:root {
  color-scheme: light;
  --accent: #4b5563;
  --accent-dark: #1f2937;
  --bg: #f3f4f6;
  --panel: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --line: #d1d5db;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  background: linear-gradient(180deg, #fff 0%, var(--bg) 42%, #f9fafb 100%);
  color: var(--text);
  line-height: 1.8;
}

a {
  color: var(--accent);
  font-weight: 700;
}

.page {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 64px;
}

.hero {
  padding: 52px 32px;
  border-radius: 28px;
  background: var(--accent);
  color: white;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.85;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 7vw, 4rem);
  line-height: 1.15;
}

.lead {
  max-width: 680px;
  margin: 18px 0 0;
  font-size: 1.18rem;
  font-weight: 700;
  opacity: 0.92;
}

.section {
  margin-top: 24px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
  box-shadow: 0 18px 40px rgba(17, 24, 39, 0.07);
}

h2 {
  margin: 0 0 12px;
  color: var(--accent-dark);
  font-size: 1.45rem;
  line-height: 1.35;
}

h3 {
  margin: 0 0 4px;
  color: var(--accent-dark);
}

p {
  margin: 0 0 14px;
}

ul {
  margin: 8px 0 0;
  padding-left: 1.4rem;
}

.contact {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 999px;
  background: #eef0f3;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 18px;
}

.features > div {
  padding: 18px;
  border-radius: 18px;
  background: #f8fafc;
}

.button {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 999px;
  background: var(--accent);
  color: white;
  text-decoration: none;
}

.policy h2 {
  margin-top: 26px;
}

.back {
  margin: 24px 0 0;
  text-align: center;
}

@media (max-width: 720px) {
  .page {
    padding-top: 24px;
  }

  .hero,
  .section {
    padding: 24px;
  }

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