/* Shared top navigation. Keep this file last in <head> so page styles cannot fork the component. */
.top {
  position: sticky;
  top: 0;
  z-index: 30;
  box-sizing: border-box;
  width: 100%;
  margin: 0;
  padding: 0;
  display: block;
  border-bottom: 1px solid var(--line, #e8ddd5);
  background: rgba(247, 244, 240, .94);
  backdrop-filter: blur(16px);
}

.top *,
.top *::before,
.top *::after {
  box-sizing: border-box;
}

.top-inner {
  max-width: 100%;
  width: min(var(--page-max-wide, 720px), 100%);
  min-height: 64px;
  margin: 0 auto;
  padding: var(--space-12, var(--space-12)) var(--space-16, var(--space-16));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-12, var(--space-12));
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: var(--space-8, var(--space-8));
  color: var(--ink, #241f22);
  font-size: var(--fs-lg, 18px);
  font-weight: var(--fw-semibold, 600);
  line-height: var(--lh-heading);
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm, 8px);
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  background: linear-gradient(135deg, var(--rose, #b4536b), #d98a79);
  color: #fff;
  font-size: var(--fs-base, 14px);
  font-weight: var(--fw-semibold, 600);
}

.top-nav {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-4, var(--space-4));
  min-width: 0;
  margin-left: auto;
}

.top-link {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  min-width: 0;
  min-height: 44px;
  padding: var(--space-8, var(--space-8)) var(--space-12, var(--space-12));
  border: 0;
  border-radius: var(--radius-sm, 8px);
  background: transparent;
  color: var(--muted, #918a80);
  font-size: var(--fs-base, 14px);
  font-weight: var(--fw-semibold, 600);
  line-height: var(--lh-heading);
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color .18s ease, color .18s ease;
}

.top-link:hover {
  background: rgba(180, 83, 107, .08);
  color: var(--rose-dark, #8f3f55);
}

.top-link:focus-visible {
  outline: 3px solid rgba(180, 83, 107, .24);
  outline-offset: 2px;
}

.top-link.active,
.top-link[aria-current="page"] {
  background: var(--rose-soft, #f9ecef);
  color: var(--rose-dark, #8f3f55);
  font-weight: var(--fw-bold, 700);
}

.nav-menu {
  position: relative;
  flex: 0 0 auto;
}

.nav-menu-toggle {
  position: relative;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  border-radius: var(--radius-sm, 8px);
  display: grid;
  place-items: center;
  background: transparent;
  color: var(--ink, #241f22);
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease;
}

.nav-menu-toggle:hover,
.nav-menu-toggle[aria-expanded="true"] {
  background: var(--rose-soft, #f9ecef);
  color: var(--rose-dark, #8f3f55);
}

.nav-menu-toggle:focus-visible {
  outline: 3px solid rgba(180, 83, 107, .24);
  outline-offset: 2px;
}

.nav-menu-icon {
  width: 20px;
  height: 20px;
}

.nav-menu-panel {
  position: absolute;
  top: calc(100% + var(--space-8, 8px));
  right: 0;
  z-index: 40;
  width: min(210px, calc(100vw - 32px));
  padding: var(--space-4, var(--space-4));
  border: 1px solid var(--line, #e8ddd5);
  border-radius: var(--radius, 12px);
  background: rgba(255, 253, 250, .98);
  box-shadow: var(--shadow-menu, 0 8px 24px rgba(56, 39, 38, .10));
  backdrop-filter: blur(16px);
}

.nav-menu-panel[hidden] {
  display: none;
}

.nav-menu-link {
  min-height: 44px;
  padding: var(--space-12, var(--space-12));
  border-radius: var(--radius-sm, 8px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8, var(--space-8));
  color: var(--ink, #241f22);
  font-size: var(--fs-base, 14px);
  font-weight: var(--fw-semibold, 600);
  text-decoration: none;
}

.nav-menu-link:hover,
.nav-menu-link:focus-visible {
  background: var(--rose-soft, #f9ecef);
  color: var(--rose-dark, #8f3f55);
}

.nav-menu-link + .nav-menu-link {
  border-top: 1px solid var(--line-soft, #f1ebe6);
}

.nav-menu-dot {
  position: absolute;
  top: 7px;
  right: 7px;
  width: var(--space-8, 8px);
  height: var(--space-8, 8px);
  border: 2px solid rgba(247, 244, 240, .96);
  border-radius: 50%;
  background: #b43b45;
  box-shadow: 0 0 0 1px rgba(180, 59, 69, .16);
}

.nav-menu-dot[hidden] {
  display: none;
}

body.nav-open {
  overflow: hidden;
}

@media (max-width: 680px) {
  .top-inner {
    min-height: 56px;
    padding: var(--space-8, var(--space-8)) var(--space-16, var(--space-16));
    flex-wrap: nowrap;
  }

  .brand {
    min-height: 32px;
    font-size: var(--fs-md, 16px);
  }

  .top-nav {
    flex: 0 1 auto;
    width: auto;
    gap: 0;
    overflow: visible;
  }

  .top-link {
    min-height: 44px;
    padding: var(--space-8, var(--space-8));
    font-size: var(--fs-sm, 13px);
  }

  .top-link.optional {
    display: none;
  }

  .nav-menu-panel {
    position: fixed;
    top: 62px;
    right: var(--space-16, 16px);
  }
}

@media (max-width: 360px) {
  .top-inner {
    padding-inline: var(--space-12, var(--space-12));
  }

  .brand {
    gap: var(--space-8, var(--space-8));
    font-size: var(--fs-md, 16px);
  }

  .brand-mark {
    width: 28px;
    height: 28px;
  }

  .top-link {
    padding-inline: var(--space-4, var(--space-4));
    font-size: var(--fs-xs, 12px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .top-link,
  .nav-menu-toggle {
    transition: none;
  }
}

/* Feature flags set by /features.js. Hidden modules keep their markup and leave no empty space. */
html.feature-relations .relations {
  display: none !important;
}

/* ------------------------------------------------------------------
   官方 QQ 群公告横幅（由 top-nav.js 注入在 <header class="top"> 之前）
   ------------------------------------------------------------------ */
.site-ann {
  box-sizing: border-box;
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-8, 8px);
  padding: var(--space-8, 8px) var(--space-16, 16px);
  border-bottom: 1px solid #f0dde2;
  background: linear-gradient(90deg, #fdf3f5, var(--rose-soft, #f9ecef));
  color: var(--rose-dark, #8f3f55);
  font-size: var(--fs-sm, 13px);
  line-height: var(--lh-heading, 1.35);
}

.site-ann-badge {
  flex: 0 0 auto;
  padding: 1px var(--space-8, 8px);
  border-radius: 999px;
  background: var(--rose, #b4536b);
  color: #fff;
  font-size: var(--fs-xs, 12px);
  font-weight: var(--fw-bold, 700);
  white-space: nowrap;
}

.site-ann-text {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: var(--fw-semibold, 600);
}

.site-ann-actions {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-8, 8px);
  margin-left: auto;
}

.site-ann-copy {
  flex: 0 0 auto;
  min-height: 28px;
  padding: 2px var(--space-12, 12px);
  border: 1px solid #e2c3cb;
  border-radius: var(--radius-sm, 8px);
  background: #fff;
  color: var(--rose-dark, #8f3f55);
  font: inherit;
  font-size: var(--fs-xs, 12px);
  font-weight: var(--fw-bold, 700);
  white-space: nowrap;
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease;
}

.site-ann-copy:hover { background: var(--rose, #b4536b); border-color: var(--rose, #b4536b); color: #fff; }
.site-ann-copy:focus-visible { outline: 3px solid rgba(180, 83, 107, .24); outline-offset: 2px; }
.site-ann-copy.is-done { background: #2f7d5d; border-color: #2f7d5d; color: #fff; }
.site-ann-copy.is-fail { background: #a63d38; border-color: #a63d38; color: #fff; }

.site-ann-close {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 0;
  border-radius: var(--radius-sm, 8px);
  display: grid;
  place-items: center;
  background: transparent;
  color: #c191a0;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease;
}

.site-ann-close:hover { background: #f3dfe4; color: var(--rose-dark, #8f3f55); }
.site-ann-close:focus-visible { outline: 3px solid rgba(180, 83, 107, .24); outline-offset: 2px; }

@media (max-width: 680px) {
  .site-ann {
    padding: var(--space-8, 8px) var(--space-16, 16px);
    gap: var(--space-4, 4px);
    font-size: var(--fs-xs, 12px);
  }

  .site-ann-badge { font-size: 10px; padding: 1px 6px; }
  .site-ann-copy { min-height: 26px; padding: 2px var(--space-8, 8px); }
  .site-ann-close { width: 26px; height: 26px; font-size: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  .site-ann-copy,
  .site-ann-close { transition: none; }
}