/* ============================================================
   文章发布系统 · 前台样式（2026 改版）
   三个核心页面：
   - 首页：门户 Hero + 分类卡片网格 + 文章瀑布网格
   - 列表页（分类/标签/搜索/作者）：轻量页头 + 分类胶囊条 + 文章网格
   - 内容页：文章头卡片 + 正文 + 侧栏
   ============================================================ */
:root{
  --brand:#4f46e5;
  --brand-dark:#4338ca;
  --brand-deep:#3730a3;
  --brand-soft:#eef2ff;
  --ink:#0f172a;
  --text:#334155;
  --muted:#64748b;
  --line:#e7eaf1;
  --bg:#f5f6fa;
  --card:#ffffff;
  --radius:16px;
  --radius-sm:10px;
  --shadow-sm:0 1px 2px rgba(15,23,42,.05);
  --shadow:0 6px 18px -8px rgba(15,23,42,.14);
  --shadow-lg:0 20px 44px -20px rgba(15,23,42,.28);
  --max:1120px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:15px;line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto}
a{color:inherit}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}

/* ---------- 无障碍：跳到主要内容 ---------- */
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:100;
  background:var(--brand);color:#fff;padding:10px 18px;border-radius:0 0 10px 0;
  text-decoration:none;font-size:14px;
}
.skip-link:focus{left:0}

/* ---------- 面包屑 ---------- */
.crumbs{margin:20px 0 -6px;font-size:13px;color:var(--muted);flex:0 0 100%;width:100%}
.crumbs ol{list-style:none;display:flex;gap:7px;flex-wrap:wrap;padding:0;margin:0;align-items:center}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:#cbd5e1}

/* ---------- 顶部导航 ---------- */
.site-nav{background:#fff;backdrop-filter:blur(8px);position:sticky;top:0;z-index:50;border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:22px;height:62px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}
.brand-mark{
  width:32px;height:32px;border-radius:9px;flex-shrink:0;
  background:linear-gradient(135deg,#6366f1,#4f46e5);
  color:#fff;font-size:15px;font-weight:800;display:grid;place-items:center;
  box-shadow:0 4px 12px rgba(79,70,229,.35);
}
.brand-logo{height:34px;max-width:150px;object-fit:contain;flex-shrink:0;border-radius:4px}
.brand-text{color:var(--ink);font-size:16px;font-weight:700;letter-spacing:.3px;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;overflow-x:auto;scrollbar-width:none}
.nav-links::-webkit-scrollbar{display:none}
.nav-links a{
  color:var(--text);text-decoration:none;font-size:14px;padding:7px 13px;border-radius:8px;
  white-space:nowrap;transition:.16s;
}
.nav-links a:hover{color:var(--brand);background:var(--brand-soft)}
.nav-links a.on{color:#fff;background:var(--brand)}
.nav-links a.nav-dash{color:var(--muted);border:1px solid var(--line)}
.nav-links a.nav-dash:hover{color:var(--brand);border-color:#c7d2fe;background:transparent}
.nav-toggle{display:none;margin-left:auto;background:none;border:none;color:var(--text);cursor:pointer;padding:6px}

/* ---------- 首页 Hero ---------- */
.hero{
  position:relative;overflow:hidden;color:var(--ink);
  background:radial-gradient(900px 420px at 85% -10%,rgba(99,102,241,.16),transparent 60%),
             radial-gradient(700px 380px at 8% 110%,rgba(14,165,233,.12),transparent 55%),
             linear-gradient(150deg,#eef2ff 0%,#f8faff 52%,#e0e7ff 100%);
  padding:60px 0 62px;
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(79,70,229,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(79,70,229,.05) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(680px 320px at 50% 0%,#000,transparent);
}
.hero-inner{position:relative;max-width:720px;margin:0 auto;text-align:center;padding:0 20px}
.hero-eyebrow{
  display:inline-block;font-size:12.5px;letter-spacing:2px;font-weight:700;
  color:var(--brand);background:#fff;border:1px solid #c7d2fe;
  padding:5px 16px;border-radius:999px;margin-bottom:18px;
}
.hero h1{font-size:36px;font-weight:800;margin:0 0 14px;letter-spacing:-.6px;line-height:1.25;color:var(--ink)}
.hero p{margin:0 0 28px;font-size:15.5px;color:var(--muted)}
.search{
  display:flex;align-items:center;background:#fff;border-radius:999px;
  padding:6px 6px 6px 22px;box-shadow:0 14px 34px -18px rgba(79,70,229,.35);
  border:1px solid #e0e7ff;
  max-width:560px;margin:0 auto;
}
.search svg{color:#94a3b8;flex-shrink:0}
.search input{flex:1;border:0;outline:0;font-size:15px;padding:12px 14px;min-width:0;background:transparent;color:var(--ink);font-family:inherit}
.search button{
  border:0;background:var(--brand);color:#fff;border-radius:999px;
  padding:12px 28px;font-size:14.5px;font-weight:700;cursor:pointer;flex-shrink:0;font-family:inherit;
  transition:.18s;
}
.search button:hover{background:var(--brand-dark)}
.hero-stats{display:flex;justify-content:center;align-items:center;gap:18px;margin-top:26px;font-size:13.5px;color:var(--muted)}
.hero-stats b{color:var(--brand);font-size:17px;font-weight:800;margin-right:4px}
.hero-stats .dot{width:4px;height:4px;border-radius:50%;background:#cbd5e1}

/* ---------- 分类页页头（轻量，非首页） ---------- */
.page-head{
  background:linear-gradient(135deg,var(--brand-soft),#f8faff);
  border-bottom:1px solid var(--line);padding:30px 0;
}
.page-head h1{font-size:24px;font-weight:800;margin:0 0 6px;color:var(--ink);letter-spacing:-.3px}
.page-head p{margin:0;font-size:14px;color:var(--muted)}
.page-head p b{color:var(--brand);font-weight:700}

/* ---------- 分类卡片网格（首页） ---------- */
.cat-grid{
  max-width:var(--max);margin:28px auto 0;padding:0 20px;
  display:grid;grid-template-columns:repeat(6,1fr);gap:12px;
}
.cat-cell{
  display:flex;flex-direction:column;align-items:center;gap:8px;text-decoration:none;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 8px 15px;transition:.2s;position:relative;
}
.cat-cell:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#d8def8}
.cat-ico{
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;
  font-size:18px;font-weight:800;color:var(--brand);
  background:linear-gradient(135deg,var(--brand-soft),#e0e7ff);
}
.cat-cell-all .cat-ico{background:linear-gradient(135deg,#4f46e5,#6366f1);color:#fff}
.cat-name{font-size:13px;font-weight:600;color:var(--text);text-align:center;line-height:1.35}
.cat-cell em{
  font-style:normal;font-size:11px;color:var(--muted);background:var(--bg);
  border-radius:999px;padding:1px 9px;
}
.cat-cell-all em{color:var(--brand);background:var(--brand-soft)}

/* ---------- 分类胶囊条（列表页） ---------- */
.cat-bar{display:flex;gap:9px;overflow-x:auto;padding:18px 20px 6px;max-width:var(--max);margin:0 auto;scrollbar-width:none}
.cat-bar::-webkit-scrollbar{display:none}
.cat-bar a{
  flex-shrink:0;padding:7px 16px;border-radius:20px;font-size:13.5px;text-decoration:none;
  background:#fff;border:1px solid var(--line);color:var(--text);transition:.16s;
}
.cat-bar a:hover{border-color:#c7d2fe;color:var(--brand)}
.cat-bar a.on{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600;box-shadow:0 6px 16px -6px rgba(79,70,229,.6)}

/* ---------- 标签条 ---------- */
.tag-bar{padding-top:8px}
.tag-bar-lbl{flex-shrink:0;padding:7px 0;font-size:13px;color:var(--muted);font-weight:600}
.tag-bar a{display:inline-flex;align-items:center;gap:6px}
.tag-bar a em{font-style:normal;font-size:11px;background:#eef2ff;color:var(--brand);border-radius:9px;padding:1px 7px;line-height:1.4}
.tag-bar a.on em{background:rgba(255,255,255,.25);color:#fff}
.article-meta a.tag-alt{background:#f0fdf4;color:#15803d;text-decoration:none}

/* ---------- 列表头 ---------- */
.list-head{display:flex;align-items:baseline;justify-content:space-between;margin:28px 0 16px}
.list-head h2{font-size:19px;margin:0;color:var(--ink);font-weight:800;letter-spacing:-.2px}
.list-head h2::before{
  content:"";display:inline-block;width:4px;height:18px;border-radius:2px;
  background:var(--brand);margin-right:10px;vertical-align:-2px;
}
.list-head h1.list-h1{font-size:20px;margin:0;color:var(--ink);font-weight:800}
.list-head .count{font-size:13px;color:var(--muted)}

/* ---------- 文章卡片网格 ---------- */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.card{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow-sm);
  transition:.22s;overflow:hidden;display:flex;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d8def8}
.card-link{display:flex;flex-direction:column;text-decoration:none;color:inherit;flex:1;width:100%}
.card .thumb{
  width:100%;aspect-ratio:16/10;object-fit:cover;display:block;background:#eef1f6;
}
.card .thumb-ph{
  width:100%;aspect-ratio:16/10;background:linear-gradient(135deg,#eef1f6,#e6ebf5);
  display:grid;place-items:center;color:#c3ccdb;
}
.card-body{flex:1;min-width:0;display:flex;flex-direction:column;padding:15px 17px 17px}
.card-meta{font-size:12.5px;color:var(--muted);display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:9px}
.tag{background:var(--brand-soft);color:var(--brand);padding:2px 9px;border-radius:5px;font-weight:600;font-size:12px}
.tag-top{background:#fef3c7;color:#92400e;padding:2px 8px;border-radius:5px;font-weight:600;font-size:12px}
.tag-dl{background:#dcfce7;color:#166534;padding:2px 8px;border-radius:5px;font-weight:600;font-size:12px}
.card-title{
  font-size:16px;font-weight:700;color:var(--ink);margin:0 0 8px;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-desc{
  margin:0 0 auto;font-size:13.5px;color:var(--muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-foot{margin-top:12px;font-size:12px;color:#94a3b8;display:flex;justify-content:space-between;align-items:center}
.card:hover .card-title{color:var(--brand)}

/* ---------- 分页 ---------- */
.pager{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin:38px 0 12px}
.pager a,.pager span{
  min-width:38px;text-align:center;padding:8px 12px;border:1px solid var(--line);
  border-radius:10px;text-decoration:none;background:#fff;font-size:14px;color:var(--text);
}
.pager a:hover{border-color:var(--brand);color:var(--brand)}
.pager .on{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.pager .gap{border:0;background:transparent;color:var(--muted)}

.empty{text-align:center;padding:70px 20px;color:var(--muted)}
.empty .big{font-size:34px;margin-bottom:12px;opacity:.35}

/* ---------- 文章详情 ---------- */
.article-wrap{display:flex;flex-wrap:wrap;gap:24px;align-items:flex-start;padding-top:24px}
.article-main{flex:1;min-width:0}
.article-head{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:28px 30px}
.article-head h1{font-size:27px;line-height:1.45;margin:14px 0 0;color:var(--ink);font-weight:800;letter-spacing:-.4px}
.article-meta{font-size:13px;color:var(--muted);display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:#cbd5e1}
.dl-box{
  margin-top:20px;padding:16px 18px;background:#f8fafc;border:1px solid var(--line);
  border-radius:12px;display:flex;align-items:center;gap:14px;flex-wrap:wrap;
}
.dl-btns{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.dl-code{font-size:13px;color:var(--muted);display:inline-flex;align-items:center;gap:6px}
.dl-btn{
  display:inline-flex;align-items:center;gap:8px;padding:11px 22px;background:var(--brand);
  color:#fff;border-radius:10px;text-decoration:none;font-weight:700;font-size:14.5px;
  box-shadow:0 8px 18px -8px rgba(79,70,229,.7);transition:.18s;
}
.dl-btn:hover{background:var(--brand-dark)}
.dl-btn.dl-paid{background:#f59e0b;box-shadow:0 8px 18px -8px rgba(245,158,11,.7)}
.dl-btn.dl-paid:hover{background:#d97706}
.dl-paid-tag{font-style:normal;font-size:11px;background:rgba(255,255,255,.3);border-radius:5px;padding:1px 7px;font-weight:600}
.dl-info{font-size:13px;color:var(--muted);display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.code-chip{background:#fff;border:1px dashed #cbd5e1;border-radius:6px;padding:2px 10px;color:var(--brand);font-weight:700;letter-spacing:1px;font-family:ui-monospace,Menlo,Consolas,monospace}
.mini-btn{background:var(--brand-soft);color:var(--brand);border:0;border-radius:6px;padding:5px 11px;font-size:12.5px;cursor:pointer;font-family:inherit}
.mini-btn:hover{background:#e0e7ff}

.article-body{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);padding:32px 32px;margin-top:16px;
  font-size:16px;line-height:1.9;color:#3f4a5c;word-wrap:break-word;
}
.article-body h2{font-size:21px;margin:32px 0 14px;color:var(--ink);font-weight:700;padding-bottom:8px;border-bottom:1px solid var(--line)}
.article-body h3{font-size:18px;margin:26px 0 12px;color:var(--ink);font-weight:700}
.article-body h4{font-size:16px;margin:20px 0 10px;color:var(--ink)}
.article-body p{margin:0 0 18px}
.article-body img{border-radius:12px;margin:12px 0;box-shadow:var(--shadow-sm)}
.article-body ul,.article-body ol{padding-left:26px;margin:0 0 18px}
.article-body li{margin-bottom:7px}
.article-body blockquote{
  margin:20px 0;padding:14px 20px;background:#f8fafc;border-left:3px solid var(--brand);
  color:var(--muted);border-radius:0 10px 10px 0;
}
.article-body a{color:var(--brand)}
.article-body table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 13px;text-align:left}
.article-body th{background:#f8fafc;font-weight:600}
.article-body pre{background:#0f172a;color:#e2e8f0;padding:18px;border-radius:12px;overflow:auto;font-size:13.5px;max-width:100%;white-space:pre;overflow-wrap:normal}
.article-body pre code{background:transparent;padding:0;color:inherit}
.article-body code{background:#f1f5f9;padding:2px 7px;border-radius:5px;font-size:13.5px;color:#4338ca}

/* 付费隐藏内容 */
.pay-block{margin-top:16px}
.pay-tip{
  display:flex;align-items:center;gap:9px;background:#fffbeb;border:1px solid #fde68a;
  color:#92400e;border-radius:11px;padding:13px 17px;font-size:13.5px;margin-bottom:12px;
}
.pay-mask{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);padding:46px 22px;text-align:center;
}
.pay-mask .lock{
  width:54px;height:54px;margin:0 auto 14px;border-radius:50%;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand);
}
.pay-mask h3{margin:0 0 6px;font-size:17px;color:var(--ink)}
.pay-mask .price{font-size:14px;color:var(--muted);margin-bottom:20px}
.pay-mask .price b{color:#e11d48;font-size:19px;font-weight:800}
.pay-mask .pay-extra{font-size:13px;color:#64748b;margin:-12px 0 18px}
.pay-btn{
  display:inline-flex;align-items:center;gap:9px;padding:13px 34px;border:0;border-radius:11px;
  background:linear-gradient(135deg,#4f46e5,#4338ca);color:#fff;font-size:15.5px;font-weight:700;
  cursor:pointer;font-family:inherit;box-shadow:0 12px 26px -12px rgba(79,70,229,.9);
}
.pay-btn:hover{filter:brightness(1.06)}
.pay-btn:disabled{opacity:.65;cursor:default;filter:none}
.qr-wrap{margin-top:6px}
.qr-wrap img,.qr-wrap canvas{width:180px;height:180px;border-radius:12px;border:1px solid var(--line);background:#fff;padding:8px}
.qr-tip{font-size:13px;color:var(--muted);margin-top:10px}
.qr-tip.ok{color:#15803d;font-weight:600}

/* 正文内嵌付费块：未解锁占位 / 已解锁内容 */
.hide-slot{
  display:flex;align-items:center;justify-content:center;gap:10px;
  background:#fffbeb;border:1px dashed #f59e0b;border-radius:11px;
  padding:18px 16px;margin:16px 0;color:#92400e;font-size:13.5px;text-align:center;
}
.hide-slot-tag{
  flex-shrink:0;background:#f59e0b;color:#fff;font-size:11px;font-weight:700;
  padding:3px 8px;border-radius:999px;letter-spacing:.5px;
}
.hide-revealed{
  background:#fffbeb;border:1px solid #fde68a;border-left:4px solid #f59e0b;
  border-radius:11px;padding:16px 18px;margin:16px 0;
}
.hide-revealed > :first-child{margin-top:0}
.hide-revealed > :last-child{margin-bottom:0}

/* 上下篇 */
.pager-links{display:flex;gap:14px;margin-top:18px}
.pager-links a{
  flex:1;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 20px;text-decoration:none;transition:.18s;min-width:0;
}
.pager-links a:hover{border-color:#c7d2fe;box-shadow:var(--shadow)}
.pager-links .lbl{font-size:12px;color:var(--muted);margin-bottom:5px}
.pager-links .ttl{font-size:14px;font-weight:600;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pager-links a:hover .ttl{color:var(--brand)}
.pager-links .next{text-align:right}

/* ---------- 相关阅读 ---------- */
.related{margin-top:22px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:22px 24px}
.related-h{font-size:15px;margin:0 0 12px;color:var(--ink);font-weight:700;display:flex;align-items:center;gap:8px}
.related-h::before{content:"";width:4px;height:15px;border-radius:2px;background:var(--brand)}
.related-list{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.related-list li{display:flex;gap:12px;align-items:baseline;justify-content:space-between;border-bottom:1px dashed var(--line);padding-bottom:10px}
.related-list li:last-child{border-bottom:0;padding-bottom:0}
.related-list a{text-decoration:none;font-size:14px;color:var(--text);line-height:1.6;flex:1;min-width:0}
.related-list a:hover{color:var(--brand)}
.related-list time{font-size:12px;color:#94a3b8;flex-shrink:0}

/* ---------- 文章留言 ---------- */
.comments{margin-top:22px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:24px 26px}
.comments-h{font-size:16px;margin:0 0 16px;color:var(--ink);font-weight:700;display:flex;align-items:center;gap:8px}
.comments-h::before{content:"";width:4px;height:16px;border-radius:2px;background:var(--brand)}
.comments-h .count{font-size:13px;font-weight:600;background:var(--brand-soft);color:var(--brand);border-radius:999px;padding:1px 9px}
.comments-list{list-style:none;margin:0 0 20px;padding:0}
.comment{padding:16px 0;border-bottom:1px dashed var(--line)}
.comment:first-child{padding-top:0}
.comment:last-child{border-bottom:0;padding-bottom:0}
.comment-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.comment-avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,#6366f1,#4f46e5);color:#fff;display:grid;place-items:center;font-size:14px;font-weight:700;flex-shrink:0}
.comment-name{font-size:14px;font-weight:600;color:var(--ink)}
.comment-time{font-size:12px;color:#94a3b8;margin-left:auto}
.comment-content{margin:0;font-size:14px;color:var(--text);line-height:1.7;white-space:pre-wrap;word-break:break-word}
.comments-empty{margin:0 0 20px;font-size:14px;color:var(--muted)}
.comment-form h3{font-size:14px;margin:0 0 12px;color:var(--ink);font-weight:700}
.comment-fields{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:12px}
.comment-form input,.comment-form textarea{
  width:100%;border:1px solid var(--line);border-radius:10px;padding:11px 14px;
  font-size:14px;font-family:inherit;color:var(--ink);background:#fff;transition:.16s;box-sizing:border-box;
}
.comment-form input:focus,.comment-form textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(79,70,229,.12)}
.comment-form textarea{resize:vertical;min-height:96px}
.comment-actions{display:flex;align-items:center;gap:14px;margin-top:4px}
.comment-submit{background:var(--brand);color:#fff;border:0;border-radius:10px;padding:11px 28px;font-size:14.5px;font-weight:700;cursor:pointer;font-family:inherit;transition:.18s}
.comment-submit:hover{background:var(--brand-dark)}
.comment-submit:disabled{opacity:.6;cursor:default}
.comment-tip{font-size:13px;color:var(--muted)}
.comment-tip.ok{color:#15803d}
.comment-tip.err{color:#dc2626}

/* 侧栏 */
.article-side{width:268px;flex-shrink:0;position:sticky;top:86px}
.side-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:19px;margin-bottom:16px}
.side-box h4{margin:0 0 13px;font-size:14px;color:var(--ink);font-weight:700;display:flex;align-items:center;gap:8px}
.side-box h4::before{content:"";width:4px;height:14px;border-radius:2px;background:var(--brand)}
.side-list{list-style:none;margin:0;padding:0}
.side-list li{margin-bottom:11px;padding-bottom:11px;border-bottom:1px dashed var(--line)}
.side-list li:last-child{margin-bottom:0;padding-bottom:0;border-bottom:0}
.side-list a{text-decoration:none;font-size:13.5px;color:var(--text);line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.side-list a:hover{color:var(--brand)}
.side-list .time{display:block;font-size:12px;color:#94a3b8;margin-top:4px}

/* ---------- 页脚 ---------- */
.site-foot{border-top:1px solid var(--line);background:#fff;margin-top:60px;padding:34px 0}
.foot-main .foot-brand{font-weight:700;color:var(--ink);font-size:15px}
.foot-main .foot-desc{font-size:13px;color:var(--muted);margin-top:5px}
.foot-cats{display:flex;gap:8px 16px;flex-wrap:wrap;margin-top:12px}
.foot-cats a{font-size:13px;color:var(--muted);text-decoration:none}
.foot-cats a:hover{color:var(--brand)}
.foot-meta{font-size:12.5px;color:#94a3b8;margin-top:14px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.foot-meta a{color:var(--muted);text-decoration:none}
.foot-meta a:hover{color:var(--brand)}

/* ---------- 404 ---------- */
.err404{text-align:center;padding:64px 20px 8px;max-width:620px;margin:0 auto}
.err404-code{font-size:80px;font-weight:800;line-height:1;color:#e2e8f0;letter-spacing:-3px}
.err404 h1{font-size:22px;margin:12px 0 10px;color:var(--ink)}
.err404-tip{font-size:14px;color:var(--muted);margin:0 0 24px}
.err404-search{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);padding:4px 4px 4px 18px}
.err404-search input{padding:10px 12px}
.err404-search button{padding:10px 22px}
.err404-links{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:22px}
.btn-primary-link{background:var(--brand);color:#fff;padding:10px 20px;border-radius:9px;text-decoration:none;font-size:14px;font-weight:600}
.btn-primary-link:hover{background:var(--brand-dark)}
.btn-plain-link{background:#fff;border:1px solid var(--line);color:var(--text);padding:10px 18px;border-radius:9px;text-decoration:none;font-size:14px}
.btn-plain-link:hover{border-color:#c7d2fe;color:var(--brand)}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .cards{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:960px){
  .cat-grid{grid-template-columns:repeat(4,1fr)}
  .cards{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
  .article-side{display:none}
}
@media (max-width:640px){
  .nav-toggle{display:block}
  .nav-links{
    display:none;position:absolute;top:62px;left:0;right:0;background:#fff;
    flex-direction:column;align-items:stretch;padding:10px 14px 16px;gap:2px;
    box-shadow:0 18px 28px -18px rgba(15,23,42,.18);
    border-bottom:1px solid var(--line);
  }
  body.nav-open .nav-links{display:flex}
  .nav-links a{padding:11px 12px}
  .hero{padding:48px 0 52px}
  .hero h1{font-size:26px}
  .hero-stats{gap:12px;flex-wrap:wrap}
  .cat-grid{grid-template-columns:repeat(3,1fr);gap:10px}
  .cards{grid-template-columns:1fr;gap:14px}
  .article-head{padding:20px}
  .article-head h1{font-size:21px}
  .article-body{padding:20px;font-size:15.5px}
  .pager-links{flex-direction:column}
  .pager-links .next{text-align:left}
  .comments{padding:20px}
  .comment-fields{grid-template-columns:1fr}
}