:root {
  --ink: #1c2a3a;
  --muted: #5b6b7c;
  --bg: #f4f8fc;
  --bg-2: #ffffff;
  --line: #d7e2ee;
  --accent: #2b7de9;
  --accent-2: #155dcc;
  --navy: #12335c;
  --danger: #c04545;
  --ok: #2f8a56;
  --display: "Outfit", "IBM Plex Sans JP", sans-serif;
  --sans: "IBM Plex Sans JP", "Hiragino Sans", sans-serif;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 480px at 8% -12%, rgba(43, 125, 233, 0.16), transparent 58%),
    radial-gradient(700px 420px at 100% 0%, rgba(18, 51, 92, 0.08), transparent 50%);
  z-index: 0;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { color: var(--navy); }

.gc-skip {
  position: absolute;
  left: -999px;
  top: 0;
}

.gc-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.gc-header__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0.95rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.gc-logo {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  color: var(--navy);
}

.gc-logo__mark {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--accent);
  transform: translateY(-1px);
}

.gc-logo__name {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.14em;
}

.gc-logo__sub {
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.gc-nav {
  margin-left: auto;
  display: flex;
  gap: 1.25rem;
}

.gc-nav a {
  color: var(--muted);
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  font-weight: 500;
}

.gc-nav a:hover { color: var(--navy); }

.gc-header__cta {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  background: var(--accent);
  color: #fff;
  padding: 0.48rem 0.95rem;
  border-radius: 8px;
}

.gc-header__cta:hover { background: var(--accent-2); color: #fff; }

.gc-main { position: relative; z-index: 1; }

.gc-hero,
.gc-section,
.gc-cta,
.gc-page {
  max-width: 1120px;
  margin: 0 auto;
  padding: 4.4rem 1.25rem;
}

.gc-kicker {
  margin: 0 0 1rem;
  color: var(--accent-2);
  font-family: var(--display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.gc-hero__title {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  line-height: 1.28;
  margin: 0 0 1.4rem;
  color: var(--navy);
}

.gc-hero__lead,
.gc-page__lead {
  max-width: 40rem;
  color: var(--muted);
  margin: 0 0 2rem;
}

.gc-hero__actions { display: flex; flex-wrap: wrap; gap: 0.8rem; }

.gc-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  padding: 0.5rem 1.25rem;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 600;
}

.gc-btn--solid {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
}

.gc-btn--solid:hover { background: var(--accent-2); color: #fff; }

.gc-btn--ghost {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--navy);
}

.gc-btn--ghost:hover { border-color: var(--accent); color: var(--accent-2); }

.gc-stats {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.25rem 1rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.gc-stats > div {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.15rem 1.2rem;
}

.gc-stats__label {
  margin: 0 0 0.25rem;
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.gc-stats__value {
  margin: 0;
  color: var(--navy);
  font-family: var(--display);
  font-size: 1.2rem;
  font-weight: 600;
}

.gc-section__head h2,
.gc-cta h2,
.gc-page__title {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.55rem, 3vw, 2.1rem);
  margin: 0 0 1.5rem;
  color: var(--navy);
}

.gc-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.gc-card {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.5rem 1.35rem 1.4rem;
  min-height: 14rem;
  box-shadow: 0 10px 30px rgba(18, 51, 92, 0.05);
}

.gc-card__no {
  margin: 0 0 0.8rem;
  color: var(--accent);
  letter-spacing: 0.16em;
  font-size: 0.75rem;
  font-weight: 700;
}

.gc-card h3 {
  font-family: var(--display);
  margin: 0 0 0.7rem;
  font-size: 1.2rem;
  color: var(--navy);
}

.gc-card p { color: var(--muted); margin: 0 0 1.2rem; }

.gc-card a { font-size: 0.85rem; font-weight: 600; }

.gc-values {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}

.gc-values li {
  display: grid;
  grid-template-columns: 6rem 1fr;
  gap: 1rem;
  padding: 1.15rem 0;
  border-top: 1px solid var(--line);
}

.gc-values strong {
  font-family: var(--display);
  font-size: 1.1rem;
  color: var(--navy);
}

.gc-values span { color: var(--muted); }

.gc-cta {
  text-align: center;
  padding-bottom: 5.2rem;
}

.gc-cta p { color: var(--muted); }

.gc-footer {
  position: relative;
  z-index: 1;
  background: #fff;
  border-top: 1px solid var(--line);
  padding: 2.5rem 1.25rem 2rem;
}

.gc-footer__inner {
  max-width: 1120px;
  margin: 0 auto 1.5rem;
  display: flex;
  justify-content: space-between;
  gap: 2rem;
}

.gc-footer__brand {
  font-family: var(--display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  margin: 0 0 0.4rem;
  color: var(--navy);
}

.gc-footer__lead { color: var(--muted); margin: 0; max-width: 24rem; }

.gc-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.4rem;
  align-content: flex-start;
}

.gc-footer__nav a { color: var(--muted); font-size: 0.85rem; }

.gc-footer__copy {
  max-width: 1120px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 0.78rem;
}

.gc-prose { color: var(--ink); max-width: 42rem; }
.gc-prose p { color: var(--muted); }
.gc-prose h2 {
  font-family: var(--display);
  margin: 2rem 0 0.8rem;
  color: var(--navy);
}

.gc-form {
  display: grid;
  gap: 1rem;
  max-width: 32rem;
}

.gc-form label { display: grid; gap: 0.35rem; color: var(--muted); font-size: 0.85rem; }

.gc-form input,
.gc-form textarea {
  width: 100%;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 0.7rem 0.8rem;
  border-radius: 8px;
  font: inherit;
  font-size: 16px;
}

.gc-form button { justify-self: start; margin-top: 0.4rem; }

.gc-flash { padding: 0.8rem 1rem; border: 1px solid var(--line); background: #fff; border-radius: 8px; }
.gc-flash--ok { color: var(--ok); }
.gc-flash--err { color: var(--danger); }

@media (max-width: 860px) {
  .gc-header__inner { flex-wrap: wrap; }
  .gc-nav { order: 3; width: 100%; margin: 0; }
  .gc-cards,
  .gc-stats { grid-template-columns: 1fr; }
  .gc-values li { grid-template-columns: 1fr; gap: 0.3rem; }
  .gc-footer__inner { flex-direction: column; }
}