#detail_01 {
    margin: 0px auto;
    padding: 0px 40px;
    width: calc(100% - 80px);
}

#detail_01 h3 {
    font-size: 18px;
    font-weight: 600;
    margin: 30px 0px 0px 0px;
    text-decoration: underline 1.5px solid black;
}

#detail_01 p {
    margin: 10px 0px 0px 0px;
    line-height: 1.6;
}