lovecoding
/
W250913


			
				
					
						
						
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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>
        .bc{
            position: fixed;
            top:0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: #f0f4c3;
        }
        /*fixed absolute 定位之后的元素 之前的空间会被释放掉 默认宽度为内容宽度 */
        .footer{
            position: fixed;
            bottom: 0;
            left: 0;
            z-index: 1;
            background-color: #fffde7;
            width: 100%;
            height: 50px;
            text-align: center;
            line-height: 50px;
            color: #b28704;
        }
        .content{
            width: 500px;
            background-color: #fff;
            position: absolute;
            z-index: 2;
            left: 50%;
            top:100px;
            margin-left: -250px;
            text-align: center;
            padding:20px;
            border-radius: 20px;
        }
        .content h1{
            color: #689f38;
        }
        .content .info{
            width: 300px;
            margin: 10px auto;
        }
        .content .desc{
            color: #999;
            font-size: 12px;
        }
        .content .bubble-content{
            background-color: #b2dfdb;
            width: 500px;
            height: 400px;
            border-radius: 20px;
            position: relative;
        }
        .content .bubble-content .bubble-one{
            width: 50px;
            height: 50px;
            background-color: red;
            border:3px solid #fff;
            position: absolute;
            left: 50%;
            top: 50%;
            margin-top: -25px;
            margin-left: -25px;
            border-radius: 50%;
            color: white;
            font-weight: bold;
            line-height: 50px;
        }
        .content .bubble-content .bubble-two{
            width: 80px;
            height: 80px;
            border:3px solid #fff;
            background-color: #ffd54f;
            border-radius: 50%;
            color: #fff;
            font-weight: bold;
            line-height: 80px;
            position: absolute;
            top: 50px;
            left: 50px;
        }
        .content .bubble-content .bubble-three{
            width: 100px;
            height: 100px;
            border:3px solid #fff;
            background-color: #81d4fa;
            border-radius: 50%;
            color: #fff;
            font-weight: bold;
            line-height: 100px;
            position: absolute;
            top: 80px;
            left: 80px;
        }
        .content .bubble-content div::after{
            content: "";
            display: block;
            width: 25%;
            height: 20%;
            background-color: rgba(255,255,255,0.5);
            position: absolute;
            top:20%;
            left: 20%;
            border-radius: 50%;
            /* opacity: 0.5; */
        }
        .content .bubble-content div:hover{
            padding: 20px;
            margin-top: -20px;
            margin-left: -20px;
            z-index: 1;
        }
        .content .bubble-content .bubble-one:hover{
            margin-left: -45px;
            margin-top: -45px;
        }
    </style>
</head>
<body>
    <div class="bc"></div>
    <div class="content">
        <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 class="bubble-content">
            <div class="bubble-one">A</div>
            <div class="bubble-two">B</div>
            <div class="bubble-three">C</div>
        </div>
    </div>
    <div class="footer">
        <span>本页面用于练习 position: relative / absolute / fixed 及 hover/伪元素效果</span>
    </div>
</body>
</html>