:root {
  --ink: #17211d;
  --muted: #607069;
  --paper: #f5f3ed;
  --card: #fff;
  --line: #d8ddd7;
  --green: #174f3a;
  --mint: #dcebe3;
  --amber: #a75b10;
  --rose: #923f46;
  --blue: #315c76;
  --max: 1160px;
  --shadow: 0 12px 35px rgba(23, 33, 29, 0.08);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.72;
}
a {
  color: inherit;
}
img,
svg {
  max-width: 100%;
}
.wrap {
  width: min(calc(100% - 32px), var(--max));
  margin: auto;
}
.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 16px;
  top: 8px;
  background: #fff;
  padding: 8px;
  z-index: 99;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(245, 243, 237, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  text-decoration: none;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.brand small {
  display: block;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 500;
}
.nav-links {
  display: flex;
  gap: 8px;
  align-items: center;
}
.nav-links a {
  text-decoration: none;
  font-size: 0.9rem;
  padding: 8px 11px;
  border-radius: 20px;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  background: var(--mint);
  color: var(--green);
}
.menu {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 8px 11px;
}
.hero {
  padding: 90px 0 58px;
}
.eyebrow {
  color: var(--green);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 5.6rem);
  line-height: 1.04;
  letter-spacing: -0.055em;
  margin: 0.2em 0;
  max-width: 940px;
}
.lead {
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  max-width: 760px;
  color: var(--muted);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.7fr;
  gap: 28px;
  align-items: end;
}
.snapshot {
  background: var(--ink);
  color: #fff;
  padding: 24px;
  border-radius: 18px;
}
.snapshot strong {
  font-size: 2.3rem;
  display: block;
}
.snapshot span {
  color: #b9c7c0;
}
.section {
  padding: 58px 0;
}
.section.alt {
  background: #e9ece7;
}
.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 28px;
}
.section h2,
.page-head h1 {
  font-size: clamp(1.8rem, 3.5vw, 3.2rem);
  letter-spacing: -0.035em;
  line-height: 1.15;
  margin: 0.2em 0;
}
.section-head p {
  max-width: 560px;
  color: var(--muted);
}
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow);
}
.card h3 {
  margin: 0.2em 0 0.4em;
  font-size: 1.15rem;
}
.card p {
  color: var(--muted);
  margin: 0.4em 0;
}
.num {
  font:
    700 2rem/1 Georgia,
    serif;
  color: var(--green);
}
.tag {
  display: inline-flex;
  align-items: center;
  border-radius: 20px;
  padding: 4px 9px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}
.fact {
  background: #dce9ef;
  color: var(--blue);
}
.infer {
  background: #eee6d5;
  color: #74541f;
}
.forecast {
  background: var(--mint);
  color: var(--green);
}
.counter {
  background: #f2dfe1;
  color: var(--rose);
}
.unknown {
  background: #e8e5ed;
  color: #605776;
}
.stack {
  display: grid;
  gap: 12px;
}
.evidence {
  border-left: 4px solid var(--line);
  background: #fff;
  padding: 18px 20px;
  border-radius: 0 12px 12px 0;
}
.evidence.factbox {
  border-color: var(--blue);
}
.evidence.forecastbox {
  border-color: var(--green);
}
.evidence.counterbox {
  border-color: var(--rose);
}
.evidence h3 {
  margin: 0 0 6px;
}
.metric-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.metric {
  border-top: 1px solid var(--line);
  padding: 16px 0;
}
.metric b {
  display: block;
}
.metric span {
  color: var(--muted);
  font-size: 0.9rem;
}
.cta {
  background: var(--green);
  color: #fff;
  border-radius: 20px;
  padding: 38px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}
.button {
  display: inline-block;
  text-decoration: none;
  background: #fff;
  color: var(--green);
  font-weight: 800;
  padding: 11px 17px;
  border-radius: 9px;
}
.page-head {
  padding: 70px 0 35px;
  border-bottom: 1px solid var(--line);
}
.page-head p {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.12rem;
}
.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}
.toc a {
  text-decoration: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 20px;
  padding: 7px 12px;
  font-size: 0.85rem;
}
.prose {
  max-width: 820px;
}
.prose h2 {
  margin-top: 2.2em;
}
.prose h3 {
  margin-top: 1.7em;
}
.prose p,
.prose li {
  color: #34423c;
}
.table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}
table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}
th,
td {
  text-align: left;
  vertical-align: top;
  padding: 15px;
  border-bottom: 1px solid var(--line);
}
th {
  background: #edf0ec;
  font-size: 0.82rem;
}
td {
  font-size: 0.9rem;
}
.ledger-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 18px;
}
.ledger-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
}
.confidence {
  font:
    700 1.5rem Georgia,
    serif;
  color: var(--green);
}
.signal-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.signal-list > div {
  padding: 13px;
  background: #f0f2ee;
  border-radius: 9px;
}
.card-link {
  margin: 18px 0 0;
}
.card-link a,
.source-links a {
  color: var(--green);
  font-weight: 700;
}
.source-card {
  margin: 18px 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}
.source-card > div:first-child {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}
.source-card time {
  color: var(--muted);
  font-size: 0.85rem;
}
.source-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 0;
}
.change-log {
  padding: 20px;
  border-left: 4px solid var(--gold);
  background: #f7f3e9;
  border-radius: 0 10px 10px 0;
}
.footer {
  border-top: 1px solid var(--line);
  padding: 35px 0;
  color: var(--muted);
  font-size: 0.88rem;
}
.footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 20px;
}
.footer a {
  color: var(--green);
}
@media (max-width: 820px) {
  .menu {
    display: block;
  }
  .nav-links {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 64px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 10px;
    box-shadow: var(--shadow);
    flex-direction: column;
    align-items: stretch;
  }
  .nav-links.open {
    display: flex;
  }
  .hero {
    padding-top: 62px;
  }
  .hero-grid,
  .grid,
  .metric-row {
    grid-template-columns: 1fr;
  }
  .section-head,
  .cta {
    align-items: start;
    flex-direction: column;
  }
  .grid {
    gap: 12px;
  }
  .signal-list {
    grid-template-columns: 1fr;
  }
  .footer .wrap {
    flex-direction: column;
  }
  .section {
    padding: 42px 0;
  }
  .page-head {
    padding-top: 48px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}