/* common */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family:  PingFangSC, PingFang SC;
  list-style: none;
}
a {
  text-decoration: none;
}
@media (min-width: 1600px) {
  .container, .container-lg, .container-md, .container-sm, .container-xl, .container-xxl {
      width: 1520px;
  }
}
@media (min-width: 1500px) {
  .container, .container-lg, .container-md, .container-sm, .container-xl, .container-xxl {
      width: 1420px;
  }
}
/* header */
.header {
  width: 100%;
  height: 100vh;
}
.header-image {
  width: 100%;
  height: 100vh;
}
.header-image img {
  width: 100%;
  height: 100vh;
}
.header-menu {
  position: absolute;
  top: 17px;
  left: 0;
  right: 0;
}
.header-language {
  text-align: right;
  color: #00499F;
  font-size: 14px;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  font-weight: 500;
}
.header-language a {
  color: #00499F;
}
.header-language .btn-search {
  width: 18px;
  height: 18px;
  cursor: pointer;
  background: url(../images/icon-search.png) no-repeat center;
  background-size: 100%;
  margin-left: 10px;
}
.header-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.header-nav .logo {
  text-indent: -9999px;
  width: 263px;
  height: 50px;
  background: url(../images/logo-nav.png) no-repeat center;
  background-size: 100%;
}
.nav {
  flex: 1;
  display: flex;
  justify-content: space-between;
}
.nav .nav-item {
  position: relative;
  flex: 1;
}
.nav .nav-sub {
  position: absolute;
  top: 100%;
  left: 0;
  background: #fff;
  display: none;
  padding: 0 10px;
  min-width: 100%;
}
.nav .nav-item:hover .nav-sub{
  display: block;
}
.nav-link {
  padding: 0;
  text-align: center;
  color: #003779;
}
.nav-sub-item {
  display: block;
  text-align: center;
  padding: 10px 0;
  border-bottom: 1px dashed #E5E5E5;
  white-space: nowrap;
  color: #003779;
}

/* 最新动态 latest-news */
.latest-news {
  width: 100%;
  background: url(../images/latest-news-bg.png) no-repeat;
  background-size: 100% 100%;
  height: 100vh;
}
.latest-news .container {
  display: flex;
  justify-content: space-between;
  padding: 45px 0;
}
.latest-news h2 {
  margin-top: 18px;
  width: 10%;
}
.latest-news h2 span {
  display: block;
}
.latest-news h2 span.title-en {
  font-size: 30px;
  color: #C8C8C8;
  line-height: 30px;
  font-weight: 200;
}
.title-en-border {
  position: relative;
  padding-bottom: 10px;
  margin-bottom: 15px;
}
.title-en-border::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0%;
  width: 34px;
  height: 4px;
  background: #00499F;
}
.title-en-border::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 36px;
  width: 4px;
  height: 4px;
  background: #00499F;
}
.latest-news h2 span.title-cn {
  font-size: 19px;
  font-weight: 600;
  color: #333333;
}

.latest-news .news-list {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  margin-right: -18px;
}
.latest-news .news-img {
  width: calc(50% - 36px);
  margin: 8px 18px;
  height: calc((100vh - 90px) / 3 - 16px);
}
.latest-news .news-img img {
  width: 100%;
  height: 100%;
}
.latest-news .news-item {
  width: calc(50% - 36px);
  margin: 8px 18px;
  height: calc((100vh - 90px) / 3 - 16px);
  background: #fff;
  position: relative;
  border-radius: 15px;
  padding: 23px 30px;
}
.latest-news .news-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 93px;
  height: 74.5px;
  background: url(../images/latest-news-item-bg2.png) no-repeat;
  background-size: 100% 100%;
}
.latest-news .news-item-title {
  display: flex;
  justify-content: space-between;
}
.latest-news .news-item-title .time {
  margin-top: 6px;
  font-size: 22px;
  color: #005EFF;
  line-height: 22.5px;
  letter-spacing: 1px;
  font-family: math;
  width: 90px;
}
.latest-news .news-item-title p {
  padding-left: 17px;
  font-size: 18px;
  color: #000000;
  line-height: 22px;
  max-height: 44px;
  overflow: hidden;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2; /* 限制文本显示为2行 */
  flex: 1;
}
.latest-news .news-item-content {
  display: flex;
  justify-content: space-between;
}
.latest-news .news-item-content .time {
  font-size: 16px;
  color: #666666;
  line-height: 15px;
  position: relative;
  padding-bottom: 4px;
  width: 90px;
  margin-top: 10px;
}
.latest-news .news-item-content .time::before {
  content: '';
  position: absolute;
  top: 15px;
  left: 0;
  transform: translateY(-50%);
  width: 38px;
  height: 4px;
  background: url(../images/latest-news-item-time.png) no-repeat;
  background-size: 100% 100%;
}
.latest-news .news-item-content p {
  padding-left: 17px;
  flex: 1;
  font-size: 14px;
  color: #666666;
  line-height: 30px;
  height: 90px;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3; /* 限制文本显示为2行 */
  overflow: hidden;
}

/* notice-index */
.notice-index {
  width: 100%;
  height: 100vh;
  background: url('../images/notice-bg.png') no-repeat;
  background-size: 100% 100%;
}
.notice-index .container {
  position: relative;
  padding: 123px 0 80px;
  height: 100vh;
}
.notice-index h2 {
  position: absolute;
  top: 60px;
}
.notice-index h2 span {
  display: block;
}
.notice-index h2 span.title-en {
  font-size: 30px;
  color: #fff;
  line-height: 30px;
  font-weight: 300;
}
.notice-index .title-en-border::after {
  background: #fff;
}
.notice-index .title-en-border::before {
  background: #fff;
}
.notice-index h2 span.title-cn {
  font-size: 19px;
  font-weight: 600;
  color: #fff;
}
.notice-index .notice-list {
  display: flex;
  margin-right: -22px;
  flex-wrap: wrap;
  justify-content: space-between;
  margin-left: 230px;
  height: 100%;
}
.notice-index .notice-item {
  width: calc(50% - 44px);
  min-height: 130px;
  margin: 10px 22px;
  background: #fff url('../images/notice-item-bg.png') no-repeat;
  background-size: 100% 100%;
  border-radius: 10px;
  padding: 30px;
}

.notice-index .notice-item-time {
  position: relative;
  display: flex;
}
.notice-index .notice-item-time::before {
  content: '';
  position: absolute;
  right: 0;
  bottom: 0;
  width: 38px;
  height: 4px;
  background: url(../images/latest-news-item-time.png) no-repeat;
  background-size: 100% 100%;
}
.notice-index .notice-item-time .date {
  font-size: 22px;
  color: #005EFF;
  line-height: 22.5px;
  letter-spacing: 1px;
  font-family: math;
  display: inline-block;
}
.notice-index .notice-item-time .year {
  color: #666666;
  margin-left: 10px;
  vertical-align: bottom;
  margin-top: 10px;
  font-size: 12px;
}
.notice-index .notice-item-content {
  font-size: 18px;
  line-height: 30px;
  margin-top: 20px;
}
.notice-index  .notice-more {
  width: 36px;
  height: 36px;
  margin-top: -52px;
}
.notice-index  .notice-more img {
  width: 100%;
  height: 100%;
}

/* leagug-index */
.leagug-index {
  height: 100vh;
  width: 100%;
  background: url('../images/league-bg.png') no-repeat;
  background-size: 100% 100%;
  padding: 35px 0 55px;
}
.leagug-index h2 {
  color: #B00204;
}
.leagug-index h2 span {
  display: block;
}
.leagug-index h2 span.title-en {
  font-size: 30px;
  font-weight: 300;
}
.leagug-index h2 span.title-cn {
  font-size: 19px;
  font-weight: 600;
  position: relative;
  padding-bottom: 6px;
}
.leagug-index h2 span.title-cn::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0%;
  width: 34px;
  height: 4px;
  background: #B00204;
}
.leagug-index h2 span.title-cn::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 36px;
  width: 4px;
  height: 4px;
  background: #B00204;
}
.m-slide {
  display: flex;
  margin-top: 20px;
  height: calc(100vh - 200px);
  border: 1px red solid;
}
#currentNews {
  flex: 1;
  height: 100%;
}
#currentNews {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
}
#currentNews .news-item-img {
  flex: 1;
  height: calc(100% - 70px);
}
#currentNews .news-item-img a {
  display: block;
  width: 100%;
  height: 100%;
}
#currentNews .news-item-img img {
  width: 100%;
  height: 100%;
}
#currentNews .news-item-content {
  background: #C90014;
  height: 70px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 30px;
  color: #fff;
  line-height: 30px;
}
#currentNews .news-item-content p {
  margin: 0;
}
.leagug-index .news-list {
  width: 30%;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 0;
}
.leagug-index .news-list li {
  height: 25%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background-color: #F8E6D6;
  padding: 0 10px;
}
.leagug-index .news-list li span {
  color: #C90014;
}
.leagug-index .news-list li p {
  color: #333333;
  margin-top: 10px;
  padding: 0;
  margin-bottom: 0;
}
.leagug-index .news-list li.active {
  background-color: #C90014;
}
.leagug-index .news-list li.active span, .leagug-index .news-list li.active p {
  color: #fff;
}
.leagug-index .news-list img {
  display: none;
}

/* research-index */
.research-index {
  height: 100vh;
  width: 100%;
  background: url('../images/research-bg.png') no-repeat;
  background-size: 100% 100%;
  padding: 35px 0 55px;
}
.research-index h2 {
  display: flex;
}
.research-index .title-en {
  display: block;
  color: #C8C8C8;
  font-size: 30px;
  line-height: 30px;
  font-weight: 200;
}
.research-index .title-cn {
  color:#333333;
  font-size: 19px;
  font-weight: 600;
  color: #333333;
  margin-left: 10px;
}
.research-item {
  margin: 5px 0;
}
.research-item-box {
  background: #fff;
  border-radius: 15px;
}
.research-item img {
  width: 100%;
  height: calc(50vh - 230px);
  border-radius: 15px 15px 0 0;
}
.research-item-content {
  padding: 10px 20px;
  font-size: 16px;
  line-height: 30px;
}
.research-item-content span {
  color: #fff;
  background: linear-gradient(to right, #00359C, #00A9AA);
  padding: 0 5px;
  border-radius: 4px;
  margin-right: 10px;
}
.research-more {
  text-align: center;
  margin-top: 20px;
}
.research-more img {
  width: 36px;
  height: 36px;
  cursor: pointer;
}

.academic-item {
  background: #fff;
  border-radius: 15px;
  height: calc(50vh - 145px);
  margin-bottom: 10px;
  position: relative;
}
.academic-item::after {
  position: absolute;
  content: '';
  width: 255px;
  height: 80%;
  background: url('../images/academic-item-bg.png') no-repeat;
  background-size: 100% 100%;
  bottom: 0;
  left: 0;
  z-index: 0;
}

.academic-item-time {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 20px;
  z-index: 1;
}
.academic-item-time span {
  color: #002B87;
  font-size: 16px;
  line-height: 30px;
  text-align: center;
}
.academic-item-time span.date {
  font-size: 34px;
}
.academic-item-content {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 20px;
  z-index: 1;
}
.academic-item-content p.title {
  font-size: 18px;
  font-weight: 500;
  height: 30px;
  line-height: 30px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.academic-item-content p.author, .academic-item-content p.time, .academic-item-content p.address {
  padding-left: 30px;
}
.academic-item-content p.author {
  background: url(../images/academic-user.png) no-repeat left center;
  background-size: 16px 16px;
}
.academic-item-content p.time {
  background: url(../images/academic-time.png) no-repeat left center;
  background-size: 16px 16px;
}
.academic-item-content p.address {
  background: url(../images/academic-adress.png) no-repeat left center;
  background-size: 16px 16px;
}

/* researchNews-index 研究团队 */
.researchNews-index {
  height: 100vh;
  width: 100%;
  background: url('../images/researchNews-bg.jpg') no-repeat;
  background-size: 100% 100%;
  padding: 35px 0 55px;
}
.researchNews-index h2 {
  display: flex;
  color: #fff;
  height: 25vh;
  align-items: center;
}
.researchNews-index .title-en {
  display: block;
  font-size: 30px;
  line-height: 30px;
  font-weight: 200;
}
.researchNews-index .title-en-border::before  {
  background: #fff;
}
.researchNews-index .title-en-border::after {
  background: #fff;
}
.researchNews-index .title-cn {
  font-size: 19px;
  font-weight: 600;
  margin-left: 10px;
  margin-bottom: 8vh;
}
.researchNews-item {
  height: 40vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 20px;
  text-align: center;
}
.researchNews-col:nth-child(1) .researchNews-item {
  background: url('../images/researchNews-item-1.png') no-repeat;
  background-size: 100% 100%;
}
.researchNews-col:nth-child(2) .researchNews-item {
  background: url('../images/researchNews-item-2.png') no-repeat;
  background-size: 100% 100%;
}
.researchNews-col:nth-child(3) .researchNews-item {
  background: url('../images/researchNews-item-3.png') no-repeat;
  background-size: 100% 100%;
}
.researchNews-item p.title {
  font-size: 21px;
  color: #000;
  font-weight: 500;
  position: relative;
  z-index: 1;
  padding-top: 80px;
}
.researchNews-item p.title::after {
  position: absolute;
  content: '';
  width: 58px;
  height: 58px;
  top: 0; 
  left: 50%;
  transform: translateX(-50%);
}
.researchNews-col:nth-child(1) .researchNews-item p.title::after {
  background: url('../images/researchNews-item-icon-1.png') no-repeat;
  background-size: 100% 100%;
}
.researchNews-col:nth-child(2) .researchNews-item p.title::after {
  background: url('../images/researchNews-item-icon-2.png') no-repeat;
  background-size: 100% 100%;
}
.researchNews-col:nth-child(3) .researchNews-item p.title::after {
  background: url('../images/researchNews-item-icon-3.png') no-repeat;
  background-size: 100% 100%;
}
.researchNews-item p.content {
  font-size: 16px;
  line-height: 30px;
}
.researchNews-more {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 26vh;
}
.researchNews-more img {
  width: 36px;
  height: 36px;
  cursor: pointer;
}

.grsduate-index {
  height: 100vh;
  width: 100%;
  padding: 35px 0 55px;
}
.grsduate-index h2 {
  display: flex;
  color: #C8C8C8;
  flex-direction: column;
}
.grsduate-index .title-en {
  display: block;
  font-size: 30px;
  line-height: 30px;
  font-weight: 200;
}

.grsduate-index h2 span {
    display: block;
}
.grsduate-index h2 span.title-cn {
  font-size: 19px;
  font-weight: 600;
  color: #333333;
}

.slider-wrapper {
  width: 100%;
  overflow: hidden;
  margin-top: 30px;
}
.slider {
  display: flex;
}
.slider .slide-item {
  flex: 1;
}
.slider .slide-item .title {
  font-weight: 500;
  text-align: center;
  margin-top: 20px;
}
.ptjs-index {
  height: 40vh;
  display: flex;
  justify-content: center;
  align-items: center;
}
.ptjs-list .ptjs-item {
  background: #FFFFFF;
  box-shadow: 0px 0px 46px 0px rgba(0,0,0,0.08);
  padding: 20px;
  display: flex;
  height: 88px;
  justify-content: center;
  align-items: center;
}
.ptjs-list .ptjs-item img {
  width: 57px;
  height: 35px;
}
.ptjs-list .ptjs-item p.title {
  text-align: center;
  flex: 1;
  margin-bottom: 0;
}
.footer-section {
  display: flex;
  flex-direction: column;
}
.footer {
  background: url('../images/footer-bg.png') no-repeat;
  background-size: 100% 100%;
  padding-top: 130px;
  color: #fff;
  height: 60vh;
}
.footer-logo {
  text-align: center;
}
.footer-logo img {
  width: 230px;
}
.footer-links {
  margin-top: 15px;
}
.footer-links .title {
  text-align: center;
}
.footer .links {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 15px;
}
.dropdown-toggle {
  border-radius: 4px;
  border: 1px solid #EBEBEB;
  width: 300px;
  text-align: left;
  background: transparent;
  color: #fff;
  margin: 0 20px;
}
.dropdown-toggle .caret {
  float: right;
  margin-top: 10px;
}
.footer-copyright {
  padding-top: 54px;
  padding-bottom: 20px;
  text-align: center;
}