Responsive Landing Page Development for Marketing Offer by Marcus CastroResponsive Landing Page Development for Marketing Offer by Marcus Castro

Responsive Landing Page Development for Marketing Offer

Marcus Castro

Marcus Castro

Responsive Landing Page for a Website Injection Offer

I designed and developed a landing page for a marketing agency to promote a specific service offer focused on website injection.
The project was delivered in three days and involved the full structure, layout, visual direction and front-end implementation of the page.
The final landing page was built with a responsive design, aligned with the agency’s brand identity and connected to HubSpot for publication and lead capture.

Context and Challenge

The agency needed a dedicated landing page to present one of its commercial offers in a clearer and more conversion-oriented way.
The challenge was to turn the service into a focused digital asset that could explain the offer, communicate value quickly and guide visitors toward taking action.
The page also needed to be developed fast, without losing visual quality, responsiveness or brand consistency.

What I Delivered

I was responsible for the full landing page structure, design and implementation.
The work included defining the page sections, organizing the commercial narrative, creating the layout and developing the HTML structure with support from Claude Code.
After building the page, I inserted the required HubSpot scripts directly into the HTML and published the final version inside HubSpot, making the landing page ready for campaign use and lead capture.
The delivery included:
Landing page structure and section planning.
Responsive layout design.
HTML implementation with Claude Code.
Brand-aligned visual direction.
HubSpot script integration.
Publication inside HubSpot.
Final adjustments for mobile and desktop responsiveness.

Design and Development Approach

The design direction focused on clarity, responsiveness and visual consistency with the agency’s identity.
The page was structured to present the offer in a direct way, with a clear hierarchy between headline, value proposition, benefits, supporting information and conversion points.
On the development side, the goal was to create a clean and flexible HTML structure that could work well inside HubSpot. Claude Code supported the build process, while I directed the structure, reviewed the output, adjusted the layout and handled the HubSpot implementation.
The result was a fast, responsive and campaign-ready landing page, built to support the agency’s commercial strategy.

Why This Case Matters

This project shows my ability to move from brief to execution quickly, combining design, copy structure, front-end implementation and marketing platform setup.
More than creating a static page, the work connected commercial strategy, responsive design and HubSpot implementation into a functional landing page ready to be used in a real campaign.
The project was completed in three days, proving that speed and quality can work together when the process is clear and the execution is focused.
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Posted Jun 26, 2026

Designed and developed a responsive landing page for a marketing offer.