/* 长文专栏 · 与主站设计体系共用变量，只补文章页专用组件 */
.lf-meta{display:flex;gap:14px;flex-wrap:wrap;font-size:12.5px;color:var(--muted);
  margin-top:12px;font-variant-numeric:tabular-nums}
.lf-meta span{display:inline-flex;align-items:center;gap:5px}
.lf-wrap{display:grid;grid-template-columns:minmax(0,1fr) 292px;gap:44px;align-items:start}
.lf-main{min-width:0}
.lf-aside{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px}
@media (max-width:1000px){.lf-wrap{grid-template-columns:1fr}.lf-aside{position:static;order:2}}

/* 一句话结论 */
.lf-answer{position:relative;background:var(--surface);border:1px solid var(--line);
  border-left:4px solid var(--accent);border-radius:var(--r-md,12px);padding:20px 24px 18px;
  box-shadow:var(--shadow-sm);margin-bottom:26px}
.lf-answer__label{font-size:11.5px;font-weight:800;letter-spacing:.18em;color:var(--accent);margin-bottom:8px}
.lf-answer p{margin:0;font-size:16.5px;line-height:1.85;color:var(--ink)}

/* 事实卡 */
.lf-facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-md,12px);overflow:hidden;margin:0 0 30px}
.lf-facts div{background:var(--surface);padding:14px 16px}
.lf-facts b{display:block;font-size:11px;letter-spacing:.08em;color:var(--muted);font-weight:700;margin-bottom:6px}
.lf-facts span{display:block;font-size:14.5px;font-weight:700;color:var(--ink);line-height:1.5}
@media (max-width:760px){.lf-facts{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* 正文 */
.lf-prose{font-size:16.5px;line-height:1.9;color:var(--ink-2)}
.lf-prose h2{position:relative;margin:38px 0 14px;padding-left:16px;font-size:clamp(20px,2.2vw,25px);
  line-height:1.35;color:var(--ink)}
.lf-prose h2::before{content:"";position:absolute;left:0;top:.28em;width:4px;height:1.05em;
  border-radius:2px;background:var(--brand)}
.lf-prose p{margin:0 0 16px}
.lf-prose strong{color:var(--ink);font-weight:700}
.lf-list{margin:6px 0 20px;padding:0;list-style:none;border-left:2px solid var(--brand-100);padding-left:18px}
.lf-list li{position:relative;margin:9px 0;padding-left:16px;font-size:15.5px;line-height:1.8;color:var(--ink-2)}
.lf-list li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;
  background:var(--brand)}
.lf-table{margin:22px 0 26px;border:1px solid var(--line);border-radius:var(--r-md,12px);overflow:auto;background:var(--surface)}
.lf-table table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:520px}
.lf-table th{background:var(--bg-2);text-align:left;font-size:12px;letter-spacing:.04em;color:var(--muted);
  padding:10px 14px;border-bottom:1px solid var(--line);font-weight:700;white-space:nowrap}
.lf-table td{padding:11px 14px;border-bottom:1px solid var(--line-2);vertical-align:top;line-height:1.65}
.lf-table tr:last-child td{border-bottom:0}
.lf-table caption{caption-side:top;text-align:left;font-size:12.5px;color:var(--muted);padding:10px 14px 0}

/* 实用清单 */
.lf-tips{background:var(--brand-050);border:1px solid var(--brand-100);border-radius:var(--r-md,12px);
  padding:20px 24px;margin:30px 0}
.lf-tips h3{margin:0 0 10px;font-size:15px;color:var(--brand-700);letter-spacing:.04em}
.lf-tips ul{margin:0;padding-left:18px;color:var(--ink-2);font-size:15px;line-height:1.85}
.lf-tips li{margin:6px 0}

/* 图集 */
.lf-gallery{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:30px 0}
.lf-gallery figure{margin:0;border-radius:var(--r-md,12px);overflow:hidden;background:var(--bg-2)}
.lf-gallery img{display:block;width:100%;height:100%;aspect-ratio:4/3;object-fit:cover}
.lf-gallery figcaption{font-size:12.5px;color:var(--muted);padding:9px 12px;line-height:1.6}
@media (max-width:640px){.lf-gallery{grid-template-columns:1fr}}

/* 侧栏 */
.lf-toc{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md,12px);
  padding:18px 20px;box-shadow:var(--shadow-sm)}
.lf-toc h3{margin:0 0 10px;font-size:11.5px;letter-spacing:.2em;color:var(--muted);font-weight:800}
.lf-toc ol{margin:0;padding:0;list-style:none;counter-reset:toc}
.lf-toc li{counter-increment:toc;margin:9px 0;font-size:13.5px;line-height:1.55}
.lf-toc li a{display:flex;gap:9px;color:var(--ink-2)}
.lf-toc li a:hover{color:var(--brand)}
.lf-toc li span{color:var(--accent);font-weight:800;font-variant-numeric:tabular-nums}
.lf-side-cta{background:var(--ink);color:#fff;border-radius:var(--r-md,12px);padding:20px 20px 22px}
.lf-side-cta h3{margin:0 0 8px;font-size:16px;color:#fff;line-height:1.45}
.lf-side-cta p{margin:0 0 14px;font-size:13px;color:rgba(255,255,255,.78);line-height:1.7}
.lf-side-cta .btn{width:100%;justify-content:center}

/* 相关阅读 */
.lf-related{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:22px}
.lf-related a{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md,12px);
  padding:18px 20px;transition:.18s;color:var(--ink)}
.lf-related a:hover{border-color:var(--brand-100);box-shadow:var(--shadow);transform:translateY(-2px);color:var(--ink)}
.lf-related small{display:block;font-size:11.5px;color:var(--accent);font-weight:800;letter-spacing:.1em;margin-bottom:8px}
.lf-related b{display:block;font-size:16px;line-height:1.5}
.lf-related span{display:block;margin-top:8px;font-size:13px;color:var(--muted);line-height:1.65}
@media (max-width:820px){.lf-related{grid-template-columns:1fr}}

/* 栏目 Hub */
.hub-hero{position:relative;padding:64px 0 44px;overflow:hidden;color:#fff;isolation:isolate;
  min-height:clamp(320px,46vh,460px);display:flex;flex-direction:column;justify-content:flex-end}
.hub-hero__media{position:absolute;inset:0;z-index:-2}
.hub-hero__media img{width:100%;height:100%;object-fit:cover}
.hub-hero__veil{position:absolute;inset:0;z-index:-1;background:
  linear-gradient(90deg,rgba(5,18,14,.52),rgba(5,18,14,.20) 58%,rgba(5,18,14,.26)),
  linear-gradient(180deg,rgba(7,24,20,.24) 0%,rgba(7,24,20,.34) 55%,rgba(7,24,20,.62) 100%)}
.hub-hero h1{margin:10px 0 12px;font-size:clamp(26px,4vw,42px);line-height:1.2;color:#fff;text-shadow:0 2px 18px rgba(0,0,0,.40)}
.hub-hero p{max-width:62ch;color:rgba(255,255,255,.92);font-size:clamp(15px,1.5vw,17px);line-height:1.8;text-shadow:0 1px 10px rgba(0,0,0,.30)}
.hub-hero .eyebrow{color:#F2D9A6}
.hub-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:26px}
.hub-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md,12px);padding:20px 22px;transition:.18s;color:var(--ink);min-height:100%}
.hub-card:hover{border-color:var(--brand-100);box-shadow:var(--shadow);transform:translateY(-2px);color:var(--ink)}
.hub-card small{font-size:11.5px;color:var(--brand);font-weight:800;letter-spacing:.12em}
.hub-card b{margin:9px 0 8px;font-size:17px;line-height:1.5}
.hub-card span{font-size:13.5px;color:var(--muted);line-height:1.7}
@media (max-width:980px){.hub-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:620px){.hub-grid{grid-template-columns:1fr}}