.doc { width: min(760px, calc(100% - 48px)); margin: 0 auto; padding: 84px 0 40px; }
.doc-crumb { margin: 0 0 22px; color: var(--ink-3); font-size: 12px; }
.doc .doc-crumb a { color: var(--ink-3); text-decoration: none; }
.doc .doc-crumb a:hover { color: var(--brand); }
.doc h1 { margin: 0; color: var(--ink); font-size: 38px; font-weight: 700; line-height: 1.28; letter-spacing: -.5px; }
.doc-lead { margin: 20px 0 0; color: var(--ink-2); font-size: 16px; line-height: 1.8; }
.doc-meta { margin: 26px 0 0; padding: 14px 0 0; border-top: 1px solid var(--line); color: var(--ink-3); font-size: 12px; }
.doc h2 { margin: 54px 0 14px; padding-top: 30px; border-top: 1px solid var(--line); color: var(--ink); font-size: 23px; font-weight: 700; line-height: 1.35; }
.doc h3 { margin: 30px 0 8px; color: var(--ink); font-size: 16px; font-weight: 700; }
.doc p { margin: 14px 0 0; color: var(--ink-2); font-size: 15px; line-height: 1.85; }
.doc ul, .doc ol { margin: 14px 0 0; padding-left: 20px; color: var(--ink-2); font-size: 15px; line-height: 1.85; }
.doc li { margin: 7px 0; }
.doc li > strong { color: var(--ink); }
.doc a:not(.button) { color: var(--brand); text-decoration: underline; text-underline-offset: 2px; }
.doc a:not(.button):hover { color: var(--brand-dark); }
.doc code { border: 1px solid var(--line); border-radius: 4px; padding: 1px 5px; background: var(--canvas); color: var(--ink); font: 12.5px ui-monospace, SFMono-Regular, Menlo, monospace; }
.doc pre { overflow-x: auto; margin: 16px 0 0; border: 1px solid var(--line); border-radius: 6px; padding: 14px 16px; background: var(--canvas); }
.doc pre code { border: 0; padding: 0; background: none; line-height: 1.7; }

.doc-scroll { overflow-x: auto; margin: 18px 0 0; }
.doc table { width: 100%; min-width: 460px; border-collapse: collapse; font-size: 14px; }
.doc th, .doc td { border-bottom: 1px solid var(--line); padding: 11px 12px; text-align: left; vertical-align: top; line-height: 1.7; }
.doc th { border-bottom-color: var(--line-strong); background: var(--canvas); color: var(--ink); font-weight: 700; }
.doc td { color: var(--ink-2); }
.doc td strong { color: var(--ink); }

.doc-note { margin: 20px 0 0; border: 1px solid var(--line); border-left: 2px solid var(--brand); border-radius: 0 6px 6px 0; padding: 15px 18px; background: var(--brand-soft); color: var(--ink-2); font-size: 14px; line-height: 1.8; }
.doc-note.is-warn { border-left-color: var(--amber); background: var(--amber-soft); }
.doc-note > strong:first-child { display: block; margin-bottom: 4px; color: var(--ink); }
.doc-note strong { color: var(--ink); }
.doc-note :first-child { margin-top: 0; }

.doc-cta { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px; margin: 56px 0 0; border: 1px solid var(--line); border-radius: 8px; padding: 26px 28px; background: #fff; box-shadow: 0 18px 50px -40px rgb(15 23 42 / 30%); }
.doc-cta div { max-width: 420px; }
.doc-cta strong { display: block; color: var(--ink); font-size: 17px; }
.doc-cta p { margin: 7px 0 0; font-size: 13.5px; }

.doc-related { margin: 44px 0 0; border-top: 1px solid var(--line); padding-top: 26px; }
.doc-related h2 { margin: 0 0 4px; padding: 0; border: 0; font-size: 13px; }
.doc-related ul { margin: 10px 0 0; padding: 0; list-style: none; }
.doc-related li { margin: 0; border-top: 1px solid var(--line); }
.doc-related li:first-child { border-top: 0; }
.doc .doc-related a { display: flex; align-items: baseline; gap: 10px; padding: 13px 0; color: var(--ink); font-size: 14.5px; font-weight: 650; text-decoration: none; }
.doc .doc-related a:hover { color: var(--brand); }
.doc-related small { color: var(--ink-3); font-size: 12px; font-weight: 400; }

@media (max-width: 740px) {
  /* 窄屏下标题和说明并排会把标题挤成一栏，改成上下堆叠 */
  .doc .doc-related a { flex-direction: column; gap: 3px; }
  .doc { padding: 60px 0 32px; }
  .doc h1 { font-size: 29px; }
  .doc h2 { margin-top: 40px; padding-top: 24px; font-size: 20px; }
}