:root {
  --bg: #0b1020;
  --panel: #111831;
  --text: #e6eaf2;
  --muted: #a8b3c8;
  --accent: #6ea8fe;
  --accent-2: #78e3d1;
  --line: #25304f;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(circle at 20% 10%, #182447 0%, var(--bg) 45%);
  color: var(--text);
  line-height: 1.6;
}
.container { width: min(1100px, 92%); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(8px);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav-wrap { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 10px 0; }
.brand { display: flex; align-items: center; gap: 10px; }
.logo {
  display: inline-grid; place-items: center;
  width: 40px; height: 40px; border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #041024; font-weight: 700;
}
.brand-ja { margin: 0; font-weight: 700; }
.brand-en { margin: 0; font-size: 12px; color: var(--muted); }
nav a { color: var(--muted); text-decoration: none; margin-left: 14px; font-size: 14px; }
nav a:hover { color: var(--text); }
.hero { padding: 72px 0 40px; }
.hero-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 24px; }
.kicker { color: var(--accent-2); margin: 0 0 12px; font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; }
h1 { margin: 0 0 14px; line-height: 1.25; font-size: clamp(28px, 4vw, 44px); }
.lead { color: var(--muted); max-width: 60ch; }
.hero-actions { display: flex; gap: 10px; margin-top: 20px; }
.btn {
  display: inline-block; padding: 10px 14px; border-radius: 10px;
  border: 1px solid var(--line); color: var(--text); text-decoration: none;
}
.btn.primary { background: linear-gradient(135deg, var(--accent), #5b8eff); color: #07142f; border: none; font-weight: 600; }
.hero-card, .cards article, .stats article, .news-list article, .contact-box {
  background: color-mix(in srgb, var(--panel) 88%, black);
  border: 1px solid var(--line);
  border-radius: 14px;
}
.hero-card { padding: 18px; }
.hero-card h2 { margin-top: 0; }
.section { padding: 54px 0; }
.section.alt { background: color-mix(in srgb, #0f1730 86%, transparent); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section h2 { margin-top: 0; font-size: 28px; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 14px; }
.stats article { padding: 14px; }
.stats h3 { margin: 0 0 6px; font-size: 14px; color: var(--muted); }
.stats p { margin: 0; font-weight: 700; font-size: 18px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.cards article { padding: 14px; }
.cards h3 { margin-top: 0; }
.timeline { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.timeline li { padding: 12px 14px; border: 1px solid var(--line); border-radius: 12px; background: #0e1630; }
.timeline span { display: block; color: var(--muted); }
.news-list { display: grid; gap: 10px; }
.news-list article { padding: 12px 14px; }
.news-list time { color: var(--accent-2); font-size: 13px; }
.contact-box { padding: 14px; color: var(--muted); }
.site-footer { border-top: 1px solid var(--line); color: var(--muted); padding: 20px 0; font-size: 13px; }

@media (max-width: 900px) {
  nav { display: none; }
  .hero-grid, .cards, .stats { grid-template-columns: 1fr; }
}