:root{
  --bg:#ffffff; --ink:#0f172a; --muted:#475569; --line:#e2e8f0; --band:#f9fafb;
  --primary:#3b82f6; --primary-ink:#ffffff; --accent:#22c55e; --danger:#ef4444;
  --radius:16px; --shadow:0 8px 24px rgba(2,6,23,.08); --shadow-soft:0 4px 14px rgba(2,6,23,.08);
  --w:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family: system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif; color:var(--ink); background:var(--bg); line-height:1.7}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--w);margin:0 auto;padding:0 20px}
.sr-only{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:12px 0}
.brand{display:flex;align-items:center;gap:10px}
.logo{width:40px;height:40px;border-radius:50%;background:radial-gradient(circle at 30% 30%, var(--primary), #60a5fa);box-shadow:var(--shadow-soft)}
nav ul{display:flex;gap:18px;list-style:none;margin:0;padding:0;align-items:center;flex-wrap:wrap}
nav a{color:var(--ink);font-weight:800}
.cta-inline{display:flex;gap:8px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 14px;border-radius:999px;border:1px solid transparent;font-weight:800;box-shadow:var(--shadow-soft);cursor:pointer}
.btn--primary{background:var(--primary);color:var(--primary-ink)}
.btn--ghost{background:#fff;color:var(--primary);border-color:var(--primary)}
.btn--tel{background:#fff;border-color:var(--line)}

.hero{background:linear-gradient(180deg,#eef2ff 0%,#ffffff 40%)}
.hero .wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:center;padding:48px 0}
.hero h1{margin:0 0 8px;font-size:clamp(1.8rem,1.1rem + 2.6vw,3.1rem);line-height:1.2;font-weight:900}
.hero p.lead{color:var(--muted);font-size:clamp(1rem,.95rem + .6vw,1.2rem);margin:.2rem 0 1rem}
.badges{display:flex;flex-wrap:wrap;gap:10px;margin:10px 0 18px}
.badge{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 12px;font-weight:800;box-shadow:var(--shadow-soft)}
.illust{aspect-ratio:4/3;border-radius:var(--radius);background:conic-gradient(from 0deg,#dbeafe,#e0f2fe,#f1f5f9,#fff);box-shadow:var(--shadow)}

section{padding:64px 0}
section h2{font-size:clamp(1.4rem,1rem + 1.2vw,2rem);margin:0 0 12px}
.lead{color:var(--muted);margin:0 0 18px}
.band{background:var(--band);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow-soft)}
.card h3{margin:0 0 8px;font-size:1.05rem}

.two{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px}

table{width:100%;border-collapse:collapse}
th,td{padding:12px 10px;border-bottom:1px solid var(--line);text-align:left}
th{background:#fff}

details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:10px}
summary{cursor:pointer;font-weight:800}

footer{padding:48px 0 96px;border-top:1px solid var(--line)}
.float-cta{position:fixed;right:16px;bottom:16px;z-index:90}
.float-cta .btn{box-shadow:var(--shadow)}

@media (max-width:980px){
  nav ul{display:none}
  .hero .wrap{grid-template-columns:1fr;padding:40px 0}
  .cards,.steps,.two{grid-template-columns:1fr}
}