.product-container {
      max-width: 1200px;
      margin: auto;
      padding: 40px 20px;
      font-family: "Segoe UI", Roboto, sans-serif;
      font-size: 18px;
      line-height: 1.75;
      color: #333;
    }

    .product-container h1 {
      font-size: 32px;
      margin: 30px 0 15px;
      border-left: 5px solid #0078d7;
      padding-left: 12px;
      color: #1a1a1a;
    }

    .product-container h2 {
      font-size: 28px;
      margin: 30px 0 15px;
      border-left: 5px solid #0078d7;
      padding-left: 12px;
      color: #1a1a1a;
    }

    .product-container p {
      margin-bottom: 18px;
    }

    .product-gallery {
      display: flex;
      gap: 16px;
      margin: 35px 0;
    }

    .product-gallery .image-box {
      flex: 1;
      aspect-ratio: 4/3;
      overflow: hidden;
      border-radius: 10px;
      background: #f1f1f1;
    }

    .product-gallery img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      object-position: center;
      display: block;
      cursor: zoom-in;
    }

    .product-container ul {
      margin-left: 1.2em;
      margin-bottom: 25px;
    }

    .product-container ul li {
      margin-bottom: 8px;
    }

    .product-container table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 25px;
      margin-bottom: 40px;
    }

    .product-container th,
    .product-container td {
      padding: 12px 15px;
      border: 1px solid #ddd;
      text-align: left;
    }

    .product-container th {
      background: #f8f8f8;
      font-weight: 600;
    }

    .product-container tr:hover {
      background: #f1faff;
    }

    details {
      margin-bottom: 15px;
      padding: 14px 18px;
      background: #f9f9f9;
      border: 1px solid #ccc;
      border-radius: 6px;
    }

    summary {
      font-size: 18px;
      font-weight: bold;
      cursor: pointer;
    }

    summary::marker {
      color: #0078d7;
    }

    details[open] summary ~ * {
      animation: sweep 0.3s ease-in-out;
    }

    @keyframes sweep {
      from { opacity: 0; margin-top: -10px; }
      to { opacity: 1; margin-top: 0; }
    }

    @media (max-width: 768px) {
      .product-gallery {
        flex-direction: column;
      }
    }