madia query和响应式布局

media screen and (设备特性）
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style type="text/css">
        #container{
            text-align: center;
            margin: auto;
            width: 750px;
        }
        #container>div{
            border: 1px solid #aaf;
            text-align: left;
            box-sizing: border-box;
            border-radius: 12px 12px 0px 0px;
            padding: 5px;
        }
        div#left{
            width: 300px;
            height: 260px;
            float: left;
        }
        div#main{
            width: 450px;
            height: 260px;
            float: left;
            clear: right;
        }
        div#right{
            width: 750px;
            float: left;
        }
        @media screen and (min-width: 1000px){
            #container{
                text-align: center;
                margin: auto;
                width: 960px;
            }
            #container>div{
            border: 1px solid #aaf;
            box-sizing: border-box;
            border-radius: 12px 12px 0px 0px;
            padding: 5px;
            }
            div#left{
                width: 240px;
                height: 260px;
                float: left;
            }
            div#main{
                width: 460px;
                height: 260px;
                float: left;
                clear: none;
            }
            div#right{
                width: 260px;
                float: left;
                height: 260px;
            }
        }
        @media screen and (max-width: 480px){
            #container{
                text-align: center;
                margin: auto;
                width:450px;
            }
            #container>div{
            border: 1px solid #aaf;
            box-sizing: border-box;
            border-radius: 12px 12px 0px 0px;
            padding: 5px;
            }
            div#left{
                width: 450px;
                height: 150px;
                float: left;
            }
            div#main{
                width: 450px;
                height: 260px;
                float: left;
                clear: both;
            }
            div#right{
                width: 260px;
                float: left;
                height: 170px;
            }
        }
    </style>
</head>
<body>![在这里插入图片描述](https://img-blog.csdnimg.cn/20200203210333573.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1dZRzIwMjA=,size_16,color_FFFFFF,t_70)
    <div id="container">
    <div id="left">
    <h2>按实际到货发</h2>
    。。。大杀四方    
    </div>
    <div id="main">
    <h2>asfsa </h2>  
    ...asdsd  
    </div>
    <div id="right">
    <h2>阿斯蒂芬</h2>
    。。。阿达水电费
    </div>
    </div>
</body>
</html>
三种布局：
大于1000
在这里插入图片描述 480-1000
小于480
来源：CSDN
作者：WYG2020
链接：https://blog.csdn.net/WYG2020/article/details/104161821
标签
响应式布局