:root {
  --primary: #15803d;
  --accent: #f97316;
  --ink: #172033;
  --muted: #667085;
  --line: #dfe4ea;
  --bg: #f7f9fc;
  --white: #ffffff;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif; line-height: 1.75; }
a { color: var(--primary); }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.narrow { width: min(780px, 100%); }
.header { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(10px); }
.header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 800; }
.brand-id { display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 12px; color: white; background: var(--primary); font-size: 12px; }
.nav { display: flex; flex-wrap: wrap; gap: 18px; }
.nav a { color: var(--ink); text-decoration: none; font-size: 14px; }
.hero { padding: 72px 0 56px; background: linear-gradient(135deg, color-mix(in srgb, var(--primary) 9%, white), color-mix(in srgb, var(--accent) 12%, white)); }
.hero-grid { display: grid; grid-template-columns: 1.3fr .9fr; gap: 40px; align-items: center; }
.eyebrow { color: var(--primary); font-weight: 800; letter-spacing: .08em; text-transform: uppercase; font-size: 13px; }
h1 { font-size: clamp(34px, 6vw, 58px); line-height: 1.18; margin: 12px 0 18px; }
h2 { font-size: clamp(24px, 4vw, 34px); line-height: 1.3; margin-top: 0; }
h3 { line-height: 1.4; }
.lead { font-size: 18px; color: #364152; }
.hero-card, .card, .notice { border: 1px solid var(--line); background: var(--white); border-radius: 18px; box-shadow: 0 12px 30px rgba(16,24,40,.06); }
.hero-card { padding: 26px; }
.hero-card li { margin-bottom: 8px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button { display: inline-flex; align-items: center; justify-content: center; border-radius: 12px; padding: 12px 18px; text-decoration: none; font-weight: 700; border: 1px solid var(--primary); }
.button.primary { background: var(--primary); color: white; }
.button.secondary { background: white; color: var(--primary); }
.button.disabled { background: #eef1f5; border-color: #d0d5dd; color: #667085; cursor: not-allowed; }
.section { padding: 56px 0; }
.section.muted { background: var(--bg); }
.page-head { padding: 54px 0 28px; background: var(--bg); }
.cards { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.card { padding: 24px; }
.card a { font-weight: 700; }
.number-list { list-style: none; padding: 0; display: grid; gap: 16px; }
.number-list li { display: grid; gap: 6px; padding: 18px; border-left: 4px solid var(--primary); background: var(--bg); border-radius: 0 12px 12px 0; }
.notice { padding: 18px 20px; margin: 24px 0; background: color-mix(in srgb, var(--accent) 10%, white); }
.article { padding: 54px 0; }
.article-section { margin: 44px 0; }
.checklist li { margin: 8px 0; }
.info-list { display: grid; gap: 0; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.info-list div { display: grid; grid-template-columns: 180px 1fr; border-bottom: 1px solid var(--line); }
.info-list div:last-child { border-bottom: 0; }
.info-list dt, .info-list dd { margin: 0; padding: 14px 16px; }
.info-list dt { background: var(--bg); font-weight: 700; }
.link-list li { margin: 10px 0; }
.footer { margin-top: 60px; padding: 42px 0 18px; background: #111827; color: #e5e7eb; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 32px; }
.footer a { color: #e5e7eb; }
.footer-links { display: grid; gap: 8px; }
.copyright { text-align: center; color: #9ca3af; font-size: 13px; margin-top: 28px; }
@media (max-width: 800px) {
  .header-inner, .hero-grid, .footer-grid { display: block; }
  .nav { margin: 14px 0; gap: 12px; }
  .hero { padding-top: 48px; }
  .hero-card { margin-top: 28px; }
  .cards { grid-template-columns: 1fr; }
  .info-list div { grid-template-columns: 1fr; }
  .info-list dt { border-bottom: 1px solid var(--line); }
}