.blog-detail {
  padding-top: 10px;
  padding-bottom: 40px;
  background-color: #f9f9f9;
  font-family: Arial, sans-serif;
  color: #333;
}

.blog-detail__post {
  max-width: 800px;
  margin: 20px auto;
  background-color: #ffffff;
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.blog-detail__header {
  margin-bottom: 20px;
}

.blog-detail__title {
  font-size: 38px;
  font-weight: bold;
  color: #2c3e50;
  line-height: 1.2;
  margin-bottom: 15px;
}

.blog-detail__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  font-size: 14px;
  color: #7f8c8d;
  margin-bottom: 20px;
}

.blog-detail__date {
  margin-right: 20px;
  white-space: nowrap;
}

.blog-detail__keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 5px;
}

.blog-detail__keyword-label {
  font-weight: bold;
  color: #555;
  margin-right: 5px;
}

.blog-detail__keyword {
  display: inline-block;
  background-color: #ecf0f1;
  color: #34495e;
  padding: 5px 10px;
  border-radius: 5px;
  text-decoration: none;
  font-size: 13px;
  transition: background-color 0.3s ease;
}

.blog-detail__keyword:hover {
  background-color: #dfe6e9;
  color: #2c3e50;
}

.blog-detail__cover {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 30px;
  display: block;
}

.blog-detail__content {
  font-size: 17px;
  line-height: 1.7;
  color: #333;
}

.blog-detail__content h2 {
  font-size: 28px;
  color: #2c3e50;
  margin-top: 30px;
  margin-bottom: 15px;
  font-weight: bold;
  line-height: 1.3;
}

.blog-detail__content h3 {
  font-size: 24px;
  color: #34495e;
  margin-top: 25px;
  margin-bottom: 12px;
  font-weight: bold;
  line-height: 1.4;
}

.blog-detail__content h4 {
  font-size: 20px;
  color: #34495e;
  margin-top: 20px;
  margin-bottom: 10px;
  font-weight: bold;
}

.blog-detail__content p {
  margin-bottom: 18px;
}

.blog-detail__content ul,
.blog-detail__content ol {
  margin-bottom: 18px;
  padding-left: 25px;
}

.blog-detail__content li {
  margin-bottom: 8px;
}

.blog-detail__content a {
  color: #3498db;
  text-decoration: none;
}

.blog-detail__content a:hover {
  text-decoration: underline;
}

.blog-detail__content strong {
  font-weight: bold;
}

.blog-detail__related-posts {
  max-width: 800px;
  margin: 40px auto 20px auto;
  padding: 30px;
  background-color: #ffffff;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.blog-detail__related-title {
  font-size: 28px;
  color: #2c3e50;
  margin-bottom: 25px;
  text-align: center;
  font-weight: bold;
}

.blog-detail__related-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.blog-detail__related-item {
  background-color: #fefefe;
  border: 1px solid #eee;
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.blog-detail__related-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.blog-detail__related-link {
  display: block;
  padding: 15px;
  text-decoration: none;
  color: inherit;
}

.blog-detail__related-item-title {
  font-size: 18px;
  color: #2c3e50;
  margin-bottom: 8px;
  line-height: 1.4;
}

.blog-detail__related-item-summary {
  font-size: 14px;
  color: #7f8c8d;
  line-height: 1.5;
}

.blog-detail__sidebar {
  max-width: 800px;
  margin: 20px auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  padding: 0 30px;
}

@media (min-width: 992px) {
  .blog-detail {
    display: flex;
    justify-content: center;
    padding-top: 10px;
    padding-bottom: 40px;
  }

  .blog-detail__post,
  .blog-detail__related-posts {
    margin: 20px 0;
    flex-basis: 65%;
    max-width: 800px;
  }

  .blog-detail__sidebar {
    flex-basis: 30%;
    margin: 20px 0 20px 30px;
    padding: 0;
    max-width: 350px;
    grid-template-columns: 1fr;
  }
}

.blog-detail__ad-banner {
  background-color: #e74c3c;
  color: #ffffff;
  padding: 20px;
  border-radius: 8px;
  text-align: center;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.blog-detail__ad-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.blog-detail__ad-title {
  font-size: 24px;
  margin-bottom: 10px;
  font-weight: bold;
  line-height: 1.2;
}

.blog-detail__ad-text {
  font-size: 16px;
  margin-bottom: 15px;
  line-height: 1.5;
}

.blog-detail__ad-button {
  background-color: #f1c40f;
  color: #2c3e50;
  border: none;
  padding: 12px 25px;
  border-radius: 5px;
  font-size: 18px;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.blog-detail__ad-button:hover {
  background-color: #f39c12;
}

.blog-detail__popular-posts {
  background-color: #ffffff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.blog-detail__popular-title {
  font-size: 22px;
  color: #2c3e50;
  margin-bottom: 15px;
  font-weight: bold;
  text-align: center;
}

.blog-detail__popular-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.blog-detail__popular-item {
  margin-bottom: 10px;
  border-bottom: 1px dashed #eee;
  padding-bottom: 10px;
}

.blog-detail__popular-item:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.blog-detail__popular-link {
  font-size: 16px;
  color: #34495e;
  text-decoration: none;
  display: block;
  transition: color 0.3s ease;
}

.blog-detail__popular-link:hover {
  color: #3498db;
  text-decoration: underline;
}

@media (max-width: 768px) {
  .blog-detail__post {
    margin: 10px auto;
    padding: 20px;
  }

  .blog-detail__title {
    font-size: 28px;
  }

  .blog-detail__meta {
    flex-direction: column;
    align-items: flex-start;
  }

  .blog-detail__date {
    margin-right: 0;
    margin-bottom: 10px;
  }

  .blog-detail__keywords {
    margin-top: 0;
  }

  .blog-detail__cover {
    max-height: 250px;
    margin-bottom: 20px;
  }

  .blog-detail__content {
    font-size: 16px;
    line-height: 1.6;
  }

  .blog-detail__content h2 {
    font-size: 24px;
    margin-top: 25px;
    margin-bottom: 12px;
  }

  .blog-detail__content h3 {
    font-size: 20px;
    margin-top: 20px;
    margin-bottom: 10px;
  }

  .blog-detail__related-posts {
    margin: 30px auto 10px auto;
    padding: 20px;
  }

  .blog-detail__related-title {
    font-size: 24px;
    margin-bottom: 20px;
  }

  .blog-detail__related-item-title {
    font-size: 16px;
  }

  .blog-detail__related-item-summary {
    font-size: 13px;
  }

  .blog-detail__sidebar {
    margin: 10px auto;
    padding: 0 20px;
  }

  .blog-detail__ad-title {
    font-size: 20px;
  }

  .blog-detail__ad-text {
    font-size: 14px;
  }

  .blog-detail__ad-button {
    padding: 10px 20px;
    font-size: 16px;
  }

  .blog-detail__popular-title {
    font-size: 20px;
  }
}