Mobile Optimization & Form Fixes

I need my WordPress staging site (https://expoinsbrks.com/staging/) tuned so it finally feels smooth on a phone. The single most important target is a rock-solid responsive layout—every section, slider and button must scale and behave correctly on common devices.

While you are in the codebase, please address the following:

• Swap the current low-quality placeholders for sharper, lightweight images. Balance clarity with size so load times stay lean.
• Diagnose and repair the contact form’s functionality; leads sometimes vanish or never send. I want dependable delivery and clear success/error states.
• Improve overall page-load performance through smart CSS refactoring, minification, caching, and any other proven tactics you recommend.
• Provide practical security hardening suggestions I can action right away (plugins, settings or server tweaks).

Deliverables are straightforward: a fully responsive site, a flawlessly working form, measurably faster pages, cleaned-up CSS, and a brief report of the security steps you took or propose.

Please include a detailed project proposal outlining your plan, tools or plugins you intend to use, and an estimated timeline. Links to previous WordPress optimization work are welcome but optional; the proposal itself is essential.