* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
  }
  body {
    background: #f7f9fc;
    color: #222;
    line-height: 1.6;
  }
  .container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 40px 20px;
  }
  .case-header {
    background: #fff;
    border-radius: 8px;
    padding: 24px;
    margin-bottom: 32px;
    box-shadow: 0 2px 10px rgba(25, 118, 210, 0.08);
  }
  .case-title {
    font-size: 28px;
    margin-bottom: 16px;
    color: #1976d2;
  }
  .case-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin-bottom: 16px;
  }
  .meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .meta-item span:first-child {
    font-weight: 600;
    color: #1976d2;
  }
  .case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }
  .case-tag {
    padding: 4px 12px;
    background: #e3f2fd;
    color: #1976d2;
    border-radius: 4px;
    font-size: 13px;
  }

  .content-left {
    background: #fff;
    border-radius: 8px;
    padding: 28px;
    box-shadow: 0 2px 10px rgba(25, 118, 210, 0.08);
  }
  .section-title {
    font-size: 22px;
    margin: 0 0 16px 0;
    color: #1976d2;
    padding-bottom: 8px;
    border-bottom: 1px solid #e3f2fd;
  }
  .section-content {
    margin-bottom: 32px;
    color: #444;
    font-size: 16px;
  }
  .solution-list {
    list-style: none;
    margin: 12px 0;
  }
  .solution-list li {
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
  }
  .solution-list li::before {
    content: "•";
    color: #1976d2;
    font-weight: bold;
    position: absolute; left: 0;
  }
  .highlights {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 12px;
  }
  .highlight-item {
    flex: 1;
    min-width: 200px;
    background: #f0f7ff;
    padding: 16px;
    border-radius: 6px;
  }
  .highlight-item h4 {
    margin-bottom: 8px;
    font-size: 16px;
    color: #1976d2;
  }

  /* 产品卡片 */
  .product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 16px;
  }
  .product-card {
    background: #f7f9fc;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(25,118,210,0.08);
    transition: 0.3s;
  }
  .product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 16px rgba(25,118,210,0.15);
  }
  .product-card a {
    text-decoration: none;
    color: inherit;
    display: block;
  }
  .product-img {
    width: 100%;
    height: 220px;
    object-fit: contain;
  }
  .product-name {
    padding: 12px;
    text-align: center;
    font-weight: 600;
    color: #1976d2;
  }

  /* 实景图 */
  .image-gallery {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 16px;
  }
  .gallery-img {
    width: 100%;
    height: 500px;
    border-radius: 6px;
    object-fit: cover;
  }

  /* 视频通用：电脑+手机全部铺满 */
  .video-gallery iframe{
    width: 100% !important;
    height: auto !important;
    aspect-ratio: 16 / 9;
    border-radius: 6px;
    border: none;
  }

  /* 移动端专属优化：去掉外框架、全屏显示 */
  @media (max-width: 768px) {
    .container {
      padding: 0;
    }
    .case-header {
      border-radius: 0;
      box-shadow: none;
      margin-bottom: 0;
    }
    .content-left {
      border-radius: 0;
      box-shadow: none;
      padding: 24px 16px;
    }
    .product-grid {
      grid-template-columns: 1fr;
    }
    .gallery-img {
      height: 280px;
      border-radius: 4px;
    }
  }