.header {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}
.header_bg {
  position: absolute;
  left: 0;
  top: 0;
  z-index: -1;
  width: 100%;
  height: 150px;
}
.header .header_main {
  width: 1200px;
  height: 150px;
  display: flex;
  justify-content: space-between;
}
.header .header_main .logo {
  width: 541px;
  height: 100px;
  align-self: center;
}
.header .header_main .header_icons {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 0.78125vw;
  background: #b3d7fe;
  width: 116px;
  height: 24px;
  border-radius: 10px;
}
.header .header_main .header_icons .header_icon:nth-child(1) {
  width: 20px;
  height: 20px;
  margin-top: 2px;
}
.header .header_main .header_icons .header_icon:nth-child(2) {
  width: 21px;
  height: 17px;
  margin-top: 2px;
  margin-left: 16px;
}
.header .header_main .header_icons .header_icon:nth-child(3) {
  margin-left: 16px;
  width: 11px;
  height: 18px;
}
.header .header_main .header_icons .header_icon {
  position: relative;
  cursor: pointer;
}
.header .header_main .header_icon .qrcode_box {
  position: absolute;
  left: -7px;
  bottom: -110px;
  background-color: #fff;
  width: 100px;
  height: 100px;
  display: none;
}
#qrcode {
  width: 100px;
  height: 100px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.header .header_main .header_icon .qrcode_box::before {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 8px;
  border-color: transparent transparent #fff transparent;
  position: absolute;
  top: -16px;
  left: 5px;
}
.header .header_main .header_icon  .qrcode_box.input_box {
  width: 220px;
  height: 35px;
  top: 30px;
  left: 0;
}
.header .header_main .header_icon  .qrcode_box .flex {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
}
.header .header_main .header_icon  .qrcode_box .search_input {
  height: 25px;
  border: 1px solid #1160b1;
  border-right: none;
  appearance: none;
  outline: none;
}

.header .header_main .header_icon  .qrcode_box .search_btn {
  background-color: #1160b1;
  width: 25px;
  height: 25px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}

.header .header_main .header_icon  .qrcode_box .search_btn img {
  width: 18px;
  height: 18px;
}

.navbar_nav {
  width: 100%;
  height: 70px;
  background-color: #1461b3;
  display: flex;
  justify-content: center;
}
.navbar_nav .nav {
  width: 1200px;
  height: 100%;
  display: flex;
  align-items: center;
}
.navbar_nav .nav .nav_item {
  flex: 1;
  height: 50px;
  margin-left: 36px;
  line-height: 50px;
  text-align: center;
  cursor: pointer;
  position: relative;
  border-radius: 5px;
}
.navbar_nav .nav .nav_item:nth-child(1) {
  margin-left: 0;
}
.navbar_nav .nav .nav_item:hover {
  background-color: #2271d0;
}
.navbar_nav .nav .nav_item a {
  color: #fff;
  font-size: 20px;
}
.navbar_nav .nav_card {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 99999;
  background-color: #ffffff;
  min-height: 215px;
  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
  border: 1px solid #dedddd;
  display: none;
}
.navbar_nav .nav_box {
  display: flex;
}
.navbar_nav .nav_card .nav2 {
  width: 162.5px;
  padding: 6px 6px;
  background-color: #ededed;
  line-height: initial;
  flex-shrink: 0;
}
.navbar_nav .nav_card .nav2 li {
  padding: 10px 5px;
  text-align: left;
}
.navbar_nav .nav_card .nav2 li:hover {
  background-color: #cdcdcd;
}
.navbar_nav .nav_card .nav2 a {
  display: block;
  border-bottom: 1px solid #dddddd;
}
.navbar_nav .nav_card .nav2 a:last-child {
  border-bottom: none;
}
.navbar_nav .nav_card .nav2 a {
  font-size: 14px;
  color: #000 !important;
}
.navbar_nav .nav_card .nav_content {
  display: none;
  overflow: hidden;
}
.navbar_nav .nav_card .nav_article {
  width: 188px;
  margin: 10px;
  display: block;
}
.navbar_nav .nav_card .nav_text1 {
  position: absolute;
  bottom: 0;
  left: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  background-color: rgba(0, 0, 0, 0.6);
  color: #fff;
  width: 100%;
  height: 40px;
  line-height: 40px;
}
.navbar_nav .nav_card .img_box2{
  position: relative;
}
.navbar_nav .nav_card .nav_text2 {
  line-height: 30px;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
  color: #646464;
  font-size: 14px;
}
.navbar_nav .nav_card .nav_img {
  width: 100%;
  height: 110px;
}
.navbar_nav .nav_card .exhibition_box {
  width: 335px;
  padding: 15px;
}
.navbar_nav .nav_card .exhibition_box .img_box {
  width: 100%;
  position: relative;
  height: 150px;
}
.navbar_nav .nav_card .exhibition_box .img_box .img {
  width: 100%;
  height: 100%;
}
.navbar_nav .nav_card .exhibition_box .img_box .title {
  position: absolute;
  bottom: 0;
  left: 0;
  background-color: rgba(0, 0, 0, 0.6);
  color: #fff;
  width: 100%;
  height: 33px;
  line-height: 33px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 18px;
  padding: 0 15px;
}
.navbar_nav .nav_card .exhibition_box .exhibition_content {
  word-break: break-all;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
  font-size: 14px;
  color: #646464;
  line-height: 24px;
  margin-top: 6px;
}