:root {
      --page-123b-primary-color: #e44d26; /* Màu cam đỏ năng động */
      --page-123b-secondary-color: #333; /* Xám đậm cho văn bản */
      --page-123b-accent-color: #f7b731; /* Vàng kim cho điểm nhấn */
      --page-123b-background-light: #f5f5f5; /* Nền xám nhạt */
      --page-123b-background-dark: #222; /* Nền tối cho các phần tương phản */
      --page-123b-text-light: #fff; /* Văn bản trắng cho nền tối */
      --page-123b-text-dark: #333; /* Văn bản tối cho nền sáng */
      --page-123b-border-radius: 8px;
      --page-123b-transition-speed: 0.3s ease;
    }

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

    .page-123b__section {
      padding: 40px 20px;
      margin: 0 auto;
      max-width: 1200px;
      text-align: center;
    }

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

    .page-123b__hero-section {
      background-color: var(--page-123b-background-dark);
      color: var(--page-123b-text-light);
      padding-top: 10px; /* Khoảng cách cho header cố định */
      padding-bottom: 50px;
      position: relative;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
    }

    .page-123b__hero-image-container {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      margin-bottom: 20px;
    }

    .page-123b__hero-image {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
      border-radius: var(--page-123b-border-radius);
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    }

    .page-123b__hero-content {
      position: relative;
      z-index: 1;
      max-width: 800px;
      padding: 0 15px;
    }

    .page-123b__hero-title {
      font-size: 2.8em;
      margin-bottom: 15px;
      color: var(--page-123b-accent-color);
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    }

    .page-123b__hero-description {
      font-size: 1.2em;
      margin-bottom: 30px;
      opacity: 0.9;
    }

    .page-123b__button {
      display: inline-block;
      background-color: var(--page-123b-primary-color);
      color: var(--page-123b-text-light);
      padding: 15px 30px;
      border-radius: var(--page-123b-border-radius);
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color var(--page-123b-transition-speed), transform var(--page-123b-transition-speed);
      cursor: pointer;
      border: none;
    }

    .page-123b__button:hover {
      background-color: #ff6f40; /* Màu cam đỏ nhạt hơn */
      transform: translateY(-3px);
    }

    .page-123b__floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--page-123b-primary-color);
      color: var(--page-123b-text-light);
      padding: 12px 20px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1em;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
      z-index: 1000;
      transition: transform var(--page-123b-transition-speed);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      border: none;
    }

    .page-123b__floating-button:hover {
      background-color: #ff6f40;
      transform: scale(1.05);
    }

    .page-123b__heading {
      font-size: 2.2em;
      color: var(--page-123b-primary-color);
      margin-bottom: 20px;
      position: relative;
      padding-bottom: 10px;
    }

    .page-123b__heading::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 0;
      transform: translateX(-50%);
      width: 60px;
      height: 3px;
      background-color: var(--page-123b-accent-color);
      border-radius: 2px;
    }

    .page-123b__text-content {
      font-size: 1.1em;
      margin-bottom: 20px;
      text-align: left;
    }

    .page-123b__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-123b__game-card {
      background-color: var(--page-123b-text-light);
      border-radius: var(--page-123b-border-radius);
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
      overflow: hidden;
      text-align: center;
      transition: transform var(--page-123b-transition-speed), box-shadow var(--page-123b-transition-speed);
      display: flex;
      flex-direction: column;
    }

    .page-123b__game-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    }

    .page-123b__game-image-container {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
      height: 200px; /* Chiều cao cố định cho hình ảnh trò chơi */
    }

    .page-123b__game-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .page-123b__game-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-123b__game-title {
      font-size: 1.5em;
      color: var(--page-123b-primary-color);
      margin-bottom: 10px;
    }

    .page-123b__game-description {
      font-size: 0.95em;
      color: var(--page-123b-secondary-color);
      margin-bottom: 15px;
      text-align: left;
    }

    .page-123b__list {
      list-style: none;
      padding: 0;
      text-align: left;
      margin-bottom: 20px;
    }

    .page-123b__list-item {
      display: flex;
      align-items: flex-start;
      margin-bottom: 10px;
      font-size: 1.05em;
      color: var(--page-123b-secondary-color);
    }

    .page-123b__list-item::before {
      content: '✔';
      color: var(--page-123b-primary-color);
      margin-right: 10px;
      font-weight: bold;
      font-size: 1.2em;
      line-height: 1;
    }

    .page-123b__faq-section {
      background-color: var(--page-123b-background-light);
      padding: 60px 20px;
      text-align: center;
    }

    .page-123b__faq-container {
      max-width: 800px;
      margin: 0 auto;
      text-align: left;
    }

    .page-123b__faq-item {
      background-color: var(--page-123b-text-light);
      border: 1px solid #ddd;
      border-radius: var(--page-123b-border-radius);
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    }

    .page-123b__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      background-color: #f9f9f9;
      cursor: pointer;
      user-select: none;
      font-weight: bold;
      color: var(--page-123b-primary-color);
      font-size: 1.1em;
      transition: background-color var(--page-123b-transition-speed);
    }

    .page-123b__faq-question:hover {
      background-color: #f0f0f0;
    }

    .page-123b__faq-question h3 {
      margin: 0;
      font-size: 1.1em; /* Đảm bảo h3 không quá lớn */
      pointer-events: none; /* Ngăn h3 chặn sự kiện click */
      flex-grow: 1;
    }

    .page-123b__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      margin-left: 10px;
      transition: transform var(--page-123b-transition-speed);
      pointer-events: none; /* Ngăn biểu tượng toggle chặn sự kiện click */
    }

    .page-123b__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 20px;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
      color: var(--page-123b-secondary-color);
    }

    .page-123b__faq-item.active .page-123b__faq-answer {
      max-height: 2000px !important; /* Đủ lớn để chứa nội dung */
      padding: 20px !important;
      opacity: 1;
    }

    .page-123b__faq-item.active .page-123b__faq-toggle {
      transform: rotate(45deg); /* Dấu cộng xoay thành dấu trừ */
    }

    .page-123b__cta-section {
      background-color: var(--page-123b-primary-color);
      color: var(--page-123b-text-light);
      padding: 50px 20px;
      text-align: center;
    }

    .page-123b__cta-title {
      font-size: 2.5em;
      margin-bottom: 20px;
      color: var(--page-123b-accent-color);
    }

    .page-123b__cta-description {
      font-size: 1.2em;
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Điều chỉnh responsive */
    @media (max-width: 768px) {
      .page-123b__hero-section {
        padding-top: 10px !important; /* Đảm bảo khoảng cách cho hero trên mobile */
        padding-bottom: 30px;
      }
      .page-123b__hero-title {
        font-size: 2em;
      }
      .page-123b__hero-description {
        font-size: 1em;
      }
      .page-123b__heading {
        font-size: 1.8em;
      }
      .page-123b__section {
        padding: 30px 15px;
      }
      .page-123b__game-grid {
        grid-template-columns: 1fr;
      }
      .page-123b__game-title {
        font-size: 1.3em;
      }
      .page-123b__game-description {
        font-size: 0.9em;
      }
      .page-123b__list-item {
        font-size: 0.95em;
      }
      .page-123b__floating-button {
        bottom: 15px;
        right: 15px;
        padding: 10px 18px;
        font-size: 0.9em;
      }
      .page-123b__cta-title {
        font-size: 2em;
      }
      .page-123b__cta-description {
        font-size: 1em;
      }
      .page-123b__faq-question {
        padding: 12px 15px;
        font-size: 1em;
      }
      .page-123b__faq-question h3 {
        font-size: 1em;
      }
      .page-123b__faq-answer {
        padding: 0 15px;
      }
      .page-123b__faq-item.active .page-123b__faq-answer {
        padding: 15px !important;
      }
      /* Tối ưu hóa hình ảnh responsive */
      .page-123b__hero-image,
      .page-123b__game-image {
        max-width: 100% !important;
        height: auto !important;
      }
      .page-123b__hero-image-container,
      .page-123b__game-image-container {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
    }

    @media (max-width: 480px) {
      .page-123b__hero-title {
        font-size: 1.8em;
      }
      .page-123b__hero-description {
        font-size: 0.9em;
      }
      .page-123b__button {
        padding: 12px 25px;
        font-size: 1em;
      }
      .page-123b__heading {
        font-size: 1.6em;
      }
    }