纯css聊天气泡框，挺好用的简单几句代码

        border-image-source: url("气泡框地址");  
        border-style: solid;  
        border-image-slice: 49.9% fill;   
        border-width: 20px;   
        background-color: transparent;  
        max-width: 100px;  
        color: #000;  
        font-size: 14px;  
        font-weight: 600;

        很好的示例 ： http://www.htmleaf.com/ziliaoku/qianduanjiaocheng/border-image-slice.html#google_vignette