持续学习-拥抱流式布局

继续学习-拥抱流式布局

今天，继续学习《响应式Web程序设计-HTML5和CSS3实战》。根据昨天的代码进行了修改。边学边改，加入了媒体。

基本步骤就是：

1.将固定的像素元素宽度改为百分比。公式：目标元素宽度 / 上下文元素宽度 = 百分比宽度。

2.将固定的文字像素大小改成等量相对尺寸。使用em。公式：目标元素尺寸 / 上下文元素尺寸 = 百分比尺寸。

3.图像加入width、max-width，使图像平滑缩放。

4.加入媒体查询，不同视口对应不同的字体，布局。

如图，分别是480和768的视口：

480

768

这里就贴css代码了。style.css

body{
	background-image:url(image/bg4.png);
	background-repeat:repeat;
}
img,object,video,embed{
	max-width:100%;
}
#wrapper{
	margin-right:auto;
	margin-left:auto;
	width:93.75%;
}

#header{
	margin-right:1.06382978%;
	margin-left:1.06382978%;
	margin-bottom:40px;
	width:97.91%;
	height:200px;
	background-image:url(image/buntingFW.png);
	background-repeat:repeat-x;
	border-bottom:dashed 1px red;
}

#headline{
	height:140px;
	font-size:3em;
	font-family:Arial;
}
#headline span{
	position:relative;
	top:70px;
	left:1.06382978%;
}
#special_hint{
	color:#aeaeae;
}
#navigation{
	background-image:url(image/atwiNavBg.png);
	background-repeat:repeat-x;
	height:30px;
}
#navigation ul{
	margin:0px;
	padding:0px;
}
#navigation ul li{
	display:inline-block;
	margin-left:1.06382978%;
	margin-right:1.06382978%;
}
#navigation ul li a{
	text-decoration:none;
	font-size:1.5625em;
	font-family:Arial;
	font-weight:bold;
	color:black;
}

#main{
	overflow:auto;
}

#siderbar{
	padding-left:1.06382978%;
	padding-right:1.06382978%;
	border-right:solid 3px #eaeaea;
	width:19.14%;
	float:left;
}

#siderbar span{
	font-size:1.25em;
	font-family:Arial;
	font-weight:bold;
	color:black;
	clear:both;
}

#siderbar img{
	float:left;
	padding:5.5555555556% 2.777777778%;
	max-width:43%;
}

#content{
	margin-right:1.06382978%;
	margin-left:1.06382978%;
	float:right;
	width:74.46%;
	font-family:Arial;
}
#content img{
	float:left;
	width:28.9389%;
	max-width:202px;
}
#text{
	float:right;
	width:68.57%;
}
#text h1{
	font-size:4.375em;
	margin:0px;
	padding:0px;
}
#text h2{
	margin:0px;
	padding:0px;
	font-size:2.5em;
	color:#7F7F7F;
}
#text span{
	color:#7F7F7F;
	font-size:1.125em;
	line-height:30px;
	height:30px;
}
#footer{
	display:block;
	margin-right:1.06382978%;
	margin-left:1.06382978%;
	margin-top:40px;
	border-top:dashed 1px red;
	clear:both;
	width:97.91%px;
	height:150px;
}
#notation{
	height:80px;
	text-align:center;
	padding-top:20px;
	font-size:0.9375em;
	color:brown;
}
#footimg{
	background-image:url(image/buntingFWinvert.png);
	background-repeat:repeat-x;
	height:40px;
}



@media screen and (min-width:975px) and (max-width:1080px){
	#navigation ul li a {font-size:1.5625em}
}
@media screen and (min-width:789px) and (max-width:974px){
	#navigation ul li a {font-size:1.2625em}
}
@media screen and (min-width:721px) and (max-width:788px){
	#navigation ul li a {font-size:1.1em}
	#text h1{font-size:3.375em;}
	#text h2{font-size:1.9em;}
}
@media screen and (min-width:541px) and (max-width:720px){
	#headline{font-size:1.8em}
	#navigation ul li a {font-size:0.8em}
	#siderbar span{font-size:0.9em;}
	#text h1{font-size:2.575em;}
	#text h2{font-size:1.12em;}
	#text span{font-size:0.9em;line-height:15px;}
	#text a{font-size:0.8em;}
	#notation{font-size:0.5em;}
}
@media screen and (max-width:540px){
	#headline{font-size:1.8em}
	#navigation ul li a {font-size:0.8em}
	#siderbar{width:94%;}
	#siderbar span{font-size:1.8em;}
	#siderbar img{max-width:100%;}
	#text h1{font-size:2.575em;}
	#text h2{font-size:1.12em;}
	#text span{font-size:0.9em;line-height:15px;}
	#text a{font-size:0.8em;}
	#notation{font-size:0.5em;}
	#siderbar{clear:both;float:none;border-right:none;}
	#content{clear:both;float:none;}
}