/* 自然极简风格 */
:root {
    --primary: #4a6b57;
    --secondary: #8ba888;
    --light-bg: #f8f8f5;
    --dark-text: #333333;
    --border-color: #d8d8d0;
    --highlight: #e8e8e0;
    --accent: #a5c4a3;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Noto Sans', 'Helvetica Neue', Arial, sans-serif;
  }
  
  body {
    background-color: var(--light-bg);
    color: var(--dark-text);
    line-height: 1.8;
    font-size: 16px;
  }
  
  /* 自然风格头部 */
  .nature-header {
    background-color: var(--light-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
  }
  
  .header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .site-title {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--primary);
    text-decoration: none;
    letter-spacing: 1px;
    position: relative;
  }
  
  .site-title:after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: var(--primary);
  }
  
  /* 自然风格导航 */
  .nature-nav ul {
    display: flex;
    list-style: none;
    gap: 1.5rem;
  }
  
  .nature-nav a {
    color: var(--dark-text);
    text-decoration: none;
    font-weight: 400;
    font-size: 1rem;
    transition: all 0.3s ease;
    padding: 0.5rem 0;
    position: relative;
  }
  
  .nature-nav a:before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--primary);
    transition: width 0.3s ease;
  }
  
  .nature-nav a:hover {
    color: var(--primary);
  }
  
  .nature-nav a:hover:before {
    width: 100%;
  }
  
  /* 自然风格内容区 */
  .main-container {
    max-width: 1200px;
    margin: 3rem auto;
    padding: 0 2rem;
  }
  
  /* 自然风格网格布局 */
  .nature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
  }
  
  /* 自然风格卡片 */
  .nature-card {
    background-color: var(--light-bg);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
  }
  
  .nature-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 1px solid var(--border-color);
    pointer-events: none;
  }
  
  .card-image {
    height: 200px;
    overflow: hidden;
  }
  
  .card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
    filter: brightness(0.98) contrast(1.05);
  }
  
  .nature-card:hover .card-image img {
    transform: scale(1.03);
  }
  
  .card-content {
    padding: 1.5rem;
  }
  
  .card-title {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    font-weight: 500;
    line-height: 1.4;
    color: var(--primary);
  }
  
  .card-desc {
    color: var(--dark-text);
    margin-bottom: 1.2rem;
    font-size: 0.95rem;
    line-height: 1.6;
  }
  
  .card-footer {
    display: flex;
    justify-content: space-between;
    color: var(--secondary);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
  }
  
  /* 自然风格分类标题 */
  .section-heading {
    margin: 4rem 0 2rem;
  }
  
  .section-title {
    font-size: 1.8rem;
    font-weight: 400;
    color: var(--primary);
    position: relative;
    display: inline-block;
  }
  
  .section-title:after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 2px;
    background-color: var(--primary);
  }
  
  /* 自然风格分页 */
  .nature-pagination {
    display: flex;
    justify-content: center;
    margin: 4rem 0;
    gap: 0.8rem;
  }
  
  .nature-pagination a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: var(--dark-text);
    text-decoration: none;
    font-weight: 400;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
  }
  
  .nature-pagination a:hover {
    background-color: var(--highlight);
    color: var(--primary);
  }
  
  /* 自然风格文章详情 */
  .nature-article {
    margin: 3rem 0;
  }
  
  .article-header {
    margin-bottom: 2.5rem;
  }
  
  .article-title {
    font-size: 2.2rem;
    line-height: 1.3;
    margin-bottom: 1rem;
    font-weight: 400;
    color: var(--primary);
  }
  
  .article-subtitle {
    color: var(--dark-text);
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 2rem;
  }
  
  .article-meta {
    display: flex;
    justify-content: center;
    gap: 2rem;
    color: var(--secondary);
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
  }
  
  .article-image {
    margin: 2rem 0;
  }
  
  .article-image img {
    width: 100%;
    height: auto;
    display: block;
    filter: brightness(0.98) contrast(1.05);
  }
  
  .article-body {
    line-height: 1.8;
    font-size: 1.1rem;
    color: var(--dark-text);
    max-width: 800px;
    margin: 0 auto;
  }
  
  .article-body img {
    max-width: 100%;
    height: auto;
    margin: 2rem auto;
    display: block;
    filter: brightness(0.98) contrast(1.05);
  }
  
  .article-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    max-width: 800px;
    margin: 3rem auto 0;
  }
  
  .article-navigation a {
    color: var(--dark-text);
    text-decoration: none;
    font-weight: 400;
    transition: all 0.3s ease;
  }
  
  .article-navigation a:hover {
    color: var(--primary);
  }
  
  /* 自然风格友情链接 */
  .nature-links {
    margin: 3rem 0;
    max-width: 800px;
    margin: 3rem auto;
  }
  
  .links-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    font-weight: 400;
    text-align: center;
    color: var(--primary);
  }
  
  .links-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }
  
  .links-list a {
    color: var(--dark-text);
    text-decoration: none;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
  }
  
  .links-list a:hover {
    background-color: var(--highlight);
    color: var(--primary);
  }
  
  /* 自然风格页脚 */
  .nature-footer {
    border-top: 1px solid var(--border-color);
    padding: 3rem 0;
    text-align: center;
  }
  
  .copyright {
    margin-top: 2rem;
    color: var(--secondary);
    font-size: 0.9rem;
  }
  
  /* 响应式设计 */
  @media (max-width: 768px) {
    .header-container {
      flex-direction: column;
      gap: 1.5rem;
    }
    
    .nature-nav ul {
      flex-wrap: wrap;
      justify-content: center;
    }
    
    .main-container {
      padding: 0 1.5rem;
    }
    
    .nature-grid {
      grid-template-columns: 1fr;
    }
    
    .article-title {
      font-size: 1.8rem;
    }
    
    .article-meta {
      flex-direction: column;
      gap: 1rem;
    }
  }