body {
    background: url(https://img0.baidu.com/it/u=561041293,259965800&fm=26&fmt=auto&gp=0.jpg) fixed;
}

#home {
    margin: 0 auto;
    width: 95%;
    min-width: 930px;
    background-attachment: scroll;
    background: url(https://img0.baidu.com/it/u=2892804069,2700133627&fm=26&fmt=auto&gp=0.jpg) fixed;
    background-position: 50% 0%;
}