47 lines
1.1 KiB
HTML
47 lines
1.1 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:600px;
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height:300px;
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background: gold;
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/* padding-top:50px;
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border-top: 1px solid white;
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overflow: hidden; */
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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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/* margin-top: 50px; */
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}
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.box2{
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width:50px;
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height:50px;
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background: blue;
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margin-top: 100px;
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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="box">
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<div class="box1">中国</div>
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</div>
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<p>总结：当只给中国加上边距时，他外层的父元素也会跟着往下移动 ，这种现象叫父子级的边距合并
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解决方式：padding-top:50px;
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border-top: 1px solid white;
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overflow: hidden
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</p>
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</body>
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</html>
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