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 ...

Animated Web page backgrounds can be eye-catching, and you can create them using GIF files. When you add text and other content to your business Web pages, you don't have to worry about adding ...

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 ...