/* SpaceAtlas design system v2 (2026-11-04)
   Modern astronomy data-station theme: deep-space hero + bright data surface.
   Rules: no external fonts, no remote assets, RTL-safe logical properties,
   reduced-motion friendly, min 32px touch targets, zero layout shift. */
:root{
  --bg:#f5f7fb; --surface:#ffffff; --surface-2:#f0f4fa;
  --fg:#101a2e; --muted:#5b6b84; --faint:#8493aa;
  --line:#e2e8f2; --line-strong:#cbd7e8;
  --accent:#2f6df0; --accent-dark:#1c4fbd; --accent-soft:#e8f0ff;
  --amber:#f0a44b; --danger:#d94f4f; --danger-soft:#fdecec;
  --space-0:#060d1e; --space-1:#0b1730; --space-2:#132b55; --space-3:#1e4a86;
  --on-space:#f2f7ff; --on-space-muted:#a8bddc;
  --chip:#edf3fc; --chip-hover:#e2ecfb;
  --radius:14px; --radius-sm:10px; --radius-lg:22px;
  --shadow-1:0 1px 2px rgba(16,26,46,.05),0 6px 18px rgba(16,26,46,.045);
  --shadow-2:0 2px 6px rgba(16,26,46,.07),0 16px 40px rgba(16,26,46,.10);
  --maxw:1160px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--fg);background:var(--bg);
  line-height:1.65;font-variant-numeric:tabular-nums;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
img{max-width:100%}
button,input,select{font:inherit}
:focus-visible{outline:3px solid var(--amber);outline-offset:3px;border-radius:4px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.skip-link{position:absolute;left:-9999px;top:0;z-index:10000;background:var(--accent);color:#fff;
  padding:10px 16px;border-radius:0 0 10px 0;min-height:44px;display:inline-flex;align-items:center}
.skip-link:focus{left:0;text-decoration:none}
.scroll-progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:9998;
  background:linear-gradient(90deg,var(--accent),#63a0ff,var(--amber));
  transition:width .08s linear;pointer-events:none}

/* ---------- Header ---------- */
header.site{background:var(--surface);border-bottom:1px solid var(--line);
  position:relative;z-index:20}
header.site.is-scrolled{box-shadow:0 4px 22px rgba(16,26,46,.08)}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:15px 0 12px;flex-wrap:wrap}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:21px;
  letter-spacing:-.035em;color:var(--fg);min-height:40px}
.brand:hover{text-decoration:none}
.brand a{color:var(--fg)}
.brand-mark{width:34px;height:34px;flex:0 0 34px;display:block}
.brand small{font-weight:500;color:var(--faint);font-size:12px;letter-spacing:.02em;
  margin-inline-start:2px;padding-inline-start:12px;border-inline-start:1px solid var(--line-strong)}
.header-tools{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.search{display:flex;align-items:center;gap:0;background:var(--surface-2);
  border:1px solid var(--line);border-radius:999px;padding:3px;transition:.2s}
.search:focus-within{border-color:var(--accent);background:var(--surface);
  box-shadow:0 0 0 4px var(--accent-soft)}
.search input{border:0;background:transparent;padding:8px 14px;width:250px;max-width:52vw;
  font-size:14px;color:var(--fg);outline:none;border-radius:999px}
.search input::placeholder{color:var(--faint)}
.search button{border:0;background:var(--accent);color:#fff;border-radius:999px;
  padding:9px 18px;cursor:pointer;font-size:14px;font-weight:650;min-height:38px;
  transition:background .2s}
.search button:hover{background:var(--accent-dark)}
.lang-switch{display:flex;gap:5px;flex-wrap:wrap;font-size:12px;padding:2px 0 10px;
  max-width:100%}
.lang-switch a{min-width:34px;min-height:32px;display:inline-flex;align-items:center;
  justify-content:center;padding:0 9px;border:1px solid var(--line);border-radius:8px;
  color:var(--muted);background:var(--surface);transition:.18s}
.lang-switch a:hover,.lang-switch a[aria-current="true"]{text-decoration:none;
  border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}
.nav2{display:flex;gap:3px;flex-wrap:wrap;padding:2px 0 11px;font-size:13.5px}
.nav2 a{min-height:36px;display:inline-flex;align-items:center;padding:0 13px;
  border-radius:9px;color:var(--muted);font-weight:550;transition:.18s}
.nav2 a:hover{text-decoration:none;color:var(--accent);background:var(--accent-soft)}
.nav2 a.is-active{color:var(--accent-dark);background:var(--accent-soft);font-weight:700}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;color:var(--on-space);
  background:radial-gradient(1100px 520px at 78% -10%,rgba(69,137,255,.28),transparent 62%),
             radial-gradient(700px 420px at 8% 110%,rgba(240,164,75,.13),transparent 60%),
             linear-gradient(135deg,var(--space-0),var(--space-1) 52%,var(--space-2));
  border-bottom:1px solid rgba(255,255,255,.08)}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.62;
  background-image:
    radial-gradient(1.5px 1.5px at 12% 22%,#fff,transparent),
    radial-gradient(1.5px 1.5px at 28% 68%,#cfe0ff,transparent),
    radial-gradient(2px 2px at 42% 16%,#fff,transparent),
    radial-gradient(1px 1px at 58% 78%,#fff,transparent),
    radial-gradient(1.5px 1.5px at 72% 34%,#ffe4bd,transparent),
    radial-gradient(1px 1px at 86% 62%,#fff,transparent),
    radial-gradient(1.5px 1.5px at 94% 18%,#fff,transparent),
    radial-gradient(1px 1px at 19% 88%,#fff,transparent),
    radial-gradient(1px 1px at 64% 8%,#fff,transparent);
  background-size:100% 100%}
.hero__inner{position:relative;z-index:1;display:grid;
  grid-template-columns:minmax(0,1.25fr) minmax(260px,.75fr);gap:32px;
  align-items:center;padding:52px 0 46px;min-height:290px}
.hero__kicker{display:inline-flex;align-items:center;gap:8px;font-size:12px;
  letter-spacing:.12em;text-transform:uppercase;color:#9fc2ff;font-weight:700;
  background:rgba(79,140,255,.14);border:1px solid rgba(120,170,255,.28);
  padding:6px 13px;border-radius:999px;margin-bottom:18px}
.hero__kicker::before{content:"";width:7px;height:7px;border-radius:50%;
  background:#63e6a8;box-shadow:0 0 0 4px rgba(99,230,168,.18)}
.hero h1{font-size:clamp(34px,5vw,54px);line-height:1.08;margin:0 0 14px;
  letter-spacing:-.045em;font-weight:800;color:#fff}
.hero p.hero__sub{margin:0 0 24px;font-size:16.5px;line-height:1.7;
  color:var(--on-space-muted);max-width:60ch}
.hero__actions{display:flex;gap:10px;flex-wrap:wrap}
.btn-primary,.btn-ghost{display:inline-flex;align-items:center;justify-content:center;
  gap:8px;min-height:44px;padding:0 20px;border-radius:11px;font-weight:650;font-size:14.5px;
  transition:transform .18s,box-shadow .18s,background .18s}
.btn-primary{background:linear-gradient(135deg,#3f7bff,#2f6df0);color:#fff;
  box-shadow:0 8px 22px rgba(47,109,240,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(47,109,240,.45);
  text-decoration:none;color:#fff}
.btn-ghost{border:1px solid rgba(255,255,255,.28);color:var(--on-space);
  background:rgba(255,255,255,.06)}
.btn-ghost:hover{background:rgba(255,255,255,.13);text-decoration:none;color:#fff}
.hero__art{position:relative;height:230px;display:flex;align-items:center;justify-content:center}
.hero__art svg{width:100%;height:100%;max-width:330px;overflow:visible}
.hero__stats{position:relative;z-index:1;display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;
  background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius);overflow:hidden;margin-bottom:42px}
.hero__stat{background:rgba(9,20,42,.80);padding:16px 18px}
.hero__stat .k{font-size:11.5px;letter-spacing:.07em;text-transform:uppercase;
  color:var(--on-space-muted);font-weight:600}
.hero__stat .v{font-size:26px;font-weight:800;letter-spacing:-.03em;color:#fff;margin-top:2px}
.hero__stat .v em{font-style:normal;font-size:13px;color:#9fc2ff;font-weight:600;
  margin-inline-start:5px}

/* ---------- Main surface ---------- */
main{padding:30px 0 66px;min-height:62vh}
h1{font-size:clamp(26px,3.6vw,36px);line-height:1.2;margin:0 0 8px;
  letter-spacing:-.035em;font-weight:800}
h2{font-size:21px;line-height:1.3;margin:34px 0 14px;letter-spacing:-.025em;font-weight:760}
h3{font-size:16.5px;margin:22px 0 8px;font-weight:700}
.lead{color:var(--muted);margin:0 0 20px;font-size:15.5px;line-height:1.75}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:14px;
  margin:36px 0 14px;flex-wrap:wrap}
.section-head h2{margin:0}
.section-head .eyebrow{display:block;font-size:11.5px;letter-spacing:.13em;
  text-transform:uppercase;color:var(--accent);font-weight:750;margin-bottom:3px}
.section-head .more{font-size:13.5px;font-weight:650;min-height:32px;
  display:inline-flex;align-items:center;gap:5px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;margin:14px 0;box-shadow:var(--shadow-1)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(235px,1fr));gap:14px}
.co{position:relative;display:block;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:16px 17px;color:var(--fg);overflow:hidden;
  box-shadow:var(--shadow-1);transition:transform .18s,box-shadow .18s,border-color .18s}
.co::after{content:"→";position:absolute;inset-inline-end:15px;bottom:12px;
  font-size:15px;color:var(--accent);opacity:0;transform:translateX(-5px);transition:.18s}
.co:hover{text-decoration:none;border-color:#a9c6ff;transform:translateY(-3px);
  box-shadow:var(--shadow-2)}
.co:hover::after{opacity:1;transform:translateX(0)}
.co .t{font-weight:700;font-size:15.5px;line-height:1.35;margin-bottom:6px;
  padding-inline-end:16px;word-break:break-word}
.co .n{color:var(--muted);font-size:13px;line-height:1.6;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.co .s{color:var(--accent);font-size:12.5px;margin-top:8px;font-weight:600}
.co img{max-height:120px;object-fit:cover;border-radius:8px;margin-bottom:10px}
.pill{display:inline-flex;align-items:center;background:var(--chip);border-radius:999px;
  padding:5px 12px;font-size:12.5px;color:var(--muted);font-weight:600}
.hazard{display:inline-flex;align-items:center;background:var(--danger-soft);
  color:#a43131;border-radius:999px;padding:5px 12px;font-size:12.5px;font-weight:650}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:18px;display:flex;
  align-items:center;gap:8px;flex-wrap:wrap}
.breadcrumb a{min-height:32px;display:inline-flex;align-items:center}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}
.chip{border:1px solid var(--line);background:var(--surface);border-radius:999px;
  padding:6px 14px;font-size:13.5px;color:var(--fg);min-height:36px;
  display:inline-flex;align-items:center;font-weight:550;transition:.18s}
.chip:hover{text-decoration:none;border-color:var(--accent);color:var(--accent);
  background:var(--accent-soft)}
.summary{display:grid;grid-template-columns:repeat(auto-fit,minmax(155px,1fr));gap:12px;margin:16px 0}
.metric{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:15px 17px;box-shadow:var(--shadow-1)}
.metric .k{font-size:12px;color:var(--muted);font-weight:600}
.metric .v{font-size:23px;font-weight:800;margin-top:4px;letter-spacing:-.03em}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--surface);box-shadow:var(--shadow-1)}
table.fs{width:100%;border-collapse:collapse;font-size:14px;margin:6px 0 22px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
table.fs th,table.fs td{border-bottom:1px solid var(--line);padding:11px 14px;text-align:end}
table.fs th:first-child,table.fs td:first-child{text-align:start;color:var(--muted)}
table.fs thead th{font-size:12px;color:var(--muted);font-weight:700;
  letter-spacing:.04em;text-transform:uppercase;background:var(--surface-2)}
table.fs tbody tr:hover{background:var(--accent-soft)}
table.fs a{min-height:32px;display:inline-flex;align-items:center}
.guide-body{line-height:1.85;font-size:15.5px}
.guide-body p{margin:0 0 15px}
.guide-body h2{margin-top:30px}
.guide-body a{display:inline-block;padding:4px 2px;min-height:32px}
.toplist{list-style:none;counter-reset:tl;margin:0;padding:0}
.toplist li{counter-increment:tl;display:flex;align-items:center;gap:10px;
  border-bottom:1px solid var(--line);padding:6px 0}
.toplist li::before{content:counter(tl);width:26px;color:var(--faint);font-size:12px;
  text-align:end;font-weight:700}
.toplist a{flex:1;min-height:32px;display:inline-flex;align-items:center}
.toplist .cnt{color:var(--muted);font-size:13px}
.spark{width:100%;height:64px;color:var(--accent);border:1px solid var(--line);
  border-radius:var(--radius-sm);background:var(--surface-2)}
.barchart{margin:8px 0}
.bar-row{display:grid;grid-template-columns:100px 1fr 66px;align-items:center;
  gap:10px;font-size:13px;margin:6px 0}
.bar{background:linear-gradient(90deg,var(--accent),#79a9ff);height:14px;
  border-radius:5px;min-width:2px}
.tabs{display:flex;gap:6px;margin:14px 0;flex-wrap:wrap}
.tabs a{border:1px solid var(--line);background:var(--surface);border-radius:9px;
  padding:5px 15px;min-height:36px;display:inline-flex;align-items:center;
  color:var(--muted);font-weight:600}
.tabs a.on{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}
.empty{color:var(--muted);padding:26px 0;text-align:center}

/* ---------- Object detail ---------- */
.object-hero{position:relative;overflow:hidden;color:var(--on-space);
  background:radial-gradient(700px 300px at 88% 0%,rgba(79,140,255,.26),transparent 65%),
             linear-gradient(135deg,var(--space-0),var(--space-1) 60%,var(--space-2));
  border-bottom:1px solid rgba(255,255,255,.08)}
.object-hero::before{content:"";position:absolute;inset:0;opacity:.5;pointer-events:none;
  background-image:radial-gradient(1.5px 1.5px at 20% 30%,#fff,transparent),
   radial-gradient(1px 1px at 62% 22%,#fff,transparent),
   radial-gradient(1.5px 1.5px at 82% 72%,#cfe0ff,transparent),
   radial-gradient(1px 1px at 38% 82%,#fff,transparent)}
.object-hero .wrap{position:relative;z-index:1;padding:34px 22px 30px}
.object-hero h1{color:#fff;font-size:clamp(30px,4.4vw,46px);margin:10px 0 8px}
.object-hero .obj-tag{font-size:12px;letter-spacing:.12em;text-transform:uppercase;
  color:#9fc2ff;font-weight:700}
.object-hero .lead{color:var(--on-space-muted);max-width:78ch;margin:0 0 16px}
.object-hero .chips{margin:0}
.object-hero .pill{background:rgba(255,255,255,.10);color:#dce9ff;
  border:1px solid rgba(255,255,255,.16)}
.object-hero .hazard{background:rgba(217,79,79,.22);color:#ffc9c9;
  border:1px solid rgba(255,160,160,.35)}
.object-hero__media{display:flex;gap:22px;align-items:flex-start;flex-wrap:wrap}
.object-hero__media img{width:190px;height:190px;object-fit:cover;border-radius:16px;
  border:1px solid rgba(255,255,255,.16);background:#0a1428;flex:0 0 190px}
.obj-img{max-width:100%;height:auto;border-radius:var(--radius);
  border:1px solid var(--line);margin:12px 0;background:var(--surface)}
.param-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));
  gap:12px;margin:14px 0 22px}
.param{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:13px 16px;box-shadow:var(--shadow-1);min-width:0}
.param .k{font-size:12px;color:var(--muted);font-weight:600}
.param .v{font-size:17px;font-weight:750;margin-top:4px;letter-spacing:-.02em;
  overflow-wrap:anywhere}
.desc-box{background:var(--surface);border:1px solid var(--line);
  border-inline-start:3px solid var(--accent);border-radius:var(--radius);
  padding:16px 20px;margin:14px 0;line-height:1.8;box-shadow:var(--shadow-1)}
.wiki-label{font-size:11.5px;font-weight:750;color:var(--accent);letter-spacing:.09em;
  text-transform:uppercase;margin:22px 0 6px}
.auto-analysis{margin:22px 0 8px}
.auto-analysis h2{font-size:20px;margin:30px 0 12px;padding-bottom:8px;
  border-bottom:1px solid var(--line)}
.auto-analysis p{margin:0 0 13px;line-height:1.85;font-size:15.5px}
.auto-method{margin:18px 0 26px;padding:12px 16px;border:1px solid var(--line);
  border-radius:var(--radius);background:var(--surface-2)}
.auto-method summary{min-height:36px;display:flex;align-items:center;cursor:pointer;
  font-weight:700;font-size:14px}
.auto-method p{margin:10px 0 2px;font-size:13.5px;color:var(--muted);line-height:1.75}
.orbit-wrap{display:flex;justify-content:center;margin:10px 0}
.orbit-wrap canvas{max-width:100%}
.toc{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:14px 18px;margin:18px 0 26px;box-shadow:var(--shadow-1)}
.toc strong{display:block;font-size:12px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted);margin-bottom:8px}
.toc ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.toc a{display:inline-flex;align-items:center;min-height:34px;padding:4px 12px;
  border-radius:8px;background:var(--surface-2);font-size:13px;font-weight:600;color:var(--fg)}
.toc a:hover{text-decoration:none;background:var(--accent-soft);color:var(--accent)}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(158px,1fr));
  gap:12px;margin:12px 0 20px}
.rel-card{display:block;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;text-decoration:none;color:var(--fg);background:var(--surface);
  box-shadow:var(--shadow-1);transition:transform .18s,box-shadow .18s,border-color .18s}
.rel-card:hover{text-decoration:none;border-color:#a9c6ff;transform:translateY(-3px);
  box-shadow:var(--shadow-2)}
.rel-img{width:100%;height:96px;object-fit:cover;background:var(--surface-2);display:block}
.rel-name{padding:10px 11px 2px;font-weight:700;font-size:14px;line-height:1.3;
  word-break:break-word}
.rel-meta{padding:0 11px 11px;font-size:12px;color:var(--muted)}
.keyfacts{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;
  margin:16px 0 24px}
.keyfact{background:linear-gradient(160deg,var(--surface),var(--surface-2));
  border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.keyfact .k{font-size:11.5px;text-transform:uppercase;letter-spacing:.07em;
  color:var(--muted);font-weight:700}
.keyfact .v{font-size:20px;font-weight:800;letter-spacing:-.03em;margin-top:3px}
.keyfact .u{font-size:12px;color:var(--muted);font-weight:600}
.provenance{background:var(--surface);border:1px dashed var(--line-strong);
  border-radius:var(--radius);padding:16px 20px;margin:28px 0 6px;font-size:13.5px;
  color:var(--muted);line-height:1.8}
.provenance strong{color:var(--fg)}
.provenance a{font-weight:600}

/* ---------- Ad slot (AdSense compliant) ---------- */
.adslot{margin:34px 0 12px;padding:12px 14px 14px;text-align:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-1);min-height:110px}
.adslot__label{display:block;font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--faint);font-weight:700;margin-bottom:8px}
.adslot ins.adsbygoogle{display:block;width:100%;min-height:90px}
.ad{margin:18px 0;text-align:center;min-height:0}
.ad-label{font-size:11px;color:var(--faint);letter-spacing:.5px;
  text-transform:uppercase;margin-bottom:4px}

/* ---------- Engagement / continue exploring ---------- */
.continue{margin:38px 0 8px;padding:24px;background:linear-gradient(140deg,#0d1c38,#173561);
  border-radius:var(--radius-lg);color:var(--on-space);position:relative;overflow:hidden}
.continue::after{content:"";position:absolute;inset-inline-end:-60px;top:-70px;width:260px;
  height:260px;border:1px solid rgba(255,255,255,.12);border-radius:50%;
  box-shadow:0 0 0 46px rgba(255,255,255,.035),0 0 0 96px rgba(255,255,255,.025)}
.continue h2{color:#fff;margin:0 0 6px;position:relative;z-index:1}
.continue p{color:var(--on-space-muted);margin:0 0 16px;position:relative;z-index:1}
.continue .chips{margin:0;position:relative;z-index:1}
.continue .chip{background:rgba(255,255,255,.10);border-color:rgba(255,255,255,.22);
  color:#eaf2ff;min-height:38px}
.continue .chip:hover{background:rgba(255,255,255,.20);color:#fff;border-color:#fff}
.faq{margin:30px 0}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:12px 18px;margin:8px 0;box-shadow:var(--shadow-1)}
.faq summary{min-height:36px;display:flex;align-items:center;cursor:pointer;
  font-weight:700;font-size:15px}
.faq details p{margin:8px 0 4px;color:var(--muted);line-height:1.8;font-size:14.5px}

/* ---------- Footer ---------- */
footer.site{background:var(--space-0);color:var(--on-space-muted);
  border-top:1px solid rgba(255,255,255,.09);padding:34px 0 26px;font-size:13.5px}
footer.site a{color:#bcd2f5;display:inline-flex;align-items:center;
  min-height:34px;min-width:32px;padding:4px 2px}
footer.site a:hover{color:#fff}
footer.site h3{color:#fff;font-size:13px;letter-spacing:.1em;text-transform:uppercase;
  margin:0 0 10px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:30px}
.footer-grid p{max-width:44ch;line-height:1.8}
.footer-links{display:flex;flex-wrap:wrap;gap:2px 16px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.10);margin-top:26px;
  padding-top:16px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:12.5px}
.footer-bottom a{min-height:32px}
footer.site details{margin-top:8px}
footer.site summary{cursor:pointer;min-height:34px;display:flex;align-items:center}

/* ---------- Touch targets (no layout breakage) ---------- */
a{min-height:32px;min-width:32px}
header.site .brand,header.site a.brand{display:inline-flex;align-items:center;
  justify-content:center;min-height:40px}
.nav2 a,.lang-switch a,.tabs a,.chip,.toc a{display:inline-flex;align-items:center;
  justify-content:center;min-height:34px;min-width:32px}
footer.site a{display:inline-flex;align-items:center;justify-content:center;
  min-height:34px;min-width:32px}
main p a,main .breadcrumb a,main .toplist a,main .guide-body a,
main .card p a,.auto-method summary a{display:inline-flex;align-items:center;
  padding:6px 2px;min-height:32px;min-width:32px}
main a.co,main a.rel-card{display:block}
main a.btn-primary,main a.btn-ghost,main a.chip{display:inline-flex}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:38px}

/* ---------- Responsive ---------- */
@media (max-width:960px){
  .hero__inner{grid-template-columns:1fr;gap:8px;padding:38px 0 28px;min-height:0}
  .hero__art{height:150px;order:-1;opacity:.75}
  .hero__art svg{max-width:250px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .wrap{padding:0 16px}
  .grid,.param-grid{grid-template-columns:1fr}
  header.site{position:static}
  .topbar{padding:12px 0 8px;gap:10px}
  .brand{font-size:19px}
  .brand small{display:none}
  .header-tools{width:100%}
  .search{width:100%}
  .search input{flex:1;width:auto;max-width:none}
  .lang-switch{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;
    padding-bottom:8px;scrollbar-width:thin}
  .lang-switch a{flex:0 0 auto}
  .nav2{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;
    padding-bottom:9px;scrollbar-width:thin}
  .nav2 a{flex:0 0 auto;white-space:nowrap}
  .hero__inner{padding:26px 0 20px}
  .hero h1{font-size:31px}
  .hero p.hero__sub{font-size:15px}
  .hero__art{display:none}
  .hero__stats{grid-template-columns:minmax(0,1fr) minmax(0,1fr);margin-bottom:24px}
  .hero__stat{padding:12px 14px;min-width:0}
  .hero__stat .v{font-size:21px}
  .object-hero .wrap{padding:24px 16px}
  .object-hero__media img{width:120px;height:120px;flex:0 0 120px}
  .object-hero h1{font-size:29px}
  .keyfacts,.summary{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .keyfact .v{font-size:17px}
  .related-grid{grid-template-columns:repeat(auto-fill,minmax(130px,1fr))}
  .footer-grid{grid-template-columns:1fr}
  table.fs{display:block;overflow-x:auto;white-space:nowrap}
  .bar-row{grid-template-columns:76px 1fr 52px}
  .continue{padding:20px}
  main{padding:22px 0 44px}
}
@media (max-width:380px){
  .hero__stats,.keyfacts,.summary{grid-template-columns:1fr}
}
[dir="rtl"] .co::after{content:"←";inset-inline-end:auto;inset-inline-start:15px}
[dir="rtl"] .hero__inner{direction:rtl}
[dir="rtl"] .search{flex-direction:row}
[dir="rtl"] .toplist li::before{text-align:start}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important;
    transform:none!important}
  .co:hover,.rel-card:hover,.btn-primary:hover{transform:none}
}
@media print{
  header.site,footer.site,.adslot,.continue,.scroll-progress,.nav2,.lang-switch{display:none}
  body{background:#fff}
}

/* ---------- Object-page specifics ---------- */
.object-hero .breadcrumb{color:var(--on-space-muted)}
.object-hero .breadcrumb a{color:#9fc2ff;min-height:32px;display:inline-flex;align-items:center}
.object-hero .breadcrumb a:hover{color:#fff}
.orbit-svg{max-width:100%;height:auto}
.orbit-note{text-align:center;font-size:13px;margin:8px 0 0}
.subtle{color:var(--muted);font-size:12px}
.subtle-note{font-size:12px;margin-top:10px}
.orbit3d{display:block;width:100%;height:340px;max-width:440px;background:#0f172a;
  border-radius:10px;cursor:grab;touch-action:none}
.toc a{white-space:normal;text-align:start}
.section-head .eyebrow{color:var(--accent-dark)}
.hero__stat .k{white-space:normal;overflow:visible;text-overflow:clip}

/* ---------- v2.1 hardening (2026-11-04 audit fixes) ---------- */
/* 🔴 skip-link 用 left:-9999px 会在 RTL 下把文档宽度撑到 9999px，
      造成阿拉伯语页面横向溢出。改为移出视口上方，方向无关。 */
.skip-link{left:0;top:-120px;transition:top .15s}
.skip-link:focus{left:0;top:0}
/* 正文里无 class 的纯文本链接（数据来源、说明文字）原本是 inline，
   min-height 不生效 → 触控目标只有 15px。仅对这些容器补 inline-flex，
   不影响 .co / .rel-card 等块级卡片链接。 */
main .provenance a,main .desc-box a,main .card a,main .auto-method a,
main .section-head a,main .empty a,main .guide-body a{
  display:inline-flex;align-items:center;vertical-align:middle;
  padding:4px 2px;min-height:32px;min-width:32px}
main a.co,main a.rel-card{display:block;padding:0}

/* v2.2: brand mark 是 display:block，若父级 <a> 仍是 inline 会把站名挤到下一行 */
header.site .brand > a{display:inline-flex;align-items:center;gap:10px;min-height:40px}
.brand-mark{flex:0 0 34px}

/* v2.3 (2026-11-04): RTL 箭头方向翻转 —— 在从右到左语言下「前进」应指向左 */
.arr{display:inline-block;transition:transform .18s}
[dir="rtl"] .arr{transform:scaleX(-1)}
/* 语言/导航切换 chip 在移动端滚动条内保持足够触控高度（≥32px，符合 WCAG 2.5.8） */
.lang-switch a,.nav2 a{min-height:32px}