:root {
  --primary-color: #11A84E;
  --secondary-color: #22C768;
  --button-gradient: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
  --card-bg: #11271B;
  --background-color-page: #08160F; /* Page specific background */
  --text-main: #F2FFF6;
  --text-secondary: #A7D9B8;
  --border-color: #2E7A4E;
  --glow-color: #57E38D;
  --gold-color: #F2C14E;
  --divider-color: #1E3A2A;
  --deep-green-color: #0A4B2C;
}

.page-index-tinh-nang-noi-bat {
  background-color: var(--background-color-page);
  color: var(--text-main); /* Default text color for the page */
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.page-index-tinh-nang-noi-bat__wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

/* Intro Section */
.page-index-tinh-nang-noi-bat__intro-section {
  padding-top: 10px; /* As per fixed header spacing rule */
  padding-bottom: 60px;
  text-align: center;
}

.page-index-tinh-nang-noi-bat__container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 15px;
}

.page-index-tinh-nang-noi-bat__main-title {
  font-size: clamp(28px, 4vw, 48px); /* H1 font size rule */
  color: var(--gold-color);
  margin-bottom: 20px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.page-index-tinh-nang-noi-bat__intro-text {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 30px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.page-index-tinh-nang-noi-bat__cta-group {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.page-index-tinh-nang-noi-bat__btn-primary,
.page-index-tinh-nang-noi-bat__btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 30px;
  border-radius: 8px;
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s ease;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
  max-width: 100%;
  min-width: 180px; /* Minimum width for buttons */
}

.page-index-tinh-nang-noi-bat__btn-primary {
  background: var(--button-gradient);
  color: var(--text-main);
  border: none;
  box-shadow: 0 4px 15px rgba(42, 209, 111, 0.4);
}

.page-index-tinh-nang-noi-bat__btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.page-index-tinh-nang-noi-bat__btn-secondary {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.page-index-tinh-nang-noi-bat__btn-secondary:hover {
  background: var(--primary-color);
  color: #fff;
  transform: translateY(-2px);
}

/* Section Title & Description */
.page-index-tinh-nang-noi-bat__section-title {
  font-size: clamp(24px, 3.5vw, 40px);
  color: var(--gold-color);
  text-align: center;
  margin-bottom: 20px;
  font-weight: 700;
  line-height: 1.2;
}

.page-index-tinh-nang-noi-bat__section-description {
  font-size: 17px;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 40px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* Dark Section Background */
.page-index-tinh-nang-noi-bat__dark-section {
  background-color: var(--card-bg);
  padding-top: 80px;
  padding-bottom: 80px;
}

/* Features Section */
.page-index-tinh-nang-noi-bat__features-section {
  padding-top: 80px;
  padding-bottom: 80px;
}

.page-index-tinh-nang-noi-bat__feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.page-index-tinh-nang-noi-bat__feature-card {
  background-color: var(--deep-green-color);
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease;
  border: 1px solid var(--border-color);
}

.page-index-tinh-nang-noi-bat__feature-card:hover {
  transform: translateY(-5px);
}

.page-index-tinh-nang-noi-bat__feature-icon {
  margin-bottom: 20px;
  width: 100%;
  height: 200px; /* Fixed height for consistent image display */
  overflow: hidden;
  border-radius: 8px;
}

.page-index-tinh-nang-noi-bat__feature-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 8px;
  display: block;
}

.page-index-tinh-nang-noi-bat__feature-title {
  font-size: 22px;
  color: var(--text-main);
  margin-bottom: 15px;
  font-weight: 600;
}

.page-index-tinh-nang-noi-bat__feature-text {
  font-size: 16px;
  color: var(--text-secondary);
}

/* Benefits Section */
.page-index-tinh-nang-noi-bat__benefits-section {
  padding-top: 80px;
  padding-bottom: 80px;
}

.page-index-tinh-nang-noi-bat__benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.page-index-tinh-nang-noi-bat__benefit-item {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
}

.page-index-tinh-nang-noi-bat__benefit-title {
  font-size: 24px;
  color: var(--gold-color);
  margin-bottom: 15px;
  font-weight: 600;
}

.page-index-tinh-nang-noi-bat__benefit-text {
  font-size: 16px;
  color: var(--text-secondary);
}

/* Guide Section (How-to) */
.page-index-tinh-nang-noi-bat__guide-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-index-tinh-nang-noi-bat__step-item {
  background-color: var(--deep-green-color);
  border-radius: 12px;
  padding: 25px;
  text-align: center;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
}

.page-index-tinh-nang-noi-bat__step-item img {
  width: 100%;
  max-width: 400px; /* Constrain image width within step */
  height: auto;
  border-radius: 8px;
  margin-bottom: 20px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.page-index-tinh-nang-noi-bat__step-title {
  font-size: 22px;
  color: var(--text-main);
  margin-bottom: 10px;
  font-weight: 600;
}

.page-index-tinh-nang-noi-bat__step-text {
  font-size: 16px;
  color: var(--text-secondary);
}

.page-index-tinh-nang-noi-bat__cta-group--center {
  margin-top: 50px;
}

/* FAQ Section */
.page-index-tinh-nang-noi-bat__faq-section {
  padding-top: 80px;
  padding-bottom: 80px;
}

.page-index-tinh-nang-noi-bat__faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.page-index-tinh-nang-noi-bat__faq-item {
  background-color: var(--deep-green-color);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.page-index-tinh-nang-noi-bat__faq-item summary {
  list-style: none; /* Remove default marker */
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 25px;
  cursor: pointer;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  background-color: var(--deep-green-color);
  position: relative;
}

.page-index-tinh-nang-noi-bat__faq-item summary::-webkit-details-marker {
  display: none; /* Hide for Webkit browsers */
}

.page-index-tinh-nang-noi-bat__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.page-index-tinh-nang-noi-bat__faq-qtext {
  flex-grow: 1;
}

.page-index-tinh-nang-noi-bat__faq-toggle {
  font-size: 24px;
  line-height: 1;
  margin-left: 15px;
  color: var(--gold-color);
  transition: transform 0.3s ease;
}

.page-index-tinh-nang-noi-bat__faq-item[open] .page-index-tinh-nang-noi-bat__faq-toggle {
  transform: rotate(45deg); /* Rotate for 'x' effect */
}

.page-index-tinh-nang-noi-bat__faq-answer {
  padding: 0 25px 20px;
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Conclusion Section */
.page-index-tinh-nang-noi-bat__conclusion-section {
  padding-top: 80px;
  padding-bottom: 80px;
  text-align: center;
}

.page-index-tinh-nang-noi-bat__conclusion-text {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto 40px;
}

/* Global image styles */
.page-index-tinh-nang-noi-bat img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .page-index-tinh-nang-noi-bat__container {
    padding: 0 25px;
  }
  .page-index-tinh-nang-noi-bat__section-title {
    font-size: 32px;
  }
  .page-index-tinh-nang-noi-bat__intro-text {
    font-size: 17px;
  }
  .page-index-tinh-nang-noi-bat__feature-grid,
  .page-index-tinh-nang-noi-bat__benefits-grid,
  .page-index-tinh-nang-noi-bat__guide-steps {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
  }
}

@media (max-width: 768px) {
  /* Intro Section */
  .page-index-tinh-nang-noi-bat__intro-section {
    padding-top: 10px !important;
    padding-bottom: 40px;
  }
  .page-index-tinh-nang-noi-bat__main-title {
    font-size: 32px;
  }
  .page-index-tinh-nang-noi-bat__intro-text {
    font-size: 16px;
  }
  .page-index-tinh-nang-noi-bat__cta-group {
    flex-direction: column;
    gap: 15px;
  }
  .page-index-tinh-nang-noi-bat__btn-primary,
  .page-index-tinh-nang-noi-bat__btn-secondary {
    max-width: 100% !important;
    width: 100% !important;
    padding: 12px 20px;
    font-size: 16px;
    white-space: normal !important;
    word-wrap: break-word !important;
    min-width: unset; /* Remove min-width for mobile */
  }

  /* Section Titles & Descriptions */
  .page-index-tinh-nang-noi-bat__section-title {
    font-size: 28px;
    margin-bottom: 15px;
  }
  .page-index-tinh-nang-noi-bat__section-description {
    font-size: 15px;
    margin-bottom: 30px;
  }
  
  /* Dark Section Padding */
  .page-index-tinh-nang-noi-bat__dark-section {
    padding-top: 50px;
    padding-bottom: 50px;
  }

  /* Features Section */
  .page-index-tinh-nang-noi-bat__features-section {
    padding-top: 50px;
    padding-bottom: 50px;
  }
  .page-index-tinh-nang-noi-bat__feature-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .page-index-tinh-nang-noi-bat__feature-card {
    padding: 20px;
  }
  .page-index-tinh-nang-noi-bat__feature-icon {
    height: 180px; /* Adjust height for mobile */
  }
  .page-index-tinh-nang-noi-bat__feature-title {
    font-size: 20px;
  }
  .page-index-tinh-nang-noi-bat__feature-text {
    font-size: 15px;
  }

  /* Benefits Section */
  .page-index-tinh-nang-noi-bat__benefits-section {
    padding-top: 50px;
    padding-bottom: 50px;
  }
  .page-index-tinh-nang-noi-bat__benefits-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .page-index-tinh-nang-noi-bat__benefit-item {
    padding: 20px;
  }
  .page-index-tinh-nang-noi-bat__benefit-title {
    font-size: 22px;
  }
  .page-index-tinh-nang-noi-bat__benefit-text {
    font-size: 15px;
  }

  /* Guide Section */
  .page-index-tinh-nang-noi-bat__guide-steps {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 30px;
  }
  .page-index-tinh-nang-noi-bat__step-item {
    padding: 20px;
  }
  .page-index-tinh-nang-noi-bat__step-title {
    font-size: 20px;
  }
  .page-index-tinh-nang-noi-bat__step-text {
    font-size: 15px;
  }
  .page-index-tinh-nang-noi-bat__cta-group--center {
    margin-top: 30px;
  }

  /* FAQ Section */
  .page-index-tinh-nang-noi-bat__faq-section {
    padding-top: 50px;
    padding-bottom: 50px;
  }
  .page-index-tinh-nang-noi-bat__faq-item summary {
    padding: 15px 20px;
    font-size: 16px;
  }
  .page-index-tinh-nang-noi-bat__faq-toggle {
    font-size: 20px;
  }
  .page-index-tinh-nang-noi-bat__faq-answer {
    padding: 0 20px 15px;
    font-size: 15px;
  }

  /* Conclusion Section */
  .page-index-tinh-nang-noi-bat__conclusion-section {
    padding-top: 50px;
    padding-bottom: 50px;
  }
  .page-index-tinh-nang-noi-bat__conclusion-text {
    font-size: 16px;
    margin-bottom: 30px;
  }

  /* Universal image and container responsive styles */
  .page-index-tinh-nang-noi-bat img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-index-tinh-nang-noi-bat__container,
  .page-index-tinh-nang-noi-bat__wrapper,
  .page-index-tinh-nang-noi-bat__feature-card,
  .page-index-tinh-nang-noi-bat__benefit-item,
  .page-index-tinh-nang-noi-bat__step-item,
  .page-index-tinh-nang-noi-bat__faq-item {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }
  /* Specific override for .page-index-tinh-nang-noi-bat__container to avoid double padding if wrapper also has it */
  .page-index-tinh-nang-noi-bat__wrapper > .page-index-tinh-nang-noi-bat__container {
    padding-left: 0;
    padding-right: 0;
  }
}