html,body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,fieldset,legend,p,blockquote,th,td,button,input {
    padding: 0;
    margin: 0;
}

img,body,html {
    border: none;
}

ul,ol {
    list-style: none;
}

img {
    /** 底部留白 */
    display: block;
    border: 0;
}

b,strong {
    font-weight: 400;
}

h1,h2,h3,h4,h5,h6 {
    /** 相对于父元素字体大小*/
    font-size: 100%;
    font-weight: normal;
}

i,em {
    font-style: normal;
}

u,ins,s,del {
    text-decoration: none;
}

table {
    border: 1px solid #999;
    /** 相当于cellspacing */
    border-spacing: 0;
    /** 1px边框 */
    border-collapse: collapse;
}

td,th {
    border: 1px solid #999;
}

input,button {
    /** 去掉轮廓线 */
    outline: none;
    border: none;
}

textarea {
    overflow: auto;
}