Optimized blog CSS

The line spacing is too narrow, and the distance between the text and the border is also large, so it looks comfortable. The original layout was too dull and changed the color of some text, so it looked angry. The csdn blog does not have the paging function. If there are too many articles in a column and there is a link to show all the documents at the bottom, you will not pay attention to it if you are not careful, the document category on the left menu is not very good because it is under the fixed links of announcements and csdn blogs, so I thought of a way to bring up the Document menu and change the link to the mode of displaying all documents. But as the document grows, I don't know what will happen in the future, I cannot figure out why there is no paging function.