Start up landing page

What is implemented:
Adaptive Worms;
the crossbrowsing;
The Pixel Perfect
The appearance of blocks;
Parallel effects on the scroll;
- Delayed download of images and maps;
Page Speed Insights – 94% and 100%;
Forms of feedback;
setting the map;
- Settings of events in Google Analytics and Yandex Metrics;
The Flexbox layout.