a:active {
    /*color: red; */
    background: linear-gradient(90deg, #1582BB 0%, #28D8D6 100%);
    -webkit-background-clip: text; 
    -webkit-text-fill-color: transparent; 
}
.header{
  width: 100vw;
  height: 1rem;
  background-color: #112D36;
  color: white;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.16rem;
  box-sizing: border-box;
  padding: 0 1rem;
  position: fixed;
  top: 0;
  left: 0;
}
.header_logo{
  /*width: 1.09rem;*/
  /*height: 0.5rem;*/
  
  width: 1.5rem;
}
.header_nav{
  height: 100%;
  display: flex;
  align-items: center;
}
.header_nav .header_nav_ul_1{
  height: 100%;
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}
.header_nav .header_nav_ul_1 li{
    position: relative;
}
.header_nav .header_nav_ul_1 li a{
  text-decoration: none;
  color: white;
  padding: 0 0.3rem;
}
.header_nav .header_nav_ul_1 li.active{
  background: linear-gradient(90deg, #1582BB 0%, #28D8D6 100%);
  -webkit-background-clip: text; /* 仅裁剪文字区域 */
  -webkit-text-fill-color: transparent; /* 让文字本身透明 */
}
.header_nav_ext{
    max-height: 0rem;
    width: 1.6rem;
    box-sizing: border-box;
    text-align: center;
    /*padding: 0.2rem 0 0.28rem 0;*/
    border-radius: 0 0 0.12rem 0.12rem;
    background-color: rgba(17, 45, 54, 1);
    overflow: hidden;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    transition: max-height 0.5s ease;
    list-style: none;
    margin: 0;
    padding: 0;
}
.header_nav_ext li{
    text-align: center;
    margin-top: 0.2rem;
}
.header_nav_ext a{
    text-align: center;
    padding: 0 !important;
}
.header_nav_ext li:nth-last-of-type(1){
    margin-bottom: 0.28rem;
}
.header_nav .header_nav_ul_1 li:hover .header_nav_ext{
  max-height: 2rem;
}
.header_nav .header_nav_ul_2{
  height: 100%;
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}
.header_nav .header_nav_ul_2 li{
  text-decoration: none;
  color: white;
  padding: 0 0.2rem;
  position: relative;
  display: flex;
  align-items: center;
}
.header_nav .header_nav_ul_2 li:hover .header_hover_box{
    display: block;
}
.header_hover_box{
    display: none;
    position: absolute;
    justify-content: center;
    align-items: center;
    z-index: 999;
    transform: translateX(-50%);
    top: 0.4rem;
    left: 50%;
    background-color: white;
    border-radius: 0.14rem;
    color: black;
    box-sizing: border-box;
    padding: 0.05rem 0.1rem;
    white-space: nowrap;
}
.header .qrcode{
  display: none;
  width: 1.77rem;
  height: 1.83rem;
  position: absolute;
  justify-content: center;
  align-items: center;
  z-index: 999;
  transform: translateX(-50%);
  top: 0.4rem;
  left: 50%;
  background-color: white;
  border-radius: 0.14rem;
}
.header_hover_box img{
  width: 1.6rem;
  height: 1.6rem;
}
.header_email{
  margin-left: 0.1rem;
  display: none;
  font-size: 0.16rem;
}
.header_btn{
  width: 1.15rem;
  height: 0.32rem;
  box-sizing: border-box;
  border: 1px solid white;
  border-radius: 0.28rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  color: white;
  text-decoration: none;
}
.header_black{
  width: 1px;
  height: 0.14rem;
  opacity: 0.27;
  background-color: white;
  /* padding: 0 0.2rem; */
}
.header_lang_box{
  /* width: 0.8rem; */
  height: 0.2rem;
  position: relative;
  font-family: 'HarmonyOS Sans SC Regular';
  font-size: 0.16rem;
  line-height: 0.2rem;
  letter-spacing: 0%;
  margin-left: 0.3rem;
  cursor: pointer;
  user-select: none;
}
.cur_lang{
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
}
.cur_text{
  margin: 0 0.1rem 0 0.13rem;
}
.header_lang{
  height: 0rem;
  list-style: none;
  overflow: hidden;
  background-color: #112D36;
  position: absolute;
  top: 120%; 
  left: 50%;
  transition: height 0.5s ease;
  will-change: height;
  box-sizing: border-box;
  padding: 0;
  margin: 0;
  transform: translateX(-50%);
  border-radius: 0 0 0.12rem 0.12rem;
}
.header_lang_box:hover .header_lang,
.header_lang_box:focus-within .header_lang {
  height: 1rem;
}
.header_lang li{
  width: 100%;
  height: 0.5rem;
  text-align: center;
  user-select: none;
  cursor: pointer;
  
}
.header_lang li a {
  display: flex;
  width: 100%;
  height: 100%;
  text-decoration: none;
  color: white;
  box-sizing: border-box;
  padding: 0.1rem 0.3rem;
  align-items: center;
  justify-content: center;
}
.header_lang li a:hover{
  background-color: white;
  color: #112D36;
}