:root {
      --page-gameb52-primary-color: #ffcc00; /* Vàng rực rỡ */
      --page-gameb52-secondary-color: #007bff; /* Xanh dương */
      --page-gameb52-background-dark: #1a1a2e; /* Nền tối */
      --page-gameb52-text-light: #ffffff; /* Chữ sáng */
      --page-gameb52-text-dark: #333333; /* Chữ tối */
      --page-gameb52-accent-color: #e74c3c; /* Đỏ nhấn */
      --page-gameb52-card-bg: #2a2a4a; /* Nền thẻ */
      --page-gameb52-border-color: #3f3f6f; /* Màu viền */
    }

    .page-gameb52-container {
      font-family: 'Arial', sans-serif;
      color: var(--page-gameb52-text-light);
      background-color: var(--page-gameb52-background-dark);
      line-height: 1.6;
      overflow-x: hidden;
    }

    .page-gameb52-banner {
      position: relative;
      width: 100%;
      height: 250px; /* Tối ưu cho di động */
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text-align: center;
      background: var(--page-gameb52-background-dark); /* Fallback */
      overflow: hidden;
      padding: 20px;
      box-sizing: border-box;
    }

    .page-gameb52-banner-image {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.7;
      z-index: 1;
    }

    .page-gameb52-banner-content {
      position: relative;
      z-index: 2;
      padding: 0 15px;
    }

    .page-gameb52-banner h1 {
      font-size: 1.8em;
      color: var(--page-gameb52-primary-color);
      margin-bottom: 10px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-gameb52-banner p {
      font-size: 1em;
      color: var(--page-gameb52-text-light);
      margin-bottom: 20px;
      text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    }

    .page-gameb52-floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--page-gameb52-accent-color);
      color: var(--page-gameb52-text-light);
      padding: 12px 25px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
      z-index: 1000;
      transition: transform 0.3s ease, background-color 0.3s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      line-height: 1.2;
    }

    .page-gameb52-floating-button:hover {
      transform: translateY(-3px);
      background-color: #c0392b; /* Đỏ đậm hơn */
    }

    .page-gameb52-section {
      padding: 30px 15px;
      margin-bottom: 20px;
      background-color: var(--page-gameb52-background-dark);
      border-radius: 8px;
    }

    .page-gameb52-section h2 {
      color: var(--page-gameb52-primary-color);
      font-size: 1.6em;
      margin-bottom: 20px;
      text-align: center;
      border-bottom: 2px solid var(--page-gameb52-border-color);
      padding-bottom: 10px;
    }

    .page-gameb52-section h3 {
      color: var(--page-gameb52-secondary-color);
      font-size: 1.3em;
      margin-top: 25px;
      margin-bottom: 15px;
      text-align: center;
    }

    .page-gameb52-text-center {
      text-align: center;
    }

    .page-gameb52-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 20px;
    }

    .page-gameb52-card {
      background-color: var(--page-gameb52-card-bg);
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
      text-align: center;
      transition: transform 0.2s ease;
      border: 1px solid var(--page-gameb52-border-color);
    }

    .page-gameb52-card:hover {
      transform: translateY(-5px);
    }

    .page-gameb52-card img {
      width: 100%;
      height: 120px;
      object-fit: cover;
      display: block;
    }

    .page-gameb52-card-content {
      padding: 15px;
    }

    .page-gameb52-card h4 {
      font-size: 1.1em;
      color: var(--page-gameb52-primary-color);
      margin-bottom: 10px;
    }

    .page-gameb52-card p {
      font-size: 0.9em;
      color: var(--page-gameb52-text-light);
    }

    .page-gameb52-button {
      display: inline-block;
      background-color: var(--page-gameb52-secondary-color);
      color: var(--page-gameb52-text-light);
      padding: 10px 20px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      margin-top: 15px;
      transition: background-color 0.3s ease;
    }

    .page-gameb52-button:hover {
      background-color: #0056b3; /* Xanh đậm hơn */
    }

    .page-gameb52-list {
      list-style-type: none;
      padding: 0;
      margin: 20px 0;
    }

    .page-gameb52-list li {
      background-color: var(--page-gameb52-card-bg);
      margin-bottom: 10px;
      padding: 15px;
      border-radius: 5px;
      display: flex;
      align-items: center;
      border-left: 5px solid var(--page-gameb52-primary-color);
    }

    .page-gameb52-list li::before {
      content: "✅";
      margin-right: 10px;
      font-size: 1.2em;
    }

    .page-gameb52-download-buttons {
      display: flex;
      flex-direction: column;
      gap: 15px;
      margin-top: 20px;
    }

    .page-gameb52-download-buttons a {
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 15px;
      background-color: var(--page-gameb52-secondary-color);
      color: var(--page-gameb52-text-light);
      text-decoration: none;
      border-radius: 8px;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease;
    }

    .page-gameb52-download-buttons a:hover {
      background-color: #0056b3;
    }

    .page-gameb52-download-buttons a img {
      width: 24px;
      height: 24px;
      margin-right: 10px;
    }

    .page-gameb52-faq-item {
      background-color: var(--page-gameb52-card-bg);
      margin-bottom: 10px;
      border-radius: 8px;
      border: 1px solid var(--page-gameb52-border-color);
    }

    .page-gameb52-faq-question {
      padding: 15px;
      cursor: pointer;
      font-weight: bold;
      color: var(--page-gameb52-primary-color);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .page-gameb52-faq-question::after {
      content: '+';
      font-size: 1.2em;
      transition: transform 0.3s ease;
    }

    .page-gameb52-faq-question.active::after {
      content: '-';
      transform: rotate(180deg);
    }

    .page-gameb52-faq-answer {
      padding: 0 15px 15px;
      color: var(--page-gameb52-text-light);
      display: none;
      overflow: hidden;
    }

    .page-gameb52-highlight {
      color: var(--page-gameb52-primary-color);
      font-weight: bold;
    }

    @media (min-width: 768px) {
      .page-gameb52-banner {
        height: 350px;
      }
      .page-gameb52-banner h1 {
        font-size: 2.5em;
      }
      .page-gameb52-banner p {
        font-size: 1.2em;
      }
      .page-gameb52-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      }
      .page-gameb52-download-buttons {
        flex-direction: row;
        justify-content: center;
      }
      .page-gameb52-download-buttons a {
        max-width: 250px;
      }
    }

    @media (min-width: 1024px) {
      .page-gameb52-banner {
        height: 450px;
      }
      .page-gameb52-banner h1 {
        font-size: 3em;
      }
      .page-gameb52-section {
        padding: 50px;
        max-width: 1200px;
        margin-left: auto;
        margin-right: auto;
      }
      .page-gameb52-grid {
        grid-template-columns: repeat(4, 1fr);
      }
    }