边框渐变：
1 border-image: -webkit-linear-gradient( red , blue) 30 30; 2 border-image: -moz-linear-gradient( red, blue) 30 30; 3 border-image: linear-gradient( red , blue) 30 30;
文字渐变：（只支持-webkit-）
1 background-image: -webkit-gradient(linear, 0 0, 0 80%, from(nth($color7, 3)), to(nth($color7, 4))); 2 -webkit-background-clip: text; 3 -webkit-text-fill-color: transparent;
背景渐变：
1 filter: alpha(opacity=100 finishopacity=50 style=1 startx=0,starty=0,finishx=0,finishy=150) progid:DXImageTransform.Microsoft.gradient(startcolorstr=red,endcolorstr=blue,gradientType=0); 2 -ms-filter: alpha(opacity=100 finishopacity=50 style=1 startx=0,starty=0,finishx=0,finishy=150) progid:DXImageTransform.Microsoft.gradient(startcolorstr=red,endcolorstr=blue,gradientType=0); 3 background: red; /* 一些不支持背景渐变的浏览器 */ 4 background: -moz-linear-gradient(top, red, blue); 5 background: -webkit-gradient(linear, 0 0, 0 bottom, from(red), to(blue));
