:root {
  color-scheme: light dark;
  --bg: #f6f7f4;
  --card: #ffffff;
  --text: #17211d;
  --muted: #65716c;
  --line: #dfe6df;
  --accent: #207a52;
  --accent-soft: #e5f3eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101412;
    --card: #171d1a;
    --text: #edf3ef;
    --muted: #a9b4ae;
    --line: #2b3831;
    --accent: #63c28e;
    --accent-soft: #173624;
  }
}

* {
  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: 1.72;
}

.site-shell {
  width: min(880px, calc(100% - 36px));
  margin: 0 auto;
}

.site-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0 0;
}

.brand-link {
  color: var(--accent);
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}

.language-control {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
}

.language-control select {
  min-height: 34px;
  max-width: min(52vw, 190px);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 30px 5px 12px;
  background: var(--card);
  color: var(--text);
  font: inherit;
}

main {
  padding: 48px 0 64px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.06);
}

.eyebrow {
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
  margin: 0 0 6px;
}

h1 {
  font-size: clamp(30px, 6vw, 48px);
  line-height: 1.12;
  margin: 0 0 10px;
}

h2 {
  font-size: 22px;
  margin: 34px 0 10px;
}

h3 {
  font-size: 17px;
  margin: 22px 0 8px;
}

p,
li {
  font-size: 16px;
}

p {
  margin: 10px 0;
}

ul {
  padding-left: 22px;
}

a {
  color: var(--accent);
  font-weight: 650;
}

.muted {
  color: var(--muted);
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 0;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  text-decoration: none;
}

.notice {
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 26%, transparent);
  border-radius: 14px;
  padding: 14px 16px;
  margin: 20px 0;
}

footer {
  color: var(--muted);
  font-size: 14px;
  margin-top: 26px;
}

footer a {
  font-size: 14px;
}

@media (max-width: 560px) {
  .site-shell {
    width: min(100% - 28px, 880px);
  }

  .site-topbar {
    align-items: flex-start;
    padding-top: 16px;
  }

  .language-control {
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
  }

  main {
    padding: 26px 0 48px;
  }

  .card {
    border-radius: 16px;
    padding: 22px;
  }
}