:root {
      --page-pg99-primary-color: #e44d26; /* Cam đỏ */
      --page-pg99-secondary-color: #333; /* Xám đậm */
      --page-pg99-accent-color: #f7b200; /* Vàng cam */
      --page-pg99-text-light: #fff;
      --page-pg99-text-dark: #333;
      --page-pg99-bg-dark: #1a1a1a;
      --page-pg99-bg-light: #f5f5f5;
      --page-pg99-border-color: #444;
      --page-pg99-shadow: rgba(0, 0, 0, 0.2);
    }

    .page-pg99 {
      font-family: 'Arial', sans-serif;
      line-height: 1.6;
      color: var(--page-pg99-text-light);
      background-color: var(--page-pg99-bg-dark);
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }

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

    .page-pg99__hero-section {
      position: relative;
      width: 100%;
      min-height: 400px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text-align: center;
      color: var(--page-pg99-text-light);
      overflow: hidden;
      padding-top: 10px; /* Desktop: Ensure content is not hidden by fixed header */
      box-sizing: border-box;
    }

    .page-pg99__hero-image {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      z-index: 0;
      max-width: 100%; /* Ensure image responsiveness */
      height: auto; /* Maintain aspect ratio */
    }

    .page-pg99__hero-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.8));
      z-index: 1;
    }

    .page-pg99__hero-content {
      position: relative;
      z-index: 2;
      padding: 20px;
      max-width: 800px;
    }

    .page-pg99__hero-title {
      font-size: 2.8em;
      margin-bottom: 15px;
      color: var(--page-pg99-accent-color);
      text-shadow: 2px 2px 4px var(--page-pg99-shadow);
    }

    .page-pg99__hero-subtitle {
      font-size: 1.2em;
      margin-bottom: 30px;
      font-weight: 300;
    }

    .page-pg99__button {
      display: inline-block;
      background-color: var(--page-pg99-primary-color);
      color: var(--page-pg99-text-light);
      padding: 12px 25px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.2s ease;
      border: none;
      cursor: pointer;
      font-size: 1em;
      min-width: 150px; /* Ensure button is not too small */
    }

    .page-pg99__button:hover {
      background-color: #bf3a1d;
      transform: translateY(-2px);
    }

    .page-pg99__section {
      padding: 60px 0;
      text-align: center;
    }

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

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

    .page-pg99__section-title {
      font-size: 2.2em;
      margin-bottom: 40px;
      color: var(--page-pg99-accent-color);
    }

    .page-pg99__section-description {
      max-width: 800px;
      margin: 0 auto 50px auto;
      font-size: 1.1em;
      color: var(--page-pg99-text-light);
    }
    .page-pg99__section--light .page-pg99__section-description {
        color: var(--page-pg99-text-dark);
    }

    .page-pg99__grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-pg99__card {
      background-color: #2a2a2a;
      border-radius: 10px;
      padding: 30px;
      box-shadow: 0 5px 15px var(--page-pg99-shadow);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      color: var(--page-pg99-text-light);
      text-align: left;
      border: 1px solid var(--page-pg99-border-color);
    }
    .page-pg99__section--light .page-pg99__card {
        background-color: #fff;
        color: var(--page-pg99-text-dark);
        border: 1px solid #ddd;
    }

    .page-pg99__card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
    }

    .page-pg99__card-icon {
      width: 100%;
      max-width: 300px; /* Max width for content images */
      height: auto;
      margin-bottom: 20px;
      border-radius: 8px;
      object-fit: cover;
      min-width: 200px; /* Minimum width for content images */
      min-height: 200px; /* Minimum height for content images */
    }

    .page-pg99__card-title {
      font-size: 1.5em;
      margin-bottom: 15px;
      color: var(--page-pg99-primary-color);
    }

    .page-pg99__card-text {
      font-size: 0.95em;
      line-height: 1.7;
    }

    .page-pg99__cta-section {
      background-color: var(--page-pg99-primary-color);
      padding: 80px 20px;
      text-align: center;
      color: var(--page-pg99-text-light);
    }

    .page-pg99__cta-title {
      font-size: 2.5em;
      margin-bottom: 20px;
    }

    .page-pg99__cta-text {
      font-size: 1.2em;
      margin-bottom: 40px;
      max-width: 900px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-pg99__faq-section {
      padding: 60px 0;
      background-color: var(--page-pg99-bg-light);
      color: var(--page-pg99-text-dark);
    }

    .page-pg99__faq-list {
      max-width: 900px;
      margin: 0 auto;
      text-align: left;
    }

    .page-pg99__faq-item {
      background-color: #fff;
      border: 1px solid #ddd;
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }

    .page-pg99__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 18px 25px;
      background-color: #f9f9f9;
      cursor: pointer;
      user-select: none;
      font-size: 1.1em;
      font-weight: bold;
      color: var(--page-pg99-primary-color);
      transition: background-color 0.3s ease;
    }

    .page-pg99__faq-question:hover {
      background-color: #f0f0f0;
    }

    .page-pg99__faq-question h3 {
      margin: 0;
      font-size: 1.1em;
      pointer-events: none; /* Prevent h3 from blocking click */
      color: var(--page-pg99-text-dark);
    }

    .page-pg99__faq-toggle {
      font-size: 1.8em;
      line-height: 1;
      color: var(--page-pg99-primary-color);
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle from blocking click */
    }

    .page-pg99__faq-item.active .page-pg99__faq-toggle {
      transform: rotate(45deg); /* Change + to X or - */
    }

    .page-pg99__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px; /* Initial padding */
      background-color: #fff;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      font-size: 0.95em;
      color: var(--page-pg99-text-dark);
      opacity: 0;
    }

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

    .page-pg99__faq-answer p {
        margin: 0 0 10px 0;
    }
    .page-pg99__faq-answer p:last-child {
        margin-bottom: 0;
    }


    .page-pg99__floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--page-pg99-accent-color);
      color: var(--page-pg99-text-dark);
      padding: 15px 25px;
      border-radius: 50px;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
      font-weight: bold;
      text-align: center;
      text-decoration: none;
      z-index: 1000;
      transition: background-color 0.3s ease, transform 0.2s ease;
      display: flex;
      align-items: center;
      gap: 10px;
      cursor: pointer;
    }

    .page-pg99__floating-button:hover {
      background-color: #e0a800;
      transform: translateY(-3px);
    }
    .page-pg99__floating-button-icon {
        width: 32px; /* Small icon size is allowed for floating buttons/UI elements */
        height: 32px;
        max-width: 100%;
        height: auto;
        object-fit: contain;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .page-pg99__hero-section {
        min-height: 300px;
        padding-top: 10px; /* Mobile: Ensure content is not hidden by fixed header */
      }

      .page-pg99__hero-title {
        font-size: 2em;
      }

      .page-pg99__hero-subtitle {
        font-size: 1em;
      }

      .page-pg99__section {
        padding: 40px 0;
      }

      .page-pg99__section-title {
        font-size: 1.8em;
      }

      .page-pg99__section-description {
        font-size: 0.95em;
        margin-bottom: 30px;
      }

      .page-pg99__grid {
        grid-template-columns: 1fr;
        padding: 0 15px;
      }

      .page-pg99__card {
        padding: 20px;
      }

      .page-pg99__card-title {
        font-size: 1.3em;
      }

      .page-pg99__cta-title {
        font-size: 1.8em;
      }

      .page-pg99__cta-text {
        font-size: 1em;
      }

      .page-pg99__faq-section {
        padding: 40px 0;
      }

      .page-pg99__faq-question {
        padding: 15px 20px;
        font-size: 1em;
      }
      .page-pg99__faq-question h3 {
          font-size: 1em;
      }

      .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: 0.9em;
      }

      /* Image responsiveness for mobile */
      .page-pg99 img {
        max-width: 100% !important;
        height: auto !important;
        box-sizing: border-box !important;
      }
      .page-pg99 .page-pg99__card-icon {
          width: 100% !important;
          max-width: 100% !important;
          height: auto !important;
          object-fit: cover !important;
      }
    }