一：移动端公共样式

/* 禁用iPhone中Safari的字号自动调整 */
html {
 -webkit-text-size-adjust: 100%;
 -ms-text-size-adjust: 100%;
 /* 解决IOS默认滑动很卡的情况 */
 -webkit-overflow-scrolling : touch;
}
 
/* 禁止缩放表单 */
input[type="submit"], input[type="reset"], input[type="button"], input {
 resize: none;
 border: none;
}
 
/* 取消链接高亮 */
body, div, ul, li, ol, h1, h2, h3, h4, h5, h6, input, textarea, select, p, dl, dt, dd, a, img, button, form, table, th, tr, td, tbody, article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section {
 -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
 
/* 设置HTML5元素为块 */
article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section {
 display: block;
}
 
/* 图片自适应 */
img {
 width: 100%;
 height: auto;
 width: auto9; /* ie8 */
 display: block;
 -ms-interpolation-mode: bicubic;/*为了照顾ie图片缩放失真*/
}
 
/* 初始化 */
body, div, ul, li, ol, h1, h2, h3, h4, h5, h6, input, textarea, select, p, dl, dt, dd, a, img, button, 
form, table, th, tr, td, tbody, article, aside, details, figcaption, figure, footer, header, hgroup, 
menu, nav, section {
 margin: 0;
 padding: 0;
}
body {
 font: 12px/1.5 'Microsoft YaHei','宋体', Tahoma, Arial, sans-serif;
 color: #fff;
 background-color: #F7F7F7;
}
em, i {
 font-style: normal;
}
ul,li{
 list-style-type: none;
}
strong {
 font-weight: normal;
}
table{
 border-collapse:collapse;
 border-spacing:0
}
textarea {
 resize:none; /*禁用了文本的拖拉，尤其在谷歌下*/
} 
p {
 word-wrap:break-word; /* 不够的单词自动换行 而不会被截掉 */
}
.clearfix:after {
 content: "";
 display: block;
 visibility: hidden;
 height: 0;
 clear: both;
}
.clearfix {
 zoom: 1;
}
a {
 text-decoration: none;
 color: #fff;
 font-family: 'Microsoft YaHei', Tahoma, Arial, sans-serif;
}
a:hover {
 text-decoration: none;
}
ul, ol {
 list-style: none;
}
h1, h2, h3, h4, h5, h6 {
 font-size: 100%;
 font-family: 'Microsoft YaHei';
}
img {
 border: none;
}
input{
 font-family: 'Microsoft YaHei';
}
/*单行溢出*/
.one-txt-cut{
 overflow: hidden;
 white-space: nowrap;
 text-overflow: ellipsis;
}
/*多行溢出 手机端使用*/
.txt-cut{
 overflow : hidden;
 text-overflow: ellipsis;
 display: -webkit-box;
 /* -webkit-line-clamp: 2; */
 -webkit-box-orient: vertical;
}
/* 移动端点击a链接出现蓝色背景问题解决 */
a:link,a:active,a:visited,a:hover {
 background: none;
 -webkit-tap-highlight-color: rgba(0,0,0,0);
 -webkit-tap-highlight-color: transparent;
}
.overflow {overflow:hidden; }
.w50{
 width: 50%;
}
.w25{
 width: 25%;
}
.w20{
 width: 20%;
}
.w33{
 width: 33.333333%;
}
.fl{
 float: left;
}
.fr{
 float: right;
}
.db{
 display: block !important;
}
.dn{
 display: none;
}

二：PC端公共样式

1.简单样式清除

html {width: 100%;-webkit-text-size-adjust:none;-webkit-text-size-adjust: 100%;-ms-text-size-adjust: 100%;-webkit-tap-highlight-color: rgba(0, 0, 0, 0);height: 100%;}
body {width: 100%;height: 100%;font-size: 16px; color: #000;line-height: 24px;background: #fff;min-height: 100%;font-family: 'Microsoft Yahei', '微软雅黑', Arial, sans-serif;}
* {margin: 0;padding: 0;border: 0;}
ul,ul li,ol,li {list-style: none outside none;}
img {vertical-align: middle;border: none;width: 100%;}
i {font: inherit;}
input,select,option {vertical-align: middle;border-radius: 0px;-moz-appearance:none;-webkit-appearance:none;appearance:none;-webkit-tap-highlight-color: rgba(0, 0, 0, 0);outline: none;}
input[type="text"],input[type="button"],input[type="submit"],input[type="reset"] {-webkit-appearance: none;appearance: none;border-radius: 0;outline: none;}
.fl {float: left;display: inline;}
.fr {float: right;display: inline;}
h1,h2,h3,h4,h5,h6,i,strong {font-weight: normal;}
select::-ms-expand { display: none; }
a {color: #fff;text-decoration: none;-webkit-tap-highlight-color: rgba(0, 0, 0, 0);}
a:hover {text-decoration: none;outline: none;}
.clear {clear: both;}
.clearfix:after {content: ".";display: block;height: 0;clear: both;visibility: hidden;}
.clearfix {zoom: 1;display: block;_height: 1px;clear: both;}
body,ul,ol,li,p,h1,h2,h3,h4,h5,h6,form,fieldset,table,td,img,div,dl,dt,dd,input{margin: 0;padding: 0;}

2.ie

/* 
 * <!--[if IE]>
 * <link href="/stylesheets/ie.css" media="screen, projection" rel="stylesheet" type="text/css" />
 * <![endif]--> */

3.手机APP常用部分样式代码整理

 <!-- UC强制全屏 -->
 <meta name="full-screen" content="yes" />
 <!-- QQ强制全屏 -->
 <meta name="x5-fullscreen" content="true" />
 <!-- UC应用模式 -->
 <meta name="browsermode" content="application" />
 <!-- QQ应用模式 -->
 <meta name="x5-page-mode" content="app" />
 
<pre name="code" class="html"><!-- <span style="font-family: Arial, Helvetica, sans-serif;">屏幕自适应 高度</span> -->
 
<meta name="viewport" content="width=device-width, initial-scale=1" />
 
<!-- <span style="font-family: Arial, Helvetica, sans-serif;">js禁止手机浏览器里双击放大页面的功能？</span><span style="font-family: Arial, Helvetica, sans-serif;">--></span>
 
<meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" name="viewport" />
 
<link rel="stylesheet" media="screen and (min-width:950px) and (max-width:1920px)" href="css/web.css" ><!-- web样式调用 -->
<link rel="stylesheet" name="viewport" media="only screen and (max-device-width:640px)" href="css/phone640.css" ><!-- 手机屏幕640px时调用 -->

三 移动端HTML

<html>
<head>
 <meta charset="UTF-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <!-- 关键字和描述 -->
 <meta name="keywords" content="互联网,IT开发,区块链">
 <meta name="description" content="网站是什么事没什么什么事没什么,其实没什么">
 <title>index</title>
 <meta name="viewport" content="initial-scale=1, maximum-scale=1">
 <!--收藏-->
 <!-- <link rel="shortcut icon" href="/favicon.ico"> -->
 <meta name="apple-mobile-web-app-capable" content="yes">
 <meta name="apple-mobile-web-app-status-bar-style" content="black">
 <!--微信缓存-->
 <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
 <meta http-equiv="Pragma" content="no-cache" />
 <meta http-equiv="Expires" content="0" />
 <!-- 图标LOGO -->
 <link rel="icon" href="images/logo.ico" type="image/x-icon"/>
  
 <link rel="stylesheet" href="css/comment.css">	
 <!-- jS -->
 <script type="text/javascript" src="js/comment.js"></script>
</head>
<body>
  
</body>
</html>

四 移动端px转换rem .js

转换比是1:20（即：20px = 1rem） 也可以自己根据需求调

// px转化成rem
(function (doc, win) {
 var docEl = doc.documentElement,
 resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
 recalc = function () {
 var clientWidth = docEl.clientWidth;
 if (!clientWidth) return;
 if(clientWidth>=750){
 docEl.style.fontSize = '20px';
 }else{
 docEl.style.fontSize = 20 * (clientWidth / 375) + 'px';
 }
 };
 
 if (!doc.addEventListener) return;
 win.addEventListener(resizeEvt, recalc, false);
 doc.addEventListener('DOMContentLoaded', recalc, false);
})(document, window);

不管是PC还是移动端

我们一般都会提一个 .overflow {overflow:hidden} 方便布局，也可以有效的阻止移动端上下左右拖动问题（溢出问题）