#qq {
    color: red;
    font-size: 18px;
}

/* 定制博客背景图片，url里面是你的图片位置信息 */
body { 
     background-color: #efefef;
     background-image:url(https://images.cnblogs.com/cnblogs_com/shwee/1218109/o_bg_shw.jpg); 
     background-repeat: no-repeat; 
     background-attachment: fixed; 
     background-position: center 0; 
     background-size: cover; 
    padding-top:0px;
  }
/* 定制返回顶部按键 */
#toTop {
    background: url(//https://images.cnblogs.com/cnblogs_com/shwee/1218109/o_toTop.bmp) no-repeat 0px top;
    width: 57px;
    height: 57px;
    overflow: hidden;
    position: fixed;
    right: 180px;
    bottom: 20px;
    cursor: pointer;
}