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@@ -0,0 +1,67 @@
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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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+ * {
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+ margin: 0;
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+ padding: 0;
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+ box-sizing: border-box;
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+ list-style: none;
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+ text-decoration: none;
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+ }
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+ .content {
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+ width: 200px;
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+ height: 200px;
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+ background: #00f;
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+ color: #fff;
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+ border: 2px solid #ff0;
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+ /* 内边距 复合属性
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+ padding:
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+ 1个值 上下左右
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+ 2个值 上下 左右
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+ 3个值 上 左右 下
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+ 4个值 上 右 下 左
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+ padding-top
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+ padding-bottom
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+ padding-left
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+ padding-right
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+ 外边距 复合属性
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+ margin:
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+ 1个值 上下左右
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+ 2个值 上下 左右
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+ 3个值 上 左右 下
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+ 4个值 上 右 下 左
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+ margin-top
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+ margin-bottom
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+ margin-left
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+ margin-right
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+ */
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+ padding: 20px 10px 30px 40px;
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+ padding-top: 40px;
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+ /* margin: 10px; */
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+
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+ }
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+ .main {
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+ width: 100px;
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+ height: 100px;
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+ background: #f00;
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+ margin: 30px;
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+ }
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+ </style>
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+</head>
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+<body>
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+ <!--
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+ 盒模型
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+ 标准盒模型(IE盒模型) box-sizing:content-box;
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+ width=content(内容) + padding +border
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+ 怪异盒模型:box-sizing:border-box;
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+ width = content(width + padding + border)
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+ -->
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+ <div class="content">
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+ <div class="main"></div>
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+ </div>
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+</body>
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+</html>
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