13_盒子模型 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        /*body总有一个默认的外边距margin: 0,常见操作*/
     /* h1,ul,li,a,body{
            margin: 0;
            padding: 0;
            text-decoration: none;
        }*/
        /*border:粗细，样式，颜色*/
        #box{
            width: 300px;
            border: 1px solid red;
            margin: 0 auto;
        }
        h2{
            font-size: 16px;
            background-color: #5cf6c9;
            line-height: 30px;
            margin: 0;
            text-align: center;
            
        }

        form{
            background: #5cf6c9;
        }
        div:nth-of-type(1) input{
            border: 3px solid black;
        }
        div:nth-of-type(2)input{
            border: 3px;solid-color: #1a0d13;
        }
    </style>
</head>
<body>


<div id="box">
    <h2>会员登录</h2>
    <form action="#">
        <div>
            <span>用户名：</span>
            <input type="text">
        </div>
        <div>
            <span>密码：</span>
            <input type="text">
        </div>
        <div>
            <span>邮箱：</span>
            <input type="text">
        </div>
    </form>

</div>
</body>
</html>

结果展示

 

posted @ 2022-08-05 19:17  tuyin  阅读(24)  评论(0)    收藏  举报