:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #5b6678;
  --line: #d9e0e8;
  --soft: #f4f7fb;
  --panel: #ffffff;
  --brand: #116149;
  --brand-2: #1f6f99;
  --warn: #8a4b12;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: #f8fafc;
  line-height: 1.72;
}

a {
  color: var(--brand-2);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  background: #ffffff;
  border-bottom: 1px solid var(--line);
}

.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  font-weight: 700;
  font-size: 20px;
  color: var(--brand);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 14px;
}

.hero {
  background: linear-gradient(180deg, #ffffff 0%, #edf6f3 100%);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 44px 20px 34px;
}

.eyebrow {
  color: var(--brand);
  font-size: 14px;
  font-weight: 700;
  margin: 0 0 8px;
}

h1 {
  font-size: 34px;
  line-height: 1.25;
  margin: 0 0 16px;
  letter-spacing: 0;
}

.summary {
  max-width: 860px;
  font-size: 17px;
  color: #2e3a4d;
  margin: 0;
}

.meta-strip {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px 20px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.meta-item {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  min-height: 76px;
}

.meta-item strong {
  display: block;
  font-size: 14px;
  color: var(--muted);
}

.meta-item span {
  display: block;
  margin-top: 4px;
  font-weight: 700;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 20px 42px;
}

.section {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  margin-bottom: 18px;
}

h2 {
  font-size: 22px;
  line-height: 1.35;
  margin: 0 0 12px;
}

h3 {
  font-size: 17px;
  margin: 18px 0 8px;
}

p {
  margin: 8px 0;
}

ul,
ol {
  margin: 8px 0 0 22px;
  padding: 0;
}

li {
  margin: 5px 0;
}

.answer {
  border-left: 4px solid var(--brand);
  background: #eef8f4;
  padding: 14px 16px;
  margin: 14px 0 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
  font-size: 15px;
}

th,
td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--soft);
}

.boundary {
  border-color: #e6cba8;
  background: #fff8ef;
}

.boundary h2 {
  color: var(--warn);
}

.footer {
  border-top: 1px solid var(--line);
  padding: 22px 20px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  background: #ffffff;
}

@media (max-width: 760px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  h1 {
    font-size: 28px;
  }

  .meta-strip,
  .grid-2 {
    grid-template-columns: 1fr;
  }
}