:root {
  --e88-primary: #26A9E0;
  --e88-secondary: #FFFFFF;
  --e88-login: #EA7C07;
  --e88-text-dark: #333333;
  --e88-text-light: #ffffff;
  --e88-bg-light: #f9f9f9;
  --e88-border-light: #e0e0e0;
}

/* Base styles for the page content */
.page-khuyen-mai {
  font-family: 'Arial', sans-serif;
  color: var(--e88-text-dark); /* Default text color for light backgrounds */
  line-height: 1.6;
  background-color: var(--e88-secondary); /* Assuming shared.css sets body bg to white/light */
}

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

/* Section spacing */
.page-khuyen-mai__section-spacing {
  padding: 60px 0;
}

/* Headings */
.page-khuyen-mai__section-heading {
  font-size: 36px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 40px;
  color: var(--e88-primary);
  line-height: 1.2;
}

/* Text block styles */
.page-khuyen-mai__text-block p {
  margin-bottom: 15px;
  font-size: 17px;
}
.page-khuyen-mai__text-block strong {
  color: var(--e88-primary);
}
.page-khuyen-mai__text-block a {
  color: var(--e88-primary);
  text-decoration: underline;
}

/* Hero Section */
.page-khuyen-mai__hero-section {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background-color: var(--e88-primary); /* Fallback if image not loaded */
  padding-top: 10px; /* Small top padding, assuming body handles --header-offset */
}

.page-khuyen-mai__hero-image {
  width: 100%;
  position: relative;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

.page-khuyen-mai__hero-image img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover; /* Default for desktop */
  aspect-ratio: 16 / 9;
}

.page-khuyen-mai__hero-content {
  position: relative;
  padding: 40px 20px 60px;
  max-width: 900px;
  z-index: 1;
  background-color: var(--e88-primary);
  color: var(--e88-text-light);
  width: 100%;
  box-sizing: border-box;
}

.page-khuyen-mai__main-title {
  font-size: clamp(32px, 4.5vw, 56px); /* Responsive H1 font size */
  color: var(--e88-text-light);
  margin-bottom: 20px;
  font-weight: 800;
  line-height: 1.1;
}

.page-khuyen-mai__hero-description {
  font-size: 20px;
  margin-bottom: 30px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* CTA Buttons */
.page-khuyen-mai__cta-button {
  display: inline-block;
  padding: 15px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
  transition: all 0.3s ease;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-khuyen-mai__btn-primary {
  background-color: var(--e88-login); /* Login color for primary action */
  color: var(--e88-secondary);
  border: 2px solid var(--e88-login);
}

.page-khuyen-mai__btn-primary:hover {
  background-color: #d16b00;
  border-color: #d16b00;
}

.page-khuyen-mai__btn-secondary {
  background-color: transparent;
  color: var(--e88-primary);
  border: 2px solid var(--e88-primary);
}

.page-khuyen-mai__btn-secondary:hover {
  background-color: var(--e88-primary);
  color: var(--e88-secondary);
}

.page-khuyen-mai__button-group {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 30px;
  flex-wrap: wrap;
}

/* Promotion Types Section */
.page-khuyen-mai__promotion-types {
  background-color: var(--e88-primary);
  color: var(--e88-text-light);
}

.page-khuyen-mai__promotion-types .page-khuyen-mai__section-heading {
  color: var(--e88-text-light);
}

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

.page-khuyen-mai__promo-card {
  background-color: var(--e88-secondary);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  text-align: center;
  padding-bottom: 30px;
  color: var(--e88-text-dark);
}

.page-khuyen-mai__card-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  display: block;
  margin-bottom: 20px;
}

.page-khuyen-mai__card-title {
  font-size: 22px;
  font-weight: 700;
  margin: 0 20px 15px;
  line-height: 1.3;
  color: var(--e88-primary);
}

.page-khuyen-mai__card-description {
  font-size: 16px;
  margin: 0 20px 25px;
  flex-grow: 1;
}

.page-khuyen-mai__promo-card .page-khuyen-mai__btn-secondary {
  margin: 0 auto;
  padding: 10px 20px;
  font-size: 16px;
}

/* Guide Section */
.page-khuyen-mai__guide-list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: guide-counter;
}

.page-khuyen-mai__guide-list li {
  counter-increment: guide-counter;
  margin-bottom: 20px;
  padding-left: 40px;
  position: relative;
  font-size: 17px;
}

.page-khuyen-mai__guide-list li::before {
  content: counter(guide-counter);
  position: absolute;
  left: 0;
  top: 0;
  background-color: var(--e88-primary);
  color: var(--e88-text-light);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
}

/* Terms Section */
.page-khuyen-mai__light-bg {
  background-color: var(--e88-bg-light);
}

/* FAQ Section */
details.page-khuyen-mai__faq-item {
  margin-bottom: 15px;
  border-radius: 5px;
  border: 1px solid var(--e88-border-light);
  overflow: hidden;
  background: var(--e88-secondary);
}
details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
}
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: var(--e88-bg-light);
}
.page-khuyen-mai__faq-qtext {
  flex: 1;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: var(--e88-primary);
}
.page-khuyen-mai__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  color: var(--e88-primary);
  flex-shrink: 0;
  margin-left: 15px;
  width: 28px;
  text-align: center;
}
details.page-khuyen-mai__faq-item .page-khuyen-mai__faq-answer {
  padding: 0 20px 20px;
  background: var(--e88-bg-light);
  border-radius: 0 0 5px 5px;
}
.page-khuyen-mai__faq-answer p {
  margin: 0;
  font-size: 16px;
  color: var(--e88-text-dark);
}
.page-khuyen-mai__faq-answer a {
  color: var(--e88-primary);
  text-decoration: underline;
}

/* Bottom CTA */
.page-khuyen-mai__cta-bottom {
  text-align: center;
  background-color: var(--e88-primary);
  color: var(--e88-text-light);
}
.page-khuyen-mai__cta-bottom .page-khuyen-mai__section-heading {
  color: var(--e88-text-light);
}
.page-khuyen-mai__cta-description {
  font-size: 20px;
  max-width: 800px;
  margin: 0 auto 30px;
}
.page-khuyen-mai__cta-bottom .page-khuyen-mai__btn-primary {
  background-color: var(--e88-login);
  border-color: var(--e88-login);
  color: var(--e88-secondary);
}
.page-khuyen-mai__cta-bottom .page-khuyen-mai__btn-primary:hover {
  background-color: #d16b00;
  border-color: #d16b00;
}


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

/* Tablet (max-width: 1024px) - General adjustments */
@media (max-width: 1024px) {
  .page-khuyen-mai__section-heading {
    font-size: 32px;
  }
  .page-khuyen-mai__hero-description {
    font-size: 18px;
  }
  .page-khuyen-mai__cta-button {
    font-size: 16px;
    padding: 12px 25px;
  }
  .page-khuyen-mai__card-title {
    font-size: 20px;
  }
  .page-khuyen-mai__card-description {
    font-size: 15px;
  }
  .page-khuyen-mai__faq-qtext {
    font-size: 16px;
  }
}


/* Mobile (max-width: 768px) - Must include all required sections */
@media (max-width: 768px) {
  /* General page content adjustments */
  .page-khuyen-mai {
    font-size: 16px;
    line-height: 1.6;
  }
  .page-khuyen-mai__container {
    padding: 0 15px !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    overflow-x: hidden !important; /* Prevent horizontal scroll */
  }
  .page-khuyen-mai__section-spacing {
    padding: 40px 0;
  }
  .page-khuyen-mai__section-heading {
    font-size: 28px;
    margin-bottom: 30px;
  }
  .page-khuyen-mai__text-block p {
    font-size: 16px;
  }

  /* 1. HERO 主图区域 */
  .page-khuyen-mai__hero-section {
    padding-top: 10px;
  }
  .page-khuyen-mai__hero-image img {
    object-fit: contain !important;
    aspect-ratio: unset !important;
    height: auto !important;
    max-width: 100% !important;
    width: 100% !important;
  }
  .page-khuyen-mai__hero-content {
    padding: 30px 15px 40px;
  }
  .page-khuyen-mai__main-title {
    font-size: clamp(28px, 8vw, 40px);
    margin-bottom: 15px;
  }
  .page-khuyen-mai__hero-description {
    font-size: 16px;
    margin-bottom: 25px;
  }

  /* 2. 产品展示图区域 (General image/card rules for mobile) */
  .page-khuyen-mai__promotion-types {
    overflow-x: hidden !important;
  }
  .page-khuyen-mai__grid-layout {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .page-khuyen-mai__promo-card {
    padding-bottom: 20px;
  }
  .page-khuyen-mai__card-image {
    height: 200px;
    max-width: 100% !important;
    width: 100% !important;
  }
  .page-khuyen-mai__card-title {
    font-size: 18px;
    margin: 0 15px 10px;
  }
  .page-khuyen-mai__card-description {
    font-size: 14px;
    margin: 0 15px 20px;
  }

  /* 3. 装饰主标题 + 长文 SEO 区 (General text blocks, lists) */
  .page-khuyen-mai__intro-section,
  .page-khuyen-mai__guide-section,
  .page-khuyen-mai__terms-section {
    overflow-x: hidden !important;
  }
  .page-khuyen-mai__text-block {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }
  .page-khuyen-mai__guide-list li {
    font-size: 16px;
    padding-left: 35px;
  }
  .page-khuyen-mai__guide-list li::before {
    width: 28px;
    height: 28px;
    font-size: 16px;
  }

  /* 4. 通用图片与容器 */
  .page-khuyen-mai img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }
  .page-khuyen-mai__section,
  .page-khuyen-mai__card,
  .page-khuyen-mai__container,
  .page-khuyen-mai__text-block {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  /* 5. 按钮与按钮容器 */
  .page-khuyen-mai__cta-button,
  .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-left: 15px;
    padding-right: 15px;
  }
  .page-khuyen-mai__button-group {
    flex-direction: column !important;
    gap: 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding: 0 15px;
  }
  .page-khuyen-mai__cta-bottom .page-khuyen-mai__cta-button {
    margin-left: auto;
    margin-right: auto;
  }

  /* FAQ specific mobile styles */
  details.page-khuyen-mai__faq-item summary.page-khuyen-mai__faq-question {
    padding: 15px;
  }
  .page-khuyen-mai__faq-qtext {
    font-size: 15px;
  }
  .page-khuyen-mai__faq-toggle {
    font-size: 20px;
    width: 24px;
    height: 24px;
  }
  details.page-khuyen-mai__faq-item .page-khuyen-mai__faq-answer {
    padding: 0 15px 15px;
  }
  .page-khuyen-mai__faq-answer p {
    font-size: 15px;
  }
}