:root {
      --page-tai68gb-primary-color: #007bff; /* Xanh dương */
      --page-tai68gb-secondary-color: #6c757d; /* Xám */
      --page-tai68gb-accent-color: #28a745; /* Xanh lá */
      --page-tai68gb-light-bg: #f8f9fa; /* Nền sáng */
      --page-tai68gb-dark-text: #212529; /* Chữ tối */
      --page-tai68gb-white-text: #ffffff; /* Chữ trắng */
      --page-tai68gb-border-color: #dee2e6; /* Màu viền */
      --page-tai68gb-shadow-color: rgba(0, 0, 0, 0.1); /* Màu đổ bóng */
    }

    .page-tai68gb {
      font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
      line-height: 1.6;
      color: var(--page-tai68gb-dark-text);
      background-color: var(--page-tai68gb-light-bg);
      padding: 20px 0;
    }

    .page-tai68gb__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 15px;
    }

    .page-tai68gb__hero {
      background: linear-gradient(135deg, var(--page-tai68gb-primary-color), #0056b3);
      color: var(--page-tai68gb-white-text);
      padding: 60px 20px;
      text-align: center;
      border-radius: 8px;
      margin-bottom: 40px;
      box-shadow: 0 4px 15px var(--page-tai68gb-shadow-color);
    }

    .page-tai68gb__hero h1 {
      font-size: 2.8em;
      margin-bottom: 15px;
      font-weight: bold;
    }

    .page-tai68gb__hero p {
      font-size: 1.2em;
      max-width: 800px;
      margin: 0 auto 30px;
    }

    .page-tai68gb__button {
      display: inline-block;
      background-color: var(--page-tai68gb-accent-color);
      color: var(--page-tai68gb-white-text);
      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;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    }

    .page-tai68gb__button:hover {
      background-color: #218838;
      transform: translateY(-2px);
    }

    .page-tai68gb__section {
      background-color: var(--page-tai68gb-white-text);
      padding: 40px;
      border-radius: 8px;
      box-shadow: 0 2px 10px var(--page-tai68gb-shadow-color);
      margin-bottom: 30px;
    }

    .page-tai68gb__section h2 {
      color: var(--page-tai68gb-primary-color);
      font-size: 2em;
      margin-bottom: 25px;
      text-align: center;
      position: relative;
    }

    .page-tai68gb__section h2::after {
      content: '';
      width: 60px;
      height: 4px;
      background-color: var(--page-tai68gb-accent-color);
      position: absolute;
      left: 50%;
      transform: translateX(-50%);
      bottom: -10px;
      border-radius: 2px;
    }

    .page-tai68gb__grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
      margin-top: 30px;
    }

    .page-tai68gb__card {
      background-color: var(--page-tai68gb-light-bg);
      border-radius: 8px;
      padding: 25px;
      text-align: center;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
      transition: transform 0.3s ease;
    }

    .page-tai68gb__card:hover {
      transform: translateY(-5px);
    }

    .page-tai68gb__card-icon {
      font-size: 3em;
      color: var(--page-tai68gb-primary-color);
      margin-bottom: 15px;
    }

    .page-tai68gb__card h3 {
      font-size: 1.5em;
      color: var(--page-tai68gb-primary-color);
      margin-bottom: 10px;
    }

    .page-tai68gb__card p {
      font-size: 0.95em;
      color: var(--page-tai68gb-secondary-color);
    }

    .page-tai68gb__download-steps {
      display: flex;
      flex-direction: column;
      gap: 30px;
    }

    .page-tai68gb__step {
      display: flex;
      align-items: center;
      gap: 25px;
      background-color: var(--page-tai68gb-light-bg);
      padding: 25px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    }

    .page-tai68gb__step-number {
      background-color: var(--page-tai68gb-primary-color);
      color: var(--page-tai68gb-white-text);
      width: 50px;
      height: 50px;
      min-width: 50px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5em;
      font-weight: bold;
    }

    .page-tai68gb__step-content h3 {
      color: var(--page-tai68gb-primary-color);
      margin-bottom: 10px;
      font-size: 1.4em;
    }

    .page-tai68gb__step-content p {
      font-size: 1em;
      color: var(--page-tai68gb-dark-text);
    }

    .page-tai68gb__qr-code-section {
      text-align: center;
      margin-top: 30px;
    }

    .page-tai68gb__qr-code-section h3 {
      color: var(--page-tai68gb-primary-color);
      margin-bottom: 20px;
      font-size: 1.6em;
    }

    .page-tai68gb__qr-codes {
      display: flex;
      justify-content: center;
      gap: 40px;
      flex-wrap: wrap;
    }

    .page-tai68gb__qr-item {
      text-align: center;
      background-color: var(--page-tai68gb-white-text);
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }

    .page-tai68gb__qr-item img {
      width: 180px;
      height: 180px;
      margin-bottom: 15px;
      border: 1px solid var(--page-tai68gb-border-color);
      border-radius: 4px;
    }

    .page-tai68gb__qr-item p {
      font-weight: bold;
      color: var(--page-tai68gb-dark-text);
      font-size: 1.1em;
    }

    .page-tai68gb__game-list {
      list-style: none;
      padding: 0;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 20px;
      text-align: center;
    }

    .page-tai68gb__game-list li {
      background-color: var(--page-tai68gb-light-bg);
      padding: 15px;
      border-radius: 6px;
      font-weight: bold;
      color: var(--page-tai68gb-dark-text);
      box-shadow: 0 1px 5px rgba(0, 0, 0, 0.05);
      transition: background-color 0.2s ease;
    }

    .page-tai68gb__game-list li:hover {
      background-color: var(--page-tai68gb-border-color);
    }

    .page-tai68gb__faq-item {
      margin-bottom: 20px;
      border-bottom: 1px solid var(--page-tai68gb-border-color);
      padding-bottom: 15px;
    }

    .page-tai68gb__faq-question {
      font-weight: bold;
      color: var(--page-tai68gb-primary-color);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1.1em;
    }

    .page-tai68gb__faq-question span {
      transition: transform 0.3s ease;
    }

    .page-tai68gb__faq-question.active span {
      transform: rotate(180deg);
    }

    .page-tai68gb__faq-answer {
      margin-top: 10px;
      color: var(--page-tai68gb-dark-text);
      display: none;
      font-size: 0.95em;
    }

    .page-tai68gb__cta-final {
      text-align: center;
      padding: 50px 20px;
      background-color: var(--page-tai68gb-primary-color);
      color: var(--page-tai68gb-white-text);
      border-radius: 8px;
      margin-top: 40px;
    }

    .page-tai68gb__cta-final h2 {
      color: var(--page-tai68gb-white-text);
      font-size: 2.5em;
      margin-bottom: 20px;
    }

    .page-tai68gb__cta-final p {
      font-size: 1.2em;
      margin-bottom: 30px;
    }

    /* Floating Ad Menu */
    .page-tai68gb__floating-ad {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: #ffc107; /* Màu vàng nổi bật */
      color: var(--page-tai68gb-dark-text);
      padding: 15px 20px;
      border-radius: 8px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
      text-align: center;
      z-index: 1000;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
      max-width: 250px;
    }

    .page-tai68gb__floating-ad h3 {
      margin: 0;
      font-size: 1.2em;
      color: var(--page-tai68gb-dark-text);
    }

    .page-tai68gb__floating-ad .page-tai68gb__button {
      background-color: var(--page-tai68gb-accent-color);
      padding: 10px 20px;
      font-size: 0.95em;
      box-shadow: none;
    }

    .page-tai68gb__floating-ad .page-tai68gb__button:hover {
      background-color: #218838;
      transform: none;
    }

    @media (max-width: 768px) {
      .page-tai68gb__hero h1 {
        font-size: 2em;
      }

      .page-tai68gb__hero p {
        font-size: 1em;
      }

      .page-tai68gb__section {
        padding: 25px;
      }

      .page-tai68gb__section h2 {
        font-size: 1.7em;
      }

      .page-tai68gb__grid {
        grid-template-columns: 1fr;
      }

      .page-tai68gb__step {
        flex-direction: column;
        text-align: center;
      }

      .page-tai68gb__step-number {
        margin-bottom: 15px;
      }

      .page-tai68gb__qr-codes {
        flex-direction: column;
        align-items: center;
      }

      .page-tai68gb__cta-final h2 {
        font-size: 2em;
      }

      .page-tai68gb__cta-final p {
        font-size: 1em;
      }

      .page-tai68gb__floating-ad {
        bottom: 15px;
        right: 15px;
        max-width: 200px;
        padding: 10px 15px;
      }

      .page-tai68gb__floating-ad h3 {
        font-size: 1em;
      }
    }