.page-khuyen-mai {
  color: #F3F8FF;
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
}

.page-khuyen-mai__container {
  max-width: 1150px;
  margin: 0 auto;
  padding: 0 20px;
  box-sizing: border-box;
}

.page-khuyen-mai__hero-section {
  position: relative;
  padding-top: 10px; /* Small top padding, body handles header offset */
  padding-bottom: 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background-color: #08162B;
}

.page-khuyen-mai__hero-image-wrapper {
  width: 100%;
  max-height: 500px;
  overflow: hidden;
  position: relative;
  margin-bottom: 40px;
}

.page-khuyen-mai__hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: 12px;
  opacity: 0.8;
}

.page-khuyen-mai__hero-content {
  max-width: 800px;
  position: relative;
  z-index: 1;
}

.page-khuyen-mai__main-title {
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  font-weight: 700;
  color: #F2C14E; /* Gold */
  margin-bottom: 15px;
  text-shadow: 0 0 10px rgba(79, 168, 255, 0.5);
}

.page-khuyen-mai__description {
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  color: #AFC4E8;
  margin-bottom: 30px;
}

.page-khuyen-mai__cta-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

.page-khuyen-mai__btn {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  cursor: pointer;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
  text-align: center;
}

.page-khuyen-mai__btn-primary {
  background: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
  color: #F3F8FF;
  border: none;
  box-shadow: 0 4px 15px rgba(43, 115, 246, 0.4);
}

.page-khuyen-mai__btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(43, 115, 246, 0.6);
}

.page-khuyen-mai__btn-secondary {
  background: #10233F;
  color: #F2C14E;
  border: 2px solid #244D84;
}

.page-khuyen-mai__btn-secondary:hover {
  background-color: #1B3357;
  color: #F3F8FF;
  border-color: #4FA8FF;
  transform: translateY(-2px);
}

.page-khuyen-mai__section-title {
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  font-weight: 700;
  color: #F2C14E;
  text-align: center;
  margin-bottom: 40px;
  text-shadow: 0 0 8px rgba(79, 168, 255, 0.3);
}

.page-khuyen-mai__overview-section,
.page-khuyen-mai__how-to-claim-section,
.page-khuyen-mai__terms-section,
.page-khuyen-mai__why-choose-section,
.page-khuyen-mai__faq-section,
.page-khuyen-mai__call-to-action-section {
  padding: 60px 0;
  background-color: #08162B;
}

.page-khuyen-mai__text-block {
  font-size: 1.05rem;
  color: #AFC4E8;
  margin-bottom: 20px;
  text-align: justify;
}

.page-khuyen-mai__text-block a {
  color: #F2C14E;
  text-decoration: none;
  font-weight: 600;
}

.page-khuyen-mai__text-block a:hover {
  text-decoration: underline;
}

.page-khuyen-mai__promo-grid-section {
  padding: 80px 0;
  background: linear-gradient(180deg, #08162B 0%, #10233F 100%);
}

.page-khuyen-mai__promo-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.page-khuyen-mai__promo-card {
  background-color: #10233F;
  border: 1px solid #244D84;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}

.page-khuyen-mai__promo-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4), 0 0 15px #4FA8FF;
}

.page-khuyen-mai__promo-card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.page-khuyen-mai__promo-card-content {
  padding: 25px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.page-khuyen-mai__promo-card-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: #F3F8FF;
  margin-bottom: 15px;
}

.page-khuyen-mai__promo-card-description {
  font-size: 0.95rem;
  color: #AFC4E8;
  margin-bottom: 20px;
  flex-grow: 1;
}

.page-khuyen-mai__btn-small {
  padding: 10px 20px;
  font-size: 0.9rem;
  align-self: flex-start;
}

.page-khuyen-mai__steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-khuyen-mai__step-card {
  background-color: #10233F;
  border: 1px solid #244D84;
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__step-title {
  font-size: 1.4rem;
  font-weight: 600;
  color: #F2C14E;
  margin-bottom: 15px;
}

.page-khuyen-mai__step-description {
  font-size: 0.95rem;
  color: #AFC4E8;
}

.page-khuyen-mai__step-description a {
  color: #4FA8FF;
  text-decoration: none;
  font-weight: 600;
}

.page-khuyen-mai__step-description a:hover {
  text-decoration: underline;
}

.page-khuyen-mai__terms-list {
  list-style: none;
  padding: 0;
  margin-top: 30px;
}

.page-khuyen-mai__terms-list li {
  background-color: #10233F;
  border: 1px solid #1B3357;
  border-radius: 8px;
  padding: 15px 20px;
  margin-bottom: 15px;
  font-size: 1rem;
  color: #F3F8FF;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.page-khuyen-mai__list-icon {
  color: #F2C14E;
  font-weight: bold;
  font-size: 1.2rem;
  line-height: 1;
}

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

.page-khuyen-mai__feature-card {
  background-color: #10233F;
  border: 1px solid #244D84;
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__feature-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: #F2C14E;
  margin-bottom: 10px;
}

.page-khuyen-mai__feature-description {
  font-size: 0.95rem;
  color: #AFC4E8;
}

.page-khuyen-mai__faq-list {
  margin-top: 40px;
}

.page-khuyen-mai__faq-item {
  background-color: #10233F;
  border: 1px solid #244D84;
  border-radius: 8px;
  margin-bottom: 15px;
  overflow: hidden;
}

.page-khuyen-mai__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  font-size: 1.15rem;
  font-weight: 600;
  color: #F3F8FF;
  cursor: pointer;
  background-color: #113B7A;
  user-select: none;
  list-style: none;
}

.page-khuyen-mai__faq-question::-webkit-details-marker {
  display: none;
}

.page-khuyen-mai__faq-toggle {
  font-size: 1.5rem;
  line-height: 1;
  color: #F2C14E;
  transition: transform 0.3s ease;
}

.page-khuyen-mai__faq-item[open] .page-khuyen-mai__faq-toggle {
  transform: rotate(45deg);
}

.page-khuyen-mai__faq-answer {
  padding: 0 25px 20px;
  font-size: 1rem;
  color: #AFC4E8;
  line-height: 1.6;
}

.page-khuyen-mai__faq-answer p {
  margin-bottom: 0;
  color: #AFC4E8;
}

/* Responsive styles */
@media (max-width: 1024px) {
  .page-khuyen-mai__hero-image-wrapper {
    max-height: 400px;
  }

  .page-khuyen-mai__main-title {
    font-size: clamp(2rem, 3.5vw, 3rem);
  }

  .page-khuyen-mai__description {
    font-size: clamp(0.95rem, 1.4vw, 1.15rem);
  }

  .page-khuyen-mai__section-title {
    font-size: clamp(1.6rem, 2.5vw, 2.4rem);
  }

  .page-khuyen-mai__promo-card-image {
    height: 180px;
  }

  .page-khuyen-mai__promo-card-title {
    font-size: 1.4rem;
  }

  .page-khuyen-mai__step-title {
    font-size: 1.3rem;
  }

  .page-khuyen-mai__feature-title {
    font-size: 1.2rem;
  }

  .page-khuyen-mai__faq-question {
    font-size: 1.1rem;
  }
}

@media (max-width: 768px) {
  .page-khuyen-mai__container {
    padding-left: 15px !important;
    padding-right: 15px !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-khuyen-mai__hero-section {
    padding-top: 10px !important;
    padding-bottom: 40px;
  }

  .page-khuyen-mai__hero-image-wrapper {
    max-height: 300px;
    margin-bottom: 30px;
  }

  .page-khuyen-mai__hero-image {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }

  .page-khuyen-mai__main-title {
    font-size: 2.2rem;
    margin-bottom: 10px;
  }

  .page-khuyen-mai__description {
    font-size: 1rem;
    margin-bottom: 25px;
  }

  .page-khuyen-mai__cta-buttons {
    flex-direction: column;
    gap: 10px;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-khuyen-mai__btn {
    padding: 12px 20px;
    font-size: 1rem;
    width: 100% !important;
    max-width: 100% !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    box-sizing: border-box !important;
  }

  .page-khuyen-mai__section-title {
    font-size: 2rem;
    margin-bottom: 30px;
  }

  .page-khuyen-mai__overview-section,
  .page-khuyen-mai__how-to-claim-section,
  .page-khuyen-mai__terms-section,
  .page-khuyen-mai__why-choose-section,
  .page-khuyen-mai__faq-section,
  .page-khuyen-mai__call-to-action-section {
    padding: 40px 0;
  }

  .page-khuyen-mai__text-block {
    font-size: 0.95rem;
  }

  .page-khuyen-mai__promo-cards {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-khuyen-mai__promo-card-image {
    height: 160px;
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }

  .page-khuyen-mai__promo-card-content {
    padding: 20px;
  }

  .page-khuyen-mai__promo-card-title {
    font-size: 1.3rem;
  }

  .page-khuyen-mai__promo-card-description {
    font-size: 0.9rem;
  }

  .page-khuyen-mai__btn-small {
    align-self: stretch;
  }

  .page-khuyen-mai__steps-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 30px;
  }

  .page-khuyen-mai__step-card {
    padding: 25px;
  }

  .page-khuyen-mai__step-title {
    font-size: 1.25rem;
  }

  .page-khuyen-mai__step-description {
    font-size: 0.9rem;
  }

  .page-khuyen-mai__terms-list {
    margin-top: 25px;
  }

  .page-khuyen-mai__terms-list li {
    padding: 12px 15px;
    font-size: 0.95rem;
  }

  .page-khuyen-mai__feature-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 30px;
  }

  .page-khuyen-mai__feature-card {
    padding: 25px;
  }

  .page-khuyen-mai__feature-title {
    font-size: 1.15rem;
  }

  .page-khuyen-mai__feature-description {
    font-size: 0.9rem;
  }

  .page-khuyen-mai__faq-list {
    margin-top: 30px;
  }

  .page-khuyen-mai__faq-question {
    padding: 15px 20px;
    font-size: 1rem;
  }

  .page-khuyen-mai__faq-answer {
    padding: 0 20px 15px;
    font-size: 0.95rem;
  }
  
  .page-khuyen-mai img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }

  .page-khuyen-mai__section,
  .page-khuyen-mai__card,
  .page-khuyen-mai__container,
  .page-khuyen-mai__promo-card,
  .page-khuyen-mai__step-card,
  .page-khuyen-mai__feature-card,
  .page-khuyen-mai__faq-item {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow: hidden;
  }
}