背景图片方面，因为需要的是一个图片链接，所以可以上传到相册，然后点开那张图片右键复制图片链接，在页面定制css里面
body{background: url(你的图片链接) ;
}
就可以了
皮肤我用的BLACKLOWKEY
具体美化代码如下
body{background: url(https://www.cnblogs.com/images/cnblogs_com/chenguosong/1438087/o_rt.jpg) top center;
font-size:20px;
font-family: "verdana","ms song","宋体","Arial","微软雅黑", "Helvetica", "sans-serif";
}
sideBarMain{
background:rgba(250,250,250,0.8);
font-size:12px;
}
blogTitle{
font-family: "verdana","ms song","宋体","Arial","微软雅黑", "Helvetica", "sans-serif";
}
navigator{
background:rgb(80,90,100);
}
navList{
margin-left: 100px;}
mainContent{
opacity:0.9;
margin: 20px;
font-size:10px;
font-family: "verdana","ms song","宋体","Arial","微软雅黑", "Helvetica", "sans-serif";
}
main{
background:rgba(250,250,250,0.5);
margin-top: 20px;
filter:alpha(opacity=40);}
blogTitle h2{
color: #000;
text-shadow: 0 1px 1px #fff;
}
其实也就是把各个盒子的位置和背景做了调整，然后用了透明度让一体化更强。