CSSO(CSSOptimizer)是一个CSS最小化压缩工具，不仅对CSS做压缩还对CSS进行结构分析，生成更小的文件。
安全转换：
RemovalofwhitespaceRemovaloftrailing;RemovalofcommentsRemovalofinvalid@charsetи@importdeclarationsMinificationofcolorpropertiesMinificationof0Minificationofmulti-linestringsMinificationofthefont-weightproperty结构优化：
MergingblockswithidenticalselectorsMergingblockswithidenticalpropertiesRemovalofoverriddenpropertiesRemovalofoverriddenshorthandpropertiesRemovalofrepeatingselectorsPartialmergingofblocksPartialsplittingofblocksRemovalofemptyrulesetandat-ruleMinificationofmarginandpaddingproperties
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