Biology Exhibition QR Website

I am organising an interactive biology exhibition and need a responsive website that visitors reach by scanning QR codes placed next to each specimen. Each page should instantly display a modern-looking layout with a text description, high-quality images, and, where available, a rotatable 3-D model of the featured animal or plant.

The overall aesthetic must stay modern and clean to match the exhibition branding; white space, crisp typography, and subtle colour accents feel right. I have no fixed requirement for a particular CMS, so you are free to propose WordPress, a lightweight headless setup, or a custom build—whichever achieves fast loading times and is easy for me to update later.

Core tasks I need you to handle:
• Build the site architecture and template for specimen pages.
• Integrate or recommend a simple admin workflow so I can add new species myself.
• Generate scannable QR codes that link directly to each page.
• Optimise images and 3-D files so they load smoothly on mobile connections.
• Ensure the site is mobile-first and works offline in case of patchy venue Wi-Fi.

Please outline your suggested tech stack, any relevant past work, and the approximate timeframe you’d need to deliver a fully tested, exhibition-ready site.