:root{
  --bg:#ffffff;
  --fg:#0f172a;
  --muted:#64748b;
  --accent:#0891b2;
  --accent-2:#06b6d4;
  --border:#e2e8f0;
  --card:#f8fafc;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,Arial,sans-serif;line-height:1.7}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1080px;margin:0 auto;padding:24px}
.site-nav{position:sticky;top:0;background:rgba(255,255,255,.8);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:12px 24px;z-index:20}
.site-nav .brand{font-weight:700;font-size:20px;color:var(--fg)}
.site-nav .links a{margin-left:16px;color:var(--fg)}
.hero{padding:72px 24px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff}
.hero h1{font-size:36px;margin:0 0 12px}
.hero p{margin:0;opacity:.95}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:20px}
.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}
.col-12{grid-column:span 12}
.col-6{grid-column:span 6}
@media (max-width:800px){.col-6{grid-column:span 12} .hero h1{font-size:28px}}
.h2{font-size:24px;margin:24px 0 12px}
.h3{font-size:18px;margin:16px 0 8px}
.list{padding-left:18px}
.btn{display:inline-block;background:#fff;color:var(--accent);border:1px solid #fff;border-radius:999px;padding:10px 16px;margin-top:12px;font-weight:600}
.btn:hover{background:rgba(255,255,255,.9);text-decoration:none}
.kv{border-radius:18px;overflow:hidden;border:1px solid var(--border)}
.table{width:100%;border-collapse:collapse;border:1px solid var(--border);background:#fff;border-radius:12px;overflow:hidden}
.table th,.table td{border-bottom:1px solid var(--border);padding:12px 14px;text-align:left;vertical-align:top}
.badge{display:inline-block;background:var(--card);border:1px solid var(--border);padding:4px 10px;border-radius:999px;color:var(--muted);font-size:12px}
.section{margin:32px 0}
.lead{font-size:18px;color:#0b1220}
.muted{color:var(--muted);font-size:14px}
.site-footer{border-top:1px solid var(--border);padding:24px;text-align:center;color:var(--muted)}