1.正方形

.div {width: 100px;height: 100px;background: red;}

2.矩形

.div {width: 200px;height: 100px;background: red;}

3.圓形

.div {width: 100px;height: 100px;background: red;-moz-border-radius: 50px;-webkit-border-radius: 50px;border-radius: 50px;}

4.橢圓

.div {width: 200px;height: 100px;background: red;-moz-border-radius: 100px / 50px;-webkit-border-radius: 100px / 50px;border-radius: 100px / 50px;}

5.上三角

.div {width: 0;height: 0;border-left: 50px solid transparent;border-right: 50px solid transparent;border-bottom: 100px solid red;}

6.下三角

.div {width: 0;height: 0;border-left: 50px solid transparent;border-right: 50px solid transparent;border-top: 100px solid red;}

7.左三角

.div {width: 0;height: 0;border-top: 50px solid transparent;border-right: 100px solid red;border-bottom: 50px solid transparent;}

8.右三角

.div {width: 0;height: 0;border-top: 50px solid transparent;border-left: 100px solid red;border-bottom: 50px solid transparent;}

9.三角形左上

.div {width: 0;height: 0;border-top: 100px solid red;border-right: 100px solid transparent;}

10.三角形右上

.div {width: 0;height: 0;border-top: 100px solid red;border-left: 100px solid transparent;}

11.三角形左下

.div {width: 0;height: 0;border-bottom: 100px solid red;border-right: 100px solid transparent;}

12.三角形右下

.div {width: 0;height: 0;border-bottom: 100px solid red;border-left: 100px solid transparent;}

13.彎尾箭頭

.div { position: relative; width: 0; height: 0; border-top: 9px solid transparent; border-right: 9px solid red; -webkit-transform: rotate(10deg); -moz-transform: rotate(10deg); -ms-transform: rotate(10deg); -o-transform: rotate(10deg);}

.div:after { content: ""; position: absolute; border: 0 solid transparent; border-top: 3px solid red; border-radius: 20px 0 0 0;top: -12px; left: -9px; width: 12px; height: 12px; -webkit-transform: rotate(45deg); -moz-transform: rotate(45deg); -ms-transform: rotate(45deg); -o-transform: rotate(45deg);}

14.梯形

.div {border-bottom: 100px solid red;border-left: 50px solid transparent;border-right: 50px solid transparent;height: 0;width: 100px;}

15.平行四邊形

.div {width: 150px;height: 100px;-webkit-transform: skew(20deg);-moz-transform: skew(20deg);-o-transform: skew(20deg);background: red;}

16.六角星

?

.div {width: 0;height: 0;border-left: 50px solid transparent;border-right: 50px solid transparent;border-bottom: 100px solid red;position: relative;}

.div:after {width: 0;height: 0;border-left: 50px solid transparent;border-right: 50px solid transparent;border-top: 100px solid red;position: absolute;content: "";top: 30px;left: -50px;}

17.五角星

.div { margin: 50px 0; position: relative; display: block; color: red; width: 0px; height: 0px; border-right: 100px solid transparent; border-bottom: 70px solid red; border-left: 100px solid transparent; -moz-transform: rotate(35deg);-webkit-transform: rotate(35deg); -ms-transform: rotate(35deg); -o-transform:rotate(35deg);}

.div:before { border-bottom: 80px solid red; border-left: 30px solid transparent; border-right: 30px solid transparent; position: absolute; height: 0; width: 0; top: -45px;left: -65px;display: block;content: ‘‘; -webkit-transform: rotate(-35deg);-moz-transform: rotate(-35deg); -ms-transform:rotate(-35deg);-o-transform:rotate(-35deg);}

.div:after { position: absolute; display: block; color: red; top: 3px; left: -105px;width: 0px;height: 0px;border-right:100px solid transparent; border-bottom:70px solid red;border-left: 100px solid transparent;-webkit-transform: rotate(-70deg); -moz-transform: rotate(-70deg); -ms-transform: rotate(-70deg);-o-transform: rotate(-70deg);content: ‘‘;}

18，桃心

.div {position: relative;width: 100px;height: 90px;}

.div:before,#heart:after { position: absolute;content: ""; left: 50px;top: 0;width: 50px;height: 80px;background: red; -moz-border-radius: 50px 50px 0 0; border-radius: 50px 50px 0 0;-webkit-transform: rotate(-45deg);-moz-transform: rotate(-45deg); -ms-transform: rotate(-45deg); -o-transform: rotate(-45deg);transform: rotate(-45deg); -webkit-transform-origin: 0 100%;-moz-transform-origin: 0 100%;-ms-transform-origin: 0 100%; -o-transform-origin: 0 100%; transform-origin: 0 100%;}

.div:after { left: 0; -webkit-transform: rotate(45deg); -moz-transform: rotate(45deg); -ms-transform: rotate(45deg); -o-transform: rotate(45deg); transform: rotate(45deg); -webkit-transform-origin: 100% 100%;-moz-transform-origin: 100% 100%; -ms-transform-origin: 100% 100%; -o-transform-origin: 100% 100%; transform-origin :100% 100%;}

19.無限符號

.div {position: relative; width: 212px; height: 100px;}

.div:before,.div:after {content: ""; position: absolute; top: 0; left: 0; width: 60px;height: 60px;border: 20px solid red; -moz-border-radius: 50px 50px 0 50px;border-radius: 50px 50px 0 50px;-webkit-transform: rotate(-45deg);-moz-transform: rotate(-45deg);-ms-transform: rotate(-45deg); -o-transform: rotate(-45deg);transform: rotate(-45deg);}

.div:after { left: auto; right: 0; -moz-border-radius: 50px 50px 50px 0;border-radius: 50px 50px 50px 0; -webkit-transform: rotate(45deg); -moz-transform: rotate(45deg); -ms-transform: rotate(45deg);-o-transform: rotate(45deg);transform: rotate(45deg);}

20.氣泡聊天

.div {width: 120px; height: 80px;background: red;position: relative;-moz-border-radius:10px; -webkit-border-radius: 10px;border-radius: 10px;}

.div:before {content:"";position: absolute;right: 100%;top: 26px;width: 0; height: 0;border-top: 13px solid transparent; border-right: 26px solid red;border-bottom: 13px solid transparent;}

21.搜索符號

.div{ font-size: 10em; /* This controls the size. */ display: inline-block; width: 0.4em; height: 0.4em; border: 0.1em solid red; position: relative; border-radius: 0.35em;}

.div::before{ content: ""; display: inline-block; position: absolute; right: -0.25em; bottom: -0.1em; border-width: 0; background: red; width: 0.35em; height: 0.08em; -webkit-transform: rotate(45deg); -moz-transform: rotate(45deg); -ms-transform: rotate(45deg); -o-transform: rotate(45deg);}

22.錐形

.div {width: 0;height: 0;border-left: 70px solid transparent;border-right: 70px solid transparent;border-top: 100px solid red; -moz-border-radius: 50%; -webkit-border-radius: 50%;border-radius: 50%;}

23.月亮

.div { width: 80px;height: 80px;border-radius: 50%;box-shadow: 15px 15px 0 0 red;}

24.十字架

.div {background: red;height: 100px;position: relative;width: 20px;}

.div:after { background: red;content: "";height: 20px;left: -40px;position: absolute;top:40px;width: 100px;}

原文：http://www.cnblogs.com/jinglover/p/5605957.html

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