.video-lesson-container{
  width: 100%;
  height: 100%;
}
.mobile-page-title > .title-center{
  background-color: rgba(0, 0, 0, 0);
}
.title-center>.title-text{
  color: #FFF;
}
.top-bg{
  width: 100%;
  display: block;
  position: absolute;
  top: 0px;
  left: 0px;
  
  -webkit-filter: blur(10px);
  -moz-filter: blur(10px);
  -o-filter: blur(10px);
  -ms-filter: blur(10px);
  filter: blur(10px);
  z-index: -1;
}

.introduce {
  padding: 5px 16px;
  color: #fff;
  margin-top: 7px;
  box-sizing: border-box;
}
.introduce > .tit {
  font-size: 16px;
}
.introduce > .introduce-detail {
  font-size: 10px;
  margin-top: 10px;
  display: flex;
  align-items: center;
}
.introduce-detail>img{
  display: block;
  width: 10px;
  height: 10px;
  margin-right: 6px;
}
.introduce-detail>span{
  margin-right: 17px;
}
.price-tip{
  width: 100%;
  height: 60px;
  background-color: #fff;
  margin-top: 5px;
  padding: 0px 16px;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
}
.price-tip .price-tag{
  /* color: #0D54B2; */
  font-size: 22px;
  vertical-align: bottom;
}
.price-tag>.old-price{
  font-size: 12px;
  color: #999;
  text-decoration: line-through;
}
.joined-num{
  display: block;
  margin-left: auto;
  font-size: 12px;
  color: #999;
  transform: scale(.9);
}
.watch-link , .watch-link:visited{
  display: flex;
  align-items: center;
  margin-left: auto;
  color: #FF0000;
  font-size: 10px;
}
.watch-link>img{
  width: 13px;
  height: 13px;
  margin-left: 7px;
}

.video-lesson-content{
  background-color: #F5F5F5;
  overflow: hidden;
}
.course-tabs{
  background-color: #fff;
  display: flex;
  align-items: center;
  margin-top: 10px;
  border-bottom: 1px solid #DDD;
}
.course-tabs>.tab-item{
  height: 100%;
  width: max-content;
  padding: 13px;
  box-sizing: border-box;
  /* color: #666; */
  font-size: 16px;
  position: relative;
}
.course-tabs>.tab-item:first-child{
  margin-left: auto;
  margin-right: 60px;
}
.course-tabs>.tab-item:last-child{
  margin-right: auto;
}
.tab-item.active{
  /* color: #ba221f; */
}

.tab-item.active::after{
  content: '';
  display: block;
  width: 2em;
  height: 2px;
  position: absolute;
  bottom: 0px;
  left: 13px;
  /* background-color: #0D54B2; */
}


.text {
  padding: 22px 0 15px;
  text-align: center;
  color: #333333;
  font-weight: bold;
  font-size: 15px;
}

.course_introduce {
  position: relative;
}
.course_bg {
  height: 190px;
  position: absolute;
  z-index: 10;
  width: 100%;
  overflow: hidden;
}
.course_bg img {
  display: block;
  width: 100%;
  height: 190px;
  filter: blur(10px);
}

.course_bg  .meng {
  width: 100%;
  height: 190px;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 14;
  background-color: rgba(0, 0, 0, 0.5);
}

.ind {
  position: relative;
  z-index: 11;
  padding: 16px;
  color: #fff;
}
.course_t  .course_tit {
  font-size: 20px;
  font-weight: bold;
  text-align: center;
  padding: 25px 0 15px;
}

.course_t  .coure_remark {
  padding-top: 15px;
  font-size: 14px;
  font-weight: bold;
  text-align: center;
  padding-bottom: 22px;
}
    

.course_c {
  border-radius: 10px;
  padding: 18px 15px;
  display: flex;
  flex-direction: column;
  background-color: #fff;
}
.course_c .con_title {
  display: block;
  color: #444444;
  font-size: 16px;
  padding-bottom: 8px;
  font-weight: bold;
}

.course_c .con_p {
  color: #666666;
  font-size: 14px;
  line-height: 2;
  padding-bottom: 18px;
}
.course-content{
  width: 100%;
}
.course-content-details{
  padding: 0px 15px;
  box-sizing: border-box;
}
.knowledge-point{
  display: flex;
  margin-bottom: 10px;
}
.dot{
  width: 10px;
  height: 10px;
  background-color: #43BC60;
  margin-right: 7px;
  border-radius: 50%;
  flex-shrink: 0;
  transform: translateY(25%);
}
.knowledge-text{
  line-height: 15px;
  color: #666;
  font-size: 10px;
}


/* 目录 */

.course-catalog {
  background-color: #fff;
  box-sizing: border-box;
  display: none;
}
.catalog-block {
  padding: 0px;
}
.catalog-title {
  font-size: 16px;
  color: #222;
  height: 50px;
  line-height: 50px;
  display: block;
  padding-left: 16px;
  background-color: #f5f5f5;
}
.catalog-list{
  
  padding: 0px 16px;
  overflow: hidden;
}
.catalog-sub-title , .catalog-sub-title:hover , .catalog-sub-title:visited {
  height: 45px;
  font-size: 14px;
  color: #666;
  border-bottom: 1px solid #EEE;
  display: flex;
  align-items: center;
  margin-bottom: 10px;
}
.catalog-sub-title.active{
  color: #E13B29;
}
.word {
  display: flex;
  align-items: center;
}
.catalog-type{
  display: block;
  width: 30px;
  padding: 2px 0px;
  margin-right: 10px;
  text-align: center;
  /* border: 1px solid #0D54B2; */
  border-radius: 3px;
  /* color: #0D54B2; */
  font-size: 12px;
}
/* .sp {
  display: block;
  font-size: 10px;
  color: #6a696e;
  padding: 1px 3px;
  margin-top: 2px;
  margin-right: 10px;
  border: 1px solid #3d3d3d;
  border-radius: 2px;
} */

.name {
  max-width: 250px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.course-lock{
  display: block;
  width: 15px;
  height: 15px;
  margin:0px auto;
}

.btn-state {
  height: 100%;
  text-align: center;
  display: flex;
  align-items: center;
  margin-left: auto;
}
.btn-state >img{
  display: block;
  width: 22px;
  height: 22px;
}
span.free {
  display: block;
  color: #43bc60;
  font-size: 12px;
}
      



/* 底部购买栏 */

.buybuybuy{
  width: 100%;
  height: 50px;
  background-color: #fff;
  color: #666;
  font-size: 10px;
  padding: 0px 16px;
  box-sizing: border-box;
  box-shadow: 0px -2px 15px -3px rgba(0,0,0,.3);
  position: fixed;
  bottom: 0px;
  left: 0px;
  z-index: 9999;
  display: flex;
  align-items: center;
}
/* 立即购买 */
.buy-now , .buy-now:hover , .buy-now:visited{
  display: block;
  width: 100%;
  height: 50px;
  line-height: 50px;
  /* background-color: #0D54B2; */
  color:#FFF;
  font-size: 16px;
  letter-spacing: 1px;
  text-align: center;
  box-shadow: 0px -2px 15px -3px rgba(0,0,0,.3);
  position: fixed;
  bottom: 50px;
  left: 0px;
  z-index: 9999;
}
/* 购买栏占位div */

.buybuybuy-fixed-block{
  width: 100%;
  height: 50px;
}

.buy-services{
  text-align: center;
  font-size: 10px;
  color: #666;
  margin-right: 20px;
}
.buy-services>img{
  width: 16px;
  height: 16px;
  display: block;
  margin: 0px auto 5px;
}
.buy-btn-content{
  margin-left: auto;
  display: flex;
}
.buy-btn{
  width: 100px;
  height: 28px;
  color: #FFF;
  font-size: 11px;
  text-align: center;
  line-height: 28px;
  letter-spacing: 1px;
}
.buy-btn-content>.buy-btn:first-child{
  background-color: #DE8533;
  border-top-left-radius: 14px;
  border-bottom-left-radius: 14px;
}
.buy-btn-content>.buy-btn:last-child{
  background-color:#E13B29;
  border-top-right-radius: 14px;
  border-bottom-right-radius: 14px;
}