:root {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --text: #1f2937;
  --muted: #5b6472;
  --line: #e6ebf2;
  --primary: #0f5cc0;
  --primary-dark: #0a4288;
  --shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
  --radius: 22px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Noto Sans JP', system-ui, sans-serif;
  color: var(--text);
  background: var(--surface);
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(230,235,242,0.8);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 76px; gap: 20px;
}
.brand img { height: 30px; width: auto; }
.nav-links { display: flex; gap: 28px; font-weight: 500; }
.nav-links a { color: var(--muted); }
.nav-links a:hover { color: var(--primary); }
.nav-toggle {
  display: none; border: 0; background: transparent; font-size: 28px; cursor: pointer;
}
.hero {
  position: relative; min-height: 86vh; display: flex; align-items: center;
  color: white; overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background:
    linear-gradient(120deg, rgba(7,20,45,0.82), rgba(11,50,106,0.58)),
    url('img/1920x1080_top1.jpg') center/cover no-repeat;
}
.hero-inner { position: relative; z-index: 1; padding: 100px 0; }
.eyebrow {
  margin: 0 0 12px; font-size: 14px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: #8dc3ff;
}
.hero h1 {
  margin: 0; font-size: clamp(2.2rem, 4.8vw, 4.6rem); line-height: 1.15; letter-spacing: -0.02em;
}
.lead {
  max-width: 720px; margin: 22px 0 0; font-size: clamp(1rem, 1.8vw, 1.2rem); color: rgba(255,255,255,0.9);
}
.hero-actions { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 22px; border-radius: 999px; font-weight: 700;
}
.btn-primary { background: white; color: var(--primary-dark); }
.btn-secondary { border: 1px solid rgba(255,255,255,0.35); color: white; }
.section { padding: 88px 0; }
.section.alt { background: var(--bg); }
.section-heading { margin-bottom: 28px; }
.section-heading.center { text-align: center; max-width: 860px; margin: 0 auto; }
.section-heading h2 {
  margin: 0; font-size: clamp(1.8rem, 3vw, 3rem); line-height: 1.25; letter-spacing: -0.02em;
}
.section-heading p:last-child, .intro p { color: var(--muted); }
.card-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px;
}
.card, .contact-card, .highlight-box {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
}
.card { padding: 28px; }
.card h3 { margin-top: 0; margin-bottom: 12px; font-size: 1.2rem; }
.card p { margin: 0; color: var(--muted); }
.split, .image-layout, .contact-grid {
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 32px; align-items: center;
}
.check-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.check-list li {
  position: relative; padding-left: 30px; color: var(--muted);
}
.check-list li::before {
  content: '✓'; position: absolute; left: 0; top: 0; color: var(--primary); font-weight: 800;
}
.highlight-box { padding: 28px; }
.mini-label { margin-top: 0; font-size: 13px; font-weight: 800; letter-spacing: .08em; color: var(--primary); }
.pill-wrap { display: flex; flex-wrap: wrap; gap: 10px; }
.pill {
  display: inline-flex; align-items: center; min-height: 38px; padding: 0 14px;
  background: #eef5ff; color: var(--primary-dark); border-radius: 999px; font-weight: 700; font-size: 0.95rem;
}
.image-frame {
  border-radius: 28px; overflow: hidden; box-shadow: var(--shadow); min-height: 100%;
}
.image-frame img { width: 100%; height: 100%; object-fit: cover; }
.contact-card { padding: 28px; }
.contact-card dl { margin: 0; display: grid; gap: 16px; }
.contact-card div { display: grid; grid-template-columns: 84px 1fr; gap: 12px; }
.contact-card dt { font-weight: 700; }
.contact-card dd { margin: 0; color: var(--muted); }
.contact-card a { color: var(--primary-dark); }
.site-footer {
  background: #0f172a; color: rgba(255,255,255,0.8); padding: 28px 0;
}
.footer-inner {
  display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap;
}
.footer-inner img { height: 30px; width: auto; }
@media (max-width: 920px) {
  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .split, .image-layout, .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; top: 76px; left: 20px; right: 20px; flex-direction: column;
    background: white; border: 1px solid var(--line); border-radius: 18px; padding: 16px; box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .hero { min-height: 74vh; }
  .section { padding: 68px 0; }
  .card-grid { grid-template-columns: 1fr; }
  .contact-card div { grid-template-columns: 1fr; gap: 4px; }
}