/* 样式初始化 */
* {
    padding: 0;
    margin: 0;
}

ul,
li {
    list-style: none;
}

a {
    text-decoration: none;
}

.clearfix:after {
    content: "020";
    display: block;
    height: 0;
    clear: both;
    visibility: hidden;
}

.clearfix {
    /* 触发 hasLayout */
    zoom: 1;
}