:root {
  --ink: #101613;
  --ink-soft: #18221d;
  --panel: #edf0e7;
  --paper: #f8f8f1;
  --line: #cdd4c8;
  --line-dark: #344039;
  --muted: #657168;
  --acid: #c8ed3c;
  --acid-deep: #8fb418;
  --amber: #f0a638;
  --red: #e45d45;
  --blue: #76b5c5;
  --serif: "Songti SC", "STSong", "Noto Serif SC", Georgia, serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", Verdana, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sidebar: 284px;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: var(--ink); color: var(--ink); font-family: var(--sans); }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--acid-deep); outline-offset: 3px; }
.grain { position: fixed; inset: 0; z-index: 50; pointer-events: none; opacity: .11; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.92' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.42'/%3E%3C/svg%3E"); }
.skip-link { position: fixed; z-index: 100; top: 10px; left: 10px; padding: 10px 14px; background: var(--acid); color: var(--ink); font-weight: 900; transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.docs-shell { min-height: 100vh; display: grid; grid-template-columns: var(--sidebar) minmax(0, 1fr); }
.sidebar { position: sticky; top: 0; z-index: 20; height: 100vh; padding: 25px 20px 20px; display: flex; flex-direction: column; gap: 23px; overflow: auto; background: var(--ink); color: var(--paper); }
.brand { display: flex; gap: 12px; align-items: center; text-decoration: none; color: var(--paper); font-weight: 900; line-height: 1.05; letter-spacing: .055em; }
.brand-glyph, .mobile-brand b { width: 46px; height: 46px; flex: 0 0 auto; display: grid; place-items: center; background: var(--acid); color: var(--ink); font: 900 15px/1 var(--sans); box-shadow: 4px 4px 0 #344616; }
.brand small { display: block; margin-top: 5px; color: #849187; font-size: 8px; letter-spacing: .13em; }
.search-trigger { width: 100%; display: grid; grid-template-columns: auto minmax(0,1fr) auto; gap: 9px; align-items: center; padding: 10px 9px; border: 1px solid var(--line-dark); background: rgba(255,255,255,.035); color: #aeb8af; text-align: left; font-size: 11px; cursor: pointer; }
.search-trigger:hover { border-color: var(--acid); color: var(--paper); }
.search-trigger > span:first-child { color: var(--acid); font: 21px/1 var(--serif); }
kbd { border: 1px solid #46534c; padding: 3px 5px; color: #77847b; background: var(--ink-soft); font: 8px/1 var(--mono); }
.primary-nav { display: grid; gap: 18px; padding-bottom: 20px; }
.nav-group { display: grid; gap: 2px; }
.nav-group-title { margin: 0 8px 6px; color: #58665e; font-size: 9px; line-height: 1; font-weight: 900; letter-spacing: .16em; text-transform: uppercase; }
.nav-link { position: relative; display: grid; grid-template-columns: 25px minmax(0,1fr); gap: 4px; padding: 8px 8px; border-left: 2px solid transparent; color: #aeb8af; text-decoration: none; font-size: 11px; line-height: 1.35; }
.nav-link span { color: #526057; font: 9px/1.5 var(--mono); }
.nav-link:hover { color: var(--paper); background: rgba(255,255,255,.04); }
.nav-link[aria-current="page"] { border-left-color: var(--acid); background: rgba(200,237,60,.07); color: var(--paper); }
.nav-link[aria-current="page"] span { color: var(--acid); }
.sidebar-footer { margin-top: auto; border-top: 1px solid var(--line-dark); padding-top: 16px; color: #87938a; font-size: 9px; line-height: 1.6; }
.sidebar-footer p { display: flex; align-items: center; gap: 7px; margin: 13px 0 7px; }
.sidebar-footer a { text-decoration: none; }
.sidebar-footer a:hover { color: var(--acid); }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--acid-deep); box-shadow: 0 0 0 4px rgba(143,180,24,.14); }
.locale-switch { display: inline-flex; gap: 2px; padding: 3px; border: 1px solid var(--line-dark); }
.locale-switch button { min-width: 40px; padding: 7px 8px; border: 0; background: transparent; color: #849187; font: 800 9px/1 var(--sans); cursor: pointer; }
.locale-switch button[aria-pressed="true"] { background: var(--acid); color: var(--ink); }

.main-canvas { min-width: 0; min-height: 100vh; background: var(--panel); }
.utility-bar { min-height: 59px; display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 0 clamp(24px, 5vw, 80px); border-bottom: 1px solid var(--line); color: var(--muted); font-size: 10px; letter-spacing: .05em; }
.utility-bar p { margin: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.utility-bar p a { text-decoration: none; }
.utility-bar p a:hover { color: var(--ink); }
.utility-bar p b { color: var(--ink); }
.utility-links { display: flex; align-items: center; gap: 17px; flex: 0 0 auto; }
.utility-links span { display: flex; align-items: center; gap: 7px; }
.utility-links i { display: block; width: 7px; height: 7px; border-radius: 50%; background: var(--acid-deep); }
.utility-links a { text-decoration: none; border-bottom: 1px solid var(--line); }
.skill-button { display: inline-flex; align-items: center; gap: 6px; padding: 5px 9px; border: 1px solid var(--line); background: transparent; color: var(--muted); font: 800 9px/1 var(--sans); letter-spacing: .08em; cursor: pointer; }
.skill-button:hover { border-color: var(--acid-deep); color: var(--ink); }
.skill-button::before { content: "⚡"; font-size: 10px; }
.article-grid { display: grid; grid-template-columns: minmax(0, 800px) minmax(150px, 210px); justify-content: center; gap: clamp(45px, 7vw, 110px); padding: clamp(48px, 7vw, 94px) clamp(28px, 6vw, 100px) 100px; }
.doc-article { min-width: 0; }
.doc-kicker { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; color: var(--acid-deep); font: 900 10px/1 var(--sans); letter-spacing: .17em; text-transform: uppercase; }
.doc-kicker::before { content: attr(data-index); display: grid; place-items: center; width: 31px; height: 31px; background: var(--acid); color: var(--ink); letter-spacing: 0; }
.doc-article > h1 { max-width: 750px; margin: 0; font: clamp(46px, 6.4vw, 82px)/.93 var(--serif); letter-spacing: -.072em; text-wrap: balance; }
.doc-article > .lead { max-width: 680px; margin: 26px 0 52px; color: #526057; font-size: 16px; line-height: 1.88; }
.article-body { font-size: 14px; line-height: 1.85; }
.article-body section { margin: 0 0 48px; scroll-margin-top: 28px; }
.article-body h2 { display: grid; grid-template-columns: 42px minmax(0,1fr); align-items: center; gap: 12px; margin: 0 0 19px; padding-top: 13px; border-top: 2px solid var(--ink); font: 31px/1.08 var(--serif); letter-spacing: -.045em; }
.article-body h2::before { content: attr(data-step); display: grid; place-items: center; width: 34px; height: 34px; background: var(--ink); color: var(--acid); font: 800 9px/1 var(--mono); letter-spacing: 0; }
.article-body h3 { margin: 29px 0 10px; font: 22px/1.2 var(--serif); letter-spacing: -.02em; }
.article-body p { margin: 0 0 16px; }
.article-body a { text-decoration-color: var(--acid-deep); text-decoration-thickness: 2px; text-underline-offset: 3px; }
.article-body a:hover { background: var(--acid); }
.article-body ul, .article-body ol { margin: 12px 0 20px; padding-left: 23px; }
.article-body li { padding: 2px 0 4px 4px; }
.article-body li::marker { color: var(--acid-deep); font-weight: 900; }
.article-body code:not(pre code) { padding: 2px 5px; background: #e1e6db; color: #384432; border-bottom: 1px solid #b9c4b1; font: 12px/1.4 var(--mono); overflow-wrap: anywhere; }
.code-block { position: relative; margin: 19px 0 25px; border-left: 4px solid var(--acid); background: var(--ink); color: #dbe4d8; }
.code-label { display: flex; align-items: center; justify-content: space-between; min-height: 37px; padding: 0 10px 0 15px; border-bottom: 1px solid #354139; color: #79867e; font: 8px/1 var(--mono); letter-spacing: .13em; text-transform: uppercase; }
.copy-button { padding: 7px 9px; border: 1px solid #435148; background: transparent; color: #98a49c; font: 800 8px/1 var(--sans); letter-spacing: .07em; cursor: pointer; }
.copy-button:hover { border-color: var(--acid); color: var(--acid); }
pre { margin: 0; padding: 18px 20px 21px; overflow: auto; font: 12px/1.72 var(--mono); tab-size: 2; }
pre code { color: inherit; }
.callout { display: grid; grid-template-columns: 44px minmax(0,1fr); gap: 15px; margin: 21px 0 27px; padding: 17px; border: 1px solid #b3c49f; background: #e3e9d9; }
.callout::before { content: attr(data-mark); display: grid; place-items: center; width: 44px; min-height: 44px; background: var(--acid); color: var(--ink); font: 900 11px/1 var(--sans); }
.callout.warning { border-color: #d9b06e; background: #f7ecd8; }
.callout.warning::before { background: var(--amber); }
.callout strong { display: block; margin-bottom: 4px; font-size: 12px; }
.callout p { margin: 0; color: #51604e; font-size: 12px; line-height: 1.65; }
.architecture-stack { margin: 22px 0; display: grid; gap: 4px; max-width: 520px; }
.architecture-stack div { position: relative; padding: 12px 15px; background: #e0e5da; border-left: 4px solid var(--acid-deep); font: 800 11px/1.2 var(--mono); }
.architecture-stack div:nth-child(even) { margin-left: 28px; background: #f7f8f0; border-left-color: var(--blue); }
.comparison-table { width: 100%; margin: 18px 0 28px; border-collapse: collapse; font-size: 12px; }
.comparison-table th, .comparison-table td { padding: 11px 12px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.comparison-table th { background: var(--ink); color: var(--paper); font-size: 10px; letter-spacing: .07em; }
.comparison-table td:first-child { font-weight: 800; }
.next-page { display: grid; grid-template-columns: minmax(0,1fr) auto; align-items: center; gap: 20px; margin-top: 68px; padding: 22px; border: 1px solid #b6c4ad; background: rgba(255,255,255,.35); text-decoration: none; }
.next-page:hover { border-color: var(--acid-deep); background: #f8faef; box-shadow: 6px 6px 0 #dce2d4; transform: translate(-2px,-2px); }
.next-page small { display: block; color: var(--muted); font-size: 9px; letter-spacing: .12em; text-transform: uppercase; }
.next-page b { display: block; margin-top: 6px; font: 24px/1 var(--serif); }
.next-page span { color: var(--acid-deep); font-size: 30px; }
.page-rail { position: sticky; top: 28px; align-self: start; padding-top: 4px; }
.page-rail-label { display: block; padding-bottom: 11px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 9px; font-weight: 900; letter-spacing: .13em; text-transform: uppercase; }
.page-rail nav { display: grid; margin-top: 8px; }
.page-rail nav a { padding: 7px 9px; border-left: 2px solid transparent; color: var(--muted); text-decoration: none; font-size: 10px; line-height: 1.45; }
.page-rail nav a:hover, .page-rail nav a.active { border-left-color: var(--acid-deep); color: var(--ink); }
.rail-callout { margin-top: 35px; padding: 14px; border: 1px solid #b8c7a9; background: #e3e9d9; }
.rail-callout b { display: inline-block; padding: 4px 6px; background: var(--acid); font: 900 8px/1 var(--mono); }
.rail-callout p { margin: 9px 0 0; color: #61705f; font-size: 9px; line-height: 1.55; }

.search-dialog { width: min(720px, calc(100vw - 32px)); max-height: min(700px, calc(100vh - 48px)); padding: 0; border: 1px solid #526057; background: var(--paper); color: var(--ink); box-shadow: 12px 12px 0 rgba(0,0,0,.28); }
.search-dialog::backdrop { background: rgba(11,16,13,.78); backdrop-filter: blur(3px); }
.search-head { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 10px; padding: 13px; border-bottom: 2px solid var(--ink); background: var(--panel); }
.search-head > div { display: grid; grid-template-columns: auto minmax(0,1fr); align-items: center; gap: 10px; }
.search-head span { color: var(--acid-deep); font-size: 27px; }
.search-head input { width: 100%; border: 0; outline: 0; background: transparent; color: var(--ink); font: 19px/1.2 var(--serif); }
.search-head button { align-self: center; padding: 7px 9px; border: 1px solid var(--line); background: transparent; color: var(--muted); font: 8px/1 var(--mono); cursor: pointer; }
.search-results { max-height: 470px; overflow: auto; padding: 10px; }
.search-result { width: 100%; display: grid; grid-template-columns: 38px minmax(0,1fr); gap: 12px; padding: 13px; border: 0; border-left: 3px solid transparent; background: transparent; color: var(--ink); text-align: left; cursor: pointer; }
.search-result:hover, .search-result.active { border-left-color: var(--acid-deep); background: #edf1e5; }
.search-result > span { display: grid; place-items: center; width: 34px; height: 34px; background: var(--ink); color: var(--acid); font: 800 8px/1 var(--mono); }
.search-result b { display: block; font: 18px/1.1 var(--serif); }
.search-result small { display: block; margin-top: 5px; color: var(--muted); font-size: 9px; line-height: 1.4; }
.search-empty { min-height: 210px; display: grid; place-content: center; text-align: center; color: var(--muted); font-size: 12px; }
.search-empty span { display: block; color: var(--acid-deep); font: 48px/1 var(--serif); }
.search-hint { margin: 0; padding: 11px 15px; border-top: 1px solid var(--line); color: var(--muted); font-size: 8px; }
.search-hint span:nth-child(odd) { color: var(--ink); font-family: var(--mono); }
.toast { position: fixed; z-index: 80; right: 18px; bottom: 18px; padding: 11px 15px; border-left: 4px solid var(--acid); background: var(--ink); color: var(--paper); font-size: 10px; transform: translateY(120px); opacity: 0; transition: transform .2s, opacity .2s; }
.toast.show { transform: translateY(0); opacity: 1; }
.mobile-bar, .nav-scrim { display: none; }
.noscript { position: fixed; inset: auto 20px 20px calc(var(--sidebar) + 20px); z-index: 100; padding: 16px; border-left: 4px solid var(--amber); background: #fff1cf; }

@media (max-width: 1020px) {
  .article-grid { grid-template-columns: minmax(0, 760px); }
  .page-rail { display: none; }
}

@media (max-width: 760px) {
  .mobile-bar { position: sticky; top: 0; z-index: 29; height: 57px; display: flex; align-items: center; justify-content: space-between; padding: 7px 10px; background: var(--ink); color: var(--paper); border-bottom: 1px solid #354139; }
  .square-button { width: 40px; height: 40px; border: 1px solid #435148; background: transparent; color: var(--paper); cursor: pointer; }
  .mobile-brand { display: flex; align-items: center; gap: 9px; color: var(--paper); text-decoration: none; font-size: 11px; letter-spacing: .09em; }
  .mobile-brand b { width: 34px; height: 34px; box-shadow: none; font-size: 10px; }
  .docs-shell { display: block; }
  .sidebar { position: fixed; z-index: 32; left: 0; top: 0; width: min(88vw, 320px); transform: translateX(-110%); transition: transform .22s ease; box-shadow: 12px 0 0 rgba(0,0,0,.2); }
  body.nav-open { overflow: hidden; }
  body.nav-open .sidebar { transform: translateX(0); }
  .nav-scrim { position: fixed; z-index: 31; inset: 0; border: 0; background: rgba(6,10,7,.6); }
  body.nav-open .nav-scrim { display: block; }
  .utility-bar { min-height: 49px; padding: 0 18px; }
  .utility-links span { display: none; }
  .article-grid { padding: 45px 20px 75px; }
  .doc-article > h1 { font-size: clamp(43px, 14vw, 66px); }
  .doc-article > .lead { margin-bottom: 42px; }
  .article-body h2 { font-size: 27px; }
  .comparison-table { display: block; overflow-x: auto; }
  .noscript { left: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .001ms !important; animation-duration: .001ms !important; }
}

@media print {
  .grain, .sidebar, .mobile-bar, .utility-bar, .page-rail, .copy-button, .next-page { display: none !important; }
  .docs-shell { display: block; }
  .main-canvas { background: #fff; }
  .article-grid { display: block; padding: 0; }
  .doc-article > h1 { font-size: 46px; }
  .code-block { break-inside: avoid; }
}