h5, p {
    margin: 0;
}

.course-brief, .course-learn {
    padding: 32px 0;
    background: #F5F5F5;
}
.course-brief-box {
    justify-content: space-between;
    align-items: flex-start;
    height: 360px;
}
.course-img {
    flex: 0 0 560px;
}
.course-img img {
    display: block;
    width: 100%;
}
.course-brief-info {
    flex: 1 1 auto;
    overflow: hidden;
    margin-left: 2%;
}
.course-name {
    height: 100px;
    overflow: hidden;
    font-size: 26px;
    color: #101010;
    line-height: 42px;
}
.course-brief-relate {
    justify-content: space-between;
    align-items: flex-start;
    margin-top: 30px;
    font-size: 18px;
    color: #4d4d4d;
    line-height: 1;
}
.course-brief-price dd {
    margin-top: 20px;
    font-size: 36px;
    font-weight: bold;
    color: #FF4E00;
}
.course-brief-rate span img {
    margin-left: 8px;
    width: 28px;
    height: 28px;
    vertical-align: middle;
}
.course-brief-chpur {
    margin-top: 36px;
}
.course-brief-chpur dl {
    margin: 0 20px;
    text-align: center;
}
.course-brief-chpur dl dt {
    margin-bottom: 18px;
    font-size: 24px;
    color: #101010;
}
.course-brief-info a {
    display: block;
    margin-top: 20px;
    width: 200px;
    height: 60px;
    line-height: 60px;
    font-size: 28px;
    color: #fff;
    text-align: center;
    background: #FF4E00;
    border-radius: 4px;
    opacity: 0.8;
}
/* course content */
.course-content {
    margin-bottom: 24px;
}
.course-content-left {
    margin-top: 60px;
}
.course-tab span {
    display: inline-block;
    width: 90px;
    height: 42px;
    line-height: 42px;
    text-align: center;
    font-size: 18px;
    color: #4d4d4d;
    background: #DADADA;
    cursor: pointer;
}
.course-tab .tab-active {
    border-top: 4px solid #10B35E;
    color: #10B35E;
    background: #fff;
}
.course-tab-content > div {
    display: none;
}
.course-content-img img {
    display: block;
    margin: 5% auto 0;
    width: 80%;
}
.course-content-directory {
    padding: 58px 0 0 0;
}
.directory-title {
    margin: 0 0 46px 0;
    padding-left: 60px;
    font-size: 16px;
    color: #A2A2A2;
}
.chapter-item {
    margin-bottom: 24px;
    font-size: 18px;
    color: #393939;
}
.cl-name-box {
    position: relative;
    margin-left: 60px;
    margin-bottom: 22px;
}
.cl-name {
    line-height: 42px;
}
.cl-arrow {
    position: absolute;
    bottom: 4px;
    right: 8px;
}
.cl-arrow img {
    width: 20px;
    height: 12px;
}
.cl-ct-list {
    display: none;
    padding: 30px 0 20px 100px;
    line-height: 42px;
    background: #FBFBFB;
}
.ct-item p {
    margin-bottom: 10px;
    padding-left: 48px;
    background: url(../images/course/play-icon.png) no-repeat left center;
}
.ct-item span {
    padding-left: 48px;
    color: #ADADAD;
    line-height: 1;
}
.chapter-item:hover {
    cursor: pointer;
}
.ct-item:hover p {
    color: #2FAACE;
    background: url(../images/course/play-icon-going.png) no-repeat left center;
}
.ct-item:hover span {
    color: #2FAACE;
}
.ct-item-active p {
    color: #2FAACE;
    background: url(../images/course/play-icon-going.png) no-repeat left center;
}
.ct-item-active span {
    color: #2FAACE;
}

.course-teacher {
    padding-bottom: 24px;
    border: 1px solid #EDEDED;
}
.course-teacher > p {
    padding: 36px 36px 0 36px;
    font-size: 18px;
    line-height: 42px;
}
.course-teacher-avatar {
    display: flex;
    justify-content: flex-start;
    align-items: flex-end;
    margin-top: -60px;
    padding-left: 18px;
    color: #4d4d4d;
}
.course-teacher-avatar img {
    margin-right: 11%;
    width: 46%;
    height: 46%;
    border-radius: 50%;
}
.course-teacher-avatar dt {
    padding-left: 20px;
    font-size: 18px;
    line-height: 1;
    border-left: 4px solid #10B35E;
}
.course-teacher-avatar dd {
    padding-bottom: 20px;
    font-size: 36px;
    font-weight: bold;
}

.branch-course {
    margin-top: 30px;
    padding: 0 10px;
    border: 1px solid #ededed;
}
.branch-course .branch-module-title {
    padding: 20px 0 15px;
}
.branch-course-item {
    justify-content: flex-start;
    align-items: flex-start;
    padding: 20px 0;
    height: 120px;
    border-top: 1px solid #E4E4E4;
}
.branch-course-item:last-of-type {
    border-bottom: none;
}
.bcitem-img {
    display: block;
    width: 190px;
    height: 120px;
    flex: 0 0 190px;
}
.bcitem-img img {
    display: block;
    width: 190px;
    height: 100%;
}
.bcitem-content {
    margin-left: 10px;
    flex: 1 1 auto;
    overflow: hidden;
}
.bcitem-name {
    display: block;
    margin-bottom: 24px;
    font-size: 16px;
    line-height: 1;
}
.bcitem-teacher {
    margin-bottom: 26px;
    font-size: 14px;
    color: #7B7B7B;
}
.bcitem-num-price {
    justify-content: space-between;
}
.bcitem-price {
    font-size: 18px;
    color: #FB0000;
}
.bcitem-num {
    font-size: 14px;
    color: #7B7B7B;
    text-indent: 24px;
    background: url(../images/branch/cart-icon.png) no-repeat left center;
}

/* course learn */
.course-learn-cnt {
    justify-content: space-between;
    align-items: flex-start;
}
.course-video {
    flex: 0 0 900px;
    width: 900px;
    height: 616px;
    background: #4d4d4d;
}
.course-directory-cnt {
    flex: 1 1 auto;
    overflow: hidden;
    margin-left: 3%;
}
.course-learn-box .course-content-right {
    margin-top: 70px;
}
.course-directory-cnt h5 {
    height: 116px;
}
.course-directory-list {
    margin-top: 20px;
    height: 480px;
    overflow: auto;
}
.course-chapter-total {
    font-size: 16px;
}
.course-chapter {
    margin-top: 18px;
}
.course-chapter-item {
    margin-bottom: 16px;
}
.chapter-name-box {
    position: relative;
}
.chapter-name {
    width: 100%;
    font-size: 18px;
    color: #707070;
    line-height: 1.6;
}
.chapter-arrow {
    position: absolute;
    right: 6px;
    bottom: 4px;
    padding-left: 6px;
    background: #f5f5f5;
}
.chapter-arrow img {
    width: 20px;
    height: 12px;
}

.chapter-lt-list {
    display: none;
    margin-top: 14px;
}
.chapter-lt-item {
    margin-bottom: 10px;
    font-size: 14px;
}
.chapter-lt-item p {
    padding-left: 50px;
    background: url(../images/course/play-icon.png) no-repeat left center;
}
.chapter-lt-item span {
    padding-left: 50px;
    color: #ADADAD;
}
.chapter-lt-item:hover {
    cursor: pointer;
}
.chapter-lt-item:hover p {
    color: #10B35E;
    background: url(../images/course/play-icon-going.png) no-repeat left top;
}
.chapter-lt-item:hover span {
    color: #2FAACE;
}
.chapter-lt-learning p {
    color: #10B35E;
    background: url(../images/course/play-icon-going.png) no-repeat left top;
}
.chapter-lt-learning span {
    color: #2FAACE;
}