How to center menu css menu navigation and align internal left and right

Nav is centered, and margin:0 auto is added to the corresponding layer;

1 rows and n columns can be centered by setting li as the inline block mode: display: inline-block;

& ltstyle & gt

. Navigation? {

Margin: 0? Automatic;

Width:100%;

Border: 1px? Solid? # ccc

Text alignment: centered;

}

ul？ Li?

List style: None;

Left margin: 20px

Display: embedded-block;

}

& lt/style & gt；

& ltdiv？ class="nav " >

& ltul & gt

& lt Li> This part is left aligned 1

& lt Li> This part is left-aligned 2.

& lt Lee> This part is left-aligned 3.

& lt Li> This part is left-aligned 4.

& lt/ul & gt；

& lt/div & gt；