:root {
      --primary-text-color: #212529;
      --secondary-text-color: #495057;
      --date-text-color: #6c757d;
      --background-color: #ffffff;
      --card-background-color: #f8f9fa;
      --link-color: #007bff;
      --link-hover-color: #0056b3;
      --timeline-line-color: #e9ecef;
      --timeline-dot-color: #007bff;
      --card-border-radius: 10px;
      --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
      --card-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.15);
      --header-offset: 120px; 
    }

    .blog-list {
      font-family: Arial, sans-serif;
      line-height: 1.6;
      color: var(--primary-text-color);
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
      padding-top: var(--header-offset);
    }

    .blog-list__hero {
      text-align: center;
      margin-bottom: 40px;
      padding: 20px;
    }

    .blog-list__page-title {
      font-size: 2.2em;
      color: var(--primary-text-color);
      margin-bottom: 15px;
      line-height: 1.2;
    }

    .blog-list__description {
      font-size: 1.1em;
      color: var(--secondary-text-color);
      max-width: 800px;
      margin: 0 auto;
    }

    .blog-list__timeline-container {
      position: relative;
      padding: 20px 0;
      padding-left: 100px; 
    }

    .blog-list__timeline-line {
      position: absolute;
      width: 4px;
      background-color: var(--timeline-line-color);
      top: 0;
      bottom: 0;
      left: 60px; 
      z-index: 0;
    }

    .blog-list__item {
      display: flex;
      align-items: flex-start;
      margin-bottom: 40px;
      position: relative;
    }

    .blog-list__date-point {
      position: absolute;
      left: 0; 
      top: 0;
      width: 100px; 
      text-align: right;
      padding-right: 25px; 
      box-sizing: border-box;
      z-index: 1; 
    }

    .blog-list__date-point::after { 
      content: '';
      position: absolute;
      width: 12px;
      height: 12px;
      background-color: var(--timeline-dot-color);
      border-radius: 50%;
      right: 14px; 
      top: 5px;
      transform: translateX(50%); 
      border: 2px solid var(--background-color);
    }

    .blog-list__date {
      display: block;
      font-size: 0.85em;
      font-weight: bold;
      color: var(--date-text-color);
      white-space: nowrap; 
    }

    .blog-list__content-card {
      background-color: var(--card-background-color);
      border-radius: var(--card-border-radius);
      box-shadow: var(--card-shadow);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      padding: 20px;
      width: calc(100% - 100px); 
      display: flex;
      flex-direction: column;
      text-decoration: none;
      color: var(--primary-text-color);
      position: relative;
      z-index: 1;
    }

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

    .blog-list__image-link {
      display: block;
      margin-bottom: 15px;
      border-radius: calc(var(--card-border-radius) - 5px);
      overflow: hidden;
    }

    .blog-list__image {
      width: 100%;
      height: auto;
      aspect-ratio: 16 / 9;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }

    .blog-list__content-card:hover .blog-list__image {
      transform: scale(1.05);
    }

    .blog-list__text-content {
      flex-grow: 1;
    }

    .blog-list__title {
      font-size: 1.25em; 
      font-weight: bold;
      margin-top: 0;
      margin-bottom: 10px;
      line-height: 1.3;
    }

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

    .blog-list__title-link:hover {
      color: var(--link-hover-color);
      text-decoration: underline;
    }

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

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

    .blog-list__read-more:hover {
      background-color: var(--link-hover-color);
    }

    
    @media (min-width: 768px) {
      .blog-list__content-card {
        width: calc(60% - 100px); 
        margin-left: auto; 
        margin-right: auto;
      }
    }

    @media (min-width: 1024px) {
      .blog-list__content-card {
        width: calc(50% - 100px); 
      }
    }

    @media (max-width: 767px) {
      .blog-list {
        padding: 15px;
        padding-top: var(--header-offset);
      }

      .blog-list__hero {
        margin-bottom: 30px;
        padding: 10px;
      }

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

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

      .blog-list__timeline-container {
        padding-left: 60px; 
      }

      .blog-list__timeline-line {
        left: 30px;
      }

      .blog-list__date-point {
        left: 0;
        width: 60px;
        padding-right: 10px;
      }

      .blog-list__date-point::after {
        right: 19px; 
      }

      .blog-list__date {
        font-size: 0.8em;
      }

      .blog-list__content-card {
        width: calc(100% - 60px); 
        padding: 15px;
      }

      .blog-list__title {
        font-size: 1.1em; 
      }

      .blog-list__summary {
        font-size: 0.85em; 
      }

      .blog-list__read-more {
        padding: 6px 12px;
        font-size: 0.8em;
      }
    }

    @media (max-width: 480px) {
      .blog-list__page-title {
        font-size: 1.5em;
      }
    }