/* ===== 基础重置与变量 ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    :root {
      --text-primary: #111827;
      --text-secondary: #4b5563;
      --text-muted: #9ca3af;
      --border: #e5e7eb;
      --bg: #ffffff;
      --bg-subtle: #f9fafb;
      --accent: #111827;
      --radius: 8px;
      --max-width: 1100px;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      font-size: 15px;
      line-height: 1.7;
      color: var(--text-primary);
      background: var(--bg);
      -webkit-font-smoothing: antialiased;
    }
    a { color: var(--text-primary); text-decoration: none; }
    a:hover { text-decoration: underline; }
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* ===== 面包屑 ===== */
    .breadcrumb {
      padding: 16px 0;
      font-size: 13px;
      color: var(--text-muted);
    }
    .breadcrumb a {
      color: var(--text-secondary);
    }
    .breadcrumb a:hover {
      color: var(--text-primary);
    }
    .breadcrumb span.sep {
      margin: 0 8px;
      color: var(--text-muted);
    }

    /* ===== 栏目头部 ===== */
    .category-header {
      padding: 40px 0 32px;
    }
    .category-header h1 {
      font-size: 26px;
      font-weight: 700;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .category-header h1 .icon {
      width: 36px;
      height: 36px;
      background: var(--text-primary);
      color: #fff;
      border-radius: var(--radius);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
    }
    .category-header .desc {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.8;
      max-width: 700px;
    }
    .category-header .meta {
      display: flex;
      gap: 20px;
      margin-top: 16px;
      font-size: 13px;
      color: var(--text-muted);
    }
    .category-header .meta span {
      display: flex;
      align-items: center;
      gap: 4px;
    }

    /* ===== 主体两栏布局 ===== */
    .main-wrap {
      display: grid;
      grid-template-columns: 1fr 300px;
      gap: 48px;
      padding-bottom: 64px;
    }

    /* ===== 文章列表 ===== */
    .section-title {
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 20px;
      padding-bottom: 10px;
      border-bottom: 2px solid var(--text-primary);
      display: inline-block;
    }
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 0;
    }
    .article-card {
      padding: 24px 0;
      border-bottom: 1px solid var(--border);
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 20px;
      align-items: start;
    }
    .article-card:last-child {
      border-bottom: none;
    }
    .article-card .article-main {
      min-width: 0;
    }
    .article-card .article-meta {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
    }
    .article-card .article-meta .tag {
      display: inline-block;
      padding: 2px 8px;
      font-size: 11px;
      color: var(--text-secondary);
      background: var(--bg-subtle);
      border: 1px solid var(--border);
      border-radius: 4px;
    }
    .article-card h2 {
      font-size: 17px;
      font-weight: 600;
      line-height: 1.4;
      margin-bottom: 8px;
    }
    .article-card h2 a:hover {
      text-decoration: none;
      color: var(--text-secondary);
    }
    .article-card .excerpt {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .article-card .read-more {
      font-size: 13px;
      font-weight: 500;
      margin-top: 10px;
      display: inline-block;
      color: var(--text-primary);
    }
    .article-card .read-more::after {
      content: " →";
    }

    /* ===== 侧边栏 ===== */
    .sidebar {
      position: sticky;
      top: 80px;
      height: fit-content;
    }
    .widget {
      background: var(--bg-subtle);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 20px;
      margin-bottom: 20px;
    }
    .widget h3 {
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 14px;
      padding-bottom: 10px;
      border-bottom: 1px solid var(--border);
    }
    .widget p, .widget li {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.8;
    }
    .widget ul {
      list-style: none;
    }
    .widget ul li {
      padding: 8px 0;
      border-bottom: 1px solid #f3f4f6;
    }
    .widget ul li:last-child {
      border-bottom: none;
    }
    .widget ul li a {
      color: var(--text-secondary);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .widget ul li a:hover {
      color: var(--text-primary);
    }

    /* 热门文章 */
    .hot-list li a {
      display: block;
      line-height: 1.6;
    }
    .hot-list li .hot-meta {
      font-size: 11px;
      color: var(--text-muted);
      margin-top: 2px;
    }

    /* 标签云 */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .tag-cloud a {
      display: inline-block;
      padding: 4px 10px;
      font-size: 12px;
      color: var(--text-secondary);
      background: #fff;
      border: 1px solid var(--border);
      border-radius: 4px;
      transition: all 0.2s;
    }
    .tag-cloud a:hover {
      background: var(--text-primary);
      color: #fff;
      border-color: var(--text-primary);
      text-decoration: none;
    }

    /* ===== 分页 ===== */
    .pagination {
      display: flex;
      justify-content: center;
      gap: 6px;
      margin-top: 32px;
      padding-top: 24px;
      border-top: 1px solid var(--border);
    }
    .pagination a, .pagination span {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-width: 36px;
      height: 36px;
      padding: 0 10px;
      font-size: 13px;
      border-radius: var(--radius);
      border: 1px solid var(--border);
      color: var(--text-secondary);
    }
    .pagination a:hover {
      background: var(--text-primary);
      color: #fff;
      border-color: var(--text-primary);
      text-decoration: none;
    }
    .pagination span.current {
      background: var(--text-primary);
      color: #fff;
      border-color: var(--text-primary);
      font-weight: 500;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 900px) {
      .main-wrap {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .sidebar {
        position: static;
      }
      .article-card {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 600px) {
      .category-header h1 { font-size: 20px; }
      .category-header .meta { flex-wrap: wrap; gap: 10px; }
    }