:root {
  --color-navy: #243B55;
  --color-burgundy: #8B1E2D;
  --color-burgundy-dark: #741826;
  --color-text: #1A2A3A;
  --color-text-sub: #4D6073;
  --color-bg: #FFFFFF;
  --color-sub-bg: #F5F7FA;
  --color-border: #E5E7EB;
  --color-card-shadow: 0 10px 30px rgba(26, 42, 58, 0.06);
  --container: 1120px;
  --article: 760px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
  color: var(--color-text);
  background: #F8FAFD;
  line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
.container { width: min(calc(100% - 32px), var(--container)); margin: 0 auto; }
.section { padding: 72px 0; }
.section--tight { padding: 56px 0; }
.section-title {
  margin: 0 0 12px;
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.3;
  letter-spacing: 0.01em;
}
.section-lead {
  margin: 0 0 36px;
  color: var(--color-text-sub);
  font-size: 17px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 8px;
  font-weight: 700;
  transition: .2s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-burgundy);
  color: #fff;
}
.btn-primary:hover { background: var(--color-burgundy-dark); }
.btn-secondary {
  background: #fff;
  color: var(--color-navy);
  border-color: var(--color-border);
}
.btn-secondary:hover { background: var(--color-sub-bg); }
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  min-height: 72px;
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: 24px;
  align-items: center;
}
.site-logo img { height: 42px; width: auto; }
.global-nav ul,
.mobile-nav ul,
.footer-links ul { list-style: none; margin: 0; padding: 0; }
.global-nav ul {
  display: flex;
  justify-content: center;
  gap: 28px;
}
.global-nav a {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
}
.global-nav a:hover { color: var(--color-burgundy); }
.header-cta { font-size: 14px; }
.nav-toggle,
.mobile-nav { display: none; }
.card-grid {
  display: grid;
  gap: 22px;
}
.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  box-shadow: var(--color-card-shadow);
}
.card-body { padding: 28px; }
.site-footer {
  background: linear-gradient(180deg, #243B55 0%, #1A2A3A 100%);
  border-top: 1px solid rgba(255,255,255,.08);
  color: rgba(255,255,255,.92);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding: 64px 0 40px;
}
.footer-logo img { height: 42px; width: auto; margin-bottom: 20px; }
.footer-copy { margin: 0; color: rgba(255,255,255,.72); }
.footer-links h2 {
  margin: 0 0 16px;
  font-size: 18px;
}
.footer-links li + li { margin-top: 10px; }
.footer-links a { color: rgba(255,255,255,.78); }
.footer-links a:hover { color: #ffffff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 18px 0;
}
.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  color: rgba(255,255,255,.68);
  font-size: 14px;
}
.simple-page {
  max-width: var(--article);
  padding: 72px 0;
}
.simple-page h1 { font-size: clamp(30px, 4vw, 42px); line-height: 1.3; margin: 0 0 24px; }
.simple-page p { margin: 0 0 16px; }
.simple-page ul { padding-left: 1.2em; }
@media (max-width: 980px) {
  .header-inner {
    grid-template-columns: auto 1fr auto;
  }
  .global-nav,
  .header-cta-wrap { display: none; }
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border: 1px solid var(--color-border);
    background: #fff;
    border-radius: 8px;
    color: var(--color-text);
    cursor: pointer;
    font-size: 20px;
  }
  .mobile-nav {
    display: none;
    border-top: 1px solid var(--color-border);
    background: #fff;
  }
  .mobile-nav.is-open { display: block; }
  .mobile-nav ul { padding: 12px 16px 18px; }
  .mobile-nav li + li { margin-top: 10px; }
  .mobile-nav a {
    display: block;
    padding: 12px 10px;
    border-radius: 8px;
    background: var(--color-sub-bg);
    font-weight: 700;
  }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 640px) {
  .section { padding: 56px 0; }
  .footer-bottom-inner { flex-direction: column; align-items: flex-start; }
}