#home {
    margin: 0 auto;
    width: 80%;/*原始65*/
    min-width: 980px;/*页面顶部的宽度*/
    background-color: rgba(245, 245, 245, 0.5);
    padding: 30px;
    margin-top: 50px;
    margin-bottom: 50px;
    box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}
body {
    background: rgba(245, 245, 245, 0.5) url('https://images.cnblogs.com/cnblogs_com/zhouxiaoyu98/1777401/o_200531045205%E6%9C%AA%E6%A0%87%E9%A2%98-74.jpg') fixed no-repeat;   //修改背景图片
    background-position: 80% 10%; 
    background-size: cover;
   opacity: 0.8;
}
#blogTitle {
    height: 100px;  /*高度*/
    clear: both;
    background-color: rgba(240,255,255,0.7);   //博客标题的背景
}