:root {
  color-scheme: light;
  --bg: #eef2f7;
  --ink: #18202f;
  --muted: #596779;
  --line: #d6dce8;
  --blue: #1463ff;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 28px; }
body { margin: 0; color: var(--ink); background: var(--bg); font: 15px/1.8 "Microsoft YaHei", "Segoe UI", Arial, sans-serif; }
a { color: #1254d5; text-underline-offset: 4px; }
a:hover { text-decoration: underline; }
a:focus-visible, summary:focus-visible, [tabindex]:focus-visible { outline: 3px solid #1463ff; outline-offset: 5px; border-radius: 3px; }
p { margin: 0 0 14px; }
h1, h2, h3 { line-height: 1.4; }
h2 { margin: 6px 0 12px; font-size: 27px; letter-spacing: -0.5px; }
h3 { margin: 8px 0; font-size: 18px; }
section[id], header[id] { scroll-margin-top: 24px; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 10; padding: 8px 16px; transform: translateY(-160%); background: #fff; }
.skip-link:focus { transform: translateY(0); }
.guide-sidebar { position: fixed; inset: 0 auto 0 0; width: 248px; padding: 30px 24px 22px; display: flex; flex-direction: column; overflow-y: auto; background: #121827; color: #fff; }
.brand { display: flex; gap: 12px; align-items: center; color: #fff; text-decoration: none; }
.brand-mark { flex: 0 0 42px; height: 42px; display: grid; place-items: center; border-radius: 6px; background: var(--blue); font-weight: 900; }
.brand strong { display: block; font-size: 16px; }
.brand small { display: block; color: #aab4c7; font-size: 11px; }
.guide-sidebar nav { margin: 22px 0; }
.nav-label { margin: 20px 10px 7px; color: #99a9c0; font-size: 11px; letter-spacing: 1px; }
.guide-sidebar nav a { display: block; margin: 3px 0; padding: 7px 10px; border-radius: 5px; color: #e1e7f1; text-decoration: none; font-size: 13px; }
.guide-sidebar nav a:hover, .guide-sidebar nav a:focus-visible { background: #243147; color: #fff; }
.guide-sidebar nav a span { display: inline-block; width: 23px; color: #91ace0; font-size: 11px; }
.sidebar-footer { margin-top: auto; }
.sidebar-footer .button { display: flex; justify-content: space-between; color: #fff; background: #26334a; }
.sidebar-footer p { margin: 14px 0 0; color: #aab4c7; font-size: 11px; line-height: 1.8; }
main { max-width: 1320px; margin-left: 248px; padding: 52px clamp(24px, 4.5vw, 72px) 20px; }
.hero { padding: 6px 0 38px; border-bottom: 1px solid var(--line); }
.eyebrow { margin: 0; color: #2655a1; font-size: 11px; letter-spacing: 1.4px; font-weight: 800; }
h1 { margin: 24px 0 22px; font-size: clamp(28px, 3.4vw, 43px); letter-spacing: -1.2px; }
h1 span { display: block; margin-top: 6px; color: #4d6381; font-size: 0.64em; letter-spacing: 0; font-weight: 500; }
.hero > p:not(.eyebrow) { max-width: 760px; color: var(--muted); }
.hero .lead { margin-bottom: 8px; color: var(--ink) !important; font-size: 19px; font-weight: 700; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 24px; margin-top: 24px; }
.button { display: inline-flex; align-items: center; gap: 28px; min-height: 42px; padding: 9px 18px; border-radius: 6px; text-decoration: none; font-size: 13px; font-weight: 700; }
.button.primary { background: var(--blue); color: #fff; }
.button:hover { filter: brightness(0.95); text-decoration: none; }
.text-link { font-size: 13px; font-weight: 700; }
.section { padding: 40px 0; border-bottom: 1px solid var(--line); }
.section-heading { margin-bottom: 22px; }
.section-heading > p:last-child:not(.eyebrow) { margin: 0; color: var(--muted); }
.module-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.module-card { display: block; padding: 23px 26px; color: var(--ink); background: #fff; border: 1px solid var(--line); border-radius: 8px; text-decoration: none; }
.module-card:hover { border-color: #7398dc; text-decoration: none; box-shadow: 0 4px 16px #18202f08; }
.module-card p { color: var(--muted); font-size: 13px; line-height: 1.85; }
.module-number, .card-link { color: #2655a1; font-size: 11px; font-weight: 700; }
.module-number { letter-spacing: 1px; }
.section-note { margin: 18px 0 0; color: var(--muted); font-size: 13px; }
.steps { margin: 0; padding-left: 25px; }
.steps li { padding: 5px 0 10px 9px; }
.steps li::marker { color: #2655a1; font-weight: 800; }
.setup-steps { padding: 18px 28px 18px 48px; background: #fff; border: 1px solid var(--line); border-radius: 8px; }
.workflow-list { margin: 24px 0; }
.workflow-list > div { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 18px; padding: 15px 0; border-bottom: 1px dashed var(--line); }
.workflow-list strong { font-size: 13px; }
.workflow-list p { margin: 0; color: var(--muted); font-size: 13px; }
.io-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin: 0 0 22px; padding: 18px 22px; background: #fff; border: 1px solid var(--line); border-radius: 8px; }
.io-row dt { margin-bottom: 4px; color: #2655a1; font-size: 11px; font-weight: 800; }
.io-row dd { margin: 0; color: var(--muted); font-size: 13px; }
.callout { margin: 20px 0 0; padding: 14px 18px; border-left: 3px solid #759bde; background: #e4ecf9; color: #314a6e; font-size: 13px; }
.example { margin-top: 18px; padding: 18px 22px; border: 1px dashed #b6c5da; border-radius: 8px; font-size: 13px; }
.example p { margin: 6px 0 0; color: var(--muted); }
.comparison-example { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 16px; padding: 18px 22px; background: #fff; border: 1px solid var(--line); border-radius: 8px; font-size: 13px; }
.example-label { color: var(--muted); font-size: 11px; }
.before { color: #b42318; font-weight: 700; }
.after { color: #16723c; font-weight: 700; }
.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
table { width: 100%; border-collapse: collapse; text-align: left; font-size: 13px; }
th, td { padding: 16px 18px; border-bottom: 1px solid var(--line); vertical-align: top; }
thead { background: #e4eaf3; }
th:first-child { width: 22%; }
th:nth-child(2) { width: 30%; }
tbody th { font-weight: 700; }
td { color: var(--muted); }
tr:last-child td, tr:last-child th { border-bottom: 0; }
.reference-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-top: 22px; }
.reference-grid h3 { font-size: 15px; }
.reference-grid p { margin: 0; color: var(--muted); font-size: 13px; }
.faq-list { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { padding: 19px 0; cursor: pointer; font-weight: 700; font-size: 14px; }
summary::marker { color: #2655a1; }
details p { max-width: 850px; padding: 0 20px 7px; color: var(--muted); font-size: 13px; }
.guide-footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; padding: 24px 0; font-size: 11px; color: var(--muted); }
.guide-footer p { margin: 0; }

@media (min-width: 1570px) { main { margin-right: auto; } }
@media (max-width: 1000px) {
  .guide-sidebar { width: 220px; padding: 24px 18px; }
  main { margin-left: 220px; padding: 34px 28px 16px; }
  .workflow-list > div { grid-template-columns: 1fr; gap: 5px; }
  .module-card { padding: 20px; }
}
@media (max-width: 760px) {
  .guide-sidebar { position: static; width: 100%; padding: 20px; }
  .guide-sidebar nav { display: flex; flex-wrap: wrap; gap: 5px; margin: 20px 0 0; }
  .guide-sidebar nav a { margin: 0; padding: 6px 9px; border: 1px solid #344154; font-size: 12px; }
  .guide-sidebar nav a span, .nav-label, .sidebar-footer { display: none; }
  main { margin: 0; padding: 28px 20px 10px; }
  h1 { font-size: 29px; letter-spacing: -0.7px; }
  h2 { font-size: 23px; }
  .hero .lead { font-size: 16px; }
  .hero-actions { gap: 20px; }
  .section { padding: 32px 0; }
  .module-grid, .io-row, .reference-grid { grid-template-columns: 1fr; }
  .module-card { padding: 20px 22px; }
  .io-row { gap: 13px; }
  .reference-grid { gap: 14px; }
  table { min-width: 560px; }
  .steps li { padding-left: 3px; }
  .setup-steps { padding-left: 38px; padding-right: 18px; }
  .guide-footer { font-size: 12px; }
}
@media print {
  @page { margin: 16mm; }
  body { background: #fff; font-size: 10pt; }
  .guide-sidebar, .skip-link, .hero-actions, .guide-footer > a { display: none; }
  main { max-width: none; margin: 0; padding: 0; }
  h1 { font-size: 25pt; }
  h2 { font-size: 18pt; }
  .hero { padding: 0 0 20px; }
  .section { padding: 22px 0; }
  .section-heading, h3, summary { break-after: avoid; }
  .module-card, .io-row, .example, .callout, tr, details { break-inside: avoid; }
  .module-grid, .io-row, .reference-grid { grid-template-columns: 1fr 1fr; }
  .table-scroll { overflow: visible; }
  table { min-width: 0; }
  a { color: inherit; text-decoration: none; }
  details::details-content { content-visibility: visible; }
  details > p { display: block !important; }
  summary { list-style: none; padding-bottom: 8px; }
}