html,
body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
span,
div,
a,
ul,
ol,
li,
img,
button,
input {
    padding: 0;
    margin: 0;
}

body {
    font-size: 14px;
    font-family: "微软雅黑", "microsoft yahei";
}

.left {
    float: left;
}

.right {
    float: right;
}

a {
    text-decoration: none;
}

ul,
ol,
li {
    list-style: none;
}