body {
    background-color: #ffffff;
}
.video_preview {
    position: relative;
    width: 100%;
}

.r_preview {
    position: relative;
    min-height: 2rem;
    padding-top: 2rem;
}

video {
    /*width: 100%;
    height: 100%;*/
    object-fit: fill;
}

.audio_preview {
    display: flex;
    align-items: center;
    justify-items: center;
}

.audio_preview .to_back_link{
    display: flex;
    align-items: center;
    color: #333333;
    font-size: 0.8rem;
}

.r_preview .to_back_link {
    color: #333333;
}

audio {
    display: inline-block;
    width: 80%;
    margin: 2rem auto 0 auto;
}

.to_back_link {
    position: absolute;
    left: 0.05rem;
    top: 0;
    display: block;
    color: #ffffff;
    text-decoration: none;
}

.to_back_link i {
    display: block;
    font-size: 35px;
}

.resource_list {
    margin: 0.8rem 0.6rem;
    box-sizing: border-box;
}

.resource_title {
    display: flex;
    align-items: flex-start;
    padding-left: 0.6rem;
    font-size: 0.7rem;
    font-family: FZLanTingHei-R-GBK;
    font-weight: 400;
    color: #333333;
    line-height: 1.4rem;
}
.resource_title img {
    margin-top: 0.4rem;
}

.r_detail_ico {
    width: 0.6rem;
    margin-right: 0.1rem;
}

.view_num {
    display: flex;
    align-items: center;
    padding-left: 0.6rem;
    font-size: 0.6rem;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #333333;
}

.resource_item {
    margin-bottom: 0.4rem;
}

.type_head {
    display: flex;
    align-items: center;
    box-sizing: border-box;
    height: 2.08rem;
    padding: 0.8rem 0 0.8rem 0.6rem;
    background: #EAECF3;
    border-radius: 0.16rem;
    font-size: 0.6rem;
    font-family: FZLanTingHei-R-GBK;
    font-weight: 400;
    color: #333333;
}

.r_type_ico {
    width: 0.52rem;
    margin-right: 0.2rem;
}

.chevron_link {
    margin-left: 10.2rem;
    font-size: 0.8rem;
    color: #333333;
}

.chevron_link:hover {
    color: #333333;
}

.chapter_list li {
    padding-left: 1.4rem;
}

.chapter_name {
    margin-top: 0.54rem;
    font-size: 0.6rem;
    font-family: FZLanTingHei-R-GBK;
    font-weight: 400;
    color: #333333;
}

.chapter_item {
    padding: 0.6rem 0;
    border-bottom: 1px solid #EAECF3;
}

.chapter_item a {
    font-size: 0.52rem;
    font-family: FZLanTingHei-R-GBK;
    font-weight: 400;
    color: #74757C;
}

.chapter_item a.active {
    color: #B94343;
}

.relate_box {
    margin: 0.4rem 0.6rem;
}

.relate_box h5 {
    font-size: 0.65rem;
    font-family: FZLanTingHei-R-GBK;
    font-weight: 400;
    color: #333333;
}

.relate_item {
    margin-top: 0.4rem;
    border-bottom: 1px solid #E2E2E2;
}

.relate_r, .book_r {
    margin-bottom: 0.6rem;
}

.book_r {
    padding-left: 1.4rem;
    font-size: 0.5rem;
    font-family: FZLanTingHei-R-GBK;
    font-weight: 400;
    color: #74757C;
}

.relate_type_name {
    margin-right: 0.2rem;
    padding: 0.1rem 0.18rem;
    font-size: 0.5rem;
    font-family: FZLanTingHei-R-GBK;
    font-weight: 400;
    color: #74757C;
    border: 1px solid #E2E2E2;
    border-radius: 0.1rem;
}

.relate_link {
    font-size: 0.6rem;
    font-family: FZLanTingHei-R-GBK;
    font-weight: 400;
    color: #333333;
}

.relate_book_name {
    margin-right: 0.1rem;
}

.download_box {
    position: relative;
    padding-top: 1rem;
}

.download_box h5 {
    width: 90%;
    margin: 0 auto;
    font-size: 0.65rem;
    font-family: FZLanTingHei-R-GBK;
    font-weight: 400;
    color: #333333;
}

textarea {
    display: block;
    width: 90%;
    margin: 0 auto;
    font-size: 0.5rem;
    font-family: FZLanTingHei-R-GBK;
    font-weight: 400;
    color: #74757C;
}

.download_link {
    position: absolute;
    top: 0.8rem;
    right: 0.8rem;
    padding: 0.1rem 0.2rem;
    font-size: 0.6rem;
    font-family: FZLanTingHei-R-GBK;
    font-weight: 400;
    color: #ffffff;
    background-color: #D76464;
    border-radius: 0.2rem;
}