:root{--bg:#0b0f14;--card:#111826;--text:#e8eef7;--muted:#a7b3c3;--line:#1f2a3a;--accent:#7dd3fc;}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Hiragino Kaku Gothic ProN","Hiragino Sans","Noto Sans JP","Yu Gothic",Meiryo,sans-serif;background:var(--bg);color:var(--text);}
a{color:inherit}
.container{max-width:980px;margin:0 auto;padding:24px}
.header{position:sticky;top:0;background:rgba(11,15,20,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);z-index:20}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 24px;max-width:980px;margin:0 auto}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.02em}
.badge{font-size:12px;color:var(--muted);border:1px solid var(--line);padding:4px 10px;border-radius:999px}
.nav{display:flex;gap:14px;flex-wrap:wrap}
.nav a{font-size:13px;color:var(--muted);text-decoration:none}
.nav a:hover{color:var(--text)}
.hero{padding:44px 0 18px}
h1{font-size:38px;line-height:1.2;margin:0 0 14px}
.sub{font-size:16px;line-height:1.7;color:var(--muted);max-width:740px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin:18px 0 8px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:14px 16px;border-radius:14px;border:1px solid var(--line);text-decoration:none;font-weight:700}
.btn.primary{background:var(--accent);color:#061018;border-color:transparent}
.btn.primary:hover{filter:brightness(1.02)}
.btn.secondary{background:transparent;color:var(--text)}
.btn.secondary:hover{border-color:#334155}
.small{font-size:12px;color:var(--muted);line-height:1.6}
.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:16px;margin:24px 0}
.card{grid-column:span 12;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px}
@media(min-width:860px){
  .card.half{grid-column:span 6}
  .card.third{grid-column:span 4}
}
h2{font-size:22px;margin:0 0 10px}
ul{margin:10px 0 0 18px;color:var(--text)}
li{margin:6px 0;color:var(--text)}
.kv{display:flex;align-items:flex-start;gap:10px;margin-top:10px;color:var(--text)}
.kv .check{flex:0 0 auto;width:22px;height:22px;border-radius:6px;background:#1f2937;border:1px solid var(--line);display:grid;place-items:center}
.kv .check span{color:var(--accent);font-weight:800}
.hr{height:1px;background:var(--line);margin:20px 0}
.faq dt{font-weight:700;margin-top:12px}
.faq dd{margin:6px 0 0;color:var(--muted);line-height:1.7}
.footer{border-top:1px solid var(--line);margin-top:34px;padding:18px 0 40px;color:var(--muted)}
.footer a{color:var(--muted);text-decoration:none}
.footer a:hover{color:var(--text)}
.notice{font-size:13px;color:var(--muted);line-height:1.75}
.page-title{margin:18px 0 8px;font-size:28px}
.prose{color:var(--text);line-height:1.85}
.prose p{color:var(--muted)}
.prose h3{margin:18px 0 8px}