html, body{
    height: 100%;
    width: 100%;
}
body, div, dl, dt, dd, li, ul, ol, h1, h2, h3, h4, h5, h6, pre, code, form, fieldset, legend, input, textarea, p, blockquote, th, td, hr, button, article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section{
    margin: 0; 
    padding: 0;
    box-sizing: border-box;
}
body{
    color: #666;
    font-weight: 500;
    font-family: -apple-system,"Helvetica Neue",Helvetica,Arial,"PingFang SC","Hiragino Sans GB",STHeiti,"Microsoft YaHei","Microsoft JhengHei",SimSun,sans-serif !important;
    font-size: 16px;
    background-color: #ffffff;
}
h1, h2, h3, h4, h5, h6 {
    font-family: inherit;
    font-weight: 500;
    /* line-height: 1.1; */
    color: inherit;
}
a {
    color: #666;
    text-decoration: none;
    background-color: transparent;
    font-weight: 500;
}
a:hover, a:focus{
    color:#3399ff;
}
a:active, a:hover, a:focus{
    outline: 0;
}
input, button, select, textarea{
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
}
img {
    border: none;
    vertical-align: middle;
}
ol, ul, li {
    list-style: none;
}
input,
textarea,
select,
button {
    font-family: -apple-system,"Helvetica Neue",Helvetica,Arial,"PingFang SC","Hiragino Sans GB",STHeiti,"Microsoft YaHei","Microsoft JhengHei",SimSun,sans-serif !important;
    font-size: 16px;
    background-color: transparent;
    border: none;
}
button:focus,
textarea:focus {
    outline: none;
}
input:focus{
    outline: none;
}
input::-webkit-input-placeholder {
    color: #999;
}
input:-moz-placeholder {
    color: #999;
}input::-moz-placeholder  {
    color: #999;
}input:-ms-input-placeholder {
    color: #999;
}