.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 2.75rem;
  width: 100%;
  padding-right: 0.9375rem;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
}
.header-logo {
  width: 7.4688rem;
  height: 2.625rem;
}

.header-right {
  display: flex;
  align-items: center;
}
.header-right .header-language {
  font-size: 0.8125rem;
  font-weight: 400;
  color: #999999;
  user-select: none;
}
.header-right .header-language > .current {
  color: #1e55a6;
}
.header-right .header-menu {
  width: 1rem;
  height: 1rem;
  margin-left: 0.625rem;
}

.header-nav {
  height: calc(100vh - 2.75rem);
  overflow: hidden;
  position: fixed;
  transition: height 0.25s;
  top: 2.75rem;
  left: 0;
  right: 0;
  z-index: 1000;
  border-top: 0.0625rem solid rgba(151, 151, 151, 0.1);
  display: none;
  background-color: #fff;
}
.header-nav > a {
  font-size: 1rem;
  font-weight: 400;
  color: rgba(34, 34, 34, 0.8);
  text-decoration: none;
  height: 2.75rem;
  padding: 0 0.9375rem;
  border-top: 0.0625rem solid rgba(151, 151, 151, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.header-nav > a .current {
  color: #1d52a2;
}
.header-nav > a .icon {
  display: block;
  width: 1rem;
  text-align: center;
}