line-height 设置为 1
https://stackoverflow.com/questions/1000398/what-is-line-height1
If no unit is supplied e.g. "line-height: 1.5" the distance between the lines is set as this number multiplied with the current font size.
1.5 x font-size
https://stackoverflow.com/questions/1000398/what-is-line-height1
If no unit is supplied e.g. "line-height: 1.5" the distance between the lines is set as this number multiplied with the current font size.
1.5 x font-size
