常用的默认样式重置

body,p,h1,h2,h3,h4,h5,h6,ul,ol,dl,dd,figure{margin:0; font-family:Arial,"宋体";}
ul,ol{padding:0;list-style:none;}
a{text-decoration:none;}
h1,h2,h3,h4,h5,h6,strong{ font-weight:normal;}
em{ font-style:normal;}
mark{background:none;}
img{ vertical-align:top;border:none;}
strong{ font-weight:normal;}

table{ border-collapse:collapse;}
td,th{padding:0;}

表单：

form{border:1px solid #000; margin:0;}
input{margin:0;padding:0; border:1px solid #ccc;}
textarea{margin:0;padding:0; resize:none; overflow:auto; outline:none;}
select{padding:0;}

清浮动：

.clear{zoom:1;}
.clear:after{content:"";display:block;clear:both;}