:root {
  color-scheme: dark;
  --bg: #1b1b1f;
  --bg-soft: #202127;
  --panel: #24252b;
  --panel-hover: #292a31;
  --text: #dfdfd6;
  --text-strong: #f1f1f1;
  --muted: #98989f;
  --line: #313136;
  --brand: #5ccfe6;
  --brand-2: #a78bfa;
  --code: #161618;
  --header: rgba(27, 27, 31, .92);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

:root.light {
  color-scheme: light;
  --bg: #fff;
  --bg-soft: #f6f6f7;
  --panel: #f6f6f7;
  --panel-hover: #eeeeef;
  --text: #3c3c43;
  --text-strong: #213547;
  --muted: #67676c;
  --line: #e2e2e3;
  --code: #292d3e;
  --header: rgba(255, 255, 255, .92);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body { margin: 0; background: var(--bg); color: var(--text); }
a { color: inherit; text-decoration: none; }
code { font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace; }

.topbar { position: fixed; inset: 0 0 auto; z-index: 40; height: 64px; border-bottom: 1px solid var(--line); background: var(--header); backdrop-filter: blur(12px); }
.topinner { display: flex; align-items: center; gap: 22px; width: 100%; height: 100%; padding: 0 28px; }
.logo { display: flex; align-items: center; gap: 10px; min-width: 190px; color: var(--text-strong); font-weight: 700; }
.logo img { width: 34px; height: 34px; border-radius: 9px; }
.logo i { color: var(--brand); font-style: normal; }
.search-trigger { display: flex; align-items: center; gap: 10px; width: 190px; padding: 8px 11px; border: 1px solid transparent; border-radius: 9px; background: var(--bg-soft); color: var(--muted); cursor: pointer; }
.search-trigger:hover { border-color: var(--line); }
.search-trigger kbd { margin-left: auto; padding: 1px 5px; border: 1px solid var(--line); border-radius: 4px; color: var(--muted); font-size: 11px; }
.topnav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.topnav a, .icon-btn { padding: 8px 10px; border: 0; border-radius: 8px; background: transparent; color: var(--text); font-size: 14px; cursor: pointer; }
.topnav a:hover, .topnav a.active, .icon-btn:hover { color: var(--brand); background: var(--bg-soft); }
.menu-btn { display: none; }

.home-main { padding-top: 64px; }
.home-hero { display: grid; min-height: 610px; place-items: center; padding: 76px 24px; text-align: center; }
.home-hero-inner { max-width: 980px; }
.brand-gradient { margin: 0; background: linear-gradient(100deg, var(--brand), var(--brand-2)); background-clip: text; color: transparent; font-size: clamp(58px, 8vw, 92px); font-weight: 800; letter-spacing: -.055em; line-height: 1; }
.home-title { margin: 18px 0 22px; color: var(--text-strong); font-size: clamp(40px, 5.8vw, 70px); line-height: 1.12; letter-spacing: -.045em; }
.home-lead { max-width: 840px; margin: auto; color: var(--muted); font-size: clamp(17px, 2vw, 22px); line-height: 1.7; }
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: center; padding: 11px 21px; border-radius: 22px; background: var(--panel); color: var(--text-strong); font-size: 14px; font-weight: 650; }
.button.primary { background: var(--brand); color: #112026; }
.button:hover { transform: translateY(-1px); filter: brightness(1.08); }
.home-section { max-width: 1120px; margin: auto; padding: 56px 28px; }
.section-heading { margin-bottom: 28px; text-align: center; }
.section-heading h2 { margin: 0 0 12px; color: var(--text-strong); font-size: 32px; }
.section-heading p { margin: 0; color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature { min-height: 164px; padding: 24px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
.feature:hover { background: var(--panel-hover); }
.feature-icon { display: grid; width: 42px; height: 42px; place-items: center; margin-bottom: 16px; border-radius: 10px; background: var(--bg); font-size: 21px; }
.feature h3 { margin: 0 0 8px; color: var(--text-strong); font-size: 17px; }
.feature p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.75; }

.sidebar { position: fixed; inset: 64px auto 0 0; z-index: 20; width: 272px; padding: 26px 18px 40px; overflow-y: auto; border-right: 1px solid var(--line); background: var(--bg); }
.side-group { margin: 8px 0 24px; }
.side-title { margin: 0 10px 9px; color: var(--text-strong); font-size: 14px; font-weight: 700; }
.side-link { display: block; margin: 2px 0; padding: 7px 11px; border-radius: 7px; color: var(--muted); font-size: 13px; }
.side-link:hover, .side-link.active { color: var(--brand); background: color-mix(in srgb, var(--brand) 9%, transparent); }
.doc-main { padding: 64px 0 0 272px; }
.doc-shell { display: grid; grid-template-columns: minmax(0, 760px) 210px; gap: 56px; max-width: 1070px; margin: auto; padding: 46px 28px 80px; }
.article { min-width: 0; }
.breadcrumbs { margin-bottom: 26px; color: var(--muted); font-size: 13px; }
.breadcrumbs span { padding: 0 7px; }
.article h1 { margin: 0; color: var(--text-strong); font-size: 34px; letter-spacing: -.025em; }
.page-meta { margin: 14px 0 30px; padding-bottom: 22px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.article h2 { margin: 42px 0 16px; padding-top: 5px; color: var(--text-strong); font-size: 25px; letter-spacing: -.015em; }
.article h3 { margin: 28px 0 12px; color: var(--text-strong); font-size: 18px; }
.article p, .article li { color: var(--text); font-size: 15px; line-height: 1.9; }
.article ol, .article ul { padding-left: 23px; }
.article a:not(.button) { color: var(--brand); }
.article code:not(pre code) { padding: 2px 6px; border-radius: 5px; background: var(--bg-soft); color: var(--brand); font-size: 13px; }
.lead-box { margin: 22px 0 32px; padding: 16px 18px; border-left: 3px solid var(--brand); background: var(--bg-soft); color: var(--text); line-height: 1.8; }
.callout { margin: 22px 0; padding: 16px 18px; border-left: 4px solid var(--brand); border-radius: 7px; background: color-mix(in srgb, var(--brand) 9%, var(--bg)); color: var(--text); font-size: 14px; line-height: 1.8; }
.callout.warn { border-color: #eab308; background: color-mix(in srgb, #eab308 9%, var(--bg)); }
.callout.danger { border-color: #ef4444; background: color-mix(in srgb, #ef4444 9%, var(--bg)); }
.callout strong { display: block; margin-bottom: 3px; color: var(--text-strong); }
.code { position: relative; margin: 20px 0; border-radius: 8px; background: var(--code); overflow: hidden; }
.code pre { margin: 0; padding: 20px 72px 20px 20px; overflow-x: auto; color: #d7dae0; font-size: 13px; line-height: 1.75; }
.copy { position: absolute; top: 9px; right: 9px; padding: 5px 8px; border: 1px solid #ffffff17; border-radius: 6px; background: #ffffff0a; color: #a8abb2; cursor: pointer; }
.table-wrap { margin: 20px 0; overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; }
table { width: 100%; min-width: 590px; border-collapse: collapse; font-size: 14px; }
th, td { padding: 12px 15px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-align: left; }
th:last-child, td:last-child { border-right: 0; }
tr:last-child td { border-bottom: 0; }
th { background: var(--bg-soft); color: var(--text-strong); }
td { color: var(--text); }
.toc { position: sticky; top: 92px; align-self: start; padding-left: 17px; border-left: 1px solid var(--line); }
.toc-title { margin: 0 0 11px; color: var(--text-strong); font-size: 13px; font-weight: 700; }
.toc a { display: block; padding: 5px 0; color: var(--muted); font-size: 12px; line-height: 1.45; }
.toc a:hover { color: var(--brand); }
.toc .sub { padding-left: 12px; }
.page-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--line); }
.page-nav a { padding: 14px 16px; border: 1px solid var(--line); border-radius: 9px; color: var(--muted); font-size: 12px; }
.page-nav a:last-child { text-align: right; }
.page-nav strong { display: block; margin-top: 3px; color: var(--brand); font-size: 14px; }
.footer { padding: 34px; border-top: 1px solid var(--line); text-align: center; color: var(--muted); font-size: 12px; }

.overlay, .mobile-side { display: none; }
.search-modal { display: none; position: fixed; inset: 0; z-index: 100; padding: 90px 18px 18px; background: #0009; backdrop-filter: blur(5px); }
.search-modal.open { display: block; }
.search-box { max-width: 640px; margin: auto; padding: 14px; border: 1px solid var(--line); border-radius: 13px; background: var(--bg); box-shadow: 0 24px 80px #0008; }
.search-box input { width: 100%; padding: 13px 14px; border: 1px solid var(--line); border-radius: 8px; outline: 0; background: var(--bg-soft); color: var(--text); font-size: 15px; }
.search-results { max-height: 390px; margin-top: 10px; overflow-y: auto; }
.search-results a { display: block; padding: 11px 12px; border-radius: 7px; color: var(--text); font-size: 14px; }
.search-results a:hover { background: var(--bg-soft); color: var(--brand); }

@media (max-width: 1100px) {
  .doc-shell { grid-template-columns: minmax(0, 760px); max-width: 820px; }
  .toc { display: none; }
  .topnav a:nth-last-of-type(n+5) { display: none; }
}

@media (max-width: 820px) {
  .topinner { padding: 0 14px; gap: 10px; }
  .logo { min-width: 0; }
  .search-trigger { width: auto; margin-left: auto; padding: 8px; }
  .search-trigger span, .search-trigger kbd { display: none; }
  .topnav { margin-left: 0; }
  .topnav a { display: none !important; }
  .menu-btn { display: inline-flex; }
  .sidebar { display: none; }
  .doc-main { padding-left: 0; }
  .doc-shell { padding: 34px 20px 64px; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .overlay.open { display: block; position: fixed; inset: 0; z-index: 60; background: #0009; }
  .mobile-side.open { display: block; position: fixed; inset: 0 auto 0 0; z-index: 61; width: min(310px, 86vw); padding: 20px 16px; overflow-y: auto; border-right: 1px solid var(--line); background: var(--bg); }
  .mobile-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; color: var(--text-strong); font-weight: 700; }
  .mobile-group { margin-bottom: 20px; }
  .mobile-group-title { margin: 0 0 7px; padding: 0 12px; color: var(--text-strong); font-size: 15px; font-weight: 700; }
  .mobile-group .side-link { display: block; margin: 2px 0; }
}

@media (max-width: 560px) {
  .home-hero { min-height: 550px; padding: 58px 20px; }
  .home-title { font-size: 39px; }
  .brand-gradient { font-size: 56px; }
  .home-section { padding: 42px 18px; }
  .feature-grid { grid-template-columns: 1fr; }
  .article h1 { font-size: 30px; }
  .article h2 { font-size: 23px; }
  .article p, .article li { font-size: 14px; line-height: 1.8; }
  .code pre { padding: 16px 14px; font-size: 12px; }
  .copy { position: static; display: block; margin: 8px 8px 0 auto; }
  table { min-width: 520px; font-size: 13px; }
  th, td { padding: 9px 11px; }
  .page-nav { grid-template-columns: 1fr; }
  .page-nav a:last-child { text-align: left; }
}