resset-rem.css

@charset "utf-8";
/*=========================Reset_start==========================*/
body,h1,h2,h3,h4,h5,h6,div,p,dl,dt,dd,ol,ul,li,form,table,th,td,a,img,span,strong,var,em,input,textarea,select,option{margin: 0; padding: 0;}
html,body{font-family:"微软雅黑","宋体",Arail,Tabhoma;text-align: left;}
ul,ol{list-style: none;}
img{border: 0 none;}
input,select,textarea{outline:0;}
textarea{resize:none; overflow: auto;}
table{border-collapse: collapse; border-spacing: 0;}
th,strong,var,em{font-weight: normal; font-style: normal;}
a{text-decoration: none;}

/*==========================Reset_End===========================*/

@charset "utf-8";

html {
    font-size:32px;
}
@media only screen and (min-width: 320px){
    html {
        font-size: 32px !important;
    }
}

@media only screen and (min-width: 360px){
    html {
        font-size: 36px !important;
    }
}
@media only screen and (min-width: 375px){
    html {
        font-size: 37.5px !important;
    }
}
@media only screen and (min-width: 384px){
    html {
        font-size: 38.4px !important;
    }
} 
@media only screen and (min-width: 411px){
    html {
        font-size: 41.1px !important;
    }
} 
@media only screen and (min-width: 412px){
    html {
        font-size: 41.2px !important;
    }
}
@media only screen and (min-width: 414px){
    html {
        font-size: 41.4px !important;
    }
}
@media only screen and (min-width: 481px){
    html {
        font-size: 48.1px !important;
    }
}

@media only screen and (min-width: 540px){
    html {
        font-size: 54px !important;
    }
}
@media only screen and (min-width: 600px){
    html {
        font-size: 60px !important;
    }
    /* body{
        max-width: 600px;
    } */

}


@media only screen and (min-width: 768px){
    html {
        font-size: 76.8px !important;
    }
    /* body{
        max-width: 600px;
    } */

}

@media only screen and (min-width: 1024px){
    html {
        font-size: 102.4px !important;
    }
    body{
        max-width: 1024px;
    }

}

/*//媒体查询改变根元素的字体大小*/

来源：CSDN

作者：上头upup

链接：https://blog.csdn.net/qq_45802159/article/details/104388035