/* show.dytchem.cn/bloch — dark, technical, data-first.
   Palette follows the house dark-SaaS tokens; the two sequence colours are
   data colours (one per family), everything else stays neutral. */
:root{
  --canvas:#010102;
  --surface-1:#0f1011;
  --surface-2:#141516;
  --surface-3:#18191a;
  --hairline:#23252a;
  --hairline-strong:#34343a;
  --ink:#f7f8f8;
  --ink-muted:#d0d6e0;
  --ink-subtle:#8a8f98;
  --ink-tertiary:#62666d;
  --primary:#5e6ad2;
  --primary-hover:#828fff;
  --ours:#828fff;
  --ours-soft:#b9c0ff;
  --lyc:#e0a458;
  --lyc-soft:#f2d3a4;
  --danger:#e5484d;
  --radius:10px;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--canvas);color:var(--ink)}
body{
  font:14px/1.6 Inter,"Helvetica Neue",-apple-system,BlinkMacSystemFont,"Segoe UI",
       "Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
}
.mono{font-family:var(--mono);font-size:.95em;font-variant-numeric:tabular-nums}
.dim{color:var(--ink-tertiary)}
a{color:var(--ink-muted);text-decoration:none;border-bottom:1px solid transparent}
a:hover{color:var(--ink);border-bottom-color:var(--hairline-strong)}
h1,h2,h3{margin:0;font-weight:600;letter-spacing:-.02em}
h1{font-size:clamp(26px,3.4vw,40px);letter-spacing:-.03em;line-height:1.15}
h2{font-size:20px;letter-spacing:-.02em}
h3{font-size:14px;letter-spacing:0}
p{margin:0 0 8px}
sup,sub{font-size:.72em}

/* ── top bar ─────────────────────────────────────────────── */
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:12px 24px;border-bottom:1px solid var(--hairline);
  position:sticky;top:0;background:rgba(1,1,2,.86);backdrop-filter:blur(8px);z-index:20;
}
.brand{font-family:var(--mono);font-size:13px;color:var(--ink-muted);display:flex;align-items:center;gap:8px}
.brand .sep{color:var(--ink-tertiary)}
.brand .dot{width:8px;height:8px;border-radius:50%;background:var(--primary);display:inline-block}
.topbar nav{display:flex;gap:18px;font-size:13px}
.topbar nav a{color:var(--ink-subtle)}
.topbar nav a.active,.topbar nav a:hover{color:var(--ink);border-bottom-color:var(--primary)}

main{max-width:1360px;margin:0 auto;padding:28px 24px 64px}
section{margin-bottom:26px}
.panel{background:var(--surface-1);border:1px solid var(--hairline);border-radius:var(--radius)}

/* ── hero ────────────────────────────────────────────────── */
.hero{max-width:1000px}
.eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-tertiary);margin-bottom:10px}
.lede{color:var(--ink-muted);font-size:14.5px;margin-top:14px}
.key{font-weight:600}
.k-ours{color:var(--ours)}
.k-lyc{color:var(--lyc)}

/* ── controls ────────────────────────────────────────────── */
.controls{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;padding:16px 18px}
.ctl{display:flex;flex-direction:column;gap:8px}
.ctl.wide{grid-column:span 2}
.ctl label{font-size:12px;color:var(--ink-subtle);letter-spacing:.02em}
.ctl .val{color:var(--ink);margin-left:6px}
.ctl .hint{font-size:11.5px;color:var(--ink-tertiary);line-height:1.5}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.seg{display:flex;flex-wrap:wrap;gap:4px}
.seg button,.btn{
  font:inherit;font-size:12.5px;color:var(--ink-muted);background:var(--surface-2);
  border:1px solid var(--hairline);border-radius:8px;padding:5px 10px;cursor:pointer;
  transition:background .12s,color .12s,border-color .12s;
}
.seg button:hover,.btn:hover{background:var(--surface-3);color:var(--ink)}
.seg button.on{background:var(--surface-3);border-color:var(--primary);color:var(--ink)}
.seg.small button{font-size:11.5px;padding:4px 8px}
.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-hover);border-color:var(--primary-hover)}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:4px;border-radius:2px;
  background:linear-gradient(90deg,var(--hairline-strong),var(--hairline));outline:none}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;border-radius:50%;
  background:var(--primary);cursor:pointer;border:2px solid #0b0b0c}
input[type=range]::-moz-range-thumb{width:12px;height:12px;border-radius:50%;background:var(--primary);
  cursor:pointer;border:2px solid #0b0b0c}

/* ── spheres ─────────────────────────────────────────────── */
.spheres{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.sphere-panel{display:flex;flex-direction:column;overflow:hidden}
.sphere-panel figcaption{display:flex;align-items:center;gap:10px;padding:10px 14px;
  border-bottom:1px solid var(--hairline);font-size:12.5px}
.tag{font-size:11.5px;font-weight:600;padding:2px 8px;border-radius:6px;border:1px solid transparent}
.tag-ours{color:var(--ours);background:rgba(94,106,210,.12);border-color:rgba(130,143,255,.35)}
.tag-lyc{color:var(--lyc);background:rgba(224,164,88,.12);border-color:rgba(224,164,88,.35)}
.sphere-panel .meta{color:var(--ink-tertiary);margin-left:auto}
.sphere-panel canvas{width:100%;height:clamp(260px,34vh,380px);display:block;cursor:grab}
.sphere-panel canvas:active{cursor:grabbing}
.readout{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--hairline)}
.readout>div{padding:8px 12px;display:flex;flex-direction:column;gap:2px;border-right:1px solid var(--hairline)}
.readout>div:last-child{border-right:0}
.readout span{font-size:11px;color:var(--ink-tertiary)}
.readout b{font-size:13px;font-weight:500;color:var(--ink)}

/* ── timeline strip ──────────────────────────────────────── */
.transport{padding:12px 14px}
.timeline-wrap canvas{width:100%;height:120px;display:block}
.legend{display:flex;gap:20px;flex-wrap:wrap;font-size:11.5px;color:var(--ink-subtle);
  padding:6px 4px 0;border-top:1px solid var(--hairline);margin-top:8px}
.sw{display:inline-block;width:18px;height:3px;border-radius:2px;margin-right:6px;vertical-align:middle}
.sw-z-ours{background:var(--ours)}
.sw-x-ours{background:repeating-linear-gradient(90deg,var(--ours-soft) 0 4px,transparent 4px 7px)}
.sw-ideal{background:repeating-linear-gradient(90deg,var(--ink-tertiary) 0 2px,transparent 2px 5px)}

/* ── stats ───────────────────────────────────────────────── */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1px;background:var(--hairline);
  border-radius:var(--radius);overflow:hidden}
.stat{background:var(--surface-1);padding:12px 14px;display:flex;flex-direction:column;gap:3px}
.stat span{font-size:11px;color:var(--ink-tertiary)}
.stat b{font-family:var(--mono);font-size:15px;font-weight:500}
.stat b.ours{color:var(--ours)}
.stat b.lyc{color:var(--lyc)}
.stat i{font-style:normal;font-size:11px;color:var(--ink-tertiary)}

/* ── blocks ──────────────────────────────────────────────── */
.block{margin-top:34px}
.block-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:6px;flex-wrap:wrap}
.sub{color:var(--ink-subtle);font-size:12.5px;margin:6px 0 12px;max-width:1000px}
.block figure{margin:0;padding:12px}
.block figure canvas{width:100%;display:block}
#cv-static{height:clamp(340px,52vh,560px);cursor:grab}
#cv-static:active{cursor:grabbing}
#cv-pulse{height:220px}
#cv-eps{height:360px}
#cv-cost{height:300px}
.block figcaption{padding-top:8px;font-size:11.5px;color:var(--ink-tertiary);border-top:1px solid var(--hairline);margin-top:10px}

/* ── notes ───────────────────────────────────────────────── */
.note-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px;margin-top:12px}
.note{padding:14px 16px}
.note h3{margin-bottom:8px;color:var(--ink)}
.note p{font-size:12.5px;color:var(--ink-muted)}
.note .eq{background:var(--surface-2);border:1px solid var(--hairline);border-radius:6px;padding:6px 8px;
  font-size:11.5px;color:var(--ink-muted);overflow-x:auto;white-space:nowrap}

footer{border-top:1px solid var(--hairline);padding:18px 24px 40px;color:var(--ink-subtle);
  font-size:12px;display:flex;flex-direction:column;gap:6px;max-width:1360px;margin:0 auto}

@media (max-width:900px){
  .spheres{grid-template-columns:1fr}
  .ctl.wide{grid-column:span 1}
  main{padding:20px 14px 48px}
}