css样式重置

/**
 * Eric Meyer's Reset CSS v2.0 (http://meyerweb.com/eric/tools/css/reset/)
 * http://cssreset.com
 */
 
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video{
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  font-weight: normal;
  vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section{
  display: block;
}
ol, ul, li{
  list-style: none;
}
blockquote, q{
  quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after{
  content: '';
  content: none;
}
table{
  border-collapse: collapse;
  border-spacing: 0;
}
 
/* custom */
a{
  color: #7e8c8d;
  text-decoration: none;
  -webkit-backface-visibility: hidden;
}
::-webkit-scrollbar{
  width: 5px;
  height: 5px;
}
::-webkit-scrollbar-track-piece{
  background-color: rgba(0, 0, 0, 0.2);
  -webkit-border-radius: 6px;
}
::-webkit-scrollbar-thumb:vertical{
  height: 5px;
  background-color: rgba(125, 125, 125, 0.7);
  -webkit-border-radius: 6px;
}
::-webkit-scrollbar-thumb:horizontal{
  width: 5px;
  background-color: rgba(125, 125, 125, 0.7);
  -webkit-border-radius: 6px;
}
html, body{
  width: 100%;
  font-family: "Arial", "Microsoft YaHei", "黑体", "宋体", "微软雅黑", sans-serif;
}
body{
  line-height: 1;
  -webkit-text-size-adjust: none;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
html{
  overflow-y: scroll;
}
 
/*清除浮动*/
.clearfix:before,
.clearfix:after{
  content: " ";
  display: inline-block;
  height: 0;
  clear: both;
  visibility: hidden;
}
.clearfix{
  *zoom: 1;
}
 
/*隐藏*/
.dn{
  display: none;
}