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@@ -0,0 +1,55 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+
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+<head>
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+ <meta charset="UTF-8">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Document</title>
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+ <style>
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+ .box {
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+ width: 200px;
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+ height: 200px;
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+ background-color: red;
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+ }
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+
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+ /* @media 媒体查询 后边为设备类型 screen（电脑、平板、手机） */
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+ /* 设备类型后边可以添加媒体查询条件 表示当前屏幕的尺寸 但是要用and连接 */
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+ /* @media screen and (max-width: 1200px) {
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+ .box{
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+ background-color: blue;
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+ }
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+ }
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+ @media screen and (min-width: 1201px) {
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+ .box{
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+ background-color: green;
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+ }
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+ .div1{
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+ font-size: 20px;
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+ }
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+ } */
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+
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+ /* @media screen and (max-width: 1200px) and (min-width: 600px) {
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+ .box {
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+ background-color: yellow;
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+ }
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+ } */
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+ /* 横向屏幕 媒体查询 */
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+ @media screen and (orientation: landscape) {
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+ .box{
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+ background-color: pink;
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+ }
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+ }
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+ /* 纵向屏幕 媒体查询 */
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+ @media screen and (orientation: portrait) {
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+ .box{
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+ background-color: purple;
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+ }
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+ }
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+ </style>
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+</head>
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+
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+<body>
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+ <div class="box"></div>
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+</body>
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+
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+</html>
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