.page-gioi-thieu-ung-dung {
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  color: #333333; /* Default text color for light backgrounds */
  background-color: var(--background-color, #f8f8f8); /* Default light background */
}

.page-gioi-thieu-ung-dung__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

.page-gioi-thieu-ung-dung__container--narrow {
  max-width: 800px;
}

.page-gioi-thieu-ung-dung__section {
  padding: 40px 0;
  margin-bottom: 20px;
}

.page-gioi-thieu-ung-dung__section-title {
  font-size: 36px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 30px;
  color: #C91F17; /* Main brand color for titles */
}

.page-gioi-thieu-ung-dung__section-title--light {
  color: #FFF5E1; /* Text Main for dark backgrounds */
}

.page-gioi-thieu-ung-dung__sub-title {
  font-size: 24px;
  font-weight: 600;
  color: #C91F17;
  margin-bottom: 15px;
}

.page-gioi-thieu-ung-dung p {
  margin-bottom: 15px;
  font-size: 17px;
}

.page-gioi-thieu-ung-dung ul,
.page-gioi-thieu-ung-dung ol {
  margin-bottom: 15px;
  padding-left: 20px;
}

.page-gioi-thieu-ung-dung ul {
  list-style: disc inside;
}

.page-gioi-thieu-ung-dung ol {
  list-style: decimal inside;
}

.page-gioi-thieu-ung-dung li {
  margin-bottom: 8px;
  font-size: 17px;
}

.page-gioi-thieu-ung-dung strong {
  font-weight: bold;
  color: #E53935; /* Accent color for emphasis */
}

/* Hero Section */
.page-gioi-thieu-ung-dung__hero-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-top: 10px; /* Small top padding as body handles header offset */
  padding-bottom: 40px;
  background-color: #B71C1C; /* Background for hero section */
  color: #FFF5E1; /* Text Main for dark background */
}

.page-gioi-thieu-ung-dung__hero-image {
  width: 100%;
  max-height: 600px;
  overflow: hidden;
  margin-bottom: 20px;
}

.page-gioi-thieu-ung-dung__hero-image img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 16/9;
}

.page-gioi-thieu-ung-dung__hero-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

.page-gioi-thieu-ung-dung__main-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  color: #FFCC66; /* Glow color for main title */
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.page-gioi-thieu-ung-dung__subtitle {
  font-size: 1.25rem;
  margin-bottom: 30px;
  color: #FFF5E1;
}

.page-gioi-thieu-ung-dung__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 30px;
}

.page-gioi-thieu-ung-dung__btn-primary,
.page-gioi-thieu-ung-dung__btn-secondary {
  display: inline-block;
  padding: 15px 30px;
  border-radius: 8px;
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  white-space: normal;
  word-wrap: break-word;
  max-width: 100%;
  box-sizing: border-box;
}

.page-gioi-thieu-ung-dung__btn-primary {
  background: linear-gradient(180deg, #FFD86A 0%, #E6B800 100%); /* Custom button gradient */
  color: #7A0E0E; /* Deep Red for text on gold button */
  border: none;
}

.page-gioi-thieu-ung-dung__btn-primary:hover {
  background: linear-gradient(180deg, #FFD86A 0%, #F4D34D 100%); /* Gold for hover */
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
  transform: translateY(-2px);
}

.page-gioi-thieu-ung-dung__btn-secondary {
  background: #C91F17; /* Main brand color */
  color: #FFF5E1; /* Text Main */
  border: 2px solid #F2B544; /* Border color */
}

.page-gioi-thieu-ung-dung__btn-secondary:hover {
  background: #E53935; /* Accent color */
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
  transform: translateY(-2px);
}

/* Overview Section */
.page-gioi-thieu-ung-dung__overview-section {
  background-color: #ffffff;
  padding-top: 60px;
  padding-bottom: 60px;
}

.page-gioi-thieu-ung-dung__content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.page-gioi-thieu-ung-dung__text-block {
  background: #fdfdfd;
  padding: 25px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}