:root {
  --brand: #1a3d6b;
  --brand-dark: #0a0f1a;
  --ice: #2a9fd6;
  --ice-soft: #6ccff6;
  --ink: #142033;
  --muted: #56647a;
  --bg: #f4f8fb;
  --card: #ffffff;
  --line: #dbe5ee;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.8;
}

a { color: var(--ice); }

.container { max-width: 960px; margin: 0 auto; padding: 0 20px; }

.site-header { background: #fff; border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 700; }
.brand img { width: 36px; height: 36px; border-radius: 9px; }
.nav a { margin-left: 16px; text-decoration: none; color: var(--muted); font-size: 14px; white-space: nowrap; }

.hero {
  background: radial-gradient(circle at 70% 20%, rgba(108,207,246,.22), transparent 55%),
              linear-gradient(180deg, var(--brand), var(--brand-dark));
  color: #fff;
  padding: 64px 0 56px;
}
.hero-inner { display: flex; gap: 40px; align-items: center; flex-wrap: wrap; }
.hero-text { flex: 1 1 360px; }
.hero h1 { font-size: clamp(28px, 5vw, 44px); line-height: 1.3; margin: 0 0 16px; }
.hero p { font-size: 17px; opacity: 0.92; margin: 0 0 24px; }
.hero-icon { width: 120px; height: 120px; border-radius: 27px; box-shadow: 0 10px 30px rgba(0,0,0,.35); }
.store-badge {
  display: inline-flex; flex-direction: column; justify-content: center; gap: 2px;
  padding: 12px 22px; border-radius: 14px; text-decoration: none;
  background: rgba(255,255,255,.14); color: #fff;
}
.store-badge-sub { font-size: 0.72rem; opacity: 0.85; }
.store-badge-main { font-size: 1.1rem; font-weight: 700; }

.section { padding: 56px 0; }
.section-title { font-size: 26px; margin: 0 0 24px; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 20px; }
.feature h3 { margin: 0 0 6px; font-size: 18px; color: var(--brand); }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }

.legal-content { max-width: 760px; }
.legal-content h2 { font-size: 19px; margin-top: 32px; color: var(--brand); }
.legal-updated { color: var(--muted); font-size: 14px; }
.faq dt { font-weight: 700; margin-top: 20px; }
.faq dd { margin: 4px 0 0; color: var(--muted); }

.site-footer { border-top: 1px solid var(--line); padding: 24px 0; color: var(--muted); font-size: 13px; }
.site-footer a { margin-right: 16px; }
.store-badge:hover { background: rgba(255,255,255,.24); }