/* Tổng quan */
    .page-qh88 {
      font-family: 'Arial', sans-serif;
      background-color: #121212; /* Nền tối */
      color: #f0f0f0; /* Chữ sáng */
      line-height: 1.6;
      padding-bottom: 80px; /* Khoảng trống cho nút nổi */
    }
    .page-qh88 a {
      color: #87CEEB; /* Xanh da trời cho liên kết */
      text-decoration: none;
      transition: color 0.3s ease;
    }
    .page-qh88 a:hover {
      color: #FFEB3B; /* Vàng sáng khi di chuột */
    }
    .page-qh88 .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 1rem;
    }
    .page-qh88 h1, .page-qh88 h2, .page-qh88 h3 {
      color: #FFD700; /* Vàng gold cho tiêu đề */
      text-align: center;
      margin-bottom: 1.5rem;
      font-weight: bold;
    }
    .page-qh88 h1 {
      font-size: 2.5rem;
      margin-top: 1.5rem;
    }
    .page-qh88 h2 {
      font-size: 2rem;
      border-bottom: 2px solid #FFD700;
      padding-bottom: 0.5rem;
      display: inline-block;
      margin-left: auto;
      margin-right: auto;
    }
    .page-qh88 h3 {
      font-size: 1.5rem;
      color: #f0f0f0;
    }
    .page-qh88 section {
      padding: 2rem 0;
      margin-bottom: 1rem;
    }
    .page-qh88 p {
      margin-bottom: 1rem;
      text-align: justify;
    }

    /* Banner chính */
    .page-qh88 .hero-banner {
      position: relative;
      width: 100%;
      height: 250px; /* Chiều cao cố định cho mobile */
      overflow: hidden;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text-align: center;
      background-color: #0d0d0d;
    }
    .page-qh88 .hero-banner img {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      z-index: 1;
    }
    .page-qh88 .hero-content {
      position: relative;
      z-index: 2;
      background: rgba(0, 0, 0, 0.5);
      padding: 1rem;
      border-radius: 8px;
      max-width: 90%;
    }
    .page-qh88 .hero-content h1 {
      color: #FFD700;
      margin-bottom: 0.5rem;
      font-size: 1.8rem;
    }
    .page-qh88 .hero-content p {
      font-size: 1rem;
      margin-bottom: 1rem;
    }
    .page-qh88 .hero-cta {
      display: inline-block;
      background-color: #E53935; /* Nút CTA nổi bật */
      color: #fff;
      padding: 0.8rem 1.5rem;
      border-radius: 50px;
      font-weight: bold;
      text-transform: uppercase;
      font-size: 1.1rem;
      transition: background-color 0.3s ease, transform 0.2s ease;
    }
    .page-qh88 .hero-cta:hover {
      background-color: #FF5252;
      transform: translateY(-2px);
    }

    /* Nút đăng nhập nổi */
    .page-qh88 .floating-login-btn {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      background-color: #FFD700; /* Vàng gold */
      color: #121212;
      padding: 1rem 2rem;
      border-radius: 50px;
      font-weight: bold;
      font-size: 1.2rem;
      text-align: center;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
      z-index: 1000;
      animation: page-qh88-pulse 2s infinite;
      display: block; /* Mặc định hiển thị */
      width: 90%;
      max-width: 350px;
    }
    .page-qh88 .floating-login-btn:hover {
      background-color: #FFEB3B;
      transform: translateX(-50%) translateY(-2px);
      animation: none;
    }
    @keyframes page-qh88-pulse {
      0% { box-shadow: 0 0 0 0 rgba(255, 215, 0, 0.7); }
      70% { box-shadow: 0 0 0 15px rgba(255, 215, 0, 0); }
      100% { box-shadow: 0 0 0 0 rgba(255, 215, 0, 0); }
    }

    /* Các phần nội dung */
    .page-qh88 .section-intro p {
      text-align: center;
      font-size: 1.1rem;
      max-width: 800px;
      margin: 0 auto 2rem auto;
    }

    /* Lưới sản phẩm/game */
    .page-qh88 .game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 1rem;
      margin-top: 2rem;
    }
    .page-qh88 .game-card {
      background-color: #1e1e1e;
      border-radius: 10px;
      overflow: hidden;
      text-align: center;
      padding: 1rem;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
    .page-qh88 .game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 5px 20px rgba(0, 0, 0, 0.5);
    }
    .page-qh88 .game-card img {
      width: 100%;
      height: 100px; /* Chiều cao cố định cho hình ảnh */
      object-fit: contain; /* Giữ tỷ lệ và căn giữa */
      margin-bottom: 0.5rem;
      border-radius: 5px;
    }
    .page-qh88 .game-card h3 {
      font-size: 1.1rem;
      margin-top: 0.5rem;
      color: #f0f0f0;
      text-align: center;
    }
    .page-qh88 .game-card a {
      display: block;
      color: inherit;
    }

    /* Danh sách ưu điểm/hướng dẫn */
    .page-qh88 .feature-list, .page-qh88 .guide-steps {
      list-style: none;
      padding: 0;
      margin-top: 1.5rem;
    }
    .page-qh88 .feature-list li, .page-qh88 .guide-steps li {
      background-color: #1e1e1e;
      margin-bottom: 0.8rem;
      padding: 1rem 1.5rem;
      border-radius: 8px;
      display: flex;
      align-items: center;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    }
    .page-qh88 .feature-list li strong {
      color: #FFD700;
      margin-right: 0.5rem;
    }
    .page-qh88 .guide-steps li::before {
      content: counter(step-counter);
      counter-increment: step-counter;
      background-color: #FFD700;
      color: #121212;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      display: flex;
      justify-content: center;
      align-items: center;
      font-weight: bold;
      margin-right: 1rem;
      flex-shrink: 0;
    }
    .page-qh88 .guide-steps {
      counter-reset: step-counter;
    }

    /* FAQ */
    .page-qh88 .faq-item {
      background-color: #1e1e1e;
      margin-bottom: 1rem;
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    }
    .page-qh88 .faq-question {
      padding: 1rem 1.5rem;
      background-color: #2a2a2a;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: bold;
      transition: background-color 0.3s ease;
    }
    .page-qh88 .faq-question:hover {
      background-color: #3a3a3a;
    }
    .page-qh88 .faq-question span {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
    }
    .page-qh88 .faq-answer {
      padding: 0 1.5rem;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.5s ease-out, padding 0.5s ease-out;
    }
    .page-qh88 .faq-answer p {
      padding-bottom: 1rem;
      margin: 0;
      text-align: left;
    }
    .page-qh88 .faq-item.active .faq-answer {
      max-height: 200px; /* Tùy chỉnh chiều cao tối đa */
      padding-top: 1rem;
    }
    .page-qh88 .faq-item.active .faq-question span {
      transform: rotate(180deg);
    }

    /* Media Queries cho thiết bị lớn hơn */
    @media (min-width: 768px) {
      .page-qh88 .hero-banner {
        height: 400px;
      }
      .page-qh88 .hero-content h1 {
        font-size: 3.5rem;
      }
      .page-qh88 .hero-content p {
        font-size: 1.2rem;
      }
      .page-qh88 h1 {
        font-size: 3rem;
      }
      .page-qh88 h2 {
        font-size: 2.5rem;
      }
      .page-qh88 .game-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      }
      .page-qh88 .game-card img {
        height: 120px;
      }
      .page-qh88 .floating-login-btn {
        width: auto;
        padding: 1rem 3rem;
        font-size: 1.3rem;
      }
    }