manishkco/studySync ? reverse-engineered prompt

Build me a clean, modern landing page for an ed tech platform called StudySync using just HTML and CSS.

I want it to feel polished and responsive on desktop and mobile, with a simple top navigation that turns into a hamburger menu on smaller screens. Include a hero section with a strong headline, short supporting text, and two clear call to action buttons. Add a section for trusted companies or partner logos, a set of feature cards with simple icons, a testimonials area, a newsletter signup form, and a well organized footer.

Please make the layout look professional, with good spacing, readable typography, and a nice color palette that feels friendly and trustworthy. Keep everything centered around a modern marketing page style, and make sure it works well on different screen sizes. If you need to, look up current best practices for responsive HTML and CSS before finishing it.