:root {
  --primary: #0F766E;
  --accent: #0284C7;
  --heading: #0F172A;
  --text: #334155;
  --subtext: #64748B;
  --bg: #FFFFFF;
  --soft: #F8FAFC;
  --border: #E2E8F0;
  --primary-soft: #ECFDF5;
  --accent-soft: #F0F9FF;
  --radius: 16px;
  --shadow: 0 12px 32px rgba(15, 23, 42, 0.07);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: Inter, "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255,255,255,.94);
  border-bottom: 1px solid rgba(226,232,240,.9);
  backdrop-filter: blur(14px);
}
.header-inner {
  max-width: 1160px;
  height: 72px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo img { width: 132px; }
.header-nav { display: flex; gap: 28px; align-items: center; font-size: 14px; font-weight: 600; }
.header-nav a { color: var(--subtext); transition: color .2s ease; }
.header-nav a:hover, .header-nav a.is-current { color: var(--primary); }

.hero {
  padding: 84px 24px 72px;
  background: linear-gradient(180deg, #F7FFFD 0%, #FFFFFF 100%);
  border-bottom: 1px solid var(--border);
}
.hero-inner { max-width: 980px; margin: 0 auto; text-align: center; }
.eyebrow, .section-kicker {
  display: inline-block;
  color: var(--primary);
  font-size: 12px;
  line-height: 1;
  font-weight: 700;
  letter-spacing: .14em;
}
.hero h1 {
  margin: 18px 0 20px;
  color: var(--heading);
  font-size: clamp(36px, 5vw, 54px);
  line-height: 1.2;
  letter-spacing: -.03em;
}
.lead { max-width: 740px; margin: 0 auto; color: var(--subtext); font-size: 17px; }

.page-shell { max-width: 1120px; margin: 0 auto; padding: 72px 24px 96px; }
.section { margin-top: 88px; }
.section-heading { max-width: 720px; margin-bottom: 32px; }
.section-heading.compact { margin-bottom: 22px; }
.section-heading h2, .contact-card h2, .security-note h2 {
  margin: 12px 0 10px;
  color: var(--heading);
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.35;
  letter-spacing: -.02em;
}
.section-heading p, .contact-card p, .security-note p { margin: 0; color: var(--subtext); }

.contact-card {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 36px;
  align-items: center;
  padding: 36px;
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
}
.contact-box {
  padding: 24px;
  background: var(--soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.contact-label { display: block; margin-bottom: 8px; color: var(--subtext); font-size: 13px; font-weight: 600; }
.contact-box strong { display: block; color: var(--heading); font-size: 16px; overflow-wrap: anywhere; }
.contact-box p { margin-top: 8px; font-size: 13px; }

.topic-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.topic-card {
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
}
.topic-card .icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  border-radius: 12px;
  color: var(--primary);
  background: var(--primary-soft);
  font-size: 15px;
  font-weight: 700;
}
.topic-card h3 { margin: 0 0 12px; color: var(--heading); font-size: 18px; line-height: 1.45; }
.topic-card p { margin: 0; color: var(--subtext); font-size: 14px; }
.topic-card p + p { margin-top: 10px; }
.topic-card strong { color: var(--text); }

.info-panel {
  padding: 28px 32px;
  border-radius: var(--radius);
  background: var(--soft);
  border: 1px solid var(--border);
}
.info-panel ul { margin: 0; padding-left: 1.3em; display: grid; gap: 8px; }

.security-note {
  margin-top: 64px;
  padding: 30px 32px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
  align-items: start;
  border: 1px solid #BAE6FD;
  border-radius: var(--radius);
  background: var(--accent-soft);
}
.security-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #fff;
  color: var(--accent);
  font-weight: 700;
  border: 1px solid #BAE6FD;
}
.security-note h2 { margin-top: 2px; font-size: 22px; }
.security-note p + p { margin-top: 8px; }

.link-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.policy-link {
  min-height: 76px;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border: 1px solid var(--border);
  border-radius: 14px;
  color: var(--heading);
  font-weight: 600;
  transition: border-color .2s ease, transform .2s ease;
}
.policy-link:hover { border-color: #99D5CF; transform: translateY(-2px); }

.site-footer { background: #0B1F2A; color: #D7E3E8; }
.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 48px 24px 34px;
  display: flex;
  justify-content: space-between;
  gap: 36px;
}
.footer-brand img { width: 128px; filter: brightness(0) invert(1); opacity: .96; }
.footer-brand p { margin: 14px 0 0; color: #A9BDC5; font-size: 13px; }
.footer-links { max-width: 620px; display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 14px 24px; font-size: 13px; }
.footer-links a { color: #C5D4DA; }
.footer-links a:hover { color: #fff; }
.copyright { max-width: 1160px; margin: 0 auto; padding: 18px 24px 24px; border-top: 1px solid rgba(255,255,255,.09); color: #8298A1; font-size: 12px; }

@media (max-width: 860px) {
  .header-nav { gap: 16px; }
  .contact-card { grid-template-columns: 1fr; }
  .topic-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .link-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .header-inner { height: 64px; padding: 0 18px; }
  .logo img { width: 116px; }
  .header-nav a:not(.is-current) { display: none; }
  .hero { padding: 64px 20px 56px; }
  .page-shell { padding: 52px 20px 72px; }
  .section { margin-top: 64px; }
  .contact-card { padding: 26px 22px; }
  .topic-grid { grid-template-columns: 1fr; }
  .security-note { grid-template-columns: 1fr; padding: 24px; }
  .footer-inner { flex-direction: column; }
  .footer-links { justify-content: flex-start; }
}