Unexpected types of grids
Some websites require a more personal approach, and that's when you can break the rules of the grid and create something more adventurous.
For example, you may use a golden rectangle as a proportion for elements. Larger elements will be for images and smaller ones for texts. As long as there's a connection to the golden rectangle, pages will appear harmonious.
You may use a custom grid system on a 45-degree angle and arrange elements wherever you want as long as you stay within this established structure.
Usually, designers experiment with grids on promo or landing pages, breaking a sweat to present a portfolio or specific product in a favorable light.