/* Final shared palette and navigation layer for every public page. */
:root {
  --accent: #003153;
  --accent-rgb: 0, 49, 83;
  --accent-dark: #00243d;
  --accent-light: #e8f0f4;
  --text: #1a1a1a;
  --text-muted: #666;
  --border: #dce5eb;
  --bg: #fff;
  --bg-alt: #f4f7f9;
}

html :focus-visible {
  outline: 3px solid rgba(var(--accent-rgb), 0.36);
  outline-offset: 3px;
}

/* The header scope also overrides older Chinese-language spacing rules. */
html .site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 12px 0;
  border-bottom: 1px solid #e3ebef;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 2px 12px rgba(var(--accent-rgb), 0.025);
}

html .site-header .container {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 28px;
}

html .site-header .nav-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: nowrap;
  gap: 18px;
  min-width: 0;
}

html .site-header .nav-logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  gap: 9px;
  color: var(--accent);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.65;
  letter-spacing: -0.01em;
  text-decoration: none;
  white-space: nowrap;
}

html .site-header .nav-logo::before {
  content: "";
  flex-shrink: 0;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--accent);
}

html .site-header .nav-links {
  display: flex;
  position: static;
  inset: auto;
  flex: 1 1 auto;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: flex-end;
  min-width: 0;
  gap: clamp(12px, 1.6vw, 22px);
  order: 0;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

html .site-header .nav-links a {
  position: relative;
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  width: auto;
  min-height: 34px;
  padding: 0;
  border: 0;
  color: #516773;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.65;
  text-align: left;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease;
}

html .site-header .nav-links a:hover,
html .site-header .nav-links a:focus-visible,
html .site-header .nav-links a.active,
html .site-header .nav-links a[aria-current="page"] {
  color: var(--accent);
}

html .site-header .nav-links a.active,
html .site-header .nav-links a[aria-current="page"] {
  font-weight: 600;
}

html .site-header .nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 1px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

html .site-header .nav-links a:hover::after,
html .site-header .nav-links a:focus-visible::after,
html .site-header .nav-links a.active::after,
html .site-header .nav-links a[aria-current="page"]::after {
  transform: scaleX(1);
}

html .site-header .language-toggle {
  display: inline-flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  min-width: 64px;
  height: 34px;
  order: 0;
  margin: 0;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  color: var(--accent);
  font: 600 13px/1 var(--font);
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

html .site-header .language-toggle:hover,
html .site-header .nav-toggle:hover {
  border-color: var(--accent);
  background: var(--accent-light);
}

html .site-header .nav-toggle {
  display: none;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  order: 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--accent);
  cursor: pointer;
}

html .site-header .nav-toggle-lines,
html .site-header .nav-toggle-lines::before,
html .site-header .nav-toggle-lines::after {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
}

html .site-header .nav-toggle-lines {
  position: relative;
}

html .site-header .nav-toggle-lines::before,
html .site-header .nav-toggle-lines::after {
  content: "";
  position: absolute;
  left: 0;
}

html .site-header .nav-toggle-lines::before { top: -6px; }
html .site-header .nav-toggle-lines::after { top: 6px; }

@media (max-width: 900px) {
  html .site-header .nav-inner {
    flex-wrap: wrap;
    gap: 10px;
  }

  html .site-header .language-toggle {
    order: 2;
    margin-left: auto;
  }

  html .site-header .nav-toggle {
    order: 3;
  }

  html .site-header.js-mobile-nav .nav-toggle {
    display: inline-flex;
  }

  /* Links remain available when scripts are disabled or unavailable. */
  html .site-header .nav-links {
    display: flex;
    position: static;
    flex-basis: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 10px 16px;
    order: 4;
  }

  html .site-header .nav-links a {
    min-height: 44px;
  }

  html .site-header.js-mobile-nav .nav-links {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-top: 6px;
  }

  html .site-header.nav-open .nav-links {
    display: flex;
  }

  html .site-header.js-mobile-nav .nav-links a {
    width: 100%;
    min-height: 44px;
    padding: 10px 0;
    border-top: 1px solid var(--border);
    white-space: normal;
    overflow-wrap: anywhere;
  }

  html .site-header.js-mobile-nav .nav-links a::after {
    display: none;
  }
}

@media (max-width: 680px) {
  html .site-header .container {
    padding-inline: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}