:root{
  --bg:#ffffff;
  --text:#0f172a;
  --muted:#475569;
  --card:#f8fafc;
  --line:#e2e8f0;
  --accent:#2563eb;
  --accent2:#7c3aed;
  --shadow: 0 10px 30px rgba(2,6,23,.08);
  --radius: 16px;
  --max: 1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, "Noto Sans JP", sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.65;
}
a{color:inherit}
img{max-width:100%;display:block}
.container{width:min(var(--max), 92vw); margin:0 auto}
.small{font-size:13px;color:var(--muted)}
.kicker{letter-spacing:.12em;text-transform:uppercase;font-size:12px;color:var(--muted)}
h1{font-size:40px;line-height:1.15;margin:10px 0 12px}
h2{font-size:30px;line-height:1.2;margin:0 0 10px}
h3{font-size:18px;margin:0 0 8px}
p{margin:0 0 16px;color:var(--muted)}
.section{padding:72px 0}
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow: none;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 16px;border-radius:12px;
  border:1px solid var(--line);
  background: rgba(37,99,235,.1);
  color:var(--text);
  text-decoration:none;
  font-weight:700;
}
.btn.primary{
  background: var(--accent);
  color:#fff;border-color:transparent;
}
.btn.ghost{background:transparent}
.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 10px;border-radius:999px;
  border:1px solid var(--line); background:#fff;
  font-size:13px;color:var(--muted);
}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.header{
  position:sticky;top:0;z-index:30;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand svg{color:var(--text)}
.nav{display:flex;gap:16px;align-items:center}
.nav a{text-decoration:none;color:var(--muted);font-size:14px}
.nav a:hover{color:var(--text)}
.hero{
  padding:34px 0 54px;
  background: linear-gradient(135deg, rgba(37,99,235,.08), rgba(124,58,237,.06));
  border-bottom: 1px solid var(--line);
}
.hero-wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:18px;align-items:center}
.hero-visual{
  border-radius:24px;
  border:1px solid var(--line);
  overflow:hidden;
  box-shadow: var(--shadow);
  background:#0b1220;
}
.hero-visual img{width:100%;height:auto}
.list{margin:12px 0 0; padding:0; list-style:none}
.list li{display:flex;gap:8px;align-items:flex-start;color:var(--muted);margin:8px 0}
.list li:before{content:"✓";color:var(--accent);font-weight:900}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}
.stat{padding:14px;border-radius:14px;border:1px solid var(--line);background:#fff}
.stat .n{font-size:26px;font-weight:800;color:var(--text)}
.stat .l{font-size:13px;color:var(--muted)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:18px}
.section-head p{max-width:60ch}
.service-card{padding:16px}
.case-card{padding:16px;display:flex;flex-direction:column;gap:12px}
.case-thumb{border-radius:14px;border:1px solid var(--line);overflow:hidden;background:#fff}
.case-thumb img{width:100%}
.pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.price-card{padding:18px}
.price{font-size:28px;font-weight:900;margin:6px 0 10px;color:var(--text)}
.ul{margin:0;padding-left:18px;color:var(--muted)}
.ul li{margin:7px 0}
.faq{display:grid;grid-template-columns:1fr;gap:10px;max-width:860px}
.faq-item{padding:14px 16px}
.footer{
  padding:36px 0;
  border-top:1px solid var(--line);
  background:#fff;
}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:14px}
.footer a{text-decoration:none;color:var(--muted)}
.footer a:hover{color:var(--text)}
/* Responsive */
@media (max-width: 980px){
  h1{font-size:34px}
  .hero-wrap{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr}
  .pricing{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width: 560px){
  .nav{display:none}
  .section{padding:56px 0}
  .stats{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
}

/* HIGH: premium interactions + sticky CTA */
:root{ --shadow: 0 22px 60px rgba(2,6,23,.14); }
.card{box-shadow: var(--shadow);}
.reveal{opacity:0; transform: translateY(14px); transition: opacity .7s ease, transform .7s ease;}
.reveal.is-in{opacity:1; transform:none;}
.sticky-cta{
  position:fixed; left:12px; right:12px; bottom:12px; z-index:60;
  display:none; gap:10px; align-items:center; justify-content:space-between;
  padding:12px 14px; border-radius:16px; border:1px solid var(--line);
  background: rgba(255,255,255,.92); backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
}
.sticky-cta .txt{font-weight:800}
.sticky-cta .small{margin-top:2px}
@media (max-width: 980px){ .sticky-cta{display:flex;} }
.counter{font-variant-numeric: tabular-nums;}
.carousel{
  display:flex; gap:12px; overflow:auto; scroll-snap-type:x mandatory; padding-bottom:6px;
}
.carousel::-webkit-scrollbar{height:8px}
.carousel::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:999px}
.carousel .case-card{min-width: 320px; scroll-snap-align:start}
@media (max-width: 560px){
  .carousel .case-card{min-width: 86vw;}
}