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bootstrap学习 屏幕和设备的宽度保持一致，初始缩放为1:1 [if lt IE 9]> <script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script> <script src="https://oss.maxcdn.com/libs/respond.js/1.3.0/respond.min.js"></script> <![endif] .top{ width border margin .pull-left{ width height background-color .pull-right{ width height background-color左边哦右边啦

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bootstrap学习 屏幕和设备的宽度保持一致，初始缩放为1:1 [if lt IE 9]> <script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script> <script src="https://oss.maxcdn.com/libs/respond.js/1.3.0/respond.min.js"></script> <![endif]邮箱密码手机号唱歌跳舞写代码分享

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