html, body {
  margin: 0;
  padding: 0;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  background-color: #fff;
  color: #333;
  height: auto;
}

/* SEO隐藏h1 */
.seo-h1 {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
  white-space: nowrap;
}

iframe {
  display: block;
  width: 100%;
  border: none;
}

.mobile-wrapper {
  display: block;
}

/* 手机端样式（屏幕宽度 ≤ 600px） */
@media (max-width: 600px) {
  html, body {
    height: 100%;
  }

  .mobile-wrapper {
    height: 100vh;
  }

  iframe {
    height: 100%;
  }
}

/* 电脑端样式（屏幕宽度 > 600px）- 使用 min() 限制最大宽度，防止溢出 */
@media (min-width: 601px) {
  body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-height: 100vh;
  }

  .mobile-wrapper {
    width: min(120vmin, 95vw);
    height: calc(min(90vmin, 85vh) - 40px);
    margin-top: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    overflow: hidden;
  }

  iframe {
    height: 100%;
  }
}