<style>
  body {
    background-color: lightblue;
  }

  h1 {
    color: white;
    text-align: center;
  }

  p {
    font-family: verdana;
    font-size: 20px;
  }

  a {
    color: blue;
    text-decoration: none;
  }
</style>

@@##@@

<audio controls>
  <source src="audio.mp3" type="audio/mpeg">
  <source src="audio.ogg" type="audio/ogg">
  Your browser does not support the audio tag.
</audio>

<video width="320" height="240" controls>
  <source src="video.mp4" type="video/mp4">
  <source src="video.ogg" type="video/ogg">
  Your browser does not support the video tag.
</video>

<form>
  <label for="firstname">名字：</label>
  <input type="text" id="firstname" name="firstname"><br>

  <label for="lastname">姓氏：</label>
  <input type="text" id="lastname" name="lastname"><br>

  <label for="gender">性别：</label>
  <input type="radio" id="male" name="gender" value="male">
  <label for="male">男</label>
  <input type="radio" id="female" name="gender" value="female">
  <label for="female">女</label><br>

  <label for="country">国家：</label>
  <select id="country">
    <option value="china">中国</option>
    <option value="usa">美国</option>
    <option value="uk">英国</option>
  </select><br>

  <input type="submit" value="提交">
</form>