Custom modification of the origin of the small program swiper component

默认原点样式
.banner .wx-swiper-dot{background: #ddd;width: 10rpx;height: 10rpx;border-radius: 50%;}
选中原点样式
.banner .wx-swiper-dot-active{width: 30rpx;height: 10rpx;border-radius: 10rpx;background: #ff2d00;}