.page-khuyen-mai {
  font-family: 'Arial', sans-serif;
  color: #333333;
  background-color: #F5F7FA;
}

.page-khuyen-mai__container {
  max-width: 1170px;
  margin: 0 auto;
  padding: 0 16px;
  box-sizing: border-box;
}

.page-khuyen-mai__main-banner-section {
  padding-top: 10px; /* Small top padding, body handles header offset */
  padding-bottom: 60px;
  text-align: center;
  background: linear-gradient(180deg, #F5F7FA 0%, #E0E0E0 100%); /* Subtle gradient background */
}

.page-khuyen-mai__content-wrapper {
  max-width: 800px;
  margin: 0 auto;
}

.page-khuyen-mai__main-title {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 700;
  color: #E53935;
  margin-bottom: 20px;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.page-khuyen-mai__description {
  font-size: 1.15rem;
  line-height: 1.6;
  margin-bottom: 30px;
  color: #333333;
}

.page-khuyen-mai__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

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

.page-khuyen-mai__btn-primary {
  background: linear-gradient(180deg, #FF5A4F 0%, #E53935 100%);
  color: #ffffff;
  border: 2px solid transparent;
}

.page-khuyen-mai__btn-primary:hover {
  background: linear-gradient(180deg, #E53935 0%, #FF5A4F 100%);
  box-shadow: 0 6px 15px rgba(229, 57, 53, 0.4);
}

.page-khuyen-mai__btn-secondary {
  background: #ffffff;
  color: #E53935;
  border: 2px solid #E53935;
}

.page-khuyen-mai__btn-secondary:hover {
  background: #E53935;
  color: #ffffff;
  box-shadow: 0 6px 15px rgba(229, 57, 53, 0.2);
}

.page-khuyen-mai__promo-list-section,
.page-khuyen-mai__how-to-claim-section,
.page-khuyen-mai__terms-conditions-section,
.page-khuyen-mai__faq-section,
.page-khuyen-mai__cta-bottom-section {
  padding: 60px 0;
}

.page-khuyen-mai__section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: #E53935;
  text-align: center;
  margin-bottom: 25px;
  line-height: 1.3;
}

.page-khuyen-mai__section-description {
  font-size: 1.05rem;
  line-height: 1.6;
  text-align: center;
  max-width: 900px;
  margin: 0 auto 40px;
  color: #333333;
}

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

.page-khuyen-mai__promo-card {
  background: #FFFFFF;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  color: #333333;
}

.page-khuyen-mai__promo-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.page-khuyen-mai__promo-card-media {
  width: 100%;
  height: 220px;
  overflow: hidden;
}

.page-khuyen-mai__promo-card-media img {
  width: 100%;
  height: 100%;
  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: 1.4rem;
  font-weight: 600;
  margin-bottom: 15px;
  line-height: 1.4;
}

.page-khuyen-mai__promo-card-title a {
  color: #E53935;
  text-decoration: none;
  transition: color 0.3s ease;
}

.page-khuyen-mai__promo-card-title a:hover {
  color: #FF5A4F;
}

.page-khuyen-mai__promo-card-text {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.page-khuyen-mai__read-more-btn {
  display: inline-block;
  padding: 10px 20px;
  background: #FF5A4F;
  color: #ffffff;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: background 0.3s ease;
  align-self: flex-start;
}

.page-khuyen-mai__read-more-btn:hover {
  background: #E53935;
}

.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-item {
  background: #FFFFFF;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  padding: 30px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  color: #333333;
}

.page-khuyen-mai__step-icon {
  width: 120px;
  height: 120px;
  margin-bottom: 20px;
  border-radius: 50%;
  overflow: hidden;
  background-color: #F5F7FA;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.page-khuyen-mai__step-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  display: block;
}

.page-khuyen-mai__step-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: #E53935;
  margin-bottom: 15px;
}

.page-khuyen-mai__step-text {
  font-size: 1rem;
  line-height: 1.6;
}

.page-khuyen-mai__terms-list {
  list-style: disc;
  margin: 0 auto;
  padding-left: 25px;
  max-width: 900px;
  font-size: 1rem;
  line-height: 1.8;
  color: #333333;
}

.page-khuyen-mai__terms-list li {
  margin-bottom: 10px;
}

.page-khuyen-mai__faq-list {
  max-width: 900px;
  margin: 0 auto;
}

.page-khuyen-mai__faq-item {
  background: #FFFFFF;
  border: 1px solid #E0E0E0;
  border-radius: 8px;
  margin-bottom: 15px;
  overflow: hidden;
  color: #333333;
}

.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: #333333;
  cursor: pointer;
  background-color: #F5F7FA;
  border-bottom: 1px solid #E0E0E0;
  user-select: none;
  list-style: none;
}

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

.page-khuyen-mai__faq-item[open] .page-khuyen-mai__faq-question {
  border-bottom: 1px solid #E0E0E0;
}

.page-khuyen-mai__faq-toggle {
  font-size: 1.5rem;
  line-height: 1;
  transition: transform 0.3s ease;
  color: #E53935;
}

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

.page-khuyen-mai__faq-answer {
  padding: 15px 25px 20px;
  font-size: 1rem;
  line-height: 1.7;
  color: #555555;
}

.page-khuyen-mai__cta-bottom-section {
  text-align: center;
  background-color: #E53935;
  color: #ffffff;
  padding: 80px 0;
}

.page-khuyen-mai__cta-bottom-section .page-khuyen-mai__section-title {
  color: #ffffff;
}

.page-khuyen-mai__cta-bottom-section .page-khuyen-mai__section-description {
  color: #f0f0f0;
}

.page-khuyen-mai__cta-bottom-section .page-khuyen-mai__btn-primary {
  background: #ffffff;
  color: #E53935;
  border: 2px solid #ffffff;
}

.page-khuyen-mai__cta-bottom-section .page-khuyen-mai__btn-primary:hover {
  background: #FF5A4F;
  color: #ffffff;
  border-color: #FF5A4F;
}

.page-khuyen-mai__cta-bottom-section .page-khuyen-mai__btn-secondary {
  background: transparent;
  color: #ffffff;
  border: 2px solid #ffffff;
}

.page-khuyen-mai__cta-bottom-section .page-khuyen-mai__btn-secondary:hover {
  background: #ffffff;
  color: #E53935;
}

/* --- Responsive Styles --- */
@media (max-width: 1024px) {
  .page-khuyen-mai__main-title {
    font-size: clamp(2rem, 4.5vw, 3rem);
  }
  .page-khuyen-mai__description {
    font-size: 1.1rem;
  }
  .page-khuyen-mai__section-title {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
  }
  .page-khuyen-mai__promo-cards {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
  .page-khuyen-mai__promo-card-media {
    height: 180px;
  }
  .page-khuyen-mai__promo-card-title {
    font-size: 1.3rem;
  }
  .page-khuyen-mai__steps-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }
  .page-khuyen-mai__step-icon {
    width: 100px;
    height: 100px;
  }
  .page-khuyen-mai__step-title {
    font-size: 1.2rem;
  }
  .page-khuyen-mai__faq-question {
    font-size: 1.05rem;
  }
}

@media (max-width: 768px) {
  .page-khuyen-mai__main-banner-section {
    padding-top: 10px !important;
    padding-bottom: 40px;
  }
  .page-khuyen-mai__main-title {
    font-size: clamp(1.8rem, 6vw, 2.5rem);
    margin-bottom: 15px;
  }
  .page-khuyen-mai__description {
    font-size: 1rem;
    margin-bottom: 25px;
  }
  .page-khuyen-mai__cta-buttons {
    flex-direction: column;
    gap: 15px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    padding: 0 15px;
  }
  .page-khuyen-mai__btn-primary,
  .page-khuyen-mai__btn-secondary {
    width: 100% !important;
    max-width: 100% !important;
    padding: 12px 20px;
    font-size: 1rem;
  }

  .page-khuyen-mai__promo-list-section,
  .page-khuyen-mai__how-to-claim-section,
  .page-khuyen-mai__terms-conditions-section,
  .page-khuyen-mai__faq-section,
  .page-khuyen-mai__cta-bottom-section {
    padding: 40px 0;
  }
  .page-khuyen-mai__section-title {
    font-size: clamp(1.5rem, 5vw, 2rem);
    margin-bottom: 20px;
  }
  .page-khuyen-mai__section-description {
    font-size: 0.95rem;
    margin-bottom: 30px;
    padding: 0 10px;
  }
  .page-khuyen-mai__promo-cards {
    grid-template-columns: 1fr;
    gap: 25px;
    padding: 0 15px;
  }
  .page-khuyen-mai__promo-card-media {
    height: 160px;
  }
  .page-khuyen-mai__promo-card-title {
    font-size: 1.2rem;
  }
  .page-khuyen-mai__promo-card-text {
    font-size: 0.95rem;
  }
  .page-khuyen-mai__read-more-btn {
    font-size: 0.9rem;
    padding: 8px 18px;
  }

  .page-khuyen-mai__steps-grid {
    grid-template-columns: 1fr;
    gap: 25px;
    padding: 0 15px;
  }
  .page-khuyen-mai__step-item {
    padding: 25px;
  }
  .page-khuyen-mai__step-icon {
    width: 90px;
    height: 90px;
    margin-bottom: 15px;
  }
  .page-khuyen-mai__step-title {
    font-size: 1.1rem;
  }
  .page-khuyen-mai__step-text {
    font-size: 0.95rem;
  }

  .page-khuyen-mai__terms-list {
    font-size: 0.95rem;
    padding-left: 20px;
    margin: 0 15px;
  }
  .page-khuyen-mai__terms-list li {
    margin-bottom: 8px;
  }

  .page-khuyen-mai__faq-list {
    margin: 0 15px;
  }
  .page-khuyen-mai__faq-question {
    padding: 15px 20px;
    font-size: 1rem;
  }
  .page-khuyen-mai__faq-answer {
    padding: 12px 20px 15px;
    font-size: 0.95rem;
  }

  .page-khuyen-mai__cta-bottom-section {
    padding: 50px 0;
  }

  /* General image and container responsiveness */
  .page-khuyen-mai img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-khuyen-mai__container,
  .page-khuyen-mai__promo-card,
  .page-khuyen-mai__step-item,
  .page-khuyen-mai__faq-item {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow: hidden;
  }
}