* {
    padding: 0;
    margin: 0;
}

button::after {
    border: none;
}

html, body, div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, code, form, fieldset, legend, input, textarea, p, blockquote, th, td {
    font-family: Helvetica, Tahoma, Arial, "Hiragino Sans GB", "Hiragino Sans GB W3", "Microsoft YaHei", STXihei, STHeiti, Heiti, SimSun, sans-serif;
}

button {
    outline: none;
}

a {
    text-decoration: none;
}

input:focus {
    outline: none;
}

ul li {
    list-style: none;
}