body {
    font-family: Helvetica,Verdana,Arial,sans-serif;
}
body {
    color: #000;
    background-color: #e6e6e6;
    font-family: "Helvetica Neue",Helvetica,Verdana,Arial,sans-serif;
    font-size: 12px;
    min-height: 101%;
}
body {
    color: #000;
    background-color: #e6e6e6;
    font-family: "Helvetica Neue",Helvetica,Verdana,Arial,sans-serif;
    font-size: 12px;
    min-height: 101%;
    background: url(https://images.cnblogs.com/cnblogs_com/cuimama/1523015/o_1.jpg) fixed;
}
body {
    color: #000;
    background-color: #e6e6e6;
    font-family: "Helvetica Neue",Helvetica,Verdana,Arial,sans-serif;
    font-size: 12px;
    min-height: 101%;
}
body {
    font-family: Helvetica,Verdana,Arial,sans-serif;
}
* {
    margin: 0;
    padding: 0;
}
* {
    margin: 0;
    padding: 0;
}
user agent stylesheet
body {
    display: block;
    margin: 8px;
}

#home {
    opacity: 0.7;
    margin: 0 auto;
    width: 65%;
    min-width: 950px;
    background-color: #fff;
    padding: 30px;
    margin-top: 50px;
    margin-bottom: 50px;
    box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}