Image quality is poor on published link only

[Sergey_Havenson]

Hello, thanks for reading

I have a CMS with photos and text,
Looks like this

but when I publish it looks very low quality

No custom code, and pictures are very high resolution (up to 3mb)
photo div has not W/H settings, set on Fill

Any suggestions?

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Here is my site Read-Only: [LINK][1]