:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: #f5f7fa;
  color: #172033;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
}

a {
  color: #1261c9;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  background: #ffffff;
  border-bottom: 1px solid #dde3ec;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 920px;
  margin: 0 auto;
  padding: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #172033;
  font-weight: 700;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: #1f7a5c;
  color: #ffffff;
  font-size: 16px;
  line-height: 1;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 14px;
}

main {
  max-width: 920px;
  margin: 0 auto;
  padding: 40px 16px 64px;
}

.page-title {
  max-width: 720px;
}

h1 {
  margin: 0 0 14px;
  font-size: 34px;
  line-height: 1.2;
  letter-spacing: 0;
}

h2 {
  margin: 32px 0 12px;
  font-size: 22px;
  line-height: 1.3;
}

h3 {
  margin: 20px 0 8px;
  font-size: 17px;
}

p,
li {
  color: #495467;
  font-size: 16px;
  line-height: 1.75;
}

ul {
  padding-left: 22px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.summary-item {
  min-height: 118px;
  border: 1px solid #dde3ec;
  border-radius: 8px;
  background: #ffffff;
  padding: 16px;
}

.summary-item strong {
  display: block;
  margin-bottom: 8px;
  color: #172033;
}

.content-panel {
  margin-top: 24px;
  border: 1px solid #dde3ec;
  border-radius: 8px;
  background: #ffffff;
  padding: 22px;
}

.notice {
  border-left: 4px solid #1f7a5c;
  background: #eef8f4;
  padding: 14px 16px;
  color: #315a4b;
}

.site-footer {
  border-top: 1px solid #dde3ec;
  background: #ffffff;
}

.footer-inner {
  max-width: 920px;
  margin: 0 auto;
  padding: 18px 16px;
  color: #677386;
  font-size: 14px;
}

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

  .nav-links {
    flex-wrap: wrap;
  }

  main {
    padding-top: 28px;
  }

  h1 {
    font-size: 28px;
  }

  .summary-grid {
    grid-template-columns: 1fr;
  }
}