* { margin: 0; padding: 0; box-sizing: border-box; }
  .video-page {
    max-width: 1200px;
    margin: 1rem auto;
    background: #ffffff;
    border-radius: 1.5rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    font-family: system-ui, -apple-system, sans-serif;
    color: #1e293b;
  }
  .content-padding { padding: 0 1.5rem; }
  
  /* 优化标题：缩小边距，确保视频上移 */
  .header-section { margin-top: 1.5rem; text-align: center; }
  h1 {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.2;
    background: linear-gradient(145deg, #0b2b4a, #153e5a);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
  }

  /* 视频容器：确保是唯一且显著的 */
  .video-main-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9; /* 现代属性 */
    background: #000;
    margin: 1rem 0 2rem;
  }
  .video-main-container iframe {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    border: 0;
  }

  /* 按钮与信息布局 */
  .cta-group {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
  }
  .btn {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: 0.3s;
  }
  .btn-primary { background: #f15a24; color: white; }
  .btn-secondary { border: 2px solid #153e5a; color: #153e5a; }

  /* 辅助信息 */
  .spec-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 2rem;
    background: #f8fafc;
    border-radius: 20px;
  }
  .feature-list { list-style: none; }
  .feature-list li { margin-bottom: 0.8rem; display: flex; gap: 0.5rem; }
  .feature-list li::before { content: "✓"; color: #f15a24; font-weight: bold; }

  @media (max-width: 768px) {
    h1 { font-size: 1.5rem; }
    .video-page { margin: 0; border-radius: 0; }
  }