:root { --ink: #17352d; --muted: #4f625c; --accent: #136b99; --green: #267957; --cream: #faf6ec; --line: #d9e2dd; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; color: var(--ink); background: #fff; font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif; font-size: 16px; line-height: 1.85; overflow-wrap: anywhere; }
a { color: var(--accent); text-underline-offset: .2em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
img { display: block; max-width: 100%; height: auto; }
h1, h2, h3 { line-height: 1.45; letter-spacing: -.025em; }
h2 { margin: 8px 0 28px; font-size: clamp(1.6rem, 3.5vw, 2.25rem); }
h3 { margin: 0 0 8px; font-size: 1.12rem; }
p { margin: 0 0 16px; }
figure { margin: 0; }
figcaption { margin-top: 16px; color: var(--muted); font-size: .75rem; line-height: 1.7; text-align: center; }
.wrap { width: min(100% - 48px, 1000px); margin-inline: auto; }
.skip-link { position: absolute; top: -100px; left: 16px; z-index: 1; padding: 10px 16px; background: #fff; }
.skip-link:focus { top: 8px; }
.site-header { border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 82px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-size: 1.05rem; font-weight: 750; text-decoration: none; white-space: nowrap; }
.brand img { border-radius: 9px; }
.site-header nav { display: flex; align-items: center; gap: 24px; font-size: .9rem; }
.site-header nav a { text-decoration: none; }
.header-download { color: var(--green); font-weight: 700; }
.hero { background: var(--cream); padding: 56px 0 44px; }
.hero-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 60px; align-items: center; }
.eyebrow { margin-bottom: 12px; color: var(--green); font-size: .85rem; font-weight: 700; letter-spacing: .03em; }
h1 { margin: 14px 0 22px; font-size: clamp(2rem, 4.6vw, 3.1rem); font-weight: 750; }
h1 span { color: var(--green); }
.lead { font-size: 1.1rem; }
.intro { max-width: 32em; color: var(--muted); font-size: .95rem; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 18px; padding: 14px 24px; margin: 6px 0 14px; border-radius: 8px; background: var(--green); color: #fff; font-size: 1rem; font-weight: 700; text-decoration: none; box-shadow: 0 4px 0 rgba(23, 53, 45, .08); }
.button:hover { background: #1e6045; text-decoration: none; }
.download-note { color: var(--muted); font-size: .8rem; line-height: 1.8; }
.requirement { margin: 20px 0 0; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: .8rem; }
.hero-visual { max-width: 290px; justify-self: center; padding: 22px 12px 0; background: #e3ede5; border-radius: 160px 160px 12px 12px; }
.phone { border: 1px solid #cad5ce; border-radius: 24px; box-shadow: 0 12px 32px rgba(23, 53, 45, .12); }
.hero-visual figcaption { padding-inline: 8px; margin-bottom: 14px; }
.page-nav { display: flex; justify-content: space-between; gap: 16px; padding-block: 20px; border-bottom: 1px solid var(--line); font-size: .9rem; }
.page-nav a { text-decoration: none; }
.page-nav span { margin-left: 12px; }
.section { padding-block: 64px; }
.story-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 64px; align-items: center; }
.story-point { display: flex; gap: 20px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.story-point:first-child { padding-top: 0; }
.story-point:last-child { border-bottom: 0; }
.story-point p { margin: 0; color: var(--muted); font-size: .95rem; }
.number { color: var(--green); font-size: .85rem; font-weight: 750; padding-top: 4px; }
.timeline-visual { max-width: 240px; justify-self: center; }
.notice { margin-top: 36px; padding: 20px 24px; border-left: 3px solid var(--accent); background: #edf5f9; font-size: .85rem; }
.notice strong { display: block; margin-bottom: 6px; }
.notice p { margin: 0; color: var(--muted); }
.setup-section { background: #f1f6f2; }
.section-intro { max-width: 43em; color: var(--muted); }
.steps { list-style: none; padding: 0; counter-reset: setup; margin: 32px 0; display: grid; gap: 26px; }
.steps li { counter-increment: setup; position: relative; padding-left: 62px; }
.steps li::before { content: counter(setup); position: absolute; left: 0; top: 0; display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; color: #fff; background: var(--green); font-weight: 700; }
.steps p { margin: 0; color: var(--muted); max-width: 48em; font-size: .95rem; }
.text-link { font-size: .9rem; font-weight: 650; }
.privacy-section { display: grid; grid-template-columns: 1fr 1.2fr; gap: 60px; border-bottom: 1px solid var(--line); }
.privacy-section p:not(.eyebrow) { color: var(--muted); font-size: .95rem; }
.questions dl { margin: 0; }
.questions dl > div { padding: 24px 0; border-top: 1px solid var(--line); }
.questions dt { font-weight: 700; }
.questions dd { margin: 10px 0 0; color: var(--muted); font-size: .95rem; max-width: 54em; }
.final-section { padding: 42px 32px; background: var(--cream); border-radius: 16px; text-align: center; }
.final-section h2 { margin-bottom: 14px; }
.related { padding-block: 48px; }
.related h2 { font-size: 1rem; margin-bottom: 16px; }
.related a { display: block; margin-block: 12px; font-size: .9rem; }
.site-footer { padding-block: 28px; border-top: 1px solid var(--line); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-top: 16px; font-size: .85rem; }
.site-footer p { margin: 20px 0 0; color: var(--muted); font-size: .75rem; }
@media (max-width: 700px) {
  .wrap { width: min(100% - 40px, 540px); }
  .header-inner { min-height: 70px; gap: 12px; }
  .site-header nav { gap: 14px; font-size: .8rem; }
  .site-header .header-download { display: none; }
  .hero { padding-block: 32px; }
  .hero-grid, .story-grid, .privacy-section { grid-template-columns: 1fr; gap: 30px; }
  h1 { font-size: clamp(1.8rem, 7.5vw, 2.5rem); }
  .lead { font-size: 1rem; }
  .hero-visual { max-width: 240px; }
  .page-nav { flex-wrap: wrap; justify-content: flex-start; gap: 8px 20px; font-size: .8rem; }
  .page-nav span { margin-left: 4px; }
  .section { padding-block: 40px; }
  .story-grid { gap: 22px; }
  .story-point { gap: 16px; }
  .timeline-visual { max-width: 220px; }
  .notice { margin-top: 24px; padding: 18px; }
  .steps li { padding-left: 52px; }
  .privacy-section { gap: 8px; }
  .privacy-section h2 { margin-bottom: 16px; }
  .final-section { padding: 32px 20px; }
  .button { max-width: 100%; padding-inline: 18px; gap: 12px; font-size: .95rem; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }