section article.video {
    margin: 20px auto;
    height: 190px;
}

section article.video video {
    margin: 0 0 0 3px;
}

section article h2 {
    font-size: 16px;
    margin: 15px 0 0 0;
}

section article p {
    margin: 10px 0 0 0;
    font-size: 15px;
}

section article ul.frone li {
    margin: 5px 0 0 15px;
    font-size: 14px;
}

section article ol {
    margin: 0 0 0 -20px;
}

section article ol li {
    margin: 5px 0 0 0;
    font-size: 14px;
}

border-solid {
    border: solid;
    margin-top: 100px; /*見やすさを考慮し、画面上部に空間を入れる*/
    width: 100%;       /*画面の横幅を最大に設定*/
}