:root { --primary: #0066FF; --primary-hover: #0052CC; --primary-light: #E6F0FF; --text-main: #1A1A1A; --text-sub: #5C6C80; --text-light: #8C9AAE; --bg-white: #FFFFFF; --bg-gray: #F5F8FF; --bg-footer: #111827; --border: #E2E8F0; --radius-sm: 8px; --radius-md: 12px; --radius-lg: 20px; --container: 1160px; --shadow-sm: 0 2px 8px rgba(0,0,0,0.04); --shadow-md: 0 8px 24px rgba(0,102,255,0.08); --shadow-lg: 0 12px 32px rgba(0,0,0,0.08); }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif; color: var(--text-main); background: var(--bg-white); line-height: 1.6; -webkit-font-smoothing: antialiased; }
    a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
    a:hover { color: var(--primary-hover); }
    ul { list-style: none; }
    img, svg { max-width: 100%; display: block; height: auto; }
    .container { width: min(100% - 40px, var(--container)); margin-inline: auto; }

    /* 按钮与组件 */
    .btn { display: inline-flex; align-items: center; justify-content: center; padding: 0 24px; height: 44px; border-radius: var(--radius-sm); font-size: 15px; font-weight: 600; cursor: pointer; transition: all 0.2s; border: 1px solid transparent; white-space: nowrap; }
    .btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 12px rgba(0,102,255,0.2); }
    .btn-primary:hover { background: var(--primary-hover); color: #fff; transform: translateY(-1px); }
    
    /* 导航 */
    .header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.92); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
    .header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
    .logo img { height: 40px; width: auto; }
    .nav-links { display: flex; gap: 32px; }
    .nav-links a { color: var(--text-main); font-size: 15px; font-weight: 500; }
    .nav-links a:hover, .nav-links a.active { color: var(--primary); }

    /* Hero */
    .hero { padding: 80px 0 60px; background: var(--bg-gray); text-align: center; border-bottom: 1px solid var(--border); }
    .hero h1 { font-size: clamp(32px, 4vw, 52px); font-weight: 800; color: #0B1A30; margin-bottom: 20px; letter-spacing: -1px; }
    .hero p { font-size: 18px; color: var(--text-sub); max-width: 720px; margin: 0 auto; }

    /* 分类导航 */
    .category-nav { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; margin-top: 32px; }
    .category-nav a { padding: 8px 20px; background: #fff; border: 1px solid var(--border); border-radius: 999px; color: var(--text-sub); font-size: 14px; font-weight: 500; transition: all 0.2s; }
    .category-nav a:hover, .category-nav a.active { background: var(--primary); color: #fff; border-color: var(--primary); }

    /* 主体内容区 */
    .section { padding: 64px 0 96px; }
    .blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; width: 100%; }
    
    /* 文章卡片 */
    .blog-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; display: flex; flex-direction: column; transition: transform 0.3s, box-shadow 0.3s; }
    .blog-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
    .blog-cover { height: 200px; overflow: hidden; background: var(--bg-gray); display: block; }
    .blog-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s; }
    .blog-card:hover .blog-cover img { transform: scale(1.05); }
    
    .blog-content { padding: 28px; flex: 1; display: flex; flex-direction: column; }
    .blog-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; font-size: 13px; color: var(--text-light); }
    .blog-tag { color: var(--primary); background: var(--primary-light); padding: 4px 10px; border-radius: 4px; font-weight: 600; }
    
    /* 修复标题溢出：限制两行，处理长单词断开 */
    .blog-card h2 { 
      font-size: 20px; 
      margin-bottom: 12px; 
      line-height: 1.4; 
      font-weight: 700;
      word-break: break-word;
      overflow-wrap: break-word;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    
    .blog-card h2 a { color: var(--text-main); }
    .blog-card:hover h2 a { color: var(--primary); }
    .blog-card p { font-size: 14.5px; color: var(--text-sub); line-height: 1.7; flex: 1; margin-bottom: 24px; }
    
    .read-more { display: inline-flex; align-items: center; font-size: 14.5px; font-weight: 600; }
    .read-more::after { content: '→'; margin-left: 6px; transition: transform 0.2s; }
    .blog-card:hover .read-more::after { transform: translateX(4px); }

    /* 分页 */
    .pagination { display: flex; justify-content: center; align-items: center; gap: 8px; margin-top: 64px; }
    .pagination a, .pagination span { display: inline-flex; align-items: center; justify-content: center; min-width: 40px; height: 40px; padding: 0 12px; border-radius: var(--radius-sm); border: 1px solid var(--border); font-size: 14px; font-weight: 500; color: var(--text-main); transition: all 0.2s; }
    .pagination a:hover { border-color: var(--primary); color: var(--primary); }
    .pagination .active { background: var(--primary); border-color: var(--primary); color: #fff; }
    .pagination .disabled { color: var(--text-light); border-color: var(--border); cursor: not-allowed; background: var(--bg-gray); }

    /* Footer */
    .footer { background: var(--bg-footer); color: #94A3B8; padding: 80px 0 32px; }
    .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 64px; }
    .footer-brand img { height: 40px; margin-bottom: 20px; }
    .footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 24px; }
    .footer-col a { color: #94A3B8; font-size: 14px; display: block; margin-bottom: 12px; }
    .footer-col a:hover { color: #fff; }
    .footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 32px; display: flex; justify-content: space-between; font-size: 13px; }

    @media (max-width: 1024px) {
      .blog-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .blog-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; text-align: center; gap: 32px; }
      .footer-brand p { margin: 0 auto; }
      .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
    }