Starter Kit for NodeJs CMS Nodee.io is based on the Bootstrap, but you can use any kind of CSS framework or your custom CSS in Nodee CMS (e.g Miligram, Bulma, PureCSS, BlazeCSS).
Data and its view are separated. Redesign of your website won't be a problem. You don't need do any data transfer, change view only. Next advantage is, that CMS has API, you can use data from CMS like you want, for example to view data in mobile app.
Starter Kit has basic Widgets, that you will use on the websites. But you can quick add more complex widgets. Create new website is easy and fast as well as add content. Every Widget can be used in other website, just copy& paste its code and other settings. Do following steps to create a new website:
See documentation to find out how to install and use Nodee CMS build in NodeJS.