html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, font, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td ,header,section,footer{
    margin: 0;
    padding: 0;
    border: 0;
    outline: 0;
    font-size: 100%;
    
}
table {
    border-collapse:collapse;
    border-spacing:0;
}
fieldset, img {
    border:0;
    vertical-align: middle;
}
h1,h2,h3,h4,h5,h6,pre{
    font-size:100%;
}
ol,ul{
    list-style:none;
}
a,:link,:visited{ 
    text-decoration:none;
    color: #000;
}
a,button,input[type='button']{
    cursor:pointer;
}
input{  
    background:none;  
    outline:none;  
    border:none;
}
input:focus{   
    border:none;
}
/*清除浮动*/
.clearfix:after {
    content:".";
    display:block;
    height:0;
    visibility:hidden;
    clear:both;
  }
  .clearfix {
    *zoom:1;
  }