@media screen and (min-width: 769px) {
.main a,
.main .naiyou-box_txt,
.main p,
.main .seika-txt{
font-size:16px!important;
}	
}
@media screen and (max-width: 768px) {
.main a,
.main .naiyou-box_txt,
.main p,
.main .seika-txt{
font-size:17px!important;
}	
}