建立顶部固定部分：
<!DOCTYPE html>
<html lang="en">
<head>
<title>置顶</title>
<meta charset="utf-8" name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0"/>
<style>
body {
margin: 0;
}
#title {
position: fixed;
width: 100%;
height: 46px;
background-color: white;
border-bottom:3px solid #5ebafe;
}
#items {
padding-top: 46px;
}
#items div {
width: 100%;
height: 200px;
text-align: center;
border: #600f0d 1px solid;
}
</style>
</head>
<body>
<div id="content">
<div id="title">
</div>
<div id="items">
<div>1</div>
<div>2</div>
<div>3</div>
<div>4</div>
<div>5</div>
<div>6</div>
<div>7</div>
<div>8</div>
<div>9</div>
<div>10</div>
</div>
</div>
</body>
</html>