body {
      font-family: 'Noto Sans JP', sans-serif;
      margin: 0;
      background: #f5f5f7;
      color: #333;
    }
    header {
      background: linear-gradient(90deg, #00a3a3, #009999);
      color: #fff;
      padding: 40px 20px;
      text-align: center;
    }
    header h1 {
      margin: 0;
      font-size: 2.4rem;
      font-weight: bold;
    }
    header p {
      font-size: 1.1rem;
      margin-top: 8px;
    }

    
    .section-title-divider {
      font-size: 1.4rem;
      font-weight: bold;
      margin-bottom: 30px;
      padding-left: 10px;
      border-left: 5px solid #00a3a3;
      color: #009999;
    }

    
    
    
    
    
    
    .section img {
      width: 100%;
      height: auto;
      margin: 30px 0;
      border-radius: 8px;
    }
    .message {
      background: #fff0f5;
      border-left: 5px solid #e04372;
      padding: 20px;
      margin-top: 40px;
      font-size: 1.1rem;
    }

    

    @media screen and (max-width: 768px) {
      .tab-btn {
        display: block;
        margin-bottom: 6px;
      }
    }