CSS背景色渐变
* {
background: -moz-linear-gradient(left, orange 0%, red 100%);
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, orange), color-stop(100%, red));
background: -webkit-linear-gradient(left, orange 0%, red 100%);
background: -o-linear-gradient(left, orange 0%, red 100%);
background: -ms-linear-gradient(left, orange 0%, red 100%);
background: linear-gradient(to right, orange 0%, red 100%);
}