:root {
      --page-xoso66comapp-primary-color: #e44d26; /* Cam đỏ */
      --page-xoso66comapp-secondary-color: #2c3e50; /* Xám xanh đậm */
      --page-xoso66comapp-accent-color: #f39c12; /* Vàng cam */
      --page-xoso66comapp-text-color: #ecf0f1; /* Trắng xám */
      --page-xoso66comapp-background-color: #1a1a1a; /* Đen nhạt */
      --page-xoso66comapp-light-text-color: #ffffff; /* Trắng */
      --page-xoso66comapp-dark-text-color: #333333; /* Xám đậm */
      --page-xoso66comapp-card-bg: #222222; /* Đen xám */
    }

    .page-xoso66comapp {
      font-family: 'Arial', sans-serif;
      color: var(--page-xoso66comapp-text-color);
      background-color: var(--page-xoso66comapp-background-color);
      line-height: 1.6;
      padding-bottom: 80px; /* Space for floating button */
    }

    .page-xoso66comapp-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 15px;
    }

    .page-xoso66comapp-hero {
      position: relative;
      background-color: #000;
      overflow: hidden;
      padding-top: 160px; /* Safe zone for floating menu */
      padding-bottom: 40px;
      text-align: center;
    }

    .page-xoso66comapp-hero-bg {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      z-index: 0;
      filter: brightness(0.6);
    }

    .page-xoso66comapp-hero-content {
      position: relative;
      z-index: 1;
      max-width: 800px;
      margin: 0 auto;
      color: var(--page-xoso66comapp-light-text-color);
    }

    .page-xoso66comapp-hero h1 {
      font-size: 2.2em;
      margin-bottom: 20px;
      color: var(--page-xoso66comapp-accent-color);
      line-height: 1.2;
    }

    .page-xoso66comapp-hero p {
      font-size: 1.1em;
      margin-bottom: 30px;
    }

    .page-xoso66comapp-download-buttons {
      display: flex;
      justify-content: center;
      gap: 20px;
      flex-wrap: wrap;
    }

    .page-xoso66comapp-download-buttons a {
      display: inline-block;
      background-color: var(--page-xoso66comapp-primary-color);
      color: var(--page-xoso66comapp-light-text-color);
      padding: 15px 30px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease;
      min-width: 180px;
    }

    .page-xoso66comapp-download-buttons a:hover {
      background-color: var(--page-xoso66comapp-accent-color);
    }

    .page-xoso66comapp-section {
      padding: 40px 0;
      text-align: center;
    }

    .page-xoso66comapp-section h2 {
      font-size: 2em;
      color: var(--page-xoso66comapp-primary-color);
      margin-bottom: 30px;
      position: relative;
      padding-bottom: 10px;
    }

    .page-xoso66comapp-section h2::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 60px;
      height: 3px;
      background-color: var(--page-xoso66comapp-accent-color);
    }

    .page-xoso66comapp-text-left {
      text-align: left;
    }

    .page-xoso66comapp-features-grid,
    .page-xoso66comapp-game-grid,
    .page-xoso66comapp-provider-grid,
    .page-xoso66comapp-payment-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-xoso66comapp-card {
      background-color: var(--page-xoso66comapp-card-bg);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease;
      text-align: center;
      padding-bottom: 20px;
    }

    .page-xoso66comapp-card:hover {
      transform: translateY(-5px);
    }

    .page-xoso66comapp-card-image {
      width: 100%;
      height: 180px;
      object-fit: cover;
      margin-bottom: 15px;
    }
    
    .page-xoso66comapp-card-gamelogo {
      width: 100%;
      height: 120px;
      object-fit: contain;
      padding: 15px;
      background-color: var(--page-xoso66comapp-light-text-color); /* White background for logos */
      border-bottom: 1px solid #eee;
    }

    .page-xoso66comapp-card h3 {
      font-size: 1.3em;
      color: var(--page-xoso66comapp-primary-color);
      margin-bottom: 10px;
      padding: 0 15px;
    }

    .page-xoso66comapp-card p {
      font-size: 0.95em;
      color: var(--page-xoso66comapp-text-color);
      padding: 0 15px;
    }
    
    .page-xoso66comapp-card h3 a {
      color: var(--page-xoso66comapp-primary-color);
      text-decoration: none;
    }

    .page-xoso66comapp-card h3 a:hover {
      color: var(--page-xoso66comapp-accent-color);
    }

    .page-xoso66comapp-floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--page-xoso66comapp-primary-color);
      color: var(--page-xoso66comapp-light-text-color);
      padding: 15px 25px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
      z-index: 1000;
      animation: page-xoso66comapp-pulse 2s infinite;
    }

    .page-xoso66comapp-floating-button:hover {
      background-color: var(--page-xoso66comapp-accent-color);
    }

    @keyframes page-xoso66comapp-pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.05); }
      100% { transform: scale(1); }
    }

    .page-xoso66comapp-faq-item {
      background-color: var(--page-xoso66comapp-card-bg);
      border-radius: 8px;
      margin-bottom: 15px;
      text-align: left;
      overflow: hidden;
    }

    .page-xoso66comapp-faq-question {
      padding: 15px 20px;
      cursor: pointer;
      font-weight: bold;
      color: var(--page-xoso66comapp-primary-color);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1.1em;
    }

    .page-xoso66comapp-faq-question::after {
      content: '+';
      font-size: 1.2em;
      transition: transform 0.3s ease;
    }

    .page-xoso66comapp-faq-question.active::after {
      content: '-';
      transform: rotate(180deg);
    }

    .page-xoso66comapp-faq-answer {
      padding: 0 20px 15px;
      color: var(--page-xoso66comapp-text-color);
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out, padding 0.3s ease-out;
    }
    
    .page-xoso66comapp-faq-answer.active {
      max-height: 200px; /* Adjust as needed */
      padding: 0 20px 20px;
    }

    .page-xoso66comapp-download-final {
      background-color: var(--page-xoso66comapp-secondary-color);
      padding: 50px 0;
    }
    
    .page-xoso66comapp-download-final h2 {
      color: var(--page-xoso66comapp-light-text-color);
    }

    @media (max-width: 768px) {
      .page-xoso66comapp-hero h1 {
        font-size: 1.8em;
      }

      .page-xoso66comapp-hero p {
        font-size: 1em;
      }

      .page-xoso66comapp-download-buttons a {
        padding: 12px 25px;
        font-size: 1em;
      }

      .page-xoso66comapp-section h2 {
        font-size: 1.7em;
      }
      
      .page-xoso66comapp-floating-button {
        padding: 12px 20px;
        font-size: 1em;
        bottom: 15px;
        right: 15px;
      }
    }

    @media (max-width: 480px) {
      .page-xoso66comapp-hero {
        padding-top: 140px; /* Smaller safe zone for very small screens */
      }
      .page-xoso66comapp-hero h1 {
        font-size: 1.5em;
      }
      .page-xoso66comapp-download-buttons {
        flex-direction: column;
        gap: 15px;
      }
      .page-xoso66comapp-download-buttons a {
        width: 80%;
        margin: 0 auto;
      }
      .page-xoso66comapp-features-grid,
      .page-xoso66comapp-game-grid,
      .page-xoso66comapp-provider-grid,
      .page-xoso66comapp-payment-grid {
        grid-template-columns: 1fr;
      }
    }