/* 從現有 cases.html 搬移，保留原有效果 */
.breadcrumb {
      padding: 0.85rem var(--space-md);
      background: var(--color-white);
      border-bottom: 1px solid rgba(37, 57, 147, 0.1);
    }

    .breadcrumb-inner {
      max-width: var(--max-w);
      margin: 0 auto;
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 0.45rem;
      font-size: 0.88rem;
      color: var(--color-muted);
    }

    .breadcrumb a {
      color: var(--color-primary);
    }

    .breadcrumb a:hover,
    .breadcrumb a:focus-visible {
      text-decoration: underline;
      text-underline-offset: 3px;
    }

    .lead-copy {
      max-width: 56rem;
    }

    .lead-copy p {
      margin: 0 0 1rem;
    }

    .lead-copy strong {
      color: var(--color-primary);
    }

    .text-link {
      color: var(--color-primary);
      font-weight: 700;
      text-decoration: underline;
      text-underline-offset: 3px;
    }

    .text-link:hover,
    .text-link:focus-visible {
      color: var(--color-primary-deep);
    }

    .stat-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1px;
      margin-top: var(--space-lg);
      background: rgba(37, 57, 147, 0.13);
      border: 1px solid rgba(37, 57, 147, 0.13);
    }

    .stat-item {
      padding: var(--space-md) var(--space-sm);
      background: var(--color-white);
      text-align: center;
    }

    .stat-num {
      display: block;
      font-family: var(--font-display);
      font-size: clamp(1.9rem, 4.5vw, 2.7rem);
      font-weight: 800;
      line-height: 1;
      color: var(--color-primary);
    }

    .stat-num span {
      color: var(--color-accent);
    }

    .stat-label {
      display: block;
      margin-top: 0.4rem;
      font-size: 0.88rem;
      color: var(--color-muted);
    }

    .filter-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 0.55rem;
      margin-top: var(--space-lg);
    }

    .filter-btn {
      padding: 0.55rem 1.1rem;
      background: var(--color-white);
      border: 1px solid rgba(37, 57, 147, 0.22);
      font-family: var(--font-body);
      font-size: 0.92rem;
      font-weight: 700;
      color: var(--color-primary);
      cursor: pointer;
      transition:
        background 0.22s var(--ease),
        color 0.22s var(--ease),
        transform 0.22s var(--ease);
    }

    .filter-btn:hover,
    .filter-btn:focus-visible {
      transform: translateY(-2px);
      outline: none;
    }

    .filter-btn.is-active {
      background: var(--color-primary);
      color: var(--color-white);
      border-color: var(--color-primary);
    }

    .case-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: var(--space-md);
      margin-top: var(--space-lg);
    }

    .case-card {
      display: flex;
      flex-direction: column;
      background: var(--color-white);
      overflow: hidden;
      box-shadow: 0 6px 24px rgba(26, 42, 110, 0.07);
      transition:
        transform 0.28s var(--ease),
        box-shadow 0.28s var(--ease);
    }

    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-soft);
    }

    .case-card.is-hidden {
      display: none;
    }

    .case-figure {
      position: relative;
      margin: 0;
      overflow: hidden;
    }

    .case-figure img {
      display: block;
      width: 100%;
      aspect-ratio: 4 / 3;
      object-fit: cover;
      transition: transform 0.5s var(--ease);
    }

    .case-card:hover .case-figure img {
      transform: scale(1.05);
    }

    .case-tag {
      position: absolute;
      top: 0.7rem;
      left: 0.7rem;
      padding: 0.28rem 0.7rem;
      background: rgba(26, 42, 110, 0.9);
      color: var(--color-white);
      font-family: var(--font-display);
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: 0.05em;
      backdrop-filter: blur(6px);
    }

    .case-body {
      flex: 1 1 auto;
      padding: var(--space-sm) var(--space-md) var(--space-md);
    }

    .case-body h3 {
      margin: 0 0 0.4rem;
      font-family: var(--font-display);
      font-size: 1.08rem;
      line-height: 1.35;
      color: var(--color-primary);
    }

    .case-body p {
      margin: 0;
      font-size: 0.88rem;
      line-height: 1.65;
      color: var(--color-muted);
    }

    .empty-note {
      display: none;
      margin-top: var(--space-md);
      padding: var(--space-md);
      background: var(--color-white);
      border-left: 4px solid var(--color-accent);
      color: var(--color-muted);
    }

    .empty-note.is-visible {
      display: block;
    }

    .scenario-list {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: var(--space-md);
      margin-top: var(--space-lg);
    }

    .scenario-card {
      display: grid;
      grid-template-columns: 0.85fr 1.15fr;
      background: var(--color-white);
      overflow: hidden;
      border-left: 4px solid var(--color-accent);
    }

    .scenario-card img {
      width: 100%;
      height: 100%;
      min-height: 190px;
      object-fit: cover;
    }

    .scenario-body {
      padding: var(--space-md);
    }

    .scenario-body h3 {
      margin: 0 0 0.5rem;
      font-family: var(--font-display);
      font-size: 1.18rem;
      color: var(--color-primary);
    }

    .scenario-body p {
      margin: 0 0 0.65rem;
      font-size: 0.92rem;
      line-height: 1.7;
      color: var(--color-muted);
    }

    .scenario-body p:last-child {
      margin-bottom: 0;
    }

    .scenario-meta {
      display: inline-block;
      margin-bottom: 0.5rem;
      padding: 0.2rem 0.6rem;
      background: rgba(37, 57, 147, 0.08);
      font-size: 0.78rem;
      font-weight: 700;
      color: var(--color-primary);
    }

    .tip-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: var(--space-md);
      margin-top: var(--space-lg);
      counter-reset: tip;
    }

    .tip-card {
      padding: var(--space-md);
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.16);
      counter-increment: tip;
    }

    .tip-card::before {
      content: "0" counter(tip);
      display: block;
      margin-bottom: 0.55rem;
      font-family: var(--font-display);
      font-size: 1.7rem;
      font-weight: 800;
      line-height: 1;
      color: var(--color-accent);
    }

    .tip-card h3 {
      margin: 0 0 0.45rem;
      font-family: var(--font-display);
      font-size: 1.14rem;
      color: var(--color-white);
    }

    .tip-card p {
      margin: 0;
      font-size: 0.91rem;
      line-height: 1.65;
      color: rgba(255, 255, 255, 0.78);
    }

    .info-table {
      width: 100%;
      margin-top: var(--space-md);
      border-collapse: collapse;
      background: var(--color-white);
      border: 1px solid rgba(37, 57, 147, 0.14);
    }

    .info-table caption {
      padding-bottom: 0.6rem;
      text-align: left;
      font-size: 0.88rem;
      color: var(--color-muted);
    }

    .info-table th,
    .info-table td {
      padding: 0.85rem 1rem;
      text-align: left;
      vertical-align: top;
      font-size: 0.93rem;
      line-height: 1.6;
      border-bottom: 1px solid rgba(37, 57, 147, 0.1);
    }

    .info-table thead th {
      background: var(--color-primary);
      color: var(--color-white);
      font-weight: 700;
    }

    .info-table tbody th {
      width: 26%;
      background: rgba(37, 57, 147, 0.05);
      font-weight: 700;
      color: var(--color-primary);
    }

    .info-table tr:last-child th,
    .info-table tr:last-child td {
      border-bottom: none;
    }

    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
      margin-top: var(--space-lg);
    }

    .faq-item {
      overflow: hidden;
      background: var(--color-white);
      border: 1px solid rgba(37, 57, 147, 0.14);
    }

    .faq-item h3 {
      margin: 0;
    }

    .faq-question {
      width: 100%;
      padding: 1rem var(--space-md);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      text-align: left;
      font-family: var(--font-body);
      font-size: 1rem;
      font-weight: 700;
      line-height: 1.5;
      color: var(--color-primary);
      cursor: pointer;
    }

    .faq-question::after {
      content: "+";
      flex: 0 0 auto;
      font-size: 1.55rem;
      font-weight: 400;
      transition: transform 0.25s var(--ease);
    }

    .faq-item.is-open .faq-question::after {
      transform: rotate(45deg);
    }

    .faq-answer {
      display: none;
      padding: 0 var(--space-md) var(--space-md);
      color: var(--color-muted);
    }

    .faq-answer p {
      margin: 0 0 0.75rem;
    }

    .faq-answer p:last-child {
      margin-bottom: 0;
    }

    .faq-item.is-open .faq-answer {
      display: block;
    }

    .related-links {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: var(--space-md);
      margin-top: var(--space-lg);
    }

    .related-card {
      padding: var(--space-md);
      background: var(--color-white);
      border-bottom: 4px solid var(--color-accent);
      transition:
        transform 0.25s var(--ease),
        box-shadow 0.25s var(--ease);
    }

    .related-card:hover,
    .related-card:focus-visible {
      transform: translateY(-3px);
      box-shadow: var(--shadow-soft);
      outline: none;
    }

    .related-card h3 {
      margin: 0 0 0.45rem;
      font-family: var(--font-display);
      font-size: 1.18rem;
      color: var(--color-primary);
    }

    .related-card p {
      margin: 0;
      font-size: 0.92rem;
      color: var(--color-muted);
    }

    @media (max-width: 1100px) {
      .case-grid {
        grid-template-columns: repeat(3, 1fr);
      }
    }

    @media (max-width: 900px) {
      .case-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .scenario-list,
      .tip-grid,
      .related-links {
        grid-template-columns: 1fr;
      }

      .stat-row {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 620px) {
      .case-grid {
        grid-template-columns: 1fr;
      }

      .scenario-card {
        grid-template-columns: 1fr;
      }

      .scenario-card img {
        min-height: 210px;
        aspect-ratio: 4 / 3;
      }

      .info-table tbody th {
        width: 36%;
      }
    }