/* Tổng quan và Reset */
    .page-qh88 {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: #e0e0e0; /* Màu chữ sáng */
      background-color: #1a1a1a; /* Nền tối */
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      overflow-x: hidden; /* Ngăn chặn cuộn ngang */
    }

    .page-qh88 a {
      color: #00BFFF; /* Màu xanh sáng cho liên kết */
      text-decoration: none;
      transition: color 0.3s ease;
    }

    .page-qh88 a:hover {
      color: #FFD700; /* Màu vàng khi hover */
    }

    .page-qh88 h1, .page-qh88 h2, .page-qh88 h3 {
      color: #FFD700; /* Màu vàng cho tiêu đề */
      text-align: center;
      margin-bottom: 20px;
    }

    .page-qh88 h1 {
      font-size: 2.2em;
      padding-top: 20px;
      padding-bottom: 10px;
      background-color: #2a2a2a;
      border-bottom: 3px solid #FFD700;
      margin-top: 0;
    }

    .page-qh88 h2 {
      font-size: 1.8em;
      margin-top: 30px;
      border-bottom: 2px solid #333;
      padding-bottom: 10px;
    }

    .page-qh88 h3 {
      font-size: 1.4em;
      margin-top: 25px;
    }

    .page-qh88 section {
      padding: 20px 15px;
      margin-bottom: 20px;
      background-color: #2a2a2a;
      border-radius: 8px;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    }

    .page-qh88 .container {
      max-width: 960px;
      margin: 0 auto;
      padding: 0 15px;
    }

    /* Nút Đăng ký/Đăng nhập nổi */
    .page-qh88 .page-floating-buttons {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      display: flex;
      gap: 15px;
      z-index: 1000;
    }

    .page-qh88 .page-floating-buttons .page-btn {
      background-color: #FFD700; /* Vàng */
      color: #1a1a1a; /* Chữ đen */
      padding: 12px 25px;
      border-radius: 30px;
      font-weight: bold;
      text-transform: uppercase;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
      transition: background-color 0.3s ease, transform 0.2s ease;
      font-size: 1em;
      border: none;
      cursor: pointer;
    }

    .page-qh88 .page-floating-buttons .page-btn:hover {
      background-color: #e0b800; /* Vàng đậm hơn khi hover */
      transform: translateY(-2px);
    }

    /* Phần giới thiệu */
    .page-qh88 .page-hero-section {
      text-align: center;
      padding: 40px 15px;
      background: linear-gradient(135deg, #1a1a1a, #333333);
      border-bottom: 5px solid #FFD700;
    }

    .page-qh88 .page-hero-section p {
      font-size: 1.1em;
      margin-bottom: 25px;
      color: #c0c0c0;
    }

    /* Sản phẩm/Trò chơi */
    .page-qh88 .page-product-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 30px;
      justify-items: center; /* Căn giữa các mục trong grid */
    }

    .page-qh88 .page-product-card {
      background-color: #333333;
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
      text-align: center;
      transition: transform 0.2s ease;
      width: 100%;
      max-width: 250px; /* Giới hạn chiều rộng cho card */
    }

    .page-qh88 .page-product-card:hover {
      transform: translateY(-5px);
    }

    .page-qh88 .page-product-card img {
      width: 100%;
      height: 120px;
      object-fit: cover;
      display: block;
    }

    .page-qh88 .page-product-card h3 {
      font-size: 1.1em;
      margin: 15px 10px;
      color: #FFD700;
    }

    .page-qh88 .page-product-card p {
      font-size: 0.9em;
      color: #b0b0b0;
      padding: 0 10px 15px;
      margin: 0;
    }

    /* Hướng dẫn */
    .page-qh88 .page-guide-steps {
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-top: 20px;
    }

    .page-qh88 .page-step-item {
      background-color: #333333;
      padding: 20px;
      border-radius: 8px;
      display: flex;
      align-items: flex-start;
      gap: 15px;
    }

    .page-qh88 .page-step-item .page-step-icon {
      flex-shrink: 0;
      width: 40px;
      height: 40px;
      background-color: #FFD700;
      color: #1a1a1a;
      border-radius: 50%;
      display: flex;
      justify-content: center;
      align-items: center;
      font-weight: bold;
      font-size: 1.2em;
    }

    .page-qh88 .page-step-item .page-step-content h3 {
      margin-top: 0;
      text-align: left;
      color: #FFD700;
    }

    .page-qh88 .page-step-item .page-step-content p {
      margin-bottom: 0;
      color: #c0c0c0;
    }

    /* CTA Section */
    .page-qh88 .page-cta-section {
      text-align: center;
      padding: 30px 15px;
      background-color: #1e1e1e;
      border-top: 3px solid #FFD700;
      margin-top: 40px;
    }

    .page-qh88 .page-cta-section .page-btn {
      background-color: #00BFFF;
      color: white;
      padding: 15px 30px;
      border-radius: 30px;
      font-weight: bold;
      text-transform: uppercase;
      font-size: 1.1em;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
      transition: background-color 0.3s ease, transform 0.2s ease;
      display: inline-block;
      margin-top: 20px;
      border: none;
      cursor: pointer;
    }

    .page-qh88 .page-cta-section .page-btn:hover {
      background-color: #009acd;
      transform: translateY(-2px);
    }

    /* Danh sách chung */
    .page-qh88 ul {
      list-style: none;
      padding: 0;
      margin: 20px 0;
    }

    .page-qh88 ul li {
      background-color: #333333;
      margin-bottom: 10px;
      padding: 12px 20px;
      border-radius: 5px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .page-qh88 ul li::before {
      content: '✔';
      color: #FFD700;
      font-weight: bold;
      font-size: 1.2em;
    }

    /* Responsive */
    @media (min-width: 768px) {
      .page-qh88 h1 {
        font-size: 2.8em;
      }

      .page-qh88 h2 {
        font-size: 2.2em;
      }

      .page-qh88 .page-product-grid {
        grid-template-columns: repeat(3, 1fr);
      }

      .page-qh88 .page-guide-steps {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
      }

      .page-qh88 .page-step-item {
        flex: 1 1 calc(50% - 20px); /* 2 items per row with gap */
        max-width: calc(50% - 20px);
      }

      .page-qh88 .page-floating-buttons {
        bottom: 30px;
        gap: 20px;
      }
      .page-qh88 .page-floating-buttons .page-btn {
        padding: 15px 30px;
        font-size: 1.1em;
      }
    }

    @media (min-width: 1024px) {
      .page-qh88 h1 {
        font-size: 3.2em;
      }

      .page-qh88 h2 {
        font-size: 2.5em;
      }

      .page-qh88 .page-product-grid {
        grid-template-columns: repeat(4, 1fr);
      }

      .page-qh88 .page-step-item {
        flex: 1 1 calc(33.333% - 20px); /* 3 items per row with gap */
        max-width: calc(33.333% - 20px);
      }
    }