IE7/IE8浏览器纯CSS实现圆角效果

CSS代码：

.box {
    width: 150px; height: 150px;
    line-height: 150px;
    position: relative;
    overflow: hidden;
}
.radius {
    position: absolute;
    width: 100%; height: 100%;
    border-radius: 50%;
    border: 149px dotted;
    /* IE7,IE8圆尺寸要小1像素同时有1像素偏移 */
    margin: 0 0 1px 1px;
    border-width: 0vw;
    margin: 0vw;
    color: #cd0000;
    background-color: currentColor;
}
.text {
    position: relative;
    color: #fff;
    text-align: center;
    font-size: 24px;
}

HTML代码：

<div class="box">
    <i class="radius"></i>
    <p class="text">圆形</p>
</div>