pt点(Points)绝对长度单位。72 分之一英寸。1pt = 1/12 * 1pc = 1/72 * 1in。浏览器支持浏览器都支持pt说明:点(Points)绝对长度单位。1in = 2.54cm = 25.4 mm = 101.6Q = 72pt = 6pc = 96px实例div{font-size:10pt;} p{height:100pt;}