CSS语法增强编译器

Allows use of variables and block inclusions as well as arbitrarily nested blocks Example syntax: ``` /* sample.cssx */ $red = #f00; $block = { div { padding: 10px; } color: $red; border-width: 1px; margin: 20px 10px 15px 0; } .warning { color: $red; } .content { .warning { width: 200px; } cite { @rule($block); } p { span.tooltip { color: blue; } font-size: 1.1em; } .header { @rule($block); font-size: 0.8em; } font-family: Verdana, Arial, sans-serif; } ```