:root {
  --page-khuyen-mai-primary: #11A84E;
  --page-khuyen-mai-secondary: #22C768;
  --page-khuyen-mai-btn-gradient: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
  --page-khuyen-mai-card-bg: #11271B;
  --page-khuyen-mai-background: #08160F;
  --page-khuyen-mai-text-main: #F2FFF6;
  --page-khuyen-mai-text-secondary: #A7D9B8;
  --page-khuyen-mai-border: #2E7A4E;
  --page-khuyen-mai-glow: #57E38D;
  --page-khuyen-mai-gold: #F2C14E;
  --page-khuyen-mai-divider: #1E3A2A;
  --page-khuyen-mai-deep-green: #0A4B2C;
}

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

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

/* Hero Section */
.page-khuyen-mai__hero-section {
  position: relative;
  overflow: hidden;
  padding-top: 10px; /* Small top padding, body handles header offset */
  padding-bottom: 60px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-khuyen-mai__hero-image {
  width: 100%;
  max-height: 500px; /* Limit height for aesthetic */
  overflow: hidden;
  margin-bottom: 40px;
}

.page-khuyen-mai__hero-image img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover; /* Cover for desktop, will change to contain for mobile */
}

.page-khuyen-mai__hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  padding: 0 20px;
}

.page-khuyen-mai__main-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem); /* Responsive font size */
  font-weight: 700;
  color: var(--page-khuyen-mai-gold);
  margin-bottom: 20px;
  text-shadow: 0 0 10px rgba(87, 227, 141, 0.5); /* Glow effect */
  line-height: 1.2;
}

.page-khuyen-mai__hero-description {
  font-size: 1.15rem;
  color: var(--page-khuyen-mai-text-secondary);
  margin-bottom: 40px;
}

.page-khuyen-mai__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  width: 100%; /* Ensure container width for mobile */
  max-width: 600px;
}

.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary {
  display: inline-block;
  padding: 15px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  cursor: pointer;
  max-width: 100%; /* Button responsive */
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-khuyen-mai__btn-primary {
  background: var(--page-khuyen-mai-btn-gradient);
  color: #ffffff;
  border: none;
  box-shadow: 0 5px 15px rgba(42, 209, 111, 0.4);
}

.page-khuyen-mai__btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(42, 209, 111, 0.6);
}

.page-khuyen-mai__btn-secondary {
  background: transparent;
  color: var(--page-khuyen-mai-gold);
  border: 2px solid var(--page-khuyen-mai-gold);
  box-shadow: 0 5px 15px rgba(242, 193, 78, 0.2);
}

.page-khuyen-mai__btn-secondary:hover {
  background: rgba(242, 193, 78, 0.1);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(242, 193, 78, 0.4);
}

/* General Section Styles */
.page-khuyen-mai__section {
  padding: 80px 0;
}

.page-khuyen-mai__section:nth-child(even) {
  background-color: rgba(17, 39, 27, 0.5); /* Card BG with some transparency for subtle variation */
}

.page-khuyen-mai__section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  color: var(--page-khuyen-mai-gold);
  text-align: center;
  margin-bottom: 20px;
  font-weight: 700;
  text-shadow: 0 0 5px rgba(87, 227, 141, 0.3);
}

.page-khuyen-mai__section-description {
  font-size: 1.05rem;
  color: var(--page-khuyen-mai-text-secondary);
  text-align: center;
  max-width: 800px;
  margin: 0 auto 60px;
}

/* Promo Grid */
.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(--page-khuyen-mai-card-bg);
  border: 1px solid var(--page-khuyen-mai-border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}

.page-khuyen-mai__promo-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.3);
}

.page-khuyen-mai__promo-card img {
  width: 100%;
  height: 200px; /* Fixed height for consistency */
  object-fit: cover;
  display: block;
  min-width: 200px;
  min-height: 200px;
}

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

.page-khuyen-mai__card-title {
  font-size: 1.4rem;
  color: var(--page-khuyen-mai-text-main);
  margin-bottom: 15px;
  font-weight: 600;
}

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

.page-khuyen-mai__card-link {
  color: var(--page-khuyen-mai-gold);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  transition: color 0.3s ease;
}

.page-khuyen-mai__card-link:hover {
  color: var(--page-khuyen-mai-glow);
}

.page-khuyen-mai__arrow {
  margin-left: 8px;
  font-size: 1.2rem;
  line-height: 1;
  transition: transform 0.3s ease;
}

.page-khuyen-mai__card-link:hover .page-khuyen-mai__arrow {
  transform: translateX(5px);
}

/* How to Claim Section */
.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: var(--page-khuyen-mai-card-bg);
  border: 1px solid var(--page-khuyen-mai-border);
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-khuyen-mai__step-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.page-khuyen-mai__step-icon {
  width: 60px;
  height: 60px;
  background: var(--page-khuyen-mai-btn-gradient);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 2rem;
  font-weight: 700;
  color: #ffffff;
  margin: 0 auto 25px;
  box-shadow: 0 0 15px rgba(42, 209, 111, 0.6);
}

.page-khuyen-mai__step-title {
  font-size: 1.3rem;
  color: var(--page-khuyen-mai-text-main);
  margin-bottom: 15px;
  font-weight: 600;
}

.page-khuyen-mai__step-text {
  font-size: 0.95rem;
  color: var(--page-khuyen-mai-text-secondary);
}

.page-khuyen-mai__full-cta {
  text-align: center;
  margin-top: 60px;
}

/* Terms & Conditions */
.page-khuyen-mai__article-body {
  padding: 40px 0;
  color: var(--page-khuyen-mai-text-main);
}

.page-khuyen-mai__article-body h2 {
  color: var(--page-khuyen-mai-gold);
  margin-bottom: 30px;
}

.page-khuyen-mai__article-body h3.page-khuyen-mai__sub-title {
  font-size: 1.5rem;
  color: var(--page-khuyen-mai-text-main);
  margin-top: 30px;
  margin-bottom: 15px;
  font-weight: 600;
}

.page-khuyen-mai__article-body p {
  margin-bottom: 15px;
  color: var(--page-khuyen-mai-text-secondary);
}

.page-khuyen-mai__article-body a {
  color: var(--page-khuyen-mai-gold);
  text-decoration: underline;
}
.page-khuyen-mai__article-body a:hover {
  color: var(--page-khuyen-mai-glow);
}

/* Why Choose Section */
.page-khuyen-mai__feature-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-khuyen-mai__feature-item {
  background-color: var(--page-khuyen-mai-card-bg);
  border: 1px solid var(--page-khuyen-mai-border);
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.page-khuyen-mai__feature-item img {
   /* Display size */
  
  object-fit: contain;
  margin: 0 auto 20px;
  display: block;
  min-width: 200px; /* To satisfy the minimum image file size requirement */
  min-height: 200px;
}

.page-khuyen-mai__feature-title {
  font-size: 1.3rem;
  color: var(--page-khuyen-mai-text-main);
  margin-bottom: 15px;
  font-weight: 600;
}

.page-khuyen-mai__feature-text {
  font-size: 0.95rem;
  color: var(--page-khuyen-mai-text-secondary);
}

/* FAQ Section */
.page-khuyen-mai__faq-list {
  margin-top: 40px;
}

details.page-khuyen-mai__faq-item {
  margin-bottom: 15px;
  border-radius: 12px;
  border: 1px solid var(--page-khuyen-mai-border);
  overflow: hidden;
  background: var(--page-khuyen-mai-card-bg);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}
details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
  color: var(--page-khuyen-mai-text-main);
  font-weight: 600;
}
details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question::-webkit-details-marker {
  display: none;
}
details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question:hover {
  background: rgba(var(--page-khuyen-mai-primary), 0.1);
}
.page-khuyen-mai__faq-qtext {
  flex: 1;
  font-size: 1.1rem;
  line-height: 1.5;
  text-align: left;
}
.page-khuyen-mai__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  color: var(--page-khuyen-mai-gold);
  flex-shrink: 0;
  margin-left: 15px;
  width: 28px;
  text-align: center;
  transition: transform 0.3s ease;
}
details.page-khuyen-mai__faq-item[open] .page-khuyen-mai__faq-toggle {
  transform: rotate(45deg); /* Change + to X or similar */
  color: var(--page-khuyen-mai-glow);
}
details.page-khuyen-mai__faq-item .page-khuyen-mai__faq-answer {
  padding: 0 25px 25px;
  background: var(--page-khuyen-mai-background);
  border-radius: 0 0 12px 12px;
  color: var(--page-khuyen-mai-text-secondary);
}
.page-khuyen-mai__faq-answer p {
  margin: 0;
  font-size: 0.95rem;
}


/* Final CTA Section */
.page-khuyen-mai__final-cta {
  text-align: center;
  padding: 80px 0;
  background: linear-gradient(90deg, var(--page-khuyen-mai-deep-green), var(--page-khuyen-mai-primary));
  border-radius: 12px;
  margin: 60px auto;
  max-width: 1000px;
}
.page-khuyen-mai__final-cta .page-khuyen-mai__section-title {
  color: #ffffff;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}
.page-khuyen-mai__final-cta .page-khuyen-mai__section-description {
  color: #f0f0f0;
  margin-bottom: 40px;
}


/* --- Responsive Styles --- */

/* Tablet (max-width: 1024px) */
@media (max-width: 1024px) {
  .page-khuyen-mai__main-title {
    font-size: clamp(2rem, 4.5vw, 3rem);
  }
  .page-khuyen-mai__hero-description {
    font-size: 1.1rem;
  }
  .page-khuyen-mai__section-title {
    font-size: clamp(1.6rem, 3vw, 2.5rem);
  }
  .page-khuyen-mai__promo-grid,
  .page-khuyen-mai__steps-grid,
  .page-khuyen-mai__feature-list {
    gap: 20px;
  }
  .page-khuyen-mai__promo-card img {
    
  }
  .page-khuyen-mai__card-content {
    padding: 20px;
  }
  .page-khuyen-mai__card-title {
    font-size: 1.3rem;
  }
  .page-khuyen-mai__step-card {
    padding: 25px;
  }
  .page-khuyen-mai__step-icon {
    width: 50px;
    height: 50px;
    font-size: 1.8rem;
    margin-bottom: 20px;
  }
  .page-khuyen-mai__step-title {
    font-size: 1.2rem;
  }
  .page-khuyen-mai__feature-item img {
    
    
  }
  .page-khuyen-mai__faq-qtext {
    font-size: 1rem;
  }
  .page-khuyen-mai__faq-question {
    padding: 15px 20px;
  }
  .page-khuyen-mai__faq-answer {
    padding: 0 20px 20px;
  }
}

/* Mobile (max-width: 768px) */
@media (max-width: 768px) {
  /* General Mobile Styles */
  .page-khuyen-mai {
    font-size: 16px; /* Mobile increased base font size */
    line-height: 1.6;
  }
  .page-khuyen-mai__container {
    padding: 0 15px;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }
  .page-khuyen-mai__section {
    padding: 40px 0;
  }

  /* HERO 主图区域 - Mobile */
  .page-khuyen-mai__hero-section {
    padding-top: 10px;
    padding-bottom: 40px;
  }
  .page-khuyen-mai__hero-image {
    max-height: 300px;
    margin-bottom: 30px;
  }
  .page-khuyen-mai__hero-image img {
    object-fit: contain !important; /* Force contain for mobile */
    aspect-ratio: unset !important; /* Remove aspect ratio if set */
    width: 100% !important;
    height: auto !important;
    max-width: 100% !important;
  }
  .page-khuyen-mai__main-title {
    font-size: clamp(1.8rem, 8vw, 2.5rem);
    margin-bottom: 15px;
  }
  .page-khuyen-mai__hero-description {
    font-size: 1rem;
    margin-bottom: 30px;
  }
  .page-khuyen-mai__cta-buttons {
    flex-direction: column; /* Stack buttons vertically */
    gap: 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding: 0 15px;
  }

  /* 按钮与按钮容器 - Mobile */
  .page-khuyen-mai__btn-primary,
  .page-khuyen-mai__btn-secondary,
  .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: 12px 20px !important;
    font-size: 1rem !important;
  }
  .page-khuyen-mai__section-title {
    font-size: clamp(1.5rem, 6vw, 2rem);
    margin-bottom: 15px;
  }
  .page-khuyen-mai__section-description {
    font-size: 0.95rem;
    margin-bottom: 30px;
  }

  /* 产品展示图区域 (Promo Grid) - Mobile */
  .page-khuyen-mai__promo-grid {
    grid-template-columns: 1fr; /* Single column for cards */
    gap: 20px;
    margin-top: 30px;
    overflow-x: hidden;
  }
  .page-khuyen-mai__promo-card img {
    
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-khuyen-mai__card-content {
    padding: 15px;
  }
  .page-khuyen-mai__card-title {
    font-size: 1.2rem;
    margin-bottom: 10px;
  }
  .page-khuyen-mai__card-text {
    font-size: 0.9rem;
    margin-bottom: 15px;
  }

  /* How to Claim Section - Mobile */
  .page-khuyen-mai__steps-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 30px;
  }
  .page-khuyen-mai__step-card {
    padding: 20px;
  }
  .page-khuyen-mai__step-icon {
    width: 45px;
    height: 45px;
    font-size: 1.6rem;
    margin-bottom: 15px;
  }
  .page-khuyen-mai__step-title {
    font-size: 1.1rem;
  }
  .page-khuyen-mai__full-cta {
    margin-top: 40px;
  }

  /* 装饰主标题 + 长文 SEO 区 (Article Body) - Mobile */
  .page-khuyen-mai__article-body {
    padding: 20px 0;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }
  .page-khuyen-mai__article-body h2 {
    font-size: clamp(1.5rem, 6vw, 2rem);
    margin-bottom: 20px;
  }
  .page-khuyen-mai__article-body h3.page-khuyen-mai__sub-title {
    font-size: 1.3rem;
    margin-top: 25px;
    margin-bottom: 10px;
  }
  .page-khuyen-mai__article-body p {
    font-size: 0.95rem;
  }

  /* Why Choose Section - Mobile */
  .page-khuyen-mai__feature-list {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 30px;
  }
  .page-khuyen-mai__feature-item img {
    
    
    margin-bottom: 15px;
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-khuyen-mai__feature-title {
    font-size: 1.1rem;
  }
  .page-khuyen-mai__feature-text {
    font-size: 0.9rem;
  }

  /* FAQ Section - Mobile */
  details.page-khuyen-mai__faq-item {
    margin-bottom: 10px;
    border-radius: 8px;
  }
  details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question {
    padding: 12px 15px;
  }
  .page-khuyen-mai__faq-qtext {
    font-size: 0.95rem;
  }
  .page-khuyen-mai__faq-toggle {
    font-size: 20px;
    width: 24px;
    height: 24px;
    margin-left: 10px;
  }
  details.page-khuyen-mai__faq-item .page-khuyen-mai__faq-answer {
    padding: 0 15px 15px;
  }
  .page-khuyen-mai__faq-answer p {
    font-size: 0.9rem;
  }

  /* Final CTA Section - Mobile */
  .page-khuyen-mai__final-cta {
    padding: 40px 15px;
    margin: 40px auto;
  }
  .page-khuyen-mai__final-cta .page-khuyen-mai__section-title {
    font-size: clamp(1.5rem, 7vw, 2rem);
    margin-bottom: 20px;
  }
  .page-khuyen-mai__final-cta .page-khuyen-mai__section-description {
    font-size: 0.95rem;
    margin-bottom: 30px;
  }

  /* 通用图片与容器 - Mobile */
  .page-khuyen-mai img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-khuyen-mai__section,
  .page-khuyen-mai__card,
  .page-khuyen-mai__container,
  .page-khuyen-mai__promo-card,
  .page-khuyen-mai__step-card,
  .page-khuyen-mai__feature-item {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }
}