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.a{ width: 100px; height: 300px; background-color: #286090;}.a div{ width: 50px; height: 50px; background-color: aqua; text-align: center;} <div class 阅读全文
摘要:
<style> 方法一:首先编写两个div,并用边框和背景区分开 .box { width: 200px; height: 200px; border: 1px solid red; } .block{ width: 50px; height: 50px; } </style> <div class 阅读全文
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<div class="box box1"> <span>垂直居中</span> </div> 阅读全文
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.a{ position: relative; left:100px;top:50px;} 阅读全文
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.p{ } 阅读全文