:root{
  --paper:#e9eff1;
  --paper-deep:#dce5e8;
  --ink:#0f1b22;
  --muted:#60737c;
  --line:#b7c5ca;
  --signal:#e23b32;
  --cobalt:#1255d6;
  --teal:#0f7c6c;
  --white:#f8fbfb;
  --sans:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",system-ui,sans-serif;
  --serif:"Songti SC","Noto Serif CJK SC","STSong","Times New Roman",serif;
}
*{box-sizing:border-box}
html{background:var(--paper);color:var(--ink);scroll-behavior:smooth}
body{
  margin:0;
  min-width:320px;
  font-family:var(--sans);
  background:
    linear-gradient(rgba(15,27,34,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(15,27,34,.035) 1px,transparent 1px),
    var(--paper);
  background-size:32px 32px;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:linear-gradient(90deg,transparent 0 92%,rgba(18,85,214,.035) 92% 100%);
}
a{color:inherit}
button,input{font:inherit}
button{color:inherit}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.signal-line{height:4px;background:var(--ink);position:relative;overflow:hidden}
.signal-line span{display:block;height:100%;width:18%;background:var(--signal);animation:pulseTravel 4.8s linear infinite}
@keyframes pulseTravel{from{transform:translateX(-110%)}to{transform:translateX(660%)}}
.masthead{
  min-height:74px;
  padding:14px clamp(20px,4vw,64px);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  border-bottom:1px solid var(--ink);
  background:rgba(233,239,241,.94);
  backdrop-filter:blur(12px);
  position:sticky;
  top:0;
  z-index:20;
}
.brand{display:flex;align-items:baseline;gap:14px;text-decoration:none}
.brand strong{font:900 clamp(25px,3vw,38px)/1 var(--serif);letter-spacing:.03em}
.brand span{font-size:10px;font-weight:800;letter-spacing:.2em;color:var(--muted)}
.masthead-meta{display:flex;align-items:center;gap:18px;font-variant-numeric:tabular-nums}
.masthead-meta time{font-size:13px;font-weight:800;letter-spacing:.08em}
.live-badge{display:inline-flex;align-items:center;gap:7px;background:var(--signal);color:white;padding:6px 9px;font-size:10px;font-weight:900;letter-spacing:.12em}
.live-badge i{width:6px;height:6px;border-radius:50%;background:white;box-shadow:0 0 0 0 rgba(255,255,255,.8);animation:livePulse 1.8s infinite}
@keyframes livePulse{70%{box-shadow:0 0 0 7px rgba(255,255,255,0)}100%{box-shadow:0 0 0 0 rgba(255,255,255,0)}}
.shell{
  width:min(1660px,100%);
  margin:0 auto;
  display:grid;
  grid-template-columns:minmax(190px,.72fr) minmax(0,2.3fr) minmax(220px,.86fr);
}
.rail,.desk{padding:32px clamp(18px,2.6vw,38px) 48px}
.rail{border-right:1px solid var(--line)}
.desk{border-left:1px solid var(--line)}
.rail-label{margin:0 0 10px;color:var(--muted);font-size:10px;font-weight:900;letter-spacing:.16em;text-transform:uppercase}
.clock-block{padding-bottom:30px;border-bottom:1px solid var(--line)}
.main-clock{display:block;font:800 clamp(30px,3.2vw,48px)/1 var(--serif);font-variant-numeric:tabular-nums;letter-spacing:-.04em}
.date-line{margin:12px 0 0;color:var(--muted);font-size:12px}
.channel-nav{padding:28px 0;border-bottom:1px solid var(--line)}
.channel-list{display:grid;gap:3px}
.channel-button{
  width:100%;
  border:0;
  border-left:3px solid transparent;
  background:transparent;
  padding:9px 10px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  cursor:pointer;
  text-align:left;
  font-weight:700;
  transition:background .18s,border-color .18s,color .18s;
}
.channel-button:hover{background:rgba(18,85,214,.07)}
.channel-button[aria-current="true"]{border-left-color:var(--signal);background:var(--white);color:var(--cobalt)}
.channel-button small{color:var(--muted);font-weight:700;font-variant-numeric:tabular-nums}
.update-block{padding-top:28px}
.connection-state{display:flex;gap:10px;align-items:flex-start;padding:13px 0 18px;border-bottom:1px solid var(--line)}
.connection-state strong{display:block;font-size:13px}
.connection-state small{display:block;margin-top:3px;color:var(--muted);font-size:11px}
.state-dot{width:9px;height:9px;margin-top:4px;border-radius:50%;background:#a0adb2;flex:0 0 auto}
.connection-state.ok .state-dot{background:var(--teal);box-shadow:0 0 0 4px rgba(15,124,108,.12)}
.connection-state.error .state-dot{background:var(--signal);box-shadow:0 0 0 4px rgba(226,59,50,.12)}
.update-stats{margin:16px 0 0;display:grid;gap:10px}
.update-stats div{display:flex;justify-content:space-between;gap:12px}
.update-stats dt{color:var(--muted);font-size:11px}
.update-stats dd{margin:0;font-size:11px;font-weight:800;font-variant-numeric:tabular-nums}
.feed{padding:34px clamp(22px,3.2vw,54px) 64px;min-width:0}
.feed-header{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;border-bottom:3px solid var(--ink);padding-bottom:20px}
.desk-kicker{margin:0 0 8px;color:var(--cobalt);font-size:10px;font-weight:900;letter-spacing:.18em}
.feed-header h1{margin:0;font:900 clamp(38px,5vw,74px)/.92 var(--serif);letter-spacing:-.05em}
.search-box{width:min(260px,42vw);border-bottom:2px solid var(--ink);display:flex;align-items:center}
.search-box input{width:100%;border:0;background:transparent;padding:10px 2px;outline:0;font-size:13px}
.search-box:focus-within{border-color:var(--cobalt)}
.new-item-notice{height:0;overflow:hidden;background:var(--cobalt);color:white;font-size:12px;font-weight:800;transition:height .25s,padding .25s}
.new-item-notice.visible{height:38px;padding:10px 14px}
.lead-story{padding:28px 0 30px;border-bottom:1px solid var(--ink)}
.lead-card{display:grid;gap:14px}
.lead-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.category-pill{display:inline-block;padding:3px 7px;background:var(--ink);color:white;font-size:10px;font-weight:800;letter-spacing:.05em}
.lead-source,.lead-time{color:var(--muted);font-size:11px;font-weight:700}
.lead-link{text-decoration:none}
.lead-link:hover .lead-title{color:var(--cobalt)}
.lead-title{margin:0;font:900 clamp(30px,4.2vw,58px)/1.14 var(--serif);letter-spacing:-.025em;transition:color .18s}
.lead-summary{max-width:70ch;margin:14px 0 0;color:#40535c;font-size:15px;line-height:1.8}
.lead-foot{display:flex;justify-content:space-between;gap:16px;border-top:1px solid var(--line);padding-top:12px;color:var(--muted);font-size:10px;font-weight:800;letter-spacing:.08em}
.feed-toolbar{min-height:58px;display:flex;align-items:center;justify-content:space-between;gap:18px;border-bottom:1px solid var(--line)}
.feed-toolbar p{margin:0;color:var(--muted);font-size:11px}
.feed-toolbar p strong{color:var(--ink);font-size:16px}
#filterHint{margin-left:8px}
.toolbar-actions{display:flex;align-items:center;gap:8px}
.text-button,.refresh-button{border:0;cursor:pointer;font-size:11px;font-weight:800;padding:9px 12px}
.text-button{background:transparent;color:var(--muted)}
.text-button:hover,.text-button[aria-pressed="true"]{color:var(--cobalt);background:rgba(18,85,214,.08)}
.refresh-button{background:var(--ink);color:white}
.refresh-button:hover{background:var(--cobalt)}
.refresh-button:disabled{opacity:.55;cursor:wait}
.news-list{display:grid}
.news-item{border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.news-item::before{content:"";position:absolute;inset:0 auto 0 0;width:0;background:var(--cobalt);transition:width .2s}
.news-item.is-new::before{width:4px}
.news-link{
  display:grid;
  grid-template-columns:42px minmax(0,1fr) auto;
  gap:16px;
  padding:20px 10px 20px 0;
  text-decoration:none;
  align-items:start;
  transition:background .18s,padding .18s;
}
.news-link:hover{background:rgba(248,251,251,.82);padding-left:10px}
.news-index{padding-top:4px;color:var(--muted);font:800 11px/1 var(--serif);font-variant-numeric:tabular-nums}
.news-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.news-source{color:var(--muted);font-size:10px;font-weight:700}
.news-title{margin:7px 0 0;font:800 clamp(18px,1.55vw,25px)/1.35 var(--serif);letter-spacing:-.012em;transition:color .18s}
.news-link:hover .news-title{color:var(--cobalt)}
.news-summary{max-width:76ch;margin:8px 0 0;color:#596a72;font-size:12px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-time{min-width:56px;text-align:right;font-variant-numeric:tabular-nums;padding-top:3px}
.news-time time{display:block;font-size:12px;font-weight:900}
.relative-time{display:block;margin-top:5px;color:var(--muted);font-size:9px}
.empty-state{border-bottom:1px solid var(--line);padding:48px 0;color:var(--muted)}
.empty-state strong{color:var(--ink);font:800 24px/1.2 var(--serif)}
.empty-state p{font-size:12px}
.panel{padding:0 0 28px;margin:0 0 28px;border-bottom:1px solid var(--line)}
.panel:last-child{border-bottom:0}
.panel-heading{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.panel-heading .rail-label{margin-bottom:14px}
.panel-heading>span{color:var(--muted);font-size:10px;font-weight:800}
.source-list{display:grid}
.source-row{display:grid;grid-template-columns:8px minmax(0,1fr) auto;gap:9px;align-items:center;padding:8px 0;border-top:1px solid rgba(183,197,202,.7);font-size:11px}
.source-row:first-child{border-top:0}
.source-light{width:7px;height:7px;border-radius:50%;background:#9aa8ad}
.source-row.ok .source-light{background:var(--teal)}
.source-row.error .source-light{background:var(--signal)}
.source-row strong{display:block;font-size:11px}
.source-row small{display:block;margin-top:2px;color:var(--muted);font-size:9px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:130px}
.source-row em{font-style:normal;color:var(--muted);font-size:10px;font-variant-numeric:tabular-nums}
.timeline-preview{list-style:none;padding:0;margin:0;display:grid}
.timeline-preview li{display:grid;grid-template-columns:48px minmax(0,1fr);gap:10px;padding:10px 0;border-top:1px solid rgba(183,197,202,.7)}
.timeline-preview li:first-child{border-top:0}
.timeline-preview time{font-size:10px;font-weight:900;font-variant-numeric:tabular-nums}
.timeline-preview span{font-size:11px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.methodology p:not(.rail-label){margin:0 0 12px;color:var(--muted);font-size:11px;line-height:1.75}
footer{border-top:1px solid var(--ink);padding:20px clamp(20px,4vw,64px);display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:10px;font-weight:700}
:focus-visible{outline:3px solid var(--cobalt);outline-offset:3px}
@media (max-width:1080px){
  .shell{grid-template-columns:180px minmax(0,1fr)}
  .desk{grid-column:1/-1;border-left:0;border-top:1px solid var(--ink);display:grid;grid-template-columns:repeat(3,1fr);gap:34px}
  .desk .panel{border-bottom:0;margin-bottom:0}
}
@media (max-width:760px){
  .masthead{position:static;padding:12px 18px}
  .brand span,.masthead-meta time{display:none}
  .shell{display:block}
  .rail{border-right:0;border-bottom:1px solid var(--ink);padding:20px 18px}
  .clock-block{padding-bottom:16px}
  .main-clock{font-size:36px}
  .channel-nav{padding:18px 0}
  .channel-list{display:flex;overflow-x:auto;gap:4px;padding-bottom:3px}
  .channel-button{width:auto;flex:0 0 auto;border-left:0;border-bottom:3px solid transparent;white-space:nowrap}
  .channel-button[aria-current="true"]{border-left-color:transparent;border-bottom-color:var(--signal)}
  .update-block{display:none}
  .feed{padding:26px 18px 46px}
  .feed-header{align-items:flex-start;flex-direction:column;gap:16px}
  .feed-header h1{font-size:48px}
  .search-box{width:100%}
  .lead-title{font-size:32px;line-height:1.2}
  .lead-summary{font-size:13px}
  .feed-toolbar{align-items:flex-start;flex-direction:column;padding:14px 0}
  .news-link{grid-template-columns:30px minmax(0,1fr);gap:10px;padding:17px 4px}
  .news-time{grid-column:2;min-width:0;text-align:left;display:flex;gap:8px;padding:0}
  .news-title{font-size:20px}
  .news-summary{-webkit-line-clamp:3}
  .desk{display:block;padding:26px 18px 40px}
  .desk .panel{margin-bottom:28px;padding-bottom:22px;border-bottom:1px solid var(--line)}
  footer{flex-direction:column;padding:18px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto!important;animation:none!important;transition:none!important}
}