把此下代码放入scss文件 使用时候引入scss文件

@charset "UTF-8";
$yh:"Microsoft yahei";
@function rm($px, $base: 24) {
  @return ($px / $base) * 1rem;
}
// @function pxToRemr($px, $base: 14.0625) {
//   @return ($px / $base) * 1rem;
// }
html {
   font-size: 62.5%; font-family:$yh;
}
body, textarea, input, select, option {
  color: #333;
  font-family: "Hiragino Sans GB", "Microsoft Yahei", tahoma, arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color:transparent;
}
body,h1,h2,h3,h4,h5,h6,blockquote,ol,ul,dl,dd,p,textarea,input,select,option,form {
    margin:0; padding:0;
}

ol,ul,textarea,input,option,th,td {
    padding:0;
}
.page{
    min-width: 320px;max-width: 750px;margin: 0 auto;
}
h1,h2,h3,h4,h5,h6 {
    font-weight: normal;
    font-size:100%;
}
a,select,input,textarea{
    outline: none;
}
article, aside, details, figcaption, figure, footer, header, menu, nav, section {
    display: block;
}
table {
    border-collapse:collapse;border-spacing: 0;
}
ul,ol {
    list-style-type:none;
}
.hide {
    display: none;
}
.show {
    display: block;
}
.clearfix:after {
    content:'.';display:block;height:0;clear:both;visibility:hidden;
}
//.clearfix {*zoom:1;}
.clear {
    clear:both;height:0;overflow:hidden;
}
/* ios默认文本框阴影 */
input[type=text],textarea{
    -webkit-appearance:none;
}
/* 低版本安卓文本框层级问题 */
input:focus{
    -webkit-user-modify:read-write-plaintext-only;
}
fieldset, img {
    border: 0;
}
a {
    text-decoration:none;
}
a,textarea,input{
    outline:none;
}
blockquote, q {
    quotes: none;
}
blockquote:before, blockquote:after, q:before, q:after {
  content: '';
  content: none;
}
textarea {
    overflow:auto;resize:none;
}
// 以下是按照320下12像素字号走的，因为谷歌不识别小于12号字号
@media only screen and (min-width: 320px){
    html {
        font-size: 75%!important; /* 12÷16=75% */
    }
}
/**
    62.5%   10px;
    640 150%    24px;
    320除以标准比例 640  再乘以 640的基数24  再除以  HTML 根据基数16
    320/640  * 24 / 16 = 75%;
    375/640  * 24 / 16 = 87.89%;
    414/640  * 24 / 16 = 97.03%
*/
@media only screen and (min-width: 360px){
    html {
        font-size: 84.3%!important; /* 13.5÷16=84.3% */
    }
}
@media only screen and (min-width: 375px){
    html {
        font-size: 87.890625%!important; /* 14.0625÷16=87.890625% */
    }
}
@media only screen and (min-width: 384px){
    html {
        font-size: 90%!important; /* 14.4÷16=90% */
    }
}
@media only screen and (min-width: 390px){
    html {
        font-size: 91.4%!important; /* 14.625÷16=91.4% */
    }
}
@media only screen and (min-width: 411px){
    html {
        font-size: 96.56%!important; /* 15.45÷16=96.56% */
    }
}
@media only screen and (min-width: 414px){
    html {
        font-size: 97.03%!important; /* 15.525÷16=97.03% */
    }
}
@media only screen and (min-width: 480px){
    html {
        font-size: 112.5%!important; /* 18÷16=112.5% */
    }
}
@media only screen and (min-width: 540px){
    html {
        font-size: 126.5625%!important; /* 28.125÷16=175.78125% */
    }
}
@media only screen and (min-width: 560px){
    html {
        font-size: 131.25%!important;/* 21÷16=131.25% */
    }
}
@media only screen and (min-width: 640px){
    html {
        font-size: 150%!important; /* 24÷16=150% */
    }
}
@media only screen and (min-width: 720px){
    html {
        font-size: 168.75%!important; /* 27÷16=168.75% */
    }
}
@media only screen and (min-width: 750px){
    html {
        font-size: 175.78125%!important; /* 28.125÷16=175.78125% */
    }
}
@media only screen and (min-width: 768px){
    html {
        font-size: 180%!important; /* 28.125÷16=175.78125% */
    }
}
@media only screen and (min-width: 800px){
    html {
        font-size: 187.5%!important; /* 30÷16=146.43% */
    }
}
@media only screen and (min-width: 960px){
    html {
        font-size: 225%!important; /* 36÷16=146.43% */
    }
}
@media only screen and (min-width: 1024px){
    html {
        font-size: 240%!important; /* 36÷16=146.43% */
    }
}

　　本章CSDN地址:https://blog.csdn.net/lastone1212/article/details/117332284