body,div,dl,dt,dd,ul,li,ol,h1,h2,h3,h4,h5,h6,pre,form,fieldset,legend,input,textarea,button,p,blockquote,th,td{
    margin: 0;
    padding: 0;
}
body{
    text-align: center;
    min-width: 1226px;
}
ol,
ul,
li {
    list-style: none;
}
a{
    text-decoration: none;
}
input,button,img{
    border: none;
    /* 基线的相对垂直对齐 */
    vertical-align: middle;
}