:root {
  --color-primary: #C61F1F;
  --color-secondary: #E53030;
  --color-card-bg: #2A1212;
  --color-background-main: #140C0C;
  --color-text-main: #FFF1E8;
  --color-border: #6A1E1E;
  --color-gold: #F3C54D;
  --color-deep-red: #7E0D0D;
  --btn-gradient: linear-gradient(180deg, #FFB04A 0%, #D86A14 100%);
}

.page-khuyen-mai {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--color-text-main);
  background-color: var(--color-background-main);
  padding-bottom: 40px;
}

.page-khuyen-mai__hero-section {
  position: relative;
  text-align: center;
  padding-top: 10px; /* Small top padding, body handles header offset */
  margin-bottom: 40px;
  background-color: var(--color-background-main);
  overflow: hidden;
}

.page-khuyen-mai__hero-image-wrapper {
  width: 100%;
  max-height: 600px;
  overflow: hidden;
}

.page-khuyen-mai__hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  object-position: center;
}

.page-khuyen-mai__hero-content {
  padding: 30px 20px;
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.page-khuyen-mai__main-title {
  font-size: clamp(2em, 3.5vw, 3em);
  color: var(--color-gold);
  margin-bottom: 15px;
  font-weight: bold;
  line-height: 1.2;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.page-khuyen-mai__hero-description {
  font-size: 1.1em;
  color: var(--color-text-main);
  margin-bottom: 30px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

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

.page-khuyen-mai__cta-buttons--bottom {
  margin-top: 40px;
}

.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary,
.page-khuyen-mai__btn-card,
.page-khuyen-mai__btn-step {
  display: inline-block;
  padding: 12px 25px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
  cursor: pointer;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-khuyen-mai__btn-primary {
  background: var(--btn-gradient);
  color: #ffffff;
  border: 2px solid transparent;
  box-shadow: 0 4px 15px rgba(255, 176, 74, 0.4);
}

.page-khuyen-mai__btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 176, 74, 0.6);
}

.page-khuyen-mai__btn-secondary {
  background-color: transparent;
  color: var(--color-gold);
  border: 2px solid var(--color-gold);
  box-shadow: 0 4px 15px rgba(243, 197, 77, 0.2);
}

.page-khuyen-mai__btn-secondary:hover {
  background-color: var(--color-gold);
  color: var(--color-background-main);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(243, 197, 77, 0.4);
}

.page-khuyen-mai__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.page-khuyen-mai__intro-section,
.page-khuyen-mai__promo-types-section,
.page-khuyen-mai__how-to-get-section,
.page-khuyen-mai__terms-section,
.page-khuyen-mai__why-choose-section,
.page-khuyen-mai__faq-section,
.page-khuyen-mai__conclusion-section {
  padding: 40px 0;
  margin-bottom: 20px;
  background-color: var(--color-background-main);
}

.page-khuyen-mai__section-title {
  font-size: 2.2em;
  color: var(--color-gold);
  text-align: center;
  margin-bottom: 30px;
  font-weight: bold;
  position: relative;
  padding-bottom: 10px;
}

.page-khuyen-mai__section-title::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--btn-gradient);
  border-radius: 2px;
}

.page-khuyen-mai__text-block {
  font-size: 1.05em;
  color: var(--color-text-main);
  margin-bottom: 20px;
  text-align: justify;
}

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

.page-khuyen-mai__promo-card {
  background-color: var(--color-card-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
}

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

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

.page-khuyen-mai__card-title {
  font-size: 1.4em;
  color: var(--color-gold);
  margin-bottom: 10px;
  font-weight: bold;
}

.page-khuyen-mai__card-description {
  font-size: 0.95em;
  color: var(--color-text-main);
  margin-bottom: 20px;
  flex-grow: 1;
}

.page-khuyen-mai__btn-card {
  margin-top: auto;
  text-align: center;
  background: var(--btn-gradient);
  color: #ffffff;
  border: none;
}

.page-khuyen-mai__btn-card:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

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

.page-khuyen-mai__step-card {
  background-color: var(--color-card-bg);
  border-radius: 12px;
  padding: 30px 20px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--color-border);
}

.page-khuyen-mai__step-icon {
  width: 100px;
  height: 100px;
  object-fit: contain;
  margin-bottom: 20px;
  filter: drop-shadow(0 0 5px var(--color-gold));
}

.page-khuyen-mai__step-title {
  font-size: 1.3em;
  color: var(--color-gold);
  margin-bottom: 10px;
  font-weight: bold;
}

.page-khuyen-mai__step-description {
  font-size: 0.95em;
  color: var(--color-text-main);
  margin-bottom: 25px;
}

.page-khuyen-mai__btn-step {
  background-color: var(--color-deep-red);
  color: #ffffff;
  border: none;
  padding: 10px 20px;
}

.page-khuyen-mai__btn-step:hover {
  background-color: var(--color-primary);
}

.page-khuyen-mai__terms-list,
.page-khuyen-mai__why-list {
  list-style: none;
  padding: 0;
  margin-top: 20px;
}

.page-khuyen-mai__terms-list li,
.page-khuyen-mai__why-list li {
  background-color: var(--color-card-bg);
  margin-bottom: 15px;
  padding: 20px;
  border-radius: 10px;
  border-left: 5px solid var(--color-gold);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__terms-list li p,
.page-khuyen-mai__why-list li p {
  margin: 0;
  color: var(--color-text-main);
  font-size: 1em;
}

.page-khuyen-mai__terms-list li strong {
  color: var(--color-gold);
}

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

.page-khuyen-mai__faq-item {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  margin-bottom: 15px;
  overflow: hidden;
}

.page-khuyen-mai__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  font-size: 1.1em;
  font-weight: bold;
  color: var(--color-gold);
  cursor: pointer;
  background-color: var(--color-card-bg);
  transition: background-color 0.3s ease;
  list-style: none;
}

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

.page-khuyen-mai__faq-question:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

.page-khuyen-mai__faq-toggle {
  font-size: 1.5em;
  line-height: 1;
  margin-left: 15px;
  color: var(--color-gold);
}

.page-khuyen-mai__faq-answer {
  padding: 0 25px 20px;
  font-size: 0.95em;
  color: var(--color-text-main);
  line-height: 1.7;
}

.page-khuyen-mai__faq-answer p {
  margin: 0;
}

.page-khuyen-mai__conclusion-section {
  text-align: center;
}

.page-khuyen-mai a {
  color: var(--color-gold);
  text-decoration: none;
}

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

/* Responsive Styles */
@media (max-width: 1024px) {
  .page-khuyen-mai__hero-image-wrapper {
    max-height: 500px;
  }

  .page-khuyen-mai__main-title {
    font-size: 2.5em;
  }

  .page-khuyen-mai__section-title {
    font-size: 2em;
  }

  .page-khuyen-mai__promo-grid,
  .page-khuyen-mai__steps-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
  }
}

@media (max-width: 768px) {
  .page-khuyen-mai {
    font-size: 16px;
    line-height: 1.6;
  }

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

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

  .page-khuyen-mai__hero-image {
    object-fit: contain !important; /* Mobile hero image must contain, not cover */
    aspect-ratio: unset !important;
    max-height: none !important;
  }

  .page-khuyen-mai__hero-content {
    padding: 20px 15px;
  }

  .page-khuyen-mai__main-title {
    font-size: 1.8em;
    margin-bottom: 10px;
  }

  .page-khuyen-mai__hero-description {
    font-size: 1em;
    margin-bottom: 20px;
  }

  .page-khuyen-mai__cta-buttons {
    flex-direction: column;
    gap: 15px;
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-khuyen-mai__cta-button,
  .page-khuyen-mai__btn-primary,
  .page-khuyen-mai__btn-secondary,
  .page-khuyen-mai__btn-card,
  .page-khuyen-mai__btn-step,
  .page-khuyen-mai a[class*="button"],
  .page-khuyen-mai 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-khuyen-mai__cta-buttons,
  .page-khuyen-mai__button-group,
  .page-khuyen-mai__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;
  }

  .page-khuyen-mai__intro-section,
  .page-khuyen-mai__promo-types-section,
  .page-khuyen-mai__how-to-get-section,
  .page-khuyen-mai__terms-section,
  .page-khuyen-mai__why-choose-section,
  .page-khuyen-mai__faq-section,
  .page-khuyen-mai__conclusion-section {
    padding: 30px 0;
  }

  .page-khuyen-mai__container {
    padding: 0 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-khuyen-mai__section-title {
    font-size: 1.7em;
    margin-bottom: 20px;
  }

  .page-khuyen-mai__section-title::after {
    width: 60px;
  }

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

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

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

  .page-khuyen-mai__card-title {
    font-size: 1.2em;
  }

  .page-khuyen-mai__card-description {
    font-size: 0.9em;
  }

  .page-khuyen-mai__step-icon {
    width: 80px;
    height: 80px;
  }

  .page-khuyen-mai__step-title {
    font-size: 1.1em;
  }

  .page-khuyen-mai__terms-list li,
  .page-khuyen-mai__why-list li {
    padding: 15px;
  }

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

  .page-khuyen-mai__faq-answer {
    padding: 0 20px 15px;
  }

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