/* 星群社区 · 干净版首页（2026-10-21）
   目标：GitHub / Hugging Face 式的信息密度和边界，而不是粒子落地页。 */
.ch-body{background:var(--bg);color:var(--ink);min-height:100vh}
.ch-nav{padding:0 clamp(16px,4vw,48px);background:color-mix(in srgb,var(--bg) 92%,transparent)}
.ch-brand{font-size:17px;letter-spacing:-.02em}
.ch-brand .cn{font-size:12px;letter-spacing:.04em}
.ch-nav .links{gap:22px}
.ch-nav .links a{font-size:13px}
.ch-main{max-width:1180px;margin:0 auto;padding:108px clamp(16px,4vw,40px) 0}
.ch-hero{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(240px,.65fr);gap:clamp(24px,5vw,72px);
  align-items:end;padding:clamp(30px,6vw,72px) 0 clamp(34px,6vw,72px);border-bottom:1px solid var(--line)}
.ch-eyebrow,.ch-kicker{display:block;font-size:10.5px;letter-spacing:.18em;font-weight:600;color:var(--ink3)}
.ch-hero h1{margin:14px 0 0;font-size:clamp(38px,6vw,72px);line-height:1.02;letter-spacing:-.055em;
  font-weight:600;color:var(--ink)}
.ch-hero p{max-width:54ch;margin:20px 0 0;font-size:14px;line-height:1.85;color:var(--ink2)}
.ch-hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px}
.ch-btn{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 18px;
  border:1px solid var(--line2);border-radius:8px;background:var(--panel);color:var(--ink);
  text-decoration:none;font-size:13px;font-weight:600;transition:background .18s,border-color .18s}
.ch-btn:hover{background:var(--band);border-color:var(--accent-line)}
.ch-btn--primary{background:var(--ink);border-color:var(--ink);color:var(--bg)}
.ch-btn--primary:hover{background:var(--ink);color:var(--bg);opacity:.9}
.ch-stats{display:flex;align-items:baseline;gap:22px;flex-wrap:wrap;margin-top:26px;font-size:12px;color:var(--ink3)}
.ch-stats b{font-size:22px;font-weight:600;color:var(--ink);letter-spacing:-.03em;margin-right:4px;
  font-variant-numeric:tabular-nums}
.ch-stat-note{padding:2px 8px;border:1px solid var(--line2);border-radius:999px;font-size:10.5px}
.ch-hero-note{padding:18px 0 6px;border-left:1px solid var(--line2);padding-left:22px}
.ch-note-label{font-size:10.5px;letter-spacing:.14em;font-weight:600;color:var(--ink3)}
.ch-hero-note p{margin:10px 0 12px;font-size:12.5px;line-height:1.8;color:var(--ink2)}
.ch-hero-note a,.ch-textlink{font-size:12px;color:var(--accent);text-decoration:none}
.ch-hero-note a:hover,.ch-textlink:hover{text-decoration:underline;text-underline-offset:3px}
.ch-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:clamp(28px,5vw,64px);
  padding:34px 0 60px}
.ch-section-head{display:flex;align-items:end;justify-content:space-between;gap:14px}
.ch-section-head h2{margin:6px 0 0;font-size:24px;letter-spacing:-.03em;font-weight:600}
.ch-toolbar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:20px}
.ch-search{flex:1 1 280px;max-width:420px}
.ch-search input{width:100%;height:38px;padding:0 12px;border:1px solid var(--line2);border-radius:7px;
  background:var(--panel);color:var(--ink);font:inherit;font-size:12.5px;outline:none}
.ch-search input:focus{border-color:var(--accent-line);box-shadow:0 0 0 3px var(--accent-soft)}
.ch-chips{display:flex;gap:6px;flex-wrap:wrap}
.ch-chip{min-height:30px;padding:4px 10px;border:1px solid var(--line);border-radius:999px;
  background:transparent;color:var(--ink2);font:inherit;font-size:11.5px;cursor:pointer}
.ch-chip:hover{border-color:var(--line2);color:var(--ink)}
.ch-chip.is-on{background:var(--accent-soft);border-color:var(--accent-line);color:var(--accent)}
.ch-result{margin:12px 0 0;font-size:11.5px;color:var(--ink3)}
.ch-feed{margin-top:6px;border-top:1px solid var(--line)}
.ch-work{display:grid;grid-template-columns:112px minmax(0,1fr) auto;gap:16px;align-items:start;
  padding:18px 0;border-bottom:1px solid var(--line);text-decoration:none;color:inherit}
.ch-work:hover .ch-work-title{color:var(--accent)}
.ch-work-cover{display:block;width:112px;height:72px;border:1px solid var(--line);border-radius:7px;
  object-fit:cover;background:var(--band)}
.ch-work-cover--empty{display:grid;place-items:center;color:var(--ink3);font-size:10px}
.ch-work-title{margin:0;font-size:16px;line-height:1.35;letter-spacing:-.015em;font-weight:600;
  color:var(--ink);transition:color .15s}
.ch-work-intro{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin:6px 0 0;font-size:12px;line-height:1.7;color:var(--ink2)}
.ch-work-meta{display:flex;align-items:center;gap:7px;flex-wrap:wrap;margin-top:10px;
  font-size:11px;color:var(--ink3)}
.ch-work-meta span+span::before{content:"·";margin-right:7px;color:var(--line2)}
.ch-work-side{min-width:105px;text-align:right;font-size:10.5px;line-height:1.8;color:var(--ink3)}
.ch-work-side b{display:block;font-weight:500;color:var(--ink2)}
.ch-loading,.ch-empty{padding:30px 0;color:var(--ink3);font-size:12.5px}
.ch-side{min-width:0}
.ch-side-block{padding:0 0 22px;margin:0 0 22px;border-bottom:1px solid var(--line)}
.ch-side-block h3{margin:0 0 12px;font-size:12px;letter-spacing:.08em;font-weight:600;color:var(--ink2)}
.ch-members{display:flex;flex-direction:column;gap:9px;margin-bottom:12px}
.ch-member{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink2);font-size:12px}
.ch-member:hover{color:var(--ink)}
.ch-member img,.ch-member span.ch-av{width:26px;height:26px;border-radius:50%;object-fit:cover;flex:none;
  display:grid;place-items:center;background:var(--band);border:1px solid var(--line2);font-size:11px}
.ch-member small{display:block;color:var(--ink3);font-size:10.5px;margin-top:1px}
.ch-steps{margin:0 0 12px;padding-left:18px;color:var(--ink2);font-size:12px;line-height:2}
.ch-side-rules p{margin:0 0 10px;font-size:11.5px;line-height:1.8;color:var(--ink2)}
.ch-dot{color:var(--ink3);margin:0 6px}
.ch-muted{font-size:11.5px;color:var(--ink3)}
.ch-footer{max-width:1180px;margin:0 auto;padding:22px clamp(16px,4vw,40px) 36px;border-top:1px solid var(--line);
  display:flex;gap:14px;flex-wrap:wrap;justify-content:space-between;font-size:11px;color:var(--ink3)}
.ch-footer a{color:var(--ink2);text-decoration:none;margin-left:12px}
.ch-footer a:hover{color:var(--ink)}
@media (max-width:900px){
  .ch-main{padding-top:132px}
  .ch-hero{grid-template-columns:1fr;gap:22px}
  .ch-hero-note{border-left:0;border-top:1px solid var(--line);padding:16px 0 0}
  .ch-layout{grid-template-columns:1fr}
  .ch-side{order:-1;display:grid;grid-template-columns:1fr 1fr;gap:0 24px}
  .ch-side-block{margin-bottom:18px}
  .ch-side-rules{display:none}
}
@media (max-width:600px){
  .ch-main{padding-top:138px}
  .ch-hero h1{font-size:clamp(34px,10vw,46px)}
  .ch-nav .links{gap:12px}
  .ch-nav .links a{font-size:12px}
  .ch-work{grid-template-columns:84px minmax(0,1fr);gap:11px}
  .ch-work-cover{width:84px;height:56px}
  .ch-work-side{display:none}
  .ch-side{grid-template-columns:1fr}
  .ch-side-block:first-child{order:2}
  .ch-side-block:nth-child(2){order:1}
  .ch-footer a{margin-left:0;margin-right:12px}
}