0、初始化样式

初始化样式，非原创，仅供个人学习参考<link href="base.css">

/* CSS Document */
html, body, div, span, object, iframe,h1, h2,
h3, h4, h5, h6, p, blockquote, pre,abbr, address, cite, code,del, dfn,
em, img, ins,kbd, q, samp,small, strong, sub, sup, var,b, i,dl, dt, dd,
ol, ul, li,fieldset, form, label, legend,table, caption, tbody,
tfoot,thead,tr, th, td,article, aside, canvas, details, figcaption,
figure, footer, header, hgroup, menu, nav, section, summary,time, mark,
audio, video {
    margin:0;
    padding:0;
    border:0;
    outline:0;
    font-size:100%;
    vertical-align:baseline;
    background:transparent;
    outline-style:none;/*FF*/
}

body {
    line-height:1;
}

a{
    margin:0;
    padding:0;
    border:0;
    font-size:100%;
    vertical-align:baseline;
    background:transparent;

}
a:hover,a:focus{
    text-decoration:none;
    bblr:expression(this.onFocus=this.blur());/*IE*/
    outline-style:none;/*FF*/
}
table {
    border-collapse:collapse;
    border-spacing:0;
}

input, select {
    vertical-align:middle;
}

/*css为clearfix，清除浮动*/
.clearfix::before,
.clearfix::after{
    content: "";
    height: 0;
    line-height: 0;
    display: block;
    visibility: hidden;
    clear: both;
}
.clearfix:after{clear:both;}
.clearfix{
    *zoom:1;/*IE/7/6*/
}