原文链接：http://caibaojian.com/css3-background-gradient.html.gradient{
    background: #000000; background: -moz-linear-gradient(top, #000000 0%, #ffffff 100%); background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#000000), color-stop(100%,#ffffff)); background: -webkit-linear-gradient(top, #000000 0%,#ffffff 100%); background: -o-linear-gradient(top, #000000 0%,#ffffff 100%); background: -ms-linear-gradient(top, #000000 0%,#ffffff 100%); background: linear-gradient(to bottom, #000000 0%,#ffffff 100%); filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#000000', endColorstr='#ffffff',GradientType=0 ); } :root .gradient{
   filter:none;}