#app {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-sizing: border-box;
  overflow-y: auto;
}
html {
  height: 100%;
}
body {
  width: 100%;
  height: 100%;
  overflow-y: auto;
  box-sizing: border-box;
  position: relative;
}
.scroll_container.subject_1 {
  background-image: url(/learn/static/imgs/ncu/erji1.png);
  background-size: cover;
  background-position: center calc(100% + 67px);
  background-repeat: no-repeat;
}
.scroll_container.subject_2 {
  background-image: url(/learn/static/imgs/ncu/erji4.png);
  background-size: cover;
  background-position: center calc(100% + 67px);
  background-repeat: no-repeat;
}
.scroll_container.subject_4 {
  background-image: url(/learn/static/imgs/ncu/erji3.png);
  background-size: cover;
  background-position: center calc(100% + 67px);
  background-repeat: no-repeat;
}
.scroll_container.subject_3 {
  background-image: url(/learn/static/imgs/ncu/erji2.png);
  background-size: 100% 100%;
  background-position: center calc(100% + 67px);
  background-repeat: no-repeat;
}
.plateform_wrap {
  width: 100%;
  display: flex;
  gap: 25px;
  margin: 30px 0;
}
.plateform_wrap a {
  flex: 1;
  border-radius: 6px;
  box-shadow: 0px 2px 12px 2px rgba(129, 129, 129, 0.1);
  position: relative;
  font-size: 0;
}
.plateform_wrap img {
  width: 100%;
  display: inline-block;
}
.plateform_wrap span {
  position: absolute;
  width: 60%;
  white-space: pre-wrap;
  left: 38%;
  top: 19%;
  line-height: 27px;
  font-size: 16px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
}
.plateform_wrap_3 {
  width: 100%;
  margin: 30px 0;
  height: 128px;
  background-color: #fff;
  display: flex;
  align-items: center;
}
.plateform_wrap_3 img {
  width: auto;
  height: 100%;
}
.plateform_wrap_3 .list {
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  height: 80px;
  justify-content: center;
  margin-left: -220px;
}
.plateform_wrap_3 .list a {
  width: 300px;
  line-height: 40px;
  text-decoration: underline;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.plateform_wrap_3 .more_btn {
  margin-left: auto;
  margin-right: 40px;
  font-size: 16px;
  color: var(--color-primary);
}
.course_card {
  margin-bottom: 25px;
}
.course_block {
  clear: both;
  padding-top: 30px;
}
.course_block .title {
  color: var(--color-primary);
  position: relative;
  text-align: left;
  padding-left: 14px;
  font-size: 24px;
  font-weight: bold;
  color: #2e2e2e;
  line-height: 36px;
  height: 36px;
  margin-bottom: 16px;
}
.course_block .title:before {
  content: "";
  width: 4px;
  height: 30px;
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  background-color: var(--color-primary);
}
.course_block .title .en {
  color: #c6c6c6;
  font-size: 1rem;
  line-height: 1.4rem;
}
.course_block .title .block_more {
  position: absolute;
  bottom: 0;
  right: 0;
  font-size: 12px;
  font-weight: 500;
  color: #10051f;
  cursor: pointer;
}
.course_block .course_block_body {
  width: 100%;
  position: relative;
}
.course_block .course_block_body .is-background button {
  background-color: transparent;
}
.course_block .course_block_body .is-background .active {
  color: var(--color-primary) !important;
}
.course_block .course_block_body .is-background .number {
  background-color: transparent !important;
}
.course_block .course_list .new_card_content,
.course_block .course_list .spec_card_content {
  height: 72px;
}
.course_block .course_list .el-col {
  margin-bottom: 18px;
}
.course_block .swiper-slide {
  width: calc(20% - 9px);
}
.head_pic {
  margin-bottom: 40px;
}
.literature_list {
  background-color: #fff;
  border: 1px solid #cbcbcb;
}
.literature_list .header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #ededed;
  border-bottom: 1px solid #cbcbcb;
  font-size: 14px;
  padding: 10px 20px;
  width: 100%;
}
.literature_list .header .tool_bar {
  display: flex;
  background-color: #cccccc;
}
.literature_list .header .tool_bar .bar_item {
  padding: 5px 10px;
  cursor: pointer;
}
.literature_list .header .tool_bar .bar_item + .bar_item.active {
  border-left: 1px solid transparent;
}
.literature_list .header .tool_bar .bar_item.active {
  background-color: #333333;
  color: #fff;
}
.literature_list .header .tool_bar .bar_item.active + .bar_item {
  border-left: 1px solid transparent;
}
.literature_list .header .tool_bar .bar_item + .bar_item {
  border-left: 1px #f3f3f3 dotted;
}
.literature_list .item {
  display: block;
  padding: 0 20px;
  width: 100%;
}
.literature_list .item + .item .title {
  border-top: 1px #999999 dotted;
}
.literature_list .item .title {
  padding: 10px 0;
  color: initial;
  font-size: 20px;
  width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.literature_list .item .title:hover {
  text-decoration: underline;
}
@media screen and (max-width: 768px) {
  #app #main.container {
    padding-top: 20px;
  }
  #app {
    height: auto;
    min-height: 100vh;
  }
  .course_block {
    padding-top: 20px;
  }
  .head_pic {
    width: 100%;
    height: 220px;
    object-fit: cover;
    margin-bottom: 0;
  }
  .plateform_wrap {
    display: block;
    margin-bottom: 20px;
    margin-top: 0;
  }
  .plateform_wrap > a {
    display: block;
    width: 100%;
  }
  .plateform_wrap > a + a {
    margin-top: 10px;
  }
  .plateform_wrap_3 {
    height: auto;
    position: relative;
    margin: 0;
  }
  .plateform_wrap_3 img {
    height: auto;
    width: 100%;
  }
  .plateform_wrap_3 .list {
    flex: 1;
    margin-left: 36vw;
    position: absolute;
  }
  .plateform_wrap_3 .list a {
    width: 80%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .plateform_wrap_3 .list a:nth-child(n + 3) {
    display: none;
  }
  .plateform_wrap_3 .more_btn {
    position: absolute;
    right: 10px;
    margin-right: 0;
  }
}
.tabs_content {
  width: 100%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0) 100%);
  border-radius: 8px;
  padding: 25px 12.5px;
  display: flex;
  flex-wrap: wrap;
}
.tabs_content .card_item {
  width: 20%;
  padding: 0 12.5px;
}
.tabs_content .card_item:hover {
  transform: scale(1.02);
}
.tabs_content .content_title {
  font-weight: 600;
  font-size: 20px;
  color: #ffffff;
  line-height: 28px;
}
.tabs_content .el-empty {
  color: #fff;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.knowledge_course_card {
  width: 100%;
  display: block;
  border-radius: 8px;
  overflow: hidden;
  background-color: #fff;
  margin-bottom: 25px;
}
.knowledge_course_card .cover_box {
  position: relative;
}
.knowledge_course_card .cover_box .tool_bar {
  width: 100%;
  position: absolute;
  bottom: 0;
  left: 0;
  line-height: 30px;
  color: #ffffff;
  padding: 0 10px;
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
}
.knowledge_course_card .cover_box .tool_bar .like {
  display: flex;
  align-items: center;
}
.knowledge_course_card .cover_box .tool_bar .like .iconfont {
  margin-right: 6px;
  margin-top: -2px;
}
.knowledge_course_card .cover_box .tag {
  position: absolute;
  left: 8px;
  top: 8px;
  color: #fff;
  border-radius: 4px;
  padding: 2px 10px;
  font-size: 14px;
}
.knowledge_course_card .cover_box .tag .iconfont {
  margin-top: -2px;
  font-size: 12px;
}
.knowledge_course_card .cover_box img {
  width: 100%;
  height: 100%;
}
.knowledge_course_card .content_box {
  height: 73px;
  background-color: #fff;
  color: #fff;
  padding: 0 10px;
}
.knowledge_course_card .content_box .name,
.knowledge_course_card .content_box .desc {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 100%;
  line-height: 1;
}
.knowledge_course_card .content_box .name {
  padding-top: 14px;
  font-size: 18px;
  color: #000;
}
.knowledge_course_card .content_box .desc {
  padding-top: 14px;
  font-size: 14px;
  color: #000;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.knowledge_course_card .content_box .desc .nameTeacher {
  flex: 1;
  white-space: nowrap;
  /* 禁止换行 */
  overflow: hidden;
  /* 隐藏超出部分 */
  text-overflow: ellipsis;
}
.knowledge_course_card.teacher .cover_box {
  height: 120px;
  display: flex;
  position: relative;
  justify-content: center;
}
.knowledge_course_card.teacher .cover_box .cover {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 32px;
}
.knowledge_course_card.teacher .cover_box .cover img {
  width: 95px;
  height: 95px;
  border-radius: 99px;
}
.knowledge_course_card.teacher .cover_box .cover .add_btn {
  width: 42px;
  height: 42px;
  background: linear-gradient(180deg, #0eaef6 0%, #04dbe4 100%);
  box-shadow: 0px 6px 8px 0px rgba(4, 219, 228, 0.23);
  color: #fff;
  font-size: 20px;
  margin-top: -21px;
  border-radius: 99px;
  text-align: center;
  line-height: 42px;
}
.knowledge_course_card.teacher .cover_box .tag {
  background: linear-gradient(270deg, #a57dff 0%, #9952ff 100%);
}
.knowledge_course_card.live .cover_box {
  height: 120px;
}
.knowledge_course_card.live .cover_box .tag {
  background: linear-gradient(270deg, #fe8a81 0%, #fd5069 100%);
  border-radius: 99px;
}
.knowledge_course_card.course .cover_box {
  height: 120px;
}
.knowledge_course_card.course .cover_box .tag {
  background: linear-gradient(270deg, #5dbbff 0%, #358cfc 100%);
}
.knowledge_course_card.knowledge .cover_box {
  height: 120px;
}
.knowledge_course_card.knowledge .cover_box .tag {
  background: linear-gradient(270deg, #01d5c4 0%, #00afc2 100%);
}


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