Using the CSS @import Rule
 

you might want to consider splitting your style sheet up into several smaller CSS files. That�s when the @import rule can come in quite handy.

The @import rule is another way of loading a CSS file. You can use it in two ways. The simplest is within the header of your document, like so:

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do not use @import rule, for optimum performance use to include your style sheet

good post thanks

What's the REALLY difference between these 2 methods???

a)
b)