/* AI视频日报 - 深色科技感主题 */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg-primary:#0a0e1a;
  --bg-secondary:#111827;
  --bg-card:#1a1f2e;
  --bg-hover:#222838;
  --text-primary:#e2e8f0;
  --text-secondary:#94a3b8;
  --text-muted:#64748b;
  --accent:#00d4ff;
  --accent-glow:rgba(0,212,255,.15);
  --border:rgba(255,255,255,.08);
  --radius:12px;
  --shadow:0 4px 24px rgba(0,0,0,.4);
  --max-width:1200px;
}
html{scroll-behavior:smooth}
body{
  background:var(--bg-primary);
  color:var(--text-primary);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:15px;line-height:1.7;
  min-height:100vh;
}
a{color:inherit;text-decoration:none;transition:color .2s}
a:hover{color:var(--accent)}

/* --- Top Navigation --- */
.topnav{
  position:sticky;top:0;z-index:100;
  background:rgba(10,14,26,.95);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  max-width:var(--max-width);margin:0 auto;
  padding:0 20px;height:60px;
  display:flex;align-items:center;gap:20px;
}
.logo{display:flex;align-items:center;gap:8px;flex-shrink:0}
.logo-icon{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;
  background:linear-gradient(135deg,var(--accent),#a855f7);
  border-radius:8px;font-weight:700;font-size:14px;color:#fff;
}
.logo-text{font-size:18px;font-weight:700;letter-spacing:1px}
.nav-cats{display:flex;gap:4px;flex:1;overflow-x:auto;scrollbar-width:none}
.nav-cats::-webkit-scrollbar{display:none}
.nav-cat-link{
  display:flex;align-items:center;gap:6px;
  padding:6px 12px;border-radius:8px;
  font-size:13px;color:var(--text-secondary);
  white-space:nowrap;transition:all .2s;
}
.nav-cat-link:hover{background:var(--bg-hover);color:var(--text-primary)}
.cat-icon{
  display:inline-flex;align-items:center;justify-content:center;
  width:20px;height:20px;border-radius:4px;
  font-size:11px;font-weight:700;color:#fff;
}
.nav-right{display:flex;align-items:center;gap:12px;flex-shrink:0}
.search-form{display:flex;gap:0}
.search-input{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-right:none;
  border-radius:8px 0 0 8px;
  padding:8px 14px;color:var(--text-primary);
  font-size:13px;width:180px;outline:none;
  transition:border-color .2s;
}
.search-input:focus{border-color:var(--accent)}
.search-input::placeholder{color:var(--text-muted)}
.search-btn{
  background:var(--accent);color:#000;
  border:none;border-radius:0 8px 8px 0;
  padding:8px 16px;font-size:13px;font-weight:600;
  cursor:pointer;transition:opacity .2s;
}
.search-btn:hover{opacity:.85}
.nav-archive{
  font-size:13px;color:var(--text-secondary);
  padding:8px 12px;border-radius:8px;
  transition:all .2s;
}
.nav-archive:hover{background:var(--bg-hover);color:var(--text-primary)}

/* --- Container --- */
.container{
  max-width:var(--max-width);
  margin:0 auto;padding:24px 20px;
}

/* --- Date Bar --- */
.date-bar{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:24px;padding:16px 24px;
  background:linear-gradient(135deg,rgba(0,212,255,.08),rgba(168,85,247,.08));
  border:1px solid var(--border);
  border-radius:var(--radius);
}
.date-display{font-size:22px;font-weight:700}
.date-slogan{font-size:13px;color:var(--text-secondary)}

/* --- Main Content Layout --- */
.main-content{display:flex;gap:24px}
.content-main{flex:1;min-width:0}
.sidebar{width:280px;flex-shrink:0}

/* --- Headline --- */
.headline-section{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:28px;margin-bottom:24px;
  position:relative;overflow:hidden;
}
.headline-section::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--accent),#a855f7);
}
.headline-badge{
  display:inline-block;
  background:linear-gradient(135deg,var(--accent),#a855f7);
  color:#000;font-size:12px;font-weight:700;
  padding:4px 12px;border-radius:20px;
  margin-bottom:12px;
}
.headline-title{font-size:24px;font-weight:700;line-height:1.4;margin-bottom:12px}
.headline-title a:hover{color:var(--accent)}
.headline-summary{color:var(--text-secondary);font-size:15px;line-height:1.8;margin-bottom:16px}
.headline-meta{display:flex;align-items:center;gap:16px;flex-wrap:wrap}

/* --- Category Filter --- */
.category-filter{
  display:flex;gap:8px;margin-bottom:20px;
  flex-wrap:wrap;
}
.cat-filter-btn{
  display:flex;align-items:center;gap:6px;
  padding:6px 14px;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:20px;
  color:var(--text-secondary);
  font-size:13px;cursor:pointer;
  transition:all .2s;
}
.cat-filter-btn:hover{border-color:var(--accent);color:var(--text-primary)}
.cat-filter-btn.active{
  background:var(--accent-glow);
  border-color:var(--accent);
  color:var(--accent);
}
.filter-dot{width:8px;height:8px;border-radius:50%}

/* --- News List --- */
.news-list{display:flex;flex-direction:column;gap:16px}
.news-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:20px 24px;
  transition:all .2s;
}
.news-card:hover{
  border-color:rgba(0,212,255,.3);
  background:var(--bg-hover);
  transform:translateY(-2px);
  box-shadow:var(--shadow);
}
.card-header{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:10px;
}
.card-cat{
  display:inline-block;font-size:11px;font-weight:600;
  padding:2px 10px;border-radius:4px;
  border:1px solid;
}
.card-time{font-size:12px;color:var(--text-muted)}
.card-title{font-size:17px;font-weight:600;line-height:1.5;margin-bottom:8px}
.card-title a:hover{color:var(--accent)}
.card-summary{
  color:var(--text-secondary);font-size:14px;
  line-height:1.7;margin-bottom:12px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card-footer{
  display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:8px;
}
.card-tags{display:flex;gap:6px;flex-wrap:wrap}
.tag{
  font-size:11px;color:var(--text-muted);
  background:rgba(255,255,255,.05);
  padding:2px 8px;border-radius:4px;
}
.tag-lg{font-size:12px;padding:4px 10px}
.card-meta{display:flex;align-items:center;gap:12px}
.card-source{font-size:12px;color:var(--text-muted)}
.card-source-link{font-size:12px;color:var(--accent);text-decoration:none;transition:color .2s}
.card-source-link:hover{color:var(--accent-hover);text-decoration:underline}

/* --- Detail Original Link --- */
.detail-original-link{margin:20px 0;text-align:center}
.btn-original{display:inline-block;padding:10px 28px;border-radius:8px;font-size:14px;font-weight:500;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-hover));text-decoration:none;transition:all .3s;box-shadow:0 2px 12px rgba(99,102,241,.3)}
.btn-original:hover{transform:translateY(-2px);box-shadow:0 4px 20px rgba(99,102,241,.5)}

/* --- Share Buttons --- */
.share-buttons{display:flex;align-items:center;gap:6px}
.share-label{font-size:12px;color:var(--text-muted)}
.share-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:28px;height:28px;border-radius:6px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--border);
  color:var(--text-secondary);cursor:pointer;
  transition:all .2s;
}
.share-btn:hover{background:var(--accent-glow);border-color:var(--accent);color:var(--accent)}
.share-wechat:hover{background:rgba(7,193,96,.15);border-color:#07c160;color:#07c160}
.share-weibo:hover{background:rgba(230,40,40,.15);border-color:#e62828;color:#e62828}
.share-twitter:hover{background:rgba(29,161,242,.15);border-color:#1da1f2;color:#1da1f2}

/* --- Ad Slots --- */
.ad-slot{
  background:rgba(255,255,255,.02);
  border:1px dashed var(--border);
  border-radius:var(--radius);
  display:flex;align-items:center;justify-content:center;
  min-height:90px;
}
.ad-inline{margin:4px 0}
.ad-sidebar{min-height:200px;margin-bottom:16px}
.ad-placeholder{color:var(--text-muted);font-size:13px}

/* --- Sidebar --- */
.sidebar-section{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:16px;margin-bottom:16px;
}
.sidebar-title{
  font-size:14px;font-weight:600;
  margin-bottom:12px;color:var(--text-primary);
}
.sidebar-cats{display:flex;flex-direction:column;gap:6px}
.sidebar-cat-link{
  display:flex;align-items:center;gap:8px;
  padding:6px 8px;border-radius:6px;
  font-size:13px;color:var(--text-secondary);
  transition:all .2s;
}
.sidebar-cat-link:hover{background:var(--bg-hover);color:var(--text-primary)}
.sidebar-archive{display:flex;flex-direction:column;gap:8px}
.archive-link{
  display:flex;flex-direction:column;gap:2px;
  padding:8px;border-radius:6px;
  transition:background .2s;
}
.archive-link:hover{background:var(--bg-hover)}
.archive-date{font-size:12px;color:var(--accent)}
.archive-title{font-size:12px;color:var(--text-secondary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* --- Detail Page --- */
.back-btn{
  display:inline-block;margin-bottom:16px;
  font-size:13px;color:var(--text-secondary);
  padding:6px 14px;border-radius:8px;
  background:var(--bg-card);
  border:1px solid var(--border);
  transition:all .2s;
}
.back-btn:hover{border-color:var(--accent);color:var(--accent)}
.detail-article{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:32px;
}
.detail-header{margin-bottom:24px;padding-bottom:20px;border-bottom:1px solid var(--border)}
.detail-title{font-size:26px;font-weight:700;line-height:1.4;margin:12px 0}
.detail-meta{display:flex;align-items:center;gap:16px;margin-top:12px}
.detail-tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:12px}
.detail-content{font-size:15px;line-height:1.9;color:var(--text-primary)}
.detail-content p{margin-bottom:16px}
.detail-content h3{font-size:18px;margin:24px 0 12px;color:var(--accent)}
.detail-content h4{font-size:16px;margin:20px 0 10px;color:var(--text-primary)}
.detail-content .content-item{padding-left:20px;position:relative}
.detail-content .content-item::before{content:'';position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--accent)}
.detail-share{
  margin-top:28px;padding-top:20px;
  border-top:1px solid var(--border);
  display:flex;justify-content:flex-end;
}

/* --- Related News --- */
.related-section{margin-top:24px}
.related-title{font-size:16px;font-weight:600;margin-bottom:12px}
.related-list{display:flex;flex-direction:column;gap:8px}
.related-card{
  display:flex;align-items:center;gap:10px;
  padding:12px 16px;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:8px;
  transition:all .2s;
}
.related-card:hover{border-color:var(--accent);background:var(--bg-hover)}
.related-card-title{font-size:14px;color:var(--text-secondary);flex:1}

/* --- Archive Page --- */
.page-title{font-size:22px;font-weight:700;margin-bottom:8px}
.page-desc{color:var(--text-secondary);font-size:14px;margin-bottom:20px}
.archive-list{display:flex;flex-direction:column;gap:12px}
.archive-item{
  display:flex;align-items:center;gap:16px;
  padding:16px 20px;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  transition:all .2s;
}
.archive-item:hover{border-color:var(--accent);background:var(--bg-hover);transform:translateX(4px)}
.archive-item-date{font-size:14px;font-weight:600;color:var(--accent);min-width:180px}
.archive-item-title{flex:1;font-size:14px;color:var(--text-primary)}
.archive-item-count{font-size:12px;color:var(--text-muted)}

/* --- Category Page --- */
.category-header{
  border-left:3px solid var(--accent);
  padding-left:16px;margin-bottom:20px;
}

/* --- Search Page --- */
.search-count{color:var(--text-secondary);font-size:14px;margin-bottom:16px}

/* --- Empty State --- */
.empty-state{
  text-align:center;padding:60px 20px;
  color:var(--text-secondary);
}
.empty-state h2{font-size:48px;color:var(--text-muted);margin-bottom:12px}
.empty-state p{margin-bottom:8px}

/* --- Toast --- */
.toast{
  position:fixed;bottom:30px;left:50%;
  transform:translateX(-50%) translateY(100px);
  background:var(--bg-card);
  border:1px solid var(--accent);
  color:var(--text-primary);
  padding:10px 24px;border-radius:8px;
  font-size:14px;z-index:9999;
  opacity:0;transition:all .3s;
  pointer-events:none;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* --- QR Modal --- */
.qr-modal{
  position:fixed;top:0;left:0;width:100%;height:100%;
  background:rgba(0,0,0,.7);z-index:9999;
  display:flex;align-items:center;justify-content:center;
}
.qr-modal-content{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:32px;text-align:center;
  position:relative;max-width:320px;
}
.qr-close{
  position:absolute;top:8px;right:12px;
  font-size:24px;color:var(--text-muted);cursor:pointer;
}
.qr-code{
  width:200px;height:200px;margin:16px auto;
  background:#fff;border-radius:8px;
  display:flex;align-items:center;justify-content:center;
}

/* --- Footer --- */
.footer{
  margin-top:40px;
  border-top:1px solid var(--border);
  background:var(--bg-secondary);
}
.footer-inner{
  max-width:var(--max-width);margin:0 auto;
  padding:24px 20px;
  display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:12px;
}
.footer-info{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-secondary)}
.footer-links{display:flex;gap:16px}
.footer-links a{font-size:13px;color:var(--text-secondary)}
.footer-links a:hover{color:var(--accent)}
.footer-copy{font-size:12px;color:var(--text-muted)}

/* --- Responsive --- */
@media(max-width:900px){
  .main-content{flex-direction:column}
  .sidebar{width:100%;order:2}
  .content-main{order:1}
  .nav-cats{display:none}
}
@media(max-width:600px){
  .container{padding:16px 12px}
  .nav-inner{padding:0 12px;gap:8px}
  .search-input{width:120px}
  .nav-archive{display:none}
  .date-display{font-size:18px}
  .date-slogan{display:none}
  .headline-title{font-size:20px}
  .detail-title{font-size:20px}
  .detail-article{padding:20px 16px}
  .news-card{padding:16px}
  .card-footer{flex-direction:column;align-items:flex-start}
  .archive-item{flex-direction:column;align-items:flex-start;gap:4px}
  .archive-item-date{min-width:auto}
  .footer-inner{flex-direction:column;text-align:center}
}

/* Hidden ad slots */
.ad-hidden{display:none}