Responsive design (design adaptatif)
Responsive design adapts a site to every screen size from a single base. It's judged at the design system level: what the marketing team can publish without breaking the layout on mobile, tablet or desktop.
Definition
Responsive design is the practice of designing a site so it displays correctly on every screen size, mobile, tablet, desktop, from a single codebase or a single design built in a tool like Webflow. The real test isn't "does it fit on mobile", but what the marketing team can publish afterwards, a new block, a new page, without breaking the layout on any one format.
How it works
A responsive site is built with breakpoints, the screen widths where the layout changes behavior: columns stack, the menu turns into a mobile menu, images resize. These rules live in the site's design system: if every component (button, card, section) has its responsive behavior defined once, a new page built from those components stays responsive with no extra work. Google, for its part, has applied mobile-first indexing by default to all new sites since July 2019: it's the mobile version of a page, not its desktop version, that Google crawls and ranks first.
Why it matters for your site
A site that breaks on mobile loses visitors before they even read the content, and a site the marketing team is afraid to touch for fear of breaking the layout amounts to paying an agency for every update. Responsive design built properly at the design system level solves both problems at once: readability on every screen, and publishing autonomy.
The We-R perspective
We never judge responsiveness on a single page, but on the design system behind it: does a button, once changed, behave correctly on the ten pages that use it, across three screen sizes. That upfront work, invisible once the site ships, is what keeps a redesign from becoming necessary the first time someone publishes content that doesn't quite match the original template.
Learn more
See also: Design system, Wireframe, Core Web Vitals. And to put it into practice: Nouveautés Designer Webflow : les 7 annonces de la Conf 2026 or Webflow sites built on a complete design system by We-R.
Sources: Google, default mobile-first indexing since July 2019 (Search Engine Land). Last updated: November 2026.
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