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我有以下的HTML ...絕對定位的內容重疊頁腳
<div class="maincontent">
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec at metus nisi. Sed blandit, nunc eget ornare porta, lorem est cursus eros, in ultricies enim mi eget leo. Integer a odio at neque lobortis fermentum ac at purus. Vivamus faucibus nec tortor at sagittis. Nam lectus metus, scelerisque vehicula orci ac, lacinia elementum lorem. Nam efficitur mauris quis tortor efficitur, vitae viverra metus semper. Nunc id euismod purus.
<div class="container">
<div class="box1">
Box 1 Content
</div>
<div class="box2">
Box 2 Content
</div>
<div class="box3">
Box 3 Content
</div>
</div>
</div>
<footer>
This is the footer
</footer>
.container{position:relative;}
.box1{position:absolute;top:0;background:red;color:white;}
.box2{position:absolute;top:20px;background:green;color:white}
.box3{position:absolute;top:40px;background:blue;color:white;}
https://jsfiddle.net/25w7cxv1/
出於某種原因,頁腳顯示不正確,並正在由內容的其餘部分重疊。我究竟做錯了什麼?