/* 画像ホバー効果 */
  .sec03_main_img {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    transition: transform 0.3s ease;
  }

  .sec03_main_img.has-expand {
    cursor: pointer;
  }

  .sec03_main_img.has-expand:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(23, 148, 172, 0.3);
  }

  .feature-image {
    transition: filter 0.3s ease;
    display: block;
    width: 100%;
    height: auto;
  }

  .sec03_main_img.has-expand:hover .feature-image {
    filter: brightness(0.8);
  }

  .image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(23, 148, 172, 0.9);
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    font-size: 14px;
    font-weight: 500;
  }

  .sec03_main_img.has-expand:hover .image-overlay {
    opacity: 1;
  }

  .image-overlay i {
    font-size: 24px;
    margin-bottom: 8px;
  }

  .sec03_main_img.no-expand {
    cursor: default;
  }

  .sec03_main_img.no-expand:hover {
    transform: none;
  }

  .sec03_main_img.no-expand .image-overlay {
    display: none;
  }

  /* モーダルスタイル */
  .image-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
  }

  .image-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(5px);
    cursor: pointer;
  }

  .image-modal-content {
    position: relative;
    background: white;
    margin: 20px auto;
    max-width: 600px;
    max-height: 90%;
    border-radius: 12px;
    overflow: hidden;
    animation: modalZoomIn 0.3s ease-out;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
  }

  @keyframes modalZoomIn {
    from {
      opacity: 0;
      transform: scale(0.5);
    }
    to {
      opacity: 1;
      transform: scale(1);
    }
  }

  .image-modal-header {
    background: linear-gradient(135deg, #1794ac 0%, #0f6b7a 100%);
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .image-modal-header h3 {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 600;
  }

  .image-modal-close {
    background: none;
    border: none;
    color: white;
    font-size: 20px;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.3s ease;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .image-modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
  }

  .image-modal-close:active {
    transform: scale(0.95);
  }

  .image-modal-body {
    padding: 0;
    background: #f8f9fa;
  }

  .modal-image-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
  }

  #modal-image {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    display: none;
  }

  .image-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #64748b;
  }

  .image-loading .spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #e2e8f0;
    border-top: 4px solid #1794ac;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
  }

  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }

  /* レスポンシブ対応 */
  @media (max-width: 768px) {
    .image-modal-content {
      margin: 10px;
      max-width: calc(100% - 20px);
      max-height: calc(100% - 20px);
    }

    .image-overlay {
      font-size: 12px;
    }

    .image-overlay i {
      font-size: 20px;
    }
  }