CSS

![image.png](https://p9-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/e231465a8f7b43d2a74d8159f3937574~tplv

![image.png](https://p6-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/5f1928ed38f94a54ade37a3a701fa761~tplv

uni-app动态绑定class和style uni-app动态绑定class和style uni-app动态绑定class和style