.koi_banner a {
  display: block;
  height: 200px;
}

.bg_F0F8FE {
  background: #F0F8FE;
}

.koi_tab_menu {
  display: flex;
  align-items: center;
  height: 72px;
}

.koi_tab_menu li {
  font-family: PingFang SC;
  font-size: 20px;
  font-weight: 600;
  line-height: 28px;
  text-align: left;
  color: #000;
  margin-left: 48px;
  box-sizing: border-box;
  cursor: pointer;
  padding: 22px 0;
  position: relative;
}

.koi_tab_menu li.active::after {
  position: absolute;
  content: '';
  background: #0085FF;
  height: 3px;
  top: 52px;
  width: 100%;
}

.koi_tab_menu li.active {
  color: #0085FF;
}

.koi_tab_menu li.on_pop {
  position: relative;
}

.koi_tab_menu li.on_pop .bubble {
  position: absolute;
  top: 70px;
  left: -25px;
  background: #fff;
  box-shadow: 3px 0px 11px 0px rgba(117, 117, 117, 0.34);
  border-radius: 2px;
  display: none;
  z-index: 999;
}

.koi_tab_menu li.on_pop .bubble .item {
  height: 50px;
  width: 138px;
  border-radius: 2px;
  font-size: 18px;
  font-weight: 400;
  line-height: 50px;
  text-align: center;
  color: #000;
}

.koi_tab_menu li.on_pop .bubble .item:hover {
  background: #e5f4ff;
}

.koi_tab_menu li.on_pop:hover .bubble {
  display: block;
}

.koi_tab_menu li:first-child {
  margin-left: unset;
}

.koi_title {
  font-family: PingFang SC;
  text-align: center;
  font-size: 28px;
  font-weight: 600;
  line-height: 39px;
  color: black;
  position: relative;
}

.koi_title ::before {
  position: absolute;
  content: '';
  width: 92px;
  height: 16px;
  top: 12px;
  margin-left: -124px;
  background: url(../images/hn_education_platform/title_left.png) no-repeat center;
}

.koi_title ::after {
  position: absolute;
  content: '';
  width: 92px;
  height: 16px;
  top: 12px;
  margin-left: 26px;
  background: url(../images/hn_education_platform/title_right.png) no-repeat center;
}

.work_trend_box {
  display: flex;
  justify-content: space-between;
  font-family: PingFang SC;
  margin-top: 40px;
  box-sizing: border-box;
}

.work_trend_box .left {
  width: 430px;
}

.work_trend_box .left a {
  display: inline-block;
}

.work_trend_box .left a img {
  display: inline-block;
  width: 430px;
  height: 250px;
}

.work_trend_box .right {
  width: 740px;
}

.work_trend_box .right .Working_top {
  border-bottom: 1px solid #d9d9d9;
  box-sizing: border-box;
}

.work_trend_box .right .Working_top .Working_title {
  font-size: 24px;
  font-weight: 600;
  line-height: 34px;
  color: #000;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
}

.work_trend_box .right .Working_top .Working_content {
  font-size: 14px;
  font-weight: 400;
  line-height: 20px;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
  margin-top: 10px;
  padding-bottom: 10px;
}

.work_trend_box .right .Working_list {
  margin-top: 19px;
}

.work_trend_box .right .Working_list li {
  margin-bottom: 14px;
}

.work_trend_box .right .Working_list li .item {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  font-weight: 400;
  line-height: 20px;
  color: #555555;
  position: relative;
}

.work_trend_box .right .Working_list li .item .text_tool {
  padding-left: 16px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 555px;
}

.work_trend_box .right .Working_list li .item::before {
  position: absolute;
  content: '';
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: #1a49a1;
  border-radius: 50%;
}

.work_trend_box .right .Working_list li:hover .item span {
  color: #0085FF;
}

.koi_more {
  display: inline-block;
  margin-top: 13px;
  font-family: PingFang SC;
  font-size: 14px;
  font-weight: 400;
  line-height: 20px;
  text-align: left;
  color: #1a49a1;
}

.case_list {
  display: flex;
  margin-top: 40px;
}

.case_list li {
  width: 285px;
  height: 300px;
  background: #fff;
  border: 1px solid #DADADA;
  border-radius: 10px;
  margin-left: 20px;
}

.case_list li:first-child {
  margin-left: unset;
}

.case_list li .case_tololi_img {
  height: 175px;
  width: 285px;
}

.case_list li .case_tololi_img img {
  display: inline-block;
  height: 175px;
  width: 285px;
}

.case_list li :hover .case_contnt_box .title {
  color: #0085FF;
}

.case_list li .case_contnt_box {
  padding: 12px;
  box-sizing: border-box;
  font-family: PingFang SC;
}

.case_list li .case_contnt_box .title {
  font-family: Inter;
  font-size: 18px;
  font-weight: 400;
  line-height: 22px;
  color: #000;
  width: 230px;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
}

.case_list li .case_contnt_box .team {
  font-size: 12px;
  font-weight: 400;
  line-height: 17px;
  margin-top: 16px;
  color: #888;
}

.case_list li .case_contnt_box .annual {
  margin-top: 7px;
  font-size: 12px;
  font-weight: 400;
  line-height: 17px;
  color: #888;
}

.koi_btn_view_more {
  display: inline-block;
  height: 42;
  width: 161px;
  border-radius: 23.117948532104492px;
  font-family: PingFang SC;
  font-size: 17px;
  font-weight: 400;
  line-height: 42px;
  letter-spacing: 0em;
  text-align: center;
  color: #0085FF;
  background: #E5F4FF;
}

.mgt35 {
  margin-top: 35px;
}

.work_trendtar_box {
  border: 1px solid #f0f0f0;
  box-sizing: border-box;
  padding: 28px 20px;
}

.bread_crumbs {
  font-family: PingFang SC;
  font-size: 16px;
  font-weight: 400;
  line-height: 22px;
  text-align: left;
  color: #878787;
  display: flex;
  align-items: center;
}

.bread_crumbs .c878787 {
  color: #878787;
}

.icon_home {
  display: inline-block;
  width: 25px;
  height: 22px;
  background: url(../images/hn_education_platform/icon-Union.png) no-repeat center;
}

.icon_Vector {
  display: inline-block;
  width: 16px;
  height: 17px;
  background: url(../images/hn_education_platform/icon_Vector.png) no-repeat center;
}

.message_list {
  font-family: PingFang SC;
  margin-top: 20px;
}

.message_list li {
  border-bottom: 1px dashed #CACACA;
  width: 100%;
  position: relative;
  padding: 20px 0 15px 0;
}

.message_list li:first-child {
  border-top: 1px dashed #CACACA;
}

.message_list li::before {
  position: absolute;
  top: 24px;
  left: 5px;
  content: '';
  width: 14px;
  height: 14px;
  background: #D9D9D9;
  transform: rotate(45deg);
}

.message_list li:hover .item span {
  color: #0085FF;
}

.message_list li .item {
  font-size: 16px;
  font-weight: 400;
  line-height: 22px;
  display: flex;
  justify-content: space-between;
}

.message_list li .item .text {
  padding-left: 40px;
  color: #222222;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 800px;
}

.message_list li .item .sun {
  color: #666666;
}

.koibox {
  margin-top: 20px;
  border-top: 1px dashed #CACACA;
  padding: 25px 15px 0 15px;
  box-sizing: border-box;
}

.two.case_list {
  flex-wrap: wrap;
  margin-top: unset;
}

.two.case_list li {
  width: 260px;
  height: 270px;
  margin-left: 26px;
  margin-top: 27px;
}

.two.case_list li:nth-child(4n+1) {
  margin-left: unset;
}

.two.case_list li:nth-child(-n+4) {
  margin-top: unset;
}

.two.case_list li .case_tololi_img {
  width: 260px;
  height: 157px;
}

.two.case_list li .case_tololi_img img {
  width: 260px;
  height: 157px;
}

.two.case_list li :hover .case_contnt_box .title {
  color: #0085FF;
}

.two.case_list li .case_contnt_box {
  padding: 10px;
}

.two.case_list li .case_contnt_box .title {
  color: #333333;
  font-size: 16px;
  line-height: 19px;
  width: 200px;
}

.Article_details_box {
  margin-top: 17px;
  border-top: 1px dashed #CACACA;
  text-align: center;
}

.Article_details_box .Article_title {
  color: #000000;
  font-family: PingFang SC;
  font-size: 18px;
  font-weight: 400;
  line-height: 25px;
  text-align: left;
  padding-top: 43px;
  display: inline-block;
}

.Article_of_time {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 15px;
  background: #F6F6F6;
  margin-top: 34px;
}

.Article_of_time .left {
  font-size: 14px;
  font-weight: 400;
  line-height: 20px;
  text-align: left;
  color: #000;
}

.pdl80 {
  padding-left: 80px;
}

.pdl50 {
  padding-left: 50px;
}

.icon_Weibo {
  display: inline-block;
  width: 28px;
  height: 28px;
  background: url(../images/hn_education_platform/icon-weibo.png) no-repeat center;
}

.icon_Weixin {
  display: inline-block;
  width: 28px;
  height: 28px;
  background: url(../images/hn_education_platform/icon-weixin.png) no-repeat center;
}

.icon_QQ {
  display: inline-block;
  width: 28px;
  height: 28px;
  background: url(../images/hn_education_platform/icon-QQ.png) no-repeat center;
}

.pdr7 {
  padding-right: 7px;
}

.Article_of_contents {
  text-align: center;
  width: 996px;
  margin: 0 auto;
}

.Article_of_contents .item_text {
  font-family: PingFang SC;
  font-size: 14px;
  font-weight: 400;
  line-height: 20px;
  letter-spacing: 0em;
  text-align: left;
  color: #000;
}

.Article_of_contents .item_img img {
  display: inline-block;
  width: 745px;
  height: 375px;
}

.Article_of_contents .item_video {
  display: inline-block;
  width: 387px;
  height: 248px;
}

.Article_of_contents .item_video img {
  display: inline-block;
  width: 387px;
  height: 248px;
}

.text_2em {
  text-indent: 2em;
}

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

.Article_up_down .item {
  display: inline-block;
  width: 380px;
  font-family: PingFang SC;
  font-size: 14px;
  font-weight: 400;
  line-height: 20px;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: #888888;
}

.Article_up_down .item:hover {
  color: #0085FF;
}