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模态框练习
啊℃。㏄
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模态框界面

html：

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  6.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  7.     <title>练习模态框</title>
  8.     <link rel="stylesheet" href="作业1.css">
  9. </head>
  10. <body>
  12.     <header>
  13.         <h2>后台管理系统</h2>
  14.         <button>登录</button>
  15.     </header>
  16.     <!-- 模态框 -->
  17.     <div class="modal">
  18.         <!-- 半透明的遮罩 -->
  19.         <div class="modal-bg"></div>
  20.             <!-- 弹窗表单 -->
  21.             <form action="" class="my_form">
  22.                 <fieldset style="display: grid;gap: 1em;">
  23.                     <legend>用户登录</legend>
  24.                     <label for="user">账号:</label>
  25.                     <input type="text" id="user" placeholder="请输入账号">
  26.                     <label for="pwd">密码:</label>
  27.                     <input type="password" id="pwd" placeholder="至少8位">
  28.                     <button>登录</button>
  29.                 </fieldset>
  30.             </form>
  32.     </div>
  35. </body>
  36. </html>

css:

  1. /* 初始化 */
  2. * {
  3.     margin: 0;
  4.     padding: 0;
  5.     box-sizing: border-box;
  6. }
  8. /* 头部 */
  9. header {
  10.     background-color:chocolate;
  11.     padding: 1.5em 1em;
  12.     display: flex;
  13. }
  15. /* logo */
  16. header > h2 {
  17.     margin-left: auto ;
  18.     margin-right: auto;
  19.     color:azure;
  21. }
  23. /* 登录按钮 */
  24. header > button {
  25.     letter-spacing: 2px;
  26.     border: none;
  27.     border-radius: 0.5em;
  28.     width: 5em;
  29. }
  30. header >button:hover {
  31.     cursor: pointer;
  32.     background-color:blueviolet;
  33.     color: white;
  34.     transition: 0.5s;
  35.     box-shadow: 0 0 10px white;
  36. }
  38. /* 模态框 */
  39.  .modal .my_form fieldset {
  41.      height: 18em;
  42.      border: none;
  43.      padding: 3em 7em;
  44.      background-color:gainsboro;
  46.  }
  48.  /* 模态框表单内容 */
  49.  .modal .my_form fieldset input {
  50.         height: 25px;
  51.         outline: none;
  52.         margin-left: 1em;
  53.         border: 1px solid white;
  54.  }
  55.  /* 获取焦点后，阴影发光 */
  56.  .modal .my_form fieldset input:focus {
  57.      box-shadow:  0 0 10px black;
  58.  }
  59.     /* 表单登录按钮 */
  60.  .modal .my_form fieldset button {
  61.     cursor: pointer;
  62.     font-size: 15px;
  63.     letter-spacing: 3px;
  64.     border-radius: 1.5em;
  65.  }
  66.  /* 登录键鼠标悬停 */
  67.  .modal .my_form fieldset button:hover {
  68.      background-color:blueviolet;
  69.      color: white;
  70.      outline: none;
  71.      border-radius: 1.5em;
  72.      transition: 0.5s;
  73.      border: 1px solid ;
  74.      box-shadow: 0 0 10px white;
  75. }
  79. /* 定位 */
  80.  .modal .my_form {
  81.      position: fixed;   
  82.      top: 15em;
  83.      left: 35em;
  84.      right:40em;
  85.  }
  87.  /* 遮罩半透明 */
  88.  .modal .modal-bg {
  89.      position: fixed;
  90.      top: 0;
  91.      left: 0;
  92.      right: 0;
  93.      bottom: 0;
  94.      background-color:rgb(0,0,0,0.5 );
  95.  }

效果如下：

Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：
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