去除浏览器对html的附加样式，避免不同浏览器之间的样式差异，给前端开发提供统一的样式基础。附加样式：
.clearfix - 清除浮动
.wordsBreak - 允许文本在任意位置的换行
.ellipsis - 超长文本截断，以省略号显示
@charset "utf-8";
body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,form,input,button,textarea,p,table,th,td,section,img{
margin:0;
padding:0;
-moz-box-sizing: border-box;
-webkit-box-sizing: border-box;
box-sizing: border-box;
}
article, aside, details, figcaption, figure, footer, header, menu, nav, section {
display: block;
margin:0;
padding:0;
-moz-box-sizing: border-box;
-webkit-box-sizing: border-box;
box-sizing: border-box;
}
ol,ul,li,dl,dt,dd {
list-style:none;
}
button, input, select, textarea {
font-family: Helvetica,Tahoma,Arial,"Helvetica Neue","Hiragino Sans GB","Microsoft YaHei";
-webkit-appearance:none;
-moz-appearance:none;
appearance:none;
outline: none;
border-radius: 0;
border: 1px solid #ccc;
}
i,em{
font-style:normal;
}
img {
border:none;
}
table{
border-collapse:collapse;
border-spacing:0;
}
html,body {
width: 100%;
height: 100%;
background: #fff;
font-size: 14px;
line-height: 1.4;
font-family: Helvetica,Tahoma,Arial,"Helvetica Neue","Hiragino Sans GB","Microsoft YaHei";
color: #313135;
-webkit-text-size-adjust:100%;
-ms-text-size-adjust: 100%;
text-rendering: optimizelegibility;
}
a,a:hover,a:link,a:visited,a:active {
color: #313135;
text-decoration:none;
}
p,.wordsBreak{
word-wrap:break-word;
word-break:break-all;
}
.clearfix:after {
content: ".";
display: block;
height:0;
clear:both;
visibility: hidden;
}
.clearfix {
*zoom:1;
}
.ellipsis{
overflow: hidden;
white-space: nowrap;
text-overflow: ellipsis;
}