:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --ink: #1c1c1a;
  --ink-2: #57544e;
  --ink-3: #8b877e;
  --line: #e7e3d9;
  --line-soft: #f0ede5;
  --accent: #1f4e5f;
  --accent-soft: #e8eff2;
  --warm: #b8552f;
  --warm-soft: #f7ece7;
  --gold: #b08a2e;
  --radius: 3px;
  --sans: "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue",
          "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 32px; }

/* ---------- header ---------- */

.site-head {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.site-head .wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding-top: 18px;
  padding-bottom: 18px;
  flex-wrap: wrap;
}

.brand { display: flex; align-items: baseline; gap: 14px; }

.brand-mark {
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.brand-sub {
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: 0.01em;
}

.site-nav { display: flex; gap: 26px; flex-wrap: wrap; }

.site-nav a {
  font-size: 13.5px;
  color: var(--ink-2);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color .15s, border-color .15s;
}

.site-nav a:hover { color: var(--accent); border-bottom-color: var(--accent); }
.site-nav a.on { color: var(--accent); border-bottom-color: var(--accent); }

.site-nav a.off {
  color: #c3bfb5;
  cursor: default;
  pointer-events: none;
}

/* ---------- hero ---------- */

.hero { padding: 64px 0 48px; border-bottom: 1px solid var(--line); }

.hero-kicker {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 18px;
}

.hero h1 {
  font-size: 40px;
  line-height: 1.28;
  font-weight: 500;
  letter-spacing: -0.015em;
  margin: 0 0 20px;
  max-width: 760px;
}

.hero-lead {
  font-size: 16px;
  color: var(--ink-2);
  max-width: 660px;
  margin: 0;
}

.hero-lead em {
  font-style: normal;
  color: var(--warm);
  font-weight: 500;
}

/* ---------- kpi ---------- */

.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin: 0 0 56px;
}

.kpi {
  background: var(--surface);
  padding: 26px 24px 24px;
}

.kpi-label {
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
  margin: 0 0 10px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.kpi-year {
  font-size: 11px;
  color: #b3aea3;
  font-variant-numeric: tabular-nums;
}

.kpi-value {
  font-size: 34px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}

.kpi-value .unit {
  font-size: 15px;
  color: var(--ink-3);
  margin-left: 5px;
  letter-spacing: 0;
}

.kpi-note {
  font-size: 12.5px;
  color: var(--ink-3);
  margin: 9px 0 0;
}

.kpi-note.down { color: var(--warm); }

/* ---------- section ---------- */

.section { margin: 0 0 64px; }

.section-head { margin-bottom: 22px; }

.section-head h2 {
  font-size: 21px;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}

.section-head p {
  font-size: 14px;
  color: var(--ink-2);
  margin: 0;
  max-width: 720px;
}

.chart {
  width: 100%;
  height: 400px;
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 20px 12px 12px;
}

.chart.short { height: 330px; }

/* ---------- next up ---------- */

.next-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.next-card {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 22px 20px;
  min-height: 132px;
}

a.next-card {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: border-color .16s, background .16s;
}

a.next-card:hover { border-color: var(--accent); background: #fdfcf9; }
a.next-card:hover .t { color: var(--accent); }

.next-card .t {
  font-size: 14.5px;
  font-weight: 500;
  margin: 0 0 8px;
  color: var(--ink);
}

.next-card .d {
  font-size: 13px;
  color: var(--ink-3);
  margin: 0;
  line-height: 1.6;
}

.next-card .badge {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: #a9a49a;
  border: 1px solid var(--line);
  padding: 1px 7px;
  margin-top: 12px;
}

/* ---------- footer ---------- */

.site-foot {
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding: 36px 0 48px;
  margin-top: 24px;
}

.site-foot p {
  font-size: 12.5px;
  color: var(--ink-3);
  margin: 0 0 7px;
  max-width: 860px;
  line-height: 1.75;
}

.site-foot strong { font-weight: 500; color: var(--ink-2); }

.site-foot a { color: var(--accent); text-decoration: none; }
.site-foot a:hover { text-decoration: underline; }

.loading {
  padding: 80px 0;
  text-align: center;
  color: var(--ink-3);
  font-size: 14px;
}

.err {
  padding: 20px 24px;
  border: 1px solid #e5c9bd;
  background: var(--warm-soft);
  color: #7d3a22;
  font-size: 13.5px;
}

/* ---------- 子页面标题 ---------- */

.page-head {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.page-head h1 {
  font-size: 34px;
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 1.32;
  margin: 0 0 16px;
  max-width: 720px;
}

.page-head .lead {
  font-size: 15.5px;
  color: var(--ink-2);
  max-width: 700px;
  margin: 0;
}

.page-head .lead em { font-style: normal; color: var(--warm); font-weight: 500; }

/* ---------- 关键事实 ---------- */

.facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin: 0 0 48px;
}

.fact { background: var(--surface); padding: 22px 22px 20px; }

.fact .n {
  font-size: 12.5px;
  color: var(--ink-3);
  margin: 0 0 10px;
  letter-spacing: 0.02em;
}

.fact .v {
  font-size: 23px;
  font-weight: 400;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  line-height: 1.15;
}

.fact .v .u { font-size: 13px; color: var(--ink-3); margin-left: 4px; }

.fact .t { font-size: 12.5px; color: var(--ink-2); margin: 8px 0 0; line-height: 1.6; }

/* ---------- 数据表 ---------- */

.table-wrap { overflow-x: auto; border: 1px solid var(--line); background: var(--surface); }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  min-width: 520px;
}

.data-table th {
  text-align: left;
  font-weight: 500;
  color: var(--ink-2);
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
  background: #faf9f5;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--line-soft);
  font-variant-numeric: tabular-nums;
}

.data-table tr:last-child td { border-bottom: none; }
.data-table td.num, .data-table th.num { text-align: right; }
.data-table tbody tr:hover { background: #fcfbf8; }

/* ---------- 注释 ---------- */

.note {
  font-size: 12.5px;
  color: var(--ink-3);
  line-height: 1.8;
  margin: 14px 0 0;
  max-width: 860px;
}

.note strong { color: var(--ink-2); font-weight: 500; }

/* ---------- 双列 ---------- */

.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

.chart.tall { height: 560px; }

.tag {
  display: inline-block;
  font-size: 11.5px;
  padding: 1px 8px;
  border: 1px solid var(--line);
  color: var(--ink-3);
  margin-left: 8px;
  vertical-align: middle;
}

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .wrap { padding: 0 20px; }
  .hero { padding: 44px 0 36px; }
  .hero h1 { font-size: 28px; }
  .page-head { padding: 40px 0 30px; }
  .page-head h1 { font-size: 26px; }
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
  .facts { grid-template-columns: 1fr; }
  .cols { grid-template-columns: 1fr; }
  .next-grid { grid-template-columns: repeat(2, 1fr); }
  .chart { height: 320px; }
  .chart.tall { height: 420px; }
}

@media (max-width: 520px) {
  .kpi-row { grid-template-columns: 1fr; }
  .next-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 24px; }
  .site-nav { gap: 16px; }
}