body {
      font-family: Arial, sans-serif;
      line-height: 1.6;
      margin: 0;
      padding: 0;
      background-color: #ffffff;
    }
    header {
      background-image: url(../images/Backblack.PNG);
      background-color: #578654;
      color: rgb(255, 255, 255);
      padding: 1rem 2rem;
    }
    
    .vision-icon-gaiyou{
      width:40%;
      height:auto;
      display:block;
      margin: 0 auto; 
    }
    main {
      max-width: 800px;
      margin: 2rem auto;
      padding: 1rem;
      background-color: white;
      box-shadow: 0 0 10px rgba(0,0,0,0.1);
    }
    h2 {
      color: #ffffff;
    }
    h2{
      color:#578654;
    }
    /*
    table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 8rem;
      padding:50px;
    }
    th, td {
      padding: 0.5rem;
      border: 1px solid #ccc;
      text-align: left;
    }
    footer {
      background-color: #eee;
      text-align: center;
      padding: 1rem;
      margin-top: 2rem;
    }
      */

    /*協賛企業*/
     body {
      font-family: 'Helvetica Neue', sans-serif;
      background: #f5f5f5;
      margin: 0;
      padding: 0;
    }

    .sponsor-section {
      text-align: center;
      padding: 60px 80px;
    }

    .sponsor-section h1 {
      font-size: 32px;
      margin-bottom: 10px;
    }

    .sponsor-section h2 {
      font-size: 18px;
      color: #f1c40f;
      margin-bottom: 40px;
    }

    .sponsor-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 50px 60px;
      max-width: 1100px;
      margin: 0 auto;
    }

    .sponsor-item {
      background: #fff;
      border-radius: 12px;
      padding: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      height: 100%;
      box-shadow: 0 2px 8px rgba(0,0,0,0.5);
    }

    .sponsor-item img {
      max-height: 60px;
      max-width: 100%;
      object-fit: contain;
    }

    @media (max-width: 600px) {
      .sponsor-section h1 {
        font-size: 24px;
      }

      .sponsor-section h2 {
        font-size: 16px;
      }
      .sponsor-item1{
        border-radius: 12px;              
        height: 50%;
      }
      .sponsor-item{        
      border-radius: 12px;
      padding: 10px;      
      height: 100%;
      
      }
    }

    /*寄付サイト上部のボタン*/
    .HOME {
      position: fixed;
      bottom: 30px;
      right: 10px;
      transform: translateX(-50%);
      background: #ffffff;
      color: #76b852;
      font-weight: bold;
      padding: 0.9rem 1.6rem;
      border-radius: 50px;
      text-decoration: none;
      z-index: 9999;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
      transition: background 0.3s, color 0.3s;
    }
    .HOME:hover {
      background: #f0f0f0;
      color: #578654;
    }

    /*協会追加、デザイン*/
        table {
      border-collapse: collapse;
      width: 100%;
      margin-top: 50px;
      margin-bottom:50px;
      padding:50px;
    }
    tr{
      text-align: center;
    }
    th, td {
      border: 1px solid #333;
      padding: 8px;
      text-align: left;
    }
    th {
      background-color: #f2f2f2;
    }
    caption {
      font-weight: bold;
      margin-bottom: 10px;
    }
    .sponsor-item1 {
      background: #fff;
      border-radius: 12px;
      padding: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      height: 100%;
      box-shadow: 0 2px 8px rgba(0,0,0,0.5);
    }