.contact-form {
  background: #fff;
  border: 1px solid rgba(43, 43, 43, 0.08);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow-soft);
  display: flex;
  justify-content: center;
  /* 水平置中 */
  align-items: center;
  /* 垂直置中 */
  flex-direction: column;
  /* 垂直排列內容 */
  height: 500px;
  box-sizing: border-box;
  overflow-x: hidden;
}

.contact-form iframe {
  width: 100%;
  height: 480px;
  margin: 0 auto;
  display: block;
  border-radius: var(--radius);
  border: 1px solid rgba(43, 43, 43, 0.08);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  background-color: #fff;
  transition: box-shadow 0.3s ease;
}

.contact-form iframe:hover {
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
}