bottom: -1px;
}
.lessons-cho{background: #f5f5f5;}
.tab-box1{padding-bottom: 20px;}
.tab-box2{padding-bottom: 30px;}
.tab-box-ul{width: 1100px;}
.tab-box-ul li,.tab-all{float: left;margin-bottom: 5px;line-height: 25px;font-size: 16px;}
.tab-all,.tab-box-ul li a{display: inline-block;
    padding: 0 10px;text-align: center;color: #212020;margin: 0 5px;border-radius: 4px;
}
.tab-box-ul li a:hover,.tab-all.tab-hover,.tab-box-ul li.tab-hover a{
    background: #ff6949;
    color: #fff;
}
.tab-box2 .tab-box-ul li.no a,.tab-box2 .tab-box-ul li.no{
  display:none;
}
.tab-box2 .tab-box-ul li.no a:hover{background: #f5f5f5;}
.tit-left{line-height: 25px;}
.lessons-main-tit{font-size:16px;line-height: 16px; color: #787d82;padding:30px 0;}
.tit-left a{display: inline-block;margin: 0 15px;}
.tit-left a:hover,.tit-left a.tab-hover{ color: #508deb;
    text-decoration: none;}
.tit-right-a{
    display: inline-block;
    width: 85px;
    height: 25px;
    line-height: 25px;
    text-align: center;
    background: url("../images/lessons-bg.png") no-repeat;
    color: #fff;
    margin:0 20px;
}
.lessons-none {width: 176px;margin: 80px auto 60px;text-align: center;}
.lessons-none img{margin: 0 auto;}
.lessons-none p{
    font-size: 14px;
    line-height: 14px;
    color: #aeaeae;
    margin-top: 35px;
}

.lessons-main{margin-bottom: 40px;}
.cont-right-a{width:209px;overflow:hidden;}