CSS3 background－origin 属性指定在背景图像定位在哪里． 这个属性有三个不同的值： border－box ：背景图像从边框的左上角开始。 padding－box ：（默认）背景图像从左上角的填充边缘。 ＜！DOCTYPE html＞＜html lang＝＂en＂＞＜head＞ ＜meta charset＝＂UTF－8＂＞ ＜title ...

Major browsers support CSS3 gradients (including Internet Explorer 10), but with different rendering engines, it's still good to have fallbacks. Designing the presentation layer of an HTML5 ...