/*正常*/
html{
    font-size: 100px;
}
.pc{
    display: block;
}
.mobile{
    display: none;
}
/*手机尺寸*/
@media screen and (max-width: 750px) {
    .pc{
        display: none;
    }
    .mobile{
        display: block;
    }
}
@media screen and (min-width: 750px) and (max-width: 1050px) {
    .pc{
        display: none;
    }
    .mobile{
        display: block;
    }
}
@media screen and (min-width: 1200px) and (max-width: 1900px) {
    html{
        font-size: 90px;
    }
    .pc{
        display: block;
    }
    .mobile{
        display: none;
    }
}
@media screen and (min-width: 2000px) and (max-width: 2999px) {
    html{
        font-size: 120px;
    }
    .pc{
        display: block;
    }
    .mobile{
        display: none;
    }
}
@media screen and (min-width: 3000px){
    html{
        font-size: 200px;
    }
    .pc{
        display: block;
    }
    .mobile{
        display: none;
    }
}