.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam {
  font-family: 'Arial', sans-serif;
  color: #1F2D3D; /* Text Main */
  background-color: #F4F7FB; /* Background */
  line-height: 1.6;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__top-section {
  padding-top: 10px; /* Small top padding as body handles --header-offset */
  text-align: center;
  background-color: #F4F7FB;
  padding-bottom: 40px;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__hero-image-wrapper {
  max-width: 1200px;
  margin: 0 auto 20px auto;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__hero-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__main-title {
  font-size: clamp(2.2em, 4vw, 3.2em);
  color: #2F6BFF; /* Primary */
  margin-bottom: 15px;
  line-height: 1.2;
  font-weight: bold;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__lead-paragraph {
  font-size: 1.1em;
  color: #1F2D3D; /* Text Main */
  margin-bottom: 30px;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__top-cta {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__btn {
  display: inline-block;
  padding: 12px 25px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
  box-sizing: border-box;
  max-width: 100%;
  white-space: normal;
  word-wrap: break-word;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__btn-primary {
  background: linear-gradient(180deg, #4A8BFF 0%, #2F6BFF 100%); /* Button */
  color: #ffffff;
  border: 2px solid transparent;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(47, 107, 255, 0.3);
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__btn-secondary {
  background-color: #ffffff; /* Card BG */
  color: #2F6BFF; /* Primary */
  border: 2px solid #2F6BFF; /* Primary */
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__btn-secondary:hover {
  background-color: #e0eaff;
  transform: translateY(-2px);
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__article-wrap {
  display: flex;
  gap: 30px;
  max-width: 1150px;
  margin: 40px auto;
  padding: 0 20px;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__article-content {
  flex: 3;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__sidebar {
  flex: 1;
  min-width: 280px;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__section {
  background-color: #FFFFFF; /* Card BG */
  padding: 30px;
  border-radius: 10px;
  margin-bottom: 30px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__dark-section {
  background-color: #2F6BFF; /* Primary */
  color: #ffffff;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__dark-section h2,
.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__dark-section h3,
.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__dark-section p {
  color: #ffffff;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__section-title {
  font-size: 2em;
  color: #2F6BFF; /* Primary */
  margin-bottom: 20px;
  font-weight: bold;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__dark-section .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__section-title {
  color: #ffffff;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam p {
  margin-bottom: 15px;
  color: #1F2D3D; /* Text Main */
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__dark-section p {
  color: #ffffff;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__figure {
  margin: 25px 0;
  text-align: center;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__image {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
  margin: 0 auto;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__figcaption {
  font-size: 0.9em;
  color: #666;
  margin-top: 10px;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__dark-section .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__figcaption {
  color: #e0e0e0;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__promo-box {
  background: linear-gradient(135deg, #6FA3FF, #2F6BFF); /* Auxiliary to Primary */
  color: #ffffff;
  text-align: center;
  padding: 40px 30px;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__promo-title {
  font-size: 2.2em;
  margin-bottom: 15px;
  color: #ffffff;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__promo-text {
  font-size: 1.1em;
  margin-bottom: 30px;
  color: #ffffff;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__promo-card .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__btn-primary {
  background: #ffffff;
  color: #2F6BFF;
  border: 2px solid #ffffff;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__promo-card .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__btn-primary:hover {
  background: #e0eaff;
  color: #2F6BFF;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__faq-list {
  margin-top: 20px;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__faq-item {
  background-color: #ffffff;
  border: 1px solid #D6E2FF; /* Border */
  border-radius: 8px;
  margin-bottom: 15px;
  overflow: hidden;
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.03);
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  font-weight: bold;
  font-size: 1.1em;
  color: #2F6BFF; /* Primary */
  cursor: pointer;
  list-style: none; /* For details/summary */
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__faq-question::-webkit-details-marker {
  display: none;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__faq-qtext {
  flex-grow: 1;
  color: #1F2D3D; /* Text Main */
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__faq-toggle {
  font-size: 1.5em;
  color: #2F6BFF; /* Primary */
  margin-left: 15px;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__faq-answer {
  padding: 0 25px 20px 25px;
  color: #1F2D3D; /* Text Main */
  font-size: 0.95em;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__faq-answer p {
  margin-bottom: 0;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__sidebar-block {
  background-color: #FFFFFF; /* Card BG */
  padding: 25px;
  border-radius: 10px;
  margin-bottom: 30px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__sidebar-title {
  font-size: 1.5em;
  color: #2F6BFF; /* Primary */
  margin-bottom: 20px;
  font-weight: bold;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__related-posts {
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__related-posts li {
  margin-bottom: 10px;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__related-posts li a {
  color: #1F2D3D; /* Text Main */
  text-decoration: none;
  font-weight: normal;
  transition: color 0.2s ease;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__related-posts li a:hover {
  color: #2F6BFF; /* Primary */
  text-decoration: underline;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__promo-card {
  text-align: center;
  background: linear-gradient(180deg, #4A8BFF 0%, #2F6BFF 100%); /* Button */
  color: #ffffff;
}

.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__promo-card .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__sidebar-title,
.page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__promo-card p {
  color: #ffffff;
}

/* Mobile Responsive Styles */
@media (max-width: 1024px) {
  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__article-wrap {
    flex-direction: column;
    padding: 0 15px;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__article-content,
  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__sidebar {
    flex: auto;
    min-width: unset;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__hero-content {
    padding: 0 15px;
  }
}

@media (max-width: 768px) {
  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam {
    font-size: 16px;
    line-height: 1.6;
  }

  /* 1. Top section title + CTA */
  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__top-section {
    padding-top: 10px !important; /* Specific mobile top padding */
    padding-bottom: 30px;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__main-title {
    font-size: clamp(1.8em, 7vw, 2.5em);
    padding: 0 10px;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__lead-paragraph {
    font-size: 1em;
    padding: 0 10px;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__top-cta {
    flex-direction: column;
    align-items: center;
    padding: 0 15px;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__btn {
    width: 100% !important;
    max-width: 100% !important;
    padding: 12px 15px !important;
    font-size: 1em;
  }

  /* 2. Single column long text container */
  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__article-wrap {
    padding: 0 15px !important;
    margin: 30px auto !important;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__section {
    padding: 20px 15px !important;
    margin-bottom: 20px;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__section-title {
    font-size: 1.6em;
    margin-bottom: 15px;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam p {
    font-size: 0.95em;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__promo-box {
    padding: 30px 15px !important;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__promo-title {
    font-size: 1.8em;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__promo-text {
    font-size: 1em;
  }

  /* 3. General images and figure */
  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__hero-image-wrapper,
  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__figure {
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    overflow: hidden !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__image,
  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__hero-image {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__figcaption {
    font-size: 0.85em;
  }

  /* 4. Buttons and button containers (covered in top-cta and general .btn) */
  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__cta-buttons {
    flex-direction: column;
    gap: 10px;
    padding: 0 15px;
  }

  /* 5. FAQ block */
  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__faq-question {
    padding: 15px 20px !important;
    font-size: 1em;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__faq-answer {
    padding: 0 20px 15px 20px !important;
    font-size: 0.9em;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__sidebar-block {
    padding: 20px 15px !important;
    margin-bottom: 20px;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__sidebar-title {
    font-size: 1.3em;
  }

  .page-blog-lich-su-va-van-hoa-da-ga-tai-viet-nam__related-posts li a {
    font-size: 0.95em;
  }
}