/*
 * 三站主导航规范（以唐诚资质为基准，fiscal / licensing / overseas 共用）
 *
 * 结构（SitePage.vue + CatalogBranch.vue）：
 *   logo → 32px → 主导航 →（margin-left:auto）搜索框 → 业务咨询 →（≤1000px）汉堡菜单
 * 主导航项：首页 | 各根栏目（有子栏目则悬停展开）| 最新资讯 | 关于我们
 *
 * 尺寸与样式：
 *   - 顶栏固定吸顶：sticky + top:0，页面滚动时导航不随内容滑走
 *   - 顶栏高 72px（≤1000px 为 64px），白底，底边 #e6eaef
 *   - Logo 高度 20px（等比例）
 *   - 品牌与主导航间距 32px（≤1180px 同为 32px）
 *   - 导航项：PingFang SC / 15px / 400，色 #252d39，间距 32px；悬停/当前页/展开 var(--nav-accent)
 *   - 桌面二级菜单：鼠标悬停即展开，移出后收起（CSS :hover/:focus-within；细指针下 summary 点击不切换）
 *   - 下拉三角：5×5 细线 chevron（#b0b8c4），展开/悬停旋转并变 var(--nav-accent）；禁用 summary::after
 *   - 下拉面板：全宽贴顶栏底，左栏 260px 灰底介绍 + 右栏三列子栏目；无「查看全部」
 *   - 子栏目行：首字主题色方标 + 全称；悬停浅主题色底，右侧可出现 ↗
 *   - 搜索：常显 188×40，圆角 8px，边框 #e6eaef；图标 /assets/shared/search-icon.png 18px（容纳「搜索文章标题」）
 *   - 业务咨询：40px 高，内边距 0 20px，圆角 8px，实心 var(--nav-accent) / 白字 15/400
 *   - ≤1000px 隐藏桌面主导航，显示汉堡与移动面板
 *
 * 实现文件：本 CSS（最后加载）覆盖各站 site.css 旧顶栏规则；勿在 site.css 再改顶栏。
 */

.fiscal-website .site-header,
.licensing-website .site-header,
.overseas-website .site-header,
.site-header {
  --nav-accent: #2978ff;
  --nav-assist: #ea5514;
  --nav-ink: #252d39;
  --nav-muted: #8a93a3;
  --nav-line: #e6eaef;
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--nav-line);
  box-shadow: 0 2px 12px #1c34460a;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
.fiscal-website .site-header .header-inner,
.licensing-website .site-header .header-inner,
.overseas-website .site-header .header-inner,
.site-header .header-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0;
  min-height: 72px;
  padding-block: 0;
}
.site-header .brand {
  display: flex;
  align-items: center;
  flex: none;
  min-width: 0;
}
.site-header .brand img {
  width: auto;
  height: 20px;
  max-width: none;
  max-height: 20px;
  object-fit: contain;
}
.site-header .primary-nav {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex: 1;
  min-width: 0;
  margin-left: 32px;
  gap: 32px;
  overflow: visible;
}
.site-header .primary-nav > a,
.site-header .nav-group > summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 72px;
  padding: 0;
  color: #252d39;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 15px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  white-space: nowrap;
  cursor: pointer;
  background: none;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}
.site-header .primary-nav > a:last-child {
  min-height: 72px;
  padding-inline: 0;
  border-radius: 0;
  background: none;
  color: #252d39;
  font-weight: 400;
}
.site-header .primary-nav > a:last-child:hover {
  background: none;
  color: var(--nav-accent);
}
.site-header .primary-nav > a:hover,
.site-header .nav-group > summary:hover,
.site-header .nav-group:focus-within > summary,
.site-header .nav-group[open] > summary,
.site-header .primary-nav > a[aria-current=page] {
  color: var(--nav-accent);
}
.site-header .nav-group {
  position: static;
}
.site-header .nav-group > summary {
  list-style: none;
  cursor: pointer;
}
.site-header .nav-group > summary::-webkit-details-marker,
.site-header .nav-group > summary::after,
.fiscal-website .site-header .nav-group > summary::after,
.licensing-website .site-header .nav-group > summary::after,
.overseas-website .site-header .nav-group > summary::after {
  display: none !important;
  content: none !important;
}
.nav-chevron {
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-left: 3px;
  margin-top: -2px;
  border-right: 1px solid #b0b8c4;
  border-bottom: 1px solid #b0b8c4;
  background: none;
  -webkit-mask: none;
  mask: none;
  transform: rotate(45deg);
  transition: transform .2s ease, border-color .2s ease;
  vertical-align: middle;
}
.site-header .nav-group:hover > summary .nav-chevron,
.site-header .nav-group:focus-within > summary .nav-chevron,
.site-header .nav-group[open] > summary .nav-chevron {
  margin-top: 2px;
  border-color: var(--nav-accent);
  transform: rotate(225deg);
}
.site-header .nav-submenu {
  position: absolute;
  z-index: 35;
  top: 100%;
  left: 0;
  right: 0;
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  width: 100%;
  max-height: min(68vh, 540px);
  min-width: 0;
  margin: 0;
  padding: 0;
  overflow: auto;
  border: 1px solid var(--nav-line);
  border-radius: 0 0 14px 14px;
  background: #fff;
  box-shadow: 0 18px 40px #1d2e4b18;
}
/* closed details 仍可能留下窄幽灵盒，显式隐藏；展开由 hover 脚本设置 open */
.site-header .nav-group:not([open]) > .nav-submenu,
.fiscal-website .site-header .nav-group:not([open]) > .nav-submenu,
.licensing-website .site-header .nav-group:not([open]) > .nav-submenu,
.overseas-website .site-header .nav-group:not([open]) > .nav-submenu {
  display: none !important;
}
.site-header .nav-group[open] > .nav-submenu,
.fiscal-website .site-header .nav-group[open] > .nav-submenu,
.licensing-website .site-header .nav-group[open] > .nav-submenu,
.overseas-website .site-header .nav-group[open] > .nav-submenu {
  display: grid !important;
}
@media (hover: hover) and (pointer: fine) {
  .site-header .primary-nav .nav-group:hover > summary,
  .fiscal-website .site-header .primary-nav .nav-group:hover > summary,
  .licensing-website .site-header .primary-nav .nav-group:hover > summary,
  .overseas-website .site-header .primary-nav .nav-group:hover > summary {
    color: var(--nav-accent);
  }
}
.site-header .nav-submenu-intro {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  text-align: left;
  min-height: 220px;
  padding: 28px 26px;
  background: #f7f8fa;
}
.site-header .nav-submenu-eyebrow {
  display: block;
  width: 100%;
  color: var(--nav-accent);
  font-size: 12px;
  font-weight: 600;
  text-align: left;
}
.site-header .nav-submenu-intro strong {
  display: block;
  width: 100%;
  margin-top: 12px;
  color: #273247;
  font-size: 22px;
  font-weight: 600;
  text-align: left;
}
.site-header .nav-submenu-intro p {
  display: block;
  width: 100%;
  margin: 12px 0 24px;
  color: #748096;
  font-size: 13px;
  line-height: 1.7;
  text-align: left;
}
.site-header .nav-submenu-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-content: start;
  gap: 6px 14px;
  padding: 26px 30px;
}
.site-header .nav-submenu-links > a {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  min-height: 48px;
  padding: 8px 10px;
  border-radius: 8px;
  color: #303c50;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.35;
}
.site-header .nav-submenu-links > a:hover,
.site-header .nav-submenu-links > a:focus-visible {
  background: color-mix(in srgb, var(--nav-accent) 10%, #fff);
  color: var(--nav-accent);
}
.nav-submenu-icon {
  display: grid;
  place-items: center;
  flex: none;
  width: 28px;
  height: 28px;
  border-radius: 7px;
  clip-path: none;
  background: var(--nav-accent);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
}
.nav-submenu-arrow {
  margin-left: auto;
  color: #9ba9c1;
  font-size: 13px;
  opacity: 0;
  transition: opacity .18s ease;
}
.nav-submenu-links > a:hover .nav-submenu-arrow,
.nav-submenu-links > a:focus-visible .nav-submenu-arrow {
  opacity: 1;
  color: var(--nav-accent);
}

.site-header .header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex: none;
  margin-left: auto;
  gap: 16px;
}

/* Always-visible search field */
.site-header .header-search {
  position: relative;
  display: flex;
  align-items: center;
  flex: none;
  width: 188px;
  height: 40px;
  margin: 0;
  padding: 0 6px 0 14px;
  border: 1px solid var(--nav-line);
  border-radius: 8px;
  background: #fff;
  box-shadow: none;
}
.site-header .header-search:focus-within {
  border-color: var(--nav-accent);
}
.site-header .header-search > summary {
  display: none;
}
.site-header .header-search-panel,
.site-header form.header-search {
  display: flex;
  align-items: center;
  gap: 4px;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}
.site-header .header-search input {
  flex: 1;
  width: 100%;
  min-width: 0;
  height: 36px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--nav-ink);
  font-size: 14px;
  font-weight: 400;
  line-height: 1;
}
.site-header .header-search input::placeholder {
  color: var(--nav-muted);
}
.site-header .header-search button {
  display: grid;
  place-items: center;
  flex: none;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--nav-ink);
  box-shadow: none;
  cursor: pointer;
}
.site-header .header-search button:hover {
  background: #fff4ef;
  color: var(--nav-accent);
  transform: none;
}
.header-search-icon {
  display: block;
  width: 18px;
  height: 18px;
  object-fit: contain;
  border: 0;
  background: none;
}

.site-header .header-consultation {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  min-height: 40px;
  padding: 0 20px;
  border: 1px solid var(--nav-accent);
  border-radius: 8px;
  background: var(--nav-accent);
  color: #fff;
  font-size: 15px;
  font-weight: 400;
  line-height: 1;
  white-space: nowrap;
  box-shadow: none;
}
.site-header .header-consultation:hover {
  background: #d44a10;
  border-color: #d44a10;
  color: #fff;
}
.site-header .header-consultation span {
  display: none;
}

.mobile-nav {
  display: none;
}

@media (max-width: 1180px) {
  .site-header .primary-nav {
    margin-left: 32px;
    gap: 32px;
  }
  .site-header .header-search {
    width: 168px;
  }
}

@media (max-width: 1000px) {
  .site-header .header-inner {
    gap: 12px;
    min-height: 64px;
  }
  .site-header .primary-nav {
    display: none;
  }
  .site-header .header-actions {
    gap: 10px;
  }
  .site-header .header-search {
    width: min(42vw, 180px);
    height: 36px;
  }
  .site-header .header-consultation {
    min-height: 36px;
    padding-inline: 14px;
    font-size: 14px;
  }
  .site-header .mobile-nav {
    display: block;
  }
  .site-header .mobile-nav > summary {
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    list-style: none;
    border-radius: 8px;
    color: var(--nav-ink);
    cursor: pointer;
  }
  .site-header .mobile-nav > summary::-webkit-details-marker {
    display: none;
  }
  .site-header .mobile-nav > summary:hover,
  .site-header .mobile-nav[open] > summary {
    background: #fff4ef;
    color: var(--nav-accent);
  }
  .site-header .mobile-nav > summary span,
  .site-header .mobile-nav > summary span::before,
  .site-header .mobile-nav > summary span::after {
    display: block;
    width: 18px;
    height: 1.5px;
    border-radius: 2px;
    background: currentColor;
  }
  .site-header .mobile-nav > summary span {
    position: relative;
  }
  .site-header .mobile-nav > summary span::before,
  .site-header .mobile-nav > summary span::after {
    position: absolute;
    left: 0;
    content: "";
  }
  .site-header .mobile-nav > summary span::before {
    top: -6px;
  }
  .site-header .mobile-nav > summary span::after {
    top: 6px;
  }
  .site-header .mobile-nav-panel {
    position: absolute;
    z-index: 35;
    top: 100%;
    left: 0;
    right: 0;
    display: grid;
    gap: 2px;
    max-height: calc(100vh - 75px);
    padding: 14px;
    overflow-y: auto;
    border: 1px solid var(--nav-line);
    border-radius: 0 0 14px 14px;
    background: #fff;
    box-shadow: 0 18px 35px #1d2e4b18;
  }
  .site-header .mobile-nav-panel > a,
  .site-header .mobile-nav-group > summary {
    display: block;
    min-height: 42px;
    padding: 10px 12px;
    border-radius: 8px;
    color: #303c50;
    font-size: 15px;
    font-weight: 400;
    line-height: 1.5;
    cursor: pointer;
  }
  .site-header .mobile-nav-panel > a:hover,
  .site-header .mobile-nav-group > summary:hover {
    background: #fff4ef;
    color: var(--nav-accent);
  }
  .site-header .mobile-nav-group > summary {
    list-style: none;
  }
  .site-header .mobile-nav-group > summary::-webkit-details-marker {
    display: none;
  }
  .site-header .mobile-nav-group > summary::after {
    content: "";
    float: right;
    width: 6px;
    height: 6px;
    margin-top: 8px;
    border-right: 1px solid currentColor;
    border-bottom: 1px solid currentColor;
    transform: rotate(45deg);
  }
  .site-header .mobile-nav-group[open] > summary::after {
    margin-top: 12px;
    transform: rotate(225deg);
  }
  .site-header .mobile-nav-group > div {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 5px;
    padding: 6px 12px 12px;
  }
  .site-header .mobile-nav-group a {
    display: block;
    padding: 9px 10px;
    border-radius: 7px;
    background: #f7f9fc;
    color: #586579;
    font-size: 12px;
    line-height: 1.4;
  }
  .site-header .mobile-nav-group a:hover {
    background: #fff4ef;
    color: var(--nav-accent);
  }
}

@media (max-width: 430px) {
  .site-header .brand img {
    height: 18px;
    max-height: 18px;
  }
  .site-header .header-search {
    width: 112px;
    padding-left: 10px;
  }
  .site-header .header-consultation {
    padding-inline: 12px;
    font-size: 13px;
  }
}

/* Beat per-site legacy header rules (licensing/overseas site.css). */
.fiscal-website .site-header .primary-nav,
.licensing-website .site-header .primary-nav,
.overseas-website .site-header .primary-nav {
  margin-left: 32px;
  gap: 32px;
  justify-content: flex-start;
}
.fiscal-website .site-header .brand img,
.licensing-website .site-header .brand img,
.overseas-website .site-header .brand img {
  width: auto;
  height: 20px;
  max-width: none;
  max-height: 20px;
}
.fiscal-website .site-header .primary-nav > a,
.fiscal-website .site-header .nav-group > summary,
.licensing-website .site-header .primary-nav > a,
.licensing-website .site-header .nav-group > summary,
.overseas-website .site-header .primary-nav > a,
.overseas-website .site-header .nav-group > summary {
  min-height: 72px;
  color: #252d39;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}
.fiscal-website .site-header,
.licensing-website .site-header,
.overseas-website .site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
.fiscal-website .site-header .primary-nav > a:hover,
.fiscal-website .site-header .nav-group > summary:hover,
.fiscal-website .site-header .nav-group[open] > summary,
.fiscal-website .site-header .primary-nav > a[aria-current=page],
.licensing-website .site-header .primary-nav > a:hover,
.licensing-website .site-header .nav-group > summary:hover,
.licensing-website .site-header .nav-group[open] > summary,
.licensing-website .site-header .primary-nav > a[aria-current=page],
.overseas-website .site-header .primary-nav > a:hover,
.overseas-website .site-header .nav-group > summary:hover,
.overseas-website .site-header .nav-group[open] > summary,
.overseas-website .site-header .primary-nav > a[aria-current=page] {
  color: var(--nav-accent);
}
.fiscal-website .site-header .header-search,
.licensing-website .site-header .header-search,
.overseas-website .site-header .header-search {
  display: flex;
  align-items: center;
  flex: none;
  flex-basis: auto;
  width: 188px;
  height: 40px;
  margin: 0;
  padding: 0 6px 0 14px;
  overflow: visible;
  border: 1px solid var(--nav-line);
  border-radius: 8px;
  background: #fff;
  box-shadow: none;
}
.fiscal-website .site-header .header-search::before,
.fiscal-website .site-header .header-search::after,
.licensing-website .site-header .header-search::before,
.licensing-website .site-header .header-search::after,
.overseas-website .site-header .header-search::before,
.overseas-website .site-header .header-search::after {
  display: none;
  content: none;
}
.fiscal-website .site-header .header-search button,
.licensing-website .site-header .header-search button,
.overseas-website .site-header .header-search button {
  display: grid;
  place-items: center;
  flex: none;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  border-radius: 6px;
  background: transparent;
  box-shadow: none;
  color: var(--nav-ink);
  font-weight: 400;
  transform: none;
}
.fiscal-website .site-header .header-search button:hover,
.licensing-website .site-header .header-search button:hover,
.overseas-website .site-header .header-search button:hover {
  background: #fff4ef;
  color: var(--nav-accent);
  transform: none;
  box-shadow: none;
}
.fiscal-website .site-header .header-search-icon,
.licensing-website .site-header .header-search-icon,
.overseas-website .site-header .header-search-icon {
  display: block;
  width: 18px;
  height: 18px;
  object-fit: contain;
}
.fiscal-website .site-header .header-consultation,
.licensing-website .site-header .header-consultation,
.overseas-website .site-header .header-consultation {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
  min-height: 40px;
  padding: 0 20px;
  border: 1px solid var(--nav-accent);
  border-radius: 8px;
  background: var(--nav-accent);
  color: #fff;
  font-size: 15px;
  font-weight: 400;
  box-shadow: none;
}
.fiscal-website .site-header .header-actions,
.licensing-website .site-header .header-actions,
.overseas-website .site-header .header-actions {
  display: flex;
  align-items: center;
  flex: none;
  margin-left: auto;
  gap: 16px;
}
.fiscal-website .site-header .nav-submenu,
.licensing-website .site-header .nav-submenu,
.overseas-website .site-header .nav-submenu {
  left: 0;
  right: 0;
  width: 100%;
  grid-template-columns: 260px minmax(0, 1fr);
}
@media (max-width: 1180px) {
  .licensing-website .site-header .primary-nav {
    margin-left: 32px;
    gap: 32px;
  }
}
@media (max-width: 1000px) {
  .fiscal-website .site-header .primary-nav,
  .licensing-website .site-header .primary-nav,
  .overseas-website .site-header .primary-nav {
    display: none;
  }
}

/* Fiscal: slightly tighter than the 32px baseline. */
.fiscal-website .site-header .primary-nav {
  margin-left: 28px;
  gap: 26px;
}
@media (max-width: 1180px) {
  .fiscal-website .site-header .primary-nav {
    margin-left: 24px;
    gap: 22px;
  }
}

/* Overseas: denser spacing only — keep 15px type (more root catalogs). */
.overseas-website .site-header .primary-nav {
  margin-left: 26px;
  gap: 24px;
}
.overseas-website .site-header .primary-nav > a,
.overseas-website .site-header .nav-group > summary {
  gap: 4px;
}
.overseas-website .site-header .nav-chevron {
  width: 4px;
  height: 4px;
  margin-left: 2px;
}
.overseas-website .site-header .header-actions {
  gap: 12px;
}
.overseas-website .site-header .header-consultation {
  padding: 0 14px;
}
@media (max-width: 1180px) {
  .overseas-website .site-header .primary-nav {
    margin-left: 20px;
    gap: 20px;
  }
}

/* Keep the mobile shell from widening full-bleed pages. */
@media (max-width: 1000px) {
  :is(.fiscal-website,.licensing-website,.overseas-website) .site-header .header-inner {
    min-height:64px;
    flex-wrap:nowrap;
    gap:12px;
  }
  :is(.fiscal-website,.licensing-website,.overseas-website) .site-header .header-actions {gap:10px;min-width:0}
  :is(.fiscal-website,.licensing-website,.overseas-website) .site-header .header-search {width:min(26vw,180px);height:36px}
  :is(.fiscal-website,.licensing-website,.overseas-website) .site-header .header-consultation {min-height:36px;padding-inline:14px;font-size:14px}
}
@media (max-width: 600px) {
  :is(.fiscal-website,.licensing-website,.overseas-website) .site-header .header-inner {flex-wrap:wrap;padding-block:8px;gap:6px}
  :is(.fiscal-website,.licensing-website,.overseas-website) .site-header .header-actions {flex:0 0 100%;width:100%;margin-left:0;gap:10px}
  :is(.fiscal-website,.licensing-website,.overseas-website) .site-header .header-search {flex:1;min-width:0;width:auto}
}