/* ===== 文章主体布局 ===== */
  .art-main{padding:36px 0 52px}
  .art-layout{display:grid;grid-template-columns:1fr 320px;gap:40px}

  /* ===== 文章卡片 ===== */
  .article{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;max-width:100%;min-width:0}
  .art-head{padding:36px 40px 28px;border-bottom:1px solid var(--line)}
  .art-head .cat-tag{display:inline-block;background:#FFF1F1;color:var(--brand);font-size:12px;font-weight:700;padding:4px 12px;border-radius:6px;margin-bottom:18px}
  .art-head h1{font-size:30px;line-height:1.35;letter-spacing:-.3px;margin-bottom:18px}
  .art-head .lead{font-size:16px;color:var(--slate);line-height:1.7;margin-bottom:22px}
  .art-head .meta{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px}
  .art-head .meta .info{display:flex;align-items:center;gap:16px;font-size:13px;color:var(--muted)}
  .art-head .meta .info .src{display:flex;align-items:center;gap:6px;color:var(--slate);font-weight:500}
  .art-head .meta .info .av{width:28px;height:28px;border-radius:50%;background:var(--brand-grad);display:grid;place-items:center;color:#fff;font-size:12px;font-weight:700}

  /* ===== 正文排版 ===== */
  .art-body{padding:32px 40px 12px;font-size:17px;line-height:1.85;color:#1E293B;word-wrap:break-word;overflow-wrap:break-word;overflow-x:hidden}
  .art-body *{max-width:100%;box-sizing:border-box}
  .art-body p{margin-bottom:22px}
  .art-body h2{font-size:21px;margin:36px 0 16px;padding-left:14px;border-left:4px solid var(--brand);color:var(--ink)}
  .art-body h2:first-child{margin-top:0}
  .art-body img{max-width:100%;height:auto;border-radius:var(--radius-sm);margin:20px 0}
  .art-body table{max-width:100%;display:block;overflow-x:auto}
  .art-body iframe,.art-body video{max-width:100%}
  .art-body pre{max-width:100%;overflow-x:auto;white-space:pre-wrap;word-break:break-all}

  /* 数据卡片（文章内嵌） */
  .data-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:28px 0}
  .data-card{background:var(--bg);border-radius:var(--radius-sm);padding:22px 20px;border:1px solid var(--line);transition:.2s}
  .data-card:hover{border-color:var(--brand);box-shadow:var(--shadow)}
  .data-card .num{font-size:30px;font-weight:800;background:var(--brand-grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;line-height:1.1}
  .data-card .unit{font-size:15px;color:var(--slate);font-weight:600;margin-left:2px}
  .data-card .label{font-size:13px;color:var(--muted);margin-top:8px;line-height:1.5}
  .data-card .rank{display:inline-block;font-size:11px;font-weight:700;color:var(--brand);background:#FFF1F1;padding:2px 8px;border-radius:5px;margin-top:10px}

  /* 引用块 */
  .pull-quote{margin:30px 0;padding:24px 28px;background:linear-gradient(135deg,rgba(215,0,15,.05),rgba(232,22,29,.05));border-left:4px solid var(--brand);border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:18px;color:var(--ink);font-weight:600;line-height:1.7;position:relative}
  .pull-quote::before{content:"\201C";position:absolute;left:14px;top:-6px;font-size:56px;color:var(--brand);opacity:.2;font-family:Georgia,serif;line-height:1}

  /* 分享栏 */
  .share-bar{display:flex;align-items:center;gap:8px}
  .share-bar span{font-size:13px;color:var(--muted);margin-right:2px}
  .share-bar a{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;background:var(--bg);color:var(--slate);transition:.2s}
  .share-bar a:hover{background:var(--brand);color:#fff;transform:translateY(-2px)}
  .share-bar svg{width:16px;height:16px}

  /* 标签 */
  .art-tags{padding:8px 40px 28px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;border-top:1px solid var(--line);margin-top:20px}
  .art-tags .lab{font-size:14px;color:var(--muted);font-weight:600}
  .art-tags a{font-size:13px;padding:6px 14px;border-radius:20px;background:var(--bg);color:var(--slate);font-weight:500;transition:.2s}
  .art-tags a:hover{background:var(--brand);color:#fff}

  /* 底部分享与作者 */
  .art-foot{padding:20px 40px 32px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;border-top:1px solid var(--line)}
  .art-foot .author{display:flex;align-items:center;gap:14px}
  .art-foot .author .av{width:48px;height:48px;border-radius:50%;background:var(--brand-grad);display:grid;place-items:center;color:#fff;font-size:18px;font-weight:700;flex-shrink:0}
  .art-foot .author .n{font-size:15px;font-weight:700}
  .art-foot .author .d{font-size:12px;color:var(--muted);margin-top:2px}

  /* 上下篇 */
  .prev-next{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding:0 40px 32px}
  .prev-next a{padding:18px 20px;border-radius:var(--radius-sm);background:var(--bg);border:1px solid var(--line);transition:.2s;display:flex;flex-direction:column;gap:6px;min-width:0;overflow:hidden}
  .prev-next a:hover{border-color:var(--brand);background:#fff;box-shadow:var(--shadow)}
  .prev-next a .dir{font-size:12px;color:var(--muted);font-weight:600;display:flex;align-items:center;gap:4px}
  .prev-next a .ttl{font-size:14px;font-weight:600;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}
  @media(max-width:600px){
    .prev-next a .ttl{white-space:normal;overflow:visible;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;word-wrap:break-word}
  }
  .prev-next a.next{text-align:right}
  .prev-next a.next .dir{justify-content:flex-end}
  .prev-next .disabled{padding:18px 20px;border-radius:var(--radius-sm);background:var(--bg);border:1px solid var(--line);opacity:.35}

  /* 相关推荐 */
  .related{padding:0 40px 36px}
  .related h3{font-size:18px;margin-bottom:18px;display:flex;align-items:center;gap:10px}
  .related h3 .bar{width:4px;height:20px;border-radius:2px;background:var(--brand-grad)}
  .rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
  .rel-card{cursor:pointer;border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--line);transition:.2s}
  .rel-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px)}
  .rel-card img{width:100%;height:130px;object-fit:cover}
  .rel-card .cap{padding:12px 14px}
  .rel-card .cap h4{font-size:14.5px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s}
  .rel-card:hover .cap h4{color:var(--brand)}
  .rel-card .cap .m{font-size:12px;color:var(--muted);margin-top:7px}

  @media(max-width:980px){
    .art-layout{grid-template-columns:1fr}
    .sidebar{position:static;flex-direction:row;flex-wrap:wrap;gap:16px}
    .side-card,.subscribe{flex:1 1 280px}
    .rel-grid{grid-template-columns:1fr 1fr}
  }
  @media(max-width:600px){
    .art-main{padding:20px 0 32px}
    .art-layout{gap:24px}
    .art-head{padding:20px 16px 18px}
    .art-head h1{font-size:22px}
    .art-head .lead{font-size:14px}
    .art-body{padding:20px 16px 8px;font-size:15px;line-height:1.8}
    .art-body h2{font-size:18px}
    .art-body p{margin-bottom:16px}
    .data-grid{grid-template-columns:1fr;gap:10px}
    .art-tags,.art-foot,.prev-next,.related{padding-left:16px;padding-right:16px}
    .prev-next{grid-template-columns:1fr}
    .prev-next a{padding:14px 16px}
    .rel-grid{grid-template-columns:1fr}
    .related h3{font-size:16px}
    .sidebar{flex-direction:column}
  }