三角箭头css的写法

在class名为acRe-content的html结构下的css

.acRe-content::before{ position:absolute;top:-9px;left:84px;content:"";display:inline-block; border-bottom:9px solid #448bc5;border-left:9px solid transparent;border-right:9px solid transparent;}
.acRe-content::after{ position:absolute;top:-8px;left:84px;content:"";display:inline-block; border-bottom:9px solid #e5f1fa;border-left:9px solid transparent;border-right:9px solid transparent;}