:root {
  color-scheme: light;
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #172033;
  --muted: #526070;
  --primary: #1d4ed8;
  --border: #dbe3ef;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
}

a {
  color: var(--primary);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.site-header,
.site-footer,
main {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 0;
}

.brand {
  color: var(--text);
  font-size: 18px;
  font-weight: 800;
  text-decoration: none;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  justify-content: flex-end;
}

nav a {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

nav a:hover {
  color: var(--primary);
}

.hero {
  margin: 24px 0;
  padding: clamp(32px, 7vw, 80px);
  border: 1px solid var(--border);
  border-radius: 28px;
  background: linear-gradient(135deg, #ffffff 0%, #eef5ff 100%);
}

.hero.compact {
  padding: clamp(28px, 5vw, 56px);
}

.eyebrow,
.section-label,
.meta {
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.2;
}

h1 {
  max-width: 900px;
  margin: 8px 0 20px;
  font-size: clamp(38px, 8vw, 76px);
  letter-spacing: -0.05em;
}

h2 {
  margin: 0 0 18px;
  font-size: clamp(26px, 4vw, 42px);
  letter-spacing: -0.03em;
}

h3 {
  margin: 0 0 8px;
  font-size: 20px;
}

.lead {
  max-width: 840px;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
}

.content-section {
  margin: 24px 0;
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--surface);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.card {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: #ffffff;
}

.card p:last-child {
  margin-bottom: 0;
}

.info-list {
  display: grid;
  gap: 16px;
  margin: 0;
}

.info-list div {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.info-list dt {
  color: var(--muted);
  font-weight: 700;
}

.info-list dd {
  margin: 0;
}

.site-footer {
  padding: 36px 0 48px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 720px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    justify-content: flex-start;
  }

  .info-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}