:root{
  --adaptive-grid-gap:8px;
  --uniform-shortcut-width:clamp(164px,12.8vw,184px);
}

.section-subtitle{display:inline-flex;align-items:center;color:var(--muted);font-size:.8rem;font-weight:600;line-height:1;white-space:nowrap}
.section-subtitle::before{content:"·";margin:0 8px 0 2px;color:var(--line);font-size:1rem;font-weight:700}
.single-group-section .group-head{display:none}.single-group-section .group{margin-top:0;padding-top:0;border-top:0}

/* Home preview headings are explicit entry points to their complete libraries. */
.section-title-link[href="./nav-directory.html"],
.section-title-link[href="./research-directory.html"]{display:inline-flex;align-items:center;gap:10px;min-height:32px}
.section-title-link[href="./nav-directory.html"]::after,
.section-title-link[href="./research-directory.html"]::after{display:inline-flex;align-items:center;min-height:28px;padding:0 9px;border:1px solid color-mix(in srgb,var(--blue) 30%,var(--line));border-radius:999px;background:var(--blue2);color:var(--blue);font-size:.7rem;font-weight:700;line-height:1;white-space:nowrap;transition:transform .13s ease,border-color .13s ease,background .13s ease}
.section-title-link[href="./nav-directory.html"]::after{content:"查看全部导航  →"}
.section-title-link[href="./research-directory.html"]::after{content:"查看全部科研  →"}
.section-title-link[href="./nav-directory.html"]:hover::after,
.section-title-link[href="./nav-directory.html"]:focus-visible::after,
.section-title-link[href="./research-directory.html"]:hover::after,
.section-title-link[href="./research-directory.html"]:focus-visible::after{border-color:var(--blue);background:color-mix(in srgb,var(--blue2) 72%,var(--panel));transform:translateX(2px)}

@media (min-width:901px){
  .section:not(#quick) .grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));align-items:stretch;gap:var(--adaptive-grid-gap);min-width:0;max-width:100%}
  .directory-section .grid{grid-template-columns:repeat(4,minmax(0,1fr))}
  .section .panel,#quick .panel{min-width:0;max-width:100%}
  .section:not(#quick) .card{width:100%;min-width:0;max-width:none;background:transparent;border-color:transparent;box-shadow:none}
  .section:not(#quick) .card:hover,.section:not(#quick) .card:focus-visible{background:var(--soft)}
  #quick .grid{display:flex;flex-wrap:wrap;align-items:stretch;gap:var(--adaptive-grid-gap)}
  #quick .card{flex:0 0 var(--uniform-shortcut-width);width:var(--uniform-shortcut-width);min-width:var(--uniform-shortcut-width);max-width:var(--uniform-shortcut-width);background:var(--soft)}
  .card .copy{flex:1 1 auto;width:auto;min-width:0}
  .card .name{width:100%;max-width:100%;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .single-group-section{grid-template-areas:"heading heading" "panel panel"}
}
@media (min-width:1100px) and (max-width:1279px){.section:not(#quick) .grid{grid-template-columns:repeat(5,minmax(0,1fr))}}
@media (min-width:1180px) and (max-width:1399px){.directory-section .grid{grid-template-columns:repeat(5,minmax(0,1fr))}}
@media (min-width:1280px){.section:not(#quick) .grid{grid-template-columns:repeat(6,minmax(0,1fr))}}
@media (min-width:1400px){.directory-section .grid{grid-template-columns:repeat(6,minmax(0,1fr))}}
@media (min-width:341px) and (max-width:900px){
  .section-title{min-width:0;flex-wrap:wrap;row-gap:4px}.section-subtitle{font-size:.77rem}
  .section:not(#quick) .grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--adaptive-grid-gap)}
  .section:not(#quick) .card{width:100%;min-width:0;max-width:none}.section:not(#quick) .card .name{width:100%;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
}
@media (max-width:340px){
  .section-title{min-width:0;flex-wrap:wrap;row-gap:4px}.section-subtitle{font-size:.77rem}
  .section-title-link[href="./nav-directory.html"],.section-title-link[href="./research-directory.html"]{gap:7px}
  .section-title-link[href="./nav-directory.html"]::after{content:"全部导航  →";padding:0 7px;font-size:.66rem}
  .section-title-link[href="./research-directory.html"]::after{content:"全部科研  →";padding:0 7px;font-size:.66rem}
  .section:not(#quick) .grid{display:grid;grid-template-columns:minmax(0,1fr);gap:var(--adaptive-grid-gap)}
  .section:not(#quick) .card{width:100%;min-width:0;max-width:none}
}