:root {
  --navy: #1f2466;
  --bg: #f3f5fb;
  --text: #0b1a33;
  --muted: #5b6475;
  --line: #d8ddea;
  --card: #ffffff;
  --radius: 18px;
  --shadow: 0 10px 28px rgba(15, 23, 42, 0.12);
  --max: 1100px;
}
* { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
}
html, body { margin: 0; padding: 0; }
body {
  font-family: "Hiragino Kaku Gothic ProN", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }

.wrap { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: saturate(180%) blur(10px);
  background: rgba(243, 245, 251, 0.88);
  border-bottom: 1px solid rgba(31, 36, 102, 0.08);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.logo { font-weight: 900; letter-spacing: 0.06em; color: var(--navy); }
.header-nav { display: flex; gap: 16px; color: var(--muted); font-size: 14px; }

.hero { padding: 72px 0 46px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 24px; align-items: center; }
.eyebrow { color: var(--navy); font-weight: 700; margin: 0 0 10px; }
h1 { margin: 0; font-size: clamp(32px, 5vw, 46px); line-height: 1.2; letter-spacing: .01em; }
.lead { color: var(--muted); margin: 16px 0 0; }

.section { padding: 48px 0; }
.section-alt { background: linear-gradient(180deg, rgba(31,36,102,.03) 0%, rgba(31,36,102,.06) 100%); }
h2 { margin: 0 0 18px; font-size: clamp(24px, 3vw, 34px); line-height: 1.3; }
h3 { margin: 0 0 8px; font-size: 18px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}
.grid { display: grid; gap: 14px; }
.cards-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.screenshots-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.cta-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.cta-row.center { justify-content: center; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  font-weight: 800;
  border: 1px solid transparent;
}
.btn-primary { background: var(--navy); color: #fff; }
.btn-ghost { background: #fff; color: var(--navy); border-color: rgba(31,36,102,.22); }

.list-check { margin: 0; padding-left: 20px; }
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.step span {
  width: 32px; height: 32px; border-radius: 999px;
  display: inline-grid; place-items: center;
  background: rgba(31,36,102,.1); color: var(--navy); font-weight: 900;
  margin-bottom: 10px;
}
.pricing-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.price-card.pro { border-color: rgba(31,36,102,.4); }
.price { font-size: 28px; font-weight: 900; margin: 2px 0 10px; color: var(--navy); }
.note { color: var(--muted); margin-top: 10px; }

.faq-list { display: grid; gap: 10px; }
details summary { cursor: pointer; font-weight: 700; }
details p { margin: 10px 0 0; color: var(--muted); }

.screenshots figure { margin: 0; }
figcaption { margin-top: 8px; color: var(--muted); font-size: 14px; text-align: center; }
.final-cta .card { text-align: center; }

.site-footer { border-top: 1px solid rgba(31,36,102,.1); background: #fff; }
.footer-inner { padding: 24px 0 30px; display: grid; gap: 10px; }
.footer-inner nav { display: flex; flex-wrap: wrap; gap: 12px; color: var(--muted); }
small { color: var(--muted); }

@media (max-width: 1024px) {
  .cards-5 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 800px) {
  .hero-grid, .steps, .pricing-grid, .screenshots-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 42px; }
  .header-nav { display: none; }
}