1) Added custom CSS. Check now, please.
2) Don’t use Static block for simple drop-down https://prnt.sc/CH06rkOOoxAV Use it for the mega menu only. Check now.
3) Slider width depends on the width of the column where you placed that. So if you want to change the width of the slider then change the width of the column.
We would recommend you to use cache plugin to speed up the site. There are a lot of cache plugins, choose the one you like most of all: W3 Total cache, WPRocket, WP-Optimize – Cache, Clean, Compress, LiteSpeed Cache, WP Fastest Cache etc.
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