.header_box {
  position: relative;
  margin: 0 auto;
  width: 13rem;
  height: 0.8rem;
  font-size: 0.14rem;
}
.header_box .header_left {
  float: left;
  cursor: pointer;
}
.header_box .header_left > img {
  display: inline-block;
  margin-top: 0.24rem;
  margin-right: 0.08rem;
  height: 0.32rem;
}
.header_box .header_left > img.header_logo {
  width: 0.39rem;
}
.header_box .header_left > img.header_title {
  width: 1.35rem;
}
.header_box .header_left .left_white {
  display: inline-block;
}
.header_box .header_left .left_gray {
  display: none;
}
.header_box .header_right {
  float: right;
}
.header_box .header_right > .header_nav_item {
  position: relative;
  float: left;
  margin-left: 0.55rem;
  height: 0.8rem;
  line-height: 0.8rem;
  cursor: pointer;
}
.header_box .header_right > .header_nav_lang {
  position: relative;
  float: left;
  margin-left: 0.55rem;
  height: 0.8rem;
  line-height: 0.8rem;
  cursor: pointer;
}
.header_box .header_right > .header_nav_item > div::after {
  content: "";
  width: 0;
  position: absolute;
  background: #2d8cf0;
  height: 0.04rem;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  -webkit-transform: translateX(-50%);
  transition: all 0.3s ease-out;
  -webkit-transition: all 0.3s ease-out;
}
.header_box .header_right > .header_nav_item:hover > div::after,
.header_box .header_right > .header_nav_item.selected > div::after {
  width: 100%;
}
.header_box .header_right > .header_nav_lang .nav_language_en {
  background-color: #2d8cf0;
  position: absolute;
  top: 0.6rem;
  left: 50%;
  transform: translateX(-50%) translateY(50%);
  -webkit-transform: translateX(-50%) translateY(50%);
  padding: 0.06rem 0;
  -webkit-transition: all 0.2s ease-in-out;
  transition: all 0.2s ease-in-out;
  visibility: hidden;
  opacity: 0;
  z-index: 100;
  text-align: center;
  font-size: 0.14rem;
  line-height: 0.4rem;
  color: #fff;
  border-radius: 0.08rem;
}
.header_box .header_right > .header_nav_lang:hover .nav_language_en {
  display: block;
  visibility: visible;
  transform: translateX(-50%) translateY(0%);
  -webkit-transform: translateX(-50%) translateY(0%);
  opacity: 1;
}
.header_box
  .header_right
  > .header_nav_lang:hover
  .nav_language_en::after {
  border-left: 0.07rem solid transparent;
  border-right: 0.07rem solid transparent;
  border-top: 0.09660254rem solid #2d8cf0;
  width: 0;
  height: 0;
  content: "";
  position: absolute;
  top: -0.08rem;
  left: 50%;
  transform: translateX(-50%) rotate(180deg);
  -webkit-transform: translateX(-50%) rotate(180deg);
}
.header_box .header_right > .header_nav_lang:hover .nav_language_en a {
  color: #fff;
  display: block;
  padding: 0;
  margin: 0 0.12rem;
  transition: all 0.3s ease-out;
  -webkit-transition: all 0.3s ease-out;
  text-decoration: none;
}