body,ul,h1,h2,h3,h4,h5,h6{
    margin: 0;
    padding: 0;
}
h1,h2,h3,h4,h5,h6{
    font-size:100%;
    font-weight:normal;
}
a{
    text-decoration:none;
}
ul{
    list-style:none;
}
img{
    border:0px;
}

/* 清除浮动，解决margin-top塌陷 */
.clearfix:before,.clearfix:after{
    content:'';
    display:table;    
}
.clearfix:after{
    clear:both;
}
.clearfix{
    zoom:1;
}

.fl{
    float:left;
}
.fr{
    float:right;
}