.down_container{
    background-image: none;
    flex-direction: column;
}
.public_nav_c{
    background-color: #141626;
}
.down_container{
    height: auto !important;
}
.course_top{
    margin-top: 88px;
    display: flex;
    flex-direction: column;
    padding: 72px 0;
    box-sizing: border-box;
    align-items: center;
}
.course_top > h2{
    font-size: 34px;
    font-weight: bold;
    color: #141626;
    text-align: center;
}
.course_top > p{
    margin-top: 8px;
    color: #5c5c5c;
    margin-bottom: 16px;
    text-align: center;
}
.course_list{
    display: flex;
    flex-wrap: wrap;
    width: 1200px;
    margin: 0 auto 24px;
    justify-content: space-between;
}
.course_list .course_item{
    display: flex;
    flex-direction: column;
    width: 584px;
    border-radius: 8px;
    border: 1px solid #141626;
    box-sizing: border-box;
    height: 200px;
    margin-bottom: 32px;
}
.course_list .course_item .course_tit{
    height: 72px;
    border-bottom: 1px solid #141626;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    padding: 0 24px;
}
.course_list .course_item .course_tit > p{
    font-size: 22px;
    color: #141626;
    font-weight: 700;
}

.course_list .course_item .course_tit > img{
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-sizing: border-box;
    margin-left: auto;
}

.course_list .course_item .course_c{
    box-sizing: border-box;
    padding: 16px 24px;
}

.course_list .course_item .course_c > a{
    display: flex;
    align-items: center;
    color: #4c78c7;
    font-size: 16px;
    text-decoration: underline;
}


.course_list .course_item .course_c > a span{
    color: #4c78c7;
}
.course_list .course_item .sup_list{
    display: flex;
    margin-top: 4px;
    flex-direction: column;
}
.course_list .course_item .sup_list .sup_item{
    display: flex;
    align-items: center;
    color: #141626;
    font-size: 16px;
    margin-top: 10px;
}
.course_list .course_item .sup_list .sup_item span{
    color: #07a35a;
    margin-right: 8px;
}

.course_bottom_tips{
    color: #666;
    margin: 16px 0 86px 0;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
}

.course_bottom_tips span{
    margin-right: 3px;
}




@media screen and (max-width:1366px){
    .course_list{
        width: 800px;
    }

    .course_list .course_item{
        width: 386px;
    }

    .course_top > h2{
        font-size: 28px;
    }
}

.mobile .course_top{
    padding: 32px;
}

.mobile .public_select_c{
    width: 100%;
}

.mobile .course_list{
    width: 100%;
    padding: 0 32px;
    box-sizing: border-box;
}

.mobile .course_list .course_item{
    width: 100%;
}