:root {
  --bg: #f7fbff;
  --surface: #ffffff;
  --text: #172033;
  --muted: #657086;
  --line: #dfe8f2;
  --accent: #1f6feb;
  --accent-dark: #1557b0;
  --max: 980px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
}
.container { width: min(calc(100% - 32px), var(--max)); margin: 0 auto; }
.hero { padding: 72px 0 48px; }
.badge { display: inline-block; padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); font-size: 14px; }
h1 { font-size: clamp(34px, 7vw, 62px); line-height: 1.15; margin: 20px 0; letter-spacing: -0.03em; }
h2 { font-size: clamp(26px, 5vw, 38px); line-height: 1.3; margin: 0 0 18px; }
p { margin: 0 0 16px; }
.lead { font-size: clamp(18px, 3vw, 23px); color: var(--muted); max-width: 760px; }
.cta { display: inline-flex; align-items: center; justify-content: center; margin-top: 26px; padding: 16px 26px; border-radius: 12px; background: var(--accent); color: white; text-decoration: none; font-weight: 700; }
.cta:hover { background: var(--accent-dark); }
.section { padding: 56px 0; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 26px; box-shadow: 0 10px 30px rgba(23,32,51,.04); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.small { font-size: 14px; color: var(--muted); }
.footer { padding: 36px 0 56px; color: var(--muted); font-size: 13px; }
@media (max-width: 760px) {
  .hero { padding-top: 48px; }
  .grid { grid-template-columns: 1fr; }
  .cta { width: 100%; }
}