.page-khuyen-mai {
  font-family: 'Arial', sans-serif;
  color: #FFF6D6; /* Text Main */
  background-color: #0A0A0A; /* Background */
  line-height: 1.6;
}

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

.page-khuyen-mai__hero-image-wrapper {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  overflow: hidden;
}

.page-khuyen-mai__hero-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(0.7);
}

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

.page-khuyen-mai__main-title {
  font-size: 3.2em;
  font-weight: 700;
  line-height: 1.2;
  color: #FFD36B; /* Glow */
  margin-bottom: 15px;
  text-shadow: 0 0 10px rgba(255, 211, 107, 0.6);
}

.page-khuyen-mai__hero-description {
  font-size: 1.1em;
  margin-bottom: 30px;
  color: #FFF6D6;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.page-khuyen-mai__hero-cta-group {
  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: 1.1em;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s ease;
  box-sizing: border-box;
  max-width: 100%;
  white-space: normal;
  word-wrap: break-word;
}

.page-khuyen-mai__btn-primary {
  background: linear-gradient(180deg, #FFD86A 0%, #DDA11D 100%); /* Button */
  color: #111111; /* Dark text for bright button */
  border: none;
  box-shadow: 0 4px 15px rgba(255, 211, 107, 0.4);
}

.page-khuyen-mai__btn-primary:hover {
  background: linear-gradient(180deg, #FFE68A 0%, #EAA92A 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 211, 107, 0.6);
}

.page-khuyen-mai__btn-secondary {
  background: #111111; /* Card BG */
  color: #F2C14E; /* Main Color */
  border: 2px solid #F2C14E; /* Main Color */
}

.page-khuyen-mai__btn-secondary:hover {
  background: #F2C14E;
  color: #111111;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(242, 193, 78, 0.4);
}

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

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

.page-khuyen-mai__container--center {
  text-align: center;
}

.page-khuyen-mai__section-title {
  font-size: 2.5em;
  font-weight: 700;
  color: #FFD36B; /* Glow */
  text-align: center;
  margin-bottom: 40px;
  text-shadow: 0 0 8px rgba(255, 211, 107, 0.4);
}

.page-khuyen-mai__text-block {
  font-size: 1.05em;
  line-height: 1.7;
  margin-bottom: 20px;
  color: #FFF6D6;
}

.page-khuyen-mai__promo-overview .page-khuyen-mai__text-block {
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

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

.page-khuyen-mai__promo-card {
  background-color: #111111; /* Card BG */
  border: 1px solid #3A2A12; /* Border */
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-khuyen-mai__promo-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.5);
}

.page-khuyen-mai__promo-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 20px;
  display: block;
}

.page-khuyen-mai__card-title {
  font-size: 1.6em;
  font-weight: 600;
  color: #F2C14E; /* Main Color */
  margin-bottom: 15px;
}

.page-khuyen-mai__card-text {
  font-size: 0.95em;
  color: #FFF6D6;
  margin-bottom: 25px;
  flex-grow: 1;
}

.page-khuyen-mai__btn-card {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 0.95em;
  font-weight: 600;
  text-decoration: none;
  background: linear-gradient(180deg, #FFD86A 0%, #DDA11D 100%); /* Button */
  color: #111111;
  border: none;
  transition: all 0.3s ease;
  box-sizing: border-box;
  max-width: 100%;
  white-space: normal;
  word-wrap: break-word;
}

.page-khuyen-mai__btn-card:hover {
  background: linear-gradient(180deg, #FFE68A 0%, #EAA92A 100%);
  transform: translateY(-1px);
}

.page-khuyen-mai__list {
  list-style: none;
  padding-left: 0;
  margin-bottom: 30px;
}

.page-khuyen-mai__list-item {
  position: relative;
  padding-left: 30px;
  margin-bottom: 15px;
  font-size: 1.05em;
  color: #FFF6D6;
}

.page-khuyen-mai__list-item::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: #F2C14E; /* Main Color */
  font-weight: bold;
  font-size: 1.2em;
  line-height: 1;
}

.page-khuyen-mai__figure {
  margin: 40px auto;
  max-width: 800px;
  text-align: center;
}

.page-khuyen-mai__figure-image {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: 8px;
  border: 1px solid #3A2A12;
}

.page-khuyen-mai__figcaption {
  font-size: 0.9em;
  color: #FFD36B;
  margin-top: 10px;
  font-style: italic;
}

.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: #111111; /* Card BG */
  border: 1px solid #3A2A12; /* Border */
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-khuyen-mai__step-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.5);
}

.page-khuyen-mai__step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(180deg, #FFD86A 0%, #DDA11D 100%); /* Button */
  color: #111111;
  font-size: 1.8em;
  font-weight: 700;
  margin-bottom: 20px;
  box-shadow: 0 4px 10px rgba(255, 211, 107, 0.4);
}

.page-khuyen-mai__step-title {
  font-size: 1.5em;
  font-weight: 600;
  color: #F2C14E; /* Main Color */
  margin-bottom: 15px;
}

.page-khuyen-mai__step-text {
  font-size: 0.95em;
  color: #FFF6D6;
  margin-bottom: 25px;
  flex-grow: 1;
}

.page-khuyen-mai__btn-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 0.95em;
  font-weight: 600;
  text-decoration: none;
  background: #111111; /* Card BG */
  color: #F2C14E; /* Main Color */
  border: 2px solid #F2C14E; /* Main Color */
  transition: all 0.3s ease;
  box-sizing: border-box;
  max-width: 100%;
  white-space: normal;
  word-wrap: break-word;
}

.page-khuyen-mai__btn-step:hover {
  background: #F2C14E;
  color: #111111;
  transform: translateY(-1px);
}

.page-khuyen-mai__faq-list {
  margin-top: 30px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.page-khuyen-mai__faq-item {
  background-color: #111111; /* Card BG */
  border: 1px solid #3A2A12; /* Border */
  border-radius: 8px;
  margin-bottom: 15px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.page-khuyen-mai__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 25px;
  cursor: pointer;
  font-size: 1.15em;
  font-weight: 600;
  color: #F2C14E; /* Main Color */
  background-color: #111111;
  user-select: none;
  list-style: none; /* Hide default marker for details */
}

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

.page-khuyen-mai__faq-toggle {
  font-size: 1.5em;
  line-height: 1;
  transition: transform 0.3s ease;
  color: #FFD36B;
}

.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: 1em;
  line-height: 1.7;
  color: #FFF6D6;
  background-color: #111111;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, padding 0.3s ease-out;
}

.page-khuyen-mai__faq-item[open] .page-khuyen-mai__faq-answer {
  max-height: 500px; /* Sufficient height for content */
  padding-top: 10px;
  transition: max-height 0.5s ease-in, padding 0.3s ease-in;
}

.page-khuyen-mai__why-choose .page-khuyen-mai__text-block {
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.page-khuyen-mai__cta-final {
  padding: 80px 0;
  background-color: #111111; /* Card BG */
  border-top: 1px solid #3A2A12; /* Border */
}

.page-khuyen-mai__cta-group {
  display: flex;
  justify-content: center;
  gap: 25px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.page-khuyen-mai__btn--large {
  padding: 18px 40px;
  font-size: 1.2em;
  min-width: 250px;
}

/* --- Responsive Styles --- */
@media (max-width: 1024px) {
  .page-khuyen-mai__main-title {
    font-size: 2.8em;
  }

  .page-khuyen-mai__section-title {
    font-size: 2.2em;
  }

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

  .page-khuyen-mai__steps-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }

  .page-khuyen-mai__btn--large {
    min-width: unset;
    width: auto;
  }
}

@media (max-width: 768px) {
  .page-khuyen-mai {
    font-size: 15px;
  }

  .page-khuyen-mai__hero-section {
    padding-top: 10px !important; /* Ensure small top padding */
    padding-bottom: 30px;
  }

  .page-khuyen-mai__hero-content {
    margin-top: 15px;
    padding: 0 15px;
  }

  .page-khuyen-mai__main-title {
    font-size: 2em !important;
    margin-bottom: 10px;
  }

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

  .page-khuyen-mai__hero-cta-group {
    flex-direction: column;
    gap: 15px;
    padding: 0 15px;
  }

  .page-khuyen-mai__btn-primary,
  .page-khuyen-mai__btn-secondary,
  .page-khuyen-mai__btn-card,
  .page-khuyen-mai__btn-step,
  .page-khuyen-mai__btn--large {
    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__section {
    padding: 40px 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: 1.8em !important;
    margin-bottom: 30px;
  }

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

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

  .page-khuyen-mai__card-title,
  .page-khuyen-mai__step-title {
    font-size: 1.4em;
  }

  .page-khuyen-mai__list-item {
    font-size: 0.95em;
    padding-left: 25px;
  }

  .page-khuyen-mai__list-item::before {
    font-size: 1.1em;
  }

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

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

  .page-khuyen-mai__cta-group {
    flex-direction: column;
    gap: 15px;
    padding: 0 15px;
  }

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