Audit a product page for the specific reason it's leaking buyers, not a generic best-practices checklist

Audit one product detail page for conversion issues. The output must diagnose the most likely specific cause of underperformance given the actual funnel numbers below — not a generic 'add trust badges, add urgency, improve photos' checklist that would apply to any PDP.

PRODUCT PAGE CONTENT
Title, 4 product photos (no size-comparison shot), price shown without mention of shipping cost until checkout, no size guide link, 12 reviews averaging 4.2 stars.

FUNNEL DATA
View-to-add-to-cart rate is 8.5% (roughly in line with category average), but add-to-cart-to-purchase is only 19% versus a 34% site average.

WHAT'S ALREADY BEEN TRIED
Added a free-shipping banner site-wide two months ago; add-to-cart-to-purchase rate didn't move.

TRAFFIC SOURCE
70% from a paid Instagram campaign showing the product on a model, cold audience, first-time visitors.

STEP 1 — LOCATE THE ACTUAL DROP-OFF
Using the funnel data, identify exactly where in the page (or the flow) the biggest relative drop happens — view-to-add-to-cart, or add-to-cart-to-purchase — since the fix for one is usually different from the fix for the other, and a generic audit that addresses both equally usually fixes neither well.

STEP 2 — DIAGNOSE, DON'T JUST LIST SYMPTOMS
Given where the drop-off is and the actual page content, name the one or two most probable specific causes — reference actual content on the page (a specific missing spec, an unclear price break, a shipping cost surprise) rather than generic categories like "trust" or "clarity." Cross-check against what's already been tried — do not recommend something already attempted unless you have a specific reason the prior attempt likely failed and a different approach would work.

STEP 3 — TRAFFIC-SOURCE CONTEXT
Consider whether the traffic source changes the diagnosis — a page converting poorly from paid social cold traffic often has a different root cause (unmet expectation set by the ad) than the same page converting poorly from returning-customer email traffic.

STEP 4 — RECOMMENDATION
Give exactly the top 2 fixes to test first, each with the specific change and the specific reason it addresses the diagnosed cause — not a long list of every possible PDP improvement.

WHAT NOT TO DO
Do not include generic PDP best practices ("add more reviews," "use high-quality images," "add scarcity messaging") unless the funnel data and page content actually point to that specific gap.

OUTPUT FORMAT
Four labeled steps as specified, ending with the top 2 prioritized fixes.