css 默认

body, div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, code, form, fieldset, legend, input, button, textarea, p, blockquote, th, td { margin:0; padding: 0; }
fieldset, img { border: 0; }
:focus { outline: 0; }
h1, h2, h3, h4, h5, h6 { font-size: 100%; font-weight: normal; }
input, button, textarea, select, optgroup, option { font-family: inherit; font-size: inherit; font-style: inherit; font-weight: inherit; }
input, button, textarea, select { *font-size: 100%;}
textarea { overflow:auto; }
body { line-height: 1.5; }
ol, ul { list-style: none; }
:link, :visited, ins { text-decoration: none; }
body {
  font: 14px/1.5 "Microsoft Yahei", "Hiragino Sans GB", Helvetica, "Helvetica Neue", "微软雅黑", Tahoma, Arial, sans-serif;
  color: #14191e;
}