:root {
  --bg: #fffdf9;
  --panel: #ffffff;
  --text: #292524;
  --text-soft: #57534e;
  --muted: #78716c;
  --accent: #d84518;
  --brand: #f4511e;
  --accent-soft: #fff0e8;
  --border: rgba(67, 20, 7, 0.1);
  --border-strong: rgba(244, 81, 30, 0.35);
  --radius: 20px;
  --radius-sm: 14px;
  --max: 920px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; color-scheme: light; }
body { margin: 0; font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.75; min-height: 100vh; -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, summary:focus-visible { outline: 2px solid var(--brand); outline-offset: 4px; }
.wrap { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }

.topbar { position: sticky; top: 0; z-index: 30; background: rgba(255, 253, 249, 0.96); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; min-height: 72px; padding: 12px 0; gap: 20px; }
.brand { color: var(--text); font-size: 21px; font-weight: 800; letter-spacing: -0.03em; white-space: nowrap; }
.brand:hover { text-decoration: none; }
.brand-divider { color: #d6d3d1; margin: 0 7px; font-weight: 400; }
.brand-section { color: var(--accent); font-size: 15px; font-weight: 600; letter-spacing: 0; }
.nav { display: flex; gap: 6px; }
.nav a { color: var(--text-soft); font-size: 14px; padding: 8px 12px; border-radius: 10px; white-space: nowrap; }
.nav a:hover, .nav a.active { color: var(--accent); background: var(--accent-soft); text-decoration: none; }
main { padding: 48px 0 64px; }

.page-head { margin-bottom: 28px; }
.eyebrow { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; font-size: 11px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin: 0 0 16px; }
.pill { font-size: 11px; letter-spacing: 0; padding: 3px 10px; border-radius: 999px; background: var(--accent-soft); }
h1 { margin: 0 0 12px; font-size: clamp(30px, 5vw, 44px); line-height: 1.2; letter-spacing: -0.035em; font-weight: 750; }
.date-line { margin: 0; color: var(--muted); font-size: 15px; }

.tldr { margin: 24px 0; padding: 24px 26px; background: var(--accent-soft); border: 1px solid #ffddcb; border-radius: var(--radius); }
.tldr h2 { margin: 0 0 16px; font-size: 18px; }
.tldr ol { margin: 0; padding-left: 1.4em; }
.tldr li { padding-left: 4px; margin: 0 0 14px; color: var(--text-soft); font-size: 15px; line-height: 1.85; }
.tldr li:last-child { margin-bottom: 0; }
.tldr li::marker { color: var(--accent); font-weight: 700; }
.tldr strong { color: var(--text); }
.section-nav { display: flex; flex-wrap: wrap; gap: 8px; padding: 8px 0 4px; }
.section-nav a { color: var(--text-soft); font-size: 12px; padding: 7px 11px; border: 1px solid var(--border); border-radius: 999px; background: var(--panel); }
.section-nav a:hover { color: var(--accent); border-color: var(--border-strong); text-decoration: none; }

.section { margin-top: 40px; scroll-margin-top: 94px; }
.section h2 { margin: 0 0 16px; font-size: 20px; font-weight: 700; letter-spacing: -0.02em; }
.section .note { margin: -4px 0 16px; color: var(--muted); font-size: 14px; }
.link-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.link-list li { border: 1px solid var(--border); background: var(--panel); border-radius: var(--radius-sm); padding: 20px 22px; }
.link-list li:hover { border-color: var(--border-strong); }
.link-row { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 14px; }
.link-title { color: var(--text); font-weight: 650; font-size: 17px; line-height: 1.55; flex: 1 1 260px; }
.link-title:hover { color: var(--accent); }
.tag { display: inline-flex; font-size: 11px; color: var(--muted); background: #f5f5f4; border-radius: 999px; padding: 2px 9px; white-space: nowrap; }
.item-detail { margin: 12px 0 0; color: var(--text-soft); font-size: 14px; line-height: 1.9; }
.item-why { margin: 10px 0 0; color: var(--text-soft); font-size: 13px; }
.item-why strong { font-weight: 600; color: var(--text); }
.item-source { margin: 12px 0 0; color: var(--muted); font-size: 12px; }
.related { margin-top: 8px; font-size: 12px; display: flex; flex-wrap: wrap; gap: 6px 16px; }

.poster-section { margin-top: 48px; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; background: var(--panel); }
.poster-heading h2 { margin: 0; font-size: 20px; }
.poster-heading p { margin: 5px 0 0; color: var(--muted); font-size: 14px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 20px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 9px 17px; border-radius: 10px; border: 1px solid var(--border); color: var(--text-soft); font-size: 13px; }
.btn:hover { border-color: var(--border-strong); color: var(--accent); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: white; font-weight: 600; }
.btn.primary:hover { background: #bd3710; }
.download-menu { position: relative; color: var(--muted); font-size: 13px; }
.download-menu summary { padding: 10px 12px; cursor: pointer; }
.download-menu > div { position: absolute; top: 100%; left: 0; z-index: 2; min-width: 170px; padding: 8px; background: white; border: 1px solid var(--border); border-radius: 12px; box-shadow: 0 8px 24px rgba(41, 37, 36, 0.08); }
.download-menu a { display: block; padding: 9px; white-space: nowrap; }
.poster-preview { margin-top: 20px; border-top: 1px solid var(--border); padding-top: 14px; }
.poster-preview summary { cursor: pointer; padding: 8px 0; font-size: 14px; color: var(--text-soft); }
.poster-preview img { display: block; width: 100%; height: auto; margin-top: 16px; border-radius: 12px; }

.day-nav { display: flex; justify-content: space-between; gap: 12px; margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--border); }
.day-nav a { font-size: 14px; padding: 10px 14px; border-radius: 10px; border: 1px solid var(--border); background: var(--panel); }
.day-nav .spacer { flex: 1; }
.archive-list { list-style: none; padding: 0; margin: 24px 0 0; display: flex; flex-direction: column; gap: 12px; }
.archive-list li { border: 1px solid var(--border); background: var(--panel); border-radius: var(--radius-sm); }
.archive-list li:hover { border-color: var(--border-strong); }
.archive-list a { display: grid; grid-template-columns: 120px 1fr; gap: 12px 18px; padding: 20px 22px; color: inherit; text-decoration: none; align-items: baseline; }
.archive-list .d { color: var(--accent); font-weight: 650; font-size: 14px; font-variant-numeric: tabular-nums; }
.archive-list .meta { min-width: 0; }
.archive-list .title { font-weight: 600; margin: 0 0 6px; }
.archive-list .s { color: var(--muted); font-size: 13px; margin: 0; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.footer { border-top: 1px solid var(--border); padding: 28px 0 40px; color: var(--muted); font-size: 12px; background: #fbf8f2; }
.footer .wrap { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; align-items: center; }
.footer a { color: var(--text-soft); }
.empty { padding: 40px 24px; text-align: center; color: var(--muted); border: 1px dashed var(--border); border-radius: var(--radius); }

@media (max-width: 640px) {
  .wrap { width: calc(100% - 32px); }
  .topbar-inner { flex-wrap: wrap; gap: 8px; }
  .brand { font-size: 20px; }
  .nav { width: 100%; margin-left: -10px; }
  .nav a { padding: 6px 10px; font-size: 13px; }
  main { padding: 32px 0 48px; }
  .tldr { padding: 20px; }
  .tldr li { font-size: 14px; }
  .section { scroll-margin-top: 128px; }
  .section h2 { font-size: 18px; }
  .link-list li { padding: 18px; }
  .link-title { font-size: 16px; }
  .poster-section { padding: 20px; }
  .hero-actions { gap: 8px; }
  .archive-list a { grid-template-columns: 1fr; gap: 6px; }
  .day-nav { flex-wrap: wrap; }
  .day-nav .spacer { display: none; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }