:root {
  --bg: #070b14;
  --bg-soft: #0f172a;
  --surface: #111c35;
  --surface-2: #162442;
  --line: #2a3f72;
  --text: #e5ecff;
  --muted: #a8b6da;
  --primary: #5b8cff;
  --accent: #45d0a7;
  --danger: #ff7b7b;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Noto Sans JP', 'Inter', system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 520px at 20% -10%, #284071 0%, transparent 60%),
    radial-gradient(1000px 500px at 90% 0%, #1a325e 0%, transparent 52%),
    linear-gradient(180deg, #080d17 0%, #070b14 100%);
  line-height: 1.7;
}
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.site-header { position: sticky; top: 0; z-index: 20; backdrop-filter: blur(8px); background: rgba(7,11,20,.65); border-bottom: 1px solid rgba(95,124,188,.2); }
.header-row { display: flex; justify-content: space-between; align-items: center; min-height: 64px; }
.brand { color: var(--text); text-decoration: none; font-weight: 700; letter-spacing: .04em; }
.nav { display: flex; gap: 16px; flex-wrap: wrap; }
.nav a { color: var(--muted); text-decoration: none; font-size: 14px; }
.nav a:hover { color: #fff; }

.hero { padding: 82px 0 40px; }
.hero-shell {
  background: linear-gradient(145deg, rgba(70,105,180,.24), rgba(19,31,59,.9));
  border: 1px solid rgba(129,160,235,.35);
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(0,0,0,.35);
  padding: 40px;
}
.badge { display: inline-block; padding: 6px 12px; border-radius: 999px; font-size: 12px; font-weight: 700; color: #d8e6ff; background: rgba(91,140,255,.18); border: 1px solid rgba(126,162,255,.4); }
h1 { margin: 14px 0 10px; font-size: clamp(34px, 5.4vw, 58px); line-height: 1.15; letter-spacing: -.02em; }
.lead { color: var(--muted); max-width: 760px; margin-bottom: 24px; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 18px; border-radius: 12px; text-decoration: none; font-weight: 700; transition: .2s ease; }
.btn.primary { background: linear-gradient(135deg, var(--accent), #28b2ff); color: #04111a; }
.btn.primary:hover { transform: translateY(-1px); filter: brightness(1.03); }
.btn.ghost { color: #dbe7ff; border: 1px solid rgba(157,182,240,.45); background: rgba(17,28,53,.35); }

.section { padding: 22px 0; }
.section h2 { font-size: clamp(24px, 3vw, 36px); line-height: 1.25; margin: 8px 0 14px; }
.section p.sub { color: var(--muted); margin-top: 0; }

.grid-3, .grid-4 { display: grid; gap: 14px; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }

.card {
  background: linear-gradient(160deg, rgba(18,29,55,.95), rgba(13,21,40,.95));
  border: 1px solid rgba(87,116,182,.4);
  border-radius: 16px;
  padding: 18px;
}
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); }

.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fit,minmax(220px,1fr)); counter-reset: step; }
.steps li { counter-increment: step; background: rgba(17,28,53,.8); border: 1px solid rgba(100,131,199,.4); border-radius: 14px; padding: 14px; color: #d9e6ff; }
.steps li::before { content: 'STEP ' counter(step); display: block; font-size: 12px; color: #8fb2ff; margin-bottom: 4px; font-weight: 700; }

details { background: rgba(15,24,45,.8); border: 1px solid rgba(103,132,200,.4); border-radius: 12px; padding: 12px 14px; margin-bottom: 10px; }
summary { cursor: pointer; font-weight: 700; }

.pricing-hero { padding: 72px 0 22px; }
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(240px,1fr)); gap: 14px; }
.plan { position: relative; overflow: hidden; }
.plan .price { font-size: 30px; font-weight: 800; letter-spacing: -.02em; margin: 10px 0 8px; }
.plan .meta { color: var(--muted); font-size: 14px; }
.plan ul { margin: 10px 0 0; padding-left: 18px; color: #dce8ff; }
.plan.recommended { border-color: rgba(77,218,173,.8); box-shadow: 0 12px 30px rgba(59,190,146,.24); }
.plan.recommended::after { content: 'おすすめ'; position: absolute; top: 10px; right: 10px; font-size: 12px; background: #49d3ab; color: #06261f; padding: 4px 10px; border-radius: 999px; font-weight: 700; }

.legal-wrap { padding: 68px 0 50px; }
.legal-card { background: rgba(14,21,39,.92); border: 1px solid rgba(99,129,198,.45); border-radius: 16px; padding: 24px; }
.legal-card h1 { font-size: clamp(28px,4vw,42px); margin: 0 0 6px; }
.legal-card h2 { margin-top: 26px; font-size: 20px; }
.legal-card p, .legal-card li { color: #d3ddf4; }
.legal-card table { width: 100%; border-collapse: collapse; margin-top: 8px; }
.legal-card th, .legal-card td { border: 1px solid var(--line); padding: 10px; text-align: left; vertical-align: top; }
.legal-card th { background: rgba(60,92,156,.2); width: 28%; }

.note { color: #9fb0d9; font-size: 13px; }
.footer { padding: 26px 0 34px; color: #9cadcf; }
.footer nav { display: flex; flex-wrap: wrap; gap: 10px; }
.footer a { color: #9cadcf; text-decoration: none; }
.footer a:hover { color: #fff; }

@media (max-width: 640px) {
  .hero-shell { padding: 26px; }
  .header-row { min-height: 56px; }
  .nav { gap: 10px; }
}