css litany of these parameters, in fact, these so-called css programmer wanted to do something every day, and they put these parameters lies at the heart, like c ++ programmer, these libraries lies at the heart, it is program.
css custom every individual components that are either independent of each other, the best are decoupled, if it is relatively low force designers, the design could not be decoupled is no way of things, css knowledge slow slowly accumulated, see css syntax see the climax!