:root {
      --page-nuho90-primary: #007bff; /* Xanh dương */
      --page-nuho90-secondary: #6c757d; /* Xám */
      --page-nuho90-accent: #ffc107; /* Vàng */
      --page-nuho90-background-light: #f8f9fa; /* Trắng nhạt */
      --page-nuho90-text-dark: #212529; /* Đen đậm */
      --page-nuho90-text-light: #ffffff; /* Trắng */
      --page-nuho90-border-color: #dee2e6; /* Xám nhạt viền */
      --page-nuho90-success: #28a745; /* Xanh lá */
    }

    .page-nuho90-container {
      font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
      line-height: 1.6;
      color: var(--page-nuho90-text-dark);
      background-color: var(--page-nuho90-background-light);
      padding: 20px 0;
    }

    .page-nuho90-section {
      background-color: var(--page-nuho90-text-light);
      border-radius: 8px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
      margin: 20px auto;
      padding: 30px;
      max-width: 1200px;
    }
    
    .page-nuho90-section:first-of-type {
      padding-top: 50px;
    }

    .page-nuho90-hero {
      text-align: center;
      padding: 60px 20px;
      background: linear-gradient(135deg, var(--page-nuho90-primary) 0%, #0056b3 100%);
      color: var(--page-nuho90-text-light);
      border-radius: 0 0 15px 15px;
      margin-bottom: 30px;
    }

    .page-nuho90-hero h1 {
      font-size: 2.8em;
      margin-bottom: 15px;
      line-height: 1.2;
      color: var(--page-nuho90-text-light);
    }
    .page-nuho90-hero p {
      font-size: 1.2em;
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
      color: var(--page-nuho90-text-light);
    }

    .page-nuho90-btn {
      display: inline-block;
      background-color: var(--page-nuho90-accent);
      color: var(--page-nuho90-text-dark);
      padding: 15px 30px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
    }

    .page-nuho90-btn:hover {
      background-color: #e0a800;
      transform: translateY(-2px);
    }

    .page-nuho90-title {
      font-size: 2em;
      color: var(--page-nuho90-primary);
      margin-bottom: 25px;
      text-align: center;
      position: relative;
    }

    .page-nuho90-title::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: -10px;
      transform: translateX(-50%);
      width: 60px;
      height: 4px;
      background-color: var(--page-nuho90-accent);
      border-radius: 2px;
    }

    .page-nuho90-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-nuho90-card {
      background-color: var(--page-nuho90-background-light);
      border-radius: 10px;
      padding: 25px;
      text-align: center;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .page-nuho90-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
    }

    .page-nuho90-card img {
      max-width: 80px;
      height: auto;
      margin-bottom: 15px;
      border-radius: 5px;
    }

    .page-nuho90-card h3 {
      font-size: 1.4em;
      color: var(--page-nuho90-primary);
      margin-bottom: 10px;
    }

    .page-nuho90-card p {
      font-size: 0.95em;
      color: var(--page-nuho90-secondary);
      flex-grow: 1;
    }

    .page-nuho90-game-list {
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
      justify-content: center;
    }

    .page-nuho90-game-item {
      flex: 1 1 calc(33% - 20px); /* 3 items per row on desktop */
      min-width: 280px;
      background-color: var(--page-nuho90-text-light);
      border: 1px solid var(--page-nuho90-border-color);
      border-radius: 8px;
      overflow: hidden;
      transition: transform 0.2s ease;
    }
    .page-nuho90-game-item:hover {
      transform: translateY(-3px);
    }
    .page-nuho90-game-item img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }
    .page-nuho90-game-item-content {
      padding: 15px;
    }
    .page-nuho90-game-item h3 {
      font-size: 1.2em;
      margin-top: 0;
      margin-bottom: 10px;
      color: var(--page-nuho90-primary);
    }
    .page-nuho90-game-item p {
      font-size: 0.9em;
      color: var(--page-nuho90-secondary);
    }
    .page-nuho90-game-item .page-nuho90-btn-small {
      display: inline-block;
      background-color: var(--page-nuho90-primary);
      color: var(--page-nuho90-text-light);
      padding: 8px 15px;
      border-radius: 5px;
      text-decoration: none;
      font-size: 0.9em;
      margin-top: 15px;
      transition: background-color 0.3s ease;
    }
    .page-nuho90-game-item .page-nuho90-btn-small:hover {
      background-color: #0056b3;
    }

    .page-nuho90-promo {
      background-color: var(--page-nuho90-accent);
      color: var(--page-nuho90-text-dark);
      padding: 25px;
      border-radius: 10px;
      text-align: center;
      margin-top: 30px;
    }
    .page-nuho90-promo h2 {
      color: var(--page-nuho90-text-dark);
      margin-bottom: 15px;
      font-size: 1.8em;
    }
    .page-nuho90-promo p {
      font-size: 1.1em;
      margin-bottom: 20px;
    }
    .page-nuho90-promo .page-nuho90-btn {
      background-color: var(--page-nuho90-success);
      color: var(--page-nuho90-text-light);
    }
    .page-nuho90-promo .page-nuho90-btn:hover {
      background-color: #218838;
    }

    .page-nuho90-faq-item {
      margin-bottom: 15px;
      border: 1px solid var(--page-nuho90-border-color);
      border-radius: 8px;
      overflow: hidden;
    }

    .page-nuho90-faq-question {
      background-color: var(--page-nuho90-primary);
      color: var(--page-nuho90-text-light);
      padding: 15px 20px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease;
    }

    .page-nuho90-faq-question:hover {
      background-color: #0056b3;
    }

    .page-nuho90-faq-question .page-nuho90-icon {
      font-size: 1.2em;
      transition: transform 0.3s ease;
    }

    .page-nuho90-faq-answer {
      padding: 15px 20px;
      background-color: var(--page-nuho90-background-light);
      border-top: 1px solid var(--page-nuho90-border-color);
      display: none;
      font-size: 0.95em;
      color: var(--page-nuho90-text-dark);
    }

    .page-nuho90-faq-item.active .page-nuho90-faq-answer {
      display: block;
    }

    .page-nuho90-faq-item.active .page-nuho90-icon {
      transform: rotate(180deg);
    }

    .page-nuho90-cta-float {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--page-nuho90-success);
      color: var(--page-nuho90-text-light);
      padding: 15px 25px;
      border-radius: 50px;
      box-shadow: 0 4px 10px rgba(0,0,0,0.2);
      font-weight: bold;
      text-decoration: none;
      z-index: 1000;
      display: flex;
      align-items: center;
      gap: 10px;
      transition: transform 0.3s ease, background-color 0.3s ease;
      animation: page-nuho90-pulse 2s infinite;
    }

    .page-nuho90-cta-float:hover {
      background-color: #218838;
      transform: scale(1.05);
    }
    
    @keyframes page-nuho90-pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.03); }
      100% { transform: scale(1); }
    }

    @media (max-width: 768px) {
      .page-nuho90-hero h1 {
        font-size: 2em;
      }
      .page-nuho90-hero p {
        font-size: 1em;
      }
      .page-nuho90-title {
        font-size: 1.8em;
      }
      .page-nuho90-grid {
        grid-template-columns: 1fr;
      }
      .page-nuho90-game-item {
        flex: 1 1 100%;
      }
      .page-nuho90-section {
        margin: 15px;
        padding: 20px;
      }
      .page-nuho90-cta-float {
        bottom: 15px;
        right: 15px;
        padding: 12px 20px;
        font-size: 0.9em;
      }
    }