:root{
  --bg:#0b0e14;--bg2:#121722;--card:#171e2c;--ink:#e8ecf4;--mut:#9aa7bd;
  --brand:#00c8a0;--brand2:#0ea5ff;--accent:#ff5ca8;--line:#26304a;
  --glow:rgba(0,200,160,.35);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Hiragino Kaku Gothic ProN",Meiryo,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.75}
a{color:var(--brand2);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
header.site{background:#0a0d13;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.top{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:21px}
.logo:hover{text-decoration:none}
.mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#06120e;font-weight:900}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:24px;cursor:pointer}
nav.main{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
nav.main a{color:var(--mut);padding:8px 11px;border-radius:8px;font-size:14px}
nav.main a.active{color:#06120e;background:var(--brand)}
nav.main a:hover{text-decoration:none;color:#fff;background:var(--line)}
.btn{display:inline-block;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#06120e;font-weight:800;padding:12px 22px;border-radius:10px}
.btn:hover{text-decoration:none;filter:brightness(1.12)}
.btn.sm{padding:8px 14px;font-size:13px}
.btn.ghost{background:transparent;border:2px solid var(--brand);color:var(--brand)}
.hero{background:radial-gradient(900px 500px at 20% -20%,rgba(14,165,255,.25),transparent),radial-gradient(900px 500px at 90% 10%,rgba(0,200,160,.2),transparent),#0b0e14;color:#fff;padding:80px 0 88px;border-bottom:1px solid var(--line)}
.eyebrow{color:var(--brand);font-weight:700;letter-spacing:.14em;font-size:13px;text-transform:uppercase;margin:0 0 14px}
.hero h1{font-size:clamp(2rem,5vw,3.2rem);margin:0 0 16px;line-height:1.2;text-shadow:0 0 30px var(--glow)}
.hero .sub{max-width:740px;color:var(--mut);font-size:16px;margin:0 0 26px}
.cta-row{display:flex;gap:14px;flex-wrap:wrap}
.blk{padding:60px 0}
.blk.alt{background:#0f141f}
h2.sec{font-size:clamp(1.4rem,3vw,1.9rem);margin:0 0 8px;color:#fff}
.sec-sub{color:var(--mut);margin:0 0 28px}
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:0 4px 20px rgba(0,0,0,.4)}
.card h3{margin:0 0 10px;font-size:1.12rem;color:var(--brand)}
.card p{margin:0;color:var(--mut);font-size:14.5px}
.split{display:grid;grid-template-columns:1.4fr 1fr;gap:36px;align-items:center}
.panel{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px 24px}
.ph-line{display:flex;justify-content:space-between;gap:16px;padding:11px 0;border-bottom:1px dashed #2b364e;font-size:14px}
.ph-line:last-child{border-bottom:none}
.ph-line b{color:var(--brand)}
.ph-line span{color:var(--mut);text-align:right}
.note{background:rgba(255,92,168,.08);border:1px solid rgba(255,92,168,.35);border-radius:10px;padding:14px 16px;color:#f0a9c9;font-size:14px;margin-top:26px}
.pagehead{background:radial-gradient(800px 400px at 80% -10%,rgba(14,165,255,.2),transparent),#0b0e14;color:#fff;padding:56px 0;border-bottom:1px solid var(--line)}
.pagehead h1{font-size:clamp(1.7rem,4vw,2.4rem);margin:0 0 12px}
.pagehead .sub{color:var(--mut);max-width:760px;margin:0}
.steps{display:grid;gap:14px}
.step{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:12px;padding:18px 20px}
.step b{color:var(--brand)}
.step p{margin:6px 0 0;color:var(--mut);font-size:14.5px}
.qa{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px 24px;margin-bottom:16px}
.qa h3{margin:0 0 8px;color:var(--brand);font-size:1.05rem}
.qa p{margin:0;color:var(--mut);font-size:15px}
footer.site{background:#0a0d13;border-top:1px solid var(--line);color:var(--mut);padding:36px 0;font-size:13px}
footer.site p{margin:6px 0}
@media(max-width:860px){
  .nav-toggle{display:block}
  nav.main{display:none;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:#0a0d13;padding:12px;border-bottom:1px solid var(--line)}
  nav.main.open{display:flex}
  nav.main a{padding:12px}
  .g2,.g3{grid-template-columns:1fr}
  .split{grid-template-columns:1fr}
  .hero,.pagehead{padding:52px 0}
  .blk{padding:42px 0}
}