.product-images .main-image .slick-arrow {
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
        background: rgba(0, 0, 0, 0.4);
        color: #fff;
        border: none;
        border-radius: 50%;
        width: 36px;
        height: 36px;
        z-index: 3;
        cursor: pointer;
        box-shadow: 0 0 10px rgba(0,0,0,0.4);
        display: flex;
        align-items: center;
        justify-content: center;
      }

      .product-images .main-image .slick-prev {
        left: 10px;
      }

      .product-images .main-image .slick-next {
        right: 10px;
      }


      .thumb-slider {
        width: 80px;
        max-height: 500px;
        overflow-y: auto;
        overflow-x: hidden;
        position: relative;
        z-index: 2;
        padding-right: 4px;
        scroll-behavior: smooth;
      }

      .thumb-slider::-webkit-scrollbar {
        width: 5px;
      }
      .thumb-slider::-webkit-scrollbar-thumb {
        background-color: #ccc;
        border-radius: 10px;
      }


      .product-images {
        display: flex;
        flex-direction: row;
        gap: 20px;
        align-items: flex-start;
      }

      .main-image {
        flex: 1;
        position: relative;
      }

      .main-image img {
        width: 100%;
        height: auto;
        display: block;
      }

      .thumb-slider-inner {
        display: flex;
        flex-direction: column;
        transition: transform 0.3s;
      }

      .main-image .slick-slide,
      .thumb-slider img {
        background-color: #f5f5f5; /* Nền xám nhạt */
        aspect-ratio: 1 / 1;
        display: flex;
        align-items: center;
        justify-content: center;
        overflow: hidden;
        border-radius: 8px;

      }
      .thumb-slider img {
        width: 100%;
        aspect-ratio: 1 / 1;
        margin-bottom: 10px;
        border: 2px solid transparent;
        border-radius: 4px;
        cursor: pointer;
        object-fit: contain;
        transition: border 0.3s;
        background-color: #f5f5f5;
      }

      .thumb-slider img:hover,
      .thumb-slider img.active-thumb {
        border-color: #007bff;
        box-shadow: 0 0 4px rgba(0,123,255,0.5);
      }

      .main-image img,
      .thumb-slider img {
        max-width: 100%;
        max-height: 100%;
        width: auto;
        height: auto;
        object-fit: contain;
      }

      .thumb-slider img:hover {
        border-color: #007bff;
      }

      .thumb-nav {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        width: 100%;
        display: flex;
        flex-direction: column;
        gap: 5px;
        z-index: 3;
      }

      .thumb-nav button {
        background: rgba(0, 0, 0, 0.4);
        border: none;
        color: white;
        width: 30px;
        height: 30px;
        border-radius: 50%;
        box-shadow: 0 0 8px rgba(0,0,0,0.5);
        cursor: pointer;
      }
        .product-images {
            display: flex;
            flex-direction: row;
            gap: 20px;
            align-items: flex-start;
          }

          .main-image {
            flex: 1;
            position: relative;
          }

          .main-image img {
            width: 100%;
            height: auto;
            display: block;
          }
      .hero-wrap.third-height-banner {
        height: 33vh; /* 1/3 màn hình */
        min-height: 220px;
        max-height: 300px;
        background-size: cover;
        background-position: center;
        position: relative;
      }
    

          /* điều hướng nội dung và sticky sidebar*/
            .product-section-nav {
              position: sticky;
              top: 80px;
              background-color: #fff;
              padding: 15px 0;
              border-bottom: 1px solid #ddd;
              z-index: 10;
            }

            .product-section-nav ul {
              list-style: none;
              padding-left: 0;
              display: flex;
              flex-wrap: wrap;
              gap: 20px;
              font-weight: 600;
            }

            .product-section-nav li {
            cursor: pointer;
            }

            .product-section {
              margin-bottom: 50px;
            }

            .product-section h4 {
              font-weight: bold;
              margin-bottom: 15px;
            }

            .product-section img.full-width {
              width: 100%;
              margin-bottom: 20px;
              display: block;
            }
                
            .sticky-sidebar {
            position: sticky;
            top: 80px;
            background: #f8f9fa;
            padding: 20px;
            border: 1px solid #eaeaea;
            border-radius: 4px;
            }

            .sticky-sidebar ul {
            padding-left: 0;
            }

            .sticky-sidebar ul li {
            margin-bottom: 10px;
            }

            .sticky-sidebar ul li a {
            text-decoration: none;
            color: #007bff;
            }

            .sticky-sidebar ul li a:hover {
            text-decoration: underline;
            }
            #stickySidebar {
              position: sticky;
              top: 100px; /* Cách top một khoảng, giúp tránh đè lên navbar */
              z-index: 998;
              background: #ffffff;
              padding: 20px;
              border-radius: 12px;
              box-shadow: 2px 2px 6px rgba(0, 0, 0, 0.1); /* Nhẹ nhàng, mờ chéo phải-dưới */
              transition: all 0.3s ease;
            }

            .product-navigation-box {
            position: static;
            top: - 80px;
            }

            .product-navigation-box ul {
            padding-left: 0;
            }

            .product-navigation-box ul li {
            margin-bottom: 10px;
            }

            .product-navigation-box ul li a {
            text-decoration: none;
            color: #007bff;
            }

            .product-navigation-box ul li a:hover {
            text-decoration: underline;
            }

            /* Hover nhẹ cho từng khối nếu muốn thêm sinh động */
            #stickySidebar:hover {
              box-shadow: 3px 3px 8px rgba(0, 0, 0, 0.15); /* Tăng nhẹ bóng khi hover */
            }

/* Video Khung responsive, không viền */
  .video-wrap {
    position: relative;
    width: 100%;
    height: 100%;
    margin: 0 auto;
    aspect-ratio: 16 / 9; /* giữ tỷ lệ, không cần padding hack */
    overflow: hidden;
  }
  .video-wrap iframe {
    position: absolute; inset: 0;
    width: 100%; height: 100%;
    border: 0;
    pointer-events: none; /* chặn tương tác để trông như GIF */
  }