/* jobsitesys 顶部导航 — 与 jobsitesys/index.html 视觉一致，scoped 避免与 Bootstrap 冲突 */
.site-header {
  --bg: #f7f6f3;
  --text: #1a1a1a;
  --muted: #5f5f5f;
  --line: #e5e1d8;
  --primary: #3c8dbc;
  --primary-dark: #367fa9;
  --max: 1120px;
  position: sticky;
  top: 0;
  z-index: 1050;
  background: rgba(247, 246, 243, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  font-family: "Manrope", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  overflow: visible;
}

.site-header .site-nav {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  overflow: visible;
}

.site-header .logo {
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  color: var(--primary);
  text-decoration: none;
}

.site-header .nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
  align-items: center;
}

.site-header .nav-links > li {
  position: relative;
  float: none;
}

.site-header .nav-links a {
  color: inherit;
  text-decoration: none;
}

.site-header .nav-links a:hover {
  color: var(--text);
}

.site-header .nav-item.has-menu > .nav-trigger {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 0;
  cursor: pointer;
  color: var(--muted);
  transition: color .25s;
  background: none;
  border: 0;
  font: inherit;
  font-weight: 500;
}

.site-header .nav-item.has-menu > .nav-trigger .nav-trigger-label {
  position: relative;
  padding: 4px 0;
}

.site-header .nav-item.has-menu > .nav-trigger .nav-trigger-label::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .28s ease;
}

.site-header .nav-item.has-menu:hover > .nav-trigger .nav-trigger-label::after,
.site-header .nav-item.has-menu:focus-within > .nav-trigger .nav-trigger-label::after {
  transform: scaleX(1);
}

.site-header .nav-item.has-menu > .nav-trigger::after {
  display: none;
}

.site-header .nav-item.has-menu > .nav-trigger .nav-chevron {
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  opacity: .55;
  transition: transform .25s, opacity .25s;
  flex-shrink: 0;
}

.site-header .nav-item.has-menu:hover > .nav-trigger,
.site-header .nav-item.has-menu:focus-within > .nav-trigger {
  color: var(--text);
}

.site-header .nav-item.has-menu:hover > .nav-trigger .nav-chevron,
.site-header .nav-item.has-menu:focus-within > .nav-trigger .nav-chevron {
  transform: rotate(180deg);
  opacity: 1;
}

.site-header .nav-dropdown {
  position: absolute;
  top: calc(100% + 18px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  width: min(860px, calc(100vw - 32px));
  padding: 28px 8px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 20px 50px rgba(26, 26, 26, .1);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .22s ease, transform .22s ease, visibility .22s;
  z-index: 60;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.site-header .nav-dropdown::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -20px;
  height: 20px;
}

.site-header .nav-item.has-menu:hover > .nav-dropdown,
.site-header .nav-item.has-menu:focus-within > .nav-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.site-header .mega-col {
  padding: 4px 22px 8px;
  border-right: 1px solid var(--line);
}

.site-header .mega-col:last-child {
  border-right: 0;
}

.site-header .mega-col-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #8a8a8a;
  margin-bottom: 14px;
}

.site-header .mega-link {
  display: block;
  padding: 10px 8px;
  border-radius: 10px;
  margin: 0 -8px 4px;
  transition: background .2s;
}

.site-header .mega-link:hover {
  background: rgba(60, 141, 188, .08);
}

.site-header .mega-link .mega-title {
  display: block;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
  line-height: 1.35;
}

.site-header .mega-link:hover .mega-title {
  color: var(--primary);
}

.site-header .mega-link .mega-desc {
  display: block;
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--muted);
  line-height: 1.5;
}

.site-header .nav-dropdown a::after {
  display: none !important;
}

.site-header .nav-links > li > a {
  position: relative;
  padding: 4px 0;
  transition: color .25s;
  background: none !important;
}

.site-header .nav-links > li > a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .28s ease;
}

.site-header .nav-links > li > a:hover::after {
  transform: scaleX(1);
}

.site-header .btn-outline-nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 20px;
  border-radius: 999px;
  background: transparent;
  color: var(--primary);
  border: 1px solid rgba(60, 141, 188, 0.45);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: background .25s, color .25s, border-color .25s, transform .25s;
}

.site-header .btn-outline-nav:hover {
  background: rgba(60, 141, 188, 0.08);
  color: var(--primary);
  transform: translateY(-2px);
  text-decoration: none;
}

.site-header .menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
}

@media (max-width: 960px) {
  .site-header .nav-links {
    display: none;
  }

  .site-header .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg);
    padding: 16px 20px 20px;
    border-bottom: 1px solid var(--line);
    gap: 14px;
    align-items: stretch;
  }

  .site-header .nav-item.has-menu > .nav-dropdown {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    box-shadow: none;
    border: 0;
    background: transparent;
    padding: 8px 0 0;
    width: auto;
    min-width: 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .site-header .mega-col {
    padding: 0 0 8px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .site-header .mega-col:last-child {
    border-bottom: 0;
  }

  .site-header .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-header .btn-outline-nav {
    display: none;
  }
}