:root {
  --rose: #d9468f;
  --rose-dark: #a51f66;
  --mint: #58b7a2;
  --sun: #f4b860;
  --ink: #24302c;
  --muted: #64736d;
  --line: #e5ece8;
  --soft: #fff2f8;
  --soft-mint: #edf9f5;
  --paper: #fffdfb;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.78;
  -webkit-text-size-adjust: 100%;
}
a { color: inherit; text-decoration: none; }
.wrap { width: min(100% - 28px, 1080px); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 253, 251, .96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}
.nav {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 10px;
  padding: 10px 0 9px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  font-weight: 800;
  color: var(--rose-dark);
  white-space: nowrap;
}
.brand-mark { width: 32px; height: 32px; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  padding: 0 2px 4px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.nav-links::-webkit-scrollbar { display: none; }
.nav-links a {
  flex: 0 0 auto;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  background: #fff;
  border: 1px solid var(--line);
}
.nav-links a[aria-current="page"],
.nav-links a:hover { color: var(--rose-dark); background: var(--soft); border-color: #f6cfe3; }
.hero {
  padding: 34px 0 30px;
  background:
    linear-gradient(120deg, rgba(255,242,248,.96), rgba(237,249,245,.88)),
    radial-gradient(circle at 85% 18%, rgba(244,184,96,.24), transparent 30%);
}
.hero-grid {
  display: grid;
  gap: 22px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--rose-dark);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 13px;
  font-weight: 800;
}
.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--mint);
}
h1 {
  margin: 16px 0 14px;
  font-size: 34px;
  line-height: 1.22;
  letter-spacing: 0;
}
.lead {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}
.hero-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255,255,255,.9);
  padding: 20px;
  box-shadow: 0 16px 34px rgba(165, 31, 102, .12);
}
.hero-card img { width: 78px; height: 78px; display: block; margin-bottom: 14px; }
.hero-card h2 { margin: 0 0 8px; font-size: 22px; }
.hero-card p { margin: 0; color: var(--muted); }
.section { padding: 44px 0; }
.section.alt { background: #fff; border-block: 1px solid var(--line); }
.section-head { margin-bottom: 18px; }
.section h2 { margin: 0 0 10px; font-size: 27px; line-height: 1.32; }
.section-head p { margin: 0; color: var(--muted); }
.feature-grid, .cards, .timeline, .steps, .faq-list {
  display: grid;
  gap: 12px;
}
.card, .step-item, .faq-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 18px;
}
.card h3, .step-item h3, .faq-item h3 { margin: 0 0 7px; font-size: 18px; line-height: 1.45; }
.card p, .step-item p, .faq-item p { margin: 0; color: var(--muted); }
.article-card {
  display: block;
  min-height: 100%;
}
.article-card:active,
.article-card:hover {
  border-color: #f1bdd9;
  background: #fff8fb;
}
.split {
  display: grid;
  gap: 18px;
}
.split-copy {
  border-left: 4px solid var(--mint);
  padding-left: 14px;
  color: var(--muted);
}
.check-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.check-list li {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  min-height: 44px;
  padding: 10px 13px;
  color: var(--ink);
  font-weight: 700;
}
.step-item { display: grid; grid-template-columns: 38px 1fr; gap: 12px; }
.step-number {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--soft);
  color: var(--rose-dark);
  font-weight: 900;
  font-size: 14px;
}
.note {
  border: 1px solid #f0d9a7;
  border-radius: 8px;
  background: #fff9eb;
  padding: 18px;
}
.note h2, .note h3 { margin: 0 0 8px; font-size: 21px; }
.note p { margin: 0; color: #75521c; }
.text-block {
  color: var(--muted);
}
.text-block p { margin: 0 0 1em; }
.faq-item h3::before { content: "Q. "; color: var(--rose-dark); }
.cta-band {
  padding: 40px 0;
  background: linear-gradient(120deg, var(--rose-dark), #4c8f80);
  color: #fff;
}
.cta-band h2 { margin: 0 0 8px; font-size: 27px; line-height: 1.35; }
.cta-band p { margin: 0; color: rgba(255,255,255,.86); }
.footer {
  padding: 26px 0;
  color: var(--muted);
  background: #fff;
}
.footer-grid {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  flex-wrap: wrap;
}
.age-notice {
  margin-top: 16px;
  padding: 10px 14px;
  border: 1px solid #dde8e2;
  border-radius: 8px;
  background: #fffaf2;
  color: #7a4a12;
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}
@media (min-width: 760px) {
  .wrap { width: min(1080px, calc(100% - 48px)); }
  .nav {
    min-height: 68px;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 0;
    gap: 18px;
  }
  .brand-mark { width: 34px; height: 34px; }
  .nav-links {
    justify-content: flex-end;
    flex-wrap: wrap;
    overflow: visible;
    padding: 0;
    gap: 4px;
  }
  .nav-links a {
    min-height: auto;
    padding: 8px 10px;
    border: 0;
    background: transparent;
    font-size: 14px;
  }
  .hero {
    min-height: 560px;
    display: grid;
    align-items: center;
    padding: 54px 0 42px;
  }
  .hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(280px, .72fr);
    gap: 34px;
    align-items: center;
  }
  h1 {
    max-width: 760px;
    font-size: clamp(42px, 5vw, 62px);
    line-height: 1.14;
  }
  .lead {
    max-width: 760px;
    font-size: 18px;
  }
  .hero-card {
    padding: 24px;
    box-shadow: 0 20px 48px rgba(165, 31, 102, .12);
  }
  .hero-card img { width: 92px; height: 92px; margin-bottom: 16px; }
  .section { padding: 62px 0; }
  .section-head { max-width: 760px; margin-bottom: 26px; }
  .section h2 { font-size: clamp(30px, 3vw, 38px); line-height: 1.25; }
  .feature-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .timeline { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-grid, .cards, .timeline, .steps, .faq-list { gap: 16px; }
  .card, .step-item, .faq-item, .note { padding: 22px; }
  .split {
    grid-template-columns: minmax(0, 1fr) minmax(260px, .72fr);
    gap: 22px;
    align-items: start;
  }
  .split-copy { padding-left: 18px; }
  .step-item { grid-template-columns: 44px 1fr; gap: 14px; }
  .step-number { width: 44px; height: 44px; font-size: 15px; }
  .text-block { max-width: 820px; }
  .cta-band { padding: 48px 0; }
  .cta-band h2 { font-size: 30px; }
  .cta-band p { max-width: 760px; }
  .footer { padding: 34px 0; }
  .footer-grid {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
  }
  .age-notice { font-size: 14px; }
}