:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-muted: #edf3f8;
  --text: #1f2937;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --border: #dbe3ef;
  --shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Sans", "Yu Gothic", "YuGothic", Meiryo, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

.container {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 55%, #2563eb 100%);
  color: #ffffff;
  padding: 56px 0 44px;
}

.header-inner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
}

.eyebrow {
  margin: 0 0 10px;
  color: #bfdbfe;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.lead {
  margin: 16px 0 0;
  max-width: 680px;
  color: #dbeafe;
  font-size: 1.08rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 8px 16px;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 999px;
  color: #ffffff;
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(8px);
  font-weight: 700;
}

.nav a:hover {
  background: rgba(255,255,255,0.18);
  text-decoration: none;
}

.section {
  padding: 64px 0;
}

.hero {
  padding-top: 40px;
  padding-bottom: 24px;
}

.section-muted {
  background: var(--surface-muted);
}

h2 {
  margin: 0 0 24px;
  font-size: clamp(1.65rem, 4vw, 2.4rem);
  letter-spacing: -0.03em;
}

h3 {
  margin: 0 0 14px;
  font-size: 1.25rem;
}

p {
  margin: 0 0 16px;
}

ul {
  margin: 0;
  padding-left: 1.2em;
}

li + li {
  margin-top: 8px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.updated {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 0;
}

dl {
  margin: 0;
}

dt {
  font-weight: 800;
  margin-top: 16px;
}

dt:first-child {
  margin-top: 0;
}

dd {
  margin: 4px 0 0;
  color: var(--muted);
}

.policy h3 {
  margin-top: 32px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
}

.policy h3:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.contact a {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 10px 18px;
  border-radius: 999px;
  color: #ffffff;
  background: var(--primary);
  font-weight: 800;
}

.contact a:hover {
  background: var(--primary-dark);
  text-decoration: none;
}

.site-footer {
  padding: 28px 0;
  color: #cbd5e1;
  background: #0f172a;
  text-align: center;
}

.site-footer p {
  margin: 0;
  font-size: 0.95rem;
}

@media (max-width: 760px) {
  .site-header {
    padding: 42px 0 34px;
  }

  .header-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    justify-content: flex-start;
  }

  .section {
    padding: 44px 0;
  }

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

  .card {
    padding: 22px;
  }
}