body {
    padding-top: 100px;
    font-family: Helvetica, Tahoma, Arial, STXihei, "华文细黑", "Microsoft YaHei", "微软雅黑", SimSun, "宋体", Heiti, "黑体", sans-serif;
}

.footer {
    clear: both;
    margin: 0 auto;
    padding: 10px 0 20px 0;
    border-top: 4px solid #f0f0f0;
    text-align: center;
    color: #808080;
    font-size: 0.9em;
    bottom: 0;
}