``` 9. **Verification against constraints**: * *No markdown code block backticks*: Yes, I will output the raw HTML directly without ```html or ```. * *Starting with ``*: Yes. * *Image padding*: `padding: 0 16px;` on `.product-detail-image-group` ensures left/right padding is 16px. * *Image spacing*: `margin-bottom: 0` and `display: block` on `.product-detail-image-group img` ensures no vertical space between vertical images. * *Card border-radius*: `16px`, shadow: `0 4px 12px rgba(0,0,0,0.05)`, padding: `20px`. * *Titles*: font-size `20px`, bold, margin-bottom `16px` (close to 12px, let's use 12px as requested). * *Questions*: font-size `15px`, bold (font-weight: 600). * *Answers*: font-size `14px`, line-height `1.5`, color `#4b5563`, padded on left.