body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,form,pre,fieldset,legend,input,textarea,button,p,blockquote,th,td{
    margin:0;
    padding:0;
}
body{
    background: #f1f1f1;
    text-align:center;
    font-family:Helvetica Neue Helvetica, Arial, Microsoft Yahei,Hiragino Sans GB,Heiti SC,WenquanYi Micro Hei,sans-serif;
}
li{
    list-style:none;
}
a{
    text-decoration:none;
}
img{
    border:none;
}
html{
    overflow-y:srcoll;
}