body, h1, h2, h3, h4, h5, h6, hr, p, blockquote, dl, dt, dd, ul, ol, li, pre, form, fieldset, legend, button, input, textarea, th, td {
    margin: 0;
    padding: 0;
}
body, button, input, select, textarea {
    font: 14px/1.5 tahoma,arial,"微软雅黑";
}
h1, h2, h3, h4, h5, h6 {
    font-size: 100%;
}
li { list-style:none; }
img { border:none; }
a { text-decoration:none; }
.clear { zoom:1; }
.clear:after { content:''; display:block; clear:both; }