body {
    margin: 0;
    padding: 0;
    position: relative;
}

p {
    margin: 0;
}

h1 {
    text-align: center;
}

@media screen and (min-width: 768px) {
    .main {
        width: 1130px;
        margin: 0 auto;
        margin-top: 90px;
    }

    p {
        line-height: 30px;
        text-indent: 2em;
    }
}

@media screen and (max-width: 768px) {
    h1 {
        font-size: 20px;
    }

    h2 {
        font-size: 16px;
    }

    p {
        font-size: 12px;
    }

    .main {
        width: 80%;
        margin: 0 auto;
        margin-top: 80px;
    }

    p {
        line-height: 30px;
        text-indent: 2em;
    }
}