.exp p {
        background-color: #fff;
    }
    #contents h1 {
        border-bottom: 2px solid #ccc;
        padding-bottom: 5px;
    }
    #contents h2 {
        color: #4c7437;
        border-bottom: 2px solid #ccc;
        padding-bottom: 5px;
    }

    h3 {
        color: #4c7437;
        border-bottom: 1px solid #ccc;
        padding-bottom: 3px;
      }

    #contents p {
        padding: 20px;
    }
    #contents a {
        color: #4c7437;
        text-decoration: none;
    }
    a:hover {
        text-decoration: underline;
    }
    .timeline {
        position: relative;
        max-width: 1200px;
        margin: 0 auto;
        padding: 20px 0;
    }
    .timeline::after {
        content: '';
        position: absolute;
        width: 6px;
        background-color: #4c7437;
        top: 0;
        bottom: 0;
        left: 50%;
        margin-left: -3px;
    }
    .timeline ul {
        padding: 0;
        margin: 0;
    }
    .timeline li {
        list-style-type: none;
        position: relative;
        width: 50%;
        padding: 20px 40px;
        box-sizing: border-box;
    }
    .timeline li:nth-child(odd) {
        left: 0;
    }
    .timeline li:nth-child(even) {
        left: 50%;
    }
    .timeline li:nth-child(even) .timeline-content {
    border-left: none;
    border-right: 4px solid #4c7437; /* 偶数番目の項目は右側に境界線を追加 */
    }
    .timeline li::after {
        content: '';
        position: absolute;
        width: 25px;
        height: 25px;
        right: -17px;
        background-color: #f8f5ee;
        border: 4px solid #4c7437;
        top: 15px;
        border-radius: 50%;
        z-index: 1;
    }
    .timeline li:nth-child(even)::after {
        left: -16px;
    }
    .timeline-content {
    padding: 20px 30px;
    background-color: #ffffff; /* 白色の背景に変更 */
    position: relative;
    border-radius: 6px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    border-left: 4px solid #4c7437; /* 左側にアクセントカラーの境界線を追加 */
    }
    .timeline-content h3 {
    margin: 0 0 10px;
    color: #4c7437;
    font-size: 1.2em;
    }
    .timeline-content p {
    margin: 0;
    font-size: 0.9em;
    line-height: 1.6;
    color: #333; /* テキストの色を濃い目のグレーに設定 */
    }
    @media screen and (max-width: 600px) {
        .timeline::after {
            left: 26.5px;  /* 線の位置も合わせて調整 */
        }
        .timeline li {
            width: 100%;
            padding-left: 50px;
            padding-right: 25px;
        }
        .timeline li::after {
            left: 13px;  /* 丸を左に2px移動 */
            width: 25px;
            height: 25px;
            top: 25px;
            border: 4px solid #4c7437;
        }
        .timeline li:nth-child(even) {
            left: 0;
        }
        .timeline li:nth-child(even)::after {
            left: 13px;  /* 偶数番目の丸も同じく左に */
        }
        .timeline li:nth-child(even) .timeline-content {
            border-right: none;
            border-left: 4px solid #4c7437;
        }
        .timeline-content {
            margin-left: 15px;
        }
    }
    #contents .intro-paragraph {
        background-color: #e8f3e0; /* 薄い緑色の背景 */
        padding: 20px;
        border-radius: 8px;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        margin-bottom: 30px;
        border-left: 5px solid #4c7437; /* 左側に濃い緑色のボーダー */
        font-size: 1.1em;
        line-height: 1.6;
        color: #333;
    }
    
    .intro-paragraph a {
        color: #4c7437;
        text-decoration: none;
        font-weight: bold;
    }
    
    .intro-paragraph a:hover {
        text-decoration: underline;
    }