45 lines
1.2 KiB
HTML
45 lines
1.2 KiB
HTML
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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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.box{
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width:1000px;
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height:300px;
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background: gold;
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}
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.box1{
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width:50px;
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height: 50px;
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background:red;
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}
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.box2{
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/* width:80px; */
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height:50px;
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background: blue;
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margin-left: 20px;
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margin-right: 20px;
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}
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.box3{
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background:pink;
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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="box1">aaa</div>
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<div class="box2">bbb</div>
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<p>
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总结margin 一个值得时候定义的是上下左右四个方向的边距
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<p>两个值得时候定义的前一个值是上下的边距 后面的值是左右的边距</p>
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<p>三个值得时候第一个值是上边距 第二个值是左右边距 第三个值是下边距</p>
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<p>四个值得时候是上右下左的边距</p>
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</p>
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</body>
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</html>
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