.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;
    margin: 0 auto;
    padding: 0 24px;
    background: #fff;
  }
  .product-detail-wrapper h1 {
    font-size: 2.2em;
    font-weight: 700;
    color: #1a1a1a;
    margin-top: 1.2em;
    margin-bottom: 0.4em;
    line-height: 1.3;
  }
  .product-detail-wrapper .subtitle {
    font-size: 1.1em;
    color: #555;
    margin-bottom: 1.8em;
  }
  .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;
  }

  .video-container {
    width: 100%;
    max-width: 100%;
    margin: 2.5em 0;
    position: relative;
    padding-bottom: 56.25%;
    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;
  }

  .function-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin: 2em 0 2.5em;
  }
  .func-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 22px 20px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.05);
    border: 1px solid #f0f0f0;
    transition: transform 0.25s, box-shadow 0.25s;
    border-left: 4px solid #e74c3c;
  }
  .func-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 28px rgba(0,0,0,0.1);
  }
  .func-card h3 {
    margin-top: 0;
    margin-bottom: 0.5em;
    font-size: 1.2em;
    color: #1a1a1a;
  }
  .func-card p {
    font-size: 0.95em;
    color: #555;
    margin-bottom: 0;
  }

  .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%;
  }

  .roi-list {
    list-style: none;
    padding: 0;
    margin: 1.8em 0 2.5em;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .roi-list li {
    background: #fff;
    padding: 18px 20px;
    border-radius: 12px;
    border: 1px solid #eee;
    box-shadow: 0 2px 10px rgba(0,0,0,0.04);
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 0.95em;
    line-height: 1.5;
  }
  .roi-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    background: #fce4e4;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #e74c3c;
  }

  .faq-block {
    margin: 1.5em 0 2em;
  }
  .faq-block h3 {
    margin-bottom: 0.2em;
    font-size: 1.3em;
  }
  .faq-block p {
    margin-bottom: 1.5em;
  }

  .inquiry-section {
    text-align: center;
    margin: 3em 0 2.5em;
  }
  .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);
  }

  @media (max-width: 768px) {
    .product-detail-wrapper { padding: 0 18px; }
    .product-detail-wrapper h1 { font-size: 1.8em; }
    .product-detail-wrapper h2 { font-size: 1.7em; }
    .function-grid { grid-template-columns: 1fr; }
    .roi-list { grid-template-columns: 1fr; }
  }

  @media (max-width: 480px) {
    .product-detail-wrapper h1 { font-size: 1.6em; }
    .product-detail-wrapper h2 { font-size: 1.5em; }
  }