CSS 背景

一、常用属性：

background-color
background-image
background-repeat
background-position

background-color: cornflowerblue
 
background-image: url('1.jpg');
 
background-repeat: no-repeat;(repeat:平铺满)
 
background-position: right top（20px 20px）;

二、实例：

background:#ffffff url('1.png') no-repeat right top;