:root {
      --primary-color: #0056b3; 
      --secondary-color: #e60023; 
      --text-color-dark: #333333;
      --text-color-medium: #666666;
      --text-color-light: #999999;
      --background-light: #f8f8f8;
      --card-background: #ffffff;
      --border-color: #e0e0e0;
      --shadow-light: rgba(0, 0, 0, 0.08);
      --shadow-hover: rgba(0, 0, 0, 0.15);
      --header-offset: 120px; 
    }

    .blog-list {
      max-width: 1200px;
      margin: 0 auto;
      padding: var(--header-offset, 120px) 20px 40px; 
      font-family: Arial, sans-serif;
      color: var(--text-color-dark);
      background-color: var(--background-light);
    }

    .blog-list__heading {
      text-align: center;
      margin-bottom: 40px;
      font-size: 2.5em;
      color: var(--text-color-dark);
      font-weight: bold;
    }

    .blog-list__description {
      text-align: center;
      max-width: 800px;
      margin: -20px auto 60px;
      font-size: 1.1em;
      line-height: 1.6;
      color: var(--text-color-medium);
    }

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

    .blog-list__timeline::before {
      content: '';
      position: absolute;
      top: 0;
      left: 50%;
      width: 4px;
      height: 100%;
      background: var(--border-color);
      transform: translateX(-50%);
      z-index: 1;
    }

    .blog-list__item {
      display: flex;
      justify-content: space-between;
      margin-bottom: 40px;
      position: relative;
      width: 100%;
      padding-left: calc(50% + 30px); 
      min-height: 150px; 
    }

    .blog-list__item:nth-child(even) {
      padding-left: 0;
      padding-right: calc(50% + 30px);
      justify-content: flex-start;
    }

    .blog-list__item::after {
      content: '';
      position: absolute;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      width: 20px;
      height: 20px;
      background: var(--primary-color);
      border: 4px solid var(--card-background);
      border-radius: 50%;
      z-index: 2;
    }

    .blog-list__date {
      position: absolute;
      width: calc(50% - 40px); 
      top: 25px; 
      font-size: 0.9em;
      color: var(--text-color-light);
      text-align: right;
      left: 0;
      padding-right: 20px;
      box-sizing: border-box;
    }

    .blog-list__item:nth-child(even) .blog-list__date {
      left: auto;
      right: 0;
      text-align: left;
      padding-left: 20px;
      padding-right: 0;
    }

    .blog-list__content-wrapper {
      width: calc(50% - 30px); 
      background-color: var(--card-background);
      border-radius: 12px;
      box-shadow: 0 4px 12px var(--shadow-light);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      padding: 20px;
      position: relative; 
    }

    .blog-list__content-wrapper:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px var(--shadow-hover);
    }

    .blog-list__item:nth-child(even) .blog-list__content-wrapper {
      margin-left: auto; 
    }

    
    .blog-list__content-wrapper::before {
      content: '';
      position: absolute;
      top: 30px;
      width: 0;
      height: 0;
      border-top: 10px solid transparent;
      border-bottom: 10px solid transparent;
      border-right: 10px solid var(--card-background);
      left: -10px; 
    }

    .blog-list__item:nth-child(even) .blog-list__content-wrapper::before {
      border-right: none;
      border-left: 10px solid var(--card-background);
      left: auto;
      right: -10px; 
    }

    .blog-list__image-wrapper {
      width: 100%;
      padding-bottom: 56.25%; 
      position: relative;
      margin-bottom: 15px;
      border-radius: 8px;
      overflow: hidden;
    }

    .blog-list__image {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .blog-list__title {
      font-size: 1.3em; 
      font-weight: bold;
      margin-bottom: 10px;
      line-height: 1.4;
    }

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

    .blog-list__title-link:hover {
      color: var(--primary-color);
    }

    .blog-list__summary {
      font-size: 0.95em; 
      color: var(--text-color-medium);
      line-height: 1.6;
      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;
      margin-top: 10px;
      color: var(--primary-color);
      text-decoration: none;
      font-weight: bold;
      transition: color 0.3s ease;
      font-size: 0.9em;
    }

    .blog-list__read-more:hover {
      color: #003d82; 
      text-decoration: underline;
    }

    
    @media (max-width: 1024px) {
      .blog-list__heading {
        font-size: 2em;
      }
      .blog-list__description {
        font-size: 1em;
      }
      .blog-list__item {
        padding-left: calc(50% + 20px); 
      }
      .blog-list__item:nth-child(even) {
        padding-right: calc(50% + 20px);
      }
      .blog-list__timeline::before,
      .blog-list__item::after {
        left: 20px; 
        transform: translateX(0);
      }
      .blog-list__date {
        top: 20px;
        width: auto;
        left: 50px; 
        text-align: left;
        padding-left: 0;
        padding-right: 0;
      }
      .blog-list__item:nth-child(even) .blog-list__date {
        left: 50px;
        right: auto;
        text-align: left;
      }
      .blog-list__content-wrapper {
        width: calc(100% - 70px); 
        margin-left: 50px; 
      }
      .blog-list__item:nth-child(even) .blog-list__content-wrapper {
        margin-left: 50px;
        margin-right: auto;
      }
      .blog-list__content-wrapper::before {
        left: 40px; 
        border-right: 10px solid var(--card-background);
        border-left: none;
      }
      .blog-list__item:nth-child(even) .blog-list__content-wrapper::before {
        left: 40px; 
        border-right: 10px solid var(--card-background);
        border-left: none;
      }
    }

    @media (max-width: 768px) {
      .blog-list {
        padding-left: 15px;
        padding-right: 15px;
      }
      .blog-list__heading {
        font-size: 1.8em;
      }
      .blog-list__description {
        font-size: 0.95em;
        margin-bottom: 40px;
      }
      .blog-list__timeline::before,
      .blog-list__item::after {
        left: 20px;
      }
      .blog-list__item {
        padding-left: 0;
        padding-right: 0;
        justify-content: flex-start;
        flex-direction: column;
        align-items: flex-start;
        margin-bottom: 30px;
      }
      .blog-list__item:nth-child(even) {
        padding-left: 0;
        padding-right: 0;
      }

      .blog-list__date {
        position: relative;
        left: 50px; 
        top: auto;
        width: auto;
        text-align: left;
        margin-bottom: 10px;
        order: 1; 
      }
      .blog-list__item:nth-child(even) .blog-list__date {
        left: 50px;
        right: auto;
        text-align: left;
      }

      .blog-list__content-wrapper {
        width: calc(100% - 70px); 
        margin-left: 50px; 
        order: 2; 
      }
      .blog-list__item:nth-child(even) .blog-list__content-wrapper {
        margin-left: 50px;
        margin-right: auto;
      }
      .blog-list__content-wrapper::before {
        left: 40px; 
        border-right: 10px solid var(--card-background);
        border-left: none;
      }
      .blog-list__item:nth-child(even) .blog-list__content-wrapper::before {
        left: 40px; 
        border-right: 10px solid var(--card-background);
        border-left: none;
      }

      .blog-list__title {
        font-size: 1.2em;
      }
      .blog-list__summary {
        font-size: 0.9em;
      }
    }

    @media (max-width: 480px) {
      .blog-list {
        padding-top: var(--header-offset, 120px);
        padding-left: 10px;
        padding-right: 10px;
      }
      .blog-list__heading {
        font-size: 1.5em;
        margin-bottom: 30px;
      }
      .blog-list__description {
        font-size: 0.85em;
        margin-bottom: 30px;
      }
      .blog-list__timeline::before,
      .blog-list__item::after {
        left: 15px; 
      }
      .blog-list__date {
        left: 40px;
        font-size: 0.8em;
      }
      .blog-list__content-wrapper {
        width: calc(100% - 55px); 
        margin-left: 40px; 
        padding: 15px;
      }
      .blog-list__content-wrapper::before {
        left: 30px; 
      }
      .blog-list__title {
        font-size: 1.1em;
      }
      .blog-list__summary {
        font-size: 0.85em;
        -webkit-line-clamp: 4; 
      }
    }