/* /learn/ 文章页和列表页。叠在 legal.css 之上（共用配色、header、footer）。 */
.learn .wrap { width: min(700px, calc(100% - 32px)); }
.learn header nav a.nav-cta { color: var(--gold); font-weight: 650; }
.learn main { padding: 44px 0 72px; }

.crumbs { margin: 0 0 14px; font-size: 14px; color: var(--faint); display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.crumbs a { color: var(--dim); text-decoration: none; }
.crumbs a:hover { color: var(--gold); }
.tag { display: inline-block; padding: 1px 9px; border: 1px solid var(--line); border-radius: 999px; font-size: 12px; color: var(--dim); }
.tag.draft { border-color: var(--accent-soft); color: var(--gold); }

.learn h1 { margin: 0 0 14px; font-size: clamp(27px, 6.2vw, 40px); line-height: 1.2; letter-spacing: -0.015em; }
.lede { margin: 0 0 14px; font-size: 18px; line-height: 1.6; color: var(--dim); }
.byline { margin: 0 0 28px; font-size: 14px; color: var(--faint); }

.box { margin: 0 0 28px; padding: 16px 20px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
.box > :last-child { margin-bottom: 0; }
.box-label { margin: 0 0 6px; font-size: 12px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--gold); }
.box-tldr { border-color: var(--accent-soft); }
.box-owner { border: 1px dashed var(--gold); background: transparent; }
.box-owner .box-label { color: var(--gold); }

/* legal.css 给所有 nav 加了 margin-left:auto，这里的 nav 是块级内容，重置掉 */
.toc { display: block; margin: 0 0 32px; padding: 14px 20px; border-left: 2px solid var(--line); }
.toc ul { margin: 0; padding: 0; list-style: none; }
.toc li { margin: 3px 0; font-size: 15px; }
.toc a { color: var(--dim); text-decoration: none; }
.toc a:hover { color: var(--gold); }

.prose { font-size: 17.5px; line-height: 1.8; }
.prose h2 { margin: 52px 0 14px; font-size: 25px; line-height: 1.3; letter-spacing: -0.01em; scroll-margin-top: 16px; }
.prose h3 { margin: 30px 0 8px; font-size: 19px; line-height: 1.4; }
.prose p { margin: 0 0 1.15em; }
.prose p, .prose li { color: var(--text); }
.prose li { margin: 0 0 0.55em; }
.prose .apply { margin: 1.4em 0; padding: 14px 18px; border-left: 3px solid var(--gold); border-radius: 0 12px 12px 0; background: var(--panel); }
.prose .ts a { display: inline-block; margin-left: 2px; padding: 0 7px; border: 1px solid var(--line); border-radius: 999px; font-size: 12.5px; line-height: 1.7; vertical-align: 2px; color: var(--dim); text-decoration: none; font-variant-numeric: tabular-nums; }
.prose .ts a:hover { color: var(--gold); border-color: var(--gold); }
.prose strong { color: var(--fg); }
.prose ol, .prose ul { padding-left: 24px; }
.prose a { text-underline-offset: 2px; }
.prose code { padding: 1px 5px; border-radius: 5px; background: var(--panel); font-size: 0.92em; }
.prose blockquote { margin: 18px 0; padding: 2px 0 2px 18px; border-left: 2px solid var(--gold); color: var(--dim); }

.cta { margin: 44px 0 24px; padding: 22px 22px 24px; border: 1px solid var(--accent-soft); border-radius: 16px; background: var(--panel); }
.cta .cta-title { margin: 0 0 6px; font-size: 19px; font-weight: 700; color: var(--fg); }
.cta p { color: var(--dim); }
.btn { display: inline-block; margin-top: 6px; padding: 11px 20px; border-radius: 999px; background: var(--gold); color: var(--on-accent); font-weight: 700; text-decoration: none; }
.author-box { padding-top: 18px; border-top: 1px solid var(--line); font-size: 14px; color: var(--faint); }

.related { padding-top: 36px; }
.related h2, .stage h2 { margin: 0 0 6px; font-size: 21px; }
.cards { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 12px; }
.cards li { margin: 0; }
.card { display: block; padding: 16px 18px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); text-decoration: none; color: var(--fg); }
.card:hover { border-color: var(--accent-soft); }
.card-meta { display: block; font-size: 12px; color: var(--faint); letter-spacing: 0.03em; }
.card-title { display: block; margin: 4px 0; font-size: 17px; font-weight: 700; line-height: 1.35; }
.card-desc { display: block; font-size: 14px; color: var(--dim); line-height: 1.55; }

.stage-nav { margin: 18px 0 8px; display: flex; flex-wrap: wrap; gap: 8px; }
.stage-nav a { padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px; font-size: 14px; color: var(--dim); text-decoration: none; }
.stage-nav a span { margin-left: 6px; color: var(--faint); font-size: 12px; }
.stage-nav a:hover { color: var(--gold); border-color: var(--accent-soft); }
.stage { padding-top: 34px; scroll-margin-top: 12px; }
.stage-blurb { margin: 0; color: var(--faint); font-size: 15px; }
.empty { margin: 10px 0 0; color: var(--faint); font-size: 14px; font-style: italic; }

.learn footer .legal-links { display: flex; flex-wrap: wrap; gap: 14px; }

@media (max-width: 620px) {
  .learn header .wrap { flex-wrap: nowrap; padding: 0; min-height: 58px; }
  .learn header nav { width: auto; margin-left: auto; gap: 12px; }
  .learn main { padding-top: 30px; }
  .lede { font-size: 16.5px; }
  .prose { font-size: 17px; line-height: 1.78; }
  .prose h2 { margin-top: 44px; font-size: 22px; }
  .prose .apply { padding: 12px 14px; }
}

/* 白天：正文换衬线体，接近 Claude 的长文阅读体验；标题、界面元素仍是无衬线 */
:root[data-theme="light"] .prose { font-family: ui-serif, "Iowan Old Style", Georgia, "Times New Roman", "Songti SC", serif; font-size: 18px; }
:root[data-theme="light"] .prose .box-label, :root[data-theme="light"] .prose .ts, :root[data-theme="light"] .prose .toc { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif; }
:root[data-theme="light"] .box, :root[data-theme="light"] .card, :root[data-theme="light"] .cta { box-shadow: 0 1px 2px rgba(31,30,29,.04); }
:root[data-theme="light"] .prose .apply { background: #f3f0fa; }
:root[data-theme="light"] .box-tldr { background: #f6f3fd; }

/* 窄屏：Learn 入口收进页脚，保证一行放下 */
@media (max-width: 420px) { .learn header nav a.nav-learn { display: none; } }

/* ── /gear/ 装备推荐 ── */
.gear-disclosure { margin-top: 18px; }
.gear-grid { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.gear-card { display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 16px; background: var(--panel); overflow: hidden; }
.gear-card.is-example { border-style: dashed; }
.gear-img { aspect-ratio: 4 / 3; display: grid; place-items: center; background: var(--bg); border-bottom: 1px solid var(--line); font-size: 44px; }
.gear-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.gear-body { padding: 14px 16px 18px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.gear-brand { margin: 0; font-size: 13px; color: var(--faint); }
.gear-body h3 { margin: 0; font-size: 17px; line-height: 1.35; }
.gear-body ul { margin: 4px 0 0; padding-left: 18px; font-size: 14.5px; color: var(--dim); }
.gear-body li { margin: 3px 0; }
.gear-code { margin: 4px 0 0; font-size: 13.5px; color: var(--dim); }
.gear-btn { margin-top: auto; align-self: flex-start; }