body {
    color: #000;
    background-color: #e6e6e6;
    font-family: "Helvetica Neue",Helvetica,Verdana,Arial,sans-serif;
    font-size: 12px;
    min-height: 101%;
    background: url(//images.cnblogs.com/cnblogs_com/hxd1017/1636871/o_200121063753233713wc44z849uwtc4k2u.jpg) fixed;
    opacity: 0.8;
}

/* 定制公告栏时钟位置 */
#clockdiv {
    /* left, center, right */
    text-align: center;
}

/* 定制返回顶部按键 */
#toTop {
    width: 50px;
    height: 30px;
    overflow: hidden;
    position: fixed;
    right: 150px;
    bottom: 20px;
    background-color: #fafafa;
    font: 14px/20px sans-serif;
    text-align: center;
    padding:10px 5px;
    margin-bottom: -10px;
}