/* 導入ページ専用。色とフォント、ボタンは暮らし・プロ版の共通設定を使う。 */
.about-page { background: var(--bg); font-size: 16px; }
.about-header, .about-main, .about-footer { width: min(100% - 48px, 1000px); margin-inline: auto; }
.about-header { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 24px; padding-block: 24px; border-bottom: 1px solid var(--line); }
.about-header > a { font-size: 13px; }
.about-header .about-brand { color: var(--ink); font-size: 18px; font-weight: 700; text-decoration: none; }
.about-eyebrow { margin: 0 0 12px; color: var(--accent-ink); font-size: 13px; font-weight: 700; letter-spacing: .08em; }
.about-page h2 { margin: 0 0 16px; font-size: clamp(21px, 3vw, 28px); line-height: 1.6; }
.about-page h3 { margin: 0 0 12px; font-size: 22px; line-height: 1.6; }
.about-page .btn { width: fit-content; max-width: 100%; min-height: 48px; padding: 12px 20px; white-space: normal; text-align: center; }
.about-caption, .about-page figcaption { font-size: 12px; color: var(--muted); }
.about-section-head { margin-bottom: 28px; }
.about-section-head > p:last-child { margin-bottom: 0; }
.about-benefits, .about-steps, .about-scenes, .about-faq { padding-block: 36px 56px; }
.about-number { font-family: var(--serif); color: var(--accent); font-size: 36px; line-height: 1.4; }

/* 実画面は切り抜かず、画面の全体像を見せる。幅は親の区画に収める。 */
.about-page img { display: block; width: 100%; max-width: 100%; height: auto; border: 1px solid var(--line); border-radius: 8px; }
.about-hero { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); align-items: center; gap: 40px; padding: 64px 0 48px; }
.about-hero h1 { max-width: 16em; margin: 0 0 24px; font-family: var(--serif); font-size: clamp(32px, 4.2vw, 48px); line-height: 1.5; letter-spacing: .02em; }
.about-lead { margin: 0 0 28px; line-height: 1.9; }
.about-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.about-coverage { margin: 28px 0 0; font-size: 14px; color: var(--muted); }
.about-coverage strong { color: var(--ink); }
.about-hero-screen { min-width: 0; margin: 0; }
.about-hero-screen figcaption { margin-top: 8px; }

/* 機能は説明と実画面を一組にする。 */
.about-feature-list { display: grid; gap: 24px; list-style: none; margin: 0; padding: 0; }
.about-feature { display: grid; grid-template-columns: 48px minmax(0, 1fr) minmax(0, .9fr); align-items: start; gap: 24px; padding: 32px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.about-feature-primary { border-top: 4px solid var(--accent); }
.about-feature-body { min-width: 0; }
.about-feature .about-eyebrow { margin-bottom: 4px; }
.about-feature p:not(.about-eyebrow) { margin: 0 0 20px; line-height: 1.9; }
.about-feature-points { margin: 0 0 20px; padding-left: 1.3em; line-height: 1.9; }
.about-feature-points li + li { margin-top: 8px; }
.about-feature-screen { align-self: center; }

/* 手順と利用場面。狭い画面では読み順のまま縦に並べる。 */
.about-step-list, .about-scene-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin: 0; padding: 0; list-style: none; }
.about-step, .about-scene { min-width: 0; padding: 24px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.about-step-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.about-time { font-size: 12px; color: var(--accent-ink); background: var(--accent-soft); border-radius: 4px; padding: 4px 8px; }
.about-step h3, .about-scene h3 { font-size: 19px; }
.about-step p, .about-scene p:not(.about-eyebrow) { margin: 0 0 20px; line-height: 1.9; }
.about-step > a { display: inline-block; margin-top: 12px; padding-block: 8px; }
.about-scene-list { align-items: start; }
.about-page .about-phone-screen { width: min(100%, 220px); margin-inline: auto; }

/* FAQは標準のdetails/summaryで、キーボードでも開閉できる。 */
.about-faq details { border-top: 1px solid var(--line); }
.about-faq details:last-child { border-bottom: 1px solid var(--line); }
.about-faq summary { cursor: pointer; padding: 20px 8px; font-weight: 700; color: var(--accent-ink); overflow-wrap: anywhere; }
.about-faq summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.about-faq-answer { padding: 0 8px 20px; line-height: 1.9; }
.about-faq-answer p { margin: 0 0 12px; }
.about-faq-answer > :last-child { margin-bottom: 0; }
.about-source-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px 28px; padding-left: 1.3em; font-size: 13px; color: var(--muted); }

.about-monitor { padding: 40px; background: var(--accent-soft); border-radius: 12px; scroll-margin-top: 24px; }
.about-monitor p:not(.about-eyebrow) { max-width: 44em; margin: 0 0 20px; line-height: 1.9; }
.about-notice { padding-block: 32px 48px; color: var(--muted); }
.about-notice h2 { font-size: 14px; margin-bottom: 8px; }
.about-notice p { font-size: 12px; margin: 0 0 8px; }
.about-footer { padding-block: 24px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; font-size: 12px; color: var(--muted); }
.about-footer nav { display: flex; flex-wrap: wrap; gap: 12px 24px; }

@media (max-width: 800px) {
  .about-hero { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .about-hero-screen { width: min(100%, 480px); justify-self: center; }
  .about-feature { grid-template-columns: 48px minmax(0, 1fr); }
  .about-feature-screen { grid-column: 2; }
  .about-step-list, .about-scene-list { grid-template-columns: minmax(0, 1fr); }
  .about-step img { max-width: 480px; }
}

@media (max-width: 600px) {
  .about-header, .about-main, .about-footer { width: calc(100% - 32px); }
  .about-header { padding-block: 16px; }
  .about-hero { padding-block: 44px 28px; }
  .about-lead br { display: none; }
  .about-actions { flex-direction: column; }
  .about-actions .btn { width: 100%; }
  .about-feature { grid-template-columns: minmax(0, 1fr); gap: 16px; padding: 24px 20px; }
  .about-feature-screen { grid-column: 1; }
  .about-number { font-size: 28px; }
  .about-feature h3 { font-size: 20px; }
  .about-source-list { grid-template-columns: minmax(0, 1fr); }
  .about-monitor { padding: 28px 20px; }
}