body {
    background: url(https://images.cnblogs.com/cnblogs_com/G-Heizi/2083068/o_211222064449_%E6%B5%B7%E8%B4%BC%E7%8E%8B_1.jpg) fixed;
    background-repeat: no-repeat;
    background-size: 100% 100%;
}
#home{
    width:1400px;
}
#sideBar{
    margin-left:1050px;
}
#mainContent{
    width: 1080px;
}
#main{
    opacity:90%;
}
#navigator {
    opacity:90%;
}
#blogTitle h2{
    margin-left:1.5rem;
}