:root {
  --ink: #111816;
  --ink-soft: #27352f;
  --paper: #f1f4f1;
  --surface: #fbfcfa;
  --line: #d7e0da;
  --line-strong: #bdccc3;
  --muted: #66746d;
  --muted-light: #8e9b94;
  --accent: #ed6547;
  --accent-dark: #c94c35;
  --mint: #29b58e;
  --yellow: #f1bd56;
  --max-width: 1180px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  min-width: 320px;
  background: var(--paper);
  color: var(--ink);
  font-family: "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
a:focus-visible { outline: 3px solid rgba(237, 101, 71, 0.42); outline-offset: 4px; }
code, pre, .eyebrow, .guide-meta, .guide-number { font-family: "SFMono-Regular", "Cascadia Code", Menlo, monospace; }
code { padding: 2px 5px; background: #e6ede8; color: var(--ink-soft); font-size: 0.88em; }

.guide-shell { width: min(100% - 48px, var(--max-width)); margin: 0 auto; }

.guide-header {
  min-height: 82px;
  display: flex;
  align-items: center;
  gap: 28px;
  border-bottom: 1px solid var(--line);
}

.guide-brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; }
.guide-mark { width: 40px; height: 40px; display: block; overflow: hidden; border: 2px solid var(--ink); border-radius: 50%; background: #fff; }
.guide-mark img { display: block; width: 100%; height: 100%; object-fit: cover; }
.guide-brand-copy { display: flex; flex-direction: column; line-height: 1.05; }
.guide-brand-copy strong { font-size: 15px; font-weight: 800; }
.guide-brand-copy small { margin-top: 5px; color: var(--muted); font-size: 9px; letter-spacing: 0.13em; }

.guide-nav { display: flex; align-items: center; gap: 23px; margin-left: auto; }
.guide-nav a { color: var(--muted); font-size: 13px; text-decoration: none; }
.guide-nav a:hover { color: var(--ink); }
.guide-nav .guide-nav-cta { color: var(--accent-dark); font-weight: 800; }

.guide-hero { padding: 76px 0 64px; border-bottom: 1px solid var(--line-strong); }
.eyebrow { color: var(--accent-dark); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; }
.guide-hero h1 { max-width: 780px; margin-top: 19px; font-size: clamp(42px, 6vw, 68px); font-weight: 800; letter-spacing: 0; line-height: 1.08; }
.guide-hero h1 em { color: var(--accent); font-style: normal; }
.guide-hero .lead { max-width: 700px; margin-top: 26px; color: var(--muted); font-size: 17px; line-height: 1.85; }
.guide-meta { display: flex; flex-wrap: wrap; gap: 11px 18px; margin-top: 27px; color: var(--muted-light); font-size: 10px; }
.guide-meta span + span::before { content: "/"; margin-right: 18px; color: var(--line-strong); }

.guide-layout { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 84px; padding: 70px 0 100px; }
.guide-article { min-width: 0; max-width: 760px; }
.guide-card-list { margin-top: 28px; border-top: 1px solid var(--line-strong); }
.guide-card { display: grid; grid-template-columns: 38px minmax(0, 1fr) 25px; align-items: center; gap: 17px; min-height: 116px; padding: 16px 0; border-bottom: 1px solid var(--line-strong); text-decoration: none; }
.guide-card:hover h3 { color: var(--accent-dark); }
.guide-number { color: var(--accent-dark); font-size: 10px; letter-spacing: 0.06em; }
.guide-card h3 { font-size: 17px; line-height: 1.4; transition: color 160ms ease; }
.guide-card p { margin-top: 6px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.guide-arrow { color: var(--accent); font-size: 20px; line-height: 1; }
.guide-article h2 { margin: 46px 0 14px; font-size: 28px; line-height: 1.25; }
.guide-article h2:first-child { margin-top: 0; }
.guide-article h3 { margin: 28px 0 8px; font-size: 18px; line-height: 1.35; }
.guide-article p { margin-top: 12px; color: var(--muted); }
.guide-article strong { color: var(--ink); }
.guide-article ul, .guide-article ol { margin: 17px 0 0 22px; color: var(--muted); }
.guide-article li { margin-top: 8px; padding-left: 4px; }

.guide-table { width: 100%; margin-top: 20px; border-top: 1px solid var(--ink); border-collapse: collapse; font-size: 13px; }
.guide-table th, .guide-table td { padding: 13px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.guide-table th { color: var(--muted-light); font-family: "SFMono-Regular", Menlo, monospace; font-size: 9px; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; }
.guide-table td { color: var(--muted); }
.guide-table td strong { color: var(--ink); }

.guide-code { margin-top: 20px; overflow-x: auto; border: 1px solid #24332d; border-radius: 5px; background: var(--ink); color: #d7e4dc; }
.guide-code .code-top { display: flex; align-items: center; gap: 6px; min-height: 31px; padding: 0 12px; border-bottom: 1px solid rgba(255, 255, 255, 0.12); color: #87968d; font-size: 9px; }
.guide-code .code-top i { width: 5px; height: 5px; display: block; border-radius: 50%; background: #53605a; }
.guide-code .code-top i:first-child { background: var(--accent); }
.guide-code .code-top i:nth-child(2) { background: var(--yellow); }
.guide-code .code-top span { margin-left: 6px; }
.guide-code pre { min-width: 520px; padding: 18px; color: #c6d5ce; font-size: 12px; line-height: 1.85; white-space: pre; }
.code-key { color: #82c9c3; }
.code-string { color: #f4bf63; }
.code-comment { color: #7c8f84; }

.guide-callout { margin-top: 24px; padding: 18px 20px; border-left: 3px solid var(--accent); background: #f8e9e4; }
.guide-callout strong { display: block; font-size: 14px; }
.guide-callout p { margin-top: 4px; color: var(--ink-soft); font-size: 13px; }
.guide-checklist { margin-top: 20px !important; margin-left: 0 !important; list-style: none; }
.guide-checklist li { display: flex; gap: 10px; margin-top: 10px; padding: 0; color: var(--muted); }
.guide-checklist li::before { content: "✓"; width: 18px; height: 18px; display: inline-grid; flex: none; place-items: center; border: 1px solid var(--mint); border-radius: 50%; color: var(--mint); font-family: sans-serif; font-size: 11px; line-height: 1; }

.guide-aside { align-self: start; position: sticky; top: 24px; padding-left: 23px; border-left: 1px solid var(--line-strong); }
.guide-aside .eyebrow { margin-bottom: 14px; }
.guide-aside ol { margin: 0; padding-left: 19px; color: var(--muted); font-size: 12px; }
.guide-aside li { margin-top: 10px; padding-left: 4px; }
.guide-aside a { text-decoration: none; }
.guide-aside a:hover { color: var(--accent-dark); }
.aside-rule { width: 42px; height: 1px; margin: 37px 0 22px; background: var(--line-strong); }
.aside-note { color: var(--muted); font-size: 12px; line-height: 1.7; }

.guide-cta { display: flex; align-items: center; justify-content: space-between; gap: 28px; margin: 0 auto 80px; padding: 34px 38px; background: var(--ink); color: #fff; }
.guide-cta h2 { color: #fff; font-size: 26px; }
.guide-cta p { max-width: 560px; margin-top: 7px; color: #b0bdb6; font-size: 13px; }
.guide-button { min-height: 45px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; flex: none; padding: 0 16px; border-radius: 4px; background: var(--accent); color: #fff; font-size: 12px; font-weight: 800; text-decoration: none; }
.guide-button:hover { background: var(--accent-dark); }

.guide-footer { display: flex; align-items: center; justify-content: space-between; gap: 18px; min-height: 95px; border-top: 1px solid var(--line-strong); color: var(--muted); font-size: 12px; }
.guide-footer a { text-decoration: none; }
.guide-footer a:hover { color: var(--ink); }
.guide-footer-links { display: flex; flex-wrap: wrap; gap: 18px; }

@media (max-width: 780px) {
  .guide-shell { width: min(100% - 32px, var(--max-width)); }
  .guide-header { min-height: 72px; }
  .guide-nav { gap: 13px; }
  .guide-nav a:not(.guide-nav-cta) { display: none; }
  .guide-hero { padding: 54px 0 48px; }
  .guide-hero h1 { font-size: 42px; }
  .guide-hero .lead { font-size: 15px; }
  .guide-layout { grid-template-columns: 1fr; gap: 46px; padding-top: 52px; }
  .guide-aside { position: static; order: -1; padding: 0 0 25px; border-right: 0; border-bottom: 1px solid var(--line-strong); }
  .guide-aside ol { display: grid; grid-template-columns: 1fr 1fr; gap: 7px 18px; }
  .guide-aside li { margin-top: 0; }
  .guide-article h2 { font-size: 25px; }
  .guide-card { grid-template-columns: 29px minmax(0, 1fr) 20px; gap: 11px; }
  .guide-card h3 { font-size: 15px; }
  .guide-card p { font-size: 12px; }
  .guide-table { font-size: 12px; }
  .guide-table th, .guide-table td { padding: 10px 8px; }
  .guide-cta { align-items: flex-start; flex-direction: column; margin-bottom: 58px; padding: 28px 22px; }
  .guide-footer { align-items: flex-start; flex-direction: column; justify-content: center; padding: 24px 0; }
}

@media (max-width: 470px) {
  .guide-brand-copy small { font-size: 8px; }
  .guide-hero h1 { font-size: 36px; }
  .guide-meta { font-size: 9px; }
  .guide-meta span + span::before { margin-right: 11px; }
  .guide-aside ol { display: block; }
  .guide-aside li { margin-top: 8px; }
  .guide-table { display: block; overflow-x: auto; white-space: nowrap; }
  .guide-code pre { font-size: 10px; }
}