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pixels/16=em All CSS Pseudo Elements 阅读全文
posted @ 2019-01-09 15:10
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CSS selectors are used to "find" (or select) HTML elements based on their element name, id, class, attribute, and more. p, h1 { color: red; } id选择器 #i 阅读全文
posted @ 2019-01-09 09:36
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