.course .course-box {
  display: flex;
  justify-content: space-between;
}

.course .course-box .left {
  width: 885px;
}

.course .course-box .left .con {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 5px;
  overflow: hidden;
}

.course .course-box .left .con .list-t {
  display: flex;
}

.course .course-box .left .con .list-t .item {
  position: relative;
  flex-shrink: 0;
  height: 32px;
  margin: 0 5px;
  padding: 0 12px;
  color: #666;
  font-size: 16px;
  line-height: 32px;
  border-radius: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.course .course-box .left .con .list-t .item.active {
  color: #fff;
  background: #1a4299;
}

.course .course-box .left .course-list {
  display: flex;
  flex-direction: column;
  gap: 20px 0;
  padding: 20px 0;
}

.course .course-box .left .course-list .item {
  display: flex;
  box-sizing: border-box;
  padding: 20px;
  border: 1px solid #eee;
  border-radius: 10px;
}

.course .course-box .left .course-list .item .item-l {
  width: 200px;
  margin-right: 20px;
}

.course .course-box .left .course-list .item .item-l .img {
  width: 200px;
  height: 116px;
  object-fit: cover;
  border-radius: 10px;
}

.course .course-box .left .course-list .item .item-l .btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 15px;
  color: #fff;
  font-size: 16px;
  line-height: 32px;
  text-align: center;
}

.course .course-box .left .course-list .item .item-l .btn .btn1 {
  width: 95px;
  height: 32px;
  background: #ff4500;
  border-radius: 16px;
  cursor: pointer;
}

.course .course-box .left .course-list .item .item-l .btn .btn2 {
  width: 95px;
  height: 32px;
  background: #1a4299;
  border-radius: 16px;
}

.course .course-box .left .course-list .item .item-r {
  flex: 1;
}

.course .course-box .left .course-list .item .item-r .name {
  width: 580px;
  padding: 10px 0;
  overflow: hidden;
  color: #333;
  font-size: 20px;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.course .course-box .left .course-list .item .item-r .des {
  display: flex;
  color: #666;
  font-size: 14px;
  line-height: 28px;
}

.course .course-box .left .course-list .item .item-r .des .des-c {
  display: -webkit-box;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
}

.course .course-box .right {
  width: 295px;
}

.course .course-detail .container {
  padding-top: 20px;
  padding-bottom: 20px;
}

.course .course-detail .detail {
  display: flex;
}

.course .course-detail .detail .img {
  width: 400px;
  height: 232px;
  object-fit: cover;
  border-radius: 16px;
}

.course .course-detail .detail .detail-r {
  position: relative;
  flex: 1;
  padding: 0 50px 0 30px;
  line-height: 25px;
}

.course .course-detail .detail .detail-r .title {
  margin: 0;
  padding: 10px 0;
  color: #333;
  font-weight: 400;
  font-size: 22px;
}

.course .course-detail .detail .detail-r .info {
  padding: 5px 10px;
  background: linear-gradient(90deg, #f6f6f6, #fff);
  border-radius: 10px;
}

.course .course-detail .detail .detail-r .info .des {
  position: relative;
  width: 650px;
  overflow: hidden;
  color: #333;
  font-size: 14px;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.course .course-detail .detail .detail-r .btn {
  position: absolute;
  bottom: 0;
  left: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 175px;
  height: 40px;
  color: #fff;
  font-size: 18px;
  background: #ff4500;
  border-radius: 20px;
  cursor: pointer;
}

.course .course-detail .parse {
  margin-top: 10px;
  color: #333;
  font-size: 16px;
  line-height: 34px;
  word-wrap: break-word;
  word-break: break-all;
}

.course .course-detail .parse h1,
.course .course-detail .parse h2,
.course .course-detail .parse h3,
.course .course-detail .parse h4,
.course .course-detail .parse h5,
.course .course-detail .parse h6 {
  color: #333;
  font-weight: 400;
  font-size: 14px;
  line-height: 32px;
  word-wrap: break-word;
  word-break: break-all;
}