/*
功能说明：定义 AlpsOptics 主题的页头、语言切换和目录树导航样式。
主要职责：控制品牌栏、主导航、搜索框、语言切换和响应式头部布局。
关键依赖：header.php、assets/js/site.js。
*/

.alpsoptics-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--ao-line);
  box-shadow: 0 8px 18px rgba(156, 162, 173, 0.05);
  backdrop-filter: blur(12px);
}

body.alpsoptics-mobile-nav-open {
  overflow: hidden;
}

.alpsoptics-header__inner,
.alpsoptics-header__panel,
.alpsoptics-actions,
.alpsoptics-nav__menu {
  display: flex;
  align-items: center;
  gap: 18px;
}

.alpsoptics-header__inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  justify-content: normal;
  gap: 20px;
  height: var(--ao-header-height);
}

.alpsoptics-header__panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px;
  min-width: 0;
}

.alpsoptics-brand {
  display: inline-flex;
  align-items: center;
  color: var(--ao-text);
  font-weight: 700;
  flex: 0 0 auto;
}

.alpsoptics-brand img.alpsoptics-brand__logo {
  display: block;
  width: auto !important;
  height: 20px !important;
  max-width: none !important;
  object-fit: contain;
  flex: 0 0 auto;
}

.alpsoptics-mobile-toggle,
.alpsoptics-mobile-search,
.alpsoptics-language-switcher--mobile,
.alpsoptics-header__panel-head,
.alpsoptics-nav-panel__mobile-tree,
.alpsoptics-header__backdrop {
  display: none;
}

.alpsoptics-mobile-toggle {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 0;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  color: var(--ao-text);
}

.alpsoptics-mobile-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.alpsoptics-nav {
  margin-left: 6px;
  display: flex;
  align-items: center;
  height: 100%;
}

.alpsoptics-nav__menu {
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 22px;
}

.alpsoptics-nav__item {
  position: relative;
  display: flex;
  align-items: center;
  height: 100%;
}

.alpsoptics-nav__entry {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.alpsoptics-nav__menu a,
.alpsoptics-nav__link,
.alpsoptics-nav__toggle {
  color: var(--ao-text);
  font-size: var(--ao-header-nav-size);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.01em;
  white-space: nowrap;
  text-decoration: none;
}

.alpsoptics-nav__link {
  display: inline-flex;
  align-items: center;
  position: relative;
}

.alpsoptics-nav__link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: #E25E29;
  border-radius: 999px;
  transition: width 0.22s ease, left 0.22s ease;
}

.alpsoptics-nav__link:hover::after {
  width: 100%;
  left: 0;
}

.alpsoptics-nav__toggle {
  appearance: none;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 0;
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ao-muted);
  transition: color 0.18s ease, transform 0.18s ease;
}

.alpsoptics-nav__toggle svg {
  width: 100%;
  height: 100%;
}

.alpsoptics-nav__item--tree.is-open .alpsoptics-nav__link,
.alpsoptics-nav__item--tree.is-open .alpsoptics-nav__toggle {
  color: var(--ao-accent-dark);
}

.alpsoptics-nav__item--tree.is-open .alpsoptics-nav__toggle {
  transform: rotate(180deg);
}

.alpsoptics-actions {
  margin-left: 0;
  justify-content: flex-end;
  gap: 14px;
  flex-wrap: nowrap;
  min-width: 0;
  height: 100%;
}

.alpsoptics-action-link,
.alpsoptics-signin-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ao-text);
  font-size: var(--ao-header-action-size);
  font-weight: 600;
  line-height: 1.1;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 0;
  white-space: nowrap;
}

.alpsoptics-action-link__icon {
  width: var(--ao-header-icon-size);
  height: var(--ao-header-icon-size);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ao-accent-dark);
  flex: 0 0 auto;
}

.alpsoptics-action-link__icon svg,
.alpsoptics-language-switcher__arrow svg {
  width: 100%;
  height: 100%;
}

.alpsoptics-search-form { position: relative; width: clamp(160px, 14vw, 220px); flex: 0 1 auto; min-width: 140px; }
.alpsoptics-search-form__field { display: block; }
.alpsoptics-search-form input[type="search"] { width: 100%; height: 42px; padding: 0 48px 0 16px; border: 1px solid rgba(156, 162, 173, 0.14); border-radius: 8px; background: rgba(255, 255, 255, 0.98); color: var(--ao-text); font-size: 0.95rem; line-height: 1.2; }
.alpsoptics-search-form input[type="search"]::placeholder { color: var(--ao-text); opacity: 1; }
.alpsoptics-search-form__submit { position: absolute; top: 50%; right: 14px; width: 20px; height: 20px; display: grid; place-items: center; transform: translateY(-50%); border: 0; padding: 0; background: transparent; color: var(--ao-muted); cursor: pointer; }
.alpsoptics-search-form__submit svg { width: 100%; height: 100%; }

.alpsoptics-language-switcher {
  position: relative;
}

.alpsoptics-language-switcher--desktop {
  display: inline-flex;
}

.alpsoptics-language-switcher__code {
  display: inline-flex;
  align-items: center;
  color: var(--ao-text);
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.06em;
}

.alpsoptics-language-switcher ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.alpsoptics-language-switcher summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.alpsoptics-language-switcher summary::-webkit-details-marker {
  display: none;
}

.alpsoptics-language-switcher__summary {
  min-height: 32px;
}

.alpsoptics-language-switcher__arrow {
  width: 12px;
  height: 12px;
  transition: transform 0.2s ease;
  flex: 0 0 auto;
}

.alpsoptics-language-switcher[open] .alpsoptics-language-switcher__arrow {
  transform: rotate(180deg);
}

.alpsoptics-language-switcher .alpsoptics-language-switcher__menu {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  width: 172px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  padding: 0;
  overflow: hidden;
  border-radius: 14px;
  border: 1px solid rgba(156, 162, 173, 0.12);
  background: rgba(255, 255, 255, 0.99);
  box-shadow: 0 16px 32px rgba(156, 162, 173, 0.1);
  z-index: 45;
}

.alpsoptics-language-switcher .alpsoptics-language-switcher__menu li {
  list-style: none;
  border-bottom: 1px solid var(--ao-line);
}

.alpsoptics-language-switcher .alpsoptics-language-switcher__menu li:last-child {
  border-bottom: 0;
}

.alpsoptics-language-switcher .alpsoptics-language-switcher__menu a {
  display: flex;
  align-items: center;
  min-height: 58px;
  padding: 0 18px;
  color: #000;
  font-size: 1rem;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.99);
  transition: background-color 0.18s ease, color 0.18s ease;
}

.alpsoptics-language-switcher .alpsoptics-language-switcher__menu a:hover {
  background: rgba(215, 220, 227, 0.12);
  color: var(--ao-text);
}

.alpsoptics-language-switcher .alpsoptics-language-switcher__menu a[aria-current="true"] {
  background: #ececec;
  color: var(--ao-text);
  font-weight: 700;
}

.alpsoptics-cart-count {
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(215, 220, 227, 0.16);
  color: var(--ao-accent-dark);
  font-size: 0.7rem;
  font-weight: 700;
}

.alpsoptics-auth-links {
  display: inline-flex;
  align-items: center;
  gap: 0;
  min-width: 0;
  position: relative;
}
.alpsoptics-auth-menu {
  position: relative;
}
.alpsoptics-auth-menu > summary {
  display: inline-flex;
  align-items: center;
  list-style: none;
  color: var(--ao-accent-dark);
  white-space: nowrap;
}
.alpsoptics-auth-menu > summary::-webkit-details-marker {
  display: none;
}
.alpsoptics-auth-menu[open] > summary {
  color: var(--ao-accent);
}
.alpsoptics-auth-menu__panel {
  position: absolute;
  top: calc(100% + 18px);
  right: 4px;
  width: min(420px, calc(100vw - 32px));
  padding: 28px;
  border: 1px solid rgba(156, 162, 173, 0.14);
  border-bottom: 2px solid var(--ao-accent-dark);
  border-radius: 0 0 18px 18px;
  background: rgba(255, 255, 255, 0.995);
  box-shadow: 0 22px 44px rgba(156, 162, 173, 0.1);
  transform-origin: top right;
  z-index: 48;
}
.alpsoptics-auth-menu__form {
  display: grid;
  gap: 22px;
}
.alpsoptics-auth-menu__field {
  margin: 0;
}
.alpsoptics-auth-menu__field label {
  display: block;
  margin-bottom: 10px;
  color: var(--ao-text);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.3;
}
.alpsoptics-auth-menu__field input {
  width: 100%;
  height: 58px;
  padding: 0 18px;
  border: 1px solid rgba(156, 162, 173, 0.1);
  border-radius: 14px;
  background: #fff;
  color: var(--ao-text);
  font-size: 0.96rem;
  line-height: 1.2;
}
.alpsoptics-auth-menu__field input::placeholder {
  color: #000;
}
.alpsoptics-auth-menu__password {
  position: relative;
  display: block;
  width: 100%;
}
.alpsoptics-auth-menu__password > input {
  display: block;
  width: 100%;
  height: 58px;
  box-sizing: border-box;
  padding-right: 58px;
}
.alpsoptics-auth-menu__toggle {
  position: absolute;
  top: 50%;
  right: 18px;
  width: 24px;
  height: 24px;
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--ao-muted);
  cursor: pointer;
  transform: translateY(-50%);
}
.alpsoptics-auth-menu__toggle svg {
  width: 100%;
  height: 100%;
}
.alpsoptics-auth-menu__submit {
  width: 100%;
  height: 58px;
  min-height: 58px;
  margin-top: 6px;
  border-radius: 14px !important;
  background: var(--ao-button-bg) !important;
  font-size: 1rem !important;
  font-weight: 700 !important;
  letter-spacing: 0;
}
.alpsoptics-auth-menu__verification-link {
  margin: 14px 0 0;
  text-align: center;
}

.alpsoptics-auth-menu__verification-link a {
  color: var(--ao-accent-dark);
  font-size: 0.95rem;
  font-weight: 600;
}

.alpsoptics-auth-menu__links {
  display: grid;
  justify-items: center;
  gap: 14px;
  margin-top: 22px;
  text-align: center;
}
.alpsoptics-auth-menu__secondary-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 18px;
}
.alpsoptics-auth-menu__secondary-links a,
.alpsoptics-auth-menu__register span {
  font-size: 0.98rem;
  line-height: 1.5;
}
.alpsoptics-auth-menu__secondary-links a,
.alpsoptics-auth-menu__register a {
  color: var(--ao-accent-dark);
  font-weight: 500;
}
.alpsoptics-auth-menu__register {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 6px;
  margin: 0;
  color: var(--ao-text);
}
.alpsoptics-auth-menu__register a {
  font-weight: 600;
}
.alpsoptics-auth-menu[open] .alpsoptics-action-link__icon {
  color: var(--ao-accent);
}

.alpsoptics-nav-panel {
  position: absolute;
  left: 0;
  top: calc(100% + 14px);
  width: max-content;
  max-width: min(760px, calc(100vw - 32px));
  background: rgba(255, 255, 255, 0.99);
  border: 1px solid var(--ao-line);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 18px 36px rgba(156, 162, 173, 0.12);
}

.alpsoptics-nav-panel__inner {
  display: grid;
  grid-template-columns: minmax(220px, max-content) minmax(320px, max-content);
  align-items: stretch;
}

.alpsoptics-nav-panel--direct {
  width: max-content;
  min-width: 280px;
  max-width: min(360px, calc(100vw - 32px));
}

.alpsoptics-nav-panel__inner--direct {
  display: block;
}

.alpsoptics-nav-panel__direct-list {
  list-style: none;
  margin: 0;
  padding: 18px 24px;
}

.alpsoptics-nav-panel__direct-list a {
  display: block;
  padding: 14px 0;
  color: var(--ao-text);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.35;
  text-decoration: none;
  border-bottom: 1px solid var(--ao-line);
  transition: color 0.18s ease;
}

.alpsoptics-nav-panel__direct-list li:last-child a {
  border-bottom: 0;
}

.alpsoptics-nav-panel__direct-list a:hover {
  color: var(--ao-accent-dark);
}

.alpsoptics-nav-panel__categories {
  display: grid;
  align-content: start;
  gap: 8px;
  padding: 20px 18px;
  border-right: 1px solid var(--ao-line);
  background: rgba(246, 247, 249, 0.96);
  list-style: none;
  margin: 0;
}

.alpsoptics-nav-panel__category {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 12px 14px;
  border-radius: 14px;
  color: var(--ao-text);
  font-size: 1rem;
  font-weight: 600;
  white-space: nowrap;
  text-decoration: none;
  transition: background-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}

.alpsoptics-nav-panel__category:hover,
.alpsoptics-nav-panel__category.is-active {
  background: rgba(255, 255, 255, 0.98);
  color: var(--ao-accent-dark);
  box-shadow: 0 12px 24px rgba(156, 162, 173, 0.07);
}

.alpsoptics-nav-panel__views {
  padding: 20px 22px;
}

.alpsoptics-nav-panel__view {
  padding: 0;
}

.alpsoptics-nav-panel__product-list {
  display: grid;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.alpsoptics-nav-panel__product-list a {
  display: block;
  padding: 14px 0;
  color: var(--ao-text);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.35;
  border-bottom: 1px solid var(--ao-line);
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.18s ease;
}

.alpsoptics-nav-panel__product-list li:last-child a {
  border-bottom: 0;
}

.alpsoptics-nav-panel__product-list a:hover {
  color: var(--ao-accent-dark);
}

@media (max-width: 920px) {
  .alpsoptics-header {
    position: static;
    box-shadow: none;
    backdrop-filter: none;
  }

  .alpsoptics-header__inner {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 10px;
    min-height: auto;
    height: auto;
    padding: 12px 0;
  }

  .alpsoptics-brand {
    justify-self: start;
  }

  .alpsoptics-brand img.alpsoptics-brand__logo {
    height: 18px !important;
  }

  .alpsoptics-language-switcher--desktop {
    display: none;
  }

  .alpsoptics-language-switcher--mobile {
    display: inline-flex;
    justify-self: center;
    z-index: 43;
  }

  .alpsoptics-language-switcher--mobile summary {
    min-height: 32px;
    gap: 6px;
  }

  .alpsoptics-language-switcher--mobile .alpsoptics-action-link__icon {
    width: 15px;
    height: 15px;
  }

  .alpsoptics-language-switcher--mobile .alpsoptics-language-switcher__menu {
    left: 50%;
    right: auto;
    top: calc(100% + 8px);
    width: 140px;
    transform: translateX(-50%);
    border-radius: 12px;
    box-shadow: 0 14px 28px rgba(156, 162, 173, 0.14);
  }

  .alpsoptics-language-switcher--mobile .alpsoptics-language-switcher__menu a {
    min-height: 48px;
    padding: 0 14px;
    font-size: 0.92rem;
  }

  .alpsoptics-mobile-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-self: end;
    z-index: 43;
    transition: opacity 0.18s ease;
  }

  .alpsoptics-header.is-mobile-nav-open .alpsoptics-mobile-toggle {
    opacity: 0;
    pointer-events: none;
  }

  .alpsoptics-header__panel {
    display: grid;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    grid-column: auto;
    width: min(340px, calc(100vw - 40px));
    grid-template-columns: 1fr;
    align-content: start;
    gap: 0;
    padding: 18px 18px 26px;
    background: rgba(255, 255, 255, 0.995);
    border-right: 1px solid rgba(156, 162, 173, 0.16);
    box-shadow: 22px 0 38px rgba(156, 162, 173, 0.12);
    transform: translateX(-104%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.24s ease, opacity 0.24s ease, visibility 0.24s ease;
    overflow-y: auto;
    z-index: 1280;
  }

  .alpsoptics-header.is-mobile-nav-open .alpsoptics-header__panel {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .alpsoptics-header.is-mobile-nav-open .alpsoptics-mobile-toggle__bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .alpsoptics-header.is-mobile-nav-open .alpsoptics-mobile-toggle__bar:nth-child(2) {
    opacity: 0;
  }

  .alpsoptics-header.is-mobile-nav-open .alpsoptics-mobile-toggle__bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .alpsoptics-header__panel-head {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 6px;
  }

  .alpsoptics-header__panel-close {
    appearance: none;
    border: 0;
    padding: 0;
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: var(--ao-text);
    cursor: pointer;
  }

  .alpsoptics-header__panel-close svg {
    width: 18px;
    height: 18px;
  }

  .alpsoptics-header__backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(17, 19, 24, 0.28);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.24s ease, visibility 0.24s ease;
    z-index: 1270;
  }

  .alpsoptics-header.is-mobile-nav-open .alpsoptics-header__backdrop {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .alpsoptics-mobile-search {
    display: block;
    padding: 8px 0 14px;
  }

  .alpsoptics-mobile-search .alpsoptics-search-form {
    width: 100%;
  }

  .alpsoptics-mobile-search .alpsoptics-search-form input[type="search"] {
    height: 46px;
    padding: 0 56px 0 16px;
    border-radius: 10px;
    border-color: rgba(156, 162, 173, 0.2);
    font-size: 0.92rem;
  }

.alpsoptics-mobile-search .alpsoptics-search-form__submit {
  right: 0;
  top: 0;
  width: 46px;
  height: 46px;
  transform: none;
  border-radius: 0 10px 10px 0;
  background: #E25E29;
  color: #fff;
  z-index: 2;
  pointer-events: auto;
  touch-action: manipulation;
}

  .alpsoptics-mobile-search .alpsoptics-search-form__submit svg {
    width: 18px;
    height: 18px;
  }

  .alpsoptics-nav {
    display: block;
    margin-left: 0;
    height: auto;
  }

  .alpsoptics-nav__menu {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .alpsoptics-nav__item {
    display: block;
    height: auto;
    border-bottom: 1px solid var(--ao-line);
  }

  .alpsoptics-nav__item:last-child {
    border-bottom: 0;
  }

  .alpsoptics-nav__entry {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 40px;
    align-items: center;
    gap: 8px;
    width: 100%;
  }

  .alpsoptics-nav__item > .alpsoptics-nav__link,
  .alpsoptics-nav__link {
    display: block;
    width: 100%;
    padding: 13px 0;
    font-size: 1rem;
  }

  .alpsoptics-nav__toggle {
    display: inline-flex;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    margin-right: -8px;
    border-radius: 999px;
    color: var(--ao-text);
    touch-action: manipulation;
  }

  .alpsoptics-nav__toggle svg {
    width: 16px;
    height: 16px;
    pointer-events: none;
  }

  .alpsoptics-nav-panel {
    position: static;
    top: auto;
    left: auto;
    width: auto;
    max-width: none;
    margin: 0 0 12px;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
  }

  .alpsoptics-nav-panel__inner {
    display: none;
  }

  .alpsoptics-nav-panel--direct {
    min-width: 0;
  }

  .alpsoptics-nav-panel__inner--direct {
    display: block;
  }

  .alpsoptics-nav-panel__direct-list {
    padding: 2px 0 4px 14px;
  }

  .alpsoptics-nav-panel__direct-list a {
    padding: 10px 0;
    font-size: 0.94rem;
    border-bottom-color: rgba(156, 162, 173, 0.12);
  }

  .alpsoptics-nav-panel__mobile-tree {
    display: block;
    padding: 2px 0 4px 14px;
  }

  .alpsoptics-nav-panel__mobile-sections,
  .alpsoptics-nav-panel__mobile-products {
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .alpsoptics-nav-panel__mobile-sections {
    display: grid;
    gap: 10px;
  }

  .alpsoptics-nav-panel__mobile-section {
    display: grid;
    gap: 6px;
  }

  .alpsoptics-nav-panel__mobile-link {
    display: block;
    padding: 2px 0;
    color: var(--ao-text);
    font-size: 0.96rem;
    font-weight: 600;
    line-height: 1.35;
    text-decoration: none;
  }

  .alpsoptics-nav-panel__mobile-products {
    display: grid;
    gap: 0;
    padding-left: 12px;
  }

  .alpsoptics-nav-panel__mobile-products a {
    display: block;
    padding: 8px 0;
    color: var(--ao-text);
    font-size: 0.92rem;
    font-weight: 500;
    line-height: 1.35;
    text-decoration: none;
  }

  .alpsoptics-actions {
    display: none;
  }

  .admin-bar .alpsoptics-header__panel,
  .admin-bar .alpsoptics-header__backdrop {
    top: 46px;
  }
}