如何通过CSS3 实现响应式Web设计_html/css_WEB-ITnose
如何通过CSS3 实现响应式Web设计:
分为三个步骤:(1)允许网页宽度自动调整。首先在页面头部中,我们需要加入这样一行: viewport是网页默认的宽度和高度,网页的宽度默认就等于自己屏幕宽度(width=device-width),并且原始缩放比例(initial-scale=1)为1.0,也就是网页初始大小占屏幕面积的100%。(2)流式布局。不使用绝对宽度布局和字体大小,也就是css中代码中,定义宽和高的时候不能使用px(width:px)只能使用百分比(width:%)或者(width:auto)定义高宽。定义字体大小也使用相对单位(em),不使用绝对单位(px)。(3)媒体查询(media query)@media only screen and (max-width:px)max-width就是当屏幕小于等于多少的时候执行而(min-widt)就是当屏幕大于等于多少的时候执行。

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