用户投稿以此为模版将需要的内容图片填进去
<!DOCTYPE html><html><head><meta name="viewport" content="width=device-width, initial-scale=1.0"><style>* { box-sizing: border-box;}.left { background-color: #2196F3; padding: 20px; float: left; width: 20%; /* The width is 20%, by default */}.main { background-color: #f1f1f1; padding: 20px; float: left; width: 60%; /* The width is 60%, by default */}.right { background-color: #04AA6D; padding: 20px; float: left; width: 20%; /* The width is 20%, by default */}/* Use a media query to add a break point at 800px: */@media screen and (max-width: 800px) { .left, .main, .right { width: 100%; /* The width is 100%, when the viewport is 800px or smaller */ }}</style></head><body><h2>Media Queries</h2><p>Resize the browser window.</p><p>Make sure you reach the breakpoint at 800px when resizing this frame.</p><div class="left"> <p>Left Menu</p></div><div class="main"> <p>Main Content</p></div><div class="right"> <p>Right Content</p></div></body></html>
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