:root {
  color-scheme: light;
  --ink: #192d46;
  --muted: #4c5d70;
  --blue: #175bb5;
  --border: #dde4ed;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.9;
  overflow-wrap: anywhere;
}
a { color: var(--blue); text-underline-offset: .25em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 3px solid var(--blue); outline-offset: 5px; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { line-height: 1.5; }
.container { width: min(100% - 48px, 1040px); margin-inline: auto; }
.site-header { border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-block: 24px; }
.brand { color: var(--ink); font-size: 1.4rem; font-weight: 700; letter-spacing: .02em; text-decoration: none; }
.nav-list { display: flex; flex-wrap: wrap; gap: 12px 28px; list-style: none; margin: 0; padding: 0; font-size: .875rem; }
.nav-list a { display: inline-block; padding-block: 6px; color: var(--ink); text-decoration: none; }
.nav-list a:hover, .nav-list a[aria-current="page"] { text-decoration: underline; }
.hero { padding-block: 100px 96px; }
.hero h1 { font-size: clamp(1.8rem, 3.6vw, 2.75rem); letter-spacing: .02em; }
.hero p { max-width: 48rem; margin-top: 24px; color: var(--muted); }
.button { display: inline-block; margin-top: 32px; padding: 12px 24px; background: var(--blue); border: 1px solid var(--blue); border-radius: 5px; color: #fff; text-decoration: none; font-weight: 600; }
.button:hover { background: #124a94; text-decoration: underline; }
.section { scroll-margin-top: 32px; }
.section h2 { margin-bottom: 28px; font-size: 1.5rem; }
.service-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.service-card { display: flex; flex-direction: column; align-items: flex-start; min-width: 0; border: 1px solid var(--border); border-radius: 8px; padding: 32px; }
.service-card h3 { font-size: 1.4rem; }
.service-card p { margin-block: 16px 28px; color: var(--muted); }
.service-card > a { margin-top: auto; padding-block: 6px; font-weight: 600; }
.about { margin-block: 80px 88px; padding-top: 48px; border-top: 1px solid var(--border); }
.about p { color: var(--muted); }
.about p + p { margin-top: 12px; }
.site-footer { border-top: 1px solid var(--border); padding-block: 32px; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.footer-inner > a:last-child { padding-block: 6px; font-size: .875rem; }
.copyright { margin-top: 24px; color: var(--muted); }
.copyright small { font-size: .75rem; }
.policy { max-width: 800px; padding-block: 64px 80px; }
.policy h1 { margin-bottom: 32px; font-size: clamp(1.65rem, 4vw, 2rem); }
.policy section { margin-top: 40px; }
.policy h2 { margin-bottom: 16px; font-size: 1.25rem; }
.policy p { color: var(--muted); }
.policy p + p { margin-top: 16px; }
.policy .policy-date { margin-top: 40px; }
.skip-link { position: absolute; top: 12px; left: 12px; z-index: 1; padding: 8px 16px; background: #fff; transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
@media (max-width: 700px) {
  .header-inner { align-items: flex-start; flex-direction: column; gap: 12px; padding-block: 20px; }
  .nav-list { gap: 4px 20px; }
  .hero { padding-block: 64px; }
  .service-grid { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .service-card { padding: 24px; }
  .about { margin-block: 56px 64px; padding-top: 32px; }
  .footer-inner { align-items: flex-start; flex-direction: column; gap: 12px; }
  .policy { padding-block: 40px 56px; }
}