Does anyone know an online doc editor like Google Docs but one that lets you create sections within the doc and move them around? I write a lot of articles and

Does anyone know an online doc editor like Google Docs but one that lets you create sections within the doc and move them around? I write a lot of articles and I have to constantly rearrange sections to achieve a better flow. It's getting annoying to constantly copy and paste chunks of text to move them around.