[background](CSS3背景/background.md) [background-color](CSS3背景/background-color.md) [background-image](CSS背景/background-image.md) [background-repeat](CSS3背景/background-repeat.md) [background-attachment](CSS3背景/background-attachment.md) [background-position](CSS3背景/background-position.md) [background-origin](CSS3背景/background-origin.md) [background-clip](CSS3背景/background-clip.md) [background-size](CSS3背景/background-size.md)