(1)先访问京东 > 找到第一个css，搜索body，将初始样式扣下来 * { margin: 0; padding: 0; box-sizing: border-box;}em,i { font-style: normal}li { list-style: none}img { border: 0; vertical-align: middle}button { cursor: pointer}a { color: #666; text-decoration: none}a:hover...
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