CSS3中如何实现渐变效果

要得上面的线性渐变效果，我们这样去定义CSS3样式：background-image:-moz-linear-gradient(top,#8fa1ff, #3757fa); /* Firefox */background-image:-webkit-gradient(linear, left top, left bottom, color-stop(0,#ff4f02), color-stop(1, #8f2c00)); /* Saf4+, Chrome */filter