#main-content-a {
    max-width: 1300px;
    margin-left: auto;
    margin-right: auto;
}

.main-content-a-1 {
    margin-left: auto;
    margin-right: auto;
    margin-top: 20px;
}

.main-content-a-1::after {
    content: "";
    display: table;
    clear: both;
}

.text-2 {
    text-align: center;
    font-size: 35px;
    font-weight: bold;
}

.text-3 {
    text-align: center;
    font-size: 20px;
    margin-bottom: 40px;
}

.text-4 {
    text-align: justify;
}

.column-a {
    float: left;
    padding: 10px;
    display: block;
    overflow: hidden;
    position: relative;
}

.column-a.left-a {
    width: 50%;
    padding: 10px;
    text-align: center;
}

.column-a.right-a {
    width: 50%;
    padding: 10px;
    text-align: center;
}

@media screen and (max-width: 600px) {
    .column-a.left-a, .column-a.right-a {
        padding-top: 0;
        text-align: center;
        width: 100%;
    }
}