* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Microsoft YaHei", Arial, -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", STHeiti, Tahoma, Simsun, sans-serif, Helvetica;
    -webkit-font-smoothing: antialiased;
}

li {
    list-style: none;
}

a {
    text-decoration: none;
}

img {
    width: 100%;
    height: auto;
    border: 0;
    vertical-align: middle;
}

.clearfix::after {
    visibility: hidden;
    content: "";
    display: block;
    clear: both;
    height: 0;
}

.clearfix {
    zoom: 1;
}