position:relative(在相对定位的元素上设置top,right,bottom,left属性会使其偏离其正常的位置)

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>10.relative</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        .relative1 {
            position: relative;
            background: red;
        }

        .relative2 {
            position: relative;
            top: -20px;
            left: 20px;
            background: greenyellow;
            width: 500px;
            height: 500px;
        }
    </style>
</head>
<body>
<div class="relative1">
    relative的表现和static同样,除非你添加了一些额外的属性
</div>
<div class="relative2">

</div>
</body>
</html>
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