:root {
      --page-pg99-primary-color: #e44d26; /* Cam đỏ */
      --page-pg99-secondary-color: #ff8c00; /* Cam đậm */
      --page-pg99-accent-color: #4CAF50; /* Xanh lá */
      --page-pg99-text-color: #333;
      --page-pg99-light-text-color: #fff;
      --page-pg99-bg-light: #f9f9f9;
      --page-pg99-bg-dark: #2c3e50; /* Xám đậm */
      --page-pg99-border-color: #ddd;
      --page-pg99-shadow: rgba(0, 0, 0, 0.1);
    }

    .page-pg99 {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--page-pg99-text-color);
      background-color: var(--page-pg99-bg-light);
    }

    .page-pg99__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
    }

    .page-pg99__hero-section {
      text-align: center;
      background-color: var(--page-pg99-bg-dark);
      color: var(--page-pg99-light-text-color);
      padding: 10px 20px 40px; /* Adjusted padding-top for fixed header */
      position: relative;
      overflow: hidden;
    }

    .page-pg99__hero-image {
      width: 100%;
      height: auto;
      max-height: 400px;
      object-fit: cover;
      border-radius: 8px;
      margin-bottom: 20px;
      max-width: 100%;
      box-sizing: border-box;
    }

    .page-pg99__hero-content {
      position: relative;
      z-index: 1;
    }

    .page-pg99__hero-title {
      font-size: 2.8em;
      margin-bottom: 15px;
      color: var(--page-pg99-light-text-color);
      line-height: 1.2;
    }

    .page-pg99__hero-subtitle {
      font-size: 1.3em;
      margin-bottom: 30px;
      color: #f0f0f0;
    }

    .page-pg99__button {
      display: inline-block;
      background-color: var(--page-pg99-primary-color);
      color: var(--page-pg99-light-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 0.3s ease;
      border: none;
      cursor: pointer;
    }

    .page-pg99__button:hover {
      background-color: var(--page-pg99-secondary-color);
      transform: translateY(-2px);
    }

    .page-pg99__section {
      padding: 40px 0;
      background-color: var(--page-pg99-bg-light);
      text-align: center;
    }

    .page-pg99__section--dark {
      background-color: var(--page-pg99-bg-dark);
      color: var(--page-pg99-light-text-color);
    }

    .page-pg99__section-title {
      font-size: 2.2em;
      margin-bottom: 30px;
      color: var(--page-pg99-primary-color);
    }
    .page-pg99__section--dark .page-pg99__section-title {
      color: var(--page-pg99-light-text-color);
    }

    .page-pg99__text-content {
      max-width: 800px;
      margin: 0 auto 30px;
      font-size: 1.1em;
      line-height: 1.8;
      text-align: left;
    }

    .page-pg99__grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 30px;
    }

    .page-pg99__card {
      background-color: #fff;
      border-radius: 10px;
      box-shadow: 0 4px 15px var(--page-pg99-shadow);
      padding: 25px;
      text-align: center;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .page-pg99__card:hover {
      transform: translateY(-5px);
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    }

    .page-pg99__card-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      border-radius: 8px;
      margin-bottom: 15px;
      max-width: 100%;
      box-sizing: border-box;
    }
    .page-pg99__card-image--gamelogo {
      width: 150px; /* Smaller for game logos */
      height: 150px;
      object-fit: contain; /* Use contain for logos */
      border-radius: 0; /* No border-radius for logos */
      margin-bottom: 15px;
      max-width: 100%;
      box-sizing: border-box;
    }

    .page-pg99__card-title {
      font-size: 1.5em;
      margin-bottom: 10px;
      color: var(--page-pg99-primary-color);
    }

    .page-pg99__card-description {
      font-size: 1em;
      color: #666;
      flex-grow: 1;
    }

    .page-pg99__list {
      list-style: none;
      padding: 0;
      text-align: left;
      max-width: 700px;
      margin: 0 auto;
    }

    .page-pg99__list-item {
      background-color: #fff;
      margin-bottom: 10px;
      padding: 15px 20px;
      border-radius: 8px;
      box-shadow: 0 2px 8px var(--page-pg99-shadow);
      display: flex;
      align-items: center;
      font-size: 1.1em;
      color: var(--page-pg99-text-color);
    }

    .page-pg99__list-item::before {
      content: '✔';
      color: var(--page-pg99-accent-color);
      margin-right: 10px;
      font-weight: bold;
    }

    .page-pg99__faq-section {
      padding: 40px 0;
      background-color: var(--page-pg99-bg-light);
    }

    .page-pg99__faq-list {
      max-width: 800px;
      margin: 0 auto;
    }

    .page-pg99__faq-item {
      background-color: #fff;
      margin-bottom: 15px;
      border-radius: 8px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
      overflow: hidden;
    }

    .page-pg99__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 25px;
      background-color: #f0f0f0;
      cursor: pointer;
      user-select: none;
      font-size: 1.2em;
      font-weight: bold;
      color: var(--page-pg99-text-color);
      transition: background-color 0.3s ease;
    }

    .page-pg99__faq-question h3 {
      margin: 0;
      flex-grow: 1;
      pointer-events: none; /* Prevent h3 from blocking click event on parent */
    }

    .page-pg99__faq-question:hover {
      background-color: #e0e0e0;
    }

    .page-pg99__faq-toggle {
      font-size: 1.5em;
      line-height: 1;
      margin-left: 15px;
      color: var(--page-pg99-primary-color);
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle icon from blocking click event on parent */
    }

    .page-pg99__faq-item.active .page-pg99__faq-toggle {
      transform: rotate(45deg); /* Change '+' to 'x' or similar effect */
      color: var(--page-pg99-secondary-color);
    }

    .page-pg99__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      background-color: #fff;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
      color: #555;
      font-size: 1em;
      text-align: left;
    }

    .page-pg99__faq-item.active .page-pg99__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to contain content */
      padding: 20px 25px !important;
      opacity: 1;
    }

    .page-pg99__floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--page-pg99-accent-color);
      color: var(--page-pg99-light-text-color);
      padding: 15px 25px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
      z-index: 1000;
      transition: background-color 0.3s ease, transform 0.3s ease;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .page-pg99__floating-button:hover {
      background-color: #5cb85c;
      transform: translateY(-3px);
    }

    .page-pg99__floating-button-icon {
      font-size: 1.5em;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-pg99__hero-section {
        padding-top: 10px; /* Adjusted padding-top for fixed header on mobile */
      }
      .page-pg99__hero-title {
        font-size: 2em;
      }
      .page-pg99__hero-subtitle {
        font-size: 1em;
      }
      .page-pg99__button {
        padding: 12px 25px;
        font-size: 1em;
      }
      .page-pg99__section-title {
        font-size: 1.8em;
      }
      .page-pg99__text-content,
      .page-pg99__list-item,
      .page-pg99__card-description {
        font-size: 0.95em;
      }
      .page-pg99__card-title {
        font-size: 1.3em;
      }
      .page-pg99__card-image {
        height: 180px;
      }
      .page-pg99__card-image--gamelogo {
        width: 120px;
        height: 120px;
      }
      .page-pg99__faq-question {
        font-size: 1.1em;
        padding: 15px 20px;
      }
      .page-pg99__faq-answer {
        padding: 0 20px;
      }
      .page-pg99__faq-item.active .page-pg99__faq-answer {
        padding: 15px 20px !important;
      }
      .page-pg99__floating-button {
        bottom: 15px;
        right: 15px;
        padding: 12px 20px;
        font-size: 1em;
      }
      /* Image responsive override */
      .page-pg99 img {
        max-width: 100% !important;
        height: auto !important;
      }
      .page-pg99__card-image,
      .page-pg99__hero-image,
      .page-pg99__card-image--gamelogo {
        width: 100% !important;
        max-width: 100% !important;
        height: auto !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
    }

    @media (max-width: 480px) {
      .page-pg99__container {
        padding: 15px;
      }
      .page-pg99__hero-title {
        font-size: 1.8em;
      }
      .page-pg99__floating-button {
        font-size: 0.9em;
        padding: 10px 18px;
      }
    }