.page-lien-ket-doi-tac {
  font-family: 'Arial', sans-serif;
  color: var(--text-main, #FFF5E1); /* Default text color for dark sections */
  background-color: var(--background, #B71C1C); /* Default background color */
}

.page-lien-ket-doi-tac__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

.page-lien-ket-doi-tac__dark-section {
  background-color: var(--background, #B71C1C);
  color: var(--text-main, #FFF5E1);
}

.page-lien-ket-doi-tac__hero-section {
  padding-top: 10px; /* Small top padding, body handles header offset */
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 500px;
}

.page-lien-ket-doi-tac__hero-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.page-lien-ket-doi-tac__hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.7);
}

.page-lien-ket-doi-tac__hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  padding: 40px 20px;
  color: #FFF5E1;
}

.page-lien-ket-doi-tac__main-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
  color: #FFD86A; /* Gold for main title */
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.page-lien-ket-doi-tac__description {
  font-size: clamp(1rem, 2vw, 1.3rem);
  line-height: 1.6;
  margin-bottom: 30px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.page-lien-ket-doi-tac__cta-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.page-lien-ket-doi-tac__cta-buttons--center {
  margin-top: 40px;
  text-align: center;
}

.page-lien-ket-doi-tac__btn-primary,
.page-lien-ket-doi-tac__btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 30px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
  max-width: 100%;
}

.page-lien-ket-doi-tac__btn-primary {
  background: linear-gradient(180deg, #FFD86A 0%, #E6B800 100%);
  color: #7A0E0E; /* Deep Red for text on gold button */
  border: 2px solid #FFCC66;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.page-lien-ket-doi-tac__btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
  background: linear-gradient(180deg, #FFE082 0%, #F4D34D 100%);
}

.page-lien-ket-doi-tac__btn-secondary {
  background: transparent;
  color: #FFD86A;
  border: 2px solid #FFD86A;
}

.page-lien-ket-doi-tac__btn-secondary:hover {
  background: rgba(255, 216, 106, 0.1);
  color: #FFF5E1;
  border-color: #FFF5E1;
}

.page-lien-ket-doi-tac__btn-large {
  min-width: 250px;
  padding: 18px 40px;
  font-size: 1.2rem;
}

.page-lien-ket-doi-tac__section {
  padding: 60px 0;
  text-align: center;
}

.page-lien-ket-doi-tac__benefits-section {
  background-color: #f5f5f5;
  color: #333333;
}

.page-lien-ket-doi-tac__section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 20px;
  color: #C91F17;
}

.page-lien-ket-doi-tac__benefits-section .page-lien-ket-doi-tac__section-title {
  color: #C91F17;
}

.page-lien-ket-doi-tac__section-intro {
  font-size: 1.1rem;
  line-height: 1.6;
  max-width: 800px;
  margin: 0 auto 40px;
  color: #555555;
}

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

.page-lien-ket-doi-tac__benefit-card {
  background: #ffffff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  color: #333333;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-lien-ket-doi-tac__benefit-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.page-lien-ket-doi-tac__benefit-card img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: 8px;
  margin-bottom: 20px;
  object-fit: cover;
}

.page-lien-ket-doi-tac__card-title {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 15px;
  color: #C91F17;
}

.page-lien-ket-doi-tac__card-text {
  font-size: 1rem;
  line-height: 1.6;
  color: #555555;
}

.page-lien-ket-doi-tac__products-section {
  background-color: var(--background, #B71C1C);
  color: var(--text-main, #FFF5E1);
}

.page-lien-ket-doi-tac__products-section .page-lien-ket-doi-tac__section-title {
  color: #FFD86A;
}

.page-lien-ket-doi-tac__products-section .page-lien-ket-doi-tac__section-intro {
  color: #FFF5E1;
}

.page-lien-ket-doi-tac__products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-lien-ket-doi-tac__product-card {
  background: var(--card-bg, #D32F2F);
  padding: 25px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  color: #FFF5E1;
  border: 1px solid var(--border, #F2B544);
}

.page-lien-ket-doi-tac__product-card img {
  width: 100%;
  max-width: 300px;
  height: auto;
  border-radius: 8px;
  margin-bottom: 15px;
  object-fit: cover;
}

.page-lien-ket-doi-tac__product-card .page-lien-ket-doi-tac__card-title {
  color: #FFD86A;
}

.page-lien-ket-doi-tac__product-card .page-lien-ket-doi-tac__card-text {
  color: #FFF5E1;
  flex-grow: 1;
}

.page-lien-ket-doi-tac__card-link {
  display: inline-block;
  margin-top: 20px;
  color: #FFD86A;
  text-decoration: none;
  font-weight: 600;
  position: relative;
}

.page-lien-ket-doi-tac__card-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -5px;
  width: 100%;
  height: 2px;
  background-color: #FFD86A;
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.page-lien-ket-doi-tac__card-link:hover::after {
  transform: scaleX(1);
}

.page-lien-ket-doi-tac__register-process-section {
  background-color: #f5f5f5;
  color: #333333;
}

.page-lien-ket-doi-tac__register-process-section .page-lien-ket-doi-tac__section-title {
  color: #C91F17;
}

.page-lien-ket-doi-tac__register-process-section .page-lien-ket-doi-tac__section-intro {
  color: #555555;
}

.page-lien-ket-doi-tac__process-steps {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.page-lien-ket-doi-tac__step-card {
  background: #ffffff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  text-align: center;
  flex: 1;
  min-width: 280px;
  max-width: 350px;
  color: #333333;
}

.page-lien-ket-doi-tac__step-icon {
  width: 60px;
  height: 60px;
  background-color: #C91F17;
  color: #FFF5E1;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  margin: 0 auto 20px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.page-lien-ket-doi-tac__step-card .page-lien-ket-doi-tac__card-title {
  color: #C91F17;
}

.page-lien-ket-doi-tac__step-card .page-lien-ket-doi-tac__card-text {
  color: #555555;
}

.page-lien-ket-doi-tac__support-section {
  background-color: var(--background, #B71C1C);
  color: var(--text-main, #FFF5E1);
}

.page-lien-ket-doi-tac__support-section .page-lien-ket-doi-tac__section-title {
  color: #FFD86A;
}

.page-lien-ket-doi-tac__support-section .page-lien-ket-doi-tac__section-intro {
  color: #FFF5E1;
}

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

.page-lien-ket-doi-tac__support-item {
  background: var(--card-bg, #D32F2F);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  text-align: center;
  color: #FFF5E1;
  border: 1px solid var(--border, #F2B544);
}

.page-lien-ket-doi-tac__support-item img {
  width: 100%;
  max-width: 200px;
  height: auto;
  border-radius: 8px;
  margin-bottom: 20px;
  object-fit: cover;
}

.page-lien-ket-doi-tac__support-item .page-lien-ket-doi-tac__card-title {
  color: #FFD86A;
}

.page-lien-ket-doi-tac__support-item .page-lien-ket-doi-tac__card-text {
  color: #FFF5E1;
}

.page-lien-ket-doi-tac__faq-section {
  background-color: #f5f5f5;
  color: #333333;
}

.page-lien-ket-doi-tac__faq-section .page-lien-ket-doi-tac__section-title {
  color: #C91F17;
}

.page-lien-ket-doi-tac__faq-list {
  margin-top: 40px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

details.page-lien-ket-doi-tac__faq-item {
  margin-bottom: 15px;
  border-radius: 8px;
  border: 1px solid #e0e0e0;
  overflow: hidden;
  background: #fff;
  color: #333333;
}

details.page-lien-ket-doi-tac__faq-item summary.page-lien-ket-doi-tac__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
}

details.page-lien-ket-doi-tac__faq-item summary.page-lien-ket-doi-tac__faq-question::-webkit-details-marker {
  display: none;
}

details.page-lien-ket-doi-tac__faq-item summary.page-lien-ket-doi-tac__faq-question:hover {
  background: #f5f5f5;
}

.page-lien-ket-doi-tac__faq-qtext {
  flex: 1;
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: #C91F17;
}

.page-lien-ket-doi-tac__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  color: #666;
  flex-shrink: 0;
  margin-left: 15px;
  width: 28px;
  text-align: center;
}

details.page-lien-ket-doi-tac__faq-item .page-lien-ket-doi-tac__faq-answer {
  padding: 0 20px 20px;
  background: #f9f9f9;
  border-radius: 0 0 8px 8px;
  text-align: left;
}

.page-lien-ket-doi-tac__faq-answer p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.6;
  color: #555555;
}

.page-lien-ket-doi-tac__cta-bottom-section {
  padding: 80px 0;
}

.page-lien-ket-doi-tac__cta-container {
  max-width: 800px;
}

.page-lien-ket-doi-tac__cta-bottom-section .page-lien-ket-doi-tac__section-title {
  color: #FFD86A;
}

.page-lien-ket-doi-tac__cta-bottom-section .page-lien-ket-doi-tac__section-intro {
  color: #FFF5E1;
  margin-bottom: 40px;
}

/* General image responsiveness */
.page-lien-ket-doi-tac img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Mobile Responsive Styles */
@media (max-width: 1024px) {
  .page-lien-ket-doi-tac__main-title {
    font-size: clamp(2rem, 4.5vw, 3rem);
  }
  .page-lien-ket-doi-tac__description {
    font-size: clamp(0.9rem, 1.8vw, 1.1rem);
  }
  .page-lien-ket-doi-tac__section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  }
  .page-lien-ket-doi-tac__cta-buttons {
    flex-direction: column;
    align-items: center;
  }
  .page-lien-ket-doi-tac__btn-primary, .page-lien-ket-doi-tac__btn-secondary {
    width: 80%;
    max-width: 350px;
  }
  .page-lien-ket-doi-tac__products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .page-lien-ket-doi-tac__hero-section {
    min-height: 400px;
  }
  .page-lien-ket-doi-tac__hero-image img {
    object-fit: contain !important; /* Mobile HERO: contain to avoid cropping */
    aspect-ratio: unset;
  }
  .page-lien-ket-doi-tac__hero-content {
    padding: 20px 15px;
  }
  .page-lien-ket-doi-tac__main-title {
    font-size: clamp(1.8rem, 7vw, 2.5rem);
  }
  .page-lien-ket-doi-tac__description {
    font-size: 1rem;
  }
  .page-lien-ket-doi-tac__cta-buttons {
    flex-direction: column;
    gap: 15px;
  }
  .page-lien-ket-doi-tac__btn-primary,
  .page-lien-ket-doi-tac__btn-secondary,
  .page-lien-ket-doi-tac a[class*="button"],
  .page-lien-ket-doi-tac a[class*="btn"] {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    padding-left: 15px;
    padding-right: 15px;
  }
  .page-lien-ket-doi-tac__cta-buttons,
  .page-lien-ket-doi-tac__button-group,
  .page-lien-ket-doi-tac__btn-container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    flex-wrap: wrap !important;
    gap: 10px;
    display: flex;
    flex-direction: column; /* Ensure vertical stacking on mobile */
  }
  .page-lien-ket-doi-tac__section {
    padding: 40px 0;
  }
  .page-lien-ket-doi-tac__container {
    padding: 0 15px; /* Adjust container padding for mobile */
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }
  .page-lien-ket-doi-tac__section-title {
    font-size: clamp(1.5rem, 6vw, 2rem);
  }
  .page-lien-ket-doi-tac__section-intro {
    font-size: 0.95rem;
    margin-bottom: 30px;
  }
  .page-lien-ket-doi-tac__benefits-grid,
  .page-lien-ket-doi-tac__products-grid,
  .page-lien-ket-doi-tac__process-steps,
  .page-lien-ket-doi-tac__support-grid {
    grid-template-columns: 1fr; /* Single column layout for most grids */
    gap: 20px;
  }
  .page-lien-ket-doi-tac__benefit-card,
  .page-lien-ket-doi-tac__product-card,
  .page-lien-ket-doi-tac__step-card,
  .page-lien-ket-doi-tac__support-item {
    padding: 20px;
    min-width: unset;
    max-width: 100%;
  }
  .page-lien-ket-doi-tac img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-lien-ket-doi-tac__faq-qtext {
    font-size: 1rem;
  }
  details.page-lien-ket-doi-tac__faq-item summary.page-lien-ket-doi-tac__faq-question {
    padding: 15px;
  }
  .page-lien-ket-doi-tac__faq-answer {
    padding: 0 15px 15px;
  }
}