:root {
  --bg: #f6f4ec;
  --paper: #fffdf8;
  --ink: #1f1c17;
  --muted: #6a6459;
  --line: rgba(31, 28, 23, 0.12);
  --accent: #a43220;
  --accent-strong: #7d1f11;
  --accent-soft: rgba(164, 50, 32, 0.1);
  --shadow: 0 20px 50px rgba(44, 33, 18, 0.08);
  --radius: 24px;
  --max: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top right, rgba(164, 50, 32, 0.08), transparent 24rem),
    linear-gradient(180deg, #fbf8ef 0%, var(--bg) 100%);
  line-height: 1.75;
}

a {
  color: inherit;
}

.page-shell {
  width: min(calc(100% - 2rem), var(--max));
  margin: 0 auto;
  padding: 1.25rem 0 4rem;
}

.topbar,
.hero,
.panel,
.footer {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.topbar,
.panel,
.footer {
  padding: 1rem 1.1rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.brand strong {
  font-size: 1.05rem;
}

.brand span,
.meta,
.lede,
.muted,
.card p,
.panel p,
.footer p {
  color: var(--muted);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.78rem 1.1rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  text-decoration: none;
  font-weight: 600;
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff8f3;
}

.btn-primary:hover {
  background: var(--accent-strong);
}

.hero {
  margin-top: 1rem;
  padding: 1.8rem 1.35rem;
}

.eyebrow {
  margin: 0 0 0.6rem;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1,
.panel h2,
.panel h3 {
  margin: 0;
  line-height: 1.25;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  max-width: 12em;
}

.lede {
  margin-top: 0.9rem;
  max-width: 46rem;
  font-size: 1.02rem;
}

.hero-points,
.checklist,
.faq-list,
.related-list,
.breadcrumb {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
}

.hero-points li,
.checklist li,
.faq-list li,
.related-list li {
  margin: 0.35rem 0;
}

.grid {
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  display: block;
  padding: 1.15rem;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  text-decoration: none;
}

.card:hover {
  border-color: rgba(164, 50, 32, 0.35);
  transform: translateY(-1px);
}

.card strong {
  display: block;
  margin-bottom: 0.45rem;
  font-size: 1.05rem;
}

.panel {
  margin-top: 1rem;
}

.panel h2 {
  font-size: 1.55rem;
  margin-bottom: 0.75rem;
}

.panel h3 {
  font-size: 1.1rem;
  margin-top: 0;
  margin-bottom: 0.55rem;
}

.panel + .panel {
  margin-top: 1rem;
}

.prose p,
.prose ul,
.prose ol,
.prose h3,
.prose h4 {
  margin-top: 0;
  margin-bottom: 0.95rem;
}

.prose ul,
.prose ol {
  padding-left: 1.25rem;
}

.prose li {
  margin: 0.35rem 0;
}

.prose code {
  padding: 0.12rem 0.38rem;
  border-radius: 8px;
  background: rgba(31, 28, 23, 0.07);
  font-size: 0.92em;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.9rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.32rem;
  padding: 0.38rem 0.7rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.9rem;
}

.tag-label {
  opacity: 0.8;
}

.panel-note {
  padding: 0.95rem 1rem;
  border-radius: 18px;
  background: rgba(164, 50, 32, 0.06);
  border: 1px solid rgba(164, 50, 32, 0.12);
}

.metric-grid,
.story-grid {
  display: grid;
  gap: 0.85rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.metric-card,
.story-card,
.timeline-item {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}

.metric-card {
  padding: 1rem;
}

.metric-card strong {
  display: block;
  margin-top: 0.25rem;
  font-size: 1.3rem;
}

.metric-label,
.story-mini,
.metric-delta,
.timeline-item p,
.story-lede {
  color: var(--muted);
}

.metric-label,
.metric-delta {
  display: block;
}

.metric-delta {
  margin-top: 0.35rem;
  font-size: 0.9rem;
}

.metric-delta-up {
  color: #0f7a46;
}

.metric-delta-down {
  color: #a43220;
}

.story-card {
  padding: 1rem 1rem 0.9rem;
}

.story-card h3 {
  margin-bottom: 0.5rem;
}

.story-lede {
  margin-top: 0;
  margin-bottom: 0.85rem;
}

.story-facts {
  margin: 0;
  padding-left: 1.1rem;
}

.story-facts li {
  margin: 0.3rem 0;
}

.story-facts span {
  color: var(--muted);
  margin-right: 0.35rem;
}

.timeline-list {
  display: grid;
  gap: 0.8rem;
}

.timeline-item {
  padding: 0.95rem 1rem;
}

.timeline-item strong {
  display: block;
  margin-bottom: 0.35rem;
}

.footer {
  margin-top: 1rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.1rem;
  margin-top: 0.75rem;
}

.footer-links a {
  text-decoration: none;
  font-weight: 600;
}

.breadcrumb {
  color: var(--muted);
}

.breadcrumb a {
  text-decoration: none;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.1rem;
}

.split {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1.2fr 0.8fr;
}

@media (max-width: 880px) {
  .grid-3,
  .grid-2,
  .split,
  .metric-grid,
  .story-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }
}