定位
| css | style | 备注 |
|---|---|---|
| dr | position:relative; | |
| da | position:absolute; | |
| df | position:fixed; | |
| dt-10 | top:10rpx; | |
| dt-20rpx | top:20rpx; | |
| dt-30% | top:30%; | |
| db-10 | bottom:10rpx; | |
| db-20rpx | bottom:20rpx; | |
| db-30% | bottom:30%; | |
| dl-10 | left:10rpx; | |
| dl-20rpx | left:20rpx; | |
| dl-30% | left:30%; | |
| dr-10 | right:10rpx; | |
| dr-20rpx | right:20rpx; | |
| dr-30% | right:30%; | |
| dlr-10 dtb-10 dlrt-10 | left:10rpx;right:10rpx; top:10rpx;bottom:10rpx; left:10rpx;right:10rpx;top:10rpx; | lrtb方向自由组合 |
| di-10 | top:10rpx; bottom:10rpx; left:10rpx; right:10rpx; |
