:root {
  color-scheme: light;
  --bg: #f7f8f6;
  --surface: #ffffff;
  --text: #17211c;
  --muted: #5d6a62;
  --line: #dfe5df;
  --accent: #1f7a5c;
  --accent-dark: #155f47;
  --soft: #e8f3ee;
  --warning: #8a5a12;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.72;
}

a {
  color: var(--accent-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
}

.nav {
  max-width: 980px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 14px;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--accent-dark);
}

.page {
  max-width: 880px;
  margin: 0 auto;
  padding: 48px 24px 64px;
}

.hero {
  padding: 34px 0 22px;
}

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

h1 {
  margin: 0 0 14px;
  font-size: 40px;
  line-height: 1.18;
  letter-spacing: 0;
}

h2 {
  margin: 38px 0 12px;
  font-size: 24px;
  line-height: 1.35;
  letter-spacing: 0;
}

h3 {
  margin: 26px 0 8px;
  font-size: 18px;
  line-height: 1.4;
  letter-spacing: 0;
}

p {
  margin: 0 0 16px;
}

ul,
ol {
  margin: 0 0 18px;
  padding-left: 24px;
}

li {
  margin: 6px 0;
}

.lede {
  max-width: 720px;
  color: var(--muted);
  font-size: 18px;
}

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

.notice {
  margin: 24px 0;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  background: var(--surface);
  border-radius: 8px;
}

.notice.warning {
  border-left-color: var(--warning);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 28px 0 36px;
}

.card {
  display: block;
  min-height: 170px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
}

.card:hover {
  border-color: #9ec6b6;
  background: #fbfdfb;
}

.card h2 {
  margin: 0 0 10px;
  font-size: 20px;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.support-list {
  padding-left: 0;
  list-style: none;
}

.support-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.footer-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 22px 24px;
}

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

  .page {
    padding-top: 28px;
  }

  h1 {
    font-size: 32px;
  }

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