ant-design/docs/spec/layout/index.en-US.md

template	category	order	cols	title
component	Design Fundamental	4	1	Layout

Layout and Navigation is the backbone of productions, it is one of the most important design pattern of a page, and it is also a base when you create a page, it will establish a interactive and visual style for a production.

The Layout and Navigation design specification for Ant Design are as follows:

The specification of size

The first level of the navigation is placed near by a logo inclined left, and the secondary menu is placed inclined right.

• Top Navigation (almost systems): the height of the first level navigation 64px, the second level of navigation 48px。
• Top Navigation(contents page): the height of the first level navigation 80px,the second level of navigation 56px。
• Calculation formula of a top navigation:48+8n.
• Calculation formula a aside navigation:200+8n.

The principle of interaction

• The first level navigation and the last level navigation should be distincted by visualization;
• The current item should have the highest priority of visualization;
• When the current navigation item is collapsed, the stlye of the current navigation item will be applied to the parent level of it;
• The left side navigation bar support for both the according and the expanding style, you can choose the one of it case by case.

The principle of visualization

Style of a navigation should conform to the level of it.

• Emphasis by colorblock

  When background color is a deep color, you can use this pattern for the parent level navigation item of current page.

• The highlight match stick

  When background color is a light color, you can use this pattern for the current page navigation item, we recommed to use it for the last item of the navigation path.

• Hightlighted font

  From the visualization aspect, hightlighted font is stronger than colorblock, this pattern is often used for the parent level of the current item.

• Enlarge the size of the font

  12px、14px is a standard font size of navigations，14 is used for the first and the second level of the navigation. You can choose a approprigate font size in terms of the level of your navigation.

In almost middle-back systems, Ant Design uses two general layouts of top navigation and aside navition, we collect some basic layouts of middle-back systems are designed by Ant Design as follows: