:root {
  color-scheme: light;
  --paper: #f3f5f7;
  --surface: #ffffff;
  --ink: #111820;
  --muted: #5f6c78;
  --line: #dce2e8;
  --signal: #d83b36;
  --signal-dark: #a72220;
  --signal-soft: #fff0ef;
  --blue: #1769aa;
  --code: #17212b;
  --code-ink: #e7edf2;
  --radius: 14px;
  font-family: "HarmonyOS Sans SC", "MiSans", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; min-width: 320px; color: var(--ink); background: var(--paper); line-height: 1.7; }
a { color: inherit; }
button { font: inherit; }
code, pre { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; }
code { overflow-wrap: anywhere; }

.skip-link { position: fixed; left: 16px; top: 12px; z-index: 99; transform: translateY(-180%); padding: 8px 12px; background: var(--ink); color: #fff; border-radius: 8px; }
.skip-link:focus { transform: translateY(0); }

.topbar { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between; height: 64px; padding: 0 clamp(18px, 4vw, 52px); border-bottom: 1px solid rgba(17, 24, 32, .1); background: rgba(243, 245, 247, .92); backdrop-filter: blur(14px); }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 760; letter-spacing: -.02em; }
.brand-mark { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 8px; background: var(--signal); color: #fff; font: 800 12px/1 "SFMono-Regular", Consolas, monospace; }
.main-link { color: var(--muted); font-size: 14px; text-underline-offset: 4px; }

main { width: min(1240px, calc(100% - 36px)); margin: 0 auto; }
.hero { padding: clamp(54px, 8vw, 104px) 0 64px; }
.hero-copy { max-width: 900px; }
.eyebrow, .section-kicker { margin: 0 0 14px; color: var(--signal-dark); font: 750 12px/1.3 "SFMono-Regular", Consolas, monospace; letter-spacing: .13em; }
h1, h2 { margin: 0; line-height: 1.14; letter-spacing: -.045em; text-wrap: balance; }
h1 { font-size: clamp(40px, 7vw, 78px); font-weight: 820; }
h2 { font-size: clamp(27px, 4vw, 38px); }
.lead { max-width: 760px; margin: 24px 0 0; color: var(--muted); font-size: clamp(17px, 2vw, 20px); }

.trace { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin: 54px 0 32px; }
.trace::before { content: ""; position: absolute; left: 13px; right: 13px; top: 13px; height: 2px; background: linear-gradient(90deg, var(--signal) 0 74%, var(--line) 74%); }
.trace-stop { position: relative; display: grid; gap: 4px; padding-right: 18px; }
.trace-stop > span { z-index: 1; display: grid; place-items: center; width: 28px; height: 28px; border: 2px solid var(--signal); border-radius: 50%; background: var(--paper); color: var(--signal-dark); font: 750 10px/1 monospace; }
.trace-stop strong { margin-top: 9px; }
.trace-stop small { color: var(--muted); }

.base-url { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 18px 20px; border: 1px solid #bfc9d2; border-left: 4px solid var(--signal); border-radius: var(--radius); background: var(--surface); box-shadow: 0 14px 38px rgba(38, 54, 68, .06); }
.base-url div { min-width: 0; display: grid; gap: 3px; }
.base-url span { color: var(--muted); font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
.base-url code { font-size: clamp(14px, 2vw, 17px); font-weight: 700; }

.copy { border: 1px solid #b9c3cc; border-radius: 8px; background: #fff; color: var(--ink); padding: 6px 11px; cursor: pointer; font-weight: 700; font-size: 12px; }
.copy:hover { border-color: var(--signal); color: var(--signal-dark); }
.copy:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid rgba(216, 59, 54, .3); outline-offset: 3px; }

.docs-layout { display: grid; grid-template-columns: 210px minmax(0, 820px); justify-content: center; gap: clamp(36px, 6vw, 78px); align-items: start; padding-bottom: 100px; }
.sidebar { position: sticky; top: 92px; display: grid; gap: 2px; font-size: 13px; }
.sidebar p { margin: 18px 10px 6px; color: #89939c; font: 750 10px/1 monospace; letter-spacing: .13em; text-transform: uppercase; }
.sidebar a { display: flex; align-items: center; gap: 8px; padding: 6px 10px; border-radius: 7px; color: var(--muted); text-decoration: none; }
.sidebar a:hover { color: var(--ink); background: #e7ebef; }
.sidebar .method { min-width: 40px; padding: 3px 4px; font-size: 8px; }

.documentation { min-width: 0; }
.doc-section, .endpoint-section { padding: 52px 0; border-top: 1px solid var(--line); }
.documentation > section:first-child { border-top: 0; }
.doc-section > p:not(.section-kicker), .endpoint-section > p { color: var(--muted); }
.notice { margin-top: 22px; padding: 16px 18px; border: 1px solid #f0c3c0; border-radius: 10px; background: var(--signal-soft); color: #682522; }

.endpoint-title { display: flex; align-items: flex-start; gap: 15px; margin-bottom: 20px; }
.endpoint-title h2 { font-size: 30px; }
.endpoint-title code { color: var(--muted); font-size: 13px; }
.method { display: inline-grid; place-items: center; min-width: 58px; margin-top: 4px; padding: 5px 8px; border-radius: 6px; color: #fff; font: 800 10px/1 "SFMono-Regular", Consolas, monospace; letter-spacing: .04em; }
.method.get { background: var(--blue); }
.method.post { background: var(--signal); }

.codebox { margin-top: 24px; overflow: hidden; border-radius: 11px; background: var(--code); box-shadow: 0 14px 34px rgba(9, 17, 24, .1); }
.codebar { display: flex; align-items: center; justify-content: space-between; min-height: 42px; padding: 6px 10px 6px 16px; border-bottom: 1px solid rgba(255, 255, 255, .1); color: #98a8b6; font-size: 12px; }
.codebar .copy { border-color: #45515d; background: transparent; color: #d9e1e7; }
pre { margin: 0; padding: 20px; overflow: auto; color: var(--code-ink); font-size: 13px; line-height: 1.65; tab-size: 2; }
details { margin-top: 20px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
summary { padding: 14px 16px; cursor: pointer; font-weight: 700; }
details pre { border-radius: 0 0 9px 9px; background: var(--code); }

.fields { display: grid; grid-template-columns: max-content 1fr; gap: 10px 18px; margin-top: 18px; padding: 16px 18px; border: 1px solid var(--line); border-radius: 10px; background: #fff; font-size: 14px; }
.fields code { color: var(--signal-dark); font-weight: 750; }
.fields span { color: var(--muted); }
.billing-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 24px; }
.billing-grid div { display: grid; gap: 2px; padding: 18px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.billing-grid strong { color: var(--signal); font: 800 30px/1.2 "SFMono-Regular", Consolas, monospace; }
.billing-grid span { color: var(--muted); font-size: 13px; }
.error-table { margin-top: 24px; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: #fff; }
.error-table > div { display: grid; grid-template-columns: 70px 1fr; gap: 16px; padding: 13px 16px; border-top: 1px solid var(--line); }
.error-table > div:first-child { border-top: 0; }
.error-table strong { color: var(--signal-dark); font-family: monospace; }
.error-table span { color: var(--muted); }

footer { display: flex; justify-content: space-between; gap: 20px; padding: 24px clamp(18px, 4vw, 52px) 38px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.toast { position: fixed; left: 50%; bottom: 24px; z-index: 30; transform: translate(-50%, 20px); opacity: 0; pointer-events: none; padding: 9px 14px; border-radius: 8px; background: var(--ink); color: #fff; font-size: 13px; transition: .18s ease; }
.toast.visible { transform: translate(-50%, 0); opacity: 1; }

@media (max-width: 820px) {
  .docs-layout { grid-template-columns: minmax(0, 1fr); }
  .sidebar { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); padding: 12px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
  .sidebar p { grid-column: 1 / -1; margin-top: 10px; }
  .trace { grid-template-columns: repeat(2, 1fr); gap: 22px 0; }
  .trace::before { display: none; }
  .trace-stop { border-left: 2px solid var(--signal); padding-left: 14px; }
  .trace-stop > span { margin-left: -29px; }
}

@media (max-width: 560px) {
  main { width: min(100% - 28px, 1240px); }
  .topbar { padding-inline: 14px; }
  .main-link { font-size: 12px; }
  .hero { padding-top: 46px; }
  .trace, .billing-grid { grid-template-columns: 1fr 1fr; }
  .base-url { align-items: flex-start; }
  .docs-layout { gap: 28px; }
  .sidebar { grid-template-columns: 1fr; }
  .sidebar p { grid-column: auto; }
  .doc-section, .endpoint-section { padding: 40px 0; }
  .endpoint-title { align-items: center; }
  .fields { grid-template-columns: 1fr; gap: 4px; }
  .fields span { margin-bottom: 8px; }
  pre { padding: 16px; font-size: 12px; }
  footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}