:root {
  color-scheme: light;
  --bg: #f7fafb;
  --surface: #ffffff;
  --surface-soft: #f1f6f6;
  --surface-muted: #edf2f3;
  --ink: #172231;
  --ink-soft: #405064;
  --muted: #718096;
  --line: #dfe7e9;
  --line-strong: #cbd8db;
  --accent: #0ea99c;
  --accent-strong: #087f78;
  --accent-soft: #dff5f1;
  --blue: #3478ee;
  --violet: #9750e8;
  --warning: #9a6714;
  --warning-bg: #fff7dc;
  --danger: #b94848;
  --danger-bg: #fff0f0;
  --info: #286da8;
  --info-bg: #edf7ff;
  --code-bg: #182536;
  --code-ink: #e8f2f4;
  --sidebar-width: 244px;
  --radius: 12px;
  --shadow: 0 4px 8px rgba(21, 45, 56, 0.06);
}

html[data-theme='dark'] {
  color-scheme: dark;
  --bg: #10171d;
  --surface: #172129;
  --surface-soft: #1c2a31;
  --surface-muted: #233139;
  --ink: #edf5f5;
  --ink-soft: #c6d6d8;
  --muted: #91a6a9;
  --line: #2c3d44;
  --line-strong: #3a5057;
  --accent: #28c7b4;
  --accent-strong: #83eadb;
  --accent-soft: #133c3b;
  --blue: #73a5ff;
  --violet: #c293ff;
  --warning: #f1c86a;
  --warning-bg: #3b301a;
  --danger: #ff9696;
  --danger-bg: #3b2023;
  --info: #83c7ff;
  --info-bg: #183246;
  --code-bg: #0d151d;
  --code-ink: #e7f8f5;
  --shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.75 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

a { color: var(--accent-strong); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent); }

button { font: inherit; }

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 20;
  display: flex;
  width: var(--sidebar-width);
  flex-direction: column;
  overflow-y: auto;
  border-right: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  padding: 26px 16px 18px;
  backdrop-filter: blur(12px);
}

.brand-block { padding: 0 12px 20px; border-bottom: 1px solid var(--line); }
.brand-name { display: block; color: var(--ink); font-size: 1.1rem; font-weight: 750; text-decoration: none; letter-spacing: 0; }
.brand-block span { display: block; color: var(--muted); font-size: 0.78rem; line-height: 1.45; }
.back-link { display: flex; align-items: center; gap: 8px; margin: 16px 0 20px; padding: 8px 12px; border-radius: 8px; color: var(--ink-soft); font-size: 0.86rem; font-weight: 600; text-decoration: none; }
.back-link:hover { background: var(--surface-muted); color: var(--ink); }
.back-link span { font-size: 1.1rem; line-height: 1; }
.sidebar-label { padding: 0 12px 8px; color: var(--muted); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }
.toc { display: grid; gap: 3px; }
.toc a { display: block; padding: 8px 12px; border-radius: 8px; color: var(--ink-soft); font-size: 0.86rem; line-height: 1.45; text-decoration: none; transition: background .18s ease, color .18s ease; }
.toc a:hover { background: var(--surface-muted); color: var(--ink); }
.toc a.is-active { background: var(--ink); color: var(--surface); font-weight: 650; }
.sidebar-footer { display: flex; align-items: center; gap: 8px; margin-top: auto; padding: 18px 12px 0; color: var(--muted); font-size: 0.75rem; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }

.content { width: min(900px, calc(100% - var(--sidebar-width))); margin-left: var(--sidebar-width); padding: 56px 46px 88px; }
.page-header { margin-bottom: 34px; }
.eyebrow { color: var(--accent-strong); font-size: 0.7rem; font-weight: 750; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.eyebrow-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 8px; font-size: 2.55rem; line-height: 1.15; letter-spacing: 0; text-wrap: balance; }
.lead { max-width: 62ch; margin-bottom: 18px; color: var(--ink-soft); font-size: 1rem; }
.header-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.site-badge, .theme-button { display: inline-flex; align-items: center; gap: 8px; min-height: 38px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); padding: 7px 14px; color: var(--ink-soft); font-size: 0.84rem; font-weight: 650; text-decoration: none; }
.site-badge:hover, .theme-button:hover { border-color: var(--line-strong); background: var(--surface-soft); color: var(--ink); }
.badge-mark { color: var(--accent); font-size: 1rem; }
.theme-button { cursor: pointer; }
.theme-icon { color: var(--accent); font-size: 1.1rem; line-height: 1; }

.guide-topic { --muted: #56697a; --accent-strong: #076f69; }
html[data-theme='dark'] .guide-topic { --muted: #a6b9c1; --accent-strong: #83eadb; }
.guide-topic h1 { word-break: keep-all; overflow-wrap: anywhere; }
.guide-topic .breadcrumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 22px; color: var(--muted); font-size: 0.82rem; }
.guide-topic .breadcrumbs a { color: var(--ink-soft); text-decoration: none; }
.guide-topic .breadcrumbs a:hover { color: var(--accent-strong); text-decoration: underline; }
.guide-topic .guide-index-link { display: flex; align-items: center; justify-content: space-between; margin: 0 12px 24px; color: var(--accent-strong); font-size: 0.86rem; font-weight: 650; text-decoration: none; }
.guide-topic .topic-label { margin-top: 28px; }
.guide-topic .topic-nav a[aria-current='page'] { background: var(--accent-soft); color: var(--accent-strong); font-weight: 650; }
.guide-topic pre { padding-top: 44px; }
.guide-topic :focus-visible { outline: 2px solid var(--accent-strong); outline-offset: 3px; }
.guide-topic main:focus { outline: none; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 40; transform: translateY(-150%); border: 1px solid var(--accent-strong); border-radius: 8px; background: var(--surface); padding: 8px 14px; color: var(--ink); }
.skip-link:focus { transform: translateY(0); }

.doc-section { scroll-margin-top: 24px; border-bottom: 1px solid var(--line); padding: 30px 0 38px; }
.section-title { display: flex; align-items: center; gap: 13px; margin-bottom: 20px; padding-bottom: 17px; border-bottom: 1px solid var(--line); }
.section-number { display: grid; width: 32px; height: 32px; flex: 0 0 32px; place-items: center; border-radius: 50%; background: var(--ink); color: var(--surface); font-size: 0.84rem; font-weight: 750; }
.section-title h2 { margin: 2px 0 0; font-size: 1.4rem; line-height: 1.3; text-wrap: balance; }
.doc-section > p, .details-body > p { color: var(--ink-soft); }
h3 { margin: 25px 0 8px; font-size: 1.05rem; line-height: 1.4; }
.muted-note { color: var(--muted) !important; font-size: 0.88rem; }

code { border: 1px solid var(--line); border-radius: 5px; background: var(--surface-soft); padding: 2px 6px; color: var(--ink); font: 0.9em/1.4 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; }
.code-block { position: relative; margin: 10px 0 16px; }
pre { overflow-x: auto; margin: 0; border: 1px solid #26384b; border-radius: 9px; background: var(--code-bg); padding: 15px 17px; color: var(--code-ink); font: 0.86rem/1.7 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; tab-size: 2; }
pre code { border: 0; border-radius: 0; background: transparent; padding: 0; color: inherit; font: inherit; }
.copy-button { position: absolute; top: 8px; right: 8px; z-index: 1; border: 1px solid rgba(255,255,255,.2); border-radius: 6px; background: rgba(255,255,255,.1); padding: 4px 9px; color: #d3e6e9; cursor: pointer; font-size: 0.74rem; }
.copy-button:hover { background: rgba(255,255,255,.2); }
.copy-button.is-copied { color: #8ff0c9; }
.copy-button.copy-failed { color: #ffb3b3; }

.step-list, .check-list { display: grid; gap: 10px; margin: 12px 0 18px; padding: 0; list-style: none; }
.step-list li { display: flex; align-items: flex-start; gap: 11px; color: var(--ink-soft); }
.step-list li > span { display: grid; width: 23px; height: 23px; flex: 0 0 23px; place-items: center; border-radius: 50%; background: var(--accent-soft); color: var(--accent-strong); font-size: 0.76rem; font-weight: 750; }
.check-list li { position: relative; padding-left: 20px; color: var(--ink-soft); }
.check-list li::before { position: absolute; left: 0; color: var(--accent); content: "✓"; font-weight: 750; }
.route-links { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 18px; }
.route-links a { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); border-radius: 7px; background: var(--surface-soft); padding: 7px 10px; color: var(--ink-soft); font-size: 0.8rem; font-weight: 650; text-decoration: none; }
.route-links a:hover { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-strong); }
.route-links a span { color: var(--accent); font-size: 0.95rem; }
.download-rows { margin: 14px 0 18px; }
.download-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 8px 0; }
.download-platform { flex: 0 0 58px; color: var(--ink); font-size: 0.82rem; font-weight: 750; }
.download-row a { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); border-radius: 7px; background: var(--surface-soft); padding: 7px 10px; color: var(--ink-soft); font-size: 0.8rem; font-weight: 650; text-decoration: none; }
.download-row a:hover { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-strong); }
.download-row a span { color: var(--accent); font-size: 0.95rem; }

.video-links { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 22px; }
.video-links a { display: inline-flex; align-items: center; gap: 7px; border: 1px solid var(--line); border-radius: 7px; background: var(--surface); padding: 8px 11px; color: var(--ink-soft); font-size: 0.82rem; font-weight: 650; text-decoration: none; }
.video-links a:hover { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-strong); }
.video-links span { color: var(--accent); font-size: 0.72rem; }

.callout { display: flex; align-items: flex-start; gap: 11px; margin: 16px 0; border: 1px solid var(--line); border-radius: 9px; padding: 12px 14px; }
.callout p { margin: 0; color: var(--ink-soft); font-size: 0.9rem; line-height: 1.65; }
.callout strong { color: var(--ink); }
.callout-icon { display: grid; width: 21px; height: 21px; flex: 0 0 21px; place-items: center; border-radius: 50%; font-size: 0.74rem; font-weight: 800; }
.callout.info { border-color: color-mix(in srgb, var(--info) 28%, var(--line)); background: var(--info-bg); }
.callout.info .callout-icon { background: var(--info); color: #fff; }
.callout.warning { border-color: color-mix(in srgb, var(--warning) 28%, var(--line)); background: var(--warning-bg); }
.callout.warning .callout-icon { background: var(--warning); color: #fff; }
.callout.danger { border-color: color-mix(in srgb, var(--danger) 30%, var(--line)); background: var(--danger-bg); }
.callout.danger .callout-icon { background: var(--danger); color: #fff; }
.compact-callout { margin: 0; }

.screenshot { margin: 18px 0 22px; overflow: hidden; border: 1px solid var(--line); border-radius: 9px; background: var(--surface-soft); }
.screenshot img { display: block; width: 100%; height: auto; }
.screenshot figcaption { border-top: 1px solid var(--line); padding: 9px 13px; color: var(--muted); font-size: 0.78rem; }
.screenshot-home { max-width: 800px; }
.screenshot-small { max-width: 620px; }
.usage-shot { max-width: 760px; }
.screenshot-dialog { max-width: 440px; }
.screenshot-wide { max-width: 100%; }

.table-wrap { overflow-x: auto; margin: 12px 0 16px; border: 1px solid var(--line); border-radius: 9px; }
table { width: 100%; border-collapse: collapse; min-width: 560px; font-size: 0.87rem; }
th, td { border-bottom: 1px solid var(--line); padding: 11px 13px; text-align: left; vertical-align: top; }
th { background: var(--surface-soft); color: var(--ink); font-size: 0.8rem; font-weight: 750; }
td { color: var(--ink-soft); }
tbody tr:last-child td { border-bottom: 0; }
td:first-child { color: var(--ink); font-weight: 650; }

.tab-bar { display: flex; gap: 4px; margin: 3px 0 18px; border-bottom: 1px solid var(--line); }
.tab-button { margin-bottom: -1px; border: 1px solid transparent; border-bottom: 2px solid transparent; background: transparent; padding: 8px 12px; color: var(--muted); cursor: pointer; font-size: 0.85rem; font-weight: 650; }
.tab-button:hover { color: var(--ink); }
.tab-button.is-active { border-bottom-color: var(--accent); color: var(--accent-strong); }
.tab-panel[hidden] { display: none; }
.endpoint-box { display: grid; gap: 0; margin: 12px 0 16px; overflow: hidden; border: 1px solid var(--line); border-radius: 9px; }
.endpoint-box > div { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 14px; border-bottom: 1px solid var(--line); padding: 12px 14px; }
.endpoint-box > div:last-child { border-bottom: 0; }
.endpoint-box span { color: var(--muted); font-size: 0.83rem; }
.endpoint-box code { overflow-wrap: anywhere; }

details { border-top: 1px solid var(--line); }
details:last-of-type { border-bottom: 1px solid var(--line); }
summary { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 15px 2px; color: var(--ink); cursor: pointer; font-weight: 650; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { color: var(--muted); content: "+"; font-size: 1.15rem; font-weight: 400; }
details[open] summary::after { content: "−"; }
.details-body { padding: 0 2px 17px; }
.details-body p { margin-bottom: 10px; }
.details-body .code-block { margin-bottom: 13px; }

.support-box { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-top: 24px; border: 1px solid var(--accent); border-radius: 9px; background: var(--accent-soft); padding: 15px 16px; }
.support-box > div { display: flex; align-items: flex-start; gap: 10px; }
.support-box strong { display: block; font-size: 0.9rem; }
.support-box p { margin: 2px 0 0; color: var(--ink-soft); font-size: 0.8rem; line-height: 1.5; }
.support-icon { display: grid; width: 24px; height: 24px; flex: 0 0 24px; place-items: center; border-radius: 50%; background: var(--accent); color: #fff; font-weight: 800; }
.support-link { flex: 0 0 auto; font-size: 0.82rem; font-weight: 700; text-decoration: none; }
.doc-footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; padding: 8px 2px; color: var(--muted); font-size: 0.76rem; }

.menu-toggle, .nav-overlay { display: none; }

@media (max-width: 900px) {
  :root { --sidebar-width: 250px; }
  .sidebar { transform: translateX(-100%); transition: transform .22s ease; box-shadow: var(--shadow); }
  .sidebar.is-open { transform: translateX(0); }
  .nav-overlay { position: fixed; inset: 0; z-index: 15; display: block; background: rgba(11, 24, 30, .45); opacity: 0; pointer-events: none; transition: opacity .22s ease; }
  .nav-overlay.is-visible { opacity: 1; pointer-events: auto; }
  .menu-toggle { position: fixed; top: 14px; left: 14px; z-index: 30; display: grid; width: 40px; height: 40px; place-content: center; gap: 4px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); box-shadow: var(--shadow); cursor: pointer; }
  .menu-toggle span { display: block; width: 17px; height: 2px; background: var(--ink); }
  .content { width: 100%; margin-left: 0; padding: 72px 28px 70px; }
}

@media (max-width: 620px) {
  .content { padding: 66px 14px 54px; }
  .page-header { margin-bottom: 24px; }
  h1 { font-size: 2rem; }
  .lead { font-size: 0.94rem; }
  .doc-section { padding: 25px 0 30px; }
  .section-title h2 { font-size: 1.2rem; }
  .endpoint-box > div { grid-template-columns: 1fr; gap: 3px; }
  .support-box { align-items: flex-start; flex-direction: column; }
  .support-link { padding-left: 34px; }
  .screenshot-small, .usage-shot { max-width: none; }
  .doc-footer { display: grid; gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}