@charset "UTF-8";

:root {
  color-scheme: light;
  --bg: #f7f8f5;
  --panel: #ffffff;
  --line: #d7dfda;
  --ink: #202d27;
  --muted: #53625c;
  --accent: #176b51;
  --warm: #9a512b;
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  font-synthesis: none;
  scroll-padding-top: 80px;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); line-height: 1.75; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
a, button { touch-action: manipulation; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.wrap { max-width: 1110px; padding-inline: 32px; margin-inline: auto; }
.skip { position: fixed; top: -80px; left: 12px; z-index: 100; background: white; padding: 10px 18px; border: 1px solid var(--accent); }
.skip:focus { top: 10px; }
.header { border-bottom: 1px solid var(--line); background: var(--bg); }
.nav { min-height: 72px; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-size: 19px; font-weight: 650; letter-spacing: -.4px; }
.brand img { width: 29px; height: 29px; }
.nav-links { display: flex; gap: 25px; margin-left: auto; color: var(--muted); font-size: 14px; }
.nav-end { display: flex; gap: 22px; align-items: center; font-size: 14px; }
.nav-end button { background: none; border: 1px solid var(--line); padding: 4px 10px; border-radius: 3px; color: var(--ink); }
.nav a:hover, .footer a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
.hero { padding-block: 64px 44px; }
.eyebrow { color: var(--muted); font-size: 13px; font-weight: 500; }
h1 { font-size: clamp(31px, 4vw, 44px); line-height: 1.3; letter-spacing: -1px; font-weight: 650; max-width: 870px; margin: 13px 0 20px; }
.hero-description { max-width: 750px; font-size: 17px; color: var(--muted); margin: 0; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 22px; margin-top: 26px; }
.button { display: inline-flex; align-items: center; justify-content: center; padding: 9px 17px; border: 1px solid var(--line); border-radius: 3px; font-size: 14px; font-weight: 550; }
.primary { background: var(--accent); color: white; border-color: var(--accent); }
.primary:hover { background: #10533e; }
.secondary { background: transparent; }
.secondary:hover { border-color: var(--accent); color: var(--accent); }
.text-link { color: var(--accent); font-size: 14px; text-decoration: underline; text-underline-offset: 4px; }
.hero-note { color: var(--muted); font-size: 12px; margin: 21px 0 0; }
.playground-section { padding-block: 38px 41px; border-block: 1px solid var(--line); background: #eef2ee; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 23px; }
h2 { font-size: 25px; font-weight: 600; letter-spacing: -.4px; line-height: 1.4; margin: 6px 0 0; }
.section-head p { max-width: 450px; font-size: 13px; color: var(--muted); margin: 0; }
.demo-tabs { display: flex; border-bottom: 1px solid var(--line); gap: 8px; }
.demo-tabs button { border: 0; border-bottom: 2px solid transparent; background: transparent; color: var(--muted); padding: 10px 14px; font-size: 13px; }
.demo-tabs button.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 650; }
.tab-number { margin-right: 7px; font-variant-numeric: tabular-nums; color: var(--muted); font-size: 11px; }
.demo-panel { display: grid; grid-template-columns: .9fr 1.3fr; border: 1px solid var(--line); border-top: 0; background: var(--panel); }
.demo-explanation { padding: 28px; border-right: 1px solid var(--line); }
.geometry-tag, .version-pill { display: inline-block; font-size: 11px; border: 1px solid var(--line); border-radius: 2px; padding: 2px 7px; color: var(--muted); }
h3 { margin: 13px 0 10px; font-size: 19px; line-height: 1.5; font-weight: 600; }
.demo-explanation p { margin: 0; color: var(--muted); font-size: 14px; }
.demo-insight { border-left: 2px solid var(--line); padding-left: 12px; margin: 19px 0; }
.demo-insight > span { display: none; }
.demo-explanation small { display: block; font-size: 11px; color: var(--muted); margin-top: 9px; }
.demo-data { min-width: 0; padding: 25px 29px 13px; }
.mono, .score-grid strong, code { font-family: Consolas, "SFMono-Regular", monospace; }
.data-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; font-size: 12px; }
.data-source { color: var(--muted); font-size: 11px; }
.score-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 19px 0 22px; }
.score-grid > div { border-left: 2px solid var(--line); padding-left: 12px; }
.score-grid span { display: block; font-size: 12px; color: var(--muted); }
.score-grid strong { display: block; font-size: 28px; font-weight: 500; line-height: 1.5; }
.delta-cell strong { color: #97502d; }
.delta-cell.positive strong { color: var(--accent); }
.curve-head { display: flex; justify-content: space-between; gap: 15px; font-size: 11px; color: var(--muted); }
.curve-head > div { display: flex; gap: 6px; align-items: center; }
.legend-dot { width: 8px; height: 8px; display: inline-block; margin-left: 5px; background: #6c7784; }
.candidate-dot { background: var(--accent); }
#demo-curve { display: block; width: 100%; margin-block: 10px 7px; }
.report-meta { border-top: 1px solid var(--line); padding-top: 8px; display: flex; justify-content: space-between; gap: 10px; font-size: 10px; color: var(--muted); }
.report-meta a { color: var(--accent); white-space: nowrap; }
#demo-status { margin: 8px 0 0; min-height: 17px; font-size: 11px; color: var(--muted); }
.provenance { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; margin: 12px 0 0; font-size: 11px; color: var(--muted); }
.provenance a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.capabilities, .evidence { padding-block: 42px; }
.feature-grid, .evidence-grid { margin: 0; }
.feature-grid > div, .evidence-grid > div { display: grid; grid-template-columns: 160px 1fr; border-top: 1px solid var(--line); padding: 14px 0; gap: 24px; }
dt { font-size: 14px; font-weight: 600; }
dd { margin: 0; font-size: 14px; color: var(--muted); }
.batch-entry { margin-top: 22px; padding: 20px 0 0; border-top: 1px solid var(--line); display: flex; align-items: center; gap: 28px; justify-content: space-between; }
.batch-entry h3 { margin: 0 0 6px; font-size: 17px; }
.batch-entry p { color: var(--muted); font-size: 13px; max-width: 710px; margin: 0; }
.batch-entry .button { flex-shrink: 0; }
.start-section { padding-block: 38px; border-block: 1px solid var(--line); background: var(--panel); }
.start-grid { display: grid; grid-template-columns: .9fr 1.3fr; gap: 25px; }
.code-card { min-width: 0; padding: 20px; border: 1px solid var(--line); }
.card-top { display: flex; gap: 11px; align-items: center; color: var(--muted); font-size: 11px; }
.code-card h3 { font-size: 18px; }
.code-card p { color: var(--muted); font-size: 13px; min-height: 45px; margin-bottom: 17px; }
.code-block { position: relative; background: #f1f4f0; border: 1px solid #e1e6df; border-radius: 2px; padding: 31px 12px 12px; margin-block: 17px; }
pre { overflow-x: auto; margin: 0; max-width: 100%; line-height: 1.8; font-size: 12px; padding-bottom: 5px; tab-size: 2; }
.code-block button { position: absolute; right: 7px; top: 5px; color: var(--accent); background: transparent; border: 1px solid var(--line); border-radius: 2px; padding: 0 6px; font-size: 11px; }
#copy-status { min-height: 20px; font-size: 12px; color: var(--accent); margin: 8px 0; }
.scope-note { display: flex; gap: 35px; border-top: 1px solid var(--line); padding-top: 17px; font-size: 12px; color: var(--muted); }
.small-heading { white-space: nowrap; font-weight: 600; }
.scope-note p { margin: 0; }
.evidence-foot { margin: 14px 0 0; color: var(--muted); font-size: 11px; }
.ecosystem-section { border-block: 1px solid var(--line); }
.ecosystem { padding-block: 32px; display: grid; grid-template-columns: 1fr 1fr; gap: 70px; }
.ecosystem p { color: var(--muted); font-size: 13px; max-width: 420px; }
.ecosystem-links a { display: grid; grid-template-columns: 1fr 20px; padding: 10px 0; border-bottom: 1px solid var(--line); gap: 0 10px; font-size: 14px; }
.ecosystem-links a:hover { color: var(--accent); }
.ecosystem-links small { grid-column: 1; font-size: 11px; color: var(--muted); }
.ecosystem-links b { grid-column: 2; grid-row: 1 / 3; align-self: center; color: var(--accent); font-weight: 400; }
.footer { padding-block: 26px 36px; display: flex; justify-content: space-between; align-items: center; gap: 30px; }
.footer .brand { font-size: 16px; }
.footer p { font-size: 11px; color: var(--muted); margin: 7px 0 0; }
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; font-size: 11px; color: var(--muted); }
@media (max-width: 740px) {
  .wrap { padding-inline: 20px; }
  .nav { min-height: 62px; gap: 15px; }
  .brand { font-size: 17px; }
  .nav-links { display: none; }
  .nav-end { margin-left: auto; gap: 14px; font-size: 12px; }
  .hero { padding-block: 36px 29px; }
  h1 { font-size: 31px; letter-spacing: -.5px; }
  .hero-description { font-size: 15px; }
  .hero-note { font-size: 11px; }
  .button, .text-link { font-size: 13px; }
  .section-head { display: block; margin-bottom: 19px; }
  h2 { font-size: 23px; }
  .section-head p { margin-top: 10px; }
  .section-head > .text-link { display: inline-block; margin-top: 12px; }
  .demo-tabs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; }
  .demo-tabs button { font-size: 11px; line-height: 1.5; padding: 9px 5px; }
  .tab-number { display: none; }
  .demo-panel, .start-grid, .ecosystem { grid-template-columns: 1fr; }
  .demo-explanation { padding: 21px; border-right: 0; border-bottom: 1px solid var(--line); }
  .demo-data { padding: 20px 18px 12px; }
  .demo-insight { margin-block: 12px; }
  .demo-explanation h3 { margin-top: 8px; }
  .score-grid strong { font-size: 25px; }
  .report-meta { font-size: 9px; }
  .capabilities, .evidence { padding-block: 30px; }
  .feature-grid > div, .evidence-grid > div { grid-template-columns: 1fr; gap: 3px; padding-block: 12px; }
  .batch-entry { display: block; }
  .batch-entry .button { margin-top: 15px; }
  .start-grid { gap: 15px; }
  .code-card { padding: 17px; }
  .code-card p { min-height: 0; }
  .scope-note { display: block; }
  .scope-note p { margin-top: 5px; }
  .ecosystem { gap: 12px; padding-block: 28px; }
  .footer { display: block; padding-block: 24px; }
  .footer-links { margin-top: 18px; }
}
@media (prefers-reduced-motion: reduce) { :root { scroll-behavior: auto; } }