/* A案専用の補助ナビ。公式ヘッダーの構造は変えない。 */
.concept-a .a-quick-nav {
  position: sticky;
  top: 64px;
  z-index: 88;
  background: rgba(245, 249, 244, .97);
  border-bottom: 1px solid #cbdccb;
  box-shadow: 0 6px 20px rgba(17, 54, 30, .06);
  backdrop-filter: blur(14px);
}

.concept-a .a-quick-nav-inner {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: clamp(12px, 3vw, 48px);
}
.concept-a .a-quick-nav a {
  display: inline-flex;
  min-height: 56px;
  align-items: center;
  gap: 9px;
  padding-inline: 8px;
  border-bottom: 2px solid transparent;
  color: #244b31;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}
.concept-a .a-quick-nav a:hover,
.concept-a .a-quick-nav a:focus-visible { color: #147642; border-color: #258b50; }
.concept-a .a-quick-nav a:focus-visible { outline: 2px solid #258b50; outline-offset: -4px; }
.concept-a main section[id] { scroll-margin-top: 128px; }
.concept-a #contact-form { scroll-margin-top: 128px; }

.concept-a .a-section-next {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px 28px;
  margin-top: 34px;
  padding: 24px 0 0;
  border-top: 1px solid #afc7b2;
}
.concept-a .a-section-next p { margin: 0; max-width: 52ch; color: #3c5b43; line-height: 1.7; }
.concept-a .a-section-next a {
  display: inline-flex;
  align-items: center;
  gap: 24px;
  min-height: 48px;
  padding: 10px 16px;
  border: 1px solid #286e41;
  color: #14582e;
  font-weight: 700;
  text-decoration: none;
}
.concept-a .a-section-next a:hover { background: #dcefe0; }
.concept-a .a-section-next a:focus-visible { outline: 3px solid #286e41; outline-offset: 3px; }
.concept-a .case-source-link { display: inline-block; margin-top: 10px; color: #17643a; font-weight: 700; text-decoration: underline; text-underline-offset: 4px; }
.concept-a .case-source-link:focus-visible { outline: 3px solid #286e41; outline-offset: 3px; }

.concept-a .scene-detail-point,
.concept-a .scene-detail-example { display: none; }
.concept-a .experience-stage { overflow: clip; }
.concept-a .has-horizontal-slides .scene-detail-point {
  display: grid;
  gap: 8px;
  min-width: min(100%, 320px);
  margin-top: 32px;
  padding: 16px 20px;
  border-left: 3px solid #9ce3ac;
  background: rgba(198, 248, 208, .1);
}
.concept-a .scene-detail-point small { color: #a9dfb5; font-size: 11px; font-weight: 700; }
.concept-a .scene-detail-point strong { color: #f2fff2; font-size: clamp(15px, 2vw, 20px); line-height: 1.5; }
.concept-a .has-horizontal-slides .scene-detail-example {
  display: block;
  width: min(100%, 490px);
  margin-top: 18px;
  padding: 17px 20px;
  border: 1px solid rgba(171, 224, 182, .32);
  background: rgba(9, 43, 25, .28);
}
.concept-a .scene-detail-example span { color: #a9dfb5; font-size: 11px; font-weight: 700; }
.concept-a .has-horizontal-slides .scene-detail-example p { margin-top: 8px; color: #f0f9f1; font-size: 15px; line-height: 1.65; }

@media (max-width: 600px) {
  .concept-a .a-quick-nav-inner { width: 100%; justify-content: space-around; gap: 0; padding-inline: 8px; }
  .concept-a .a-quick-nav a { min-height: 50px; gap: 3px; padding-inline: 5px; font-size: 11px; }
  .concept-a .a-quick-nav a span { font-size: 10px; }
  .concept-a .a-section-next a { width: 100%; justify-content: space-between; }
  .concept-a .mode-switch-floating {
    right: 12px;
    bottom: max(16px, calc(env(safe-area-inset-bottom) + 10px));
    min-height: 44px;
    padding: 8px 12px;
    font-size: 10px;
  }
  .concept-a .mode-switch-floating.is-hero-visible {
    top: calc(env(safe-area-inset-top) + 76px);
    bottom: auto;
  }
  .concept-a .has-horizontal-slides .scene-detail-point {
    margin-top: 20px;
    padding: 12px 14px;
  }
  .concept-a .has-horizontal-slides:not(.scene-work) .scene-detail-card {
    justify-content: center;
    padding-top: 45px;
    padding-bottom: 100px;
  }
  .concept-a .scene-detail-point small { font-size: 10px; }
  .concept-a .scene-detail-point strong { font-size: 13px; }
  .concept-a .has-horizontal-slides .scene-detail-example { margin-top: 12px; padding: 12px 14px; }
  .concept-a .has-horizontal-slides .scene-detail-example p { font-size: 12px; }
}

@media (max-width: 600px) {
  .concept-a .a-quick-nav .quick-nav-prefix { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .concept-a .a-quick-nav { backdrop-filter: none; }
}
@media (max-width: 600px) and (max-height: 620px) {
  .concept-a .has-horizontal-slides:not(.scene-work) .scene-detail-card {
    justify-content: flex-start;
    padding-top: 40px;
  }
}

@media (max-width: 600px) {
  .concept-a .has-horizontal-slides .scene-detail-rail {
    height: calc(100% - 54px);
  }
  .concept-a .has-horizontal-slides .scene-detail-card.scene-detail-card-group {
    justify-content: flex-start;
    overflow-y: auto;
  }
}

/* AI研修の概要文は画面幅に合わせて読みやすい大きさにする。 */
.concept-a .scene-ai-method .scene-copy > p:not(.scene-index) {
  max-width: min(100%, 650px);
  font-size: clamp(17px, 1.7vw, 21px);
  line-height: 1.7;
}
@media (max-width: 600px) {
  .concept-a .scene-ai-method .scene-copy > p:not(.scene-index) {
    font-size: clamp(16px, 4.4vw, 18px);
    line-height: 1.7;
  }
  .concept-a .scene-ai-method .scene-visual-summary {
    padding: 14px;
  }
  .concept-a .scene-ai-method .scene-summary-list > div {
    padding: 8px 9px;
  }
  .concept-a .scene-ai-method .scene-summary-list dt {
    font-size: 11px;
  }
  .concept-a .scene-ai-method .scene-summary-list dd {
    font-size: 13px;
    line-height: 1.45;
  }
}
@media (max-width: 600px) and (max-height: 650px) {
  .concept-a .scene-ai-method .experience-scene-inner {
    grid-template-rows: auto auto;
    align-content: start;
    align-items: start;
    gap: 16px;
  }
}

/* モードチェンジ内でも通常ページと同じ窓口へ送信できるフォーム。 */
.concept-a .experience .scene-contact-form-card {
  display: block;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: #102d1d;
  padding: clamp(20px, 3vw, 36px) clamp(22px, 4vw, 48px) 88px;
}
.concept-a .experience .scene-contact-form-card h3 { margin: 8px 0; font-size: clamp(25px, 2.5vw, 36px); }
.concept-a .experience .scene-contact-form-card > .scene-form-loop-hint {
  margin: 22px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(176, 231, 187, .35);
  color: #addbb8;
  font: 12px ui-monospace, monospace;
  letter-spacing: .04em;
}
.concept-a .experience .scene-contact-form-card > p { max-width: none; margin-bottom: 16px; }
.concept-a .experience .scene-contact-form-card .linker-contact-form {
  width: min(100%, 920px);
  padding: clamp(18px, 2vw, 28px);
  color: #18251b;
}
.concept-a .experience .scene-contact-form-card .contact-fields {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 18px;
}
.concept-a .experience .scene-contact-form-card .contact-fields > label,
.concept-a .experience .scene-contact-form-card .contact-fields > p { min-width: 0; }
.concept-a .experience .scene-contact-form-card .contact-fields > label:has(textarea),
.concept-a .experience .scene-contact-form-card .contact-fields > .contact-consent,
.concept-a .experience .scene-contact-form-card .contact-topic-note { grid-column: 1 / -1; }
.concept-a .experience .scene-contact-form-card .contact-fields > label:not(.contact-consent),
.concept-a .experience .scene-contact-form-card .contact-consent,
.concept-a .experience .scene-contact-form-card .contact-submit { font-size: 16px; }
.concept-a .experience .scene-contact-form-card .contact-fields input:not([type=checkbox]),
.concept-a .experience .scene-contact-form-card .contact-fields select,
.concept-a .experience .scene-contact-form-card .contact-fields textarea { font-size: 16px; }
.concept-a .experience .scene-contact-form-card .contact-fields textarea { min-height: 112px; }
.concept-a .experience .scene-contact-form-card .contact-topic-note,
.concept-a .experience .scene-contact-form-card .contact-form-note { max-width: none; color: #31583a; font-size: 14px; }
.concept-a .experience .scene-contact-form-card .contact-form-note a,
.concept-a .experience .scene-contact-form-card .contact-consent a { min-height: 44px; color: #146c3b; font-size: inherit; }
.concept-a .experience .scene-contact-form-card .contact-consent { min-height: 44px; align-items: center; }
.concept-a .experience .scene-contact-form-card .contact-consent a { display: inline; min-height: 0; padding-block: 10px; }
@media (max-width: 650px) {
  .concept-a .experience .scene-contact-form-card .contact-form-note {
    display: block;
  }
  .concept-a .experience .scene-contact-form-card .contact-form-note a {
    display: block;
    padding-block: 10px;
    max-width: 100%;
  }
  .concept-a .experience .scene-contact-form-card { padding: 22px 61px 100px 18px; }
  .concept-a .experience .scene-contact-form-card .contact-fields { grid-template-columns: 1fr; }
  .concept-a .experience .scene-contact-form-card .linker-contact-form { padding: 18px 14px; }
  .concept-a .experience .scene-contact-form-card .contact-consent span { font-size: 14px; }
}

/* モードチェンジ後の説明は、小さな画面でも読める文字サイズを保つ。 */
.concept-a .experience .scene-index,
.concept-a .experience .scene-summary-label,
.concept-a .experience .scene-summary-list dt,
.concept-a .experience .scene-highlights dt,
.concept-a .experience .scene-detail-card > span,
.concept-a .experience .scene-detail-example span,
.concept-a .experience .scene-product-context small {
  font-size: 12px;
}
.concept-a .experience .scene-copy > p:not(.scene-index) {
  font-size: clamp(16px, 1.5vw, 20px);
  line-height: 1.7;
}
.concept-a .experience .scene-summary-list dd,
.concept-a .experience .scene-highlights dd {
  font-size: clamp(14px, 1.15vw, 17px);
  line-height: 1.5;
}
.concept-a .experience .scene-detail-card p,
.concept-a .experience .scene-detail-card .scene-detail-example p,
.concept-a .experience .scene-topic p,
.concept-a .experience .scene-work-details p {
  font-size: clamp(15px, 1.3vw, 19px);
  line-height: 1.7;
}
.concept-a .experience .scene-topic a,
.concept-a .experience .scene-detail-card > a,
.concept-a .experience .scene-work-details summary,
.concept-a .experience .scene-case-flow,
.concept-a .experience .scene-discovery-note {
  font-size: 14px;
}
.concept-a .experience .scene-topic .scene-detail-point strong,
.concept-a .experience .scene-ai-demo .ai-demo-head,
.concept-a .experience .scene-ai-demo .ai-demo-head small,
.concept-a .experience .scene-ai-demo .ai-demo-input,
.concept-a .experience .scene-ai-demo .ai-demo-actions,
.concept-a .experience .scene-ai-demo .ai-demo-actions button,
.concept-a .experience .scene-ai-demo .ai-demo-terminal p,
.concept-a .experience .scene-ai-demo .ai-demo-result span,
.concept-a .experience .scene-ai-demo .ai-demo-result small,
.concept-a .experience .scene-ai-demo .ai-demo-result strong,
.concept-a .experience .scene-sample-preview figcaption,
.concept-a .experience .scene-case-display figcaption span,
.concept-a .experience .scene-case-display figcaption small,
.concept-a .experience .scene-case-count,
.concept-a .experience .scene-sample-label {
  font-size: 12px;
}
@media (max-width: 600px) {
  .concept-a .experience .scene-visual-summary { padding: 14px; gap: 9px; }
  .concept-a .experience .scene-summary-list > div { padding: 9px 10px; }
  .concept-a .experience .scene-summary-list dt { margin-bottom: 3px; }
  .concept-a .experience .scene-highlights > div { padding: 10px 11px; }
  .concept-a .experience .scene-highlights dt { margin-bottom: 4px; }
}

/* 運営サービスは横移動1回で5件を比較できる一覧にする。 */
.concept-a .has-horizontal-slides.scene-products .scene-product-collection {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  padding: 35px clamp(84px, 8vw, 120px) 82px clamp(24px, 6vw, 90px);
}
.concept-a .has-horizontal-slides.scene-products .scene-product-collection > h3 {
  max-width: none;
  margin: 9px 0 18px;
  font-size: clamp(30px, 3.8vw, 48px);
}
.concept-a .scene-product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  width: 100%;
}
.concept-a .has-horizontal-slides .scene-product-item {
  display: flex;
  min-width: 0;
  min-height: 150px;
  flex-direction: column;
  margin-top: 0;
  padding: 13px 16px;
  border: 1px solid rgba(180, 231, 192, .42);
  background: rgba(5, 31, 18, .62);
  color: #f1fbf2;
  text-decoration: none;
  transition: border-color .2s, background .2s;
}
.concept-a .scene-product-item:hover { border-color: #a9dfb5; background: rgba(35, 83, 50, .75); }
.concept-a .scene-product-item:focus-visible { outline: 3px solid #e9f7eb; outline-offset: 2px; }
.concept-a .scene-product-meta { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.concept-a .scene-product-item small { color: #a9dfb5; font-size: 12px; font-weight: 700; }
.concept-a .scene-product-meta span {
  color: #c7eecf;
  font-size: 12px;
  text-decoration: underline;
  text-underline-offset: 4px;
}
.concept-a .scene-product-item h4 { margin: 7px 0; color: #f1fbf2; font-size: clamp(17px, 1.55vw, 22px); line-height: 1.3; }
.concept-a .experience .scene-product-item p { max-width: none; margin: 0; font-size: 15px; line-height: 1.5; }
@media (max-width: 900px) {
  .concept-a .scene-product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 600px) {
  .concept-a .has-horizontal-slides.scene-products .scene-product-collection {
    justify-content: flex-start;
    padding: 18px 65px 48px 22px;
  }
  .concept-a .has-horizontal-slides.scene-products .scene-product-collection > h3 { margin: 6px 0 10px; font-size: 30px; }
  .concept-a .scene-product-grid { grid-template-columns: 1fr; gap: 7px; }
  .concept-a .has-horizontal-slides .scene-product-item { min-height: 0; padding: 8px 11px; }
  .concept-a .scene-product-item h4 { margin: 4px 0; font-size: 18px; }
  .concept-a .experience .scene-product-item p { line-height: 1.4; }
}
@media (min-width: 480px) and (max-width: 600px) {
  .concept-a .scene-product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}