pc端与移动端css初始设置

CSS初始设置

/*PC端重置*/
*{
  padding: 0;
  margin: 0;
}
body{
   font: 12px/24px Microsoft YaHei,Heiti SC,tahoma,arial,Hiragino Sans GB,\\5B8B\4F53,sans-serif;
   color: #333;
}
a{
  color: #333;
  text-decoration: none;
}
img{
  border: 0;
}
ul,li{
  list-style: none;
}
h1,h2,h3,h4,h5,h6{
  font-weight: normal;
  font-style: normal;
}
.clearfix:before,
.clearfix:after {
   content: "";
   display: block;
   height: 0;
   clear: both;
   visibility: hidden;
}
.clearfix {
    zoom: 1;
}
meta标签初始设置
<meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1">
<meta name="keywords" content="" >
<meta name="description" content="">


/*可不写*/
<meta property="og:image" content="" />
<link  type="image/x-icon" rel="icon" href="" >

移动端初始化设置

/* meta标签*/
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" />

/* 重置样式 */
* {
  -webkit-tap-highlight-color: transparent;
  outline: 0; 
}
body, h1, h2, h3, h4, h5, h6, hr, p, blockquote, dl, dt, dd, ul, ol, li, pre, form, fieldset, legend, button, input, textarea, th, td {
  margin: 0;
  padding: 0;
  vertical-align: baseline; 
}
img {
  border: 0 none;
  vertical-align: top; 
}
i, em {
  font-style: normal; 
}
ol, ul {
  list-style: none; 
}
input, select, button, h1, h2, h3, h4, h5, h6 {
  font-size: 100%;
  font-family: inherit;
 }
table {
  border-collapse: collapse;
  border-spacing: 0; 
}
a, a:visited {
  text-decoration: none;
  color: #333; 
}
body {
  margin: 0 auto;
  font-size: 14px;
  font-family: "Helvetica Neue", Helvetica, sans-serif;
  line-height: 1.5;
  color: #666;
  -webkit-text-size-adjust: 100% !important;
  /*-webkit-user-select: none;
  user-select: none;*/
 }
/* rem单位切换
---------------------------------------- */
/* html根元素大小
---------------------------------------- */
html {
  font-size: 20vw; }
  @media screen and (max-width: 320px) {
    html {
      font-size: 64px; } }
  @media screen and (min-width: 540px) {
    html {
      font-size: 108px; } }

body {
  max-width: 540px;
  min-width: 320px; }

视口单位换算

/* 定义基准 750或640 等等 */
$vw_fontsize: 75;
rem = ($px / 2 / $vw_fontsize) * 1rem;