#home h1{
    font-size:45px;
}
body{
    background-image: url("https://img2020.cnblogs.com/blog/756484/202009/756484-20200905220449424-442860450.png"); 
    background-position: initial; 
    background-size: 180px; 
    background-repeat: repeat; 
    background-attachment: fixed; 
    background-origin: 
    initial; background-clip: initial;
    height:100%;
    width:100%;
}
#home{    opacity:1;　　}