:root {
      --page-28dt-primary-color: #f39c12; /* Màu cam nổi bật */
      --page-28dt-secondary-color: #e67e22; /* Màu cam đậm hơn */
      --page-28dt-dark-background: #1a1a1a;
      --page-28dt-light-background: #2c3e50;
      --page-28dt-text-color: #ecf0f1;
      --page-28dt-accent-color: #3498db; /* Xanh dương */
      --page-28dt-border-color: #34495e;
      --page-28dt-button-text-color: #ffffff;
      --header-offset: 122px; /* Fallback value if not set by shared.css */
    }

    body {
      font-family: 'Arial', sans-serif;
      background-color: var(--page-28dt-dark-background);
      color: var(--page-28dt-text-color);
      line-height: 1.6;
      margin: 0;
      padding-top: var(--header-offset); /* Ensure content is below fixed header */
      box-sizing: border-box;
    }

    .page-28dt {
      max-width: 1200px;
      margin: 0 auto;
      padding: 10px 15px 60px 15px; /* Add padding for floating buttons */
      box-sizing: border-box;
      overflow-x: hidden;
    }

    .page-28dt__hero-section {
      background: linear-gradient(135deg, var(--page-28dt-dark-background), var(--page-28dt-light-background));
      padding: 60px 20px;
      text-align: center;
      border-radius: 10px;
      margin-bottom: 30px;
      position: relative;
      overflow: hidden;
      padding-top: 70px; /* Adjust for hero section specific top padding */
    }

    .page-28dt__hero-background-image {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.3;
      z-index: 0;
    }

    .page-28dt__hero-content {
      position: relative;
      z-index: 1;
    }

    .page-28dt__hero-title {
      font-size: 2.8em;
      color: var(--page-28dt-primary-color);
      margin-bottom: 15px;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
      font-weight: bold;
    }

    .page-28dt__hero-description {
      font-size: 1.2em;
      color: var(--page-28dt-text-color);
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-28dt__promo-button {
      display: inline-block;
      background-color: var(--page-28dt-primary-color);
      color: var(--page-28dt-button-text-color);
      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;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    }

    .page-28dt__promo-button:hover {
      background-color: var(--page-28dt-secondary-color);
      transform: translateY(-2px);
    }

    .page-28dt__floating-buttons {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      display: flex;
      gap: 15px;
      z-index: 1000;
      background-color: rgba(26, 26, 26, 0.9);
      padding: 10px 20px;
      border-radius: 30px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    }

    .page-28dt__reg-button,
    .page-28dt__login-button {
      background-color: var(--page-28dt-primary-color);
      color: var(--page-28dt-button-text-color);
      padding: 12px 25px;
      border-radius: 25px;
      border: none;
      font-weight: bold;
      cursor: pointer;
      font-size: 1em;
      transition: background-color 0.3s ease, transform 0.2s ease;
      white-space: nowrap;
    }

    .page-28dt__login-button {
      background-color: var(--page-28dt-accent-color);
    }

    .page-28dt__reg-button:hover,
    .page-28dt__login-button:hover {
      background-color: var(--page-28dt-secondary-color);
      transform: translateY(-2px);
    }

    .page-28dt__login-button:hover {
      background-color: #2980b9;
    }

    .page-28dt__section {
      background-color: var(--page-28dt-light-background);
      padding: 40px 20px;
      margin-bottom: 30px;
      border-radius: 10px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    }

    .page-28dt__section-title {
      font-size: 2em;
      color: var(--page-28dt-primary-color);
      text-align: center;
      margin-bottom: 30px;
      font-weight: bold;
      position: relative;
    }

    .page-28dt__section-title::after {
      content: '';
      display: block;
      width: 60px;
      height: 4px;
      background-color: var(--page-28dt-primary-color);
      margin: 10px auto 0;
      border-radius: 2px;
    }

    .page-28dt__text-content {
      font-size: 1.1em;
      margin-bottom: 20px;
      text-align: justify;
      color: var(--page-28dt-text-color);
    }

    .page-28dt__text-content strong {
      color: var(--page-28dt-primary-color);
    }

    .page-28dt__grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-28dt__grid-item {
      background-color: var(--page-28dt-dark-background);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-sizing: border-box;
    }

    .page-28dt__grid-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
    }

    .page-28dt__image-wrapper {
      width: 100%;
      height: 200px;
      overflow: hidden;
      display: flex;
      justify-content: center;
      align-items: center;
      background-color: #000;
    }

    .page-28dt__image {
      max-width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
      width: 100%;
      min-height: 200px; /* Ensure minimum size */
    }

    .page-28dt__grid-item-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
    }

    .page-28dt__grid-item-title {
      font-size: 1.4em;
      color: var(--page-28dt-primary-color);
      margin-bottom: 10px;
      font-weight: bold;
    }

    .page-28dt__grid-item-description {
      font-size: 0.95em;
      color: var(--page-28dt-text-color);
      line-height: 1.5;
    }

    .page-28dt__list {
      list-style: none;
      padding: 0;
      margin: 0;
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      justify-content: center;
    }

    .page-28dt__list-item {
      background-color: var(--page-28dt-dark-background);
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
      flex: 1 1 calc(33% - 20px);
      min-width: 280px;
      box-sizing: border-box;
      transition: transform 0.3s ease;
    }

    .page-28dt__list-item:hover {
      transform: translateY(-3px);
    }

    .page-28dt__list-item h3 {
      color: var(--page-28dt-primary-color);
      margin-top: 0;
      font-size: 1.3em;
      margin-bottom: 10px;
    }

    .page-28dt__list-item p {
      font-size: 1em;
      color: var(--page-28dt-text-color);
    }

    /* FAQ Section */
    .page-28dt__faq-section {
      background-color: var(--page-28dt-light-background);
      padding: 40px 20px;
      margin-bottom: 30px;
      border-radius: 10px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    }

    .page-28dt__faq-item {
      background-color: var(--page-28dt-dark-background);
      margin-bottom: 15px;
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    }

    .page-28dt__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      cursor: pointer;
      user-select: none;
      background-color: #34495e; /* slightly different background for questions */
      border-bottom: 1px solid var(--page-28dt-border-color);
      transition: background-color 0.3s ease;
    }

    .page-28dt__faq-question:hover {
      background-color: #46627f;
    }

    .page-28dt__faq-title {
      font-size: 1.2em;
      color: var(--page-28dt-primary-color);
      margin: 0;
      pointer-events: none; /* Prevent h3 from blocking click on parent div */
    }

    .page-28dt__faq-toggle {
      font-size: 1.8em;
      font-weight: bold;
      color: var(--page-28dt-primary-color);
      margin-left: 10px;
      pointer-events: none; /* Prevent span from blocking click on parent div */
      transition: transform 0.3s ease;
    }

    .page-28dt__faq-item.active .page-28dt__faq-toggle {
      transform: rotate(45deg); /* Change + to X or rotate to simulate - */
    }

    .page-28dt__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 20px;
      opacity: 0;
      color: var(--page-28dt-text-color);
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      box-sizing: border-box;
    }

    .page-28dt__faq-item.active .page-28dt__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to contain content */
      padding: 20px 20px !important;
      opacity: 1;
    }

    .page-28dt__faq-answer p {
      margin-top: 0;
      margin-bottom: 15px;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-28dt {
        padding: 10px 10px 80px 10px; /* More padding for floating buttons on smaller screens */
      }

      .page-28dt__hero-title {
        font-size: 2em;
      }

      .page-28dt__hero-description {
        font-size: 1em;
      }

      .page-28dt__promo-button {
        padding: 12px 25px;
        font-size: 1em;
      }

      .page-28dt__floating-buttons {
        bottom: 15px;
        gap: 10px;
        padding: 8px 15px;
      }

      .page-28dt__reg-button,
      .page-28dt__login-button {
        padding: 10px 20px;
        font-size: 0.9em;
      }

      .page-28dt__section {
        padding: 30px 15px;
      }

      .page-28dt__section-title {
        font-size: 1.8em;
      }

      .page-28dt__grid {
        grid-template-columns: 1fr;
      }

      .page-28dt__list-item {
        flex: 1 1 100%;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding: 15px !important; /* Adjusted padding for mobile */
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
      }
      
      .page-28dt__list {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        padding: 0 !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }

      .page-28dt__image {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }

      .page-28dt__image-wrapper {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }

      .page-28dt__faq-question {
        padding: 12px 15px;
      }

      .page-28dt__faq-title {
        font-size: 1.1em;
      }

      .page-28dt__faq-toggle {
        font-size: 1.5em;
      }

      .page-28dt__faq-answer {
        padding: 15px 15px;
      }

      .page-28dt__faq-item.active .page-28dt__faq-answer {
        padding: 15px 15px !important;
      }
    }

    @media (max-width: 480px) {
      .page-28dt__floating-buttons {
        gap: 8px;
        padding: 6px 10px;
        bottom: 10px;
      }
      .page-28dt__reg-button,
      .page-28dt__login-button {
        padding: 8px 15px;
        font-size: 0.85em;
      }
    }