*{box-sizing:border-box}
:root{
  --bg:#071a35;
  --bg2:#0b2750;
  --text:#10213a;
  --muted:#5c6b7d;
  --line:#dfe6ef;
  --soft:#f4f7fb;
  --white:#ffffff;
  --accent:#2563eb;
  --accent2:#3b82f6;
}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;
  color:var(--text);
  background:var(--white);
  line-height:1.8;
}
a{color:inherit}
.container{width:min(1120px,calc(100% - 40px));margin:0 auto}
.narrow{width:min(760px,100%);margin-left:auto;margin-right:auto}

.site-header{
  position:sticky;top:0;z-index:20;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(223,230,239,.8);
}
.nav-wrap{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;font-size:1.15rem}
.brand-mark{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  background:var(--bg);color:white;font-size:.85rem;letter-spacing:.02em
}
.nav{display:flex;gap:24px;align-items:center}
.nav a{text-decoration:none;color:#405168;font-size:.94rem;font-weight:600}
.nav a:hover{color:var(--accent)}

.hero{
  padding:92px 0 88px;
  color:white;
  background:
    radial-gradient(circle at 80% 20%,rgba(59,130,246,.32),transparent 32%),
    linear-gradient(135deg,var(--bg),var(--bg2));
}
.hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:64px;align-items:center}
.eyebrow,.section-kicker{font-size:.78rem;font-weight:800;letter-spacing:.18em;text-transform:uppercase}
.eyebrow{color:#93c5fd}
.hero h1{font-size:clamp(2.3rem,5vw,4.7rem);line-height:1.15;margin:.25em 0 .35em;letter-spacing:-.03em}
.lead{font-size:1.1rem;color:#dbeafe;max-width:640px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px}
.btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;border-radius:12px;padding:12px 20px;font-weight:800}
.btn.primary{background:white;color:var(--bg)}
.btn.secondary{border:1px solid rgba(255,255,255,.4);color:white}
.hero-card{
  background:white;color:var(--text);border-radius:28px;padding:28px;
  box-shadow:0 30px 80px rgba(0,0,0,.25);transform:rotate(2deg)
}
.chip{display:inline-block;background:#eaf2ff;color:var(--accent);font-weight:800;padding:8px 12px;border-radius:999px}
.card-lines{display:grid;gap:12px;margin:28px 0}
.card-lines span{height:12px;border-radius:999px;background:#e6edf7}
.card-lines span:nth-child(2){width:82%}
.card-lines span:nth-child(3){width:64%}
.quiz-row{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.quiz-row div{background:var(--soft);border:1px solid var(--line);border-radius:12px;display:grid;place-items:center;padding:16px;font-weight:800}
.hero-card p{margin-bottom:0;color:var(--muted);font-size:.9rem}

.section{padding:84px 0}
.section.alt{background:var(--soft)}
.section-kicker{color:var(--accent);margin-bottom:8px}
.section h2{font-size:clamp(1.8rem,3vw,2.6rem);line-height:1.35;margin:0 0 22px}
.section p{color:#43536a}
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}

.app-card{
  margin-top:28px;background:white;border:1px solid var(--line);border-radius:24px;
  padding:32px;display:grid;grid-template-columns:110px 1fr;gap:28px;
  box-shadow:0 12px 35px rgba(16,33,58,.06)
}
.app-icon{
  width:96px;height:96px;border-radius:24px;background:var(--bg);color:white;
  display:grid;place-items:center;font-size:2.2rem;font-weight:900
}
.status{display:inline-block;font-size:.72rem;font-weight:900;letter-spacing:.14em;color:var(--accent);margin-bottom:7px}
.app-content h3{font-size:1.6rem;margin:0 0 10px}
.features{padding-left:1.25rem;color:#43536a}
.small-note{font-size:.88rem;color:#738196!important}

.contact{text-align:center;background:linear-gradient(180deg,#fff,#f7f9fc)}
.mail-link{display:inline-block;margin-top:8px;font-size:1.25rem;font-weight:800;color:var(--accent);text-decoration:none}
.mail-link:hover{text-decoration:underline}

.site-footer{background:#06152b;color:#b8c5d9;padding:28px 0}
.footer-wrap{display:flex;justify-content:space-between;gap:24px;align-items:center}
.site-footer a{color:#dbeafe;text-decoration:none}

.policy-hero{padding:72px 0 44px;background:var(--soft);border-bottom:1px solid var(--line)}
.policy-hero h1{font-size:clamp(2rem,4vw,3.2rem);margin:0 0 8px}
.policy h2{font-size:1.35rem;margin-top:42px;margin-bottom:10px}
.policy ul{color:#43536a}
.policy-note{
  margin-top:40px;padding:18px 20px;border:1px solid #f1c97c;background:#fff8e8;
  border-radius:14px;color:#73510d
}

@media (max-width:760px){
  .container{width:min(100% - 28px,1120px)}
  .nav{gap:12px}
  .nav a:nth-child(1),.nav a:nth-child(2){display:none}
  .hero{padding:68px 0 64px}
  .hero-grid,.split{grid-template-columns:1fr}
  .hero-card{max-width:420px;transform:none}
  .section{padding:64px 0}
  .app-card{grid-template-columns:1fr;padding:24px}
  .footer-wrap{flex-direction:column;align-items:flex-start}
}