:root {
  --quant-ink: #121a24;
  --quant-muted: #5d6977;
  --quant-line: #d9e0e7;
  --quant-paper: #eef2f6;
  --quant-navy: #0d1b26;
  --quant-teal: #087f78;
  --quant-teal-dark: #056761;
  --quant-blue: #2458c5;
  color: var(--quant-ink);
  background: var(--quant-paper);
  font-family: "MiSans", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
  letter-spacing: 0;
  line-height: 1.75;
}
* { box-sizing: border-box; }
body { margin: 0; }
a { color: var(--quant-teal-dark); text-underline-offset: 4px; overflow-wrap: anywhere; }
a:hover { color: var(--quant-blue); }
:focus-visible { outline: 3px solid var(--quant-blue); outline-offset: 4px; }
img { display: block; max-width: 100%; height: auto; }
p { margin: 0 0 18px; overflow-wrap: anywhere; }
h1, h2, h3 { line-height: 1.4; margin: 0; overflow-wrap: anywhere; letter-spacing: 0; }
h1 { font-size: 36px; }
h2 { font-size: 24px; }
h3 { font-size: 19px; }
ul, ol { padding-left: 24px; }
li { padding-left: 4px; margin-bottom: 10px; overflow-wrap: anywhere; }
.container { max-width: 1184px; margin: 0 auto; padding: 0 32px; }
.skip-link { position: absolute; left: 16px; top: -80px; z-index: 20; padding: 10px 18px; background: white; }
.skip-link:focus { top: 8px; }
.site-header { border-bottom: 1px solid var(--quant-line); background: #fff; }
.header-inner { max-width: 1360px; margin: auto; padding: 0 32px; min-height: 78px; display: flex; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--quant-ink); text-decoration: none; font-size: 20px; font-weight: 800; }
.brand img { width: 42px; height: 42px; object-fit: contain; }
.desktop-nav { display: flex; justify-content: center; align-items: center; gap: 26px; margin-left: auto; }
.desktop-nav a, .login { color: var(--quant-muted); text-decoration: none; font-size: 14px; }
.desktop-nav a:hover, .desktop-nav [aria-current], .login:hover { color: var(--quant-teal); }
.login { margin-left: 22px; padding-left: 22px; border-left: 1px solid var(--quant-line); }
.mobile-nav { display: none; }
.home-intro { padding: 64px 0 45px; border-bottom: 1px solid var(--quant-line); background: #f7f9fb; }
.home-intro .container { position: relative; }
.eyebrow { color: var(--quant-teal-dark); font-size: 13px; font-weight: 600; margin-bottom: 12px; }
.home-intro h1 { font-size: 44px; margin-bottom: 8px; }
.home-headline { font-size: 28px; font-weight: 600; margin: 0 0 18px; line-height: 1.5; }
.intro-copy { font-size: 17px; color: var(--quant-muted); max-width: 720px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 24px; margin: 26px 0 20px; }
.primary { display: inline-flex; align-items: center; justify-content: center; gap: 12px; padding: 11px 20px; border: 1px solid var(--quant-teal); border-radius: 6px; background: var(--quant-teal); color: #fff; text-decoration: none; font-weight: 600; font-size: 14px; }
.primary:hover { color: white; background: var(--quant-teal-dark); }
.hero-note { font-size: 13px; color: var(--quant-muted); margin: 0; }
.home-content .content-section { padding-top: 38px; padding-bottom: 38px; }
.product-image { margin: 24px 0 0; max-width: 900px; }
.product-image img { aspect-ratio: 1425 / 891; object-fit: contain; width: 100%; border: 1px solid var(--quant-line); border-radius: 6px; background: #fff; }
figcaption { color: var(--quant-muted); font-size: 12px; margin-top: 9px; }
.breadcrumbs { padding-top: 28px; color: var(--quant-muted); font-size: 12px; }
.breadcrumbs ol { margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; list-style: none; }
.breadcrumbs li { margin: 0; padding: 0; }
.breadcrumbs li:not(:last-child)::after { content: "/"; padding-left: 8px; color: #8993a0; }
.breadcrumbs a { color: var(--quant-muted); text-decoration: none; }
.page-heading { padding: 30px 0 34px; border-bottom: 1px solid var(--quant-line); }
.page-heading h1 { margin-bottom: 18px; max-width: 920px; }
.page-heading > p:not(.eyebrow) { max-width: 800px; color: var(--quant-muted); margin-bottom: 0; font-size: 15px; }
.page-heading .updated { padding-top: 12px; font-size: 12px; }
.document-layout { display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 56px; align-items: start; }
.article { min-width: 0; }
.content-section { padding: 34px 0; border-bottom: 1px solid var(--quant-line); scroll-margin-top: 24px; }
.content-section h2 { margin-bottom: 18px; }
.content-section p:last-child { margin-bottom: 0; }
.content-section p, .content-section li { font-size: 15px; }
.related-links { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-top: 22px; font-size: 14px; }
.related-links a { text-decoration: none; }
.toc { padding: 34px 0; position: sticky; top: 20px; font-size: 13px; }
.toc strong { font-size: 12px; color: var(--quant-muted); }
.toc nav { border-left: 1px solid var(--quant-line); padding-left: 18px; margin: 14px 0 24px; display: grid; gap: 12px; }
.toc a { text-decoration: none; color: var(--quant-muted); }
.toc a:hover, .toc .toc-action { color: var(--quant-teal-dark); }
.resource-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.resource { padding: 22px; min-height: 170px; border: 1px solid var(--quant-line); border-radius: 6px; background: #fff; color: var(--quant-ink); text-decoration: none; display: flex; flex-direction: column; }
.resource:hover { border-color: var(--quant-teal); }
.resource h3 { margin-bottom: 10px; }
.resource p { color: var(--quant-muted); font-size: 14px; margin: 0 0 8px; }
.resource-arrow { margin-top: auto; color: var(--quant-teal); font-size: 20px; }
.table-scroll { overflow-x: auto; max-width: 100%; margin: 22px 0; }
table { border-collapse: collapse; width: 100%; font-size: 13px; background: #fff; }
th, td { border-bottom: 1px solid var(--quant-line); padding: 13px 16px; text-align: left; vertical-align: top; overflow-wrap: anywhere; }
th { font-weight: 600; }
thead { background: #e5ebf0; }
tbody th { width: 32%; min-width: 160px; }
caption { text-align: left; color: var(--quant-muted); font-size: 12px; padding-bottom: 10px; }
pre { margin: 24px 0; padding: 22px; border-radius: 6px; background: var(--quant-navy); color: #e5f0f4; font: 13px/1.8 Consolas, "Cascadia Code", monospace; white-space: pre-wrap; overflow-wrap: anywhere; }
code { font: inherit; }
.glossary, .experiment-fields { margin: 16px 0 0; }
.glossary > div, .experiment-fields > div { display: grid; grid-template-columns: 160px minmax(0, 1fr); gap: 18px; padding: 15px 0; border-bottom: 1px solid var(--quant-line); font-size: 14px; }
dt { font-weight: 600; overflow-wrap: anywhere; }
dd { margin: 0; overflow-wrap: anywhere; }
.empty-state { padding: 24px 0; border-top: 1px solid var(--quant-line); border-bottom: 1px solid var(--quant-line); }
.empty-state h3 { margin-bottom: 12px; }
.empty-state p { color: var(--quant-muted); }
.strategy-row { padding: 24px 0; border-top: 1px solid var(--quant-line); }
.strategy-row h3 { margin: 12px 0 10px; }
.strategy-row h3 a { text-decoration: none; }
.strategy-row p { color: var(--quant-muted); }
.strategy-row .strategy-summary { display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 3; overflow: hidden; }
.record-meta, .tags { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; font-size: 12px; }
.record-meta { color: var(--quant-muted); }
.tags span { background: #e2e9ef; color: #445463; padding: 3px 9px; border-radius: 3px; overflow-wrap: anywhere; max-width: 100%; }
.evidence-badge { color: var(--quant-teal-dark); }
.tag-groups { display: grid; gap: 8px; margin-top: 14px; }
.tag-group { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 12px; }
.tag-label { color: var(--quant-muted); font-size: 12px; }
.tag-note, .evidence-note { color: var(--quant-muted); font-size: 13px !important; line-height: 1.7; }
.experiment { border-top: 1px solid var(--quant-line); padding-top: 24px; margin-top: 24px; }
.experiment h3 { font-size: 17px; margin-bottom: 16px; }
.experiment-metrics { table-layout: fixed; }
.experiment-metrics th, .experiment-metrics td { padding: 12px 8px; }
.experiment-config { margin: 18px 0; }
.experiment-config summary { cursor: pointer; color: var(--quant-teal); font-size: 14px; }
.overview-counts { display: flex; flex-wrap: wrap; gap: 16px 32px; margin: 18px 0; }
.overview-counts dt { color: var(--quant-muted); font-size: 12px; }
.overview-counts dd { font-size: 22px; font-weight: 600; }
.experiment-links { font-size: 13px; }
.experiment-links span, .config-identity { color: var(--quant-muted); overflow-wrap: anywhere; }
.config-identity { font-size: 12px !important; }
.source-link { margin-top: 18px; font-size: 14px !important; }
.pagination { display: flex; flex-wrap: wrap; gap: 10px; padding: 26px 0; }
.pagination a { min-width: 40px; height: 40px; display: grid; place-items: center; text-decoration: none; border: 1px solid var(--quant-line); border-radius: 4px; background: #fff; }
.pagination [aria-current] { background: var(--quant-teal); color: #fff; border-color: var(--quant-teal); }
.closing-band { background: #e3edef; margin-top: 44px; border-top: 1px solid #d4e2e5; border-bottom: 1px solid #d4e2e5; padding: 30px 0; }
.closing-band .container { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.closing-band h2 { font-size: 20px; margin-bottom: 8px; }
.closing-band p { color: var(--quant-muted); font-size: 14px; margin: 0; }
.closing-band .primary { flex-shrink: 0; }
.site-footer { background: #fff; padding: 36px 0 24px; }
.footer-brand strong { font-size: 19px; }
.footer-brand p { color: var(--quant-muted); font-size: 12px; margin-top: 6px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 10px 24px; font-size: 12px; margin-bottom: 22px; }
.site-footer nav a { text-decoration: none; color: var(--quant-muted); }
.risk-note { font-size: 11px; color: var(--quant-muted); padding-top: 18px; border-top: 1px solid var(--quant-line); margin: 0; }
@media (min-width: 1600px) {
  .home-intro { padding-top: 70px; padding-bottom: 48px; }
}
@media (max-width: 920px) {
  .desktop-nav { gap: 16px; }
  .header-inner { gap: 14px; padding: 0 24px; }
  .brand { font-size: 18px; }
  .login { padding-left: 14px; margin-left: 0; }
  .document-layout { gap: 32px; grid-template-columns: minmax(0, 1fr) 170px; }
}
@media (max-width: 720px) {
  .container { padding: 0 20px; }
  .header-inner { min-height: 66px; padding: 0 20px; position: relative; }
  .brand { font-size: 17px; gap: 8px; }
  .brand img { width: 34px; height: 34px; }
  .desktop-nav { display: none; }
  .login { margin-left: auto; border: 0; font-size: 13px; }
  .mobile-nav { display: block; font-size: 13px; }
  .mobile-nav summary { cursor: pointer; padding: 8px 4px; list-style-position: inside; }
  .mobile-nav nav { position: absolute; top: calc(100% - 1px); left: 0; right: 0; z-index: 5; background: #fff; border-bottom: 1px solid var(--quant-line); padding: 14px 20px; display: grid; gap: 14px; }
  .mobile-nav nav a { text-decoration: none; color: var(--quant-ink); }
  .home-intro { padding: 38px 0 32px; }
  .home-intro h1 { font-size: 34px; }
  .home-headline { font-size: 23px; max-width: 330px; }
  .intro-copy { font-size: 15px; }
  .eyebrow { font-size: 12px; }
  .hero-actions { gap: 18px; margin: 22px 0 18px; font-size: 14px; }
  .hero-note { font-size: 12px; }
  h1 { font-size: 27px; }
  h2 { font-size: 21px; }
  h3 { font-size: 17px; }
  .page-heading { padding: 24px 0 28px; }
  .breadcrumbs { padding-top: 20px; }
  .document-layout { display: flex; flex-direction: column; gap: 0; }
  .toc { order: -1; position: static; width: 100%; padding: 20px 0; border-bottom: 1px solid var(--quant-line); }
  .toc nav { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 10px 0 14px; border: 0; padding: 0; }
  .content-section, .home-content .content-section { padding: 28px 0; }
  .content-section p, .content-section li { font-size: 14px; }
  .resource-grid { grid-template-columns: 1fr; gap: 12px; }
  .resource { min-height: 156px; padding: 20px; }
  .glossary > div, .experiment-fields > div { grid-template-columns: 1fr; gap: 6px; }
  th, td { padding: 12px; }
  tbody th { min-width: 128px; }
  pre { font-size: 12px; padding: 16px; }
  .closing-band { margin-top: 30px; }
  .closing-band .container { align-items: flex-start; flex-direction: column; gap: 18px; }
  .closing-band h2 { font-size: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
}