標籤：idt ges ima float 導致 tac 分析 service .com
一個巨簡單的坑，記錄一下:
class=index的div沒有padding,margin，但上方迷之懸空。
<head>
<meta charset="UTF-8">
<title>About Us</title>
<style>
* {
font-family: ‘Microsoft YaHei‘;
margin: 0;
padding: 0;
}
.index {
width: 1279px;
margin: 0 auto;
}
.kvb_index_category_top {
height: 33px;
font-size: 18px;
margin: 22px 22px 20px 40px;
}
.kvb_index_category_top > li {
list-style: none;
float: left;
padding: 4px 23px;
}
</style>
</head>
<body>
<div class="index">
<div>
<!--<div style="overflow:hidden;">-->
<ul class="kvb_index_category_top">
<li>Home</li>
<li>|</li>
<li>About us</li>
<li>|</li>
<li>Product and service</li>
<li>|</li>
<li>contact us</li>
<li>|</li>
<li>system login</li>
<li>|</li>
<li>download</li>
</ul>
</div>
</div>
</body>
分析:我把頁面刪的只剩這麼點，容易發現問題.最後發現是div子標籤ul設定的margin導致外部div上方溢出。
把margin設定為padding就不會懸空了，或者把div設定成overflow:hidden
html標籤溢出問題
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