:root{
  --bg:#070a11; --bg2:#0d1320; --panel:#0f1525; --panel2:#131b30; --line:#202a44;
  --ink:#eef2fb; --dim:#93a0bb; --faint:#5d6680;
  --accent:#5b8cff;
  --c-reasoning-agents:#5b8cff; --c-coding-long-context:#36d6b0;
  --c-efficiency-serving:#ffb454; --c-native-multimodal:#c77dff; --c-alignment-safety:#ff6b81;
  --r:16px;
  --shadow:0 24px 70px rgba(0,0,0,.55);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);overflow:hidden;
  font:14px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft Yahei",sans-serif;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
button{font:inherit;cursor:pointer}
::selection{background:rgba(91,140,255,.35)}

/* ---------- 顶栏 ---------- */
.topbar{
  position:fixed;top:0;left:0;right:0;height:62px;z-index:30;
  display:flex;align-items:center;gap:18px;padding:0 24px;
  background:linear-gradient(180deg,rgba(10,14,22,.92),rgba(10,14,22,.66));
  backdrop-filter:blur(14px);border-bottom:1px solid var(--line);
}
.brand{font-size:18px;font-weight:800;letter-spacing:.3px;color:#fff;text-decoration:none;flex-shrink:0}
.brand span{color:var(--accent);margin-left:3px;font-weight:700}
.search{flex:1;max-width:540px;position:relative}
.search::before{content:"";position:absolute;left:13px;top:50%;width:15px;height:15px;transform:translateY(-50%);
  background:no-repeat center/contain url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2393a0bb' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='M21 21l-4.3-4.3'/%3E%3C/svg%3E");opacity:.8;pointer-events:none}
.search input{
  width:100%;height:40px;padding:0 14px 0 36px;border-radius:11px;
  background:rgba(13,19,32,.9);border:1px solid var(--line);color:var(--ink);outline:none;
  transition:border-color .15s,box-shadow .15s;
}
.search input::placeholder{color:#5d6680}
.search input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(91,140,255,.18)}
.stats{display:flex;gap:18px;color:var(--dim);font-size:12.5px;white-space:nowrap}
.stats b{color:var(--ink);font-weight:700;font-variant-numeric:tabular-nums}
.time-toggle{
  height:40px;padding:0 16px;border-radius:11px;border:1px solid var(--line);
  background:var(--panel);color:var(--dim);font-weight:600;font-size:13px;transition:.18s;flex-shrink:0;
}
.time-toggle:hover{color:var(--ink);border-color:#34416a}
.time-toggle[aria-pressed="true"]{color:#fff;background:linear-gradient(180deg,#1a294b,#14203c);
  border-color:var(--accent);box-shadow:0 0 0 1px var(--accent) inset,0 6px 20px rgba(91,140,255,.25)}

/* ---------- 舞台 / 地图 ---------- */
.stage{position:absolute;inset:62px 0 0 0}
.atlas-wrap{position:absolute;inset:0;
  background:
    radial-gradient(1500px 820px at 36% -12%,rgba(28,46,86,.55) 0,rgba(7,10,17,0) 60%),
    radial-gradient(1100px 700px at 88% 120%,rgba(86,40,110,.28) 0,rgba(7,10,17,0) 55%),
    var(--bg);}
.atlas-wrap::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(125% 125% at 50% 50%,transparent 70%,rgba(0,0,0,.32) 100%)}
#atlas{width:100%;height:100%;display:block;touch-action:none;position:relative;z-index:1}

/* 星空 */
#atlas .star{fill:#9fb2d8}
/* 连线 */
#atlas .edge{stroke:var(--ec,#2c3858);stroke-width:1.4;fill:none;opacity:.38;
  transition:stroke-width .15s,opacity .2s}
#atlas .edge.hot{stroke-width:2.2;opacity:.9}
#atlas .edge-hit{stroke:transparent;stroke-width:18;fill:none;cursor:help}

/* 节点 */
#atlas .node{cursor:pointer;transition:transform .6s cubic-bezier(.22,1,.36,1)}
#atlas .node-inner{opacity:0;transform:scale(.6);transform-origin:center;
  transition:opacity .45s ease,transform .45s ease}
#atlas .node.in .node-inner{opacity:1;transform:scale(1)}
#atlas .node .glow{filter:url(#glow);transition:opacity .2s;opacity:.6}
#atlas .node .ring{fill:none;stroke-width:1.8;transition:stroke-width .2s,r .2s}
#atlas .node .disc{transition:r .2s}
#atlas .node .cnt{font-size:13px;font-weight:800;fill:#fff;text-anchor:middle;pointer-events:none;
  dominant-baseline:middle;font-variant-numeric:tabular-nums;text-shadow:0 1px 3px rgba(0,0,0,.6)}
#atlas .node .lbl{font-size:12px;font-weight:600;fill:#d6deef;text-anchor:middle;pointer-events:none;
  paint-order:stroke;stroke:rgba(7,10,17,.85);stroke-width:3px;stroke-linejoin:round}
#atlas .node:hover .node-inner{transform:scale(1.04)}
#atlas .node:hover .glow{opacity:.85}
#atlas .node:hover .ring{stroke-width:2.6}
#atlas.dim .node:not(.hot){opacity:.2}
#atlas.dim .edge:not(.hot){opacity:.08}

/* 主轴图例 */
.legend{position:absolute;left:18px;bottom:18px;z-index:2;display:flex;flex-direction:column;gap:7px;
  background:rgba(13,19,32,.6);border:1px solid var(--line);border-radius:12px;padding:11px 13px;
  backdrop-filter:blur(8px)}
.legend .lg{display:flex;align-items:center;gap:8px;font-size:11.5px;color:var(--dim)}
.legend .lg i{width:9px;height:9px;border-radius:50%;flex-shrink:0;box-shadow:0 0 8px currentColor}

.phase-heads{position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .4s;z-index:2}
.phase-heads.show{opacity:1}
.phase-heads .ph{position:absolute;top:12px;transform:translateX(-50%);width:170px;text-align:center;
  color:#c6d0e6;font-size:13px;font-weight:700;letter-spacing:.3px}
.phase-heads .ph::after{content:"";position:absolute;left:50%;top:42px;bottom:-560px;width:1px;
  background:linear-gradient(180deg,rgba(91,140,255,.35),transparent)}
.phase-heads .ph i{display:block;color:var(--faint);font-weight:500;font-size:11px;margin-top:3px;font-style:normal}

.hint{position:absolute;left:0;right:0;bottom:18px;margin:0;text-align:center;
  color:#566080;font-size:12px;pointer-events:none;z-index:2}

.recent-bar{position:absolute;top:104px;left:50%;transform:translateX(-50%);z-index:10;
  background:linear-gradient(180deg,rgba(15,21,37,.92),rgba(13,19,32,.88));backdrop-filter:blur(6px);
  border:1px solid #2a3958;border-radius:14px;padding:10px 14px;display:flex;align-items:center;gap:12px;
  box-shadow:0 8px 28px rgba(0,0,0,.4);max-width:min(92vw,880px)}
.recent-bar[hidden]{display:none}
.rb-label{font-size:12px;font-weight:700;color:#7aa2ff;white-space:nowrap}
.rb-list{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.rb-list::-webkit-scrollbar{display:none}
.rb-item{flex-shrink:0;max-width:220px;background:rgba(22,32,58,.7);border:1px solid #2e3a5c;
  border-radius:10px;padding:7px 11px;color:#cdd6e8;font-size:11.5px;cursor:pointer;transition:.14s;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;text-align:left}
.rb-item:hover{background:rgba(91,140,255,.14);border-color:#5b8cff;color:#fff}
.rb-month{display:inline-block;background:rgba(91,140,255,.2);color:#7aa2ff;padding:2px 6px;
  border-radius:6px;font-size:10px;margin-right:6px;font-weight:700}

.daily-teaser{position:absolute;top:16px;left:50%;transform:translateX(-50%);z-index:14;
  display:grid;grid-template-columns:58px minmax(0,1fr) auto;align-items:center;gap:14px;width:min(860px,82vw);
  min-height:74px;padding:12px 14px;background:linear-gradient(180deg,rgba(14,21,36,.94),rgba(10,15,27,.88));
  border:1px solid #2d3d61;border-radius:14px;box-shadow:0 18px 48px rgba(0,0,0,.42);
  backdrop-filter:blur(10px);color:#eef2fb;text-decoration:none;transition:.16s}
.daily-teaser[hidden]{display:none}
.daily-teaser:hover{border-color:#5b8cff;background:linear-gradient(180deg,rgba(20,31,54,.96),rgba(13,20,36,.92));transform:translateX(-50%) translateY(-1px)}
.dt-figure{width:52px;height:50px;border-radius:12px;border:1px solid #35486e;background:rgba(91,140,255,.09);
  display:grid;grid-template-columns:1fr 1fr;gap:5px;padding:8px}
.dt-figure i{display:block;border-radius:6px;background:linear-gradient(135deg,#5b8cff,#36d6b0);opacity:.82}
.dt-figure i:nth-child(2){background:linear-gradient(135deg,#ffb454,#c77dff)}
.dt-figure i:nth-child(3){background:linear-gradient(135deg,#36d6b0,#ff6b81)}
.dt-figure i:nth-child(4){background:linear-gradient(135deg,#c77dff,#5b8cff)}
.dt-main{min-width:0;display:flex;flex-direction:column;gap:4px}
.dt-kicker{color:#ffcf82;font-size:11px;font-weight:760;font-variant-numeric:tabular-nums}
.dt-title{color:#fff;font-size:14px;font-weight:760;line-height:1.35;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.dt-topics{display:flex;gap:6px;min-height:20px;overflow:hidden}
.dt-topics i{font-style:normal;flex-shrink:0;color:#b6c3dc;background:rgba(91,140,255,.11);border:1px solid #2d3b5e;
  border-radius:7px;padding:2px 7px;font-size:11px}
.dt-action{flex-shrink:0;color:#cfe0ff;border:1px solid rgba(91,140,255,.55);background:rgba(91,140,255,.11);
  border-radius:10px;padding:8px 11px;font-size:12px;font-weight:720}

.atlas-tip{position:fixed;z-index:50;pointer-events:none;max-width:300px;
  background:rgba(12,19,34,.97);border:1px solid rgba(91,140,255,.6);border-radius:11px;padding:10px 13px;
  font-size:12.5px;line-height:1.5;opacity:0;transition:opacity .12s;box-shadow:var(--shadow)}
.atlas-tip b{color:#fff}.atlas-tip i{color:var(--dim);font-style:normal}

/* ---------- 论文行(搜索结果复用) ---------- */
.paper-row{display:flex;align-items:center;gap:10px;width:100%;text-align:left;
  background:rgba(16,24,43,.7);border:1px solid var(--line);border-radius:11px;padding:11px 13px;margin:9px 0;
  color:var(--ink);transition:.16s;position:relative}
.paper-row:hover{border-color:rgba(91,140,255,.6);background:rgba(20,32,58,.9);transform:translateX(2px)}
.paper-row .pbody{flex:1;min-width:0}
.paper-row .pt{font-weight:600;font-size:13px;display:block;line-height:1.42}
.paper-row .ppreview{display:block;color:#aeb8cd;font-size:11.5px;line-height:1.5;margin-top:4px}
.paper-row .pm{color:var(--dim);font-size:11.5px;margin-top:5px;display:block}
.paper-row .pc{display:inline-block;background:rgba(91,140,255,.12);color:#8fb0ff;border-radius:5px;padding:1px 6px;margin-right:4px;font-size:10.5px}
.paper-row .parrow{color:var(--faint);font-size:16px;transition:.16s;flex-shrink:0}
.paper-row:hover .parrow{color:var(--accent);transform:translateX(2px)}

/* ---------- 论文查看器 ---------- */
.paper-viewer{position:absolute;inset:0;z-index:40;background:#070a11;display:none;flex-direction:column}
.paper-viewer.open{display:flex}
.pv-bar{height:48px;display:flex;align-items:center;justify-content:space-between;
  padding:0 16px;border-bottom:1px solid var(--line);background:var(--panel);font-size:13px}
.pv-bar #pvTitle{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-right:12px}
.pv-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.pv-actions a,.pv-actions button{color:var(--dim);text-decoration:none;background:none;border:1px solid var(--line);
  border-radius:9px;padding:6px 11px;font-size:12.5px;transition:.15s}
.pv-actions a:hover,.pv-actions button:hover{color:#fff;border-color:var(--accent)}
.pv-actions #pvClose{border-color:transparent;font-size:18px;padding:2px 9px}
#pvFrame{flex:1;border:0;width:100%;background:#fff}

/* ---------- 搜索结果 ---------- */
.search-results{position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:min(560px,94vw);max-height:72vh;overflow-y:auto;z-index:28;
  background:var(--panel2);border:1px solid var(--line);border-top:0;
  border-radius:0 0 var(--r) var(--r);box-shadow:var(--shadow);padding:8px}
.search-results .sr-meta{color:var(--dim);font-size:12px;padding:7px 11px}
.search-results .paper-row{margin:6px 4px}

/* ---------- 窄屏退化 ---------- */
.mobile-list{position:absolute;inset:0;overflow-y:auto;padding:18px 16px 40px;display:flex;flex-direction:column;gap:12px}
.mobile-list[hidden]{display:none}
.mobile-list .mcard{background:var(--panel);border:1px solid var(--line);border-radius:13px;padding:15px 16px;border-left:4px solid}
.mobile-list .mcard h3{margin:0 0 5px;font-size:16px}
.mobile-list .mcard p{margin:0;color:var(--dim);font-size:13px;line-height:1.5}
.mobile-list .mcard .mc-count{float:right;color:var(--dim);font-size:12px;font-weight:700}

@media (max-width:760px){
  .topbar{padding:0 16px;gap:10px}
  .brand{font-size:16px}
  .search{flex:0 0 52px}
  .search input{width:52px;color:transparent;padding-right:0}
  .search input::placeholder{color:transparent}
  .stats,.time-toggle,.gnav{display:none!important}
  .atlas-wrap,.legend,.daily-teaser{display:none}
  body{overflow-x:hidden}
}

/* 工作空间覆盖层 */
.workspace-overlay{position:fixed;inset:0;z-index:500;background:rgba(5,8,15,.85);backdrop-filter:blur(4px);
  display:flex;align-items:center;justify-content:center;animation:fadeIn .2s}
.workspace-overlay[hidden]{display:none}
.ws-panel{width:min(94vw,920px);max-height:85vh;background:linear-gradient(180deg,#0f1525,#0d1320);
  border:1px solid #2a355a;border-radius:16px;box-shadow:0 12px 44px rgba(0,0,0,.6);display:flex;flex-direction:column}
.ws-head{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-bottom:1px solid #1e2a44}
.ws-head h2{margin:0;font-size:18px;color:#eef2fb}
.ws-head button{background:none;border:0;color:#7a86a0;font-size:28px;cursor:pointer;line-height:1;padding:0;width:32px;height:32px}
.ws-head button:hover{color:#fff}
.ws-tabs{display:flex;gap:8px;padding:14px 22px;border-bottom:1px solid #1a2438}
.ws-tab{background:rgba(22,32,58,.5);border:1px solid #2e3a5c;border-radius:10px;padding:7px 14px;color:#aab4ca;
  font-size:13px;cursor:pointer;transition:.14s}
.ws-tab:hover{background:rgba(91,140,255,.12);border-color:#5b8cff;color:#fff}
.ws-tab.active{background:linear-gradient(180deg,#5b8cff,#3f6fe0);border-color:#5b8cff;color:#fff}
.ws-list{flex:1;overflow-y:auto;padding:18px 22px;min-height:320px}
.ws-loading,.ws-empty{text-align:center;color:#7a86a0;padding:60px 20px}
.ws-empty p{margin:.6em 0}
.ws-hint{font-size:12px;color:#5d6680}
.ws-paper{display:flex;align-items:center;gap:14px;padding:14px;background:rgba(15,21,37,.6);border:1px solid #202a44;
  border-radius:12px;margin-bottom:10px;cursor:pointer;transition:.14s}
.ws-paper:hover{background:rgba(22,32,58,.8);border-color:#2e3a5c}
.ws-paper-body{flex:1;min-width:0}
.ws-paper h4{margin:0 0 6px;font-size:14px;font-weight:600;color:#eef2fb;line-height:1.4}
.ws-preview{color:#aab8cd;font-size:12px;line-height:1.5;margin:5px 0}
.ws-meta{color:#7a86a0;font-size:11.5px;margin:5px 0 0}
.ws-status{background:#16203a;border:1px solid #2e3a5c;color:#cdd6e8;border-radius:8px;padding:6px 10px;
  font-size:12px;cursor:pointer}
.ws-status:hover{border-color:#5b8cff}

#pvStar{background:transparent;border:1px solid #2e3a5c;color:#aab4ca}
#pvStar:hover{background:rgba(255,193,7,.12);border-color:#ffc107;color:#ffc107}
#pvStar[data-starred="1"]{background:rgba(255,193,7,.18);border-color:#ffc107;color:#ffc107}
#myPapersBtn{margin-left:auto}

/* 入门论文横幅 */
.pv-banner{padding:9px 16px;background:linear-gradient(90deg,rgba(91,140,255,.18),rgba(91,140,255,.06));
  border-bottom:1px solid rgba(91,140,255,.3);color:#bcd0ff;font-size:12.5px;font-weight:600;text-align:center}
.pv-banner[hidden]{display:none}

/* 通知角标 */
#notifBtn{position:relative}
.badge{position:absolute;top:-4px;right:-4px;min-width:18px;height:18px;padding:0 5px;border-radius:9px;
  background:#ff4d6a;color:#fff;font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 0 2px var(--bg)}
.badge[hidden]{display:none}

/* 通知覆盖层 */
.notif-overlay{position:fixed;inset:0;z-index:500;background:rgba(5,8,15,.85);backdrop-filter:blur(4px);
  display:flex;align-items:center;justify-content:center}
.notif-overlay[hidden]{display:none}
.notif-panel{width:min(94vw,560px);max-height:80vh;background:linear-gradient(180deg,#0f1525,#0d1320);
  border:1px solid #2a355a;border-radius:16px;box-shadow:0 12px 44px rgba(0,0,0,.6);display:flex;flex-direction:column}
.notif-head{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-bottom:1px solid #1e2a44}
.notif-head h2{margin:0;font-size:18px;color:#eef2fb}
.notif-head button{background:none;border:0;color:#7a86a0;font-size:28px;cursor:pointer;line-height:1}
.notif-head button:hover{color:#fff}
.notif-list{flex:1;overflow-y:auto;padding:14px 18px;min-height:200px}
.notif-empty{text-align:center;color:#7a86a0;padding:60px 20px}
.notif-item{display:flex;align-items:flex-start;gap:12px;padding:13px 14px;background:rgba(15,21,37,.6);
  border:1px solid #202a44;border-radius:11px;margin-bottom:9px;cursor:pointer;transition:.14s}
.notif-item:hover{background:rgba(22,32,58,.8);border-color:#5b8cff}
.notif-dot{flex-shrink:0;width:8px;height:8px;border-radius:50%;background:transparent;margin-top:6px}
.notif-item.unread .notif-dot{background:#5b8cff;box-shadow:0 0 8px #5b8cff}
.notif-body{flex:1;min-width:0}
.notif-title{margin:0 0 4px;font-size:13px;font-weight:600;color:#eef2fb;line-height:1.4}
.notif-meta{margin:0;font-size:11.5px;color:#7a86a0}

/* ---------- 2026-06-11 交互升级 ---------- */
.search-results .paper-row.kb-active{border-color:var(--accent);background:rgba(91,140,255,.16)}
.search-results mark{background:rgba(255,180,84,.28);color:#ffd9a0;border-radius:3px;padding:0 2px}
.sr-retry{cursor:pointer;color:#ffb454}
.sr-retry:hover{color:#ffd9a0}
.pv-progress{height:2px;background:rgba(91,140,255,.15);overflow:hidden}
.pv-progress[hidden]{display:none}
.pv-progress i{display:block;height:100%;width:38%;border-radius:2px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
  animation:pvSlide 1.1s linear infinite}
@keyframes pvSlide{from{transform:translateX(-110%)}to{transform:translateX(380%)}}