.header-top{
          display: none;
      }
      header .header-nav .nav-products{
          top: 100px;
      }

    .container-box {
      max-width: 1560px;
      margin: 0 auto;
      padding: 0 20px;
    }
    
    .videos-nav{
      color: #898989;
      font-size: 14px;
      margin: 14px 0 40px 0;
    }

    /* Header Banner */
    .header-banner {
      width: 100%;
      height: 150px;
      background: url('/imgll/videos/top1.png') no-repeat center;
      background-size: cover;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 36px;
      font-weight: bold;
      text-transform: uppercase;
      letter-spacing: 2px;
    }

    /* Tab Navigation */
    .tab-nav {
      display: flex;
      justify-content: flex-start;
      margin: 80px 0 20px;
      border-bottom: 1px solid #ddd;
      padding-bottom: 30px;
    }

    .tab-nav a {
      text-decoration: none;
      color: #333;
      font-weight: bold;
      /*padding: 10px 20px;*/
      margin: 0 120px 0 0;
      font-size: 24px;
      transition: color 0.3s;
    }

    .tab-nav a.active {
      color: #FFD700; /* Gold */
    }

    /* Sub Category Navigation */
    .sub-category-nav {
      display: flex;
      flex-wrap: wrap;
      margin-bottom: 20px;
    }

    .sub-category-nav a {
      text-decoration: none;
      color: #5D6366;
      padding: 5px 10px;
      transition: color 0.3s;
      margin: 0 38px 0 0;
    }

    .sub-category-nav a.active {
      color: #FFD700;
      border-bottom: 2px solid #FFD700;
    }

    /* Video Grid */
    .video-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      margin: -20px;
      padding: 40px 0 0 0;
    }

    .video-card {
      display: inline-block;
      overflow: hidden;
      background: #fff;
      box-shadow: 0 0 20px rgba(0,0,0,0.06);
      margin: 20px;
    }

    .video-thumbnail {
      position: relative;
      width: 100%;
      height: 270px;
      background: #ddd;
      overflow: hidden;
    }

    .video-thumbnail img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .play-button {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 60px;
      height: 60px;
      transition: all 0.3s;
    }

    .play-button:hover {
      transform: translate(-50%, -50%) scale(1.1);
    }

    .video-info {
      display: inline-block;
      padding: 18px 24px 24px 24px;
      height: 100px;
      width: 100%;
    }

    .video-title {
      font-weight: bold;
      margin-bottom: 8px;
      font-size: 18px;
    }

    .video-tags {
      font-size: 12px;
      color: #5D6366;
    }

    .video-card:hover .video-info{
            background: #FFD700;
        }

    /* Pagination */
    .pagination {
      display: flex;
      justify-content: center;
      align-items: center;
      margin: 60px -5px 80px -5px;
    }

    .pagination button,
    .pagination span {
      padding: 5px 10px;
      border: none;
      background: #fff;
      cursor: pointer;
      margin: 5px;
    }

    .pagination button:hover {
      background:#f5f5f5;
    }

     .pagination .current-page {
      background: #FFD700;
      color: #000;
      font-weight: bold;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .video-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 480px) {
      .video-grid {
        grid-template-columns: 1fr;
      }
      .tab-nav {
        flex-wrap: wrap;
        justify-content: center;
      }
      .sub-category-nav {
        justify-content: center;
      }
    }

    /* ===== 视频模态框 ===== */
    .video-modal {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0, 0, 0, 0.95);
      z-index: 1000;
      align-items: center;
      justify-content: center;
    }

    .video-modal.active {
      display: flex;
    }

    .modal-content {
      width: 70%;
      max-width: 1000px;
      background-color: #000000;
      overflow: hidden;
      border: 4px solid #f8c300;
      position: relative;
      box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
    }

    .modal-content video {
      width: 100%;
      display: block;
    }

    .close-modal {
      position: absolute;
      top: 20px;
      right: 30px;
      font-size: 60px;
      color: #ffffff;
      cursor: pointer;
      z-index: 1001;
      font-weight: 300;
      text-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    }

    .close-modal:hover {
      color: #f8c300;
    }