案例:CSS3 案例     状态:可编辑再运行    进入竖版
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<!DOCTYPE html>
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<html>
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<head>
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<style>
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#div1
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{
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position: relative;
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height: 200px;
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width: 200px;
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margin: 100px;
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padding:10px;
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border: 1px solid black;
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}
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#div2
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{
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padding:50px;
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position: absolute;
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border: 1px solid black;
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background-color: yellow;
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transform: rotate(45deg);
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transform-origin:20% 40%;
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-ms-transform: rotate(45deg); /* IE 9 */
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-ms-transform-origin:20% 40%; /* IE 9 */
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-webkit-transform: rotate(45deg); /* Safari and Chrome */
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-webkit-transform-origin:20% 40%; /* Safari and Chrome */
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-moz-transform: rotate(45deg); /* Firefox */
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-moz-transform-origin:20% 40%; /* Firefox */
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-o-transform: rotate(45deg); /* Opera */
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-o-transform-origin:20% 40%; /* Opera */
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}
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</style>
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</head>
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<body>
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<div id="div1">
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  <div id="div2">HELLO</div>
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</div>
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</body>
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</html>
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