/* 公共样式开始 */
body {
  background: #f2f3f5;
}
.w1200 {
  width: 1200px;
  margin: 0 auto;
}
.clearbox::after {
  content: '';
  display: block;
  height: 0;
  line-height: 0;
  clear: both;
}
.commont-title {
  font-size: 19px;
  font-weight: 600;
  color: #414244;
  line-height: 26px;
  letter-spacing: 1px;
  text-align: center;
}
.commont-subtitle {
  font-size: 15px;
  font-weight: 400;
  color: #666666;
  line-height: 21px;
  letter-spacing: 1px;
  margin-top: 6px;
  text-align: center;
}
video:focus {
  outline: -webkit-focus-ring-color auto 0px;
}
/* 公共样式结束 */

.content {
  width: 1200px;
  margin: 20px auto;
  background: #fff;
}

/* banner开始 */
.banner {
  width: 100%;
  height: 580px;
}
.banner .banner_box{
  margin-top: 275px;
  transform: translateY(-50%);
}
.banner .banner_box .h3{
  font-size: 30px;
  color: #fff;
  text-align: center;
}
.banner .banner_box .p1{
  font-size: 48px;
  color: #fff;
  margin-top: 20px;
  text-align: center;
}
.banner1 {
  background: url("../images/video/banner5.png")/*/templates/default/images/video/banner5.png*/ no-repeat center/cover;
}
.banner2 {
  background: url("../images/video/banner6.png")/*/templates/default/images/video/banner6.png*/ no-repeat center/cover;
}
.banner2 .banner_box .h3{
  text-align: left;
  font-size: 40px;
}
.banner2 .banner_box .p1{
  text-align: left;
  font-size: 52px;
}
.banner3 {
  background: url("../images/video/banner7.png")/*/templates/default/images/video/banner7.png*/ no-repeat center/cover;
}
.swiper-container-horizontal>.swiper-pagination-bullets, .swiper-pagination-custom, .swiper-pagination-fraction {
  bottom: 20px;
}
.swiper-pagination-bullet {
  width: 9px;
  height: 9px;
}
.swiper-pagination-bullet-active {
  width: 24px;
}
/* banner结束 */

/* 搜索栏开始 */
.search_box {
  width: 1200px;
  margin: auto;
  padding: 33px 20px;
  box-sizing: border-box;
  background: #fff;
}
.search_box .search_input {
  position: relative;
}
.search_box .search_input input {
  width: 280px;
  height: 38px; 
  background: #F0F0F0;
  border: none;
  outline: none;
  box-sizing: border-box;
  padding-left: 16px;
  border-radius: 2px;
}
.search_box .search_input .search_img {
  position: absolute;
  top: 0;
  right: 0;
  width: 38px;
  height: 38px;
  text-align: center;
  line-height: 38px;
  cursor: pointer;
}
.search_box .search_input .search_img img {
  vertical-align: middle;
}
.search_box .tag_box {
  margin-left: 25px;
}
.search_box .tag_box .tag {
  display: block;
  height: 28px;
  line-height: 28px;
  padding: 0px 10px;
  background: #D7E4FF;
  border-radius: 2px;
  color: #4C86FF;
  font-size: 14px;
  margin: 5px;
}
/* 搜索栏结束 */

/* 精品课程开始 */
.boutique {
  width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  box-sizing: border-box;
  background: #fff;
}
.boutique .tite_box .title .text {
    font-size: 20px;
    color: #414244;
    /* font-weight: 600; */
    line-height: 20px;
    vertical-align: middle;
}
.boutique .tite_box .title .icon {
  vertical-align: middle;
  width: 48px;
  height: 20px;
  background: url("../images/hot.png")/*/templates/default/images/hot.png*/ no-repeat;
}
.boutique .tite_box .more {
  font-size: 14px;
  color: #414244;
  line-height: 22px;
}
.boutique .tite_box .more .icon {
  display: block;
  width: 5px;
  height: 5px;
  margin: 0;
  padding: 0;
  margin-left: 2px;
  margin-top: 7px;
  background: none;
  float: right;
  border-top: solid 1.5px #414244;
  border-right: solid 1.5px #414244;
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  transform: rotate(45deg);
}
.boutique .item_box {
  display: -webkit-flex;
  display: -moz-flex;
  display: -ms-flex;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0 30px;
}
.boutique .item_box .item {
  width: 370px;
  height: 180px;
  border-radius: 6px;
  overflow: hidden;
}
.boutique .item_box .item img {
  width: 100%;
  height: 100%;
}
/* 精品课程结束 */

/* 视频列表开始 */
.video_list {
  width: 1200px;
  margin: auto;
  padding: 0 20px;
  box-sizing: border-box;
  background: #fff;
}
.video_list .classification .title_box {
  padding-bottom: 12px;
}
.video_list .classification .title_box .class_title .text{
  font-size: 20px;
    color: #414244;
    /* font-weight: 600; */
    line-height: 20px;
    vertical-align: middle;
}
.video_list .classification .title_box .class_title .icon {
  vertical-align: middle;
  width: 48px;
  height: 20px;
  background: url("../images/hot.png")/*/templates/default/images/hot.png*/ no-repeat;
}
.video_list .classification .title_box .sort_title li{
  margin-left: 30px;
  font-size: 15px;
  color: #414244;
  line-height: 20px;
  cursor: pointer;
}
.video_list .classification .title_box .sort_title li.active {
  font-weight: 600;
  color: #414244;
  position: relative;
}
.video_list .classification .title_box .sort_title li.active::after {
  content: '';
  display: block;
  position: absolute;
  left: 50%;
  top: 100%;
  width: 24px;
  height: 3px;
  background: #6979FF;
  border-radius: 2px;
  -webkit-transform: translate(-50%, 8px);
  -moz-transform: translate(-50%, 8px);
  -ms-transform: translate(-50%, 8px);
  transform: translate(-50%, 8px);
}
.video_list .classification .title_box .more {
  font-size: 14px;
  color: #414244;
  line-height: 22px;
}
.video_list .classification .title_box .more .icon {
  display: block;
  width: 5px;
  height: 5px;
  margin: 0;
  padding: 0;
  margin-left: 2px;
  margin-top: 7px;
  background: none;
  float: right;
  border-top: solid 1.5px #414244;
  border-right: solid 1.5px #414244;
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  transform: rotate(45deg);
}
.video_list .classification .list_box {
  padding: 12px 0 12px;
}
.video_list .classification .list_box .item_box {
  display: none;
}
.video_list .classification .list_box .item_box.active {
  display: block;
}
.video_list .classification .list_box .item {
  width: 272px;
  background: #FFFFFF;
  box-shadow: 0px 0px 10px 1px rgba(0, 0, 0, 0.1);
  border-radius: 6px;
  margin-right: 24px;
  overflow: hidden;
  margin-bottom: 15px;
  cursor: pointer;
}
.video_list .classification .list_box .item:nth-child(4n) {
  margin-right: 0px;
}
.video_list .classification .list_box .item .img_box{
  width: 272px;
  height: 135px;
}
.video_list .classification .list_box .item .img_box img {
  width: 100%;
  height: 100%;
  vertical-align: middle;
}
.video_list .classification .list_box .item .text_box {
  padding: 10px 15px;
  background: #fff;
}
.video_list .classification .list_box .item .text_box .title {
  font-size: 14px;
  color: #333333;
  line-height: 20px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.video_list .classification .list_box .item .text_box .information {
  margin-top: 10px;
}
.video_list .classification .list_box .item .text_box .information .label {
  color: #FF3E39;
  font-size: 13px;
  line-height: 20px;
}
.video_list .classification .list_box .item .text_box .information .lockdoc {
  font-size: 13px;
  color: #999999;
  line-height: 20px;
}
/* 视频列表结束 */

/* 学院风采开始 */
.article-box {
  width: 1200px;
  margin: 30px auto 8px;
  padding: 0 20px 60px;
  box-sizing: border-box;
  background: #fff;
}
.article-box .article-content {
  margin-top: 20px;
}
.article-box .article-content .article-item {
  display: block;
  width: 272px;
  height: 126px;
  box-shadow: 0px 2px 9px 0px rgba(0, 0, 0, 0.07);
  border-radius: 6px;
  box-sizing: border-box;
  padding: 16px 40px 0 16px;
  position: relative;
  overflow: hidden;
  margin-right: 24px;
  margin-bottom: 20px;
}
.article-box .article-content .article-item:nth-child(2n-1) {
  background: #EEF8FF;
}
.article-box .article-content .article-item:nth-child(2n) {
  background: #FEFDF9;
}
.article-box .article-content .article-item:nth-child(4n) {
  margin-right: 0;
}
.article-box .article-content .article-item .iocn {
  position: absolute;
  top: 0;
  right: 0;
  width: 20px;
  height: 20px;
  background: url("../images/flame.png")/*/templates/default/images/flame.png*/ no-repeat center/cover;
}
.article-box .article-content .article-item .title {
  font-size: 15px;
  font-weight: bold;
  color: #414244;
  line-height: 21px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.article-box .article-content .article-item .descr{
  font-size: 12px;
  font-weight: 500;
  color: #878B8A;
  line-height: 18px;
  margin-top: 6px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
}
.article-box .article-content .article-item .tag {
  margin-top: 15px;
}
.article-box .article-content .article-item .tag span {
  font-size: 12px;
  font-weight: 500;
  line-height: 12px;
  padding: 4px 6px;
  border-radius: 2px;
}
.article-box .article-content .article-item:nth-child(2n-1) .tag span{
  background: #D9F0FF;
  color: #6FA0FF;
}
.article-box .article-content .article-item:nth-child(2n) .tag span{
  background: #FFEFD9;
  color: #A47128;
}
/* 学院风采结束 */

/* 优质师资体系开始 */
.lecturer-box {
  width: 1200px;
  margin: 8px auto;
  padding: 0 20px 80px;
  box-sizing: border-box;
  background: #fff;
}
.lecturer-box .lecturer-content {
  margin-top: 40px;
}
.lecturer-box .lecturer-content .lecturer-item{
  width: 25%;
  box-sizing: border-box;
  padding: 0 24px;
  text-align: center;
  margin-bottom: 35px;
}
.lecturer-box .lecturer-content .lecturer-item .portrait {
  width: 80px;
  height: 80px;
  margin: auto;
  border-radius: 50%;
  overflow: hidden;
}
.lecturer-box .lecturer-content .lecturer-item .name {
  font-size: 16px;
  font-weight: 600;
  color: #000000;
  line-height: 22px;
  margin-top: 18px;
}
.lecturer-box .lecturer-content .lecturer-item .descr {
  height: 60px;
  font-size: 14px;
  color: #9F9D9D;
  line-height: 20px;
  margin-top: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
}
/* 优质师资体系结束 */

/* 侧边栏楼梯开始 */
.stairs {
  position: fixed;
  top: 50%;
  left: 0px;
  -webkit-transform: translateY(-50%);
  -moz-transform: translateY(-50%);
  -ms-transform: translateY(-50%);
  transform: translateY(-50%);
  padding: 0px;
  background: #fff;
  border-radius: 3px;
  z-index: 99999;
  border-radius: 0px 4px 4px 0px;
  box-shadow: 0 4px 4px 0 rgb(98 98 98 / 2%), 0 16px 32px 0 rgb(87 87 87 / 8%);
}
.stairs-item {
  display: block;
  padding: 0 25px;
  height: 48px;
  line-height: 48px;
  font-size: 14px;
  font-weight: 500;
  color: #999999;
  text-align: center;
  cursor: pointer;
}
.stairs-item .text{
  display: block;
  color: #999999;
  border-bottom: solid 1px #eee;
}
.stairs-item:last-child .text {
  border: none;
}
.stairs-item.active .text{
  color: #5B74FF;
}
/* 侧边栏楼梯结束 */

/* 列表页分类开始 */
.video_class {
  width: 1200px;
  margin: auto;
  padding: 20px 20px;
  box-sizing: border-box;
  line-height: 25px;
}
.video_class .title {
  font-size: 22px;
  font-weight: bold;
}
.video_class .title .icon {
  vertical-align: middle;
  width: 48px;
  height: 20px;
  background: url("../images/hot.png")/*/templates/default/images/hot.png*/ no-repeat;
  margin-left: 2px;
}
.video_class .video_sort li {
  margin-left: 30px;
  font-size: 14px;
  color: #414244;
  line-height: 25px;
  cursor: pointer;
  position: relative;
}
.video_class .video_sort li a {
  font-size: 14px;
  color: #414244;
}
.video_class .video_sort li.active a {
  font-weight: bold;
}
.video_class .video_sort li.active::after {
  content: '';
  display: block;
  position: absolute;
  left: 50%;
  top: 100%;
  width: 24px;
  height: 3px;
  background: #6979FF;
  border-radius: 2px;
  -webkit-transform: translate(-50%, 8px);
  -moz-transform: translate(-50%, 8px);
  -ms-transform: translate(-50%, 8px);
  transform: translate(-50%, 8px);
}
.page-link {
  padding-top: 30px;
}
/* 列表页分类结束 */


/* 详情页 */
.detail_top {
  width: 100%;
  height: 70px;
  background: #fff;
}
.detail_header {
  background: #272626;
  padding: 50px 0 70px;
}
.detail_header .title {
  font-size: 24px;
  font-weight: 500;
  color: #FFFFFF;
  line-height: 33px;
}
.detail_header .subtitle {
  font-size: 16px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.59);
  line-height: 22px;
  margin-top: 7px;
}
.detail_header .video_box {
  margin-top: 22px;
  height: 488px;
}
.detail_header .video_box .player {
  width: 950px;
  height: 100%;
}
.detail_header .video_box .player video{
  width: 100%;
  height: 100%;
}
.detail_header .video_box .video_list {
  width: 250px;
  height: 100%;
  background: #333333;
  margin: 0;
  padding: 0;
}
.detail_header .video_box .video_list .lecturer {
  width: 100%;
  height: 83px;
  display: -webkit-flex;
  display: -moz-flex;
  display: -ms-flexbox;
  display: flex;
  align-items: center;
}
.detail_header .video_box .video_list .lecturer .img_box {
  width: 51px;
  height: 51px;
  border-radius: 50%;
  margin-left: 16px;
  overflow: hidden;
}
.detail_header .video_box .video_list .lecturer .text_box {
  margin-left: 10px;
}
.detail_header .video_box .video_list .lecturer .text_box .name {
  font-size: 16px;
  font-weight: 500;
  color: #FFFFFF;
  line-height: 22px;
}
.detail_header .video_box .video_list .lecturer .text_box .display_num {
  font-size: 14px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.8);
  line-height: 20px;
  margin-top: 7px;
}
.detail_header .video_box .video_list .list {
  height: calc(100% - 135px);
}
.detail_header .video_box .video_list .list .tab{
  width: 100%;
  height: 50px;
  background: #222121;
}
.detail_header .video_box .video_list .list .tab>li{
  width: 50%;
  text-align: center;
  font-size:  16px;
  color: rgba(255,255,255,.5);
  line-height: 50px;
  cursor: pointer;
}
.detail_header .video_box .video_list .list .tab>li.active {
  color: #fff;
}
.detail_header .video_box .video_list .list .class_hour {
  display: none;
}
.detail_header .video_box .video_list .list .class_hour.active {
  display: block;
}
.detail_header .video_box .video_list .list .class_hour .item {
  width: 100%;
  height: 60px;
  cursor: pointer;
  box-sizing: border-box;
  padding: 9px 17px;
}
.detail_header .video_box .video_list .list .class_hour .item.active {
  background: #222121;
}
.detail_header .video_box .video_list .list .class_hour .item:hover {
  background: #222121;
}
.detail_header .video_box .video_list .list .class_hour .item .icon{
  display: inline-block;
  width: 19px;
  height: 17px;
  background: url("../images/video.png")/*/templates/default/images/video.png*/ no-repeat center/cover;
  padding: 0;
  border-radius: 2px;
  margin-right: 5px;
  margin-top: 5px;
}
.detail_header .video_box .video_list .list .class_hour .item .text_box {
  width: calc(100% - 25px);
}
.detail_header .video_box .video_list .list .class_hour .item .text_box .class_title {
  font-size: 15px;
  font-weight: 500;
  color: #FFFFFF;
  line-height: 21px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.detail_header .video_box .video_list .list .class_hour .item .text_box .duration {
  font-size: 12px;
  color: rgba(247, 247, 247, 0.67);
  line-height: 17px;
  margin-top: 3px;
}
.detail_header .video_box .video_list .list .about_video {
  display: none;
  height: 100%;
  overflow: auto;
}
.detail_header .video_box .video_list .list .about_video.active {
  display: block;
}
.detail_header .video_box .video_list .list .about_video::-webkit-scrollbar {
  display: none;
}
.detail_header .video_box .video_list .list ul li {
  width: 100%;
  height: 50px;
  cursor: pointer;
  box-sizing: border-box;
  padding: 0px 17px;
  line-height: 50px;
  font-size: 15px;
  font-weight: 500;
  color: #FFFFFF;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.detail_header .video_box .video_list .list ul li.active {
  background: #222121;
}
.detail_header .video_box .video_list .list ul li:hover {
  background: #222121;
}
.detail_header .video_box .video_list .list ul li a{
  display: block;
  width: 100%;
  height: 100%;
  font-size: 15px;
  font-weight: 500;
  color: #FFFFFF;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.detail_recommend {
  padding: 20px;
}
.detail_recommend .title_box {
  margin-bottom: 8px;
  line-height: 20px;
}
.detail_recommend .title_box .text{
  height: auto;
  font-size: 16px;
  color: #000000;
  line-height: 22px;
}
.detail_recommend .title_box .btn{
  padding: 2px 12px;
  color: #8C8C8C;
  font-size: 14px;
  background: #FFFFFF;
  border-radius: 2px;
  border: 1px solid #D1D1D1;
  cursor: pointer;
}
.detail_contents {
  font-size: 16px;
  color: #000000;
  line-height: 22px;
  padding: 20px;
}
.detail_contents .title {
  margin-bottom: 10px;
}
.detail_contents .text {
  min-height: 100px;
  font-size: 14px;
  color: #666;
  background: #FFFFFF;
  border: 1px solid #E9E9E9;
  padding: 20px;
  line-height: 28px;
}