main {
    background: #F6F6F6;
    padding-bottom: 31px;
}

#content_head {
    height: 55px;
    width: 1200px;
    margin: 0 auto;
    font-size: 14px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    color: rgba(153, 153, 153, 1);
    line-height: 55px;
}

#content_head a {
    font-size: 14px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    color: rgba(153, 153, 153, 1);

}

#con_video {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    padding: 30px 25px;
    box-sizing: border-box;
    background: #fff;
}

.video_left {
    overflow: hidden;
    width: 308px;
    height: 252px;
    background: rgba(132, 84, 204, 0.04);
    margin-right: 48px;
}

.video_left img {
    width: 194px;
    height: 208px;
    vertical-align: middle;
    margin-left: 40px;
}

.video_right {
    width: calc(100% - 242px);
}

.vedio_r_bigtitle {
    font-size: 24px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    color: rgba(34, 34, 34, 1);
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

.classTips {
    display: flex;
    align-items: center;
    margin-top: 20px;
    margin-bottom: 30px;
}

.classTips li {
    display: inline-block;
    padding: 6px 13px;
    border: 1px solid rgba(132, 84, 204, 1);
    font-size: 14px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    border-radius: 13px;
    color: rgba(132, 84, 204, 1);
    margin-right: 24px;
}

.time_long {
    font-size: 16px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    color: rgba(136, 136, 136, 1);
    line-height: 30px;
}

.course-btns {
    display: block;
    margin-top: 25px;
    width: 146px;
    height: 44px;
    background: linear-gradient(17deg, rgba(253, 85, 85, 1), rgba(251, 113, 76, 1));
    border-radius: 4px;
    font-size: 16px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    color: rgba(255, 255, 255, 1);
    text-align: center;
    line-height: 44px;
}

.MainBottom {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    margin-top: 18px;
}

#classJieshao {
    width: 953px;
    background-color: #fff;
}

.class_jieshao_head {
    width: 100%;
    height: 69px;
    padding-left: 16px;
    box-sizing: border-box;
    border-bottom: 1px solid #F6F6F6;
}

.class_jieshao_head ul {
    display: flex;
}

.class_jieshao_head ul li {
    border-bottom: 2px solid transparent;
    font-size: 16px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    color: rgba(34, 34, 34, 1);
    margin-right: 35px;
    height: 69px;
    line-height: 69px;
    padding: 0px 16px;
    cursor: pointer;
}

.class_jieshao_head ul li.on {
    color: #8454CC;
    border-color: #8454CC;
}

.intr-wrap {
    padding: 35px;
    width: 100%;
    box-sizing: border-box;
}

.intr-wrap /deep/ img {
    max-width: 100%;
}


/* 授课老师 */

.keti_teacher_box {
    padding: 29px;
    box-sizing: border-box;
    width: 100%;
}

.keti_t_item {
    display: flex;
    align-items: center;
    margin-bottom: 30px;
}

.image {
    width: 135px;
    height: 154px;
    background: rgba(229, 229, 229, 1);
    border-radius: 10px;
    margin-right: 25px;
}

.image img {
    width: 100%;
    height: 100%;
}

.keti_t_item .keti_t_intro {
    width: calc(100% - 160px);
}

.keti_t_item .keti_t_intro>h6 {
    font-size: 16px;
    font-family: Microsoft YaHei;
    font-weight: bold;
    color: rgba(34, 34, 34, 1);
    margin-bottom: 15px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 100%;
}

.keti_t_item .keti_t_intro>.desc {
    display: -webkit-box;
    overflow: hidden;
    text-overflow: ellipsis;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
    line-height: 26px;
    max-height: 104px;
    font-size: 14px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    color: rgba(34, 34, 34, 1);
}

/* 课程评价 */
.liuyan_user_big {
    width: 100%;
    padding: 27px 30px;
    box-sizing: border-box;
}

.liuyan_user_big ul li {
    display: flex;
    width: 100%;
    margin-bottom: 30px;
}

.imgUser {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    overflow: hidden;
    margin-right: 13px;
}

.imgUser img {
    width: 100%;
}

.user_liuyan {
    width: calc(100% - 55px);
}

.user_liuyan p {
    font-size: 14px;
    font-family: Microsoft YaHei;
    font-weight: bold;
    color: rgba(34, 34, 34, 1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.user_liuyan p b {
    font-size: 14px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    color: rgba(170, 170, 170, 1);
}

.user_liuyan>span {
    font-size: 14px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    color: rgba(68, 68, 68, 1);
    line-height: 24px;
    display: -webkit-box;
    overflow: hidden;
    text-overflow: ellipsis;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
    max-height: 72px;
    margin-top: 5px;
}

/* 右边二维码 */
.rightQRBox {
    width: 220px;
    height: 252px;
    background: rgba(255, 255, 255, 1);
    padding: 17px 20px;
    box-sizing: border-box;
}

.rightQRBox p {
    font-size: 14px;
    font-family: Microsoft YaHei;
    font-weight: 400;
    color: rgba(68, 68, 68, 1);
    margin-bottom: 15px;
    text-align: center;
}

.rightQRBox img {
    width: 179px;
    height: 180px;
}