/* 分类列表样式 */
.sort-type-l {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
}

.sort-type-i {
  margin-right: 10px;
  margin-bottom: 10px;
  background-color: #007bff;
  border: 1px solid #ddd;
  border-radius: 3px;
  padding: 5px 10px;
  cursor: pointer;
  font-size: 14px;
  color: #333;
  transition: background-color 0.2s ease;
}

.sort-type-i a {
  color: #fff;
}

.sort-type-i:hover,
.sort-type-i.active {
  background-color: #ff0000;
  color: #fff;
}

/* 课程列表样式 */
.icourse-course {
  margin-bottom: 20px;
  border: 1px solid #ddd;
  border-radius: 3px;
  overflow: hidden;
}

.icourse-course-thumb {
  position: relative;
  display: block;
  overflow: hidden;
}

.icourse-course-thumb img {
  display: block;
  width: 100%;
  height: auto;
}

.icourse-course-thumb .icourse-course-tip {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(0, 0, 0, 0.5);
  color: #fff;
  font-size: 12px;
  padding: 5px;
}

.icourse-course-info {
  padding: 10px;
}

.icourse-course-title {
  font-size: 16px;
  font-weight: bold;
  margin: 0;
  margin-bottom: 5px;
}

.icourse-course-desc {
  font-size: 14px;
  margin: 0;
  margin-bottom: 10px;
  color: #666;
}

.icourse-course-meta {
  font-size: 12px;
  color: #999;
}

.icourse-course-meta span {
  margin-right: 10px;
}


/* “查看更多”按钮样式 */
.icourse-bottom-seemorebtn {
  display: block;
  width: 120px;
  height: 40px;
  line-height: 40px;
  text-align: center;
  margin: 20px auto;
  background-color: #337ab7;
  color: #fff;
  border-radius: 3px;
  text-decoration: none;
  font-size: 14px;
  transition: background-color 0.2s ease;
}

.icourse-bottom-seemorebtn:hover {
  background-color: #286090;
}

.icourse-open-list>li {
  width: 236px;
  margin-right: 23px;
  margin-bottom: 30px;
  float: left;
}

.icourse-img {
  height: 134px;
  position: relative;
  border: 1px solid #e4e4e4;
}

.icourse-type {
  position: absolute;
  width: 100%;
  z-index: 10;
}

.icourse-img>a {
  display: block;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.icourse-img>a img {
  width: 100%;
  height: 100%;
  display: block;
  background: none;
  border: none;
  transition: all .3s;
  -moz-transition: all .3s;
  -webkit-transition: all .3s;
  -o-transition: all .3s;
}

.icourse-desc {
  height: 170px;
  color: #333;
  font-size: 12px;
  background-color: #ffffff;
  border: 1px solid #e4e4e4;
  border-top: none;
  padding: 3px 12px;
}

ul {
  padding: 30px;
  margin: 5px;
  list-style: none;
}

#loadTypeData {
  display: none;
}

.icourse-study-mooc {
  display: block;
  display: inline-block;
  padding-left: 15px;
  background: url(https://www.icourses.cn/web/icourse/page/imgs/sort-num.jpg) no-repeat center left;
}

.icourse-open-list>li.last {
  margin-right: 24px;
}

.clearfix::after {
  content: " ";
  display: block;
  clear: both;
}

.logo {
  text-align: center;
}
.back{
  position: fixed;
  bottom: 50px;
  right: 50px;
  background-color: #007bff;
}
.back a{
  color: #ddd;
  text-decoration: none;
  font-size: 20px;
  font-weight: bolder;
}