:root {
      --page-tr88-primary-color: #e44d26; /* Cam đỏ */
      --page-tr88-secondary-color: #f7b100; /* Vàng cam */
      --page-tr88-accent-color: #4CAF50; /* Xanh lá cây */
      --page-tr88-dark-color: #2c3e50; /* Xanh đậm */
      --page-tr88-light-color: #ecf0f1; /* Xám nhạt */
      --page-tr88-text-color: #34495e; /* Xám xanh */
      --page-tr88-white: #ffffff;
      --page-tr88-border-radius: 8px;
      --page-tr88-shadow: rgba(0, 0, 0, 0.1);
    }

    .page-tr88 {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      line-height: 1.6;
      color: var(--page-tr88-text-color);
      background-color: var(--page-tr88-light-color);
      overflow-x: hidden;
    }

    .page-tr88__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
    }

    /* Hero Section */
    .page-tr88__hero-section {
      position: relative;
      background: linear-gradient(135deg, var(--page-tr88-primary-color), var(--page-tr88-secondary-color));
      color: var(--page-tr88-white);
      text-align: center;
      padding: 10px 20px 60px; /* Padding top for fixed header */
      overflow: hidden;
      border-bottom-left-radius: 20px;
      border-bottom-right-radius: 20px;
    }

    .page-tr88__hero-image {
      width: 100%;
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: var(--page-tr88-border-radius);
      margin-bottom: 20px;
      box-shadow: 0 8px 16px var(--page-tr88-shadow);
      object-fit: cover;
      min-height: 200px; /* Ensure minimum height */
    }

    .page-tr88__hero-content {
      position: relative;
      z-index: 1;
    }

    .page-tr88__hero-title {
      font-size: 2.5em;
      margin-bottom: 10px;
      line-height: 1.2;
      color: var(--page-tr88-white);
    }

    .page-tr88__hero-subtitle {
      font-size: 1.2em;
      margin-bottom: 30px;
      opacity: 0.9;
    }

    .page-tr88__button {
      display: inline-block;
      background-color: var(--page-tr88-accent-color);
      color: var(--page-tr88-white);
      padding: 15px 30px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.3s ease;
      border: none;
      cursor: pointer;
      font-size: 1em;
      box-shadow: 0 4px 8px var(--page-tr88-shadow);
    }

    .page-tr88__button:hover {
      background-color: #45a049;
      transform: translateY(-2px);
    }

    /* Floating Promotion Button */
    .page-tr88__floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      z-index: 1000;
      background-color: var(--page-tr88-primary-color);
      color: var(--page-tr88-white);
      padding: 12px 20px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
      transition: background-color 0.3s ease, transform 0.3s ease;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .page-tr88__floating-button:hover {
      background-color: #c73a1a;
      transform: translateY(-3px);
    }

    .page-tr88__floating-button-icon {
      font-size: 1.2em;
    }

    /* Section Styling */
    .page-tr88__section {
      padding: 40px 20px;
      background-color: var(--page-tr88-white);
      margin-bottom: 20px;
      border-radius: var(--page-tr88-border-radius);
      box-shadow: 0 4px 8px var(--page-tr88-shadow);
    }

    .page-tr88__section--alt {
      background-color: var(--page-tr88-light-color);
    }

    .page-tr88__section-title {
      font-size: 2em;
      color: var(--page-tr88-dark-color);
      text-align: center;
      margin-bottom: 30px;
      position: relative;
    }

    .page-tr88__section-title::after {
      content: '';
      display: block;
      width: 60px;
      height: 4px;
      background-color: var(--page-tr88-primary-color);
      margin: 10px auto 0;
      border-radius: 2px;
    }

    .page-tr88__text-content {
      font-size: 1.1em;
      margin-bottom: 20px;
      text-align: justify;
    }

    /* Game Categories */
    .page-tr88__game-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-tr88__game-card {
      background-color: var(--page-tr88-white);
      border-radius: var(--page-tr88-border-radius);
      overflow: hidden;
      box-shadow: 0 6px 12px var(--page-tr88-shadow);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: center;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .page-tr88__game-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
    }

    .page-tr88__game-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
    }

    .page-tr88__game-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-tr88__game-title {
      font-size: 1.5em;
      color: var(--page-tr88-primary-color);
      margin-bottom: 10px;
    }

    .page-tr88__game-description {
      font-size: 0.95em;
      color: var(--page-tr88-text-color);
      margin-bottom: 15px;
      flex-grow: 1;
    }

    /* Guides/Promotions */
    .page-tr88__guide-list,
    .page-tr88__promo-list {
      display: flex;
      flex-direction: column;
      gap: 15px;
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .page-tr88__guide-item,
    .page-tr88__promo-item {
      background-color: var(--page-tr88-white);
      padding: 20px;
      border-radius: var(--page-tr88-border-radius);
      box-shadow: 0 2px 4px var(--page-tr88-shadow);
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .page-tr88__guide-icon,
    .page-tr88__promo-icon {
      font-size: 2em;
      color: var(--page-tr88-secondary-color);
      min-width: 40px;
      text-align: center;
    }

    .page-tr88__guide-text h3,
    .page-tr88__promo-text h3 {
      font-size: 1.3em;
      color: var(--page-tr88-dark-color);
      margin-top: 0;
      margin-bottom: 5px;
    }

    .page-tr88__guide-text p,
    .page-tr88__promo-text p {
      margin: 0;
      font-size: 0.95em;
    }

    /* FAQ Section */
    .page-tr88__faq-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .page-tr88__faq-item {
      background-color: var(--page-tr88-white);
      border: 1px solid #ddd;
      border-radius: var(--page-tr88-border-radius);
      margin-bottom: 10px;
      overflow: hidden;
      box-sizing: border-box; /* Ensure padding and border are included in width */
    }

    .page-tr88__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      background-color: var(--page-tr88-primary-color);
      color: var(--page-tr88-white);
      cursor: pointer;
      font-weight: bold;
      transition: background-color 0.3s ease;
      user-select: none;
    }

    .page-tr88__faq-question:hover {
      background-color: #c73a1a;
    }

    .page-tr88__faq-question h3 {
      margin: 0;
      font-size: 1.1em;
      pointer-events: none; /* Prevent h3 from blocking click event */
    }

    .page-tr88__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle icon from blocking click event */
    }

    .page-tr88__faq-item.active .page-tr88__faq-toggle {
      transform: rotate(45deg); /* Change + to X or similar */
    }
    .page-tr88__faq-item.active .page-tr88__faq-toggle::before {
        content: "−"; /* Change + to - */
    }
    .page-tr88__faq-item:not(.active) .page-tr88__faq-toggle::before {
        content: "+"; /* Keep + when not active */
    }


    .page-tr88__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 15px; /* Adjust padding for closed state */
      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-tr88-white);
      color: var(--page-tr88-text-color);
      box-sizing: border-box;
    }

    .page-tr88__faq-item.active .page-tr88__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to show content */
      padding: 20px 15px !important; /* Adjust padding for open state */
      opacity: 1;
    }

    .page-tr88__faq-answer p {
      margin: 0;
      font-size: 0.95em;
    }

    /* Why Choose Us */
    .page-tr88__advantage-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
    }

    .page-tr88__advantage-card {
      background-color: var(--page-tr88-white);
      padding: 30px;
      border-radius: var(--page-tr88-border-radius);
      box-shadow: 0 4px 8px var(--page-tr88-shadow);
      text-align: center;
      transition: transform 0.3s ease;
    }

    .page-tr88__advantage-card:hover {
      transform: translateY(-5px);
    }

    .page-tr88__advantage-icon {
      font-size: 3em;
      color: var(--page-tr88-secondary-color);
      margin-bottom: 15px;
    }

    .page-tr88__advantage-title {
      font-size: 1.4em;
      color: var(--page-tr88-dark-color);
      margin-bottom: 10px;
    }

    .page-tr88__advantage-description {
      font-size: 0.95em;
      color: var(--page-tr88-text-color);
    }

    /* Call to Action */
    .page-tr88__cta-section {
      text-align: center;
      background-color: var(--page-tr88-primary-color);
      color: var(--page-tr88-white);
      padding: 50px 20px;
      border-radius: var(--page-tr88-border-radius);
      margin-bottom: 20px;
    }

    .page-tr88__cta-title {
      font-size: 2.2em;
      margin-bottom: 15px;
    }

    .page-tr88__cta-text {
      font-size: 1.2em;
      margin-bottom: 30px;
      opacity: 0.9;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-tr88__hero-section {
        padding: 10px 15px 40px; /* Adjusted padding for mobile */
      }
      .page-tr88__hero-title {
        font-size: 2em;
      }
      .page-tr88__hero-subtitle {
        font-size: 1em;
      }
      .page-tr88__button {
        padding: 12px 25px;
        font-size: 0.9em;
      }
      .page-tr88__section {
        padding: 30px 15px;
      }
      .page-tr88__section-title {
        font-size: 1.8em;
      }
      .page-tr88__text-content {
        font-size: 1em;
      }
      .page-tr88__game-grid,
      .page-tr88__advantage-grid {
        grid-template-columns: 1fr;
        gap: 20px;
      }
      .page-tr88__game-card,
      .page-tr88__advantage-card {
        margin-left: 0 !important;
        margin-right: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
      }

      /* List items responsive */
      .page-tr88__guide-list,
      .page-tr88__promo-list,
      .page-tr88__faq-list {
          width: 100% !important;
          max-width: 100% !important;
          padding: 0 !important;
          margin-left: 0 !important;
          margin-right: 0 !important;
          box-sizing: border-box !important;
      }
      .page-tr88__guide-item,
      .page-tr88__promo-item,
      .page-tr88__faq-item {
          width: 100% !important;
          max-width: 100% !important;
          box-sizing: border-box !important;
          margin-left: 0 !important;
          margin-right: 0 !important;
          padding-left: 15px; /* Adjust padding to fit */
          padding-right: 15px; /* Adjust padding to fit */
          word-wrap: break-word !important;
          overflow-wrap: break-word !important;
          word-break: break-word !important;
      }
      .page-tr88__faq-question {
          padding: 12px 15px;
      }
      .page-tr88__faq-question h3 {
          font-size: 1em;
      }
      .page-tr88__faq-answer {
          padding: 15px 15px !important;
      }
      .page-tr88__faq-answer p {
          word-wrap: break-word !important;
          overflow-wrap: break-word !important;
          word-break: break-word !important;
      }

      .page-tr88__cta-title {
        font-size: 1.8em;
      }
      .page-tr88__cta-text {
        font-size: 1em;
      }
      .page-tr88__floating-button {
        padding: 10px 15px;
        font-size: 0.9em;
      }
      .page-tr88__hero-image,
      .page-tr88__game-image {
        max-width: 100%;
        height: auto;
      }
    }

    @media (max-width: 480px) {
      .page-tr88__hero-title {
        font-size: 1.8em;
      }
      .page-tr88__section-title {
        font-size: 1.6em;
      }
      .page-tr88__cta-title {
        font-size: 1.6em;
      }
    }