CSS3仿Twitter网站的信息提示框，使用了css3的渐变gradient，盒子阴影box-shadow，css3的选择器等。编写这个提示框的时候有个人觉得有两个亮点，一个是使用了before配合gradient制作了内凹圆角效果，类似于chrome浏览器上的tabs效果，看似简单，实际操作起来有点难度哦；另一个亮点就是使用gradient制作了渐变的线条，有意研究的你可下载代码查看。-Message box CSS3 imitation Twitter website, using the gradient gradient css3, the box shadow box-shadow, css3 selectors and so on. Write the message box when a man think there are two bright spots, one is used before making a concave fillet with gradient effect, similar to the effect of chrome tabs on your browser, seemingly simple, in practice it a bit more difficult, oh　another highlight is the use of gradient produced a gradient lines, intends to study you can download the code view.