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