body {
  font-size: var(--responsive-font-size);
}

:root {
  --bs-blue: #1d8bd8;
  --bs-blue-light: #e6f7ff;
}

.btn-primary {
  --bs-btn-bg: var(--bs-blue);
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 0;
  margin: 0;
  background-image: url(../images/midbg.png);
  background-repeat: no-repeat;
  background-size: 100% 610px;
  background-color: #f5f5f5;
}

body a {
  text-decoration: none;
  color: inherit;
}

body a:hover {
  /* text-decoration: underline;
  color: var(--bs-blue); */
}

.head-section {
  position: relative;
}

.head-section > .head-section-top {
  background-image: url(../images/topbg.jpg);
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center bottom;
  position: relative;
}

.form-control-wrapper {
  position: relative;
}
.head-section .form-control {
  /* background-color: rgba(0,0,0, .1); */
}

.head-section-top-right {
  position: relative;
}
/* 
.head-section-top-right .top-purpose {
  position: absolute;
  right: 0;
  top: 0;
} */

.head-section .dropdown-menu {
  /* background-color: #fff; */
}

.header-logo {
  height: 100px;
}

.banner-img {
  width: 100%;
  border-radius: 8px;
}

.index-link2 {
  /* height: 2rem; */
  /* height: 5.5rem; */
}
.index-link2 .btn-group .btn {
  font-size: 1.4rem;
  height: 5.5rem;
}

.index-link2 .btn-group .dropdown-menu {
  width: calc(100% - 16px);
	overflow-y: auto;   /* 启用垂直滚动条 */
	max-height: 300px;
}

.index-link2 .btn-group .dropdown-menu .dropdown-item {
  font-size: 0.8rem;
  line-height: 1rem;
}

.quick-link-btn a {
  /* flex: 1; */
  text-align: center;
  /* padding: 15px; */
  border-radius: 5px;
  transition: all 0.3s ease;
}

.quick-link-btn:hover a {
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.quick-link-btn a {
  display: inline-block;
  width: 100%;
  /* height: 100%; */
}

.quick-link-btn a img {
  width: 100%;
  /* height: 100%; */
  object-fit: content;
  height: 5.5rem;
}

.index-links {
  background-color: #fff;
}

.index-links .col {
  border-right: 1px solid rgba(0, 0, 0, 0.1);
  height: 8rem;
  /* display: flex;
  align-items: center;
  justify-items: center;
  flex: 1; */
}

.index-links .col:last-child {
  border-right: none;
}

.index-links .col a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

.index-links .col a .link-title {
  color: var(--bs-blue);
  /* margin-top: 1rem; */
}

.index-links .col a .link-icon {
  color: #666;
}
.index-links .col:hover a .link-icon {
  color: var(--bs-blue);
}

footer {
  margin-top: auto;
  padding: 20px 0;
  text-align: center;
  background-color: #f8f9fa;
  border-top: 1px solid #dee2e6;
}

.navbar-custom {
  background-color: var(--bs-blue) !important;
  /* box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  transition: box-shadow 0.3s ease;
  color: #fff; */
}
/* .navbar-custom .nav-link {
  color: #fff;
} */
.navbar-custom.scrolled {
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
}

.navbar-nav {
  width: 100%;
}

.navbar-nav .nav-item {
  flex: 1;
}

.navbar-nav .nav-item .nav-item-icon {
  display: inline-block;
  width: 35px;
  height: 35px;
  background-image: url(../images/nav_icon.png);
  background-repeat: no-repeat;
  background-position: top center;
}

.navbar-nav .nav-item .nav-link {
  font-size: 18px;
  text-align: center;
  padding-bottom: 16px;
  border-radius: 8px 8px 0 0;
  font-weight: 700;
  color: #fff;
}
.navbar-nav .nav-item .nav-link.active,
.navbar-nav .nav-item .nav-link.show {
  /* color: #fff; */
  color: var(--bs-blue);
  background-color: #f5f5f5;
}
.navbar-nav .nav-item .nav-link:hover {
  color: var(--bs-blue);
  background-color: #f5f5f5;
}

.navbar-brand-text {
  font-size: 2rem;
  margin-left: 10px;
  line-height: 1.2;
}

.index-banner {
  /* background-color: #fff; */
}

.index-banner .banner-item {
  width: 100%;
  height: 460px;
  position: relative;
}

.index-banner .banner-item img {
  width: 100%;
  height: 100%;
  vertical-align: bottom;
  object-fit: cover;
}

.index-banner .banner-title {
  position: absolute;
  left: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.3);
  color: #fff;
  width: 100%;
  padding: 10px;
}

.navbar-brand-container {
  display: flex;
  align-items: center;
}

.navbar-brand-subtext {
  font-size: 1rem;
  color: #6c757d;
  line-height: 1.2;
}

.footer-section {
  background-color: var(--bs-blue);
  color: #fff;
}

.list-card .list-item {
  padding-left: 18px !important;
  background: url(../images/icon-dot.png) 5px center no-repeat;
  background-position: 0 19px;
}
.list-card .list-item:hover {
  background: url(../images/icon-dot-hover.png) 5px center no-repeat;
  background-position: 0 19px;
}

.index-body .section-card .card-item {
  padding-left: 10px !important;
  background: url(../images/icon-dot.png) 5px center no-repeat;
  background-position: 0 8px;
}
.index-body .section-card .card-item:hover {
  background: url(../images/icon-dot-hover.png) 5px center no-repeat;
  background-position: 0 8px;
}

@media (min-width: 1440px) {
  .navbar-brand-text strong {
    letter-spacing: 0.3rem;
  }
}
@media (min-width: 1200px) and (max-width: 1439px) {
  .navbar-brand-text {
    font-size: 1.3rem;
    margin-left: 5px;
  }
  .navbar-brand-text strong {
    letter-spacing: 0.3rem;
  }
}

@media (min-width: 720px) and (max-width: 1200px) {
  .header-logo {
    height: 70px;
  }
  .navbar {
    padding-bottom: 8px !important;
  }
  .nav-item .nav-link {
    padding-bottom: 8px;
  }
  .navbar-brand-text {
    font-size: 1.5rem;
    margin-left: 15px;
  }

  .navbar-brand-subtext {
    font-size: 0.65rem;
  }

  .index-banner .banner-item {
    height: 320px;
  }
  .form-control-wrapper .form-control {
    /* display: none; */
    position: absolute;
    right: 0;
    top: 0;
    top: -20px;
    width: 75px;
    border-radius: 0.375rem !important;
    transition: width 0.3s ease;
  }

  .form-control-wrapper .form-control:focus {
    width: 250px;
  }

  .form-control-wrapper .btn {
    display: none;
  }

  .head-section-top-right .top-purpose {
    transform: scale(0.6);
    position: absolute;
    right: -70px;
    top: -10px;
  }

  .research-team .list-card .dept-item  {
    width: 30%;
  }
}

/* 响应式调整 */
@media (max-width: 720px) {
  .header-logo {
    height: 40px;
  }
  .navbar {
    padding-bottom: 8px !important;
  }
  .nav-item .nav-link {
    padding-bottom: 8px;
  }
  .navbar-brand-text {
    font-size: 1rem;
    margin-left: 10px;
  }
  .navbar-brand-text .navbar-brand-text-cn {
    white-space: wrap;
    text-align: center;
  }
  .navbar-brand-subtext {
    font-size: 0.75rem;
  }
  .hero-section,
  .content-section {
    padding: 1.5rem 0;
  }

  .index-banner .banner-item {
    height: 200px;
  }

  /* .form-control-wrapper .form-control {
    display: none;
    position: absolute;
  } */

  .form-control-wrapper .form-control {
    /* display: none; */
    position: absolute;
    right: 0;
    top: 37px;
    z-index: 99;
    width: 75px;
    border-radius: 0.375rem !important;
    transition: width 0.3s ease;
  }

  .form-control-wrapper .form-control:focus {
    width: calc(100vw - 60px);
  }

  .form-control-wrapper .btn {
    display: none;
  }
  .head-section-top-right .top-purpose {
    transform: scale(0.5);
    position: absolute;
    right: -70px;
    top: -10px;
  }

  .research-team .list-card .dept-item  {
    width: 45%;
  }

  .research-team  .list-card .dept-item .teachar-img {
    width: 100px;
    height: 150px;
  }

  .research-team  .list-card .dept-item .dept-name {
    width: 100px;
  }
	
	.research-team-detail .list-card .dept-item {
		flex-direction: column;
	}
	.research-team-detail .list-card .dept-item .dept-name {
		text-align: center;
	}
	.research-team-detail .list-card .dept-item .dept-item-left {
		 display: flex;
    justify-content: center;
	}
	.research-team-detail .list-card .dept-item .dept-item-right {
      padding-left: 0rem;
				padding-top: 1rem;
	}
}

.research-field > div {
  /* padding: 20px; */
}

.research-field .research-field-inner {
  background-color: #fff;
  padding: 10px 20px 20px;
  min-height: 298px;
}

.research-field .research-field-inner .nav-link {
  font-size: 1.25rem;
}


.research-field .tab-content {
  /* padding: 20px; */
}

.research-field .nav-tabs {
  /* border-bottom: none; */
  background-color: #fff;
  margin-bottom: 20px;
}

.research-field .nav-tabs .nav-link {
  color: var(--bs-blue);
  font-weight: normal;
  padding: 0.5rem;
  outline: none;
  transition: none;
}

.research-field .nav-tabs .nav-link:hover {
  background-color: #f5f5f5;
}

.research-field .nav-tabs .nav-link {
  color: var(--bs-blue);
  border: none;
  border-bottom: 2px solid transparent;
}

.research-field .nav-tabs .nav-link.active {
  color: var(--bs-blue);
  border: none;
  border-bottom: 2px solid var(--bs-blue);
}

.research-field .research-field-inner .card-item a:hover {
  text-decoration: underline;
  color: var(--bs-blue);
}

.research-field .research-field-more {
  position: absolute;
  right: 0;
  top: 10px;
  cursor: pointer !important;
}