:root {
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  color: #18212b;
  background: #f7f8fa;
  line-height: 1.75;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: #fff; }
a { color: inherit; }
.shell { width: min(1080px, calc(100% - 40px)); margin: 0 auto; }
.site-header { border-bottom: 1px solid #e2e6eb; background: rgba(255,255,255,.96); position: sticky; top: 0; z-index: 10; }
.header-inner { min-height: 68px; display: flex; align-items: center; gap: 22px; }
.brand { font-weight: 800; letter-spacing: .08em; text-decoration: none; }
.environment { font-size: .78rem; padding: 4px 9px; border: 1px solid #d7a43a; border-radius: 999px; background: #fff8e8; }
nav { margin-left: auto; display: flex; gap: 20px; }
nav a { text-decoration: none; font-size: .92rem; }
.hero { padding: 96px 0 84px; }
.eyebrow { margin: 0 0 12px; font-size: .78rem; letter-spacing: .16em; font-weight: 800; color: #65717f; }
.hero h1 { font-size: clamp(2.4rem, 7vw, 5.4rem); line-height: 1.08; letter-spacing: -.04em; margin: 0; max-width: 900px; }
.lead { max-width: 720px; font-size: 1.15rem; color: #4f5c69; margin: 28px 0; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 18px; border-radius: 9px; text-decoration: none; font-weight: 700; }
.primary { background: #18212b; color: #fff; }
.secondary { border: 1px solid #c9d0d8; background: #fff; }
.section { padding: 76px 0; }
.section-muted { background: #f5f7f9; }
.section-heading { margin-bottom: 30px; }
.section h2 { font-size: clamp(1.7rem, 4vw, 2.6rem); margin: 0; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card, .product-card { border: 1px solid #e1e5ea; border-radius: 14px; background: #fff; padding: 26px; }
.card h3, .product-card h3 { margin-top: 0; }
.product-card { display: flex; gap: 30px; justify-content: space-between; align-items: center; }
.product-card > div { max-width: 700px; }
.product-label { font-size: .76rem; font-weight: 800; color: #65717f; }
.company-list { margin: 0; border-top: 1px solid #e1e5ea; }
.company-list div { display: grid; grid-template-columns: 180px 1fr; gap: 20px; padding: 16px 0; border-bottom: 1px solid #e1e5ea; }
.company-list dt { font-weight: 700; }
.company-list dd { margin: 0; }
.compact { max-width: 760px; }
.link-list { display: grid; gap: 10px; margin-top: 24px; }
.link-list a { padding: 14px 0; border-bottom: 1px solid #dce1e7; text-decoration: none; }
.site-footer { padding: 34px 0; border-top: 1px solid #e2e6eb; }
.footer-inner { display: flex; justify-content: space-between; gap: 20px; color: #697482; font-size: .85rem; }
.legal { max-width: 820px; padding: 64px 0 90px; }
.legal h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
.legal h2 { margin-top: 42px; font-size: 1.35rem; }
.legal table { width: 100%; border-collapse: collapse; }
.legal th, .legal td { border: 1px solid #d8dee5; padding: 10px; text-align: left; vertical-align: top; }
.back { display: inline-block; margin-bottom: 24px; }
@media (max-width: 760px) {
  .header-inner { flex-wrap: wrap; padding: 12px 0; }
  nav { width: 100%; margin: 0; gap: 14px; overflow-x: auto; }
  .hero { padding-top: 64px; }
  .grid { grid-template-columns: 1fr; }
  .product-card { align-items: flex-start; flex-direction: column; }
  .company-list div { grid-template-columns: 1fr; gap: 4px; }
  .footer-inner { flex-direction: column; }
}