这是陌生的师父教我的，他说这是他十年的功力，我要好好的领悟，也谢谢这位陌生的师父。
呵，看你是有慧根，所以不用从头教。几句话你就会了。
写表现层代码，跟你写类一样，语义化很重要，再有就是表现层的代码是先构造灵活的结构层(html)，再
写css的，你练上几拳就会了，而结构层的代码除了命名要语义化，还要考虑模块化，尽可能使你的构造
能重用。
比如一个图文混排的代码如下：
- newstitle
你跟据这个结构定义的css就是
#news {}
#news p {}
#news ul {}
...
这就是模块化、语义化
不要写太多的id，id是用来标识内容主体的，除非它是特殊内容，否则减少使用
id和class名
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