:root {
  --brand: #004953;
  --brand-deep: #003740;
  --brand-soft: #e7f1f2;
  --accent: #d7b66a;
  --text: #173036;
  --muted: #607277;
  --line: #d8e2e4;
  --white: #ffffff;
  --background: #f8fbfb;
  --shadow: 0 16px 40px rgba(0, 73, 83, 0.10);
  --radius: 20px;
  --max-width: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.02em;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
.container { width: min(var(--max-width), calc(100% - 40px)); margin-inline: auto; }

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  color: var(--white);
  background: var(--brand);
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: 0 6px 20px rgba(0, 55, 64, 0.16);
}
.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-decoration: none;
  white-space: nowrap;
}
.brand img {
  width: 58px;
  height: 44px;
  padding: 4px;
  object-fit: contain;
  background: var(--white);
  border-radius: 11px;
}
.nav {
  display: flex;
  justify-content: flex-end;
  gap: 21px;
  flex-wrap: wrap;
}
.nav a {
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.9rem;
  text-decoration: none;
}
.nav a:hover,
.nav a[aria-current="page"] { color: var(--white); text-decoration: underline; text-underline-offset: 5px; }

.hero {
  padding: 82px 0 86px;
  background:
    radial-gradient(circle at 87% 22%, rgba(0, 73, 83, 0.15), transparent 28%),
    linear-gradient(180deg, var(--white) 0%, #f3f8f8 100%);
  border-bottom: 1px solid var(--line);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: 64px;
  align-items: center;
}
.kicker,
.section-head small {
  display: block;
  margin: 0 0 0.55rem;
  color: var(--brand);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}
.hero-name {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin: 0.35rem 0 0.75rem;
}
.hero-name h1,
.section-head h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.35rem);
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.hero-name .kana {
  margin: 0;
  font-size: 1rem;
  line-height: 1.4;
  letter-spacing: 0.08em;
  white-space: nowrap;
  color: var(--muted);
}
.hero-role {
  margin: 0 0 1.15rem;
  color: var(--brand);
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.75;
}
.hero-role a { text-underline-offset: 4px; }
.hero-message { margin: 0; color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 27px; }
.btn,
.link-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.18s ease, background-color 0.18s ease, color 0.18s ease;
}
.btn { min-height: 48px; padding: 10px 22px; border: 1px solid var(--brand); border-radius: 999px; }
.btn:hover,
.link-btn:hover { transform: translateY(-2px); }
.btn.primary { color: var(--white); background: var(--brand); }
.btn.primary:hover { background: var(--brand-deep); }
.btn.secondary { color: var(--brand); background: transparent; }
.btn.secondary:hover { background: var(--brand-soft); }
.link-btn { margin-top: 12px; color: var(--brand); text-decoration: underline; text-underline-offset: 5px; }
.logo-box {
  padding: 34px;
  text-align: center;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.logo-box img { width: min(240px, 80%); margin: 0 auto 20px; }
.logo-box strong { display: block; color: var(--brand); font-size: 1.35rem; }
.logo-box p { margin: 6px 0 0; color: var(--muted); }

.section { padding: 82px 0; }
.section.alt { background: var(--background); }
.section.dark { color: var(--white); background: var(--brand); }
.section.dark .section-head small,
.section.dark .link-btn { color: #bfe3e6; }
.section.dark .card { color: var(--text); background: var(--white); }
.section-head { margin-bottom: 30px; }
.grid-2 { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 64px; align-items: start; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.feature-list { display: grid; gap: 17px; }
.feature {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 15px;
  align-items: start;
  padding: 19px;
  background: var(--background);
  border: 1px solid var(--line);
  border-radius: 15px;
}
.circle {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--brand);
  border-radius: 50%;
  font-size: 1.25rem;
}
.card {
  padding: 26px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 8px; font-size: 1.12rem; line-height: 1.5; }
.card p { margin: 0; color: var(--muted); }
.icon { margin-bottom: 14px; font-size: 1.8rem; }

.footer {
  padding: 34px 0;
  color: rgba(255, 255, 255, 0.82);
  background: var(--brand-deep);
  font-size: 0.9rem;
  text-align: center;
}

@media (max-width: 900px) {
  .header-inner { align-items: flex-start; flex-direction: column; padding: 15px 0; gap: 12px; }
  .nav { justify-content: flex-start; gap: 12px 18px; }
  .hero-grid,
  .grid-2 { grid-template-columns: 1fr; gap: 38px; }
  .grid-3 { grid-template-columns: 1fr; }
  .logo-box { max-width: 520px; }
}

@media (max-width: 640px) {
  .container { width: min(100% - 28px, var(--max-width)); }
  .hero { padding: 58px 0 62px; }
  .section { padding: 58px 0; }
  .hero-name { gap: 0.55rem; }
  .hero-name h1,
  .section-head h2 { font-size: 1.8rem; }
  .hero-name .kana { font-size: 0.9rem; }
  .hero-message br { display: none; }
  .btn { width: 100%; }
  .logo-box { padding: 26px 20px; }
  .nav { font-size: 0.85rem; }
}