lovecoding
/
W260426


			
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							<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* css reset */
        * {
            margin: 0;
            padding: 0;
        }


        .fullscreen-container {
            /* height: 100vh;
            width: 100vw; */
            background-color: #f0f4c3;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
        }

        .bubble-container {
            width: 500px;
            height: 600px;
            background-color: #fff;
            z-index: 1000;
            position: fixed;
            top: 50%;
            left: 50%;
            margin-top: -300px;
            margin-left: -250px;
            padding: 20px;
            box-sizing: border-box;
        }

        .bottom-info {
            /* 如果块元素定位后fixed 和 absolute宽度会变成内容的宽*/
            position: fixed;
            bottom: 0;
            left: 0;
            height: 50px;
            width: 100%;
            text-align: center;
            line-height: 50px;
            color: #b28704;
            background-color: #fffde7;
        }

        .bubble-container .text {
            text-align: center;
        }

        .bubble-container .text h1 {
            color: #689f38;
            margin: 20px 0;
        }

        .bubble-container .text .info {
            width: 300px;
            margin: 0 auto;
        }

        .bubble-container .text .desc {
            font-size: 12px;
            color: #999;
            margin-top: 20px;
        }

        .bubble-container .bubble-content {
            width: 100%;
            height: 380px;
            background-color: #b2dfdb;
            margin-top: 20px;
            border-radius: 20px;
            position: relative;
        }

        .bubble-content .bubble-item {
            border-radius: 50%;
            color: #fff;
            font-weight: bold;
            font-size: 24px;
            text-align: center;
            border:3px solid #fff;

            line-height: 100px;
            width: 100px;
            height: 100px;
            background-color: red;

        }
        .bubble-content .bubble-one {
            width: 50px;
            height: 50px;
            line-height: 50px;
            position: absolute;
            top:50%;
            left: 50%;
            margin-top: -25px;
            margin-left: -25px;
        }
        .bubble-content .bubble-two {
            background-color: #ffd54f;
            width: 80px;
            height: 80px;
            line-height: 80px;
            position: absolute;
            top:30px;
            left:30px;
        }
        .bubble-content .bubble-three {
            width: 100px;
            height: 100px;
            line-height: 100px;
            background-color: #81d4fa;
            position: absolute;
            top:60px;
            left:60px;
        }
        .bubble-content .bubble-item::after{
            content: '';
            display: block;
            width: 20%;
            height: 15%;
            background-color: rgba(0, 0, 0, 0.3);
            position: absolute;
            top: 20%;
            left: 20%;
            border-radius: 50%;
        }
        /* .bubble-content .bubble-one:hover{
            width: 60px;
            height: 60px;
            margin-top: -30px;
            margin-left: -30px;
            line-height: 60px;
        } */

        .bubble-content .bubble-item:hover{
            /* transform 变形 scale 缩放 */
            transform: scale(1.5);
            z-index: 1000;
        }
        
    </style>
</head>

<body>
    <!-- 全屏容器 -->
    <div class="fullscreen-container"></div>
    <!-- 定位气泡容器 -->
    <div class="bubble-container">
        <div class="text">
            <h1>趣味气泡 Position 练习</h1>
            <p class="info">任务： 观察并理解气泡的定位方式，鼠标悬停气泡试试看！</p>
            <p class="desc">（气泡用 absolute，气泡区用 relative，底部说明条用 fixed）</p>
        </div>
        <div class="bubble-content">
            <div class="bubble-item bubble-one">A</div>
            <div class="bubble-item bubble-two">B</div>
            <div class="bubble-item bubble-three">C</div>
        </div>
    </div>
    <!-- 底部信息 -->
    <div class="bottom-info">本页面用于练习 position: relative / absolute / fixed 及 hover/伪元素效果</div>
</body>

</html>