:root{--bg:#f8fafc;--ink:#0f172a;--primary:#0ea5e9;--primary-dark:#0284c7;--muted:#475569;--card:#ffffff;--line:#e2e8f0;--gold:#d97706;--green:#16a34a}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"Noto Sans JP",sans-serif;line-height:1.6;color:var(--ink);background:var(--bg)}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1100px;margin:0 auto;padding:28px 20px}
.site-header{background:var(--primary);color:#fff;position:sticky;top:0;z-index:10}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none}
.brand img{height:36px;width:auto;display:block}
.brand-name{font-weight:700;letter-spacing:.02em}
.nav a{color:#fff;margin-left:16px;font-weight:500}
.nav .cta{background:#fff;color:var(--primary);padding:8px 12px;border-radius:10px}
.hero{padding:32px 0}
.hero-content{background:linear-gradient(135deg, rgba(14,165,233,.10), rgba(2,132,199,.10));border:1px solid var(--line);border-radius:18px;padding:28px}
.hero h1{font-size:28px;margin:0 0 10px;color:var(--primary-dark)}
.hero-cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
.btn{display:inline-block;background:var(--primary);color:#fff;padding:10px 16px;border-radius:10px;text-decoration:none;font-weight:600}
.btn:hover{background:var(--primary-dark);text-decoration:none}
.btn.ghost{background:#fff;color:var(--primary);border:1px solid var(--primary)}
.btn.small{padding:8px 12px;font-size:14px}
.note{color:var(--muted);font-size:13px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:0 6px 16px rgba(0,0,0,.05)}
.price{font-size:22px;font-weight:800;color:var(--primary)}
.badge{position:relative;display:inline-block;background:var(--primary);color:#fff;padding:2px 8px;border-radius:999px;font-size:12px;margin-bottom:4px}
.badge.gold{background:var(--gold)}
.badge.green{background:var(--green)}
.kv{list-style:none;padding:0;margin:0}
.kv li{display:grid;grid-template-columns:160px 1fr;gap:14px;padding:10px 0;border-bottom:1px dashed var(--line)}
.kv li span{color:var(--muted)}
.site-footer{background:#0b1324;color:#e5e7eb;margin-top:40px}
.footer-inner{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}
.footer-links a{color:#93c5fd;margin-left:12px}
.copy{text-align:center;padding:10px 0;border-top:1px solid rgba(255,255,255,.12);font-size:12px;opacity:.8}
@media (max-width:900px){
  .grid3,.grid2,.grid4{grid-template-columns:1fr}
  .header-inner{flex-direction:column;align-items:flex-start}
  .nav a{margin-left:0;margin-right:12px}
}