:root {
  --primary-color: #C91F17;
  --secondary-color: #E53935;
  --button-gradient: linear-gradient(180deg, #FFD86A 0%, #E6B800 100%);
  --card-bg-color: #D32F2F;
  --page-background-color: #B71C1C;
  --text-main-color: #FFF5E1;
  --border-color: #F2B544;
  --glow-color: #FFCC66;
  --gold-color: #F4D34D;
  --deep-red-color: #7A0E0E;
  --warning-bg-color: #7A0E0E; /* Sử dụng Deep Red cho nền cảnh báo */
  --warning-border-color: #FF4141; /* Màu đỏ nổi bật cho viền cảnh báo */
  --promo-box-bg-color: #FFFBE6; /* Màu nền nhạt cho hộp khuyến mãi */
  --promo-box-border-color: #111; /* Màu viền đậm cho hộp khuyến mãi */
}

.page-index {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-main-color); /* Toàn bộ text mặc định là màu sáng */
  background-color: var(--page-background-color); /* Đảm bảo nền body là màu đã cho */
}

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

.page-index__section {
  padding: 40px 0;
  margin-bottom: 20px;
  background-color: var(--page-background-color);
  color: var(--text-main-color);
}

.page-index__top-section {
  padding-top: 10px; /* Small top padding, not --header-offset */
  text-align: center;
}

.page-index__page-title {
  font-size: 2.8em;
  font-weight: bold;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--gold-color); /* H1 dùng màu vàng nổi bật */
}

.page-index__lead-text {
  font-size: 1.1em;
  margin-bottom: 30px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.page-index__top-cta {
  display: flex;
  gap: 15px;
  justify-content: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.page-index__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 30px;
  border-radius: 6px;
  font-size: 1.1em;
  font-weight: bold;
  text-decoration: none;
  cursor: pointer;
  min-height: 44px;
  box-sizing: border-box;
  max-width: 100%;
  white-space: normal;
  word-wrap: break-word;
  transition: background-color 0.3s ease, transform 0.2s ease;
  border: none;
  color: #fff;
}

.page-index__btn--primary {
  background: var(--button-gradient);
  color: var(--deep-red-color); /* Text on gold button */
  box-shadow: 0 4px 15px rgba(255, 204, 102, 0.4);
}

.page-index__btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 204, 102, 0.6);
}

.page-index__section-title {
  font-size: 2.2em;
  font-weight: bold;
  margin-bottom: 25px;
  text-align: center;
  color: var(--gold-color); /* Tiêu đề phần dùng màu vàng */
}

.page-index__sub-title {
  font-size: 1.5em;
  font-weight: bold;
  margin-top: 30px;
  margin-bottom: 15px;
  color: var(--gold-color); /* Tiêu đề phụ dùng màu vàng */
}

.page-index__benefit-list,
.page-index__fact-list,
.page-index__why-choose-list,
.page-index__promo-list,
.page-index__card-list,
.page-index__identification-list,
.page-index__contact-list {
  list-style: none;
  padding-left: 0;
  margin-bottom: 20px;
}

.page-index__benefit-list li,
.page-index__fact-list li,
.page-index__why-choose-list li,
.page-index__promo-list li,
.page-index__card-list li,
.page-index__identification-list li,
.page-index__contact-list li {
  margin-bottom: 10px;
  padding-left: 25px;
  position: relative;
}

.page-index__benefit-list li::before,
.page-index__fact-list li::before,
.page-index__why-choose-list li::before,
.page-index__promo-list li::before,
.page-index__card-list li::before,
.page-index__identification-list li::before,
.page-index__contact-list li::before {
  content: '✔️'; /* Dấu tích màu xanh */
  position: absolute;
  left: 0;
  color: var(--gold-color); /* Màu vàng cho dấu tích */
}

.page-index__identification-list li::before {
  content: counter(list-item) '.';
  counter-increment: list-item;
  font-weight: bold;
  color: var(--gold-color);
  left: 0;
}
.page-index__identification-list {
  counter-reset: list-item;
}

.page-index__emphasis-text {
  text-align: center;
  font-size: 1.1em;
  margin-top: 30px;
}

.page-index__link--emphasis,
.page-index__link--contact {
  color: var(--gold-color);
  text-decoration: underline;
}

.page-index__info-card {
  background: var(--card-bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 25px;
  margin-top: 30px;
  margin-bottom: 30px;
  color: var(--text-main-color);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.page-index__warning-card {
  background: var(--warning-bg-color);
  border-left: 5px solid var(--warning-border-color);
  border-radius: 8px;
  padding: 20px;
  margin-top: 30px;
  margin-bottom: 30px;
  color: var(--text-main-color);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.page-index__card-title {
  font-size: 1.3em;
  font-weight: bold;
  margin-bottom: 15px;
  color: var(--gold-color); /* Tiêu đề thẻ dùng màu vàng */
}

.page-index__card-note {
  font-style: italic;
  font-size: 0.9em;
  margin-top: 15px;
}

.page-index__seo-content p {
  text-align: justify;
  margin-bottom: 15px;
}

.page-index__wp-caption {
  margin: 30px auto;
  max-width: 680px; /* Chiều rộng tối đa cho hình ảnh trong bài viết */
  text-align: center;
  background: rgba(0,0,0,0.1); /* Nền nhẹ cho caption */
  padding: 10px;
  border-radius: 8px;
  box-sizing: border-box;
}

.page-index__wp-caption img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 6px;
  margin: 0 auto;
}

.page-index__figcaption {
  font-size: 0.9em;
  color: var(--text-main-color);
  margin-top: 10px;
}

.page-index__blockquote {
  background: rgba(255, 255, 255, 0.05);
  border-left: 5px solid var(--gold-color);
  margin: 30px 0;
  padding: 20px 25px;
  font-style: italic;
  color: var(--text-main-color);
  border-radius: 0 8px 8px 0;
}

.page-index__blockquote cite {
  display: block;
  margin-top: 15px;
  font-style: normal;
  font-weight: bold;
  color: var(--gold-color);
}

.page-index__cta-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
  margin-top: 30px;
  flex-wrap: wrap;
}

.page-index__promo-box {
  background: var(--promo-box-bg-color);
  border: 2px dashed var(--promo-box-border-color);
  border-radius: 10px;
  padding: 30px;
  text-align: center;
  margin-top: 40px;
  margin-bottom: 40px;
  color: #333; /* Text màu đen trên nền promo box nhạt */
}

.page-index__promo-box .page-index__box-title {
  font-size: 1.8em;
  font-weight: bold;
  margin-bottom: 20px;
  color: var(--deep-red-color); /* Tiêu đề promo box dùng màu đỏ */
}

.page-index__promo-box .page-index__promo-list li::before {
  color: var(--deep-red-color);
}

.page-index__promo-box .page-index__btn--primary {
  margin-top: 25px;
  background: var(--deep-red-color); /* Nút trong promo box dùng màu đỏ */
  color: #fff;
  box-shadow: 0 4px 15px rgba(122, 14, 14, 0.4);
}

.page-index__promo-box .page-index__btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(122, 14, 14, 0.6);
}

.page-index__registration-tutorial p,
.page-index__faq-section p {
  text-align: justify;
  margin-bottom: 15px;
}

.page-index__contact-info {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Mobile responsive styles */
@media (max-width: 768px) {
  .page-index__article-wrap {
    padding: 0 15px !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  /* 1. Top section (Module 0) */
  .page-index__top-section {
    padding-top: 10px !important;
    padding-bottom: 20px !important;
  }
  .page-index__page-title {
    font-size: 2em !important;
    margin-bottom: 15px !important;
  }
  .page-index__lead-text {
    font-size: 1em !important;
    margin-bottom: 20px !important;
  }
  .page-index__top-cta {
    flex-direction: column !important;
    gap: 10px !important;
  }
  .page-index__btn {
    width: 100% !important;
    max-width: 100% !important;
    padding: 12px 15px !important;
    font-size: 1em !important;
    min-height: 40px !important;
  }

  /* 2. Single column long text container */
  .page-index__section {
    padding: 20px 0 !important;
    margin-bottom: 10px !important;
  }
  .page-index__section-title {
    font-size: 1.8em !important;
    margin-bottom: 20px !important;
  }
  .page-index__sub-title {
    font-size: 1.3em !important;
    margin-top: 25px !important;
    margin-bottom: 10px !important;
  }
  .page-index__info-card,
  .page-index__warning-card,
  .page-index__promo-box {
    padding: 20px !important;
    margin-top: 20px !important;
    margin-bottom: 20px !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }
  .page-index__card-title {
    font-size: 1.2em !important;
    margin-bottom: 10px !important;
  }
  .page-index__promo-box .page-index__box-title {
    font-size: 1.5em !important;
  }

  /* 3. General images and figures */
  .page-index img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }
  .page-index__wp-caption {
    margin: 20px auto !important;
    padding: 8px !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }
  .page-index__figcaption {
    font-size: 0.85em !important;
  }

  /* 4. Buttons and button containers */
  .page-index__cta-buttons {
    flex-direction: column !important;
    gap: 10px !important;
    margin-top: 20px !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 0;
    padding-right: 0;
  }
  .page-index__cta-buttons .page-index__btn {
    width: 100% !important;
    max-width: 100% !important;
    padding: 12px 15px !important;
    font-size: 1em !important;
    min-height: 40px !important;
  }

  /* 5. Registration tutorial and FAQ blocks */
  .page-index__registration-tutorial p,
  .page-index__faq-section p {
    text-align: left !important; /* Mobile friendly */
    font-size: 0.95em !important;
  }
  .page-index__blockquote {
    padding: 15px 20px !important;
    margin: 20px 0 !important;
  }
  .page-index__contact-info {
    margin-top: 30px !important;
    padding-top: 15px !important;
  }
  .page-index__contact-list li {
    font-size: 0.95em !important;
  }
}