* {
  -webkit-box-sizing: border-box;
     -moz-box-sizing: border-box;
          box-sizing: border-box;
}
*:before,
*:after {
  -webkit-box-sizing: border-box;
     -moz-box-sizing: border-box;
          box-sizing: border-box;
}
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;
}
body {
    background: #fff;
    color: #555;
    font-size: 14px;
    font-family: "Arial", "Microsoft YaHei", "黑体", "宋体", sans-serif;
}
td, th, caption {
    font-size: 14px;
}
h1, h2, h3, h4, h5, h6 {
    font-weight: normal;
    font-size: 100%;
}
address, caption, cite, code, dfn, em, strong, th, var {
    font-style: normal;
    font-weight: normal;
}
a {
    color: #555;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
img {
    border: none;
    vertical-align: middle;
}
ol, ul, li {
    list-style: none;
}
input, textarea, select, button {
    font: 14px "Arial", "Microsoft YaHei", "黑体", "宋体", sans-serif;
}
table {
    border-collapse: collapse;
}
html {
    overflow-y: scroll;
}
.clearfix:before,
.clearfix:after {
    content: " ";
    display: inline-block;
    height: 0;
    clear: both;
    visibility: hidden;
}
.clearfix {
    *zoom: 1;
}

/*公共类*/
.fl {
    float: left
}
.fr {
    float: right
}
.al {
    text-align: left
}
.ac {
    text-align: center
}
.ar {
    text-align: right
}
.hide {
    display: none
}

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