/* Tổng quan */
    :root {
      --page-123b-primary-color: #e44d26; /* Màu cam đỏ */
      --page-123b-secondary-color: #333;
      --page-123b-accent-color: #f7b731; /* Màu vàng */
      --page-123b-background-dark: #1a1a1a;
      --page-123b-background-light: #2c2c2c;
      --page-123b-text-light: #f0f0f0;
      --page-123b-text-dark: #333;
      --page-123b-border-color: #444;
      --page-123b-border-radius: 8px;
      --page-123b-spacing-sm: 10px;
      --page-123b-spacing-md: 20px;
      --page-123b-spacing-lg: 30px;
    }

    .page-123b {
      font-family: 'Arial', sans-serif;
      color: var(--page-123b-text-light);
      background-color: var(--page-123b-background-dark);
      line-height: 1.6;
      overflow-x: hidden;
    }

    .page-123b__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: var(--page-123b-spacing-md);
    }

    /* Tiêu đề */
    .page-123b h1, .page-123b h2, .page-123b h3 {
      color: var(--page-123b-primary-color);
      margin-bottom: var(--page-123b-spacing-md);
      text-align: center;
    }

    .page-123b h1 {
      font-size: 2.5em;
      color: var(--page-123b-accent-color);
    }
    .page-123b h2 {
      font-size: 2em;
      color: var(--page-123b-primary-color);
    }
    .page-123b h3 {
      font-size: 1.5em;
      color: var(--page-123b-text-light);
    }

    /* Nút */
    .page-123b__button {
      display: inline-block;
      background-color: var(--page-123b-primary-color);
      color: #fff;
      padding: var(--page-123b-spacing-sm) var(--page-123b-spacing-md);
      border-radius: var(--page-123b-border-radius);
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
      font-size: 1em;
    }

    .page-123b__button:hover {
      background-color: #ff6633;
      transform: translateY(-2px);
    }

    /* Hình ảnh */
    .page-123b__image {
      max-width: 100%;
      height: auto;
      display: block;
      margin: 0 auto;
      border-radius: var(--page-123b-border-radius);
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
      object-fit: cover; /* Đảm bảo hình ảnh không bị biến dạng */
    }

    .page-123b__image-container {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      margin-bottom: var(--page-123b-spacing-md);
    }

    /* Phần Hero */
    .page-123b__hero-section {
      text-align: center;
      padding: 10px 0 var(--page-123b-spacing-lg); /* Padding top để tránh header cố định */
      background: linear-gradient(135deg, var(--page-123b-background-dark) 0%, #000 100%);
    }

    .page-123b__hero-section .page-123b__image-container {
      margin-bottom: var(--page-123b-spacing-md);
    }

    .page-123b__hero-section h1 {
      margin-top: var(--page-123b-spacing-md);
      margin-bottom: var(--page-123b-spacing-md);
      padding: 0 var(--page-123b-spacing-sm);
    }

    .page-123b__hero-button-group {
      display: flex;
      justify-content: center;
      gap: var(--page-123b-spacing-md);
      flex-wrap: wrap;
      margin-top: var(--page-123b-spacing-md);
    }

    /* Các phần nội dung */
    .page-123b__section {
      padding: var(--page-123b-spacing-lg) var(--page-123b-spacing-md);
      margin-bottom: var(--page-123b-spacing-md);
      background-color: var(--page-123b-background-light);
      border-radius: var(--page-123b-border-radius);
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    }

    .page-123b__section--dark {
      background-color: var(--page-123b-background-dark);
    }

    /* Lưới trò chơi */
    .page-123b__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: var(--page-123b-spacing-md);
      margin-top: var(--page-123b-spacing-md);
    }

    .page-123b__game-card {
      background-color: var(--page-123b-secondary-color);
      border-radius: var(--page-123b-border-radius);
      padding: var(--page-123b-spacing-sm);
      text-align: center;
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      text-decoration: none;
      color: var(--page-123b-text-light);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      align-items: center;
    }

    .page-123b__game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4);
    }

    .page-123b__game-card-image {
      max-width: 100%;
      height: auto;
      border-radius: var(--page-123b-border-radius);
      margin-bottom: var(--page-123b-spacing-sm);
      min-width: 200px; /* Minimum size for game images */
      min-height: 150px;
      object-fit: cover;
    }

    .page-123b__game-card-title {
      font-weight: bold;
      font-size: 1.1em;
      color: var(--page-123b-text-light);
    }

    /* Nhà cung cấp trò chơi */
    .page-123b__provider-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); /* Smaller for logos */
      gap: var(--page-123b-spacing-md);
      margin-top: var(--page-123b-spacing-md);
      justify-items: center;
    }

    .page-123b__provider-item {
      text-align: center;
      background-color: var(--page-123b-secondary-color);
      border-radius: var(--page-123b-border-radius);
      padding: var(--page-123b-spacing-sm);
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
      transition: transform 0.2s ease;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .page-123b__provider-item:hover {
      transform: translateY(-3px);
    }

    .page-123b__provider-logo {
      max-width: 100%;
      height: auto;
      max-height: 100px; /* Max height for logos */
      object-fit: contain;
      min-width: 100px; /* Minimum size for logos */
      min-height: 100px;
    }

    /* Các bước hướng dẫn */
    .page-123b__steps {
      display: flex;
      flex-direction: column;
      gap: var(--page-123b-spacing-md);
      margin-top: var(--page-123b-spacing-md);
    }

    .page-123b__step-item {
      background-color: var(--page-123b-secondary-color);
      padding: var(--page-123b-spacing-md);
      border-radius: var(--page-123b-border-radius);
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
      display: flex;
      align-items: flex-start;
      gap: var(--page-123b-spacing-md);
    }

    .page-123b__step-number {
      background-color: var(--page-123b-primary-color);
      color: #fff;
      border-radius: 50%;
      width: 30px;
      height: 30px;
      display: flex;
      justify-content: center;
      align-items: center;
      font-weight: bold;
      flex-shrink: 0;
    }

    .page-123b__step-content h3 {
      margin-top: 0;
      color: var(--page-123b-accent-color);
      text-align: left;
    }

    .page-123b__step-content p {
      margin-bottom: 0;
    }

    /* FAQ */
    .page-123b__faq-list {
      margin-top: var(--page-123b-spacing-md);
    }

    .page-123b__faq-item {
      background-color: var(--page-123b-secondary-color);
      border-radius: var(--page-123b-border-radius);
      margin-bottom: var(--page-123b-spacing-sm);
      overflow: hidden;
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    }

    .page-123b__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: var(--page-123b-spacing-md);
      cursor: pointer;
      user-select: none;
      background-color: #444;
      border-bottom: 1px solid var(--page-123b-border-color);
      transition: background-color 0.3s ease;
    }

    .page-123b__faq-question:hover {
      background-color: #555;
    }

    .page-123b__faq-question h3 {
      margin: 0;
      flex-grow: 1;
      color: var(--page-123b-text-light);
      text-align: left;
      pointer-events: none; /* Ngăn chặn sự kiện click trên h3 */
    }

    .page-123b__faq-toggle {
      font-size: 1.5em;
      font-weight: bold;
      color: var(--page-123b-accent-color);
      margin-left: var(--page-123b-spacing-sm);
      pointer-events: none; /* Ngăn chặn sự kiện click trên toggle */
    }

    .page-123b__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 var(--page-123b-spacing-md);
      opacity: 0;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      background-color: var(--page-123b-background-light);
      color: var(--page-123b-text-light);
    }

    .page-123b__faq-item.active .page-123b__faq-answer {
      max-height: 2000px !important; /* Đủ lớn để chứa nội dung */
      padding: var(--page-123b-spacing-md) !important;
      opacity: 1;
    }

    /* Nút đăng nhập nổi */
    .page-123b__floating-login-button {
      position: fixed;
      bottom: var(--page-123b-spacing-md);
      right: var(--page-123b-spacing-md);
      z-index: 1000;
      background-color: var(--page-123b-accent-color);
      color: var(--page-123b-background-dark);
      padding: var(--page-123b-spacing-sm) var(--page-123b-spacing-md);
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
      animation: page-123b__pulse 2s infinite;
      display: flex;
      align-items: center;
      gap: 5px;
    }

    .page-123b__floating-login-button:hover {
      background-color: #ffc857;
      transform: scale(1.05);
      animation: none;
    }

    @keyframes page-123b__pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.05); }
      100% { transform: scale(1); }
    }

    /* Danh sách không dấu đầu dòng */
    .page-123b ul {
      list-style-type: none;
      padding-left: 0;
    }

    .page-123b ul li {
      position: relative;
      padding-left: 25px;
      margin-bottom: 10px;
      color: var(--page-123b-text-light);
    }

    .page-123b ul li::before {
      content: '✔';
      color: var(--page-123b-accent-color);
      position: absolute;
      left: 0;
      top: 0;
      font-weight: bold;
    }

    /* Media Queries cho thiết bị di động */
    @media (max-width: 768px) {
      .page-123b__container {
        padding: var(--page-123b-spacing-sm);
      }

      .page-123b h1 {
        font-size: 2em;
      }
      .page-123b h2 {
        font-size: 1.7em;
      }
      .page-123b h3 {
        font-size: 1.3em;
      }

      .page-123b__hero-section {
        padding-top: 10px; /* Giữ nguyên padding-top cho di động */
      }

      .page-123b__hero-button-group {
        flex-direction: column;
        gap: var(--page-123b-spacing-sm);
      }

      .page-123b__button {
        width: 100%;
        text-align: center;
      }

      .page-123b__game-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
      }

      .page-123b__game-card-image {
        min-width: 150px; /* Adjust min-width for mobile */
        min-height: 100px;
      }

      .page-123b__provider-grid {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
      }

      .page-123b__provider-logo {
        min-width: 80px;
        min-height: 80px;
      }

      .page-123b__step-item {
        flex-direction: column;
        text-align: center;
        align-items: center;
      }

      .page-123b__step-content h3 {
        text-align: center;
      }

      .page-123b__faq-question {
        padding: var(--page-123b-spacing-sm);
      }

      .page-123b__faq-answer {
        padding: 0 var(--page-123b-spacing-sm);
      }

      .page-123b__faq-item.active .page-123b__faq-answer {
        padding: var(--page-123b-spacing-sm) !important;
      }

      /* Responsive image optimization */
      .page-123b img {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }
      .page-123b__image-container {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
    }