body, div, ul, li, ol, h1, h2, h3, h4, h5, h6, input, textarea, select, p, dl, dt, dd, a, img, button, form, table, th, tr, td, tbody, article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section {
    margin: 0;
    padding: 0;
}
ul,li{
    list-style-type: none;
}
.clearfix:after {
    content: "";
    display: block;
    visibility: hidden;
    height: 0;
    clear: both;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    SimSun, sans-serif;
}
img {
    width: 100%;
    content: normal;
    vertical-align: top;
}
ul {
    list-style: none;
}
a {
    text-decoration: none;
}