:root {
  --ink: #172033;
  --muted: #5d687a;
  --navy: #183153;
  --teal: #2e7d6e;
  --aqua: #e5f4ef;
  --cream: #fffaf0;
  --amber: #f4b942;
  --line: #dfe5eb;
  --white: #fff;
  --shadow: 0 18px 50px rgba(24, 49, 83, .10);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: #fbfcfe; font-family: "Segoe UI", "Noto Sans JP", system-ui, sans-serif; line-height: 1.7; }
a { color: inherit; }
.wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(251,252,254,.94); border-bottom: 1px solid var(--line); backdrop-filter: blur(10px); }
.nav { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; text-decoration: none; }
.mark { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 11px; color: white; background: var(--navy); }
.nav-links { display: flex; align-items: center; gap: 22px; font-size: 14px; }
.nav-links a { text-decoration: none; }
.button { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; padding: 0 20px; border-radius: 999px; background: var(--navy); color: white; text-decoration: none; font-weight: 700; border: 1px solid var(--navy); }
.button.secondary { background: transparent; color: var(--navy); }
.hero { padding: 90px 0 70px; background: radial-gradient(circle at 80% 20%, #dff5ee 0, transparent 36%), linear-gradient(135deg, #fff 0, #f4f8fb 65%); }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 64px; align-items: center; }
.eyebrow { display: inline-flex; padding: 6px 12px; border-radius: 999px; background: var(--aqua); color: var(--teal); font-size: 13px; font-weight: 800; letter-spacing: .06em; }
h1 { margin: 18px 0; font-size: clamp(40px, 6vw, 68px); line-height: 1.1; letter-spacing: -.04em; }
h2 { margin: 0 0 14px; font-size: clamp(28px, 4vw, 42px); line-height: 1.25; }
h3 { margin: 0 0 8px; }
.lead { max-width: 680px; margin: 0; color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.micro { margin-top: 14px; color: var(--muted); font-size: 13px; }
.app-preview { padding: 18px; border: 1px solid var(--line); border-radius: 28px; background: white; box-shadow: var(--shadow); transform: rotate(1deg); }
.preview-bar { display: flex; gap: 6px; margin-bottom: 18px; }
.preview-bar i { width: 9px; height: 9px; border-radius: 50%; background: #d8dee7; }
.preview-card { padding: 20px; border-radius: 18px; background: #f4f7fa; }
.preview-card + .preview-card { margin-top: 12px; }
.preview-label { color: var(--muted); font-size: 12px; font-weight: 700; }
.preview-title { margin-top: 8px; font-size: 20px; font-weight: 800; }
.preview-tags { display: flex; gap: 6px; margin-top: 12px; }
.preview-tags span { padding: 4px 8px; border-radius: 999px; background: var(--aqua); color: var(--teal); font-size: 11px; }
.section { padding: 82px 0; }
.section.alt { background: white; }
.section-intro { max-width: 700px; margin-bottom: 36px; color: var(--muted); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { padding: 26px; border: 1px solid var(--line); border-radius: 22px; background: white; box-shadow: 0 8px 30px rgba(24,49,83,.05); }
.icon { width: 40px; height: 40px; display: grid; place-items: center; margin-bottom: 20px; border-radius: 13px; background: var(--aqua); color: var(--teal); font-weight: 900; }
.card p { margin: 0; color: var(--muted); }
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step { counter-increment: step; position: relative; padding: 28px; border-radius: 22px; background: var(--navy); color: white; }
.step::before { content: "0" counter(step); display: block; margin-bottom: 34px; color: var(--amber); font-size: 13px; font-weight: 900; }
.step p { color: #dbe5f0; }
.quote { padding: 38px; border-left: 6px solid var(--amber); border-radius: 0 22px 22px 0; background: var(--cream); font-size: 22px; font-weight: 700; }
.library { display: grid; grid-template-columns: 1.4fr .8fr; gap: 24px; }
.article-list { display: grid; gap: 12px; }
.article { display: block; padding: 20px; border: 1px solid var(--line); border-radius: 16px; background: white; text-decoration: none; }
.article small { color: var(--teal); font-weight: 800; }
.article strong { display: block; margin-top: 5px; }
.coming { padding: 28px; border-radius: 22px; background: var(--navy); color: white; }
.coming p { color: #dbe5f0; }
.ad-ready { margin-top: 24px; padding: 18px; border: 1px dashed #aab5c2; border-radius: 14px; color: var(--muted); font-size: 13px; text-align: center; }
.cta { padding: 48px; border-radius: 28px; background: linear-gradient(135deg, var(--teal), #214e55); color: white; text-align: center; }
.cta p { color: #e3f5ef; }
.footer { padding: 38px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.footer-grid { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.legal { max-width: 800px; padding: 72px 0; }
.legal h1 { font-size: 42px; }
.legal h2 { margin-top: 34px; font-size: 24px; }
@media (max-width: 820px) {
  .nav-links a:not(.button) { display: none; }
  .hero { padding-top: 60px; }
  .hero-grid, .grid-3, .steps, .library { grid-template-columns: 1fr; }
  .app-preview { transform: none; }
  .section { padding: 62px 0; }
  .cta { padding: 36px 22px; }
}
@media (max-width: 520px) {
  .wrap { width: min(100% - 24px, 1120px); }
  h1 { font-size: 42px; }
  .hero-actions .button { width: 100%; }
}