How to Use CSS3 to implement responsive Web design and css3 to respond to web Design

How to Use CSS3 to implement responsive Web design and css3 to respond to web Design

How to implement responsive Web design through CSS3:

There are three steps: (1) Allow Automatic Webpage Width Adjustment. First, add the following line to the page header: <meta name = "viewport" content = "width = device-width, initial-scale = 1 "/> viewport is the default width and height of the webpage. The default width of the webpage is equal to the screen width (width = device-width ), in addition, the original scaling ratio (initial-scale = 1) is 1.0, that is, the initial page size accounts for 100% of the screen area. (2) stream layout. The absolute width layout and font size are not used, that is, in the Code of css, px (width: px) cannot be used when the width and height are defined. Only the percentage (width: %) or (width: auto) defines the height and width. The relative unit (em) is used to define the font size, and no absolute unit (px) is used ). (3) media query @ media only screen and (max-width: px) max-width is executed when the screen is smaller than or equal to the number (min-widt) it is executed when the screen is greater than or equal.