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@@ -0,0 +1,29 @@
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+<!DOCTYPE html>
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+<html lang="en">
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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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+ body{
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+ margin: 0;
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+ }
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+ .box{
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+ /* vw viewport width 是相对于视口的宽度 1vw = 1%视口宽度 */
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+ width: 100vw;
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+ /* vh viewport height 是相对于视口的高度 1vh = 1%视口高度 */
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+ height: 100vh;
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+ background-color: blue;
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+ }
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+ .box1{
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+ height: 100px;
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+ width: calc(100vw - 1000px);
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+ background-color: red;
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+ }
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+ </style>
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+</head>
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+<body>
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+ <!-- <div class="box"></div> -->
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+ <div class="box1"></div>
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+</body>
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+</html>
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