:root {
  color-scheme: light;
  --blue: #2563eb;
  --blue-deep: #173f8f;
  --blue-soft: #eaf2ff;
  --ink: #172033;
  --text: #3f4c63;
  --muted: #66748c;
  --line: #dbe4f0;
  --surface: #ffffff;
  --background: #f6f9fd;
  --radius: 18px;
  --shadow: 0 18px 45px rgba(31, 64, 112, 0.09);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--surface);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue-deep); text-underline-offset: 0.2em; }
a:hover { color: var(--blue); }
a:focus-visible { outline: 3px solid #fbbf24; outline-offset: 4px; border-radius: 4px; }

.shell { width: min(100% - 40px, 1120px); margin-inline: auto; }
.narrow { width: min(100% - 40px, 920px); }

.site-header {
  border-bottom: 1px solid rgba(219, 228, 240, 0.9);
  background: rgba(255, 255, 255, 0.96);
}

.header-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  color: var(--blue-deep);
  font-size: 1.45rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.header-label { color: var(--muted); font-size: 0.82rem; font-weight: 700; }

.hero {
  padding: 84px 0 78px;
  background:
    radial-gradient(circle at 85% 20%, rgba(37, 99, 235, 0.14), transparent 32%),
    linear-gradient(145deg, #f8fbff 0%, #eef5ff 100%);
  border-bottom: 1px solid var(--line);
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 0.77rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

h1, h2, h3 { color: var(--ink); line-height: 1.3; }
h1 { margin: 0; font-size: clamp(2.2rem, 8vw, 4.25rem); letter-spacing: -0.035em; }
h2 { margin: 0 0 24px; font-size: clamp(1.65rem, 4vw, 2.25rem); }
h3 { margin: 10px 0 8px; font-size: 1.12rem; }

.lead {
  max-width: 760px;
  margin: 26px 0 0;
  color: #33445f;
  font-size: clamp(1.05rem, 2.5vw, 1.22rem);
}

.notice {
  margin-top: 32px;
  padding: 18px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  border: 1px solid #bfd3f5;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: var(--shadow);
}

.notice strong { color: var(--blue-deep); }

.section { padding: 72px 0; }
.section-tint { background: var(--background); border-block: 1px solid var(--line); }
.section p { max-width: 780px; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.card p { margin: 0; }
.card-number { color: var(--blue); font-size: 0.8rem; font-weight: 800; letter-spacing: 0.1em; }

.primary-link {
  margin-top: 24px;
  padding: 14px 18px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  border-radius: 12px;
  background: var(--blue-deep);
  color: white;
  font-weight: 750;
  text-decoration: none;
}

.primary-link:hover { background: var(--blue); color: white; }

.policy-main { padding: 72px 0; background: var(--background); }
.policy { width: min(100% - 40px, 840px); }
.policy > h1 { margin-bottom: 18px; font-size: clamp(2rem, 7vw, 3.5rem); }
.policy-lead { margin-bottom: 44px; }

.policy section {
  margin-top: 18px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.policy section h2 { margin-bottom: 14px; font-size: 1.22rem; }
.policy section p, .policy section ul { margin-block: 0; }
.policy section ul { padding-left: 1.35em; }
.policy section li + li { margin-top: 5px; }
.policy address { font-style: normal; }
.policy-date { margin: 32px 0 20px; color: var(--muted); font-size: 0.92rem; }
.back-link { font-weight: 750; }

.site-footer { padding: 34px 0; background: #121d30; color: #d9e2f0; }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; }
.site-footer strong { color: white; }
.site-footer p { margin: 2px 0 0; font-size: 0.86rem; }
.footer-links { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 22px; }
.footer-links a { color: white; }
.mobile-break { display: none; }

@media (max-width: 680px) {
  .shell, .narrow, .policy { width: min(100% - 30px, 920px); }
  .hero { padding: 60px 0 56px; }
  .section, .policy-main { padding: 52px 0; }
  .card-grid { grid-template-columns: 1fr; }
  .card, .policy section { padding: 22px 20px; }
  .footer-inner { flex-direction: column; }
  .footer-links { flex-direction: column; align-items: flex-start; gap: 8px; }
  .mobile-break { display: initial; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}