:root {
  --navy: #081a3a;
  --navy-2: #112a56;
  --gold: #d4af37;
  --gold-soft: #e7d08a;
  --text: #1d2430;
  --muted: #677286;
  --bg: #f4f6fb;
  --white: #ffffff;
  --shadow: 0 18px 40px rgba(5, 19, 46, 0.16);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(8, 26, 58, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(212, 175, 55, 0.22);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 82px; gap: 20px;
}
.brand { display: flex; align-items: center; gap: 14px; color: var(--white); }
.brand-logo {
  width: 58px; height: 58px; object-fit: cover;
  border-radius: 50%; border: 2px solid rgba(212, 175, 55, 0.35);
  background: #fff;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 1.35rem; }
.brand-sub { font-size: 0.8rem; color: var(--gold-soft); }
.site-nav { display: flex; gap: 26px; color: var(--white); }
.site-nav a { opacity: 0.88; }
.site-nav a:hover { color: var(--gold-soft); opacity: 1; }
.menu-toggle {
  display: none; border: 1px solid rgba(255,255,255,0.18); background: transparent;
  color: #fff; font-size: 1.4rem; padding: 8px 12px; border-radius: 10px;
}
.hero {
  position: relative; min-height: calc(100vh - 82px); overflow: hidden;
  display: flex; align-items: center;
  background: #0d2247;
}
.hero-bg {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
}
.hero-overlay {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(4,13,30,0.82) 0%, rgba(4,13,30,0.56) 42%, rgba(4,13,30,0.18) 100%),
    linear-gradient(180deg, rgba(8,26,58,0.24), rgba(8,26,58,0.56));
}
.hero-content { position: relative; z-index: 2; color: var(--white); padding: 90px 0; }
.eyebrow, .section-kicker {
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--gold); font-size: 0.82rem; font-weight: 700;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 4.6rem);
  line-height: 1.12; margin: 14px 0 18px;
  text-shadow: 0 8px 24px rgba(0,0,0,0.25);
}
.hero-lead {
  font-size: clamp(1rem, 2vw, 1.28rem);
  max-width: 620px; margin-bottom: 30px; color: rgba(255,255,255,0.92);
}
.hero-actions, .cta-box { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 24px; min-height: 50px; border-radius: 999px;
  font-weight: 700; transition: .25s ease; border: 1px solid transparent;
}
.btn-primary { background: var(--gold); color: #1e1a10; }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 24px rgba(212, 175, 55, 0.24); }
.btn-secondary { border-color: rgba(255,255,255,0.36); color: #fff; background: rgba(255,255,255,0.05); }
.btn-secondary:hover { background: rgba(255,255,255,0.12); }
.section { padding: 88px 0; }
.two-column {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 42px; align-items: center;
}
.mission h2, .members h2, .projects h2, .logos h2, .cta h2 { font-size: clamp(1.8rem, 4vw, 3rem); margin: 8px 0 18px; line-height: 1.2; }
.mission-card, .feature-photo-card, .logo-card, .project-card, .card, .cta-box {
  background: var(--white); border-radius: 24px; box-shadow: var(--shadow);
}
.mission-card { padding: 28px; border: 1px solid rgba(17,42,86,0.08); }
.feature-photo-card { overflow: hidden; margin: 26px 0 22px; }
.feature-photo-card img { width: 100%; height: auto; }
.grid { display: grid; gap: 22px; }
.three-cards { grid-template-columns: repeat(3, 1fr); }
.card { padding: 26px; }
.card h3 { margin-top: 0; margin-bottom: 10px; color: var(--navy); }
.projects { background: linear-gradient(180deg, #eef3fb 0%, #f6f8fc 100%); }
.project-grid { grid-template-columns: repeat(2, 1fr); margin-top: 26px; }
.project-card { overflow: hidden; }
.project-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.project-body { padding: 22px 24px 26px; }
.logo-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 26px; }
.logo-card { padding: 24px; text-align: center; }
.logo-card img { max-height: 360px; object-fit: contain; margin: 0 auto 10px; }
.cta-box {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #fff; padding: 34px; justify-content: space-between;
}
.site-footer {
  background: #07162f; color: rgba(255,255,255,0.86);
  padding: 48px 0 56px; border-top: 1px solid rgba(212,175,55,0.16);
}
.footer-grid { display: grid; grid-template-columns: 1.1fr 1fr 1fr; gap: 26px; }
.footer-grid h3, .footer-grid h4 { color: var(--gold-soft); margin-top: 0; }

@media (max-width: 920px) {
  .site-nav {
    display: none; position: absolute; right: 16px; top: 76px; width: min(260px, calc(100% - 32px));
    background: rgba(8, 26, 58, 0.98); padding: 16px; border-radius: 18px; flex-direction: column;
    box-shadow: var(--shadow);
  }
  .site-nav.open { display: flex; }
  .menu-toggle { display: inline-flex; }
  .two-column, .three-cards, .project-grid, .logo-grid, .footer-grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
}

@media (max-width: 560px) {
  .section { padding: 68px 0; }
  .header-inner { min-height: 74px; }
  .brand-logo { width: 50px; height: 50px; }
  .cta-box { padding: 26px; }
}