手机端的默认样式

.box{
width:Rm(100) //相当于100px转成的rem
}

@charset "UTF-8";
 $yh:"Microsoft Yahei";
@function Rm($px, $base: 16) {
  @return ($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: 412px) {
  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: 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: 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% */
//     }
// }