/* style/khuyen-mai.css */

:root {
  --primary-color: #113B7A;
  --secondary-color: #1D5FD1;
  --button-gradient: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
  --card-bg: #10233F;
  --text-main: #F3F8FF;
  --text-secondary: #AFC4E8;
  --border-color: #244D84;
  --glow-color: #4FA8FF;
  --gold-color: #F2C14E;
  --divider-color: #1B3357;
  --deep-navy: #08162B;
}

.page-khuyen-mai {
  font-family: Arial, sans-serif;
  color: var(--text-main); /* Default text color for dark body background */
  background-color: var(--deep-navy); /* Assumed body background from shared.css */
}

.page-khuyen-mai__container {
  max-width: 1170px;
  margin: 0 auto;
  padding: 40px 16px;
  box-sizing: border-box;
}

/* HERO Section */
.page-khuyen-mai__hero-section {
  padding-top: 10px; /* Small top padding, relies on body padding-top for header offset */
  padding-bottom: 60px;
  background-color: var(--deep-navy);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.page-khuyen-mai__hero-content-wrapper {
  max-width: 800px;
  margin-bottom: 40px;
  padding: 0 16px;
}

.page-khuyen-mai__hero-title {
  color: var(--gold-color);
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}

.page-khuyen-mai__hero-description {
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 30px;
}

.page-khuyen-mai__hero-cta-group {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.page-khuyen-mai__hero-image-wrapper {
  width: 100%;
  max-width: 1200px;
  overflow: hidden;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.page-khuyen-mai__hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* Buttons */
.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary,
.page-khuyen-mai__btn-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 8px;
  font-size: 1.05rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  white-space: normal;
  word-wrap: break-word;
  box-sizing: border-box;
  max-width: 100%;
}

.page-khuyen-mai__btn-primary {
  background: var(--button-gradient);
  color: var(--text-main);
  border: none;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.page-khuyen-mai__btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.page-khuyen-mai__btn-secondary {
  background: var(--card-bg);
  color: var(--gold-color);
  border: 2px solid var(--border-color);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

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

.page-khuyen-mai__btn-link {
  background: transparent;
  color: var(--gold-color);
  border: 1px solid var(--gold-color);
  padding: 10px 20px;
  font-size: 0.95rem;
}

.page-khuyen-mai__btn-link:hover {
  background: var(--gold-color);
  color: var(--deep-navy);
}

/* Section Title */
.page-khuyen-mai__section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  color: var(--gold-color);
  font-weight: 700;
  text-align: center;
  margin-bottom: 50px;
  padding-top: 40px;
}

/* Promo Grid Section */
.page-khuyen-mai__promo-grid-section {
  background-color: var(--deep-navy);
  padding-bottom: 60px;
}

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

.page-khuyen-mai__promo-card {
  background-color: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-khuyen-mai__promo-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

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

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

.page-khuyen-mai__promo-card-title {
  font-size: 1.4rem;
  color: var(--gold-color);
  margin-bottom: 15px;
  font-weight: 600;
  line-height: 1.3;
}

.page-khuyen-mai__promo-card-description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 20px;
  flex-grow: 1;
}

/* Content Area */
.page-khuyen-mai__content-area {
  background-color: var(--deep-navy);
  padding-top: 60px;
  padding-bottom: 60px;
}

.page-khuyen-mai__content-area p {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.page-khuyen-mai__content-area p a {
  color: var(--gold-color);
  text-decoration: underline;
}

.page-khuyen-mai__content-area p a:hover {
  color: var(--glow-color);
}

/* FAQ Section */
.page-khuyen-mai__faq-section {
  background-color: var(--deep-navy);
  padding-top: 60px;
  padding-bottom: 80px;
}

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

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

.page-khuyen-mai__faq-item summary {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 25px;
  cursor: pointer;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
  transition: background-color 0.3s ease;
}

.page-khuyen-mai__faq-item summary:hover {
  background-color: var(--primary-color);
}

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

.page-khuyen-mai__faq-qtext {
  flex-grow: 1;
  padding-right: 15px;
}

.page-khuyen-mai__faq-toggle {
  font-size: 1.8rem;
  font-weight: 300;
  line-height: 1;
  color: var(--gold-color);
}

.page-khuyen-mai__faq-item[open] .page-khuyen-mai__faq-toggle {
  content: "−";
}

.page-khuyen-mai__faq-answer {
  padding: 0 25px 20px;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.page-khuyen-mai__faq-answer p {
  margin-bottom: 0;
  color: var(--text-secondary);
}

.page-khuyen-mai__faq-answer a {
  color: var(--gold-color);
  text-decoration: underline;
}

/* CTA Section */
.page-khuyen-mai__cta-section {
  background-color: var(--primary-color);
  padding: 80px 16px;
  text-align: center;
}

.page-khuyen-mai__cta-inner {
  max-width: 900px;
  padding: 0;
}

.page-khuyen-mai__cta-title {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--gold-color);
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.2;
}

.page-khuyen-mai__cta-description {
  font-size: 1.1rem;
  color: var(--text-main);
  line-height: 1.6;
  margin-bottom: 40px;
}

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

/* Responsive Styles */
@media (max-width: 768px) {
  /* HERO Section (双栏) */
  .page-khuyen-mai__hero-section {
    padding-top: 10px !important;
    padding-bottom: 40px;
  }
  .page-khuyen-mai__hero-content-wrapper {
    margin-bottom: 30px;
  }
  .page-khuyen-mai__hero-title {
    font-size: 2.2rem;
  }
  .page-khuyen-mai__hero-description {
    font-size: 1rem;
  }
  .page-khuyen-mai__hero-cta-group {
    flex-direction: column;
    gap: 15px;
  }

  /* Buttons (按钮与按钮容器) */
  .page-khuyen-mai__btn-primary,
  .page-khuyen-mai__btn-secondary,
  .page-khuyen-mai__btn-link,
  .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__hero-cta-group,
  .page-khuyen-mai__cta-buttons {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    flex-wrap: wrap !important;
    gap: 10px;
  }
  .page-khuyen-mai__hero-cta-group {
    flex-direction: column;
  }

  /* Module 1 (三栏正圆图) - Placeholder, not used in HTML for this page */
  .page-khuyen-mai__icon-box-media {
    width: 200px;
    height: 200px;
    margin: 0 auto 16px;
  }

  /* Seven Tab Game Area (七 Tab 游戏区) - Placeholder, not used in HTML for this page */
  .page-khuyen-mai__game-tabs {
    flex-direction: column;
  }
  .page-khuyen-mai__tab-nav {
    flex-direction: column;
    width: 100%;
  }
  .page-khuyen-mai__game-panel {
    width: 100%;
  }

  /* Content Sections (教程长文 / 促销 / 信任 / FAQ / 博客 / intro 排版) */
  .page-khuyen-mai__container {
    padding: 20px 15px;
  }
  .page-khuyen-mai__section-title {
    font-size: 1.8rem;
    margin-bottom: 30px;
    padding-top: 20px;
  }
  .page-khuyen-mai__promo-cards {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .page-khuyen-mai__promo-card-image {
    height: 180px;
  }
  .page-khuyen-mai__promo-card-title {
    font-size: 1.2rem;
  }
  .page-khuyen-mai__promo-card-description,
  .page-khuyen-mai__content-area p,
  .page-khuyen-mai__faq-answer p {
    font-size: 0.95rem;
  }
  .page-khuyen-mai__faq-item summary {
    font-size: 1rem;
    padding: 15px 20px;
  }
  .page-khuyen-mai__faq-toggle {
    font-size: 1.5rem;
  }
  .page-khuyen-mai__faq-answer {
    padding: 0 20px 15px;
  }
  .page-khuyen-mai__cta-section {
    padding: 60px 15px;
  }
  .page-khuyen-mai__cta-title {
    font-size: 2rem;
  }
  .page-khuyen-mai__cta-description {
    font-size: 1rem;
    margin-bottom: 30px;
  }

  /* General Images (通用图片与容器) */
  .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__hero-content-wrapper,
  .page-khuyen-mai__hero-image-wrapper {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }
  .page-khuyen-mai__hero-image-wrapper {
    padding-left: 0;
    padding-right: 0;
  }
}