How can I set line spacing with CSS, like we can set it in MS Word?
Try the line-height property.
For example, 12px font-size and 4px distant from the bottom and upper lines:
line-height: 20px; /* 4px +12px + 4px */
Or with em
units
line-height: 1.7em; /* 1em = 12px in this case. 20/12 == 1.666666 */