/* ===== RED THEME — 笔杆子网 · 三栏信息流 ===== */
*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#dc2626;--primary-dark:#b91c1c;--primary-light:#fca5a5;--accent:#ef4444;--bg:#fef2f2;--text:#1a1a1a;--muted:#71717a;--card:#fff;--border:#fecaca}
body{font-family:-apple-system,"Microsoft YaHei",Arial,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.8}
a{color:var(--primary);text-decoration:none}a:hover{color:var(--primary-dark);text-decoration:underline}
.wrap{max-width:1240px;margin:0 auto;padding:0 16px}

/* ——— 宽幅红色banner头部 ——— */
.site-header{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff;padding:0}
.banner-strip{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.site-logo{font-size:24px;font-weight:900;letter-spacing:1px;text-shadow:1px 1px 3px rgba(0,0,0,.3)}
.site-logo a{color:#fff}.site-logo span{font-size:12px;display:block;font-weight:400;opacity:.7;margin-top:2px}
.header-stats{display:flex;gap:24px;font-size:12px;color:#fca5a5}
.header-stats strong{display:block;font-size:18px;color:#fff;font-weight:700}
.site-nav{background:rgba(0,0,0,.25);border-top:1px solid rgba(255,255,255,.15)}
.site-nav .wrap{display:flex;flex-wrap:wrap}
.site-nav a{display:inline-block;color:#fca5a5;padding:10px 14px;font-size:13px;border-right:1px solid rgba(255,255,255,.1);transition:background .2s}
.site-nav a:first-child{border-left:1px solid rgba(255,255,255,.1)}
.site-nav a:hover{background:rgba(255,255,255,.15);color:#fff;text-decoration:none}

/* ——— 三栏布局（首页）——— */
.three-col{display:grid;grid-template-columns:200px 1fr 200px;gap:18px;padding:20px 0}
.col-left,.col-right{display:flex;flex-direction:column;gap:14px}

/* ——— 侧边面板 ——— */
.side-panel{background:var(--card);border-radius:6px;border:1px solid var(--border);overflow:hidden}
.side-panel-hd{background:var(--primary);color:#fff;padding:9px 14px;font-size:13px;font-weight:700}
.side-panel-body{padding:10px 0}
.side-panel-list{list-style:none}
.side-panel-list li{padding:6px 14px;border-bottom:1px solid #fff7f7;font-size:13px}
.side-panel-list li:last-child{border:none}
.side-panel-list a{color:var(--text)}.side-panel-list a:hover{color:var(--primary)}
.side-panel-list .sp-count{float:right;font-size:11px;color:var(--muted);background:#f4f4f5;padding:1px 6px;border-radius:10px}

/* ——— 中间内容区（首页）——— */
.col-main{min-width:0}
.ticker{background:var(--card);border:1px solid var(--border);border-radius:6px;padding:10px 14px;margin-bottom:14px;display:flex;align-items:center;gap:10px;font-size:13px}
.ticker-label{background:var(--primary);color:#fff;padding:2px 8px;border-radius:3px;font-size:11px;white-space:nowrap;font-weight:700}
.ticker-content{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ——— 文章信息流 ——— */
.feed-item{background:var(--card);border:1px solid var(--border);border-radius:6px;padding:14px;margin-bottom:12px;display:flex;align-items:flex-start;gap:12px}
.feed-num{width:28px;height:28px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;flex-shrink:0;margin-top:1px}
.feed-body{flex:1;min-width:0}
.feed-title{font-size:14px;font-weight:600;color:var(--text);display:block;margin-bottom:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.feed-title:hover{color:var(--primary)}
.feed-meta{font-size:11px;color:var(--muted);display:flex;gap:12px}
.feed-cat{color:var(--primary)}

/* ——— 面包屑 ——— */
.breadcrumb{font-size:13px;color:var(--muted);padding:12px 0;border-bottom:1px solid var(--border);margin-bottom:16px}
.breadcrumb a{color:var(--muted)}.breadcrumb a:hover{color:var(--primary)}

/* ——— 分类页：双栏（左分类树|右列表）——— */
.cat-layout{display:grid;grid-template-columns:200px 1fr;gap:18px;padding:16px 0}
.cat-tree{background:var(--card);border:1px solid var(--border);border-radius:6px;overflow:hidden;height:fit-content}
.cat-tree-hd{background:var(--primary);color:#fff;padding:10px 14px;font-size:14px;font-weight:700}
.cat-tree-list{list-style:none;padding:6px 0}
.cat-tree-list li{border-bottom:1px solid #fff7f7}
.cat-tree-list li:last-child{border:none}
.cat-tree-list a{display:flex;justify-content:space-between;padding:8px 14px;font-size:13px;color:var(--text)}
.cat-tree-list a:hover{background:var(--bg);color:var(--primary);text-decoration:none}
.cat-tree-list .ct-count{font-size:11px;color:var(--muted);background:#f4f4f5;padding:1px 6px;border-radius:10px}
.cat-main-panel{background:var(--card);border:1px solid var(--border);border-radius:6px;padding:16px}
.art-flow{list-style:none}
.art-flow li{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid #fff7f7;font-size:13px}
.art-flow li:last-child{border:none}
.art-flow li::before{content:'▶';color:var(--primary);margin-right:8px;font-size:10px}
.art-flow a{flex:1;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.art-flow a:hover{color:var(--primary)}
.art-flow .af-date{color:var(--muted);font-size:11px;white-space:nowrap;margin-left:8px}

/* ——— 分页 ——— */
.pager{display:flex;justify-content:center;gap:6px;padding:18px 0;flex-wrap:wrap}
.pager a,.pager span{padding:5px 13px;border-radius:4px;font-size:13px;border:1px solid var(--border);background:var(--card);color:var(--text)}
.pager a:hover{border-color:var(--primary);color:var(--primary);text-decoration:none}
.pager .cur{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ——— 文章页：正文居中+底部双栏 ——— */
.article-hero{background:var(--primary);color:#fff;padding:28px 0}
.article-hero h1{font-size:22px;font-weight:700;line-height:1.4;margin-bottom:10px}
.article-hero-meta{display:flex;gap:20px;font-size:12px;color:#fca5a5}
.article-center{max-width:860px;margin:0 auto;padding:24px 16px}
.article-intro{background:#fff;border:1px solid var(--border);border-left:4px solid var(--primary);padding:14px 16px;border-radius:0 6px 6px 0;margin-bottom:20px;font-size:14px;color:var(--muted)}
.article-body{background:#fff;border:1px solid var(--border);border-radius:6px;padding:24px;font-size:15px;line-height:2}
.article-body p{text-indent:2em;margin-bottom:10px}
.article-body h2,.article-body h3{text-indent:0;margin:22px 0 10px;color:var(--primary-dark);font-size:17px}
.article-outro{background:#fff;border:1px solid var(--border);border-radius:6px;padding:14px 16px;margin-top:16px;font-size:14px;color:var(--muted)}

/* ——— 文章底部双栏 ——— */
.bottom-two-col{max-width:860px;margin:20px auto 0;padding:0 16px;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.b2-panel{background:var(--card);border:1px solid var(--border);border-radius:6px;padding:14px}
.b2-panel-hd{font-size:14px;font-weight:700;color:var(--primary);padding-bottom:8px;border-bottom:1px solid var(--border);margin-bottom:10px}
.b2-list{list-style:none}
.b2-list li{padding:6px 0;border-bottom:1px dashed var(--border);font-size:13px}
.b2-list li:last-child{border:none}
.b2-list a{color:var(--text)}.b2-list a:hover{color:var(--primary)}

/* ——— Footer ——— */
.site-footer{background:var(--primary-dark);color:#fca5a5;text-align:center;padding:20px 0;font-size:13px;margin-top:30px}
.site-footer a{color:#fecaca}

/* ——— 404 ——— */
.err-page{text-align:center;padding:80px 20px}
.err-banner{background:var(--primary);color:#fff;padding:40px;border-radius:12px;display:inline-block;min-width:320px}
.err-banner .err-num{font-size:96px;font-weight:900;line-height:1;color:rgba(255,255,255,.3)}
.err-banner h2{font-size:20px;margin:8px 0}
.err-banner p{font-size:14px;color:#fca5a5;margin-bottom:20px}
.btn-red{display:inline-block;background:#fff;color:var(--primary);padding:9px 26px;border-radius:4px;font-size:14px;font-weight:700}
.btn-red:hover{background:var(--bg);text-decoration:none;color:var(--primary)}

@media(max-width:768px){
  .three-col{grid-template-columns:1fr}
  .col-left,.col-right{display:none}
  .cat-layout{grid-template-columns:1fr}
  .cat-tree{display:none}
  .bottom-two-col{grid-template-columns:1fr}
  .article-hero h1{font-size:18px}
  .site-nav a{padding:8px 10px;font-size:12px}
  .banner-strip{flex-direction:column;align-items:flex-start;gap:8px}
  .header-stats{display:none}
}

.col-right{position:sticky;top:20px;align-self:flex-start}

/* 移动端导航优化 */
@media(max-width:768px){
  .site-nav,.nav,.top-nav{
    overflow-x:auto;
    white-space:nowrap;
    -webkit-overflow-scrolling:touch;
    padding:8px 10px;
    scrollbar-width:none;
  }
  .site-nav::-webkit-scrollbar,.nav::-webkit-scrollbar,.top-nav::-webkit-scrollbar{display:none}
  .site-nav a,.nav a,.top-nav a{
    display:inline-block;
    white-space:nowrap;
    padding:4px 10px;
    font-size:13px;
  }
}

/* 移动端首页分类数量限制 */
@media(max-width:768px){
  .card:nth-child(n+6),.cat-card:nth-child(n+6),.mag-card:nth-child(n+7),.cat-section:nth-child(n+6),.feed-section:nth-child(n+6){
    display:none;
  }
}

.cat-tree-list{max-height:600px;overflow-y:auto}
.cat-tree-list::-webkit-scrollbar{width:4px}
.cat-tree-list::-webkit-scrollbar-thumb{background:#ddd;border-radius:2px}

.cat-title{font-size:22px;font-weight:600;margin:15px 0 10px;padding:0}

.cat-title{font-size:24px;font-weight:600;margin:15px 0;color:#333}
.cat-layout{display:flex;gap:20px;margin:15px 0}
.cat-tree{width:200px;flex-shrink:0}
.cat-tree-hd{background:#dc2626;color:#fff;padding:10px 15px;font-weight:600;border-radius:6px 6px 0 0}
.cat-main-panel{flex:1;min-width:0}
.art-flow{list-style:none;padding:0;margin:0}
.art-flow li{display:flex;align-items:center;padding:10px 0;border-bottom:1px solid #f0f0f0}
.art-flow .af-num{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;background:#dc2626;color:#fff;border-radius:50%;font-size:12px;margin-right:10px;flex-shrink:0}
.art-flow li a{color:#333;text-decoration:none;flex:1}
.art-flow li a:hover{color:#dc2626}
.af-date{color:#999;font-size:13px;white-space:nowrap;margin-left:10px}
.pager{text-align:center;margin:25px 0;display:flex;justify-content:center;gap:5px}
.pager a,.pager span{display:inline-block;padding:6px 14px;border:1px solid #ddd;border-radius:4px;text-decoration:none;color:#333;font-size:14px}
.pager .cur{background:#dc2626;color:#fff;border-color:#dc2626}
.pager a:hover{background:#fff0f0}
@media(max-width:768px){
  .cat-layout{flex-direction:column}
  .cat-tree{width:100%}
  .cat-tree-list{max-height:200px}
}

/* 移动端防溢出 */
html,body{overflow-x:hidden;max-width:100vw}
.article-body,.art-content,.content-body,.article-body-wrap{overflow-x:auto;word-break:break-word;overflow-wrap:break-word}
.article-body table{max-width:100%;overflow-x:auto;display:block}
.article-body img{max-width:100%;height:auto}
.article-body pre,.article-body code{white-space:pre-wrap;word-break:break-all;max-width:100%}
.wrap,.container{max-width:100%;overflow-x:hidden}
@media(max-width:768px){
  .article-layout,.page-body,.page-shell{flex-direction:column}
  .article-sidebar,.side-col,.left-nav{width:100%!important;position:static!important}
  .article-main,.main-col,.right-content{width:100%!important;margin:0!important}
}

/* 悬浮复制按钮 */
.copy-btn{
  position:fixed;
  right:20px;
  bottom:80px;
  background:#dc2626;
  color:#fff;
  padding:10px 16px;
  border-radius:30px;
  cursor:pointer;
  box-shadow:0 4px 12px rgba(0,0,0,.2);
  z-index:999;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  white-space:nowrap;
  flex-wrap:nowrap;
  transition:all .3s;
  user-select:none;
}
.copy-btn:hover{background:#b91c1c;transform:translateY(-2px);box-shadow:0 6px 16px rgba(0,0,0,.25)}
.copy-btn.copied{background:#16a34a}
.copy-icon{font-size:18px}
@media(max-width:768px){
  .copy-btn{
    right:12px;
    bottom:20px;
    padding:10px 14px;
    font-size:13px;
    border-radius:25px;
  }
}