/* 专门用来重置浏览器默认样式的 */
body, p,ul,li,h1,h2,h3,h4,h5,h6,input{
    margin: 0;
    padding: 0;
}

input {
    outline: none;
}
li {
    list-style: none;
}

a {
    text-decoration: none;
}