:root {
  color-scheme: light;
  --background: #f5f7f8;
  --text: #25343e;
  --muted: #56636c;
  --line: #dbe3e8;
  --accent: #536e80;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  color: var(--text);
  background: var(--background);
}

* { box-sizing: border-box; }
body { margin: 0; }
.page {
  width: min(100%, 800px);
  min-height: 100vh;
  min-height: 100svh;
  margin: 0 auto;
  padding: 48px 40px 28px;
  display: flex;
  flex-direction: column;
}
.site-label {
  display: inline-block;
  padding-left: 12px;
  border-left: 3px solid var(--accent);
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}
main { flex: 1; padding: clamp(72px, 18vh, 180px) 0 96px; }
h1 {
  margin: 0 0 24px;
  font-size: clamp(36px, 6vw, 52px);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.08em;
}
.description { margin: 0; color: var(--muted); font-size: 17px; line-height: 1.9; }
footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}
@media (max-width: 480px) {
  .page { padding: 32px 24px 24px; }
  main { padding-top: 96px; }
  .description { max-width: 19em; font-size: 16px; }
}