lovecoding
/
VIP32


			
				
					
						
						
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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>
        .box {
            width: 300px;
            height: 100px;
            background: #0f0;
        }
        .btn {
            width: 300px;
            height: 100px;
            color: #00f;
            text-align: center;
            line-height: 100px;
        }
        .main {
            opacity: 0;
            /* display: none; */
        }
        .box:hover .main {
            opacity: 1;
            /* display: block; */
        }
    </style>
</head>
<body>
    <!-- 
        类选择器
            写法：
                在body里
                开始标签中 class="xxx"
                在style中
                .xxx {样式....}

     -->
     <div class="box">
        <p class="btn">我的标签</p>
        <p class="main">具体内容</p>
     </div>
</body>
</html>