/* Shenyun navigation v3 — adapted from the Nimbus click-to-open navigation reference. */
.site-header {
  --nav-brand: #1677ff;
  --nav-brand-deep: #0958d9;
  --nav-ink: #152235;
  --nav-text: #465568;
  --nav-muted: #758397;
  --nav-line: #dfe7f0;
  --nav-soft: #edf5ff;
  position: sticky;
  top: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(18px, 2.5vw, 42px);
  min-height: 74px;
  padding: 10px max(20px, calc((100vw - 1240px) / 2));
  border-bottom: 1px solid color-mix(in srgb, var(--nav-brand) 10%, var(--nav-line));
  background: rgba(248, 251, 255, .9);
  box-shadow: 0 8px 28px rgba(24, 54, 88, .05);
  backdrop-filter: blur(20px) saturate(140%);
  transform: translateY(0);
  transition: transform .28s cubic-bezier(.2, .8, .2, 1), box-shadow .2s ease;
  will-change: transform;
}

.site-header.nav-hidden {
  transform: translateY(calc(-100% - 10px));
  box-shadow: none;
}

.site-header .brand {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  gap: 9px;
  min-height: 48px;
  margin: 0;
}

.site-header .brand-mark {
  width: 52px;
  height: 29px;
  flex: 0 0 52px;
}

.site-header .brand-word strong {
  color: var(--nav-brand);
  font-size: 18px;
  line-height: 1;
  letter-spacing: .12em;
}

.site-header .brand-word small {
  margin-top: 4px;
  color: var(--nav-brand-deep);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: .18em;
}

.site-header .main-nav {
  position: static;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  justify-self: end;
  gap: 3px;
  color: var(--nav-text);
  font-size: 14px;
}

.site-header .main-nav > a,
.site-header .nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 44px;
  padding: 0 11px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: inherit;
  font: inherit;
  font-weight: 550;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: color .18s ease, background-color .18s ease, transform .18s ease;
}

.site-header .main-nav > a::after,
.site-header .nav-dropdown-toggle::before {
  display: none !important;
}

.site-header .main-nav > a:hover,
.site-header .main-nav > a:focus-visible,
.site-header .nav-dropdown-toggle:hover,
.site-header .nav-dropdown-toggle:focus-visible {
  background: rgba(22, 119, 255, .07);
  color: var(--nav-ink);
}

.site-header .main-nav > a[aria-current="page"],
.site-header .nav-dropdown.is-current .nav-dropdown-toggle,
.site-header .nav-dropdown.open .nav-dropdown-toggle {
  background: var(--nav-soft);
  color: var(--nav-brand-deep);
  font-weight: 700;
}

.site-header .nav-dropdown {
  position: relative;
  display: inline-flex;
}

.site-header .nav-dropdown-toggle::after {
  content: "";
  display: block;
  width: 7px;
  height: 7px;
  margin-top: -3px;
  border-right: 1.7px solid currentColor;
  border-bottom: 1.7px solid currentColor;
  transform: rotate(45deg);
  transform-origin: center;
  transition: transform .2s ease;
}

.site-header .nav-dropdown.open .nav-dropdown-toggle::after {
  transform: translateY(3px) rotate(225deg);
}

.site-header .nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  z-index: 120;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  width: min(700px, calc(100vw - 40px));
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--nav-line);
  border-radius: 16px;
  background: #fbfdff;
  box-shadow: 0 22px 56px rgba(23, 49, 79, .16);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, -6px);
  transform-origin: top center;
  transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
}

.site-header .nav-dropdown.open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.site-header .service-menu-heading {
  grid-column: 1 / -1;
  display: grid;
  gap: 4px;
  padding: 2px 4px 8px;
}

.site-header .service-menu-heading strong {
  color: var(--nav-ink);
  font-size: 15px;
  font-weight: 750;
}

.site-header .service-menu-heading span {
  color: var(--nav-muted);
  font-size: 12px;
}

.site-header .nav-dropdown-menu .service-link {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 11px;
  align-items: start;
  min-height: 112px;
  padding: 14px;
  border: 1px solid transparent;
  border-radius: 12px;
  white-space: normal;
  transition: background-color .18s ease, border-color .18s ease, transform .18s ease;
}

.site-header .nav-dropdown-menu .service-link::after { display: none; }
.site-header .nav-dropdown-menu .service-link:hover,
.site-header .nav-dropdown-menu .service-link:focus-visible {
  border-color: rgba(22, 119, 255, .16);
  background: linear-gradient(145deg, #f2f7ff, #f8fbff);
  transform: translateY(-2px);
}

.site-header .service-icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: var(--nav-soft);
  color: var(--nav-brand);
}

.site-header .service-icon svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.site-header .service-copy { display: grid; gap: 5px; }
.site-header .service-copy b {
  color: var(--nav-ink);
  font-size: 14px;
  font-weight: 750;
  line-height: 1.35;
}
.site-header .service-copy small {
  color: var(--nav-muted);
  font-size: 11px;
  line-height: 1.55;
}
.site-header .service-copy em {
  color: var(--nav-brand-deep);
  font-size: 11px;
  font-style: normal;
  font-weight: 700;
}

.site-header .header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  justify-self: end;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: var(--nav-brand);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
  box-shadow: 0 8px 20px rgba(22, 119, 255, .2);
  transition: background-color .18s ease, transform .18s ease, box-shadow .18s ease;
}

.site-header .header-cta:hover,
.site-header .header-cta:focus-visible {
  background: var(--nav-brand-deep);
  transform: translateY(-1px);
  box-shadow: 0 11px 24px rgba(22, 119, 255, .25);
}

.site-header .nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(22, 119, 255, .12);
  border-radius: 10px;
  background: var(--nav-soft);
}

.site-header .nav-toggle span {
  display: block;
  width: 19px;
  height: 2px;
  margin: 4px auto;
  border-radius: 999px;
  background: var(--nav-ink);
  transition: transform .2s ease, opacity .2s ease;
}

.site-header:has(.main-nav.open) .nav-toggle span:first-child { transform: translateY(3px) rotate(45deg); }
.site-header:has(.main-nav.open) .nav-toggle span:last-child { transform: translateY(-3px) rotate(-45deg); }

@media (max-width: 1180px) {
  .site-header {
    grid-template-columns: auto 1fr auto;
    gap: 14px;
    padding-inline: 20px;
  }
  .site-header .main-nav { gap: 1px; font-size: 13px; justify-self: end; }
  .site-header .main-nav > a,
  .site-header .nav-dropdown-toggle { padding-inline: 8px; }
  .site-header .brand-word { display: none; }
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: 1fr auto;
    min-height: 68px;
    padding-block: 9px;
  }
  .site-header .brand-word { display: block; }
  .site-header .nav-toggle { display: block; justify-self: end; }
  .site-header .header-cta { display: none; }
  .site-header .main-nav {
    position: absolute;
    top: calc(100% + 8px);
    right: 16px;
    left: 16px;
    display: none;
    max-height: calc(100vh - 92px);
    overflow: auto;
    padding: 12px;
    border: 1px solid var(--nav-line);
    border-radius: 16px;
    background: #fbfdff;
    box-shadow: 0 22px 56px rgba(23, 49, 79, .16);
  }
  .site-header .main-nav.open { display: grid; gap: 3px; }
  .site-header .main-nav > a,
  .site-header .nav-dropdown-toggle {
    justify-content: space-between;
    width: 100%;
    min-height: 46px;
    padding: 0 13px;
  }
  .site-header .nav-dropdown { display: grid; }
  .site-header .nav-dropdown-menu {
    position: static;
    display: none;
    grid-template-columns: 1fr;
    width: 100%;
    margin-top: 6px;
    padding: 10px;
    border-radius: 13px;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
  }
  .site-header .nav-dropdown.open .nav-dropdown-menu { display: grid; transform: none; }
  .site-header .service-menu-heading { padding: 3px 4px 7px; }
  .site-header .nav-dropdown-menu .service-link {
    grid-template-columns: 36px minmax(0, 1fr);
    min-height: 0;
    padding: 12px;
  }
}

@media (max-width: 520px) {
  .site-header { padding-inline: 16px; }
  .site-header .brand-mark { width: 48px; flex-basis: 48px; }
  .site-header .main-nav { right: 10px; left: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .site-header *,
  .site-header *::before,
  .site-header *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}