#home {
    margin: 0 auto;
    width: 90%;
    min-width: 950px;
    background-color: #fff;
    padding: 30px;
    margin-top: 250px;
    margin-bottom: 50px;
    box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}

body {
  background:url("https://files.cnblogs.com/files/AdaminXie/log_tmp.bmp");
  background-repeat:no-repeat;
  margin: 0;
}