html页面css初始化，以及清除css浮动

第一个版本 

body{ margin:0; padding:0; font:14px/1.5 "Microsoft YaHei",Tahoma,Arial,"宋体"; color:#333} 
form,ul,li,ol,dl,dt,dd,p,i,h1,h2,h3,h4,h5,h6{ margin:0; padding:0}
ul,li{ list-style:none}  img{ border:0} 
.divc{ margin:0 auto} em,i{ font-style:normal}
.dp{ display:block} .fl{ float:left} .fr{ float:right}
.cl{ clear:both; height:0; font-size:0; overflow:hidden}
.fb{ font-weight:bold}  .tc{ text-align:center}
.mt10{ margin-top:10px} .mt5{ margin-top:5px} 
.red{ color:#e01e15}  .w1440{ width:1440px} 
.cor_bs{ color: #fff;} .w1200{ width:1200px} 
a{color:#333; text-decoration:none}   
a.bsx:link,a.bsx:visited{ color:#dddddd; text-decoration:none} 
a.bsx:hover,a.bsx:active{ color:#dddddd; text-decoration:none}
a.his:link,a.his:visited{ color:#6a6a6a; text-decoration:none} 
a.his:hover,a.his:active{ color:#6a6a6a; text-decoration:none}
a.csl:link,a.csl:visited{ color:#333; text-decoration:none} 
a.csl:hover,a.csl:active{ color:#ff8a00; text-decoration:none}
a.csl_c:link,a.csl_c:visited{ color:#ff8a00; text-decoration:none} 
a.csl_c:hover,a.csl_c:active{ color:#ff8a00; text-decoration:none}
.clearfix:after{content:"."; display:block; visibility:hidden; height:0; clear:both}

引用浮动

<div class="navflotleft clearfix"></div>

第二版本

body,
div,
dl,
dt,
dd,
ul,
ol,
li,
h1,
h2,
h3,
h4,
h5,
h6,
pre,
form,
fieldset,
input,
textarea,
p,
blockquote,
th,
td {
  margin: 0;
  padding: 0;
  font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
}
@font-face {
  font-family: Source Han Sans;
  src: url("../font/SourceHanSansCN-Normal.otf");
}
a {
  text-decoration: none !important;
  display: inline-block;
}
ul {
  list-style: none;
}
ul li {
  float: left;
}
.clearfix {
  zoom: 1;
}
.clearfix:after {
  clear: both;
  height: 0;
  overflow: hidden;
  display: block;
  visibility: hidden;
  content: "";
}
.fl {
  float: left;
}

.fr {
  float: right;
}
img {
  border: 0;
  vertical-align: middle;
}