css3圆角边框制作方法_html/css_WEB-ITnose
经常看到别人的网站有个边框来修饰文字区域，类似圆角矩形把文字环绕起来，特别有感觉，于是就试着用图片边框来修饰，但是用图片过多会拉慢网页的加载速度，能不能使用css3来实现边框圆角效果呢？当然border-radius要在firefox或Safari 和 Chrome才能实现
W3C 很早就制订了实现了 CSS 圆角的 CSS3 属性：border-radius，Firefox 和 Safari 也通过私有属性实现了该功能：
1
Firefox 和 Safari 使用私有属性实现圆角效果;
这个表示边框内的底部图片颜色;
border: 1px solid #000;表示边框的宽度，实心的，颜色是黑色的；
border-top-left-radius: 55px 25px;表示左上角的边框圆角效果，通过英文就可以识别:top,left，修饰圆角的长度通过控制像素值来实现，55px表示横向的长度，25px表示纵向的长度；
同理，border-bottom-right-radius: 55px 25px;右下角的圆角效果只要修改top为bottom就可以了;
使用css3来实现边框圆角效果
其中 -moz-border-radius 是 Firefox 实现圆角的私有属性，而 -webkit-border-radius 是 webkit 内核浏览器（如 Safari 和 Chrome）实现圆角的私有属性，如果你只要指定某一个角是圆角的话，它们都分别定义了四个属性：
-moz-border-radius-topleft / -webkit-border-top-left-radius-moz-border-radius-topright / -webkit-border-top-right-radius-moz-border-radius-bottomleft / -webkit-border-bottom-left-radius-moz-border-radius-bottomright / -webkit-border-bottom-right-radius
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