howto 在线编辑器 | howto代码测试

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>body {
  font-family: Arial, Helvetica, sans-serif;
}

* {
  box-sizing: border-box;
}

/* Style inputs */
input[type=text], select, textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid #ccc;
  margin-top: 6px;
  margin-bottom: 16px;
  resize: vertical;
}

input[type=submit] {
  background-color: #4CAF50;
  color: white;
  padding: 12px 20px;
  border: none;
  cursor: pointer;
}

input[type=submit]:hover {
  background-color: #45a049;
}

/* 为container/contact部分设置样式 */
.container {
  border-radius: 5px;
  background-color: #f2f2f2;
  padding: 10px;
}

/* 创建两列并排浮动 */
.column {
  float: left;
  width: 50%;
  margin-top: 6px;
  padding: 20px;
}

/* 清除列后的浮点数 */
.row:after {
  content: "";
  display: table;
  clear: both;
}

/* 响应式布局 - 当屏幕宽度小于 600px 时，使两列堆叠在彼此之上而不是彼此相邻 */
@media screen and (max-width: 600px) {
  .column, input[type=submit] {
    width: 100%;
    margin-top: 0;
  }
}
</style>
</head>
<body>

<h2>响应式联系部分</h2>
<p>调整浏览器窗口大小以查看效果。</p>

<div class="container">
  <div style="text-align:center">
    <h2>联系我们</h2>
    <p>顺便喝杯咖啡，或给我们留言：</p>
  </div>
  <div class="row">
    <div class="column">
      <img src="../w3images/map.jpg" style="width:100%">
    </div>
    <div class="column">
      <form action="https://www.cainiaomax.com/action_page.php">
        <label for="fname">First Name</label>
        <input type="text" id="fname" name="firstname" placeholder="Your name..">
        <label for="lname">Last Name</label>
        <input type="text" id="lname" name="lastname" placeholder="Your last name..">
        <label for="country">Country</label>
        <select id="country" name="country">
          <option value="australia">Australia</option>
          <option value="canada">Canada</option>
          <option value="usa">USA</option>
        </select>
        <label for="subject">Subject</label>
        <textarea id="subject" name="subject" placeholder="Write something.." style="height:170px"></textarea>
        <input type="submit" value="提交">
      </form>
    </div>
  </div>
</div>

</body>
</html>

报个问题: