Vertical center alignment of html text-yuanke

Vertical center alignment of html text-vertical center alignment of yuanke html text, the Code is as follows:

Row 1

Row 2

Row 3

Another span

Implementation principle:

1. First, set the height of the p element to the same value as the row height, so that the element in the row in the block is vertically centered.

2. Set the display of the span element and change the display to line-block to make it a block element in the row.

3. Set vertical-align of span to middle, center vertically, and set the Row Height to 1.2em to change the inherited Row Height.