body{
    background-color: #f7f8f9;
}

.video_tools .tit{
    font-size: 20px;
    font-weight: bold;
    color: #17234b;
    position: relative;
    padding-left: 12px;
    margin-bottom: 24px;
}

.video_tools .tit::before{
    content: '';
    width: 3px;
    height: 18px;
    border-radius: 20px;
    background: #17234B;
    position: absolute;
    top:6px;
    left: 0px;
}

.video_tools .zpb_list{
    display: flex;
    flex-direction: column;
}

.video_tools .zpb_list .item{
    width: 320px;
    height: 372px;
    position: relative;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    display: flex;
    align-items:center;
    justify-content: flex-end;
    flex-direction: column;
    margin-bottom: 24px;
}

.video_tools .zpb_list .item:last-child{
    margin-bottom: 0;
}

.video_tools .zpb_list .item:nth-child(1){
    background-image: url(../imgs/index/course_index1.png);
}

.video_tools .zpb_list .item:nth-child(2){
    background-image: url(../imgs/index/course_index2.png);
}

.video_tools .zpb_list .item:nth-child(3){
    background-image: url(../imgs/index/course_index3.png);
}

.video_tools .zpb_list .item:nth-child(4){
    background-image: url(../imgs/index/course_index4.png);
}

.video_tools .zpb_list .item h2{
    font-size: 20px;
    color: #fff;
    margin-bottom: 8px;
}

.video_tools .zpb_list .item p{
    font-size: 12px;
    color: #fff;
}

.video_tools .zpb_list .item > a{
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    background-color: #dcbc7d;
    width: 64%;
    height: 44px;
    margin-bottom: 32px;
    font-size: 16px;
    margin-top: 16px;
}

.video_tools .zpb_list .item > a img{
    width: 24px;
    height: 24px;
    margin-right: 8px;
}

.article_container{
    margin:40px auto 0;
    display: flex;
    flex-direction: column;
    width: 1200px;
}

.article_main{
    display: flex;
    align-items: flex-start;
    margin-top: 40px;
    justify-content: space-between;
    margin-bottom: 120px;
} 

.article_main_c{
    width: 840px;
    background-color: #fff;
    border-radius: 8px;
    box-sizing: border-box;
    padding: 40px 40px 0 40px;
    display: flex;
    flex-direction: column;
    margin-bottom: 32px;
}

.article_main_c .article_head{
    display: flex;
    flex-direction: column;
    border-bottom: 1px solid rgba(0,0,0,.08);
    padding-bottom: 12px;
}

.article_head > h1{
    font-size: 28px;
    font-weight: bold;
    color: #333333;
    line-height: 24px;
}

.article_head .other{
    display: flex;
    align-items: center;
    margin-top: 12px;
}

.article_head .other > span{
    font-size: 12px;
    font-weight: 500;
    color: #999999;
    line-height: 36px;
}

.article_head .other .ctime{
    display: flex;
    align-items: center;
    margin-right: 32px;
}

.article_head .other .ctime span{
    color: #999999;
    font-size: 14px;
    margin-right: 3px;
    line-height: 20px;
    display: inline-block;
}

.article_head .other .ctime p{
    font-size: 12px;
    color: #999999;
    line-height: 20px;
}

.article_share{
    height: 120px;
    border-top: 1px solid rgba(0,0,0,.08);
    display: flex;
    align-items: center;
    justify-content: center;
}

.article_share a{
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid #17234B;
    border-radius: 50%;
    box-sizing: border-box;
    margin-right: 48px;
    color: #17234B;
    font-size: 22px;
    transition: .2s all;
}

.article_share a:last-child{
    margin-right: 0;
}

.article_share a:hover{
    background-color: #17234B;
    color: #fff;
}

.article_content{
    margin: 40px 0;
}

.video_about{
    display: flex;
    flex-direction: column;
    background-color: #fff;
    box-sizing: border-box;
    padding: 24px 24px 8px 24px;
    border-radius: 8px;
    margin: 32px 0;
}

.video_about .tit{
    display: flex;
    justify-content: space-between;
    margin-bottom: 32px;
}

.video_about .tit h2{
    font-size: 20px;
    font-weight: bold;
    color: #17234b;
    position: relative;
}

.video_about .tit h2::after{
    content: '';
    width: 30px;
    height: 3px;
    border-radius: 20px;
    background: linear-gradient(90deg, #17234B 0%, #899DE0 100%);
    position: absolute;
    bottom: -8px;
    left: 0;
}

.video_about_list .item{
    display: flex;
    flex-direction: column;
    margin-bottom: 24px;
    transition: all .2s;
    border-radius: 8px;
}

.video_about_list .item:hover{
    background-color: #fff;
    box-shadow: rgba(28, 28, 30, 0.08) 0px 0px 2px 0px, rgba(28, 28, 30, 0.08) 0px 8px 16px 0px;
}

.video_about_list .item:hover .video_top_c img{
    transform: scale(1.1);
}

.video_about_list .item .video_top_c{
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    border-radius: 8px;
    overflow: hidden;
}

.video_about_list .item .video_top_c::before{
    content: '';
    width: 100%;
    height: 120px;
    position: absolute;
    left: 0;
    bottom: 0;
    z-index: 1;
    background-image: linear-gradient(rgba(0,0,0,0), rgba(0,0,0,.6));
}

.video_about_list .item .video_top_c .time{
    font-size: 12px;
    color: #fff;
    text-shadow: 0 0 6px rgba(0,0,0,.16);
    position: absolute;
    bottom: 12px;
    right: 12px;
    z-index: 10;
}

.video_about_list .item .video_top_c .res{
    font-size: 12px;
    color: #fff;
    text-shadow: 0 0 6px rgba(0,0,0,.16);
    position: absolute;
    left: 12px;
    top: 12px;
    z-index: 10;
}

.video_about_list .item .video_top_c .icon-bofang{
    color: #fff;
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    width: 36px;
    height: 36px;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    z-index: 10;
}

.video_about_list .item .video_top_c img{
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    object-fit: cover;
    transition: all .25s;
}

.video_about_list .item .video_name{
    font-size: 16px;
    color: #333;
    margin: 12px 0;
}

.video_about_list .item .ctime{
    display: flex;
    align-items: center;
    margin-right: 32px;
}

.video_about_list .item .ctime span{
    color: #999999;
    font-size: 14px;
    margin-right: 3px;
    line-height: 20px;
    display: inline-block;
}

.video_about_list .item .ctime p{
    font-size: 12px;
    color: #999999;
    line-height: 20px;
}

.article_mains{
    display: flex;
    flex-direction: column;
    width: 840px;
}



/*-------*/

.ask_main{
    display: flex;
    align-items: flex-start;
    margin-top: 40px;
    justify-content: space-between;
    margin-bottom: 80px;
}

.ask_main_c{
    display: flex;
    flex-direction: column;
    width: 840px;
}

.ask_main_c .article_head{
    width: 840px;
    background-color: #fff;
    border-radius: 8px;
    box-sizing: border-box;
    padding: 24px 40px 16px 40px;
    display: flex;
    flex-direction: column;
}

.ask_main_c .article_head .ask_tit{
    display: flex;
    align-items: center;
}

.ask_main_c .article_head .ask_tit img{
    width: 34px;
    height: 34px;
    margin-right: 8px;
}

.ask_main_c .article_head .ask_tit h1{
    font-size: 22px;
    font-weight: bold;
    color:#333;
}

.ask_main .article_head .other{
    margin-top: 4px;
}

.ask_main .article_answer{
    display: flex;
    flex-direction: column;
}

.article_answer .answer_item{
    display: flex;
    flex-direction: column;
    background-color: #fff;
    box-sizing: border-box;
    padding: 24px 40px;
    border-radius: 8px;
    margin-top: 24px;
}

.article_answer .answer_item .answer_head{
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.article_answer .answer_item .answer_head .answer_tit{
    display: flex;
    align-items: center;
}

.article_answer .answer_item .answer_head .answer_tit img{
    width: 30px;
    height: 30px;
    margin-right: 8px;
}

.article_answer .answer_item .answer_head .answer_tit p{
    color: rgb(44,202,111);
    font-size: 20px;
    font-weight: bold;
}

.article_answer .answer_item .answer_head .ctime{
    display: flex;
    align-items: center;
}

.article_answer .answer_item .answer_head .ctime span{
    color: #999999;
    font-size: 14px;
    margin-right: 3px;
    line-height: 20px;
    display: inline-block;
}

.article_answer .answer_item .answer_head .ctime p{
    font-size: 12px;
    color: #999999;
    line-height: 20px;
}

.article_answer .answer_item .answer_body{
    margin: 24px 0 8px 0;
}


.ask_about_list{
    display: flex;
    flex-direction: column;
}

.ask_about_list .item{
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 50px;
    border-bottom: 1px solid rgba(0,0,0,.08);
    box-sizing: border-box;
}

.ask_about_list .item:last-child{
    border-bottom: none;
}

.ask_about_list .item .ctime{
    display: flex;
    align-items: center;
}

.ask_about_list .item .ctime span{
    color: #999999;
    font-size: 14px;
    margin-right: 3px;
    line-height: 20px;
    display: inline-block;
}

.ask_about_list .item .ctime p{
    font-size: 12px;
    color: #999999;
    line-height: 20px;
}

.ask_about_list .item .item_t{
    display: flex;
    align-items: center;
}

.ask_about_list .item .item_t img{
    width: 24px;
    height: 24px;
    margin-right: 6px;
}

.ask_about_list .item .item_t h3{
    font-size: 16px;
    font-weight: bold;
    color: #333;
    width: 500px;
}

.article_content p{
    font-size: 16px;
    line-height: 30px;
}

.article_content img{
    width: 100%;
    margin: 16px 0;
}

.answer_body p{
    font-size: 16px;
    line-height: 30px;
}

.article_answer .adoptc_pic{
    position: absolute;
    left: -46px;
    width: 111px;
    height: 52px;
}

.adoptc_answer.adoptc_answer .answer_head{
    height: 52px;
    position: relative;
}

.adoptc_answer.adoptc_answer .ctime{
    margin-left: auto;
}