On third-level pages, the most pronounced work of the grid and the algorithm, which was mentioned above.
Recall that the site uses a six-column grid everywhere.
In the layout of all blocks with photos of products on all pages of the site uses the same algorithm.Its essence is that each of the 6 columns is a block of width, but there are exceptions, in some places block is skipped, and in some places block takes 2 columns.
1 rule of the algorithm - there are always 2 blocks in a row and after them 1 block is skipped.
2 rule of the algorithm - there are 3 block sizes, medium, small and large.
3 rule of the algorithm - with respect to the size of blocks, there are 2 schemes of their order, which alternate in a circle. The first scheme: medium block, small block, skip block. The second scheme: big block, small block, skip block.
These 3 rules make up the entire algorithm.
This algorithm helps to create the necessary rhythm of the blocks with photos of products, in which you can slowly and individually show each thing.
There is another very important point, which solves the algorithm. Rhythm, which he creates, helps to combat homogeneity (homogeneity), which leads to "blinding effect". Homogeneity, you can reduce with the rhythm, which will not be monotonous, but it also helps to fight it asymmetric composition.
Thus, despite the fact that the product categories pages are quite large in height, it is compensated by reducing the homogeneity and asymmetric composition. As a result, came out to show 24 products, on one page, with an individual approach in a measured rhythm, and with all this, these pages read quite comfortably.
On the third and fourth level pages, the behavior of the main navigation changes slightly. All menu items except the active item, go under the active menu item and are no longer visible.
This is done in order to free up space that is needed on the pages of this level, because otherwise the menu takes up a lot of useful space, which is so necessary on these pages.
Also next to the active menu item, there is an additional navigation inscription that shows which product group the user is in.
And also in the menu is added a navigation arrow that leads back to the page with all the groups of products in the selected category.