.header_box {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  gap: calc(1px + 1rem);
  padding-top: calc(12px + 3rem);
}

.header_logo {
  width: calc(88px + 5rem);
}

.header_logo img {
  width: 100%;
}

.header_nav {
  width: calc(88px + 5rem);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: calc(9px + 2rem);
  margin-top: calc(6px + 2rem);
}

.nav_item {
  font-family: PingFang SC;
  font-weight: 500;
  font-size: calc(8px + 0.5rem);
  color: #333333;
  transition: .3s;

}
.nav_item:hover{
  color: #23B1AF;
  padding-left: calc(0px + 0.5rem);
}

.header_nav .nav_active{
  color: #23B1AF;
  padding-left: calc(0px + 0.5rem);
  transition: .3s;
}

.header_contact {
  width: calc(90px + 5rem);
  line-height: calc(10px + 2rem);
  background: #000000;
  font-family: PingFang SC;
  font-weight: 500;
  font-size: calc(6px + 0.5rem);
  color: #FFFFFF;
  text-align: center;
  margin-top: calc(30px + 2rem);
}

.lang {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: calc(1px + 0.25rem);
}

.lang p {
  font-family: Microsoft YaHei;
  font-weight: 400;
  font-size: calc(6px + 0.5rem);
  color: #919191;
}

.lang p:nth-of-type(2) {
  color: #000000;
}