/* 全局重置与字体 */
  .product-detail-wrapper * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  .product-detail-wrapper {
    font-family: Arial, Helvetica, sans-serif;
    color: #2c3e50;
    line-height: 1.7;
    width: 100%;
    max-width: 1280px;        /* 比之前更宽，充分利用页面空间 */
    margin: 0 auto;
    padding: 0 24px;
    background: #fff;
  }
  /* 标题体系 */
  .product-detail-wrapper h2 {
    font-size: 2em;
    font-weight: 700;
    color: #1a1a1a;
    margin-top: 2.5em;
    margin-bottom: 0.5em;
    border-bottom: 3px solid #e74c3c;
    display: inline-block;
    padding-bottom: 0.2em;
  }
  .product-detail-wrapper h3 {
    font-size: 1.4em;
    font-weight: 600;
    color: #2c3e50;
    margin-top: 1.8em;
    margin-bottom: 0.5em;
  }
  .product-detail-wrapper p {
    margin-bottom: 1.3em;
    color: #444;
  }
  .product-detail-wrapper ul {
    margin-left: 1.8em;
    margin-bottom: 1.5em;
  }
  .product-detail-wrapper li {
    margin-bottom: 0.6em;
  }

  /* ========== YouTube 视频容器：响应式 + 铺满 ========== */
  .video-container {
    width: 100%;
    max-width: 100%;
    margin: 2.5em 0;
    position: relative;
    padding-bottom: 56.25%;   /* 16:9 比例 */
    height: 0;
    overflow: hidden;
    background: #000;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
  }
  .video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
  }

  /* 技术参数表格 */
  .specs-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.8em 0 2.5em;
    background: white;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    border-radius: 10px;
    overflow: hidden;
  }
  .specs-table th, .specs-table td {
    padding: 14px 18px;
    text-align: left;
    border-bottom: 1px solid #eee;
  }
  .specs-table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #1a1a1a;
    width: 38%;
  }

  /* ========== 手柄展示：第一行4个，第二行3个居中 ========== */
  .handpiece-section {
    margin: 2.5em 0;
  }
  .handpiece-row-first {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 24px;
  }
  .handpiece-row-second {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
  }
  .handpiece-row-second .handpiece-card {
    width: calc((100% - 3 * 24px) / 4);
    min-width: 160px;
  }
  .handpiece-card {
    background: #ffffff;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0,0,0,0.06);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    display: flex;
    flex-direction: column;
  }
  .handpiece-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 32px rgba(0,0,0,0.1);
  }
  .handpiece-img-box {
    width: 100%;
    height: 280px;
    background: #f7f9fc;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-bottom: 2px solid #f0f0f0;
  }
  .handpiece-img-box img {
    max-width: 85%;
    max-height: 85%;
    object-fit: contain;
    display: block;
    transition: transform 0.3s;
  }
  .handpiece-card:hover .handpiece-img-box img {
    transform: scale(1.03);
  }
  .handpiece-info {
    padding: 20px 18px 22px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
  .handpiece-info .hp-name {
    font-size: 1.1em;
    font-weight: 700;
    color: #1a1a1a;
    letter-spacing: 0.3px;
  }
  .handpiece-info .hp-desc {
    font-size: 0.9em;
    color: #555;
    line-height: 1.5;
    margin-bottom: 4px;
  }
  .hp-tag {
    display: inline-block;
    font-size: 0.7em;
    font-weight: 700;
    padding: 4px 14px;
    border-radius: 20px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin: 4px auto 0;
    width: fit-content;
  }
  .hp-tag.standard {
    background: #1e2b3c;
    color: #fff;
  }
  .hp-tag.optional {
    background: #e67e22;
    color: #fff;
  }

  /* 询盘按钮 */
  .inquiry-section {
    text-align: center;
    margin: 3em 0 2em;
  }
  .inquiry-btn {
    display: inline-block;
    background: #e74c3c;
    color: white;
    font-size: 1.3em;
    font-weight: 700;
    padding: 18px 42px;
    border-radius: 50px;
    text-decoration: none;
    box-shadow: 0 8px 20px rgba(231,76,60,0.3);
    transition: background 0.3s, box-shadow 0.3s, transform 0.2s;
    letter-spacing: 0.4px;
  }
  .inquiry-btn:hover {
    background: #c0392b;
    box-shadow: 0 12px 28px rgba(192,57,43,0.4);
    transform: translateY(-2px);
  }

  /* ========== 响应式优化（平板 + 手机） ========== */
  @media (max-width: 992px) {
    .product-detail-wrapper {
      padding: 0 20px;
    }
    .product-detail-wrapper h2 {
      font-size: 1.8em;
    }
    .handpiece-row-first {
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }
    .handpiece-row-second {
      justify-content: flex-start;
    }
    .handpiece-row-second .handpiece-card {
      width: calc((100% - 20px) / 2);
    }
    .handpiece-img-box {
      height: 240px;
    }
  }

  @media (max-width: 600px) {
    .product-detail-wrapper h2 {
      font-size: 1.6em;
    }
    .handpiece-row-first {
      grid-template-columns: 1fr;
    }
    .handpiece-row-second {
      flex-direction: column;
      align-items: center;
    }
    .handpiece-row-second .handpiece-card {
      width: 100%;
      max-width: 360px;
    }
    .handpiece-img-box {
      height: 220px;
    }
    .specs-table th, .specs-table td {
      padding: 10px 12px;
    }
  }