.page-khuyen-mai {
  --primary-color: #FF8C1A;
  --secondary-color: #FFA53A;
  --background-color: #0D0E12;
  --card-bg-color: #17191F;
  --text-main-color: #FFF3E6;
  --border-color: #A84F0C;
  --glow-color: #FFB04D;
  --deep-orange: #D96800;
  color: var(--text-main-color);
  background-color: var(--background-color);
  font-family: Arial, sans-serif;
  line-height: 1.6;
}

.page-khuyen-mai__hero-section {
  padding-top: 10px; /* Small top padding, header offset handled by body */
  padding-bottom: 60px;
  background-color: var(--background-color);
  position: relative;
  overflow: hidden;
}

.page-khuyen-mai__hero-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: 40px 20px;
}

.page-khuyen-mai__hero-content {
  flex: 1 1 50%;
  min-width: 300px;
  text-align: left;
}

.page-khuyen-mai__hero-title {
  font-size: 3.2em;
  font-weight: 700;
  color: var(--text-main-color);
  margin-bottom: 20px;
  line-height: 1.2;
  max-width: 600px;
}

.page-khuyen-mai__hero-description {
  font-size: 1.1em;
  color: var(--text-main-color);
  margin-bottom: 30px;
  max-width: 600px;
}

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

.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.05em;
  cursor: pointer;
  transition: all 0.3s ease;
  white-space: normal;
  word-wrap: break-word;
  box-sizing: border-box;
}

.page-khuyen-mai__btn-primary {
  background: linear-gradient(180deg, var(--secondary-color) 0%, var(--deep-orange) 100%);
  color: #ffffff;
  border: 2px solid transparent;
  box-shadow: 0 4px 15px rgba(255, 140, 26, 0.4);
}

.page-khuyen-mai__btn-primary:hover {
  background: linear-gradient(180deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  box-shadow: 0 6px 20px rgba(255, 140, 26, 0.6);
  transform: translateY(-2px);
}

.page-khuyen-mai__btn-secondary {
  background-color: transparent;
  color: var(--secondary-color);
  border: 2px solid var(--secondary-color);
}

.page-khuyen-mai__btn-secondary:hover {
  background-color: var(--secondary-color);
  color: #ffffff;
  transform: translateY(-2px);
}

.page-khuyen-mai__hero-image {
  flex: 1 1 40%;
  min-width: 300px;
  text-align: center;
}

.page-khuyen-mai__hero-side-image {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
  display: block;
  margin: 0 auto;
}

.page-khuyen-mai__content-area {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
  box-sizing: border-box;
}

.page-khuyen-mai__section-title {
  font-size: 2.5em;
  font-weight: 700;
  color: var(--primary-color);
  text-align: center;
  margin-bottom: 25px;
  text-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__section-description {
  font-size: 1.1em;
  color: var(--text-main-color);
  text-align: center;
  max-width: 800px;
  margin: 0 auto 50px;
}

.page-khuyen-mai__promo-overview-section,
.page-khuyen-mai__promo-types-section,
.page-khuyen-mai__guide-section,
.page-khuyen-mai__terms-section,
.page-khuyen-mai__faq-section,
.page-khuyen-mai__final-cta-section {
  padding: 60px 0;
  background-color: var(--background-color);
}

.page-khuyen-mai__promo-types-section {
  background-color: var(--card-bg-color);
}

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

.page-khuyen-mai__promo-card {
  background-color: var(--card-bg-color);
  border-radius: 12px;
  padding: 25px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  border: 1px solid var(--border-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-khuyen-mai__promo-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
}

.page-khuyen-mai__card-image {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin-bottom: 20px;
  display: block;
}

.page-khuyen-mai__card-title {
  font-size: 1.6em;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 15px;
}

.page-khuyen-mai__card-text {
  font-size: 1em;
  color: var(--text-main-color);
  margin-bottom: 25px;
  flex-grow: 1;
}

.page-khuyen-mai__guide-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 25px;
  margin-bottom: 50px;
}

.page-khuyen-mai__step-card {
  background-color: var(--card-bg-color);
  border-radius: 10px;
  padding: 25px;
  text-align: center;
  box-shadow: 0 3px 15px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
}

.page-khuyen-mai__step-number {
  font-size: 2.5em;
  font-weight: 800;
  color: var(--secondary-color);
  margin-bottom: 10px;
  display: block;
  line-height: 1;
}

.page-khuyen-mai__step-title {
  font-size: 1.4em;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 10px;
}

.page-khuyen-mai__step-text {
  font-size: 0.95em;
  color: var(--text-main-color);
}

.page-khuyen-mai__guide-image {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  margin: 0 auto 50px;
  display: block;
}

.page-khuyen-mai__cta-section {
  text-align: center;
  margin-top: 40px;
}

.page-khuyen-mai__terms-section {
  background-color: var(--card-bg-color);
}

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

.page-khuyen-mai__faq-item {
  background-color: var(--card-bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 15px;
  overflow: hidden;
  color: var(--text-main-color);
}

.page-khuyen-mai__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  font-size: 1.1em;
  font-weight: 600;
  color: var(--primary-color);
  cursor: pointer;
  background-color: var(--card-bg-color);
  border-bottom: 1px solid transparent; /* default */
  transition: background-color 0.3s ease;
  list-style: none; /* For details tag */
}

.page-khuyen-mai__faq-item[open] > .page-khuyen-mai__faq-question {
  background-color: var(--deep-orange);
  color: #ffffff;
  border-bottom-color: var(--border-color);
}

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

.page-khuyen-mai__faq-qtext {
  flex-grow: 1;
}

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

.page-khuyen-mai__faq-item[open] .page-khuyen-mai__faq-toggle {
  color: #ffffff;
}

.page-khuyen-mai__faq-answer {
  padding: 0 25px 20px;
  font-size: 1em;
  color: var(--text-main-color);
}

.page-khuyen-mai__final-cta-section {
  background-color: var(--background-color);
  text-align: center;
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .page-khuyen-mai__hero-title {
    font-size: 2.8em;
  }
  .page-khuyen-mai__section-title {
    font-size: 2.2em;
  }
  .page-khuyen-mai__hero-container {
    flex-direction: column;
    text-align: center;
  }
  .page-khuyen-mai__hero-content {
    order: 2; /* Content below image */
  }
  .page-khuyen-mai__hero-image {
    order: 1; /* Image above content */
  }
  .page-khuyen-mai__cta-buttons {
    justify-content: center;
  }
  .page-khuyen-mai__promo-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
  .page-khuyen-mai__guide-steps {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
}

@media (max-width: 768px) {
  .page-khuyen-mai {
    font-size: 15px;
  }
  .page-khuyen-mai__hero-section {
    padding-top: 10px !important;
    padding-bottom: 40px;
  }
  .page-khuyen-mai__hero-container,
  .page-khuyen-mai__content-area {
    padding: 20px 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }
  .page-khuyen-mai__hero-title {
    font-size: 2.2em;
    margin-bottom: 15px;
  }
  .page-khuyen-mai__hero-description {
    font-size: 1em;
    margin-bottom: 25px;
  }
  .page-khuyen-mai__cta-buttons {
    flex-direction: column;
    gap: 10px;
  }
  .page-khuyen-mai__btn-primary,
  .page-khuyen-mai__btn-secondary {
    max-width: 100% !important;
    width: 100% !important;
    padding: 12px 20px;
    font-size: 1em;
    white-space: normal !important;
    word-wrap: break-word !important;
    box-sizing: border-box !important;
  }
  .page-khuyen-mai__hero-side-image {
    max-width: 100% !important;
    height: auto !important;
  }

  /* Section titles and descriptions */
  .page-khuyen-mai__section-title {
    font-size: 1.8em;
    margin-bottom: 20px;
  }
  .page-khuyen-mai__section-description {
    font-size: 0.95em;
    margin-bottom: 30px;
  }

  /* Promo Cards */
  .page-khuyen-mai__promo-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .page-khuyen-mai__promo-card {
    padding: 20px;
  }
  .page-khuyen-mai__card-image {
    max-width: 100% !important;
    height: auto !important;
  }
  .page-khuyen-mai__card-title {
    font-size: 1.4em;
  }
  .page-khuyen-mai__card-text {
    font-size: 0.9em;
  }

  /* Guide Steps */
  .page-khuyen-mai__guide-steps {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .page-khuyen-mai__step-card {
    padding: 20px;
  }
  .page-khuyen-mai__step-number {
    font-size: 2em;
  }
  .page-khuyen-mai__step-title {
    font-size: 1.2em;
  }
  .page-khuyen-mai__step-text {
    font-size: 0.85em;
  }
  .page-khuyen-mai__guide-image {
    max-width: 100% !important;
    height: auto !important;
  }

  /* FAQ */
  .page-khuyen-mai__faq-question {
    padding: 15px 20px;
    font-size: 1em;
  }
  .page-khuyen-mai__faq-answer {
    padding: 0 20px 15px;
    font-size: 0.9em;
  }

  /* General image responsiveness */
  .page-khuyen-mai img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    box-sizing: border-box !important;
  }
}