a{
    outline: 0;
    text-decoration: none;
}
img{
    border: none;
    vertical-align: middle;
}
ul li{
    list-style: none;
}
/* 课程分类 */
.course-filter-list{
    position: relative;
    background-color: #fff;
    z-index: 1;
}
.course-filter{
    overflow: hidden;
    background-color: #fff;
    box-shadow: 0 0px 5px 0 rgb(28 31 33 / 10%);
}
.course-filter:hover{
    height: auto;
}
.course-filter-container{
    /* width: 1140px; */
    margin: 0 auto;
}
@media (min-width:1300px){
    .course-filter-container{
        /* width: 1240px; */
    }
}
.course-nav-box{
    margin-top: 10px;
}
.course-nav-row{
    position: relative;
    padding: 5px 0;
    overflow: hidden;
}
.course-nav-title{
    float: left;
    height: 28px;
    line-height: 28px;
    font-size: 15px;
    color: #333;
    font-weight: bold;
}
.course-nav-sort{
    margin-left: 55px;
}
.course-nav-sort ul{
    /* max-width: 90%; */
    list-style: none;
}
.course-nav-sort li{
    display: inline-block;
    margin: 0 4px;
}
.course-nav-sort li.active a {
    background-color: #b1d3f7;
    color: #56a8ff;
    border-radius: 4px;
}
.course-nav-sort li a:hover{
    color: #56a8ff;
}
.course-nav-sort a {
    display: block;
    padding: 4px 12px;
    margin-bottom: 10px;
    font-size: 15px;
    color: #333;
}
.course-filter .course-nav-row + .course-nav-row {     
    display: none; 
}
.course-filter:hover .course-nav-row + .course-nav-row { 
    display: block; 
}
/* ============================== */
/* 课程列表 */
.container{
    width: 100%;
    margin: 0 auto;
    background-color: #fff;
}
.wrapper{
    overflow: visible;
    margin: 0 auto;
}
@media (min-width: 1200px){
    .wrapper {
        /* width: 1140px; */
    }
}
@media (min-width: 1300px){
    .wrapper {
        /* width: 1300px; */
    }
}

.first-wrapper{
    /* padding: 30px 0; */
}

.item-header{
    line-height: 30px;
    margin-bottom: 20px;
    padding: 20px;
}
.item-header-title{
    display: inline-block;
    font-size: 20px;
    color: #333;
}
/* 小三角 */
.item-header h2::before {
    content: "";
    display: inline-block;
    width: 0;
    height: 0;
    border-width: 8px;
    border-style: solid;
    border-color: transparent transparent transparent #56a8ff;
    vertical-align: middle;
    margin-right: 6px;
    margin-bottom: 2px;
}
.item-header-more{
    float: right;
    font-size: 14px;
    color: #666;
    transition: color .1s linear 0s;
}
.item-header-more:hover{
    color: #56a8ff;
}


/* 课程推荐1 左部区域 */
.recommend{
    display: flex;
}

.recommend-item{
    margin-left: 0;
    overflow: hidden;
    z-index: 999;
    display: flex;
    flex-wrap: wrap;
    /* width: 1375px; */
}

.recommend-item li{
    width: 23%;
    height: auto;
    margin: 0 24px 24px 0;
}
/* @media (min-width: 1300px){
    .recommend-item li {
        margin: 0 24px 24px 0;
    }
} */

.course-box{
    box-shadow: 0px 2px 3px rgb(0 0 0 / 10%);
    border-radius: 4px;
    overflow: hidden;
    background:#fff;
    display: block;
    color: #333;
}
.course-img{
    position: relative;
    height: 120px;
    line-height: 120px;
    text-align: center;
    background-color: #ddd;
    border-radius: 6px;
}
.course-img img{
    border-radius: unset;
    display: block;
    width: 100%;
    height: 100%;
}
.strech-body{
    position: relative;
    padding: 0 !important;
}
.strech-block{
    position: relative;
    top: 0;
    background: #fff;
    padding: 0 10px 20px;
    transition: top 0.24s linear;
}
.course-box:hover .strech-block {
    top: -56px; 
}
.strech-block .course-name{
    padding-top: 20px;
}
.course-name{
    font-size: 15px;
    font-weight: 600;
    padding-top: 10px;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
}
.course-desc{
    box-sizing: content-box;
    line-height: 21px;
    height: 40px;
    font-size: 13px;
    color: #666;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    padding: 8px 0 0;
}
.strech-mask{
    display: flex;
    justify-content: flex-end;
    flex-direction: column;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: #fff;
    padding: 8px 10px 10px;
    height: 50%;
}
.course-price{
    padding-top: 8px;
    font-size: 14px;
    color: #56a8ff;
}
.strech-mask .cur-price{
    font-size: 16px;
}
.strech-mask .vip-box{
    float: right;
}
.vip-tag{
    background: #ffebc3;
    color: #633b00;
    padding: 2px 6px;
    font-size: 12px;
    border-radius: 4px;
}

/* 课程推荐右部区域 */
.recommend-right{
    width: 220px;
    padding-bottom: 25px;
}
@media (min-width: 1300px){
    .recommend-right {
        width: 220px;
    }
}
.hotdegree-billbord{
    background: #fff;
    border-radius: 4px;
    box-shadow: 0 2px 3px rgb(0 0 0 / 10%);
    padding: 17px 0 26px;
    box-sizing: border-box;
}
.billbord-head{
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 800;
    color: #333;
}
.billbord-trophy{
    display: inline-block;
    background-image: url(../../img/course/trophy.png);
    background-position: center;
    background-size: 100% 100%;
    width: 19px;
    height: 19px;
    margin-right: 8px;
}
.billbord-list{
    padding: 24px 15px 0;
}
.billbord-item{
    display: block;
    padding-bottom: 20px;
    height: 40px;
}

.course-info{
    display: flex;
    align-items: center;
    margin-bottom: 5px;
}
.serial-number{
    flex-shrink: 0;
    margin-right: 15px;
    background-position: center;
    background-repeat: no-repeat;
    background-size: 100%;
    width: 14px;
    height: 24px;
}
.serial1{
    background-image: url(../../img/course/billbord-one.png);
}
.serial2{
    background-image: url(../../img/course/billbord-two.png);
}
.serial3{
    background-image: url(../../img/course/billbord-three.png);
}
.serial4{
    background-image: url(../../img/course/billbord-four.png);
}
.serial5{
    background-image: url(../../img/course/billbord-five.png);
}
.serial6{
    background-image: url(../../img/course/billbord-six.png);
}

.course-name{
    padding-top: 0;
    font-size: 14px;
    color: #333;
    font-weight: 600;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
    transition: color .1s linear 0s;
}
.course-name:hover{
    color: #56a8ff;
}
.billbord-more{
    display: block;
    text-align: center;
    font-size: 14px;
    color: #999;
    transition: color .1s linear 0s;
}
.billbord-more:hover{
    color: #56a8ff;
}
/* 下拉框的隐藏 */
.course-nav-detail{
    display:none;
}
/* 顶部banner图 */
.topBannerBar{
    width:100%;
}