font: 300 12px/24px "宋体",arial,serif;

http://ronqi.iteye.com/blog/1155781

http://leepiao.blog.163.com/blog/static/485031302010112345725517/

http://www.cnblogs.com/mybest/archive/2012/02/24/2366232.html

http://www.w3pop.com/learn/view/doc/tag_font

http://www.w3school.com.cn/tags/tag_font.asp

http://www.w3school.com.cn/css/css_text.asp