/*PCでは有効or無効*/
.sp-br{
    display: none;
}
.pc-br{
    display: block;
}
a.pc-BTN{
    display: block;
}
a.sp-BTN{
    display: none;
}

/*スマートフォンでは有効or無効*/
@media screen and (max-width:768px) {
    .sp-br{
        display: block;
    }
    .pc-br{
        display: none;
    }
    a.pc-BTN{
        display: none;
    }
    a.sp-BTN{
        display: block;
    }
}