Business Portfolio HTML Creation

I’m building out the portfolio area of my company’s site and need clean, well-structured HTML that presents our case studies professionally. The page (or small set of pages) has to be:

• Fully hand-coded in semantic HTML5 with accompanying CSS3.
• Responsive so it looks polished on desktop, tablet, and mobile.
• Easy for me to drop new case-study blocks in the future without touching multiple sections.

Each case study will need space for a hero image, quick stats, a short narrative, and an optional external link. I’ll supply copy, images, and brand colors; you give me back the finished markup, a single CSS file (or a Bootstrap-based approach if you prefer), and brief comments in the code so I can tweak later.

Before sign-off I’ll test in Chrome, Firefox, Safari, and Edge—please make sure nothing breaks there. Once everything passes, send over the zipped source and we’re done.