.course {
    /* width: 97%; */
    width: 1215px;
    /* width: 1660px; */
    margin: 0 auto;
    display: flex;
}

.course_tab {
    border-left: 1px solid #F2F3F3;
    padding-top: 15px;
    padding-left: 6px;
    margin-right: 26px;
}

.tab_list {
    width: 167px;
    height: 31px;
    display: flex;
    align-items: center;
    border-radius: 6px;
}

.tab_list img {
    width: 25px;
}

.tab_list span {
    font-family: PingFang SC;
    font-weight: 300;
    font-size: 12px;
    color: #40425E;
    margin-left: 20px;
}

.tab_info .active {
    background-color: #F2F3F7;
    font-family: PingFang SC;
    font-weight: 300;
    font-size: 14px;
    color: #25272C;
}

.course_info {
    margin-top: 15px;
}

.course_data {
    padding: 34px;
    border-radius: 16px;
    background-color: #F3F3F6;
    position: relative;
}

.course_user {
    position: absolute;
    right: 13%;
    bottom: 6%;
    display: flex;
    align-items: center;
}

.course_user img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    margin-right: 18px;
}

.course_user span {
    font-family: PingFang SC;
    font-weight: 400;
    font-size: 14px;
    color: #40425E;
}

.course_desc {
    display: flex;
}

.cover_info {
    width: 519px;
    margin-right: 43px;

}

.course_about {
    flex: 1;
}

.course_desc .cover {
    width: 100%;
    height: 320px;
    border-radius: 12px;
}

.course_title {
    font-family: PingFang SC;
    font-weight: 300;
    font-size: 14px;
    color: #479F68;
    margin-bottom: 29px;
}

.course_name {
    margin-bottom: 20px;
}

.course_name p {
    font-family: PingFang SC;
    font-weight: 500;
    font-size: 24px;
    color: #40425E;
}

.course_intro {
    font-family: PingFang SC;
    font-weight: 300;
    font-size: 14px;
    color: #40425E;
    margin-bottom: 20px;
    /* margin-bottom: 29px; */
}

.course_price {
    font-family: PingFang SC;
    font-weight: 600;
    font-size: 24px;
    color: #40425E;
    text-align: center;
}

.course_price span {
    font-size: 14px;
}

.course_vip_tag {
    font-family: PingFang SC;
    font-weight: 400;
    font-size: 14px;
    color: #d75771;
    margin-left: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 10px;
}

.course_vip_tag span {
    padding: 4px 8px;
    border-radius: 4px;
    color: #fff;
    font-weight: 400;
    background-color: #d75771;
    font-size: 18px;
    margin-right: 10px;
}

.brid_dest {
    font-family: PingFang SC;
    font-weight: 400;
    font-size: 14px;
    color: #d75771;
    margin-top: 20px;
}

.old_price {
    text-decoration: line-through;
}

.course_btn {
    border-radius: 45px;
    padding: 10px;
    background-color: #404260;
    font-family: PingFang SC;
    font-weight: 400;
    font-size: 24px;
    color: #FFFFFF;
    text-align: center;
    margin-top: 23px;
}

.btn_list {
    display: flex;
    align-items: center;
    margin-top: 13px;
}

.btn_list p {
    display: flex;
    align-items: center;
    margin-right: 20px;
}

.btn_list p img {
    width: 22px;
    margin-right: 8px;
}

.btn_list p span {
    font-family: PingFang SC;
    font-weight: 400;
    font-size: 14px;
    color: #40425E;
}

.recom {
    margin: 15px 0;
}

.recom_list {
    margin-bottom: 17px;
}

.recom_name {
    font-family: PingFang SC;
    font-weight: 600;
    font-size: 20px;
    color: #40425E;
    margin-bottom: 16px;
}

.recom_desc,
.recom_desc span {
    font-family: PingFang SC;
    font-weight: 400;
    font-size: 14px;
    color: #40425E;
    display: inline-block;
    width: 100%;
}

.chapter_name {
    text-align: center;
    margin: 44px 0;
    font-family: PingFang SC;
    font-weight: 600;
    font-size: 20px;
    color: #40425E;
}

.chapter ul {
    display: flex;
    flex-wrap: wrap;
}

.chapter ul li {
    width: 30%;
    margin-right: 4%;
    border-radius: 8px;
    border: 1px solid #E4E6EB;
    margin-bottom: 14px;
    padding-bottom: 38px;
    position: relative;
}

.chapter ul li:nth-child(3n) {
    margin-right: 0px;
}

.chapter_cover {
    width: 100%;
    /* height: 183px; */
    border-radius: 8px 8px 0 0;
    margin-bottom: 18px;
    /* padding-bottom: 50px; */
    /* object-fit: contain */
    display: block;
}

.chapter ul li p {
    margin-left: 17px;
}

.chapter_title {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chapter_title span {
    font-family: PingFang SC;
    font-weight: 500;
    font-size: 15px;
    color: #414243;
    margin-bottom: 20px;
}

.chapter_title .chapter_date {
    color: #db607c;
    margin-right: 17px;
    font-weight: 400;
}

.chapter_desc {
    margin-bottom: 30px;
    font-family: PingFang SC;
    font-weight: 500;
    font-size: 15px;
    color: #414243;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    /* 显示 3 行 */
    overflow: hidden;
    /* 超出部分隐藏 */
    white-space: normal;
    /* 自动换行 */
}

.chapter_info {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
    overflow: hidden;
    white-space: normal;
    font-family: PingFang SC;
    font-weight: 400;
    font-size: 12px;
    color: #707183;
}

.free_tag {
    position: absolute;
    right: 15px;
    bottom: 20px;
    background-color: rgb(194, 250, 87);
    font-family: PingFang SC;
    font-weight: 500;
    font-size: 12px;
    color: #414243;
    padding: 2px 4px;
    border-radius: 2px;
    padding-top: 10px;
}

.free_tag span {
    color: rgb(201, 98, 126);
}