純CSS實現小圓點和三角形圖案

運用所學的CSS技術，制作各種方向的網頁小三角，還有小圓點的功能，小圓點的控制比較方便，可以用font-size控制圓點的大小，小三角是基于網頁的特殊符號“◆”用CSS控制邊角實現，也是挺實用的，現此將完整的代碼分享給大家，也希望高人們能找到更簡單有效的方法。

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