/* 清除浏览器默认样式 */

html {
    font-size: 20px;
}
body {
    background-color: #f4f4f4;
}
body,
ul,
li,
p,
h1,
h2,
h3,
h4,
h5,
h6 {
    margin: 0;
    padding: 0;
    list-style: none;
}

a {
    text-decoration: none;
}

input {
    outline: none;
    border: none;
}