.accordion-toggle {
    display: block;
    width: 100%;
    background: linear-gradient(135deg, #a7f7f0, #b9faf4);
    color: #333;
    padding: 14px 20px;
    margin: 12px 0;
    font-size: 1.1rem;
    font-weight: bold;
    text-align: left;
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    cursor: pointer;
    transition: background 0.3s ease, transform 0.2s ease;
  }
  
  .accordion-toggle:hover {
    background: linear-gradient(135deg, #fbecc8, #fac4b2);
    transform: translateY(-2px);
  }
  
  
  /* アコーディオン本体 */
  .accordion .accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease;
  }
  
  .accordion .accordion-content.open {
    max-height: 10000px; /* 大きめに確保しておく */
  }
  
  /* カード全体のアニメーション準備 */
  .accordion .gradient-card {
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.5s ease;
  }
  
  /* アコーディオン展開時に左から出現 */
  .accordion .accordion-content.open .gradient-card {
    opacity: 1;
    transform: translateX(0);
  }
  
  /* オプション：アニメーションを順番にずらす */
  .gradient-card:nth-child(1) { transition-delay: 0.1s; }
  .gradient-card:nth-child(2) { transition-delay: 0.2s; }
  .gradient-card:nth-child(3) { transition-delay: 0.3s; }