ÉùÃ÷ CSS ±äÁ¿ 
:root {
    --primary-color: #1668b1;
    --primary-d: #1668b1;
    --primary-bg: #1668b1;
    --primary-bg-s: #1668b1;
    --background-color: #fff;
    --vw: 1px;
  }
.header_main {
  opacity: 1!important;
  height: 100px;
  line-height:100px;
  /* padding: 1rem 0; */
  background: transparent;
  position:fixed;
  left: 0;
  top: 0;
  z-index: 9999;
  width: 100%;
  /* border-bottom: 1px solid #fff; */
}
.header_main .header {
  padding: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.header_main .header .header_logok {
  width: 15rem;
  /* height: 4.6rem; */
  line-height: 0;
  cursor: pointer;
  display: inline-block;
  flex:0 0 auto;
}
.header_main .header .header_logok .header_logo {
  width: 100%;
  height: 100%;
}
.header_main .header .header_tablist {
  display: flex;
  justify-content: center;
  align-items: center;
}
.header_main .header .header_tablist .tabitem {
  color: #fff;
  font-size: 1rem;
  position: relative;
  cursor: default;
  transition: all .08s linear;
  white-space:nowrap;
  display: flex;
  justify-content: center;
}
@media screen and (max-width: 1440px) {
  .header_main .header .header_tablist .tabitem {
    padding: 0 1rem;
  }
}
@media screen and (min-width: 1440px) {
  .header_main .header .header_tablist .tabitem {
    padding: 0 1rem;
  }
}
@media screen and (min-width: 1680px) {
  .header_main .header .header_tablist .tabitem {
    padding: 0 2rem;
  }
}
@media screen and (min-width: 1920px) {
  .header_main .header .header_tablist .tabitem {
    padding: 0 3rem;
  }
}
.header_main .header .header_tablist .tabitem .line {
  display: none;
  position: absolute;
  width: 50%;
  bottom: 10px;
  height: 4px;
  background: #ffffff;
  z-index: 999;
}
.header_main .header .header_tablist .tabitem:hover {
  /* transform: translateY(-3px); */
  text-decoration: none;
}
.header_main .header .header_tablist .active .line {
  display: block;
}
.header_main .header .header_tablist .tabitem .tabitem_text {
  position: relative;
  z-index: 10;
  font-size: 1.1rem;
}
.header_main .header .header_right {
  display: flex;
  align-items: center;
  position: relative;
}
.header_main .header .header_right .header_langiconk {
  width: 3.16666667rem;
  height: 3.16666667rem;
  line-height: 0;
  margin-left: 1.25rem;
  cursor: pointer;
  position: relative;
  background: var(--primary-color);
  all: unset;
}
.header_searchicon{
  background: var(--primary-color);
  all: unset;
}
.header_main .header .header_right .header_langiconk .choose_lang {
  display: flex;
  align-items: center;
  opacity: 0.8;
}
.header_main .header .header_right .header_langiconk .choose_lang:hover {
  opacity: 1;
  cursor: pointer;
}
.header_main .header .header_right .header_langiconk .choose_lang .langicon {
  width: 24px;
  height: 24px;
}
.header_main .header .header_right .header_langiconk .choose_lang .choose_lang_title {
  white-space: nowrap;
  color: #ffffff;
}
.header_main .header .header_right .header_langiconk .lang_set {
  display: none;
  position: absolute;
  z-index: 50;
  left: 0;
  top: 66px;
  width: 12rem;
  border-radius: 0.5rem;
  background: #FFF;
  padding: 0.83333333rem 0;
}
.header_main .header .header_right .header_langiconk .lang_set .setitem {
  height: 3.33333333rem;
  line-height: 3.33333333rem;
  text-align: center;
  font-size: 1.16666667rem;
  cursor: pointer;
  color: #101010;
  white-space: nowrap;
}
.header_main .header .header_right .header_langiconk .lang_set .setitem:hover {
  background: #1668b1;
  color: #fff;
}
.header_main .header .header_right .header_login {
  height: 100%;
  line-height: 3.33333333rem;
  font-size: 1.33333333rem;
  color: #fff;
  padding-left: 1.25rem;
  cursor: pointer;
  transition: all 0.1s linear;
  opacity: 0.8;
}
.header_main .header .header_right .header_login:hover {
  opacity: 1;
}
.header_main .header .header_right .header_userk .header_user {
  display: flex;
  align-items: center;
  padding: 0 0 0 1.25rem;
  position: relative;
  cursor: pointer;
}
.header_main .header .header_right .header_userk .header_user .user_img {
  width: 3.33333333rem;
  height: 3.33333333rem;
  object-fit: cover;
  border-radius: 50%;
}
.header_main .header .header_right .header_userk .header_user .user_icon {
  margin-left: 0.91666667rem;
  width: 1rem;
  transform-origin: center center;
  transform: rotate(180deg);
  transition: all .1s linear;
}
.header_main .header .header_right .header_userk .header_user .user_set {
  display: none;
  position: absolute;
  z-index: 50;
  right: 0;
  top: 115%;
  min-width: 13.33333333rem;
  border-radius: 0.5rem;
  background: #fff;
  padding: 0.83333333rem 0;
}
.header_main .header .header_right .header_userk .header_user .user_set .setitem {
  height: 3.33333333rem;
  line-height: 3.33333333rem;
  text-align: center;
  font-size: 1.16666667rem;
  padding: 0 1.66666667rem;
  cursor: pointer;
  white-space: nowrap;
  color: #101010;
}
.header_main .header .header_right .header_userk .header_user .user_set .setitem:hover {
  background: #1668b1;
  color: #fff;
}
.header_main .header .header_right .header_userk .header_user.active .user_icon {
  transform: rotate(0deg);
}
.header_fff .header_main,
.header_main.notop {
  background: #1668b1;
  border: none;
}
.header_fff .header_main .header .header_tablist,
.header_main.notop .header .header_tablist {
  display: flex;
}
.header_fff .header_main .header .header_tablist .tabitem,
.header_main.notop .header .header_tablist .tabitem {
  color: #FFFFFF;
}
.header_fff .header_main .header .header_tablist .tabitem.active,
.header_main.notop .header .header_tablist .tabitem.active {
  color: #FFFFFF;
}
/* .header_fff .header_main .header .header_tablist .tabitem .line,
.header_main.notop .header .header_tablist .tabitem .line {
  display: none;
} */
.header_fff .header_main .header .langicon,
.header_main.notop .header .langicon {
  background: #1668b1;
  border-radius: 50%;
}
.header_fff .header_main .header .header_login,
.header_main.notop .header .header_login {
  color: #1668b1;
}
.second-menu{
  display: none;
  width:100%;
  height: 80px;
  line-height: 80px;
  background-color: #ffffff;
  position: absolute;
  top: 100px;
}

.header_auto {
  background-color: #1668b1;
  height: 100px;
}
.show-second-menu {
  display: flex;
  justify-content: center;
  align-items: center;
}
.menu-list{
  display:flex;
  justify-content: space-around;
  align-items: center;
  width: 800px;
  .menu-list-item a{
      color:#333333;
      cursor:pointer;
      font-family: "Source Han Sans CN Bold";
      font-size: 16px;
      margin-right: 40px;
    }
}
.search{
  display: flex;
  align-items: center;  
  opacity: 0.8;
}
.search:hover{
  opacity: 1;
}
.search-icon{
  width: 24px;
  height: 24px;
  cursor: pointer;
}
.search-title{
  color: #ffffff;
}
.lang_set a{
  color:#333333;
  display: block;
  width:100%;
  height: 100%;
}
.lang_set a:hover{
  text-decoration: none;
  color:#ffffff;
}