6.使用定位，制作弹出框界面 / 开普饭

使用定位，制作弹出框界面：
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <!-- reset.css文件内容参考：https://www.cnblogs.com/lanshanxiao/p/12663192.html -->
    <link rel="stylesheet" href="./reset.css">
    <style>
        img{
            width:500px;
            height:500px;
        }

        /* 遮罩层，半透明 */
        .container .main{
            position:fixed;
            width:100%;
            height:100%;
            top:0;
            left:0;
            background-color: rgba(0,0,0,.5);
        }

        /* 设置弹出层样式 */
        .container .main .login{
            position:absolute;
            left:0;
            right:0;
            top:0;
            bottom:0;
            margin:auto;
            width:500px;
            height:500px;
            background-color: #fff;
            border-radius: 5px;
            padding:20px;
        }

        /* 设置关闭样式 */
        .container .main .login .close{
            width:20px;
            height:20px;
            box-sizing: border-box;
            border-radius: 50%;
            background-color: rgba(255,255,255,.5);
            color:#999;
            text-align: center;
            line-height: 20px;
            font-size:18px;
            position:absolute;
            top:0;
            right:0;
        }
    </style>
</head>

<body>
    <div class="container">
        <img src="http://i-1-33app.qqxzb-img.com/2019/11/15/6fd81ae2-4e85-43da-b5bd-e810cd54c82c.jpg?imageView2/2/q/85" alt="">

        <div class="main">
            <div class="login">
                Lorem ipsum dolor sit amet consectetur adipisicing elit. Debitis consectetur laboriosam maiores sequi deleniti nihil cumque repellendus ea, harum a, vero voluptatum dicta dolorem blanditiis, accusamus saepe fugit cum vel?
                <div class="close">
                    x
                </div>
            </div>
        </div>
    </div>
</body>

</html>
index.html
效果展示：
6.使用定位，制作弹出框界面

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