@media (max-width: 1023px) {
  .hero-stage { min-height: 340px; grid-template-columns: minmax(0, 1.42fr) minmax(250px, .86fr); gap: 24px; }
  .hero-copy-column { padding-block: 44px 40px; }
  .hero-latest { padding-left: 18px; }
  .home-index { padding-top: 20px; }
  .track-list, .trend-rich-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 899px) {
  .search-content-layout, .detail-layout { grid-template-columns: 1fr; gap: 28px; }
  .search-trend-section, .detail-sidebar { position: static; border-left: 0; border-top: 1px solid var(--line); padding: 20px 0 0; }
  .detail-sidebar { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
  .sidebar-section + .sidebar-section { margin-top: 0; }
}

@media (max-width: 767px) {
  .shell, .search-shell, .detail-shell { width: min(calc(100% - 28px), var(--shell)); }
  .header-inner { min-height: 56px; }
  .brand-mark { width: 34px; height: 34px; }
  .operator-links { display: none; }
  .header-nav { gap: 4px; }
  .mobile-links { display: block; position: relative; }
  .mobile-links summary { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 10px; color: var(--muted); cursor: pointer; }
  .mobile-links summary:hover, .mobile-links[open] summary { color: var(--accent); background: var(--surface-accent); }
  .mobile-links-panel { position: absolute; z-index: 40; top: calc(100% + 7px); right: 0; min-width: 180px; display: flex; flex-direction: column; gap: 2px; border: 1px solid var(--line); border-radius: 12px; padding: 6px; background: var(--surface); box-shadow: var(--shadow-float); }
  .mobile-links-panel a { min-height: 44px; display: flex; align-items: center; border-radius: 8px; padding: 8px 10px; color: var(--text); font-size: 14px; font-weight: 620; }
  .mobile-links-panel a:hover { color: var(--accent); background: var(--surface-accent); }
  .header-nav .text-action { display: inline-flex; width: 44px; padding: 0; }
  .header-nav .text-action span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); }

  .hero-stage { min-height: 0; grid-template-columns: 1fr; gap: 0; }
  .hero-copy-column { padding: 32px 0 30px; }
  .hero-home h1 { font-size: 34px; line-height: 1.18; letter-spacing: -0.03em; }
  .hero-copy { margin-bottom: 16px; font-size: 15px; }
  .source-strip { flex-wrap: nowrap; gap: 14px; overflow-x: auto; margin: 12px -14px 0; padding-inline: 14px; scrollbar-width: none; }
  .source-strip::-webkit-scrollbar { display: none; }
  .source-strip-label { position: sticky; left: -14px; z-index: 1; flex: 0 0 auto; padding-left: 14px; padding-right: 4px; background: var(--surface); }
  .source-chip { flex: 0 0 auto; }
  .hero-latest { border-top: 1px solid var(--line); border-left: 0; padding: 18px 0 22px; }
  .hero-latest-list { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 22px; }
  .hero-latest-row { grid-template-columns: 22px minmax(0, 1fr); }
  .hero-latest-row .row-time { display: none; }

  .home-index { padding-block: 18px 12px; }
  .section-heading, .discovery-heading { align-items: flex-start; flex-direction: column; gap: 10px; }
  .discovery-heading { padding-bottom: 0; }
  .discovery-heading .section-title p { display: none; }
  .discovery-tabs { width: 100%; max-width: none; margin-inline: 0; }
  .track-list, .trend-rich-list { grid-template-columns: 1fr; }
  .discovery-section .resource-row { min-height: 52px; padding-inline: 2px; }
  .discovery-section .row-content { display: flex; align-items: flex-start; gap: 2px; }
  .discovery-section .row-title { white-space: normal; }
  .discovery-section .search-cue { opacity: 1; }

  .search-page, .detail-page { padding: 14px 0 18px; }
  .search-toolbar { margin-bottom: 10px; }
  .compact-search .search-submit { min-width: 78px; }
  .search-context-bar { align-items: stretch; flex-direction: column; gap: 0; }
  .mode-tabs { width: 100%; gap: 8px; }
  .mode-tab { flex: 1; }
  .search-context-summary { width: 100%; min-height: 42px; text-align: left; }
  .search-context-summary > div { width: 100%; justify-content: space-between; flex-wrap: wrap; gap: 0 12px; }
  .filter-tabs { margin-inline: -14px; padding-inline: 14px; }
  .result-row { min-height: 0; grid-template-columns: 34px minmax(0, 1fr); column-gap: 10px; row-gap: 4px; padding: 10px 0; }
  .result-list .drive-badge { width: 32px; height: 32px; }
  .result-list .drive-badge img { width: 28px; height: 28px; }
  .result-row .row-actions { grid-column: 2; justify-content: flex-start; margin-top: 0; }
  .row-actions .button { padding-inline: 13px; }
  .copy-action { min-width: 76px; }
  .status-line { font-size: 12px; }
  .status-track { min-width: 30px; }
  .flow-section { margin-top: 24px; padding-top: 20px; }
  .flow-heading { align-items: flex-start; margin-bottom: 6px; }
  .inline-tabs { margin-inline: -14px; padding-inline: 14px; }
  .discovery-row { min-height: 52px; }
  .search-trend-section { margin-top: 0; }

  .detail-toolbar { align-items: stretch; flex-wrap: wrap; gap: 6px; margin-bottom: 4px; }
  .detail-search-masthead { min-width: 100%; order: 2; }
  .back-link { order: 1; }
  .article-header { padding: 14px 0 10px; }
  .article-header h1 { font-size: 24px; line-height: 1.3; }
  .article-body { padding-top: 10px; }
  .article-content { font-size: 15px; }
  .article-cover { float: none; width: 100%; max-height: 300px; margin: 0 0 16px; }
  .resource-access { grid-template-columns: 1fr; align-items: stretch; gap: 12px; margin-top: 12px; }
  .resource-facts > div { align-items: flex-start; }
  .resource-facts dt { flex-basis: 60px; padding-top: 12px; }
  .article-actions { width: 100%; }
  .article-actions .button { flex: 1; }
  .detail-resource-grid { grid-template-columns: 1fr; }
  .detail-resource-grid .compact-rank-row:nth-last-child(2) { border-bottom: 1px solid var(--line); }
  .compact-rank-row { grid-template-columns: 16px minmax(0, 1fr); }
  .compact-rank-row .row-time { grid-column: 2; }
  .detail-sidebar { display: block; margin-top: 0; }
  .detail-sidebar-tabs { display: flex; align-items: center; gap: 16px; overflow-x: auto; margin-inline: -14px; border-bottom: 1px solid var(--line); padding-inline: 14px; scrollbar-width: none; }
  .detail-sidebar-tabs::-webkit-scrollbar { display: none; }
  .detail-sidebar-tabs .tab { min-height: 44px; flex: 0 0 auto; border: 0; border-bottom: 2px solid transparent; border-radius: 0; padding: 8px 2px 7px; background: transparent; }
  .detail-sidebar-tabs .tab.active { border-color: var(--accent); color: var(--accent); background: transparent; }
  .detail-sidebar .sidebar-section { display: none; margin-top: 0; }
  .detail-sidebar .sidebar-section.is-active { display: block; }
  .detail-sidebar .sidebar-heading { display: none; }
  .sidebar-row { min-height: 44px; padding-block: 4px; }

  .footer-inner { min-height: 0; padding-block: 18px; }
}

@media (max-width: 420px) {
  .brand-name { max-width: 140px; }
  .hero-copy-column { padding-top: 28px; }
  .hero-home h1 { font-size: 30px; }
  .hero-latest-list { grid-template-columns: 1fr; }
  .hero-latest-row:nth-child(n+5) { display: none; }
  .search-submit { min-width: 82px; padding-inline: 12px; }
  .section-title h2 { font-size: 20px; }
  .result-row .row-actions { width: 100%; }
  .row-actions .button.primary { flex: 1; }
  .article-header h1 { font-size: 22px; }
  .resource-facts > div { display: block; }
  .resource-facts dt { padding: 0; margin-bottom: 2px; }
  .article-actions { flex-wrap: wrap; }
  .article-actions .button { flex: 1 1 132px; }
}