/* One reading column and one shared rail for article and airport detail pages. */
.reading-page .article-layout { display: block; }
.unified-rail .rail-toc { display: none; }
.article-related { margin: 30px 0 0; padding: 22px 0 0; border-top: 1px solid var(--line); }
.article-related h2 { margin: 0 0 8px; color: #334762; font-size: 18px; }
.article-related .related-link { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
.article-related .related-link .icon { width: 16px; height: 16px; flex-shrink: 0; }

@media (min-width: 1280px) {
  .reading-page .container {
    width: min(920px, calc(100% - 360px));
    margin-left: max(32px, calc((100% - 1216px) / 2));
    margin-right: auto;
  }
  .reading-page .unified-rail {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 264px;
    max-height: calc(100dvh - 210px);
    right: max(32px, calc((100vw - 1216px) / 2));
    overflow: hidden;
  }
  .unified-rail .rail-toc {
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    min-height: 124px;
    margin: 0;
    padding: 14px 13px 11px;
    overflow: hidden;
    border-radius: 12px;
  }
  .rail-toc > strong { flex-shrink: 0; margin: 0 3px 9px; color: #263a63; font-size: 13px; }
  .rail-toc-links { min-height: 0; overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; }
  .rail-toc .toc-link { padding: 5px 7px 5px 10px; font-size: 12px; line-height: 1.6; }
  .rail-toc .toc-link.level-3 { padding-left: 17px; }
  .unified-rail .topic-nav { flex-shrink: 0; padding: 12px 12px 10px; border-radius: 12px; }
  .unified-rail .topic-nav h2 { margin: 0 2px 8px; font-size: 12px; }
  .unified-rail .topic-nav ul { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 5px; }
  .unified-rail .topic-nav li + li { border: 0; }
  .unified-rail .topic-nav a { min-height: 29px; justify-content: flex-start; padding: 5px 7px; background: #f6f8fc; font-size: 11px; line-height: 1.6; }
  .unified-rail .topic-nav a > .icon { display: none; }
  .unified-rail .floating-airports { flex-shrink: 0; margin: 0; padding: 10px; border-radius: 12px; box-shadow: none; }
  .unified-rail .floating-airports-head { margin-bottom: 7px; }
  .unified-rail .floating-airport-list { gap: 7px; }
  .unified-rail .floating-provider { display: flex; align-items: center; justify-content: space-between; gap: 6px; padding: 9px 7px; border-radius: 8px; }
  .unified-rail .floating-provider-heading { gap: 6px; }
  .unified-rail .floating-provider-note { display: none; }
  .unified-rail .floating-provider-name { font-size: 12px; }
  .unified-rail .floating-provider .provider-mark { width: 25px; height: 25px; border-radius: 6px; }
  .unified-rail .floating-provider-actions { margin: 0; gap: 7px; }
  .unified-rail .floating-provider-detail .icon { display: none; }
  .unified-rail .floating-provider-actions .button { min-height: 30px; padding: 6px; font-size: 11px; }
  .unified-rail .floating-provider-actions .button .icon { display: none; }
  .reading-page .floating-tools { right: max(32px, calc((100vw - 1216px) / 2)); }
}
@media (min-width: 761px) and (max-width: 1279px) {
  .reading-page .mobile-toc { display: block; margin-bottom: 27px; padding: 13px 17px; border: 1px solid #dfe6f1; border-radius: 10px; background: white; }
  .reading-page .mobile-toc summary { color: var(--muted); font-size: 12px; cursor: pointer; }
  .reading-page .mobile-toc nav { margin-top: 12px; }
}
@media (min-width: 1280px) and (max-height: 720px) {
  .reading-page .unified-rail { overflow-y: auto; }
  .unified-rail .rail-toc { flex-shrink: 0; height: 124px; }
}
@media print { .reading-page .container { width: 100%; margin: 0; } }