:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --border: #e3e2dd;
  --text: #26262a;
  --muted: #6b6b66;
  --accent: #185fa5;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 48px 20px 64px;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

.wrap { max-width: 720px; margin: 0 auto; }

.hero { text-align: center; margin-bottom: 40px; }

.badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  background: #e1f5ee;
  color: #0f6e56;
  font-size: 13px;
  margin-bottom: 16px;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: 40px;
  font-weight: 600;
  letter-spacing: -0.5px;
}

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

.clock-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  text-align: center;
  margin-bottom: 24px;
}

.label { font-size: 13px; color: var(--muted); }

.clock {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 36px;
  font-weight: 500;
  margin: 6px 0;
  letter-spacing: 1px;
}

.hint { margin: 0; font-size: 13px; color: var(--muted); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
}

.card h2 { margin: 10px 0 6px; font-size: 15px; font-weight: 600; }
.card p { margin: 0; font-size: 13px; color: var(--muted); }

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
}

footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted);
}

footer p { margin: 4px 0; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  background: #ececea;
  padding: 2px 6px;
  border-radius: 5px;
}

.meta { font-size: 12px; color: #9a9a94; }