:root {
      --page-b52doithuong-primary-color: #f7b32b; /* Vàng cam */
      --page-b52doithuong-secondary-color: #2c3e50; /* Xám đậm */
      --page-b52doithuong-accent-color: #e74c3c; /* Đỏ */
      --page-b52doithuong-text-light: #ecf0f1; /* Trắng nhạt */
      --page-b52doithuong-text-dark: #34495e; /* Xám xanh đậm */
      --page-b52doithuong-bg-dark: #1a252f; /* Nền rất đậm */
      --page-b52doithuong-bg-light: #fdfdfd; /* Nền rất nhạt */
      --page-b52doithuong-border-color: #3f526b; /* Viền xám */
    }

    .page-b52doithuong {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      line-height: 1.6;
      color: var(--page-b52doithuong-text-dark);
      background-color: var(--page-b52doithuong-bg-light);
      padding-bottom: 80px; /* Dành chỗ cho nút nổi */
    }

    .page-b52doithuong .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 15px;
    }

    /* Banner chính */
    .page-b52doithuong .hero-section {
      position: relative;
      text-align: center;
      padding-top: 160px; /* Vùng an toàn cho header/menu nổi */
      background-color: var(--page-b52doithuong-bg-dark);
      overflow: hidden; /* Đảm bảo hình ảnh không tràn */
    }

    .page-b52doithuong .hero-image {
      max-width: 100%;
      height: auto;
      display: block;
      margin: 0 auto; /* Đảm bảo ảnh nằm giữa */
      object-fit: contain; /* Giữ tỷ lệ gốc, không bị kéo giãn */
      background-color: transparent; /* Đảm bảo không có màu nền nếu ảnh có trong suốt */
    }

    .page-b52doithuong .hero-content {
      position: relative;
      z-index: 2;
      padding: 30px 15px;
      background: linear-gradient(to top, var(--page-b52doithuong-bg-dark) 0%, transparent 100%);
      color: var(--page-b52doithuong-text-light);
    }

    .page-b52doithuong .hero-content h1 {
      font-size: 2.5em;
      color: var(--page-b52doithuong-primary-color);
      margin-bottom: 15px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-b52doithuong .hero-content p {
      font-size: 1.2em;
      margin-bottom: 25px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Nút đăng nhập nổi */
    .page-b52doithuong .floating-login-btn {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      background-color: var(--page-b52doithuong-accent-color);
      color: var(--page-b52doithuong-text-light);
      padding: 15px 30px;
      border-radius: 50px;
      font-size: 1.3em;
      font-weight: bold;
      text-decoration: none;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
      z-index: 1000;
      transition: all 0.3s ease;
      animation: page-b52doithuong-pulse 2s infinite;
      border: 2px solid var(--page-b52doithuong-primary-color);
      white-space: nowrap;
    }

    .page-b52doithuong .floating-login-btn:hover {
      background-color: #c0392b; /* Đỏ sẫm hơn */
      transform: translateX(-50%) scale(1.05);
    }

    @keyframes page-b52doithuong-pulse {
      0% { transform: translateX(-50%) scale(1); }
      50% { transform: translateX(-50%) scale(1.03); }
      100% { transform: translateX(-50%) scale(1); }
    }

    /* Các phần nội dung */
    .page-b52doithuong section {
      padding: 40px 0;
      background-color: var(--page-b52doithuong-bg-light);
      margin-bottom: 20px;
      border-bottom: 1px solid var(--page-b52doithuong-border-color);
    }

    .page-b52doithuong section:nth-of-type(even) {
      background-color: #f8f9fa; /* Nền xen kẽ */
    }

    .page-b52doithuong h2 {
      text-align: center;
      font-size: 2em;
      color: var(--page-b52doithuong-secondary-color);
      margin-bottom: 30px;
      position: relative;
    }

    .page-b52doithuong h2::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: -10px;
      transform: translateX(-50%);
      width: 60px;
      height: 4px;
      background-color: var(--page-b52doithuong-primary-color);
      border-radius: 2px;
    }

    .page-b52doithuong h3 {
      font-size: 1.5em;
      color: var(--page-b52doithuong-primary-color);
      margin-top: 25px;
      margin-bottom: 15px;
    }

    .page-b52doithuong p {
      margin-bottom: 15px;
      color: var(--page-b52doithuong-text-dark);
    }

    .page-b52doithuong ul {
      list-style: disc;
      margin-left: 20px;
      margin-bottom: 15px;
      color: var(--page-b52doithuong-text-dark);
    }
    .page-b52doithuong ul li {
        margin-bottom: 8px;
    }

    /* Lưới sản phẩm/game */
    .page-b52doithuong .game-grid,
    .page-b52doithuong .provider-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }

    .page-b52doithuong .game-card,
    .page-b52doithuong .provider-logo {
      background-color: var(--page-b52doithuong-bg-dark);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: center;
      padding: 15px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      min-height: 150px;
    }

    .page-b52doithuong .game-card:hover,
    .page-b52doithuong .provider-logo:hover {
      transform: translateY(-5px) scale(1.02);
      box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
    }

    .page-b52doithuong .game-card img,
    .page-b52doithuong .provider-logo img {
      max-width: 100%;
      height: auto;
      max-height: 100px; /* Giới hạn chiều cao cho logo */
      object-fit: contain;
      border-radius: 5px;
      margin-bottom: 10px;
    }

    .page-b52doithuong .game-card h4,
    .page-b52doithuong .provider-logo h4 {
        font-size: 1.1em;
        color: var(--page-b52doithuong-primary-color);
        margin: 0;
        font-weight: bold;
    }

    .page-b52doithuong .game-card a,
    .page-b52doithuong .provider-logo a {
        text-decoration: none;
        color: inherit;
        display: block;
        width: 100%;
    }

    .page-b52doithuong .game-card a h4:hover {
        color: var(--page-b52doithuong-accent-color);
    }

    /* Các nút chung */
    .page-b52doithuong .btn {
      display: inline-block;
      background-color: var(--page-b52doithuong-primary-color);
      color: var(--page-b52doithuong-text-dark);
      padding: 10px 20px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease;
      margin-top: 20px;
    }

    .page-b52doithuong .btn:hover {
      background-color: #d89e24; /* Vàng cam đậm hơn */
    }

    .page-b52doithuong .text-center {
      text-align: center;
    }

    /* Responsive */
    @media (max-width: 768px) {
      .page-b52doithuong .hero-content h1 {
        font-size: 2em;
      }
      .page-b52doithuong .hero-content p {
        font-size: 1em;
      }
      .page-b52doithuong h2 {
        font-size: 1.8em;
      }
      .page-b52doithuong .game-grid,
      .page-b52doithuong .provider-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 15px;
      }
      .page-b52doithuong .game-card,
      .page-b52doithuong .provider-logo {
        min-height: 120px;
        padding: 10px;
      }
      .page-b52doithuong .floating-login-btn {
        font-size: 1.1em;
        padding: 12px 25px;
        bottom: 15px;
      }
      .page-b52doithuong .hero-section {
        padding-top: 140px; /* Điều chỉnh vùng an toàn cho mobile */
      }
    }

    @media (max-width: 480px) {
      .page-b52doithuong .hero-content h1 {
        font-size: 1.8em;
      }
      .page-b52doithuong .hero-content p {
        font-size: 0.9em;
      }
      .page-b52doithuong h2 {
        font-size: 1.5em;
      }
      .page-b52doithuong .game-grid,
      .page-b52doithuong .provider-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
        gap: 10px;
      }
      .page-b52doithuong .floating-login-btn {
        font-size: 1em;
        padding: 10px 20px;
        bottom: 10px;
      }
    }