https://segmentfault.com/a/1190000002773955
渐变背景:
background:-moz-linear-gradient(top, #FFFFFF, #f8f8f8); background:-webkit-linear-gradient(top, #FFFFFF, #f8f8f8); background:-ms-linear-gradient(top, #FFFFFF, #f8f8f8); background:linear-gradient(top, #FFFFFF, #f8f8f8); -ms-filter:"progid:DXImageTransform.Microsoft.gradient (GradientType=0, startColorstr=#FFFFFF, endColorstr=#f8f8f8)"; +background:#f9f9f9;