css伪类运用_html/css_WEB-ITnose

CSS 输出图形

.square{width:100px;height:100px;background-color:#FFF;position:relative;border:2px #000000 solid;}
.square:before{
content:"";
width:0px;
height:0px;
display:block;
position:absolute;
z-index:2;
top:25%;
right:-28px;
border:15px solid #FFF;
border-color:transparent transparent transparent #FFF;
}
.square:after{content:"";
width:0px;
height:0px;
display:block;
position:absolute;
z-index:1;
top:25%;
right:-30px;
border:15px solid #FFF;
border-color:transparent transparent transparent #000;
}
.a{width:0;height:0;border:40px solid; border-color:transparent transparent transparent #F00;}

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