/* 页头部分样式 */

#site-header {
  background-color: var(--color-white);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 997;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem var(--container-padding);
  max-width: var(--container-width);
  margin: 0 auto;
  position: relative;
  gap: 1rem;
}

.logo {
  height: 60px;
}

.logo img {
  height: 100%;
  width: auto;
}

/*
* 导航
*/
.nav-main {
  display: flex;
  gap: 1rem;
  margin: 0 auto;
}

.nav-item {
  position: relative;
  display: grid;
  align-items: center;
  margin: 0 auto;
  align-content: center;
  justify-content: center;
  text-align: center;
  grid-template-columns: 1fr;
}

.nav-link,
.nav-dropdown a {
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0.5rem;
  white-space: nowrap;
}

.nav-link:after {
  display: none;
}

.nav-item.active .nav-link,
.nav-link:hover,
.nav-dropdown a:hover,
.language-link:hover {
  font-weight: 700;
  color: var(--color-secondary);
}

/* 移动版导航按钮 */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.hamburger {
  display: block;
  position: relative;
  width: 24px;
  height: 18px;
}

.hamburger span {
  position: absolute;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  left: 0;
  transition: all 0.3s ease;
}

.hamburger span:nth-child(1) {
  top: 0;
}

.hamburger span:nth-child(2) {
  top: 8px;
}

.hamburger span:nth-child(3) {
  top: 16px;
}

/* 移动版导航打开状态 */
.mobile-menu-open .hamburger span:nth-child(1) {
  transform: rotate(45deg);
  top: 8px;
}

.mobile-menu-open .hamburger span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-open .hamburger span:nth-child(3) {
  transform: rotate(-45deg);
  top: 8px;
}

/* 导航子菜单 */
.nav-dropdown {
  position: absolute;
  z-index: -1;
  align-content: center;
  text-align: center;
  background-color: #fff;
  border-radius: 8px;
  padding: 1rem;
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.4);
  top: 77px;
  display: grid;
  left: 50%;
  opacity: 0;
  transition: all 0.4s ease;
  transform: translate(-50%, -500px);
}

.nav-item.dropdown .nav-dropdown {
  opacity: 1;
  transform: translate(-50%, 0px);
}

.nav-dropdown a {
  padding: 0.5rem 1.25rem;
  color: var(--color-text-light);
}

.nav-dropdown a:hover {
  background-color: var(--color-background);
  border-radius: 1.5rem;
}

/*
* 顶部右侧按钮组
*/
.right-button {
  display: flex;
  align-content: center;
  justify-content: center;
  gap: 0.5rem;
  position: relative;
}

/* 顶部按钮 */
.language-switcher {
  display: flex;
  position: relative;
}

.language-dropdown {
  display: grid;
  gap: 1rem;
  background-color: var(--color-white);
  position: absolute;
  padding: 1rem;
  min-width: 120px;
  text-align: center;
  top: 76px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  border-radius: 5px;
  right: -100%;
  opacity: 0;
  transform: translateY(-300px);
  transition: all 0.4s ease;
  z-index: -1;
}

.language-switcher.language-show .language-dropdown {
  opacity: 1;
  transform: translateY(0);
}

.language-link {
  display: flex;
  align-content: center;
  justify-content: center;
}

.language-link img {
  width: 16px;
  height: 11px;
  margin: 8px 2px 0 0;
}

.top-button {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: var(--color-primary);
  opacity: 0.2;
  transition: all 0.4s ease;
  overflow: hidden;
}

.top-button:hover {
  opacity: 1;
}

.top-search {
  display: flex;
  position: relative;
}

.search-button {
  width: 40px;
  height: 40px;
  display: grid;
  justify-content: center;
  align-content: center;
  border-radius: 0 5px 5px 0;
  overflow: hidden;
}

.search-form {
  display: flex;
  align-content: center;
  justify-content: center;
  position: absolute;
  z-index: 1;
  opacity: 0;
  top: -100px;
  right: 0;
  transition: all 0.4s ease;
}

.search-show .search-form {
  opacity: 1;
  top: 0;
}

.language-switcher.language-show .top-button {
  opacity: 1;
}

.search-input {
  height: 40px;
  padding: 0 10px;
  border: 1px rgb(8, 10, 83) solid;
  border-radius: 5px 0 0 5px;
  outline: none;
  background-color: var(--color-white);
}

.top-button svg,
.top-button img,
.search-button svg,
.search-button img {
  filter: brightness(0) invert(1);
  max-width: 90%;
  margin: 0 auto;
}

/* 响应式样式 */
@media (max-width: 768px) {
  .mobile-nav-toggle {
    display: block;
  }

  .nav-main {
    position: fixed;
    top: 92px;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: 1.5rem 1.5rem 20rem;
    gap: 1rem;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.4s ease-in-out;
    height: 100%;
    overflow: scroll;
  }

  .mobile-menu-open .nav-main {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .mobile-menu-open .nav-item {
    border-top: 1px var(--color-border) solid;
    padding-top: 1rem;
    min-width: 75%;
  }

  .mobile-menu-open .nav-item:first-child {
    border-top: unset;
  }

  .nav-link {
    margin: 0 auto;
    font-size: 1.25rem;
    letter-spacing: 5px;
    padding: unset;
  }

  .language-switcher .language-button {
    display: none;
  }

  .top-search .search-taggle {
    display: none;
  }

  .top-search .search-form {
    display: flex;
    opacity: 0;
    position: fixed;
    bottom: -100px;
    top: unset;
    margin: 0 auto;
    left: 0;
  }

  .mobile-menu-open .top-search .search-form {
    opacity: 1;
    bottom: 104px;
  }

  .mobile-menu-open .search-input {
    min-width: 60%;
  }

  .language-switcher .language-dropdown {
    border-radius: unset;
    box-shadow: unset;
    display: flex;
    position: fixed;
    bottom: -100px;
    top: unset;
    left: 0;
    right: 0;
    transform: unset;
    align-content: center;
    justify-content: center;
    z-index: 1;
    padding: 1.5rem 1rem;
    gap: 1.5rem;
    background-color: var(--color-background);
  }

  .mobile-menu-open .language-dropdown {
    opacity: 1;
    bottom: 0px;
    display: flex;
  }

  .mobile-menu-open .nav-dropdown {
    position: unset;
    z-index: unset;
    box-shadow: unset;
    left: unset;
    opacity: unset;
    transform: unset;
    padding: unset;
    border-radius: unset;
    margin: 0.5rem auto 0;
  }

  .nav-dropdown a {
    font-size: 1.05rem;
  }
}

@media (max-width:1280px) {
  .header-container {
    max-width: 90%;
  }
}