background-image属性和线性渐变函数linear-gradient()实现。从上到下的红色到蓝色的渐变可以这样写：，``css，.example {， background-image: linear-gradient(to bottom, red, blue);，}，``background-image属性和线性渐变函数linear-gradient()实现。从上到下的红色到蓝色的渐变可以这样写：，``css，.example {， background-image: linear-gradient(to bottom, red, blue);，}，``Powered By Z-BlogPHP 1.7.3