body{
    background: #FAFAFA;
}

.course-title {
    width: 80%;
    margin: 0 auto;
    margin-top: 80px;
    color: #23453E;
    font-weight: 700;
    font-size: 50px;
    line-height: 120px;
}

.less_top{
    width: 100%;
    background: #fff;
    padding-bottom: 10px;
}
.less_top .middle{
    width: 850px;
    margin: 0 auto;
    font-size: 14px;
}
.less_top .middle .ul{
    clear: both;
    overflow: hidden;
    margin-top: 10px;
}
.less_top .middle .ul .left{
    float: left;
}
.less_top .middle .ul .right{
    float: left;
    width: 822px;
}
.less_top .middle .ul .right .li{
    float: left;
    padding: 1px 10px 1px 10px;
    border-radius: 30px;
    margin-left: 20px;
    margin-bottom: 10px;
    cursor:pointer;
}

.active{
    background: #38DAA6;
    color: #fff;
}

.active:hover{
    background: #38DAA6;
    color: #fff;
}

.xd-button:hover {
    background-color: #4C588C;
    color: #ffffff;
}

.xd-active {
    background-color: #4C588C;
    color: #ffffff;
}

.nj-button:hover {
    background-color: #456664;
    color: #ffffff;
}

.nj-active {
    background-color: #456664;
    color: #ffffff;
}

.less_list{
    width: 850px;
    margin: 0 auto;
    clear: both;
    overflow: hidden;
    padding-bottom: 40px;
}

.less_list ul{
    clear: both;
    overflow: hidden;
    padding: 10px;
}
.less_list ul li{
    width: 31%;
    height: 300px;
    background: #fff;
    box-shadow: 2px 2px 9px #ddd;
    float: left;
    margin-top: 20px;
}
.less_list ul li:nth-of-type(3n){
    margin-left: 3.333%;
}
.less_list ul li:nth-of-type(3n-1){
    margin-left: 3.333%;
}
.less_list ul li .content{
    width: 90%;
    height: 90%;
    margin: 0 auto;
    margin-top: 5%;
}
.less_list ul li .content .top{
    width: 100%;
    height: 160px;
}
.less_list ul li .content .top .tip{
    width: 46px;
    height: 24px;
    color: #fff;
    background: rgba(0,0,0,0.4);
    border-radius: 0 0 10px 0;
    font-size: 11px;
    text-align: center;
    line-height: 24px;
}
.less_list ul li .content .title{
    font-size: 13px;
    letter-spacing: 1px;
    width: 100%;
    margin-top: 5px;
    text-overflow: -o-ellipsis-lastline;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    height:38px;
}

.less_list ul li .content .information{
    margin-top: 12px;
    height: 18px;
}
.less_list ul li .content .information .text1{
    font-size: 11px;
    color: #969696;
}
.less_list ul li .content .information .text2{
    color: #38E1AB;
    margin-left: 10px;
    position: relative;
    top: 1px;
}
.less_list ul li .content .information img{
    width: 13px;
    margin-left: 20px;
    position: relative;
    top: 3px;
}
.less_list ul li .content .bottom{
    margin-top: 10px;
}
.less_list ul li .content .bottom .img1{
    width: 25px;
    height: 25px;
    border-radius: 25px;
}
.less_list ul li .content .bottom .name{
    margin-left: 5px;
    position: relative;
    bottom: 8px;
}
.less_list ul li .content .bottom .mian{
    float: right;
    color: #38DAA6;
    font-size: 15px;
    position: relative;
    top: 4px;
}
.less_list ul li .content .bottom .mi{
    float: right;
    color: #1B8CFF;
    font-size: 15px;
    position: relative;
    top: 4px;
}
.less_list ul li .content .bottom .money{
    float: right;
    color: #FF1B20;
    font-size: 15px;
    position: relative;
    top: 4px;
}

.less_list ul li .content .bottom .text{
    float: right;
    color: #FF1B20;
    font-size: 15px;
    position: relative;
    top: 4px;
}


.less_list .look_more{
    width: 120px;
    height: 35px;
    border: 1px solid #9e9a9a;
    margin: 0 auto;
    border-radius: 20px;
    text-align: center;
    line-height: 35px;
    font-size: 15px;
    color: #9e9a9a;
    margin-top: 25px;
}

.course-specialty {
    width: 80%;
    margin: 0 auto;
    background-color: #ffffff;
    padding: 25px 10%;
}

.course-specialty .category {
    display: flex;
    margin-top: 25px;
    flex-direction: column;
}

.course-specialty .category li {
    display: flex;
    margin: 10px 0;
}

.course-specialty .category li p {
    width: 20%;
    font-size: 18px;
    text-shadow: 1px 1px 1px #000000;
}

.course-specialty .content {
    width: 80%;
    display: grid;
    grid-template-columns: 25% 25% 25% 25%;
    justify-items: center;
}

.course-specialty .content .course-specialty-button {
    width: 150px;
    height: 35px;
    border: none;
    border-radius: 20px;
    padding: 0 25px
}