/*
 * 株式会社竹忠 ホームページ共通スタイル
 * - ビルド不要の静的CSSです。
 * - スマホからPCまで同じHTMLで見やすくなるよう、レスポンシブ対応を入れています。
 */
:root {
  --color-base: #0f172a;
  --color-text: #1f2937;
  --color-muted: #64748b;
  --color-primary: #1d4ed8;
  --color-primary-dark: #0f2f66;
  --color-accent: #10b981;
  --color-soft: #f5f8fc;
  --color-soft-blue: #eaf2ff;
  --color-line: #dbe4ef;
  --color-white: #ffffff;
  --shadow-sm: 0 10px 30px rgba(15, 23, 42, .08);
  --shadow-md: 0 18px 50px rgba(15, 23, 42, .14);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --container: 1120px;
  --header-height: 74px;
}

/* 基本設定：日本語が読みやすい行間と余白にしています。 */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--color-text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Yu Gothic UI", Meiryo, sans-serif;
  line-height: 1.75;
  background: var(--color-white);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
p { margin: 0 0 1em; }
h1, h2, h3 { color: var(--color-base); line-height: 1.35; letter-spacing: .02em; margin: 0 0 .65em; }
h1 { font-size: clamp(2rem, 4.2vw, 4.4rem); font-weight: 850; }
h2 { font-size: clamp(1.6rem, 3vw, 2.45rem); font-weight: 800; }
h3 { font-size: 1.15rem; font-weight: 780; }
.container { width: min(calc(100% - 32px), var(--container)); margin: 0 auto; }
.narrow { width: min(calc(100% - 32px), 860px); }
.center { text-align: center; }
.skip-link { position: absolute; left: -999px; top: 8px; z-index: 999; background: var(--color-base); color: #fff; padding: .6rem 1rem; border-radius: 999px; }
.skip-link:focus { left: 8px; }

/* ヘッダー：スクロール時も問い合わせ導線を見失わないよう固定します。 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .92);
  border-bottom: 1px solid rgba(219, 228, 239, .82);
  backdrop-filter: blur(14px);
}
.header-inner { min-height: var(--header-height); display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 220px; }
.brand img { width: 176px; height: auto; }
.brand-copy { display: none; }
.site-nav { display: flex; align-items: center; gap: 6px; font-weight: 700; color: #334155; }
.site-nav a { padding: .65rem .8rem; border-radius: 999px; transition: background .2s, color .2s; }
.site-nav a:hover, .site-nav a.is-active { background: var(--color-soft-blue); color: var(--color-primary); }
.nav-toggle { display: none; }

/* ボタン：主要CTAは塗り、補助CTAは枠線で役割を分けます。 */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  min-height: 48px;
  padding: .75rem 1.3rem;
  border: 1px solid var(--color-primary);
  border-radius: 999px;
  background: var(--color-primary);
  color: #fff;
  font-weight: 800;
  box-shadow: 0 14px 30px rgba(29, 78, 216, .22);
  transition: transform .2s, box-shadow .2s, background .2s;
}
.button:hover { transform: translateY(-2px); box-shadow: 0 18px 34px rgba(29, 78, 216, .28); }
.button-outline { background: #fff; color: var(--color-primary); box-shadow: none; }
.button-invert { background: #fff; color: var(--color-primary-dark); border-color: #fff; box-shadow: none; }
.button-small { min-height: 40px; padding: .5rem 1rem; font-size: .92rem; }
.text-link { display: inline-flex; align-items: center; color: var(--color-primary); font-weight: 800; }
.text-link::after { content: "→"; margin-left: .35rem; }

/* ヒーロー：ファーストビューで価値、対象、CTAを伝えます。 */
.hero { position: relative; overflow: hidden; padding: clamp(56px, 8vw, 104px) 0; background: linear-gradient(135deg, #f6f9ff 0%, #eef6ff 44%, #ffffff 100%); }
.hero::before { content: ""; position: absolute; inset: auto -120px -180px auto; width: 520px; height: 520px; background: radial-gradient(circle, rgba(16, 185, 129, .18), rgba(16, 185, 129, 0) 65%); }
.hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr); gap: 48px; align-items: center; }
.lead { font-size: clamp(1.04rem, 1.8vw, 1.25rem); color: #334155; }
.eyebrow { display: inline-flex; align-items: center; gap: .45rem; color: var(--color-primary); font-weight: 850; letter-spacing: .08em; text-transform: uppercase; font-size: .84rem; margin-bottom: .7rem; }
.eyebrow::before { content: ""; width: 28px; height: 2px; border-radius: 999px; background: currentColor; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.hero-actions.centered { justify-content: center; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; padding: 0; margin: 26px 0 0; }
.hero-points li, .deliverables span, .tag-cloud span, .skill-list span { background: #fff; color: #334155; border: 1px solid var(--color-line); border-radius: 999px; padding: .45rem .75rem; font-weight: 700; box-shadow: var(--shadow-sm); }
.hero-panel { display: flex; justify-content: center; }
.screen-card { width: min(100%, 430px); padding: 24px; border-radius: var(--radius-lg); background: rgba(255,255,255,.9); border: 1px solid #dbeafe; box-shadow: var(--shadow-md); }
.screen-top { display: flex; gap: 8px; margin-bottom: 22px; }
.screen-top span { width: 11px; height: 11px; border-radius: 999px; background: #cbd5e1; }
.screen-top span:first-child { background: #60a5fa; }
.screen-top span:nth-child(2) { background: #34d399; }
.diag-row { display: grid; grid-template-columns: 86px 1fr; gap: 12px; align-items: start; padding: 12px 0; border-top: 1px solid var(--color-line); }
.diag-row strong { color: var(--color-primary-dark); }
.diag-row span { color: #475569; }

/* 下層ヒーロー：ページの目的とCTAを短く示します。 */
.sub-hero { padding: clamp(54px, 8vw, 96px) 0; text-align: center; background: linear-gradient(135deg, #f8fbff, #eef6ff); border-bottom: 1px solid var(--color-line); }
.sub-hero .lead { max-width: 780px; margin-left: auto; margin-right: auto; }

/* 汎用セクション：読みやすい余白と見出しを揃えます。 */
.section { padding: clamp(56px, 8vw, 96px) 0; }
.section-soft { background: var(--color-soft); }
.section-dark { background: #0f2744; color: #dce8f8; }
.section-dark h2, .section-dark h3 { color: #fff; }
.section-heading { max-width: 790px; margin-bottom: 34px; }
.section-heading.split { max-width: none; display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; }
.section-heading.light p { color: #dce8f8; }

/* カード：課題、サービス、事例を同じ文法で見せます。 */
.card-grid { display: grid; gap: 20px; }
.card-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card, .check-card, .price-card, .case-card, .company-box, .profile-card, .form-note, .contact-form {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.card p, .check-card p, .price-card p, .case-card p { color: #475569; }
.card h3::before, .check-card h3::before { content: ""; display: block; width: 32px; height: 4px; border-radius: 999px; background: var(--color-accent); margin-bottom: 14px; }
.service-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.service-item { display: grid; grid-template-columns: 58px 1fr; gap: 6px 16px; padding: 20px; border-radius: var(--radius-md); background: #fff; border: 1px solid var(--color-line); box-shadow: var(--shadow-sm); transition: transform .2s, border-color .2s; }
.service-item:hover { transform: translateY(-2px); border-color: #93c5fd; }
.service-item span { grid-row: span 2; display: grid; place-items: center; width: 48px; height: 48px; border-radius: 16px; background: var(--color-soft-blue); color: var(--color-primary); font-weight: 900; }
.service-item strong { color: var(--color-base); font-size: 1.08rem; }
.service-item em { color: var(--color-muted); font-style: normal; }

/* 料金表：スマホでは横スクロールできるようにします。 */
.price-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.price-grid.compact { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.price-card { position: relative; overflow: hidden; }
.price-card.featured { border-color: #93c5fd; box-shadow: var(--shadow-md); }
.price-card.featured::before { content: "おすすめ"; position: absolute; top: 16px; right: -34px; transform: rotate(35deg); background: var(--color-primary); color: #fff; font-size: .78rem; font-weight: 800; padding: .25rem 2.5rem; }
.price { color: var(--color-primary); font-size: clamp(1.65rem, 3vw, 2.2rem); font-weight: 900; margin-bottom: .35rem; }
.table-wrap { overflow-x: auto; border: 1px solid var(--color-line); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow-sm); }
.price-table { width: 100%; border-collapse: collapse; min-width: 780px; }
.price-table th, .price-table td { padding: 16px; border-bottom: 1px solid var(--color-line); text-align: left; vertical-align: top; }
.price-table thead th { background: #edf5ff; color: var(--color-primary-dark); }
.price-table tbody tr:last-child th, .price-table tbody tr:last-child td { border-bottom: 0; }

/* ダーク背景の事例カード：デモURLを出さずに技術実績として見せます。 */
.case-card { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.16); color: #dce8f8; }
.case-card span, .case-kicker { display: inline-flex; color: #93c5fd; font-weight: 850; font-size: .86rem; margin-bottom: .65rem; }
.case-card p { color: #dce8f8; }
.case-detail { background: #fff; border: 1px solid var(--color-line); border-radius: var(--radius-lg); padding: clamp(24px, 4vw, 42px); box-shadow: var(--shadow-sm); }
.section-soft .case-detail { background: #fff; }
.feature-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-top: 24px; }
.feature-grid div { padding: 18px; border-radius: 16px; background: var(--color-soft); border: 1px solid var(--color-line); }
.feature-grid strong { display: block; color: var(--color-primary-dark); margin-bottom: .4rem; }
.feature-grid span { color: #475569; }
.notice { margin-top: 22px; padding: 14px 16px; border-radius: 14px; background: #fff7ed; border: 1px solid #fed7aa; color: #9a3412; }

/* レイアウト補助：2カラム、信頼情報、プロフィールなどです。 */
.two-col { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 36px; align-items: start; }
.trust-grid, .profile-grid, .form-layout { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); gap: 28px; align-items: start; }
.company-box dl { display: grid; grid-template-columns: 100px 1fr; gap: 10px 18px; margin: 0; }
.company-box dt { color: var(--color-muted); font-weight: 800; }
.company-box dd { margin: 0; }
.note-list { display: grid; gap: 14px; }
.note-list div { padding: 18px; border-radius: var(--radius-md); background: #fff; border: 1px solid var(--color-line); box-shadow: var(--shadow-sm); }
.note-list strong { display: block; color: var(--color-primary-dark); }
.note-list span { color: #475569; }
.bullet-list { margin: 0; padding-left: 1.2rem; color: #475569; }
.bullet-list li + li { margin-top: .55rem; }
.bullet-list.simple { padding-left: 1.1rem; }
.step-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; }
.step-list li { display: grid; grid-template-columns: 72px 1fr; gap: 20px; align-items: start; padding: 24px; border-radius: var(--radius-md); border: 1px solid var(--color-line); background: #fff; box-shadow: var(--shadow-sm); }
.step-list span { display: grid; place-items: center; width: 56px; height: 56px; border-radius: 18px; background: var(--color-primary); color: #fff; font-weight: 900; }
.compact-step { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.compact-step li { grid-template-columns: 62px 1fr; }
.check-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.deliverables, .tag-cloud, .skill-list { display: flex; flex-wrap: wrap; gap: 10px; }
.profile-card { text-align: center; position: sticky; top: calc(var(--header-height) + 24px); }
.profile-initial { width: 112px; height: 112px; display: grid; place-items: center; margin: 0 auto 18px; border-radius: 36px; background: linear-gradient(135deg, var(--color-primary), #0f766e); color: #fff; font-size: 3.4rem; font-weight: 900; }
.timeline { display: grid; gap: 16px; }
.timeline div { display: grid; grid-template-columns: 170px 1fr; gap: 18px; padding: 18px; border-radius: var(--radius-md); background: #fff; border: 1px solid var(--color-line); box-shadow: var(--shadow-sm); }
.timeline span { color: var(--color-primary); font-weight: 900; }
.policy h2 { margin-top: 2rem; font-size: 1.35rem; }
.policy h2:first-child { margin-top: 0; }
.policy-date { margin-top: 2.2rem; color: var(--color-muted); }

/* フォーム：入力欄を大きくし、エラーを分かりやすく表示します。 */
.contact-form { display: grid; gap: 18px; }
.field { display: grid; gap: 7px; }
.field label { font-weight: 800; color: var(--color-base); }
.field label span { color: #dc2626; font-size: .86rem; }
.field input, .field select, .field textarea { width: 100%; border: 1px solid #cbd5e1; border-radius: 14px; padding: .86rem .95rem; font: inherit; background: #fff; }
.field textarea { resize: vertical; min-height: 180px; }
.two-fields { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.agree { display: flex; gap: 10px; align-items: flex-start; font-weight: 700; }
.agree input { margin-top: .45rem; }
.agree a { color: var(--color-primary); text-decoration: underline; }
.form-submit { width: fit-content; border: 0; cursor: pointer; }
.form-errors { padding: 16px; border-radius: var(--radius-sm); background: #fef2f2; border: 1px solid #fecaca; color: #991b1b; }
.form-errors ul { margin: .5rem 0 0; padding-left: 1.2rem; }
.field-trap { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* CTA帯：ページ下部で相談行動を促します。 */
.cta-band { padding: clamp(42px, 7vw, 74px) 0; background: linear-gradient(135deg, #1d4ed8, #0f766e); color: #e0f2fe; }
.cta-band h2 { color: #fff; }
.cta-band-inner { display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.cta-band .eyebrow { color: #bfdbfe; }

/* フッター：補助導線と会社情報をまとめます。 */
.site-footer { background: #0b1324; color: #cbd5e1; padding: 48px 0 20px; }
.site-footer h2 { color: #fff; font-size: 1rem; margin-bottom: .8rem; }
.footer-grid { display: grid; grid-template-columns: 1.3fr .9fr 1fr 1fr; gap: 28px; }
.footer-brand img { margin-bottom: 14px; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li + li { margin-top: .35rem; }
.footer-links a:hover, .footer-bottom a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 18px; border-top: 1px solid rgba(255,255,255,.12); margin-top: 28px; padding-top: 18px; color: #94a3b8; }

/* アクセシビリティ：フォーカス時に操作位置が分かるようにします。 */
:focus-visible { outline: 3px solid rgba(29, 78, 216, .35); outline-offset: 3px; }

/* タブレット幅：カード数と余白を調整します。 */
@media (max-width: 980px) {
  .hero-grid, .two-col, .trust-grid, .profile-grid, .form-layout { grid-template-columns: 1fr; }
  .card-grid.three, .price-grid, .price-grid.compact, .check-grid, .feature-grid, .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .profile-card { position: static; }
}

/* スマホ幅：メニューを開閉式にし、表やカードを1列にします。 */
@media (max-width: 760px) {
  :root { --header-height: 66px; }
  .container { width: min(calc(100% - 24px), var(--container)); }
  .header-inner { min-height: var(--header-height); }
  .brand img { width: 148px; }
  .nav-toggle { display: inline-grid; gap: 4px; place-items: center; border: 1px solid var(--color-line); background: #fff; color: var(--color-base); border-radius: 14px; padding: .45rem .55rem; font: inherit; font-weight: 800; cursor: pointer; }
  .nav-toggle span { display: block; width: 22px; height: 2px; background: var(--color-base); border-radius: 999px; }
  .nav-toggle em { font-style: normal; font-size: .72rem; line-height: 1; }
  .site-nav { position: fixed; inset: var(--header-height) 12px auto 12px; display: none; flex-direction: column; align-items: stretch; gap: 4px; padding: 12px; border: 1px solid var(--color-line); border-radius: 18px; background: #fff; box-shadow: var(--shadow-md); }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: .9rem 1rem; }
  .hero { padding-top: 46px; }
  .hero-actions, .cta-band-inner { flex-direction: column; align-items: stretch; }
  .button { width: 100%; }
  .section-heading.split { display: block; }
  .card-grid.three, .price-grid, .price-grid.compact, .check-grid, .feature-grid, .footer-grid, .service-list, .compact-step { grid-template-columns: 1fr; }
  .step-list li, .timeline div { grid-template-columns: 1fr; }
  .two-fields { grid-template-columns: 1fr; }
  .company-box dl { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}

/* 印刷時：背景を落として読みやすくします。 */
@media print {
  .site-header, .site-footer, .cta-band, .nav-toggle, .button { display: none !important; }
  body { color: #000; background: #fff; }
  .section, .sub-hero { padding: 18px 0; }
  .card, .price-card, .company-box { box-shadow: none; }
}

/*
 * フッターロゴ視認性改善
 * - 暗いフッター背景の上でも、ロゴ内の会社名が読めるように白いロゴプレートを追加します。
 * - .site-footer 配下に限定しているため、ヘッダーや本文内のロゴ表示には影響しません。
 */
.site-footer .footer-brand {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  max-width: 100%;
  padding: 10px 14px;
  margin-bottom: 14px;
  border-radius: 18px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  box-shadow: 0 14px 34px rgba(0, 0, 0, .20), inset 0 0 0 1px rgba(15, 23, 42, .06);
  transition: transform .2s, box-shadow .2s;
}

/* ロゴにホバーした時だけ少し浮かせ、クリックできることを自然に伝えます。 */
.site-footer .footer-brand:hover,
.site-footer .footer-brand:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, .26), inset 0 0 0 1px rgba(29, 78, 216, .16);
}

/* 既存の img 余白指定を上書きし、白いプレート内でロゴが中央に収まるようにします。 */
.site-footer .footer-brand img {
  width: 176px;
  max-width: 100%;
  height: auto;
  margin: 0;
}

/* スマホではプレートが大きく見えすぎないように少しだけ縮めます。 */
@media (max-width: 760px) {
  .site-footer .footer-brand {
    padding: 8px 12px;
    border-radius: 16px;
  }

  .site-footer .footer-brand img {
    width: 164px;
  }
}



/* 新規ページ・問い合わせフォーム追加項目用スタイル
 * - 既存デザインを崩さず、紹介導線と複数選択フォームを読みやすくします。
 */
.plan-main { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.range-note strong { color: #7c2d12; }
.referral-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.referral-cta .hero-actions { margin-top: 0; justify-content: flex-end; }
.choice-field {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 18px;
  background: #fbfdff;
}
.choice-field legend {
  padding: 0 .45rem;
  color: var(--color-base);
  font-weight: 800;
}
.choice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.check-option {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  min-height: 44px;
  padding: .62rem .7rem;
  border: 1px solid #dbe4ef;
  border-radius: 14px;
  background: #fff;
  font-weight: 700;
}
.check-option input { margin-top: .32rem; }
.faq-list { display: grid; gap: 12px; }
.faq-list details {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 16px 18px;
  box-shadow: var(--shadow-sm);
}
.faq-list summary { cursor: pointer; font-weight: 800; color: var(--color-primary-dark); }
.faq-list details p { margin-top: .8rem; }
.demo-screen-placeholder {
  display: grid;
  place-items: center;
  min-height: 180px;
  margin: 24px 0;
  border: 1px dashed #93c5fd;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #f8fbff, #eef6ff);
  color: var(--color-primary-dark);
  text-align: center;
}
.demo-screen-placeholder span { display: block; font-size: 1.15rem; font-weight: 900; }
.demo-screen-placeholder small { display: block; color: #64748b; font-weight: 700; }
.policy a { color: var(--color-primary); text-decoration: underline; }

/* ナビゲーション文言が長くなったため、PC幅では少し詰めて表示します。 */
.site-nav a { padding-left: .68rem; padding-right: .68rem; }

@media (max-width: 980px) {
  .plan-main, .referral-cta { grid-template-columns: 1fr; }
  .referral-cta .hero-actions { justify-content: flex-start; }
}

@media (max-width: 760px) {
  .choice-grid { grid-template-columns: 1fr; }
  .referral-cta .button { width: 100%; }
}


/* 問い合わせフォームの複数選択チェックボックス調整
 * - 通常入力欄用の width:100% がチェックボックスに効いて余白が広がる問題を防ぎます。
 * - 選択肢ラベルは必須マーク用の赤色指定に巻き込まれないよう、通常文字色に戻します。
 */
.choice-field .choice-grid {
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
}
.choice-field .check-option {
  align-items: center;
  gap: 10px;
  min-height: auto;
  padding: .72rem .85rem;
  line-height: 1.45;
}
.choice-field .check-option input[type="checkbox"] {
  width: auto;
  min-width: 1rem;
  height: 1rem;
  margin: 0;
  flex: 0 0 auto;
}
.choice-field .check-option span {
  color: var(--color-base);
  font-size: .95rem;
  font-weight: 700;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

@media (max-width: 760px) {
  .choice-field .choice-grid { grid-template-columns: 1fr; }
}


/* 具体例セクション
 * - 見込み客が自社の状況と照らし合わせやすいよう、番号付きカードと詳細カードを追加します。
 * - スマホでは1列表示にし、長い説明も読みやすい余白で表示します。
 */
.example-section .section-heading p { color: #475569; }
.example-summary-grid { margin-top: 24px; }
.example-summary-card {
  position: relative;
  padding-top: 64px;
}
.example-summary-card h3::before { display: none; }
.example-number,
.quick-example-card span,
.example-card-head span,
.diagnosis-case-item summary span,
.compact-step article span {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-primary), #0f766e);
  color: #fff;
  font-weight: 900;
  letter-spacing: .03em;
}
.example-summary-card .example-number {
  position: absolute;
  top: 20px;
  left: 24px;
}
.example-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}
.diagnosis-case-list {
  display: grid;
  gap: 20px;
}
.diagnosis-case-card,
.diagnosis-case-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.example-card-head {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 22px 24px 0;
}
.example-card-head h3 {
  margin: 0;
  font-size: clamp(1.15rem, 2vw, 1.45rem);
}
.diagnosis-case-body {
  display: grid;
  gap: 18px;
  padding: 22px 24px 24px;
}
.diagnosis-case-body strong {
  display: block;
  margin-bottom: .45rem;
  color: var(--color-primary-dark);
  font-size: .98rem;
}
.diagnosis-case-body blockquote {
  margin: 0;
  padding: 14px 16px;
  border-left: 4px solid var(--color-primary);
  border-radius: 12px;
  background: #f8fbff;
  color: #334155;
  font-weight: 700;
}
.quick-example-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.quick-example-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.quick-example-card h3 { margin: 0 0 .45rem; }
.quick-example-card p { margin: 0; color: #475569; }
.diagnosis-accordion {
  display: grid;
  gap: 14px;
}
.diagnosis-case-item summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 22px;
  cursor: pointer;
  list-style: none;
}
.diagnosis-case-item summary::-webkit-details-marker { display: none; }
.diagnosis-case-item summary::after {
  content: "+";
  margin-left: auto;
  color: var(--color-primary);
  font-size: 1.4rem;
  font-weight: 900;
}
.diagnosis-case-item[open] summary::after { content: "−"; }
.diagnosis-case-item .diagnosis-case-body {
  border-top: 1px solid var(--color-line);
  background: #fbfdff;
}

@media (max-width: 760px) {
  .example-summary-card { padding-top: 60px; }
  .quick-example-grid { grid-template-columns: 1fr; }
  .quick-example-card,
  .example-card-head,
  .diagnosis-case-item summary {
    align-items: flex-start;
  }
  .example-actions .button { width: 100%; }
  .diagnosis-case-body { padding: 18px; }
}

/* ヘッダー導線追加
 * - 「事例」を「デモ・開発事例」に明確化し、診断の利用イメージを見る「具体例」を追加します。
 * - PC幅ではリンクが増えても1行に収まりやすいよう、ヘッダー内の余白だけを少し詰めます。
 */
@media (min-width: 761px) {
  .site-nav {
    gap: 3px;
    font-size: .93rem;
  }
  .site-nav a {
    padding-left: .52rem;
    padding-right: .52rem;
  }
}

/* 中間幅ではロゴとメニューの干渉を避けるため、ヘッダーだけを少しコンパクトにします。 */
@media (min-width: 761px) and (max-width: 1120px) {
  .header-inner {
    gap: 14px;
  }
  .brand img {
    width: 158px;
  }
  .site-nav {
    font-size: .9rem;
  }
  .site-nav a {
    padding-left: .42rem;
    padding-right: .42rem;
  }
}

/* 新価格体系：6件の診断カードと5件の月額プランを、PCでもスマホでも読みやすく並べます。 */
.price-grid-six { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.plan-grid-five { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.plan-grid-five .price-card { min-width: 0; }
@media (max-width: 1180px) {
  .plan-grid-five { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 980px) {
  .price-grid-six, .plan-grid-five { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .price-grid-six, .plan-grid-five { grid-template-columns: 1fr; }
}