html, body {
height: 100%;
margin: 0;
padding: 0;
}
nav {
padding-top: 10px;
margin-left: 20px;
}
article {
min-height: 100%;
height: auto !important;
height: 100%;
padding-left: 20px;
}
footer {
position: relative;
margin-top: -60px; /*等于footer的高度*/
height: 60px;
clear: both;
}
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