窗口上的字体重量比mac厚？

Question

我不知道我的代码有什么问题？我在Windows上的字体重量会发生变化，但在我的android和mac上保持不变。我还尝试更改字体，因为我可能认为Windows没有安装helvetica字体。

＆＃13;

＆＃13;

@font-face {
	font-family: Helvetica;
	 src: url(Helvetica.dfont);
}
a,p{
	text-decoration: none;
	font-weight: normal;
	font-family: Helvetica;
	font-size: 12px;
}
li{
	list-style-type: georgian;
	font-family: Helvetica;
	font-weight: lighter;
	padding-top: 5px;
}
h3{
	font-weight: lighter;
	font-family: Helvetica;
	margin: 0px;
}
hr{
	height: 2px;
	background-color: lightgray;
	border: 0px;
}
/*MOBILE SUPPORT*/
@media screen and (max-width: 414px) and (min-width: 337px) {
	#headnav{
		text-align: center;
		margin-right: 40px;
	}
	#updatelog{
		margin-top: 10px;
	}

	img.footer_pi{
		width: 90%;
		height: 90%;
	}
}

/*END OF MOBILE SUPPORT*/
/*wrappers*/
.wrapper{
	margin: 0 auto;
	padding: 10px;
	display: block;
	max-width: 750px;
}

footer.wrapper{
	overflow: hidden;
}
/*end of wrappers*/

/*homepage*/
#updatelog{
	margin-top: 10px;
	margin-left: 5px;
}
#robotics_notes{
	max-width: 100%;
	width: auto;
}

article#home_article > img{
	float: left;
}

article#home_article > p{
	padding-top:10px;
	clear: both;
}
article#home_article > aside{
	display: inline-block;
}

#homepage_header{
	font-family: Helvetica;
	font-weight: 300;
}	
#selected{
	background-color: #65448C;
}

div>h1{
	margin: 0 auto;
	text-align: center;
}

li > a{
	color: #ED1148;
	padding: 8px;
}
ul#headnav > li{
	list-style-type: none;
	display: inline-block;
}
li > a:hover{
	background-color: #ED1148;
}
li:hover a {
	color: white;
}
/*end of homepage*/
/*login*/
#middle{
	background-color: #E6CCCC;
	padding-top: 30px;
	width: 25%;
	min-width: 249px;
}
.login{
 	text-align: center;
}

button.login{
	font-family: Helvetica;
	margin-top: 10px;
	margin-bottom: 7px;
}
h2.login{
	color: #6A1B1B;
	display:block;
	padding: 0px;
	margin-top: 0px;
}
/*end of login*/
/*footer*/
	a.footer_pi{
		width: auto;
		max-width: 100%;
		visibility: visible; 
		float: right;
	}
	img.footer_pi{
		opacity: 0.65;
		transition: opacity .5s ease-in;
	}
	img:hover{
		opacity: 1;
	}
/*end of footer*/

＆＃13;

＆＃13;

＆＃13; http://intimite.biz.tm/