:root{
  --ink:#050038;--paper:#ffffff;--card:#ffffff;--line:#e4e4f2;
  --accent:#ffd02f;--accent2:#ffa83c;--mut:#5a5a78;--maxw:1120px;--dark:#0a0950;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:"Hiragino Kaku Gothic ProN","Yu Gothic",system-ui,sans-serif;line-height:1.78}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
ul.list{margin:14px 0 0 22px}.list li{margin-bottom:10px}

header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.hd{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.35rem}
.logo img{border-radius:6px}
nav.main{display:flex;gap:24px;align-items:center;font-size:.94rem}
nav.main a{padding:6px 2px;border-bottom:2px solid transparent;font-weight:600;color:#3d3d63}
nav.main a:hover,nav.main a.active{color:var(--ink);border-color:var(--accent)}
.nav-toggle{display:none;background:none;border:0;font-size:1.6rem;color:var(--ink);cursor:pointer}

.btn{display:inline-block;background:var(--ink);color:#fff;padding:13px 30px;border-radius:999px;font-weight:800;font-size:.95rem;transition:.15s}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(5,0,56,.2)}
.btn.ghost{background:transparent;color:var(--ink);border:1.6px solid var(--ink)}
.btn.light{background:#fff;color:var(--ink)}
.btn.sm{padding:8px 18px;font-size:.85rem}

.hero{padding:78px 0 64px;background:
  radial-gradient(circle at 14% 12%, rgba(255,208,47,.35), transparent 40%),
  radial-gradient(circle at 90% 18%, rgba(255,168,60,.2), transparent 42%),
  #fbfbff}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.eyebrow{display:inline-block;color:var(--ink);font-weight:800;letter-spacing:.06em;font-size:.82rem;margin-bottom:18px;background:var(--accent);padding:7px 16px;border-radius:999px}
.hero h1{font-size:clamp(2.3rem,5.4vw,3.6rem);line-height:1.08;font-weight:900;letter-spacing:-.01em}
.hero .sub{margin:22px 0 0;max-width:640px;color:#4a4a70;font-size:1.05rem}
.cta-row{margin-top:32px;display:flex;gap:14px;flex-wrap:wrap}
.hero-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 16px 46px rgba(5,0,56,.12)}
.hc-head{display:flex;gap:7px;align-items:center;margin-bottom:14px}
.hc-dot{width:11px;height:11px;border-radius:50%;background:var(--accent)}
.hc-title{color:var(--mut);font-size:.86rem;font-weight:700}
.hc-body{background:linear-gradient(150deg,#f7f7ff,#eef0fb);border:1px dashed #c9cbe8;border-radius:12px;padding:22px}
.note-stack{display:flex;flex-wrap:wrap;gap:10px}
.note-stack span{background:#fff;border:1px solid var(--line);padding:12px 16px;border-radius:10px;font-size:.92rem;font-weight:600;box-shadow:0 4px 12px rgba(5,0,56,.06)}
.n1{transform:rotate(-2deg)}.n2{transform:rotate(1deg)}.n3{transform:rotate(-1deg)}
.hc-flow{display:flex;gap:10px;margin:14px 0;color:var(--mut)}
.arrow{font-weight:900;color:var(--accent2)}
.hc-meta{color:var(--mut);font-size:.84rem}

.blk{padding:62px 0}
.blk.alt{background:#f4f4fc}
h2.sec{font-size:1.66rem;font-weight:900;margin-bottom:12px}
p.sec-sub{color:var(--mut);margin-bottom:32px;max-width:680px}
.grid{display:grid;gap:22px}
.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:16px;padding:26px;box-shadow:0 6px 18px rgba(5,0,56,.05)}
.card h3{font-size:1.12rem;margin-bottom:8px}
.card p{color:#4a4a70;font-size:.95rem}
.note{background:#fff6d8;border-left:4px solid var(--accent);padding:16px 20px;border-radius:10px;color:#5a5a3a;font-size:.93rem;margin-top:26px}
.note a{color:var(--accent2);font-weight:700}
.narrow{max-width:840px!important}

.phead{padding:54px 0 30px;border-bottom:1px solid var(--line)}
.phead h1{font-size:clamp(1.9rem,4.4vw,2.8rem);font-weight:900;line-height:1.15}
.lede{margin-top:14px;max-width:700px;color:#4a4a70;font-size:1.03rem}
.crumb{font-size:.85rem;color:var(--mut);margin-bottom:16px}
.crumb a{color:var(--ink)}

.steps{display:flex;flex-direction:column;gap:14px}
.step{display:flex;gap:18px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px 22px;align-items:flex-start}
.step b{font-size:1.2rem;font-weight:900;color:var(--accent2);min-width:40px}
.step strong{color:var(--ink)}
.step p{color:#4a4a70;font-size:.94rem}

.cta-band{background:var(--ink);color:#fff;padding:64px 0;text-align:center}
.cta-band .wrap{display:flex;flex-direction:column;align-items:center;max-width:760px}
.cta-band h2{font-size:1.7rem;font-weight:900}
.cta-band p{color:rgba(255,255,255,.82);margin:12px 0 26px}

.faqwrap{display:flex;flex-direction:column;gap:12px}
.faq{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.faq summary{padding:18px 22px;cursor:pointer;font-weight:800;color:var(--ink);list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.3rem;color:var(--accent2)}
.faq[open] summary::after{content:"–"}
.faq .a{padding:2px 22px 18px;color:#4a4a70;font-size:.95rem}

footer.site{border-top:1px solid var(--line);margin-top:60px;padding:44px 0 36px;background:#fbfbff;color:var(--mut);font-size:.88rem}
.ft{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.ft p{max-width:400px;margin-top:10px;font-size:.85rem;line-height:1.7}
.ft nav{display:flex;gap:20px;flex-wrap:wrap}
.ft nav a:hover{color:var(--ink)}
.ft .logo{font-weight:800;color:var(--ink)}

@media(max-width:840px){
  .g3{grid-template-columns:1fr}
  .g2{grid-template-columns:1fr}
  .hero-grid{grid-template-columns:1fr}
  .nav-toggle{display:block}
  nav.main{position:fixed;top:64px;left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;padding:18px 24px;gap:15px;border-bottom:1px solid var(--line);display:none;box-shadow:0 12px 30px rgba(0,0,0,.1)}
  nav.main.open{display:flex}
  nav.main .btn{display:inline-block}
  .hero{padding:52px 0 48px}
  .phead{padding:38px 0 22px}
}