:root {
    --header-offset: 120px; 
    --blog-list-bg: #f0f2f5;
    --blog-list-card-bg: #ffffff;
    --blog-list-title-color: #2c3e50;
    --blog-list-summary-color: #555555;
    --blog-list-date-color: #7f8c8d;
    --blog-list-link-color: #e67e22; 
    --blog-list-timeline-line: #bdc3c7;
    --blog-list-border-radius: 8px;
    --blog-list-shadow-light: 0 4px 12px rgba(0, 0, 0, 0.08);
    --blog-list-shadow-hover: 0 8px 20px rgba(0, 0, 0, 0.15);
  }

  .blog-list {
    padding-top: var(--header-offset, 120px);
    background-color: var(--blog-list-bg);
    padding-bottom: 40px;
  }

  .blog-list__section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 15px;
    text-align: center;
  }

  .blog-list__title {
    font-size: 2.5em;
    color: var(--blog-list-title-color);
    margin-bottom: 15px;
    font-weight: 700;
    line-height: 1.2;
  }

  .blog-list__description {
    font-size: 1.1em;
    color: var(--blog-list-summary-color);
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
  }

  .blog-list__timeline {
    position: relative;
    padding: 20px 0;
    margin-top: 20px;
  }

  .blog-list__timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background-color: var(--blog-list-timeline-line);
    z-index: 0;
  }

  .blog-list__timeline-item {
    position: relative;
    margin-bottom: 60px; 
    padding: 0 15px; 
  }

  .blog-list__timeline-date {
    position: absolute;
    top: 0; 
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--blog-list-link-color);
    color: #ffffff;
    padding: 5px 15px;
    border-radius: var(--blog-list-border-radius);
    font-size: 0.9em;
    font-weight: 600;
    white-space: nowrap;
    z-index: 1;
    box-shadow: var(--blog-list-shadow-light);
  }

  .blog-list__card {
    background-color: var(--blog-list-card-bg);
    border-radius: var(--blog-list-border-radius);
    box-shadow: var(--blog-list-shadow-light);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    width: 100%; 
    max-width: 500px; 
    margin: 60px auto 0 auto; 
    position: relative;
  }

  .blog-list__card:hover {
    transform: translateY(-5px);
    box-shadow: var(--blog-list-shadow-hover);
  }

  .blog-list__card-image-link {
    display: block;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%; 
    position: relative;
    overflow: hidden;
  }

  .blog-list__card-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-top-left-radius: var(--blog-list-border-radius);
    border-top-right-radius: var(--blog-list-border-radius);
  }

  .blog-list__card-content {
    padding: 20px;
    text-align: left;
  }

  .blog-list__card-title {
    font-size: 1.4em;
    margin-bottom: 10px;
    line-height: 1.3;
    font-weight: 600;
  }

  .blog-list__card-title-link {
    color: var(--blog-list-title-color);
    text-decoration: none;
    transition: color 0.3s ease;
  }

  .blog-list__card-title-link:hover {
    color: var(--blog-list-link-color);
  }

  .blog-list__card-summary {
    font-size: 0.95em;
    color: var(--blog-list-summary-color);
    line-height: 1.5;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .blog-list__card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 15px;
    padding-top: 10px;
    border-top: 1px solid #eee;
  }

  .blog-list__card-date {
    font-size: 0.85em;
    color: var(--blog-list-date-color);
  }

  .blog-list__card-link {
    display: inline-block;
    background-color: var(--blog-list-link-color);
    color: #ffffff;
    padding: 8px 15px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 0.9em;
    font-weight: 500;
    transition: background-color 0.3s ease;
  }

  .blog-list__card-link:hover {
    background-color: #d35400; 
  }

  
  @media (min-width: 768px) {
    .blog-list__timeline-item {
      display: flex; 
      justify-content: space-between; 
      margin-bottom: 80px;
      padding: 0; 
    }

    .blog-list__timeline-item:nth-child(odd) {
      flex-direction: row; 
    }

    .blog-list__timeline-item:nth-child(even) {
      flex-direction: row-reverse; 
    }

    .blog-list__card {
      width: 45%; 
      max-width: none;
      margin: 0; 
      position: relative; 
    }

    .blog-list__timeline-date {
      top: 50%;
      transform: translate(-50%, -50%);
      left: 50%;
      padding: 8px 20px;
      font-size: 1em;
    }

    
    .blog-list__timeline-date::after {
      content: '';
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 14px;
      height: 14px;
      background-color: var(--blog-list-link-color);
      border: 3px solid #fff;
      border-radius: 50%;
      z-index: -1;
    }

    
    .blog-list__timeline-item:nth-child(odd) .blog-list__card::before {
      content: '';
      position: absolute;
      right: -15px; 
      top: 50%; 
      transform: translateY(-50%);
      width: 0;
      height: 0;
      border-top: 15px solid transparent;
      border-bottom: 15px solid transparent;
      border-left: 15px solid var(--blog-list-card-bg);
      z-index: 2;
    }

    
    .blog-list__timeline-item:nth-child(even) .blog-list__card::before {
      content: '';
      position: absolute;
      left: -15px; 
      top: 50%; 
      transform: translateY(-50%);
      width: 0;
      height: 0;
      border-top: 15px solid transparent;
      border-bottom: 15px solid transparent;
      border-right: 15px solid var(--blog-list-card-bg);
      z-index: 2;
    }

    
    .blog-list__card-meta .blog-list__card-date {
        display: none;
    }
  }

  @media (min-width: 1024px) {
    .blog-list__title {
      font-size: 3em;
    }
    .blog-list__card-title {
      font-size: 1.6em;
    }
  }