基于border实现的小圆角效果

HTML

<a href class="button">我是按钮</a>
					    

CSS

.button {
    display: inline-block;
    line-height: 36px;
    padding: 0 40px;
    color: #fff;
    background-color: #cd0000;
    position: relative;
}
.button:before,
.button:after {
    content: "";
    position: absolute;
    left: 0; right: 0;
    border-style: solid;
}
.button:before {
    top: -2px;
    border-width: 0 2px 2px;
    border-color: transparent transparent #cd0000;
}
.button:after {
    bottom: -2px;
    border-width: 2px 2px 0;
    border-color: #cc0000 transparent transparent;
}
					    

JS

//no