
    /* CSS cho trang Đăng ký 68GB */
    :root {
      --page-link68gb-primary-color: #0056b3; /* Xanh dương đậm */
      --page-link68gb-secondary-color: #007bff; /* Xanh dương */
      --page-link68gb-accent-color: #ffc107; /* Vàng */
      --page-link68gb-text-color: #333; /* Đen xám */
      --page-link68gb-bg-color: #f8f9fa; /* Trắng xám */
      --page-link68gb-border-color: #dee2e6; /* Xám nhạt */
      --page-link68gb-success-color: #28a745; /* Xanh lá */
    }

    .page-link68gb {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--page-link68gb-text-color);
      background-color: var(--page-link68gb-bg-color);
      padding: 20px 0;
    }

    .page-link68gb .page-link68gb-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 15px;
    }

    .page-link68gb h1, .page-link68gb h2, .page-link68gb h3 {
      color: var(--page-link68gb-primary-color);
      margin-bottom: 20px;
      font-weight: bold;
    }

    .page-link68gb h1 {
      font-size: 2.5em;
      text-align: center;
      margin-top: 20px;
      margin-bottom: 30px;
    }

    .page-link68gb h2 {
      font-size: 2em;
      border-bottom: 2px solid var(--page-link68gb-border-color);
      padding-bottom: 10px;
      margin-top: 40px;
    }

    .page-link68gb h3 {
      font-size: 1.5em;
      margin-top: 30px;
    }

    .page-link68gb p {
      margin-bottom: 15px;
    }

    .page-link68gb .page-link68gb-button {
      display: inline-block;
      background-color: var(--page-link68gb-success-color);
      color: #fff;
      padding: 12px 25px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.2s ease;
      margin-top: 20px;
      font-size: 1.1em;
      text-align: center;
      border: none;
      cursor: pointer;
    }

    .page-link68gb .page-link68gb-button:hover {
      background-color: #218838;
      transform: translateY(-2px);
    }

    .page-link68gb .page-link68gb-button-primary {
        background-color: var(--page-link68gb-primary-color);
    }
    .page-link68gb .page-link68gb-button-primary:hover {
        background-color: #004085;
    }

    .page-link68gb .page-link68gb-section {
      background-color: #fff;
      padding: 30px;
      border-radius: 10px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
      margin-bottom: 30px;
    }

    .page-link68gb .page-link68gb-steps ol {
      list-style-type: none;
      padding-left: 0;
    }

    .page-link68gb .page-link68gb-steps ol li {
      margin-bottom: 25px;
      padding-left: 40px;
      position: relative;
    }

    .page-link68gb .page-link68gb-steps ol li::before {
      content: counter(step-counter);
      counter-increment: step-counter;
      background-color: var(--page-link68gb-primary-color);
      color: #fff;
      border-radius: 50%;
      width: 30px;
      height: 30px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      position: absolute;
      left: 0;
      top: 0;
    }

    .page-link68gb .page-link68gb-steps ol li h3 {
      margin-top: 0;
      margin-bottom: 10px;
      color: var(--page-link68gb-secondary-color);
    }

    .page-link68gb .page-link68gb-image-wrapper {
      text-align: center;
      margin: 25px 0;
      border: 1px solid var(--page-link68gb-border-color);
      border-radius: 8px;
      overflow: hidden;
      max-width: 100%;
      height: auto;
    }

    .page-link68gb .page-link68gb-image-wrapper img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .page-link68gb .page-link68gb-list ul {
      list-style-type: disc;
      padding-left: 25px;
    }

    .page-link68gb .page-link68gb-list ul li {
      margin-bottom: 10px;
    }

    .page-link68gb .page-link68gb-faq .page-link68gb-faq-item {
      margin-bottom: 15px;
      border: 1px solid var(--page-link68gb-border-color);
      border-radius: 8px;
      overflow: hidden;
    }

    .page-link68gb .page-link68gb-faq .page-link68gb-faq-question {
      background-color: var(--page-link68gb-bg-color);
      padding: 15px 20px;
      cursor: pointer;
      font-weight: bold;
      color: var(--page-link68gb-primary-color);
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: background-color 0.3s ease;
    }

    .page-link68gb .page-link68gb-faq .page-link68gb-faq-question:hover {
      background-color: #e9ecef;
    }

    .page-link68gb .page-link68gb-faq .page-link68gb-faq-question .icon {
      font-size: 1.2em;
      transition: transform 0.3s ease;
    }

    .page-link68gb .page-link68gb-faq .page-link68gb-faq-answer {
      padding: 15px 20px;
      background-color: #fff;
      border-top: 1px solid var(--page-link68gb-border-color);
      display: none;
    }

    .page-link68gb .page-link68gb-faq .page-link68gb-faq-item.active .page-link68gb-faq-answer {
      display: block;
    }

    .page-link68gb .page-link68gb-faq .page-link68gb-faq-item.active .page-link68gb-faq-question .icon {
      transform: rotate(180deg);
    }

    .page-link68gb .page-link68gb-promotion-banner {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--page-link68gb-accent-color);
      color: var(--page-link68gb-text-color);
      padding: 15px 20px;
      border-radius: 10px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
      z-index: 1000;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      max-width: 250px;
    }

    .page-link68gb .page-link68gb-promotion-banner h3 {
      color: var(--page-link68gb-primary-color);
      margin-top: 0;
      margin-bottom: 10px;
      font-size: 1.2em;
    }

    .page-link68gb .page-link68gb-promotion-banner p {
      margin-bottom: 10px;
      font-size: 0.95em;
    }

    .page-link68gb .page-link68gb-promotion-banner .page-link68gb-close-button {
      position: absolute;
      top: 5px;
      right: 10px;
      background: none;
      border: none;
      font-size: 1.5em;
      color: var(--page-link68gb-text-color);
      cursor: pointer;
      line-height: 1;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-link68gb h1 {
        font-size: 2em;
      }
      .page-link68gb h2 {
        font-size: 1.7em;
      }
      .page-link68gb h3 {
        font-size: 1.3em;
      }
      .page-link68gb .page-link68gb-section {
        padding: 20px;
      }
      .page-link68gb .page-link68gb-button {
        padding: 10px 20px;
        font-size: 1em;
      }
      .page-link68gb .page-link68gb-promotion-banner {
        bottom: 10px;
        right: 10px;
        max-width: 180px;
        padding: 10px 15px;
      }
      .page-link68gb .page-link68gb-promotion-banner h3 {
        font-size: 1em;
      }
      .page-link68gb .page-link68gb-promotion-banner p {
        font-size: 0.85em;
      }
    }
  