lovecoding
/
VIP22


			
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #div1{
            height: 50px;
            background: #00f;
        }
        ul{
            background: #0f0;
            list-style: none;
        }
        li{
            background: #f00;
        }

        /* body{
            margin:0;
        }
        ul{
            padding-left: 0;
        } */
        /* 通配符 选择所有标签*/
        *{
            margin:0;
            padding: 0;
        }

        #div3{
            width: 1200px;
            height:100px;
            background: palevioletred;
            /* margin-left:120px; */
            /* 固定宽度的块级元素 水平居中 上线 0   左右自适应 */
            margin:0 auto;
        }


    </style>
</head>
<body>
    <!-- <div id="div1"></div>
    <ul>
        <li>11</li>
        <li>22</li>
    </ul> -->
    <!-- 宽度1200 高100 左右居中  -->
    <div id="div3"></div>
</body>
</html>