body, p, ul, ol, input, button, h1, h2, h3, h4, h5, h6, textarea, th, td, hr {
    margin: 0;
    padding: 0;
    color: #000;
    font-size: 14px;
    font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
}

li {
    list-style: none;
    font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
}

em, b, i, strong, h1, h2, h3, h4, h5, h6 {
    font-style: normal;
    font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
    font-weight: normal;
}

a {
    outline: none;
    text-decoration: none;
    font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
}

img {
    border: none;
    vertical-align: top;
}

input, button, textarea, em {
    background: none;
    border: none;
    outline: none;
    overflow: hidden;
    resize: none;
    font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
}

button {
    cursor: pointer;
}

/* 以下两句会让单元格间没有空白间隙 */
table {
    border-collapse: collapse
}

th, td {
    border: 1px solid black;
}

.clear:after {
    content: "";
    display: block;
    clear: both;
}

.clear {
    zoom: 1;
}