.main { float: left; width: 100%; height: 100%; /* background-image: linear-gradient(#ff0000, #ffffff); */ background-color: #f9fafc; } .main .one { position: fixed; z-index: 9999; width: 100%; height: 80rpx; line-height: 80rpx; background-color: #409eff; color: #ffffff; text-align: center; } .main .two { position: absolute; top: 80rpx; width: 100%; margin: 20rpx 0 0 0; }