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<!DOCTYPE html><html lang="en">
<head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <style> @media screen and (max-width: 768px) {
/* 设备小于768px加载样式 */ body { background-color: red; } }
@media screen and (max-width: 992px) and (min-width: 768px) {
/* 设备小于768px但小于992px加载样式 */ body { background-color: pink; } }
@media screen and (min-width: 992px) {
/* 设备大于992px加载样式 */ body { background-color: green; } } </style></head>
<body>
</body>
</html>
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