/* ================================
 * 导航栏样式 navbar
 ================================ */
.navbar {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  -webkit-transition: all 100ms cubic-bezier(0.65, 0, 0.35, 1);
  transition: all 100ms cubic-bezier(0.65, 0, 0.35, 1);
  padding: 0px 0;
}

.navbar .navbar-brand {
  padding: 0;
  /* color: #fff; */
  margin-right: 0;
  /* width: 220px; */
  text-transform: capitalize;
}

.navbar .navbar-brand img {
  display: none;
  /* margin: 1em 0; */
}

.navbar .navbar-brand img.logo-transparent {
  filter: brightness(0) invert(1);
  width: 10em;
  display: block;
}

/*   .navbar .default-nav-btn {
    padding: 11px 30px;
    display: inline-block;
    text-transform: capitalize;
    -webkit-transition: all 0.25s linear;
    transition: all 0.25s linear;
    text-align: center;
    background: transparent;
    border: none;
    outline: none;
    z-index: 5;
    margin-left: 20px;
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    border: 2px solid #fff;
  }
  
.navbar .default-nav-btn span {
    z-index: 1;
    color: #fff;
  }
  
  .navbar .default-nav-btn:hover {
    color: #fff;
  }
  
  .navbar .default-nav-btn:hover span {
    color: #000;
  }
  
  .navbar .default-nav-btn:hover:after {
    border-radius: 8px;
    -webkit-transform: scale(1);
            transform: scale(1);
    -webkit-transform-origin: 0 0;
            transform-origin: 0 0;
  }
  
  .navbar .default-nav-btn:after {
    content: "";
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -4;
    -webkit-transform: scaleX(0);
            transform: scaleX(0);
    position: absolute;
    background: #fff;
    -webkit-transform-origin: 100% 0;
            transform-origin: 100% 0;
    -webkit-transition: -webkit-transform 400ms cubic-bezier(0.65, 0, 0.35, 1);
    transition: -webkit-transform 400ms cubic-bezier(0.65, 0, 0.35, 1);
    transition: transform 400ms cubic-bezier(0.65, 0, 0.35, 1);
    transition: transform 400ms cubic-bezier(0.65, 0, 0.35, 1), -webkit-transform 400ms cubic-bezier(0.65, 0, 0.35, 1);
  } */

.navbar .nav-item .nav-link {
  color: #fff;
  font-size: 1em;
  font-weight: bold;
  padding: 0.5em 1.25em;
  /* margin: 0 1em; */
  text-transform: uppercase;
  /* letter-spacing: 1.2px; */
  display: block;
  position: relative;
  line-height: 4em;
}

.navbar .nav-item .nav-link:after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 3px;
  background: #fff;
  border-radius: .5em;
}

.navbar .nav-item .nav-link.active {
  opacity: 1;
}

.navbar .nav-item .nav-link:not(.active):after {
  left: 0;
  bottom: 0;
  width: 100%;
  height: 3px;
  z-index: 7;
  content: '';
  position: absolute;
  -webkit-transform: scaleX(0);
  transform: scaleX(0);
  -webkit-transform-origin: 100% 0;
  transform-origin: 100% 0;
  background: #fff;
  -webkit-transition: -webkit-transform 0.4s ease;
  transition: -webkit-transform 0.4s ease;
  transition: transform 0.4s ease;
  transition: transform 0.4s ease, -webkit-transform 0.4s ease;
}

.navbar .nav-item .nav-link:not(.active):hover:after {
  -webkit-transform: scaleX(1);
  transform: scaleX(1);
  -webkit-transform-origin: 0 0;
  transform-origin: 0 0;
}

.navbar .nav-item:hover>a {
  color: #fff;
}

.navbar .nav-item.dropdown:hover .nav-link:after {
  -webkit-transform: scaleX(1);
  transform: scaleX(1);
  -webkit-transform-origin: 0 0;
  transform-origin: 0 0;
}

.navbar .nav-item.dropdown .dropdown-menu {
  padding: 10px 0px;
  margin: 0;
  border-radius: 4px;
  background-color: #fff;
  -webkit-box-shadow: 0 3px 15px 0 rgba(0, 0, 0, 0.1);
  box-shadow: 0 3px 15px 0 rgba(0, 0, 0, 0.1);
}

.navbar .nav-item.dropdown .dropdown-menu .dropdown-item {
  width: 100%;
  color: #000;
  font-size: 16px;
  display: block;
  font-weight: 400;
  padding: 12px 20px;
  border-bottom: 1px dashed #36546A;
  position: relative;
  text-decoration: none;
  -webkit-transition: all 0.25s ease;
  transition: all 0.25s ease;
}

.navbar .nav-item.dropdown .dropdown-menu .dropdown-item:hover {
  color: #007bff;
  background-color: transparent;
  /* padding-left: 32px; */
}

.navbar .nav-item.dropdown .dropdown-menu .active {
  background-image: linear-gradient(#2c76d9, #67bfed) !important;
  color: #fff !important;
}

.navbar .nav-item.dropdown .dropdown-menu .dropdown-item:last-child {
  border-bottom: 0;
}

.navbar .nav-item.dropdown .dropdown-toggle {
  padding-right: 1.5em !important;
  cursor: default;
}

.navbar .nav-item.dropdown .dropdown-toggle:after {
  display: inline-block;
  margin-left: 0;
  vertical-align: initial;
  content: "";
  border: none;
}

.navbar .nav-item.dropdown .dropdown-toggle:before {
  content: "\f078";
  top: 50%;
  right: 0.5em;
  position: absolute;
  font-family: "bestitu";
  font-size: 12px;
  -webkit-transition: all 0.25s ease;
  transition: all 0.25s ease;
  -webkit-transform: translateY(-50%);
  transform: translateY(-50%);
}

/* 修改这个选择器，从基于aria-expanded属性改为基于.show类 */
.navbar .nav-item.dropdown.show .dropdown-toggle:before {
  top: 10%;
  -webkit-transform: rotate(180deg);
  transform: rotate(180deg);
}

/* 保留原有的选择器以兼容其他情况 */
.navbar .nav-item.dropdown .dropdown-toggle[aria-expanded="true"]:before {
  top: 10%;
  -webkit-transform: rotate(180deg);
  transform: rotate(180deg);
}

.navbar .navbar-toggler {
  outline: none;
  border: none;
  border-radius: 0;
  padding: 0 1em 0 0;
  outline: none;
  box-shadow: none;
}

.navbar .navbar-toggler .togler-icon-inner span {
  height: 3px;
  margin: 4px;
  width: 20px;
  display: block;
  background: #fff;
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
}

.navbar .navbar-toggler .togler-icon-inner span:nth-child(2) {
  width: 14px !important;
  margin-left: auto;
}

.navbar .navbar-toggler .togler-icon-inner span:last-child {
  margin-bottom: 0;
}

.navbar .navbar-toggler[aria-expanded="true"] .togler-icon-inner span:nth-child(1) {
  -webkit-transform: rotate(-45deg) translate(-5px, 5px);
  transform: rotate(-45deg) translate(-5px, 5px);
}

.navbar .navbar-toggler[aria-expanded="true"] .togler-icon-inner span:nth-child(2) {
  opacity: 0;
}

.navbar .navbar-toggler[aria-expanded="true"] .togler-icon-inner span:nth-child(3) {
  -webkit-transform: rotate(45deg) translate(-5px, -5px);
  transform: rotate(45deg) translate(-5px, -5px);
}

.navbar .search-icon-mobile {
  display: none;
}

/* navbar scrolled 滚动样式 */
.navbar.scrolled {
  border-bottom: none;
  background: #fff;
  -webkit-box-shadow: 0 3px 15px 0 rgba(0, 0, 0, 0.1);
  box-shadow: 0 3px 15px 0 rgba(0, 0, 0, 0.1);
}

.navbar.scrolled .navbar-brand img.logo-normal {
  width: 10em;
  display: block;
}

.navbar.scrolled .navbar-brand img.logo-transparent {
  display: none;
}

.navbar.scrolled .nav-item:hover .nav-link {
  color: #007bff;
}

.navbar.scrolled .nav-item .nav-link {
  color: #000;
  opacity: 1;
}

.navbar.scrolled .nav-item .nav-link.active,
.navbar.scrolled .nav-item .nav-link:hover {
  color: #007bff;
}

.navbar.scrolled .nav-item .nav-link:after {
  background: #007bff;
}

.navbar.scrolled .nav-item .nav-link:not(.active):after {
  background: #007bff;
}

.navbar.scrolled .navbar-toggler .togler-icon-inner span {
  background-color: #000;
}

/* 当屏幕的宽度小于或等于991.98像素时 */
@media only screen and (max-width: 991.98px) {

  /* 不滑动的时候，下拉效果 */
  .navbar-collapse {
    background: #ffffffdb;
    /* -webkit-box-shadow: 0 3px 15px 0 rgba(0, 0, 0, 0.1);
      box-shadow: 0 3px 15px 0 rgba(0, 0, 0, 0.1); */
  }

  .navbar .nav-item .nav-link {
    color: #000;
    padding: 1em 1em;
  }

  .navbar .nav-item .nav-link.active,
  .navbar .nav-item .nav-link:hover {
    color: #007bff;
  }

  .navbar .nav-item .nav-link.active::after,
  .navbar .nav-item .nav-link:hover::after {
    background: #007bff;
    display: none;
  }

  .navbar .nav-item.dropdown .dropdown-menu {
    box-shadow: none;
    border: none;
    background: transparent;
  }

  .navbar .nav-item:hover>a {
    color: #007bff;
  }

  .navbar .nav-item .nav-link:not(.active):after {
    background: #007bff;
    display: none;
  }

  .navbar .nav-item.dropdown .dropdown-toggle[aria-expanded="true"]:before {
    top: 25%;
  }

  /* 不滑动的时候，下拉效果结束 */

  .navbar .container {
    max-width: 100%;
    padding: 0;
  }

  .navbar .navbar-brand {
    padding: 0 0 0 1em;
    margin: 1em 0;
  }

  .navbar .dropdown-toggle:before {
    right: 20px !important;
  }

  .navbar .dropdown-toggle[aria-expanded="true"]:before {
    -webkit-transform: rotate(180deg) !important;
    transform: rotate(180deg) !important;
  }

  .navbar .search-icon-mobile {
    display: block;
    position: absolute;
    background: transparent;
    border: none;
    color: #fff;
    right: 3em;
    top: 1.4em;
    font-size: 1.2em;
  }

  .navbar.navbar.scrolled .search-icon-mobile {
    color: #000;
  }

  .navbar .search-icon {
    display: none;
  }

  .navbar-btn-resp {
    display: none !important;
  }

  /* Header Shrink */
  .navbar.scrolled .nav-item:hover .nav-link {
    color: #007bff;
  }

  .navbar.scrolled .nav-item .nav-link {
    color: #000;
  }

  .navbar.scrolled .nav-item .nav-link.active,
  .navbar.scrolled .nav-item .nav-link:hover {
    color: #007bff;
    -webkit-transition: all 0.25s linear;
    transition: all 0.25s linear;
  }

  .navbar.scrolled .nav-item .nav-link:after {
    background: #007bff;
  }

  .navbar.scrolled .nav-item .nav-link:not(.active):after {
    background: #007bff;
  }

  .navbar.scrolled .togler-icon-inner span {
    background-color: #000;
  }
}

/* 当屏幕的宽度大于991.98像素时 */
@media screen and (min-width: 991.98px) {
  .dropdown-menu {
    border: 0;
    top: 100%;
    left: 0;
    -webkit-transform-origin: top;
    transform-origin: top;
    -webkit-transform: rotateX(90deg) translateY(10px);
    transform: rotateX(90deg) translateY(10px);
    color: #000;
    z-index: 15;
    opacity: 0;
    visibility: hidden;
    display: initial;
    min-width: 15em;
    border-radius: 0;
    position: absolute;
    /* 添加CSS过渡动画 */
    -webkit-transition: all 0.2s ease;
    transition: all 0.2s ease;
  }

  /* 添加这个新样式来解决缝隙问题 */
  .nav-item.dropdown {
    position: relative;
  }
  
  /* 创建透明占位元素，确保鼠标移动的连贯性 */
  .nav-item.dropdown > a.dropdown-toggle:after {
    content: '';
    position: absolute;
    width: 100%;
    /* height: 15px;
    bottom: -10px; */
    left: 0;
    z-index: 1;
    /* 这个元素是透明的，但会捕获鼠标事件 */
  }

  /* 使用CSS实现动画效果，移除JavaScript中的重复动画 */
  .dropdown-menu.show {
    opacity: 1;
    top: 100%;
    visibility: visible;
    -webkit-transform: rotateX(0deg) translateY(0);
    transform: rotateX(0deg) translateY(0);
  }

  .dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    -webkit-transform: rotateX(0deg) translateY(0);
    transform: rotateX(0deg) translateY(0);
  }
}

/* @media screen and (max-width: 1400px) {
    .navbar .default-nav-btn{
      padding: 8px 12px;
    }
  } */
 /* @media screen and (max-width: 1200px) {
    .navbar .default-nav-btn{
      display: none;
    }
  } */

/* ================================
 * 吸顶的二级导航栏样式
=============================== */
.sub-nav {
  background: linear-gradient(180deg, #d7e5f7 0%, #eff6ff 100%);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  top: 5em;
}

.sub-nav .nav-pills .nav-link {
  color: #000000;
  font-weight: bold;
  margin: 0;
  border-radius: 0;
  padding: 1em 1.5em;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.sub-nav .nav-pills .nav-link {
  transition: background-image 0.3s ease;
}

.sub-nav .nav-pills .nav-link.active,
.sub-nav .nav-pills .nav-link.active:hover {
  background-image: linear-gradient(#2c76d9, #67bfed);
  color: #fff;
}

.sub-nav .nav-pills .nav-link:not(.active):hover {
  background-image: linear-gradient(#2c76d940,#67bfed10);
}

/* ============================
 * 新闻分类 导航栏 
 * ============================ */


.news-nav .nav-pills .nav-link {
  padding: 1em 1em;
}

.news-nav .nav-pills .nav-link img {
  width: 3em;
  /* text-align: center; */
  display: block;
  margin: .5em auto;
}

.news-nav .nav-pills .nav-link.active img {
  filter: brightness(0) invert(1);
}