/*ýÌå²éѯ*/
/*for >641px with screen*/
@media only screen and (min-width: 640px){
    html,img{
        font-size:200px;
    }
}
/*for 480px with screen*/
@media only screen and (min-width: 480px) and (max-width: 640px){
    html,img{
        font-size:132px;
    }
}
/*for 400px with screen*/
@media only screen and (min-width: 400px) and (max-width: 480px){
    html,img{
        font-size:121px;
    }
}
/*for 360px with screen*/
@media only screen and (min-width: 360px) and (max-width: 400px){
    html,img{
        font-size: 112.5px;
    }
}
/*for 320px with screen*/
@media only screen and (min-width: 320px) and (max-width: 360px){
    html,img{
        font-size:100px;
    }
}
@media only screen and (max-width: 320px){
    html,img{
        font-size:100px;
    }
}