/* 复古像素风格 */
:root {
    --primary: #ff4d4d;
    --secondary: #4dff4d;
    --tertiary: #4d4dff;
    --dark-bg: #1a1a1a;
    --light-bg: #2d2d2d;
    --text-color: #e0e0e0;
    --pixel-border: 4px solid #000;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Press Start 2P', 'Courier New', monospace;
    image-rendering: pixelated;
  }
  
  body {
    background-color: var(--dark-bg);
    color: var(--text-color);
    line-height: 1.6;
    background-image: 
      linear-gradient(transparent 31px, rgba(255,255,255,0.1) 32px),
      linear-gradient(90deg, transparent 31px, rgba(255,255,255,0.1) 32px);
    background-size: 32px 32px;
  }
  
  /* 像素风格头部 */
  .pixel-header {
    background-color: var(--light-bg);
    border-bottom: var(--pixel-border);
    padding: 1rem 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;
    color: var(--primary);
    text-decoration: none;
    text-shadow: 4px 4px 0 #000;
    position: relative;
  }
  
  .site-title:before {
    content: "▶";
    position: absolute;
    left: -1.5rem;
    animation: blink 1s steps(1) infinite;
  }
  
  @keyframes blink {
    50% { opacity: 0; }
  }
  
  /* 像素风格导航 */
  .pixel-nav ul {
    display: flex;
    list-style: none;
    gap: 1rem;
  }
  
  .pixel-nav a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    border: var(--pixel-border);
    background-color: var(--light-bg);
    position: relative;
    transition: all 0.1s ease;
  }
  
  .pixel-nav a:hover {
    background-color: var(--primary);
    color: #000;
    transform: translate(4px, 4px);
    box-shadow: none;
  }
  
  .pixel-nav a:active {
    transform: translate(0, 0);
  }
  
  /* 像素风格内容区 */
  .main-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
  }
  
  /* 像素风格网格布局 */
  .pixel-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
  }
  
  /* 像素风格卡片 */
  .pixel-card {
    background-color: var(--light-bg);
    border: var(--pixel-border);
    box-shadow: 8px 8px 0 rgba(0,0,0,0.5);
    transition: all 0.1s ease;
    position: relative;
  }
  
  .pixel-card:hover {
    transform: translate(4px, 4px);
    box-shadow: 4px 4px 0 rgba(0,0,0,0.5);
  }
  
  .card-image {
    height: 160px;
    overflow: hidden;
    border-bottom: var(--pixel-border);
  }
  
  .card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: contrast(120%) brightness(90%);
  }
  
  .card-content {
    padding: 1rem;
  }
  
  .card-title {
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
    color: var(--primary);
    text-shadow: 2px 2px 0 #000;
  }
  
  .card-desc {
    color: var(--text-color);
    margin-bottom: 1rem;
    font-size: 0.8rem;
    line-height: 1.6;
  }
  
  .card-footer {
    display: flex;
    justify-content: space-between;
    color: var(--secondary);
    font-size: 0.7rem;
    border-top: var(--pixel-border);
    padding-top: 0.8rem;
  }
  
  /* 像素风格分类标题 */
  .section-heading {
    position: relative;
    margin: 3rem 0 1.5rem;
    padding-bottom: 1rem;
    border-bottom: var(--pixel-border);
  }
  
  .section-title {
    font-size: 1.5rem;
    color: var(--tertiary);
    text-shadow: 4px 4px 0 #000;
    position: relative;
    display: inline-block;
  }
  
  .section-title:after {
    content: "";
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--primary);
  }
  
  /* 像素风格分页 */
  .pixel-pagination {
    display: flex;
    justify-content: center;
    margin: 3rem 0;
    gap: 1rem;
  }
  
  .pixel-pagination a {
    color: var(--text-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: var(--pixel-border);
    background-color: var(--light-bg);
    font-size: 0.8rem;
    transition: all 0.1s ease;
  }
  
  .pixel-pagination a:hover {
    background-color: var(--tertiary);
    color: #000;
    transform: translate(4px, 4px);
    box-shadow: none;
  }
  
  /* 像素风格文章详情 */
  .pixel-article {
    background-color: var(--light-bg);
    border: var(--pixel-border);
    box-shadow: 8px 8px 0 rgba(0,0,0,0.5);
    padding: 2rem;
    margin: 2rem 0;
  }
  
  .article-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: var(--pixel-border);
  }
  
  .article-title {
    font-size: 1.8rem;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--primary);
    text-shadow: 4px 4px 0 #000;
  }
  
  .article-subtitle {
    color: var(--secondary);
    font-size: 1rem;
    max-width: 800px;
    margin: 0 auto 1.5rem;
  }
  
  .article-meta {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    color: var(--tertiary);
    font-size: 0.8rem;
  }
  
  .article-image {
    margin: 1.5rem 0;
    border: var(--pixel-border);
  }
  
  .article-image img {
    width: 100%;
    height: auto;
    display: block;
    filter: contrast(120%) brightness(90%);
  }
  
  .article-body {
    line-height: 1.8;
    font-size: 0.9rem;
    color: var(--text-color);
  }
  
  .article-body img {
    max-width: 100%;
    height: auto;
    margin: 1.5rem auto;
    display: block;
    border: var(--pixel-border);
  }
  
  .article-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: var(--pixel-border);
  }
  
  .article-navigation a {
    color: var(--text-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: var(--pixel-border);
    background-color: var(--light-bg);
    font-size: 0.8rem;
    transition: all 0.1s ease;
  }
  
  .article-navigation a:hover {
    background-color: var(--secondary);
    color: #000;
    transform: translate(4px, 4px);
    box-shadow: none;
  }
  
  /* 像素风格友情链接 */
  .pixel-links {
    background-color: var(--light-bg);
    border: var(--pixel-border);
    box-shadow: 8px 8px 0 rgba(0,0,0,0.5);
    padding: 1.5rem;
    margin: 2rem 0;
  }
  
  .links-title {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--tertiary);
    text-shadow: 3px 3px 0 #000;
  }
  
  .links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
  }
  
  .link-item {
    background-color: var(--dark-bg);
    padding: 0.8rem;
    border: var(--pixel-border);
    transition: all 0.1s ease;
  }
  
  .link-item:hover {
    background-color: var(--primary);
    transform: translate(4px, 4px);
    box-shadow: none;
  }
  
  .link-item a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.8rem;
    display: block;
  }
  
  .link-item:hover a {
    color: #000;
  }
  
  /* 像素风格页脚 */
  .pixel-footer {
    background-color: var(--light-bg);
    border-top: var(--pixel-border);
    padding: 2rem 0;
    margin-top: 2rem;
    text-align: center;
  }
  
  .footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
  }
  
  .copyright {
    margin-top: 1rem;
    color: var(--text-color);
    font-size: 0.7rem;
  }
  
  /* 响应式设计 */
  @media (max-width: 768px) {
    .header-container {
      flex-direction: column;
      gap: 1rem;
    }
    
    .pixel-nav ul {
      flex-wrap: wrap;
      justify-content: center;
    }
    
    .main-container {
      padding: 0 1rem;
    }
    
    .pixel-grid {
      grid-template-columns: 1fr;
    }
    
    .pixel-article {
      padding: 1.5rem;
    }
    
    .article-title {
      font-size: 1.5rem;
    }
    
    .article-meta {
      flex-direction: column;
      gap: 0.5rem;
    }
    
    .links-grid {
      grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
  }