body,div,dt,dl,ol,ul,li,h1,h2,h3,h4,h5,h6,input,form,a,p,textarea{
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif,'微软雅黑';  
}
ul,li,ol{
    list-style: none;
}

img{
    border: 0;
   
}
.cleanfloat{
    zoom: 1;
}
/* 给页面尾部添加一个块级元素，清除浮动。 */
.clearfloat::after{      
    display: block;
    clear: both;
    content: "";
    visibility: hidden;
    height: 0;
}