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      • css教程之CSS 簡介

      • 2015-01-22 23:57 來源:未知
      CSS 簡介
      CSS 概述(相關css教程
      ·    CSS 指層疊樣式表 (Cascading Style Sheets)
      ·    樣式定義如何顯示 HTML 元素
      ·    樣式通常存儲在樣式表
      ·    把樣式添加到 HTML 4.0 中,是為了解決內容與表現分離的問題
      ·    外部樣式表可以極大提高工作效率
      ·    外部樣式表通常存儲在 CSS 文件
      ·    多個樣式定義可層疊為一
      CSS 語法
      CSS 規則由兩個主要的部分構成:選擇器,以及一條或多條聲明。
      selector {declaration1; declaration2; ... declarationN }
      選擇器通常是您需要改變樣式的 HTML 元素。
      每條聲明由一個屬性和一個值組成。
      屬性(property)是您希望設置的樣式屬性(style attribute)。每個屬性有一個值。屬性和值被冒號分開。
      selector {property: value}
      下面這行代碼的作用是將 h1 元素內的文字顏色定義為紅色,同時將字體大小設置為 14 像素。
      在這個例子中,h1 是選擇器,color 和 font-size 是屬性,red 和 14px 是值。
      h1 {color:red; font-size:14px;}
      下面的示意圖為您展示了上面這段代碼的結構:
      CSS 語法
      提示:請使用花括號來包圍聲明。
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