@media screen and (max-width:960px) {
.box>h1 {
    font-size: 20px;
}
   
    .box>p{
            font-size: 14px;
            letter-spacing: 0.02rem;
    }
    
    .box{
        padding: 15px;
    }
    
    .center{
        font-size: 14px;
    }
    
    .sp{
       display: block;
    }
}


@media screen and (max-width:640px) {

    
} /* 600 */


@media screen and (max-width: 480px) {

} /* 480 */