/* 自然生态风格 */
:root {
    --primary: #4a8f29;
    --secondary: #8f6b29;
    --light-bg: #f8f9f5;
    --dark-text: #2d3436;
    --light-text: #636e72;
    --border-color: #d1d9d7;
    --highlight: #e8f5e9;
  }
  
  * {
    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: 1.6;
    background-image: url('data:image/svg+xml;utf8,<svg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"><path d="M0 0h100v100H0z" fill="none"/><path d="M20 20h60v60H20z" stroke="%23d1d9d7" stroke-width="1" fill="none"/></svg>');
    background-size: 100px 100px;
  }
  
  /* 自然生态头部 */
  .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: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
  
  .site-title:before {
    content: "🌿";
    font-size: 1.5rem;
  }
  
  /* 自然生态导航 */
  .nature-nav ul {
    display: flex;
    list-style: none;
    gap: 1.5rem;
  }
  
  .nature-nav a {
    color: var(--dark-text);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    transition: all 0.3s ease;
  }
  
  .nature-nav a:hover {
    color: var(--primary);
    background-color: var(--highlight);
  }
  
  /* 自然生态内容区 */
  .main-container {
    max-width: 1200px;
    margin: 3rem auto;
    padding: 0 2rem;
  }
  
  /* 自然生态卡片 */
  .nature-card {
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
  }
  
  .nature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
  }
  
  .card-image {
    height: 200px;
    overflow: hidden;
    position: relative;
  }
  
  .card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
  }
  
  .nature-card:hover .card-image img {
    transform: scale(1.05);
  }
  
  .card-content {
    padding: 1.5rem;
  }
  
  .card-title {
    font-size: 1.25rem;
    margin-bottom: 0.8rem;
    color: var(--primary);
  }
  
  .card-desc {
    color: var(--light-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;
  }
  
  /* 自然生态网格布局 */
  .nature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
  }
  
  /* 自然生态分类标题 */
  .section-heading {
    position: relative;
    margin: 4rem 0 2rem;
  }
  
  .section-title {
    font-size: 2rem;
    font-weight: 600;
    color: var(--primary);
    position: relative;
    display: inline-block;
  }
  
  .section-title:after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: var(--secondary);
    border-radius: 3px;
  }
  
  /* 自然生态分页 */
  .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: 45px;
    height: 45px;
    border-radius: 5px;
    background-color: white;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
  }
  
  .nature-pagination a:hover {
    background-color: var(--primary);
    color: white;
    transform: translateY(-3px);
  }
  
  /* 自然生态文章详情 */
  .nature-article {
    background-color: white;
    border-radius: 8px;
    padding: 3rem;
    margin: 3rem 0;
    box-shadow: 0 3px 10px rgba(0,0,0,0.05);
    border: 1px solid var(--border-color);
  }
  
  .article-header {
    text-align: center;
    margin-bottom: 2.5rem;
  }
  
  .article-title {
    font-size: 2.5rem;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--primary);
  }
  
  .article-subtitle {
    color: var(--light-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;
    border-radius: 8px;
    overflow: hidden;
  }
  
  .article-image img {
    width: 100%;
    height: auto;
    display: block;
  }
  
  .article-body {
    line-height: 1.8;
    font-size: 1.1rem;
    color: var(--dark-text);
  }
  
  .article-body img {
    max-width: 100%;
    height: auto;
    margin: 2rem auto;
    display: block;
    border-radius: 8px;
  }
  
  .article-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
  }
  
  .article-navigation a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
  }
  
  .article-navigation a:hover {
    background-color: var(--primary);
    color: white;
    transform: translateY(-3px);
  }
  
  /* 自然生态友情链接 */
  .nature-links {
    background-color: white;
    border-radius: 8px;
    padding: 2.5rem;
    margin: 3rem 0;
    box-shadow: 0 3px 10px rgba(0,0,0,0.05);
    border: 1px solid var(--border-color);
  }
  
  .links-title {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--primary);
    text-align: center;
  }
  
  .links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
  }
  
  .link-item {
    background-color: var(--highlight);
    border-radius: 8px;
    padding: 1.2rem;
    text-align: center;
    transition: all 0.3s ease;
  }
  
  .link-item:hover {
    background-color: var(--primary);
    transform: translateY(-5px);
  }
  
  .link-item a {
    color: var(--dark-text);
    text-decoration: none;
    font-weight: 500;
    display: block;
  }
  
  .link-item:hover a {
    color: white;
  }
  
  /* 自然生态页脚 */
  .nature-footer {
    background-color: var(--light-bg);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0;
    text-align: center;
  }
  
  .footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
  }
  
  .copyright {
    margin-top: 2rem;
    color: var(--light-text);
    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;
    }
    
    .nature-article {
      padding: 2rem 1.5rem;
    }
    
    .article-title {
      font-size: 1.8rem;
    }
    
    .article-meta {
      flex-direction: column;
      gap: 1rem;
    }
    
    .links-grid {
      grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
  }