:root {
  --ink: #20282e;
  --muted: #68747b;
  --line: #dce2e4;
  --wash: #f4f7f7;
  --accent: #246a72;
  --max-width: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Yu Gothic UI", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.85;
  overflow-wrap: break-word;
}
a { color: inherit; }
a:focus-visible { outline: 3px solid #75b8bf; outline-offset: 4px; }
.container { width: min(calc(100% - 48px), var(--max-width)); margin: 0 auto; }
.content-narrow { max-width: 760px; margin: 0 auto; }

.site-header { border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .96); }
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { color: var(--ink); font-size: 19px; font-weight: 700; letter-spacing: .02em; text-decoration: none; white-space: nowrap; }
.nav-list { display: flex; gap: 24px; margin: 0; padding: 0; list-style: none; }
.nav-list a { color: #4e5b62; font-size: 14px; text-decoration: none; }
.nav-list a:hover, .nav-list a[aria-current="page"] { color: var(--accent); }

.hero { padding: clamp(86px, 13vw, 160px) 0 clamp(84px, 12vw, 144px); border-bottom: 1px solid var(--line); }
.hero .container { max-width: 920px; }
.eyebrow, .section-label { margin: 0 0 16px; color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: .12em; line-height: 1.4; text-transform: uppercase; }
h1, h2, h3 { margin: 0; font-weight: 700; line-height: 1.35; letter-spacing: .01em; }
.hero h1 { max-width: 760px; font-size: clamp(34px, 5.1vw, 58px); }
.hero-lead { max-width: 670px; margin: 30px 0 0; color: #46545b; font-size: clamp(16px, 2vw, 18px); }

.section { padding: clamp(72px, 9vw, 112px) 0; }
.section h2 { margin-bottom: 30px; font-size: clamp(28px, 3.5vw, 38px); }
.section p { margin: 0 0 20px; }
.section p:last-child { margin-bottom: 0; }
.section-tinted { background: var(--wash); }
.section-heading { margin-bottom: 38px; }
.section-heading h2 { margin-bottom: 0; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.feature { padding: 30px 28px 8px 0; }
.feature + .feature { border-left: 1px solid var(--line); padding-left: 28px; }
.feature-number { display: block; margin-bottom: 22px; color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: .08em; }
.feature h3 { margin-bottom: 12px; font-size: 19px; }
.feature p { color: #536168; font-size: 15px; }
.notice { border-left: 3px solid var(--accent); padding: 24px 28px; background: var(--wash); }
.notice-label { margin-bottom: 8px !important; color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.contact-section { border-top: 1px solid var(--line); }
.email-link { display: inline-block; margin-top: 14px; color: var(--accent); font-size: clamp(20px, 3vw, 25px); font-weight: 700; text-underline-offset: 5px; }
.email-link:hover { color: #174b51; }

.site-footer { border-top: 1px solid var(--line); }
.footer-inner { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 24px; color: var(--muted); font-size: 13px; }
.footer-inner p { margin: 0; }
.footer-inner a { text-underline-offset: 4px; }

.policy-main { padding: clamp(68px, 9vw, 112px) 0; }
.policy-content { max-width: 760px; }
.policy-content > h1 { margin-bottom: 28px; font-size: clamp(32px, 4vw, 44px); }
.policy-intro { margin: 0 0 54px; color: #536168; }
.policy-content section { padding: 26px 0; border-top: 1px solid var(--line); }
.policy-content section:last-child { border-bottom: 1px solid var(--line); }
.policy-content h2 { margin-bottom: 12px; font-size: 19px; }
.policy-content p { margin: 0; }
.policy-content section a { color: var(--accent); text-underline-offset: 4px; }

@media (max-width: 640px) {
  .container { width: min(calc(100% - 32px), var(--max-width)); }
  .header-inner { min-height: auto; padding: 18px 0; display: block; }
  .nav-list { gap: 17px; margin-top: 12px; overflow-x: auto; padding-bottom: 2px; }
  .nav-list a { font-size: 13px; white-space: nowrap; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature { padding: 27px 0; }
  .feature + .feature { border-top: 1px solid var(--line); border-left: 0; padding-left: 0; }
  .footer-inner { min-height: auto; padding: 24px 0; display: block; }
  .footer-inner a { display: inline-block; margin-top: 6px; }
  .notice { padding: 20px; }
}