实例代码“Ctrl+/”提示“F11/ESC”全屏 返回 格式化 恢复 运行
​x
 
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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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button
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{
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position:absolute;
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}
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​
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button#b1
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{
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top:20%;left:25%;
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nav-index:1;
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nav-right:#b2; nav-left:#b4;
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nav-down:#b2; nav-up:#b4;
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}
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​
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button#b2
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{
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top:40%;left:50%;
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nav-index:2;
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nav-right:#b3; nav-left:#b1;