/* 悬浮导航沿用各页原有占位，正文位置保持稳定。 */
header.site-header {
  --navigation-height: 100px;
  --navigation-top: 20px;
  --navigation-bottom: 4px;
  height: var(--navigation-height);
  width: calc(100% - 112px);
  max-width: 1440px;
  margin: 0 auto;
  padding: var(--navigation-top) 32px var(--navigation-bottom);
  border: 0;
  background: transparent;
  gap: 28px;
  justify-content: flex-start;
  isolation: isolate;
}
header.site-header::before {
  content: "";
  position: absolute;
  inset: var(--navigation-top) 0 var(--navigation-bottom);
  z-index: -1;
  border: 1px solid #dedbd3;
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 8px 28px #2424220a;
}
.home-page > header.site-header {
  --navigation-height: 98px;
  --navigation-bottom: 2px;
}
header.site-header .brand { gap: 12px; font-size: 25px; }
header.site-header .brand svg { width: 36px; height: 36px; }
header.site-header .brand .brand-mark { display: block; width: 56px; height: auto; flex-shrink: 0; }
header.site-header nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin: 0 auto;
  font-size: 16px;
  white-space: nowrap;
}
header.site-header nav a { padding: 9px 0; }
header.site-header nav a.active { color: #bd2d2d; }
header.site-header nav a.active::after {
  left: 50%;
  bottom: 0;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #bd2d2d;
  transform: translateX(-50%);
}
header.site-header .header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  min-width: 116px;
  margin: 0;
  padding: 10px 22px;
  border: 1px solid #bd2d2d;
  border-radius: 6px;
  background: #bd2d2d;
  color: #fff;
  font-size: 16px;
  line-height: 1.4;
  white-space: nowrap;
}
header.site-header .header-cta:hover { background: #992323; border-color: #992323; }
header.site-header .header-cta[aria-current="page"] { color: #fff; border-color: #bd2d2d; }
header.site-header .header-cta span { display: none; }
header.site-header .menu-toggle { display: none; }

@media (min-width: 1600px) {
  .home-page > header.site-header {
    --navigation-height: 112px;
    --navigation-bottom: 16px;
  }
}
@media (max-width: 1150px) {
  header.site-header {
    --navigation-top: 14px;
    --navigation-bottom: 14px;
    width: calc(100% - 64px);
    padding-right: 20px;
    padding-left: 20px;
    gap: 16px;
  }
  .home-page > header.site-header { --navigation-bottom: 12px; }
  header.site-header .brand { gap: 10px; font-size: 22px; }
  header.site-header .brand svg { width: 32px; height: 32px; }
  header.site-header .brand .brand-mark { width: 50px; }
  header.site-header nav { gap: 18px; }
  header.site-header .header-cta { min-width: 98px; padding: 10px 16px; font-size: 15px; }
}
@media (max-width: 1000px) {
  header.site-header {
    --navigation-height: 86px;
    --navigation-top: 12px;
    --navigation-bottom: 8px;
  }
  .home-page > header.site-header {
    --navigation-height: 98px;
    --navigation-bottom: 20px;
  }
}
@media (max-width: 1280px) {
  header.site-header {
    --navigation-height: 78px;
    --navigation-top: 10px;
    --navigation-bottom: 8px;
    width: calc(100% - 32px);
    padding-right: 20px;
    padding-left: 20px;
  }
  .home-page > header.site-header {
    --navigation-height: 82px;
    --navigation-bottom: 12px;
  }
  header.site-header .menu-toggle { display: block; margin-left: auto; font-size: 15px; }
  header.site-header .header-cta { display: none; }
  header.site-header .mobile-contact-link { display: block; }
  header.site-header nav {
    display: none;
    position: absolute;
    top: calc(100% - var(--navigation-bottom) + 8px);
    left: 0;
    width: 100%;
    max-height: calc(100dvh - 98px);
    margin: 0;
    padding: 20px;
    border: 1px solid #dedbd3;
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 8px 28px #2424220a;
    flex-direction: column;
    align-items: stretch;
    gap: 18px;
    overflow-y: auto;
    font-size: 16px;
  }
  header.site-header nav.open { display: flex; }
  header.site-header nav a { padding: 6px 12px; }
  header.site-header nav a.active::after {
    left: 0;
    top: 50%;
    bottom: auto;
    transform: translateY(-50%);
  }
}
@media (max-width: 700px) {
  .home-page > header.site-header {
    --navigation-height: 78px;
    --navigation-bottom: 8px;
  }
  header.site-header { padding-right: 16px; padding-left: 16px; }
  header.site-header .brand { font-size: 21px; }
  header.site-header .brand svg { width: 29px; height: 29px; }
  header.site-header .brand .brand-mark { width: 44px; }
}