.blog-list {
  font-family: Arial, sans-serif;
  color: #333;
  line-height: 1.6;
  padding-top: var(--header-offset, 120px);
  padding-bottom: 40px;
  background-color: #f9f9f9;
}

.blog-list__hero {
  text-align: center;
  padding: 40px 20px;
  background-color: #003366;
  color: #fff;
  margin-bottom: 40px;
}

.blog-list__main-title {
  font-size: 2.5em;
  margin-bottom: 15px;
  color: #ffcc00;
  font-weight: bold;
}

.blog-list__description {
  font-size: 1.1em;
  max-width: 800px;
  margin: 0 auto;
  color: #f0f0f0;
}

.blog-list__timeline {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

.blog-list__timeline::after {
  content: '';
  position: absolute;
  width: 4px;
  background-color: #ffcc00;
  top: 0;
  bottom: 0;
  left: 50%;
  margin-left: -2px;
  z-index: 0;
}

.blog-list__item {
  padding: 10px 0;
  position: relative;
  width: 50%;
  left: 0;
  margin-bottom: 40px;
  z-index: 1;
}

.blog-list__item:nth-child(even) {
  left: 50%;
}

.blog-list__item-content {
  padding: 25px;
  background-color: #fff;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid #eee;
  position: relative;
}

.blog-list__item:hover .blog-list__item-content {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.blog-list__item::before {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  background-color: #ffcc00;
  border: 3px solid #003366;
  border-radius: 50%;
  z-index: 1;
  top: 35px;
  transform: translateX(-50%);
}

.blog-list__item:nth-child(odd)::before {
  right: -53px;
}

.blog-list__item:nth-child(even)::before {
  left: -13px;
}

.blog-list__item:nth-child(odd) .blog-list__item-content {
  margin-right: 40px;
}

.blog-list__item:nth-child(even) .blog-list__item-content {
  margin-left: 40px;
}

.blog-list__image {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 15px;
  display: block;
}

.blog-list__title {
  font-size: 20px;
  font-weight: bold;
  margin-bottom: 10px;
  line-height: 1.3;
}

.blog-list__title-link {
  color: #003366;
  text-decoration: none;
  transition: color 0.3s ease;
}

.blog-list__title-link:hover {
  color: #ffcc00;
}

.blog-list__summary {
  font-size: 15px;
  color: #555;
  margin-bottom: 15px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

.blog-list__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 15px;
  gap: 10px;
}

.blog-list__date {
  font-size: 13px;
  color: #666;
  white-space: nowrap;
}

.blog-list__keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.blog-list__keyword {
  background-color: #d0e0ff;
  color: #003366;
  padding: 4px 8px;
  border-radius: 5px;
  font-size: 12px;
  white-space: nowrap;
}

.blog-list__read-more {
  display: inline-block;
  background-color: #003366;
  color: #fff;
  padding: 10px 20px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  transition: background-color 0.3s ease, transform 0.3s ease;
  font-size: 14px;
}

.blog-list__read-more:hover {
  background-color: #004488;
  transform: translateY(-2px);
}

@media (max-width: 1024px) {
  .blog-list__timeline::after {
    left: 20px;
  }

  .blog-list__item {
    width: 100%;
    left: 0;
    padding-left: 60px;
    margin-bottom: 30px;
  }

  .blog-list__item:nth-child(even) {
    left: 0;
  }

  .blog-list__item::before {
    left: 20px;
    transform: translateX(-50%);
    top: 35px;
  }
  
  .blog-list__item:nth-child(odd)::before,
  .blog-list__item:nth-child(even)::before {
    left: 20px;
  }

  .blog-list__item-content {
    margin-left: 0;
    margin-right: 0;
  }
}

@media (max-width: 768px) {
  .blog-list__main-title {
    font-size: 2em;
  }

  .blog-list__description {
    font-size: 1em;
  }

  .blog-list__item-content {
    padding: 20px;
  }

  .blog-list__title {
    font-size: 18px;
  }

  .blog-list__summary {
    font-size: 14px;
    -webkit-line-clamp: 4;
  }

  .blog-list__read-more {
    padding: 8px 15px;
    font-size: 13px;
  }

  .blog-list__timeline {
    padding: 10px;
  }

  .blog-list__timeline::after {
    left: 15px;
  }

  .blog-list__item {
    padding-left: 50px;
  }

  .blog-list__item::before {
    left: 15px;
    top: 30px;
    width: 18px;
    height: 18px;
  }
}

@media (max-width: 480px) {
  .blog-list__hero {
    padding: 30px 15px;
  }

  .blog-list__main-title {
    font-size: 1.8em;
  }

  .blog-list__description {
    font-size: 0.9em;
  }

  .blog-list__item-content {
    padding: 15px;
  }

  .blog-list__title {
    font-size: 16px;
  }

  .blog-list__summary {
    font-size: 13px;
    -webkit-line-clamp: 5;
  }

  .blog-list__read-more {
    display: block;
    text-align: center;
    margin-top: 10px;
  }

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