纯CSS画的基本图形（矩形、圆形、三角形、多边形、爱心、八卦等）

图形包括基本的矩形、圆形、椭圆、三角形、多边形，也包括稍微复杂一点的爱心、钻石、阴阳八卦等。当然有一些需要用到CSS3的属性，所以在你打开这篇文章的时候，我希望你用的是firefox或者chrome，当然IE也能看一部分的。那好，下面就一起来看看我们是如何用纯CSS来画这些图形的，如果你也觉得很震撼，推荐给你的朋友吧。
#square {
width: 100px;
height: 100px;
background: red;
}
#rectangle {
width: 200px;
height: 100px;
background: red;
}
#circle {
width: 100px;
height: 100px;
background: red;
-moz-border-radius: 50px;
-webkit-border-radius: 50px;
border-radius: 50px;
}
#oval {
width: 200px;
height: 100px;
background: red;
-moz-border-radius: 100px / 50px;
-webkit-border-radius: 100px / 50px;
border-radius: 100px / 50px;
}
#triangle-up {
width: 0;
height: 0;
border-left: 50px solid transparent;
border-right: 50px solid transparent;
border-bottom: 100px solid red;
}
#triangle-down {
width: 0;
height: 0;
border-left: 50px solid transparent;
border-right: 50px solid transparent;
border-top: 100px solid red;
}
#triangle-left {
width: 0;
height: 0;
border-top: 50px solid transparent;
border-right: 100px solid red;
border-bottom: 50px solid transparent;
}
#triangle-right {
width: 0;
height: 0;
border-top: 50px solid transparent;
border-left: 100px solid red;
border-bottom: 50px solid transparent;
}
#triangle-topleft {
width: 0;
height: 0;
border-top: 100px solid red;
border-right: 100px solid transparent;
}
#triangle-topright {
width: 0;
height: 0;
border-top: 100px solid red;
border-left: 100px solid transparent;

}
#triangle-bottomleft {
width: 0;
height: 0;
border-bottom: 100px solid red;
border-right: 100px solid transparent;
}
#triangle-bottomright {
width: 0;
height: 0;
border-bottom: 100px solid red;
border-left: 100px solid transparent;
}
#parallelogram {
width: 150px;
height: 100px;
margin-left:20px;
-webkit-transform: skew(20deg);
-moz-transform: skew(20deg);
-o-transform: skew(20deg);
background: red;
}
#trapezoid {
border-bottom: 100px solid red;
border-left: 50px solid transparent;
border-right: 50px solid transparent;
height: 0;
width: 100px;
}
#star-six {
width: 0;
height: 0;
border-left: 50px solid transparent;
border-right: 50px solid transparent;
border-bottom: 100px solid red;
position: relative;
}
#star-six: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;
}
#star-five {
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);
}
#star-five: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);

}
#star-five: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: '';
}
#pentagon {
position: relative;
width: 54px;
border-width: 50px 18px 0;
border-style: solid;
border-color: red transparent;
}
#pentagon:before {
content: "";
position: absolute;
height: 0;
width: 0;
top: -85px;
left: -18px;
border-width: 0 45px 35px;
border-style: solid;
border-color: transparent transparent red;
}
#hexagon {
width: 100px;
height: 55px;
background: red;
position: relative;
}
#hexagon:before {
content: "";
position: absolute;
top: -25px;
left: 0;
width: 0;
height: 0;
border-left: 50px solid transparent;
border-right: 50px solid transparent;
border-bottom: 25px solid red;
}
#hexagon:after {
content: "";
position: absolute;
bottom: -25px;
left: 0;
width: 0;
height: 0;
border-left: 50px solid transparent;
border-right: 50px solid transparent;
border-top: 25px solid red;
}
#octagon {
width: 100px;
height: 100px;
background: red;
position: relative;
}

#octagon:before {
content: "";
position: absolute;
top: 0;
left: 0;
border-bottom: 29px solid red;
border-left: 29px solid #eee;
border-right: 29px solid #eee;
width: 42px;
height: 0;
}

#octagon:after {
content: "";
position: absolute;
bottom: 0;
left: 0;
border-top: 29px solid red;
border-left: 29px solid #eee;
border-right: 29px solid #eee;
width: 42px;
height: 0;
}
#heart {
position: relative;
width: 100px;
height: 90px;
}
#heart: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%;
}
#heart: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%;
}
#infinity {
position: relative;
width: 212px;
height: 100px;
}

#infinity:before,
#infinity: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);
}

#infinity: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);
}
#egg {
display:block;
width: 126px;
height: 180px;
background-color: red;
-webkit-border-radius: 63px 63px 63px 63px / 108px 108px 72px 72px;
border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
}
#pacman {
width: 0px;
height: 0px;
border-right: 60px solid transparent;
border-top: 60px solid red;
border-left: 60px solid red;
border-bottom: 60px solid red;
border-top-left-radius: 60px;
border-top-right-radius: 60px;
border-bottom-left-radius: 60px;
border-bottom-right-radius: 60px;
}
#talkbubble {
width: 120px;
height: 80px;
background: red;
margin-left:20px;
position: relative;
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
border-radius: 10px;
}
#talkbubble: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;
}
#burst-12 {
background: red;
width: 80px;
height: 80px;
position: relative;
text-align: center;
margin:20px 0 0 20px;
}
#burst-12:before, #burst-12:after {
content: "";
position: absolute;
top: 0;
left: 0;
height: 80px;
width: 80px;
background: red;

}
#burst-12:before {
-webkit-transform: rotate(30deg);
-moz-transform: rotate(30deg);
-ms-transform: rotate(30deg);
-o-transform: rotate(30deg);
transform: rotate(30deg);
}
#burst-12:after {
-webkit-transform: rotate(60deg);
-moz-transform: rotate(60deg);
-ms-transform: rotate(60deg);
-o-transform: rotate(60deg);
transform: rotate(60deg);
}
#burst-8 {
background: red;
width: 80px;
height: 80px;
position: relative;
text-align: center;
margin:20px 0 0 20px;
-webkit-transform: rotate(20deg);
-moz-transform: rotate(20deg);
-ms-transform: rotate(20deg);
-o-transform: rotate(20eg);
transform: rotate(20deg);
}
#burst-8:before {
content: "";
position: absolute;
top: 0;
left: 0;
height: 80px;
width: 80px;
background: red;
-webkit-transform: rotate(135deg);
-moz-transform: rotate(135deg);
-ms-transform: rotate(135deg);
-o-transform: rotate(135deg);
transform: rotate(135deg);
}
#cut-diamond {
border-style: solid;
border-color: transparent transparent red transparent;
border-width: 0 25px 25px 25px;
height: 0;
width: 50px;
position: relative;
margin: 20px 0 50px 0;
}
#cut-diamond:after {
content: "";
position: absolute;
top: 25px;
left: -25px;
width: 0;
height: 0;
border-style: solid;
border-color: red transparent transparent transparent;
border-width: 70px 50px 0 50px;
}
#yin-yang {
width: 96px;
height: 48px;
background: #eee;
border-color: red;
border-style: solid;
border-width: 2px 2px 50px 2px;
border-radius: 100%;
position: relative;
}

#yin-yang:before {
content: "";
position: absolute;
top: 50%;
left: 0;
background: #eee;
border: 18px solid red;
border-radius: 100%;
width: 12px;
height: 12px;
}

#yin-yang:after {
content: "";
position: absolute;
top: 50%;
left: 50%;
background: red;
border: 18px solid #eee;
border-radius:100%;
width: 12px;
height: 12px;
}
1、正方形

最终效果：
CSS代码如下：

#square { 
width: 100px; 
height: 100px; 
background: red; 
}

2、长方形
最终效果：
CSS代码如下：

#rectangle { 
width: 200px; 
height: 100px; 
background: red; 
}

3、圆形
最终效果：
CSS代码如下：

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

4、椭圆
最终效果：
CSS代码如下：

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

5、上三角
最终效果：



CSS代码如下：

#triangle-up { 
width: 0; 
height: 0; 
border-left: 50px solid transparent; 
border-right: 50px solid transparent; 
border-bottom: 100px solid red; 
}

6、下三角
最终效果：
CSS代码如下：

#triangle-down { 
width: 0; 
height: 0; 
border-left: 50px solid transparent; 
border-right: 50px solid transparent; 
border-top: 100px solid red; 
}

7、左三角
最终效果：
CSS代码如下：

#triangle-left { 
width: 0; 
height: 0; 
border-top: 50px solid transparent; 
border-right: 100px solid red; 
border-bottom: 50px solid transparent; 
}

8、右三角
最终效果：
CSS代码如下：

#triangle-right { 
width: 0; 
height: 0; 
border-top: 50px solid transparent; 
border-left: 100px solid red; 
border-bottom: 50px solid transparent; 
}

9、左上三角
最终效果：
CSS代码如下：

#triangle-topleft { 
width: 0; 
height: 0; 
border-top: 100px solid red; 
border-right: 100px solid transparent; 
}

10、右上三角
最终效果：
CSS代码如下：

#triangle-topright { 
width: 0; 
height: 0; 
border-top: 100px solid red; 
border-left: 100px solid transparent; 
}

11、左下三角
最终效果：
CSS代码如下：

#triangle-bottomleft { 
width: 0; 
height: 0; 
border-bottom: 100px solid red; 
border-right: 100px solid transparent; 
}

12、右下三角
最终效果：
CSS代码如下：

#triangle-bottomright { 
width: 0; 
height: 0; 
border-bottom: 100px solid red; 
border-left: 100px solid transparent; 
}

13、平行四边形
最终效果：
CSS代码如下：

#parallelogram { 
width: 150px; 
height: 100px; 
margin-left:20px; 
-webkit-transform: skew(20deg); 
-moz-transform: skew(20deg); 
-o-transform: skew(20deg); 
background: red; 
}

14、梯形
最终效果：
CSS代码如下：

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

15、六角星
最终效果：


CSS代码如下：

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

16、五角星
最终效果：
CSS代码如下：

#star-five { 
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); 
} 
#star-five: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); 
} 
#star-five: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: ''; 
}

17、五角大楼
最终效果：


CSS代码如下：

#pentagon { 
position: relative; 
width: 54px; 
border-width: 50px 18px 0; 
border-style: solid; 
border-color: red transparent; 
} 
#pentagon:before { 
content: ""; 
position: absolute; 
height: 0; 
width: 0; 
top: -85px; 
left: -18px; 
border-width: 0 45px 35px; 
border-style: solid; 
border-color: transparent transparent red; 
}

18、六边形
最终效果：


CSS代码如下：

#hexagon { 
width: 100px; 
height: 55px; 
background: red; 
position: relative; 
} 
#hexagon:before { 
content: ""; 
position: absolute; 
top: -25px; 
left: 0; 
width: 0; 
height: 0; 
border-left: 50px solid transparent; 
border-right: 50px solid transparent; 
border-bottom: 25px solid red; 
} 
#hexagon:after { 
content: ""; 
position: absolute; 
bottom: -25px; 
left: 0; 
width: 0; 
height: 0; 
border-left: 50px solid transparent; 
border-right: 50px solid transparent; 
border-top: 25px solid red; 
}

19、八角形
最终效果：
CSS代码如下：

#octagon { 
width: 100px; 
height: 100px; 
background: red; 
position: relative; 
} 
#octagon:before { 
content: ""; 
position: absolute; 
top: 0; 
left: 0; 
border-bottom: 29px solid red; 
border-left: 29px solid #eee; 
border-right: 29px solid #eee; 
width: 42px; 
height: 0; 
} 
#octagon:after { 
content: ""; 
position: absolute; 
bottom: 0; 
left: 0; 
border-top: 29px solid red; 
border-left: 29px solid #eee; 
border-right: 29px solid #eee; 
width: 42px; 
height: 0; 
}

20、爱心
最终效果：
CSS代码如下：

#heart { 
position: relative; 
width: 100px; 
height: 90px; 
} 
#heart: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%; 
} 
#heart: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%; 
}

21、无穷大符号
最终效果：



CSS代码如下：

#infinity { 
position: relative; 
width: 212px; 
height: 100px; 
} 
#infinity:before, 
#infinity: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); 
} 
#infinity: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); 
}

22、鸡蛋
最终效果
CSS代码如下：

#egg { 
display:block; 
width: 126px; 
height: 180px; 
background-color: red; 
-webkit-border-radius: 63px 63px 63px 63px / 108px 108px 72px 72px; 
border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%; 
}

23、食逗人（Pac-Man）
最终效果：
CSS代码如下：

#pacman { 
width: 0px; 
height: 0px; 
border-right: 60px solid transparent; 
border-top: 60px solid red; 
border-left: 60px solid red; 
border-bottom: 60px solid red; 
border-top-left-radius: 60px; 
border-top-right-radius: 60px; 
border-bottom-left-radius: 60px; 
border-bottom-right-radius: 60px; 
}

24、提示对话框
最终效果：



CSS代码如下：

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

25、12角星
最终效果：
CSS代码如下：

#burst-12 { 
background: red; 
width: 80px; 
height: 80px; 
position: relative; 
text-align: center; 
} 
#burst-12:before, #burst-12:after { 
content: ""; 
position: absolute; 
top: 0; 
left: 0; 
height: 80px; 
width: 80px; 
background: red; 
} 
#burst-12:before { 
-webkit-transform: rotate(30deg); 
-moz-transform: rotate(30deg); 
-ms-transform: rotate(30deg); 
-o-transform: rotate(30deg); 
transform: rotate(30deg); 
} 
#burst-12:after { 
-webkit-transform: rotate(60deg); 
-moz-transform: rotate(60deg); 
-ms-transform: rotate(60deg); 
-o-transform: rotate(60deg); 
transform: rotate(60deg); 
}

26、8角星
最终效果：
CSS代码如下：

#burst-8 { 
background: red; 
width: 80px; 
height: 80px; 
position: relative; 
text-align: center; 
-webkit-transform: rotate(20deg); 
-moz-transform: rotate(20deg); 
-ms-transform: rotate(20deg); 
-o-transform: rotate(20eg); 
transform: rotate(20deg); 
} 
#burst-8:before { 
content: ""; 
position: absolute; 
top: 0; 
left: 0; 
height: 80px; 
width: 80px; 
background: red; 
-webkit-transform: rotate(135deg); 
-moz-transform: rotate(135deg); 
-ms-transform: rotate(135deg); 
-o-transform: rotate(135deg); 
transform: rotate(135deg); 
}

27、钻石
最终效果：
CSS代码如下：

#cut-diamond { 
border-style: solid; 
border-color: transparent transparent red transparent; 
border-width: 0 25px 25px 25px; 
height: 0; 
width: 50px; 
position: relative; 
margin: 20px 0 50px 0; 
} 
#cut-diamond:after { 
content: ""; 
position: absolute; 
top: 25px; 
left: -25px; 
width: 0; 
height: 0; 
border-style: solid; 
border-color: red transparent transparent transparent; 
border-width: 70px 50px 0 50px; 
}

28、阴阳八卦（霸气的这个）



CSS代码如下：

#yin-yang { 
width: 96px; 
height: 48px; 
background: #eee; 
border-color: red; 
border-style: solid; 
border-width: 2px 2px 50px 2px; 
border-radius: 100%; 
position: relative; 
} 
#yin-yang:before { 
content: ""; 
position: absolute; 
top: 50%; 
left: 0; 
background: #eee; 
border: 18px solid red; 
border-radius: 100%; 
width: 12px; 
height: 12px; 
} 
#yin-yang:after { 
content: ""; 
position: absolute; 
top: 50%; 
left: 50%; 
background: red; 
border: 18px solid #eee; 
border-radius:100%; 
width: 12px; 
height: 12px; 
}

好了，就到这里了，一共28个，个人觉得后面几个比较犀利。这些代码的来源是css-tricks。由青藤屋博客整理，转载请保留原文链接：http://www.itivy.com/ivy/archive/2012/1/16/css-shape.html