*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

.main{
    width: 900px;
    margin: 0 auto;
    max-width: 100%;
    padding: 20px;
}

.main__ttl{
    text-align: center;
    margin-top: 20px;
    margin-bottom: 20px;
}

.main__sub{
    margin-top: 20px;
    margin-bottom: 10px;
}

.main__txt{
    margin-bottom: 20px;
}

.main__ul{
    margin-bottom: 10px;
    padding-left: 40px;
}

.main__li{
    list-style: decimal;
    margin-bottom: 5px;
}

.main__li-point{
    list-style: disc;
}