:root {
  color-scheme: light;
  --bg: #f5f1e8;
  --bg-soft: #fbf8f1;
  --surface: #fffdf8;
  --surface-strong: #ffffff;
  --ink: #18211d;
  --muted: #687267;
  --line: #ddd4c5;
  --line-strong: #cbbda7;
  --brand: #0f584d;
  --brand-deep: #0b342f;
  --accent: #b27a2b;
  --accent-soft: #f5e7cd;
  --success: #1f7a4d;
  --warn: #9b5a18;
  --radius: 10px;
  --shadow: 0 18px 48px rgba(41, 33, 20, .10);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 0%, rgba(178,122,43,.14), transparent 28%),
    linear-gradient(180deg, #fbf8ef 0%, var(--bg) 42%, #f7f4ed 100%);
  line-height: 1.76;
  text-rendering: optimizeLegibility;
}

a { color: #0e5f9f; text-decoration: none; text-underline-offset: 3px; }
a:hover { text-decoration: underline; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 253, 248, .92);
  border-bottom: 1px solid rgba(221, 212, 197, .82);
  backdrop-filter: blur(18px);
}

.topbar-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 22px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--brand-deep);
  font-weight: 800;
  letter-spacing: .01em;
}

.brand::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #e2c17b);
  box-shadow: 0 0 0 4px rgba(178, 122, 43, .12);
}

.nav { display: flex; gap: 8px; flex-wrap: wrap; font-size: 13px; }
.nav a {
  color: #314139;
  border: 1px solid rgba(203, 189, 167, .75);
  background: rgba(255, 255, 255, .62);
  border-radius: 999px;
  padding: 5px 10px;
}

main { max-width: 1120px; margin: 0 auto; padding: 34px 22px 82px; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(280px, .82fr);
  gap: 22px;
  align-items: stretch;
  padding: 8px 0 24px;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.16;
  letter-spacing: -.02em;
}

.hero p { color: var(--muted); margin: 9px 0; max-width: 760px; }

.hero > div:first-child,
article {
  background: rgba(255, 253, 248, .93);
  border: 1px solid rgba(221, 212, 197, .9);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero > div:first-child { padding: 30px; }

.fact-panel,
.card {
  background: rgba(255, 255, 255, .86);
  border: 1px solid rgba(221, 212, 197, .86);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 10px 30px rgba(41, 33, 20, .06);
}

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.chip {
  border: 1px solid rgba(15, 88, 77, .20);
  color: #0f584d;
  background: #eef7f3;
  border-radius: 999px;
  padding: 5px 11px;
  font-size: 13px;
  font-weight: 650;
}

.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.card h3 { margin: 0 0 8px; font-size: 18px; letter-spacing: -.01em; }
.card p { margin: 6px 0; color: var(--muted); }

article { padding: clamp(22px, 4vw, 36px); }
article h1 { font-size: clamp(26px, 3.2vw, 40px); line-height: 1.24; margin: 0 0 18px; letter-spacing: -.018em; }
article h2 {
  font-size: 22px;
  margin: 32px 0 14px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  letter-spacing: -.01em;
}
article h3 { font-size: 18px; margin: 22px 0 10px; }
article p { margin: 10px 0; }
article strong { color: #121a16; }

article > p:first-of-type {
  color: #465047;
  font-size: 17px;
  padding: 14px 16px;
  border-left: 4px solid var(--accent);
  background: linear-gradient(90deg, var(--accent-soft), rgba(245, 231, 205, .18));
  border-radius: 8px;
}

ul, ol { padding-left: 22px; }
li { margin: 7px 0; }

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 16px 0 20px;
  font-size: 15px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

th, td { border-bottom: 1px solid var(--line); padding: 11px 13px; vertical-align: top; }
tr:last-child th, tr:last-child td { border-bottom: 0; }
th {
  width: 168px;
  background: #f3eadc;
  color: #39433b;
  text-align: left;
  font-weight: 750;
}
td { background: rgba(255, 255, 255, .72); }

.source-list { font-size: 14px; color: var(--muted); }
.footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; margin-top: 36px; padding-top: 18px; }

code {
  border: 1px solid var(--line);
  background: #f7f0e5;
  border-radius: 6px;
  padding: 1px 5px;
}

@media (max-width: 760px) {
  main { padding: 18px 14px 64px; }
  .hero, .grid { grid-template-columns: 1fr; }
  .hero > div:first-child, article, .fact-panel, .card { border-radius: 8px; }
  .hero > div:first-child, article { padding: 20px; }
  .topbar-inner { align-items: flex-start; flex-direction: column; padding: 12px 16px; }
  .nav { width: 100%; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 2px; }
  .nav a { white-space: nowrap; }
  th, td { display: block; width: 100%; }
  th { border-bottom: 0; padding-bottom: 4px; }
  td { padding-top: 4px; }
}