.content_txtarea{
    margin-top: 40px;
}
.content_txt_right{
    margin-top: 20px;
    text-align: right;
}
.content_txt{
    padding-bottom: 40px;
    margin-bottom: 40px;
    border-bottom: 1px solid #c8c8c8;
}
.content_subttl h4{
    font-size: 18px;
}
.content_txt_under{
    margin-top: 20px;
}
.content_area{
    max-width: 1000px;
}
@media screen and (min-width:768px) {
.content_subttl h4{
    font-size: 24px;
}
.content_txt {
    padding-bottom: 60px;
    margin-bottom: 60px;
    border-bottom: 1px solid #c8c8c8;
}
.content_txt_right{
    margin-top: 30px;
}
}