body{
    background-color: #f7f8f9;
}

.video_content{
    width: 100%;
    height: 720px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    overflow: hidden;
}

.video_content .video_content_bg{
    width: 100%;
    height: 100%;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    position: absolute;
    left: 0;
    top: 0;
}

.video_content .video_main{
    width: 1200px;
    height: 675px;
    border-radius: 16px 16px 0 0;
    overflow: hidden;
}

.video_content .video_main #video{
    width: 100%;
    height: 100%;
}

.video_detail_container{
    display: flex;
    width: 1200px;
    margin: 0 auto 120px;
}

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

.video_tools{
    width: calc(100% - 840px);
    flex: 1;
    display: flex;
    flex-direction: column;
    padding-top: 32px;
    padding-left: 40px;
    box-sizing: border-box;
}

.video_info{
    width: 100%;
    background-color: #fff;
    border-radius: 8px;
    padding: 24px;
    box-sizing: border-box;
    margin: 32px 0;
    display: flex;
    flex-direction: column;
}

.video_info .title{
    display: flex;
    align-items: flex-start;
}

.video_info .title span{
    width: 34px;
    height: 24px;
    display: flex;
    text-align: center;
    line-height: 24px;
    color: #fff;
    font-weight: bold;
    margin-right: 8px;
    border-radius: 4px;
    background-color: #17234b;
    justify-content: center;
    margin: 5px 8px 5px 0;
}

.video_info .title h1{
    color: #141414;
    line-height: 34px;
    font-size: 24px;
    width: calc(100% - 96px);
    font-weight: bold;
}

.video_info .other{
    display: flex;
    margin: 16px 0;
}

.video_info .other span{
    font-size: 14px;
    margin-right: 16px;
    color: #7c828e;
}

.video_info .other span:last-child{
    margin-right: 0;
}

.video_info .desc{
    width: 100%;
    color: #333;
    font-size: 14px;
    border-top: 1px solid rgba(0,0,0,.08);
    padding-top: 16px;
    line-height: 24px;
}

.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 .video_tips{
    font-size: 12px;
    color: rgba(0,0,0,.6);
}

.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;
}


.video_detail_c .contact_user_c{
    display: flex;
}

.video_detail_c .contact_user_c > a{
    border-radius: 4px;
    background-color: #17234B;
    color: #fff;
    font-size: 14px;
    width: 96px;
    height: 36px;
    line-height: 36px;
    text-align: center;
}

.video_detail_c .contact_user_c > p{
    color: #333;
    font-size: 12px;
    line-height: 20px;
}

.video_info .other p{
    color: #17234B;
    font-size: 14px;
}

.video_info .other p span{
    font-size: 16px;
    color: #17234B;
}