#home {
opacity: 0.80;
    margin: 0 auto;
        margin-top: 0px;
        margin-bottom: 0px;
    width: 72%;
    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);
}
body {
    background: url("https://wx2.sinaimg.cn/large/70475df7ly1fpnogjrl3cj21hc0u0e82.jpg");
        background-repeat: repeat;
        background-attachment: scroll;
        background-size: auto auto;
    background-repeat: no-repeat;
    background-attachment: fixed;
    size: auto;
    width: auto;
    background-size: cover;
}