* {
  margin: 0;
  padding: 0;
}

.header_box {
  width: 100%;
  padding: calc(6px + 1rem) 0;
  background-color: #ffffff;
}

.header {
  max-width: 1640px;
  width: 90%;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header_logo {
 
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: calc(2px + 1.5rem);
}

.header_logo img {
  width: max-content;
  height: calc(8px + 3rem);
}

.header_right {
  flex: 1;
  height: 100%;
  display: flex;
  justify-content: flex-end;
  align-items: center;
}

.header_nav{
  height: 100%;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: calc(9px + 3rem);
}
.header_nav_item{
font-family: Source Han Sans, Source Han Sans;
font-weight: 400;
font-size: calc(10px + 0.5rem);
color: #333333;
line-height: calc(9px + 1rem);
}

.header_nav_item_act{
 color: #0054AC;
}
.language{
  font-family: Source Han Sans, Source Han Sans;
  font-weight: 400;
  font-size: calc(10px + 0.5rem);
  color: #333333;
  line-height: calc(9px + 1rem);
  margin-left: calc(8px + 3rem);
}
.language img{
  width: calc(4px + 1rem);
}

.search{
  margin-left: calc(8px + 3rem);
  position: relative;
  cursor: pointer;
}
.search img{
  width: calc(4px + 1rem);
}

.search_input{
    width: calc(80px + 5rem);
    height: calc(10px + 1rem);
    border: 1px #ffffff solid;
    position: absolute;
    right: calc(10px + 1rem);
    top: 0;
    bottom: 0;
    width: 0;
    overflow: hidden;
    transition: .5s;
}
.search_input input{
    
    width: 100%;
    height: 100%;
    border: none;
    outline: medium;
    margin: auto;
    padding: 0 calc(5px + 0.25rem);
}
.search:hover .search_input{
    width: calc(80px + 5rem);
    border: 1px #dadada solid;
}