lovecoding
/
W250511


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box1 div{
            width: 100px;
            height: 100px;
            background-color: blue;
            color: white;
            font-size: 30px;
            font-weight: bolder;
            margin:10px;
            text-align: center;
            /* line-height 值控制行元素的行高 行元素默认在他所在这一行中垂直居中 */
            line-height: 100px;
            float: left;
        }
        .box2 .div2{
            width: 100px;
            height: 100px;
            background-color: red;
            margin: 10px;
            color: white;
            font-size: 30px;
            font-weight: bolder;
            text-align: center;
            line-height: 100px;
            float: right;
        }
        .box3 .div3{
            width: 100px;
            height: 100px;
            background-color: green;
            margin: 10px;
            color: white;
            font-size: 30px;
            font-weight: bolder;
            text-align: center;
            line-height: 100px;
        }
        .box1,.box2,.box3{
            border: 3px solid black;
            height: 150px;
        }
        .box3 .left{
            float: left;
            /* background-color: rgba(0,255,0,0.2); */
            /* margin-top: 100px; */
        }
        .box3 .center{
            color: black;
            /* margin-left: 100px; */
            margin:10px auto;
        }

        
        .right{
            float: right;
        }

    </style>
</head>
<body>
    <!-- 浮动元素会脱离文档流 释放之前占用的位置 会覆盖其他元素 -->
    <div class="box1">
        <div class="div1">
            <span>1</span>
        </div>
        <div class="div1">2</div>
        <div class="div1">3</div>
    </div>

    <div class="box2">
        <div class="div2">1</div>
        <div class="div2">2</div>
        <div class="div2">3</div>
    </div>
    <div class="box3">
        <div class="div3 left">左</div>
        <!-- <div class="div3 center">中</div> -->
        <div class="div3 right">右</div>
        <div class="div3 center"> 中 </div>
    </div>
</body>
</html>