相关样式
<style type="text/css">
* {
margin: 0;
padding: 0
}
html,
body {
height: 100%;
}
.container {
display: flex;
flex-direction: column;
height: 100%;
}
.header {
flex: 0 0 auto;
}
.main-bg {
flex: 1 0 auto;
}
.footer {
flex: 0 0 auto;
}
</style>
页面
<body>
<div class="container">
<div class="header">
header
</div>
<div class="main-bg">
main
</div>
<div class="footer">footer</div>
</div>
</body>
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