.page-khuyen-mai {
  --primary-color: #C91F17;
  --secondary-color: #E53935;
  --button-gradient: linear-gradient(180deg, #FFD86A 0%, #E6B800 100%);
  --card-bg: #D32F2F;
  --background-dark: #B71C1C;
  --text-main: #FFF5E1;
  --border-color: #F2B544;
  --glow-color: #FFCC66;
  --gold-color: #F4D34D;
  --deep-red: #7A0E0E;

  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  color: var(--text-main); /* Default text color for dark background */
  background-color: var(--background-dark); /* Page background from custom colors */
}

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

.page-khuyen-mai__hero-section {
  padding-top: 10px; /* Small top padding, body handles header offset */
  background-color: var(--deep-red);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 500px;
}

.page-khuyen-mai__hero-image {
  width: 100%;
  height: auto;
  display: block;
  max-width: 1200px;
  margin: 0 auto 20px auto;
  border-radius: 10px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.page-khuyen-mai__hero-content {
  position: relative;
  z-index: 10;
  padding: 20px;
  max-width: 800px;
}

.page-khuyen-mai__main-title {
  font-size: clamp(2.2em, 4vw, 3.5em);
  font-weight: 700;
  color: var(--gold-color);
  margin-bottom: 15px;
  line-height: 1.2;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.page-khuyen-mai__intro-text {
  font-size: 1.2em;
  color: var(--text-main);
  margin-bottom: 30px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

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

.page-khuyen-mai__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1em;
  transition: all 0.3s ease;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  max-width: 100%; /* Ensure button adapts to container */
  box-sizing: border-box;
  white-space: normal; /* Allow text wrapping */
  word-wrap: break-word;
}

.page-khuyen-mai__btn--primary {
  background: var(--button-gradient);
  color: var(--deep-red);
  border: 2px solid var(--gold-color);
}

.page-khuyen-mai__btn--primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
  filter: brightness(1.1);
}

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

.page-khuyen-mai__btn--secondary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
  background-color: var(--primary-color);
}

.page-khuyen-mai__section {
  padding: 60px 0;
  text-align: center;
}

.page-khuyen-mai__section--dark-bg {
  background-color: var(--background-dark);
  color: var(--text-main);
}

.page-khuyen-mai__section-title {
  font-size: 2.5em;
  color: var(--gold-color);
  margin-bottom: 40px;
  font-weight: 700;
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.4);
}

.page-khuyen-mai__paragraph {
  font-size: 1.1em;
  color: var(--text-main);
  max-width: 900px;
  margin: 0 auto 20px auto;
  line-height: 1.7;
}

.page-khuyen-mai__highlight {
  color: var(--gold-color);
  font-weight: 700;
}

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

.page-khuyen-mai__promo-card {
  background-color: var(--card-bg);
  border-radius: 10px;
  padding: 25px;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
  text-align: left;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  transition: transform 0.3s ease;
  border: 1px solid var(--border-color);
}

.page-khuyen-mai__promo-card:hover {
  transform: translateY(-5px);
}

.page-khuyen-mai__card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 20px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__card-title {
  font-size: 1.5em;
  color: var(--gold-color);
  margin-bottom: 10px;
  font-weight: 600;
}

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

.page-khuyen-mai__btn--small {
  padding: 10px 20px;
  font-size: 0.9em;
}

.page-khuyen-mai__section--steps {
  background-color: var(--deep-red);
}

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

.page-khuyen-mai__step-item {
  background-color: var(--card-bg);
  border-radius: 10px;
  padding: 30px;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
  text-align: center;
  border: 1px solid var(--border-color);
}

.page-khuyen-mai__step-icon {
  width: 60px;
  height: 60px;
  background: var(--button-gradient);
  color: var(--deep-red);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2em;
  font-weight: 700;
  margin: 0 auto 20px auto;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__step-title {
  font-size: 1.4em;
  color: var(--gold-color);
  margin-bottom: 15px;
  font-weight: 600;
}

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

.page-khuyen-mai__step-image {
  width: 100%;
  height: auto;
  max-height: 250px;
  object-fit: cover;
  border-radius: 8px;
  margin-top: 15px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__cta-wrapper {
  margin-top: 60px;
  text-align: center;
}

.page-khuyen-mai__btn--large {
  padding: 16px 40px;
  font-size: 1.2em;
}

.page-khuyen-mai__terms-list {
  list-style: none;
  padding: 0;
  margin-top: 40px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  text-align: left;
}

.page-khuyen-mai__terms-item {
  background-color: rgba(255, 255, 255, 0.08);
  border-left: 5px solid var(--gold-color);
  padding: 20px 25px;
  margin-bottom: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__terms-subtitle {
  font-size: 1.3em;
  color: var(--gold-color);
  margin-bottom: 10px;
  font-weight: 600;
}

.page-khuyen-mai__terms-description {
  font-size: 1em;
  color: var(--text-main);
}

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

.page-khuyen-mai__feature-card {
  background-color: var(--card-bg);
  border-radius: 10px;
  padding: 25px;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
  text-align: left;
  border: 1px solid var(--border-color);
}

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

.page-khuyen-mai__feature-description {
  font-size: 1em;
  color: var(--text-main);
}

.page-khuyen-mai__section--faq {
  background-color: var(--deep-red);
}

.page-khuyen-mai__faq-list {
  max-width: 900px;
  margin: 40px auto 0 auto;
  text-align: left;
}

.page-khuyen-mai__faq-item {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 15px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  font-size: 1.2em;
  font-weight: 600;
  color: var(--gold-color);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background-color 0.3s ease;
}

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

.page-khuyen-mai__faq-question:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.page-khuyen-mai__faq-toggle {
  font-size: 1.5em;
  line-height: 1;
  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 25px;
  font-size: 1em;
  color: var(--text-main);
  line-height: 1.7;
}

.page-khuyen-mai__call-to-action {
  background: var(--button-gradient);
  padding: 80px 0;
  color: var(--deep-red);
}

.page-khuyen-mai__section-title--cta {
  color: var(--deep-red);
  text-shadow: none;
}

.page-khuyen-mai__paragraph--cta {
  color: var(--deep-red);
}

.page-khuyen-mai__cta-buttons--bottom .page-khuyen-mai__btn--primary {
  background: var(--deep-red);
  color: var(--gold-color);
  border-color: var(--gold-color);
}

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

.page-khuyen-mai__cta-buttons--bottom .page-khuyen-mai__btn--secondary {
  background: var(--button-gradient);
  color: var(--deep-red);
  border-color: var(--deep-red);
}

.page-khuyen-mai__cta-buttons--bottom .page-khuyen-mai__btn--secondary:hover {
  filter: brightness(1.1);
}

.page-khuyen-mai__article-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 20px 40px 20px;
  text-align: center;
}

.page-khuyen-mai__copyright {
  font-size: 0.9em;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 30px;
}

/* General image responsiveness */
.page-khuyen-mai img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .page-khuyen-mai__main-title {
    font-size: clamp(2em, 5vw, 3em);
  }

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

  .page-khuyen-mai__promo-grid,
  .page-khuyen-mai__steps-grid,
  .page-khuyen-mai__feature-grid {
    gap: 25px;
  }

  .page-khuyen-mai__btn--large {
    padding: 14px 30px;
    font-size: 1.1em;
  }
}

@media (max-width: 768px) {
  /* 1. Top section title + CTA */
  .page-khuyen-mai__hero-section {
    min-height: 400px;
    padding-bottom: 40px;
  }

  .page-khuyen-mai__hero-image {
    margin-bottom: 15px;
  }

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

  .page-khuyen-mai__main-title {
    font-size: clamp(1.8em, 7vw, 2.5em) !important;
    margin-bottom: 10px;
  }

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

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

  .page-khuyen-mai__btn {
    width: 100% !important;
    max-width: 100% !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-khuyen-mai__btn--large {
    font-size: 1.1em;
  }

  .page-khuyen-mai__section {
    padding: 40px 0;
  }

  .page-khuyen-mai__section-title {
    font-size: 1.8em;
    margin-bottom: 30px;
  }

  .page-khuyen-mai__paragraph {
    font-size: 1em;
    padding: 0 15px;
  }

  /* 2. Single column long text containers */
  .page-khuyen-mai__container {
    padding: 0 15px !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

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

  .page-khuyen-mai__promo-card,
  .page-khuyen-mai__step-item,
  .page-khuyen-mai__feature-card,
  .page-khuyen-mai__terms-item {
    padding: 20px;
    text-align: center;
    align-items: center;
  }

  .page-khuyen-mai__card-title,
  .page-khuyen-mai__step-title,
  .page-khuyen-mai__feature-title,
  .page-khuyen-mai__terms-subtitle {
    font-size: 1.3em;
    text-align: center;
  }

  .page-khuyen-mai__card-description,
  .page-khuyen-mai__step-description,
  .page-khuyen-mai__feature-description,
  .page-khuyen-mai__terms-description {
    font-size: 0.95em;
    text-align: center;
  }

  .page-khuyen-mai__btn--small {
    width: 100%;
  }

  .page-khuyen-mai__step-icon {
    margin-bottom: 15px;
  }

  /* 3. General images and figure */
  .page-khuyen-mai img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }

  /* 4. Buttons and button containers (already covered above, reinforcing) */
  .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;
    flex-direction: column;
  }

  .page-khuyen-mai__cta-buttons--bottom {
    gap: 15px;
  }

  /* 5. FAQ blocks */
  .page-khuyen-mai__faq-list {
    margin-top: 30px;
  }

  .page-khuyen-mai__faq-question {
    padding: 15px 20px;
    font-size: 1.1em;
  }

  .page-khuyen-mai__faq-answer {
    padding: 0 20px 15px 20px;
    font-size: 0.95em;
  }

  .page-khuyen-mai__call-to-action {
    padding: 50px 0;
  }

  .page-khuyen-mai__section-title--cta {
    font-size: 1.8em;
  }

  .page-khuyen-mai__paragraph--cta {
    font-size: 1em;
  }

  .page-khuyen-mai__article-wrap {
    padding: 20px 15px 30px 15px;
  }

  .page-khuyen-mai__copyright {
    font-size: 0.8em;
  }
}