:root {
      --page-hu99-primary-color: #007bff;
      --page-hu99-secondary-color: #6c757d;
      --page-hu99-accent-color: #ffc107;
      --page-hu99-background-light: #f8f9fa;
      --page-hu99-background-dark: #343a40;
      --page-hu99-text-dark: #212529;
      --page-hu99-text-light: #ffffff;
      --page-hu99-border-color: #dee2e6;
    }

    .page-hu99 {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      line-height: 1.6;
      color: var(--page-hu99-text-dark);
      background-color: var(--page-hu99-background-light);
    }

    .page-hu99__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
    }

    @media (max-width: 768px) {
      .page-hu99__container {
        padding: 10px;
      }
    }

    /* Hero Section */
    .page-hu99__hero-section {
      position: relative;
      width: 100%;
      height: 400px; /* Adjusted height for mobile first */
      background-image: url('[GALLERY:banner:hu99_hero,cacuoc,khuyenmai]');
      background-size: cover;
      background-position: center;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      color: var(--page-hu99-text-light);
      padding-top: 10px; /* Spacing for fixed header */
      box-sizing: border-box;
      overflow: hidden; /* Ensure image doesn't overflow */
    }

    @media (min-width: 769px) {
      .page-hu99__hero-section {
        height: 500px;
        padding-top: 10px; /* Spacing for fixed header */
      }
    }

    .page-hu99__hero-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0, 0, 0, 0.5); /* Dark overlay for text readability */
    }

    .page-hu99__hero-content {
      position: relative;
      z-index: 1;
      max-width: 90%;
      padding: 20px;
    }

    .page-hu99__main-title {
      font-size: 2.2em;
      margin-bottom: 10px;
      font-weight: bold;
      color: var(--page-hu99-text-light);
    }

    .page-hu99__hero-description {
      font-size: 1.1em;
      margin-bottom: 20px;
      color: var(--page-hu99-text-light);
    }

    .page-hu99__cta-button {
      display: inline-block;
      background-color: var(--page-hu99-accent-color);
      color: var(--page-hu99-text-dark);
      padding: 12px 25px;
      border-radius: 5px;
      font-size: 1.1em;
      font-weight: bold;
      text-decoration: none;
      transition: background-color 0.3s ease;
      border: none;
      cursor: pointer;
    }

    .page-hu99__cta-button:hover {
      background-color: #e0a800;
    }

    /* Floating Promotion Button */
    .page-hu99__floating-promo {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: #dc3545; /* Red for urgency */
      color: var(--page-hu99-text-light);
      padding: 15px 20px;
      border-radius: 50px;
      text-align: center;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
      z-index: 1000;
      animation: page-hu99__pulse 1.5s infinite;
      cursor: pointer;
      border: none;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1em;
      font-weight: bold;
      max-width: 250px; /* Limit width on desktop */
    }

    .page-hu99__floating-promo:hover {
      background-color: #c82333;
    }

    .page-hu99__floating-promo-text {
      margin: 0;
      white-space: nowrap;
    }

    @keyframes page-hu99__pulse {
      0% {
        transform: scale(1);
      }
      50% {
        transform: scale(1.05);
      }
      100% {
        transform: scale(1);
      }
    }

    @media (max-width: 768px) {
      .page-hu99__main-title {
        font-size: 1.8em;
      }
      .page-hu99__hero-description {
        font-size: 1em;
      }
      .page-hu99__cta-button {
        padding: 10px 20px;
        font-size: 1em;
      }
      .page-hu99__floating-promo {
        bottom: 15px;
        right: 15px;
        padding: 12px 18px;
        font-size: 1em;
        max-width: 90%; /* Allow wider on mobile */
        width: auto;
      }
    }

    /* Section Styling */
    .page-hu99__section {
      padding: 40px 0;
      background-color: var(--page-hu99-background-light);
    }

    .page-hu99__section--dark {
      background-color: var(--page-hu99-background-dark);
      color: var(--page-hu99-text-light);
    }

    .page-hu99__section-title {
      font-size: 2em;
      color: var(--page-hu99-primary-color);
      text-align: center;
      margin-bottom: 30px;
      font-weight: bold;
    }

    .page-hu99__section--dark .page-hu99__section-title {
      color: var(--page-hu99-accent-color);
    }

    /* Games Grid */
    .page-hu99__games-grid,
    .page-hu99__download-grid,
    .page-hu99__why-choose-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 25px;
      margin-top: 20px;
    }

    @media (max-width: 768px) {
      .page-hu99__games-grid,
      .page-hu99__download-grid,
      .page-hu99__why-choose-grid {
        grid-template-columns: 1fr; /* Single column on mobile */
        gap: 20px;
      }
    }

    .page-hu99__game-card,
    .page-hu99__download-item,
    .page-hu99__why-choose-item {
      background-color: var(--page-hu99-text-light);
      border-radius: 8px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
      overflow: hidden;
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      box-sizing: border-box;
      padding-bottom: 20px; /* Ensure content has space */
    }

    .page-hu99__section--dark .page-hu99__game-card,
    .page-hu99__section--dark .page-hu99__download-item,
    .page-hu99__section--dark .page-hu99__why-choose-item {
      background-color: #495057;
      color: var(--page-hu99-text-light);
    }

    .page-hu99__game-card:hover,
    .page-hu99__download-item:hover,
    .page-hu99__why-choose-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15);
    }

    .page-hu99__game-image,
    .page-hu99__download-image,
    .page-hu99__why-choose-icon {
      width: 100%;
      height: 200px; /* Fixed height for consistency */
      object-fit: cover;
      display: block;
      border-top-left-radius: 8px;
      border-top-right-radius: 8px;
      max-width: 100%;
      height: auto;
    }
    
    .page-hu99__why-choose-icon {
        height: 120px; /* Smaller for icons */
        object-fit: contain;
        padding: 20px;
    }

    .page-hu99__game-title,
    .page-hu99__download-title,
    .page-hu99__why-choose-title {
      font-size: 1.4em;
      margin: 15px 0 10px;
      color: var(--page-hu99-primary-color);
      padding: 0 15px;
    }

    .page-hu99__section--dark .page-hu99__game-title,
    .page-hu99__section--dark .page-hu99__download-title,
    .page-hu99__section--dark .page-hu99__why-choose-title {
      color: var(--page-hu99-accent-color);
    }

    .page-hu99__game-description,
    .page-hu99__download-description,
    .page-hu99__why-choose-description {
      font-size: 0.95em;
      color: var(--page-hu99-secondary-color);
      padding: 0 15px;
      margin-bottom: 15px;
    }

    .page-hu99__section--dark .page-hu99__game-description,
    .page-hu99__section--dark .page-hu99__download-description,
    .page-hu99__section--dark .page-hu99__why-choose-description {
      color: #ced4da;
    }
    
    /* FAQ Section */
    .page-hu99__faq-section {
      padding: 40px 0;
      background-color: var(--page-hu99-background-light);
    }

    .page-hu99__faq-list {
      max-width: 800px;
      margin: 20px auto;
      list-style: none;
      padding: 0;
    }

    .page-hu99__faq-item {
      background-color: var(--page-hu99-text-light);
      border: 1px solid var(--page-hu99-border-color);
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
      box-sizing: border-box;
    }

    .page-hu99__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      background-color: #e9ecef;
      cursor: pointer;
      user-select: none;
      transition: background-color 0.3s ease;
    }

    .page-hu99__faq-question:hover {
      background-color: #dee2e6;
    }

    .page-hu99__faq-question h3 {
      margin: 0;
      font-size: 1.15em;
      color: var(--page-hu99-text-dark);
      pointer-events: none; /* Prevents text from blocking click event */
      flex-grow: 1;
      text-align: left;
    }

    .page-hu99__faq-toggle {
      font-size: 1.5em;
      font-weight: bold;
      color: var(--page-hu99-primary-color);
      margin-left: 15px;
      pointer-events: none; /* Prevents toggle icon from blocking click event */
      transition: transform 0.3s ease;
    }

    .page-hu99__faq-item.active .page-hu99__faq-toggle {
      transform: rotate(45deg); /* Changes '+' to 'x' or '-' */
    }

    .page-hu99__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 15px;
      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-hu99-text-dark);
      text-align: left;
    }

    .page-hu99__faq-item.active .page-hu99__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to show content */
      padding: 20px 15px !important;
      opacity: 1;
    }

    @media (max-width: 768px) {
      .page-hu99__faq-question {
        padding: 12px 15px;
      }
      .page-hu99__faq-question h3 {
        font-size: 1em;
      }
      .page-hu99__faq-answer {
        padding: 0 10px;
      }
      .page-hu99__faq-item.active .page-hu99__faq-answer {
        padding: 15px 10px !important;
      }
    }

    /* General responsive image and list item styles */
    .page-hu99 img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .page-hu99 ul, .page-hu99 ol {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .page-hu99__list-item { /* Generic list item class for mobile responsiveness */
      box-sizing: border-box;
      word-wrap: break-word !important;
      overflow-wrap: break-word !important;
    }

    @media (max-width: 768px) {
      .page-hu99__games-grid > *,
      .page-hu99__download-grid > *,
      .page-hu99__why-choose-grid > * {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding-left: 10px !important; /* Adjust padding to avoid too narrow content */
        padding-right: 10px !important;
      }

      .page-hu99__games-grid,
      .page-hu99__download-grid,
      .page-hu99__why-choose-grid {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 0 !important;
        padding-right: 0 !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
      }
    }