/* ============ 主题变量 ============ */
:root{
  --sbw:286px;
  --dpw:392px;
  --bg:#070b17;
  --bg2:#0b1122;
  --panel:#101a30;
  --panel2:#16223c;
  --line:#22314f;
  --line2:#2e4064;
  --text:#e9eefb;
  --muted:#8fa1c4;
  --muted2:#6b7ea6;
  --accent:#6ea8fe;
  --accent2:#22d3ee;
  --ok:#34d399;
  --warn:#fbbf24;
  --danger:#fb7185;
  --shadow:0 18px 46px rgba(0,0,0,.5);
  --node-bg:rgba(255,255,255,.035);
  --grid:rgba(255,255,255,.045);
}
html[data-theme="light"]{
  --bg:#eef2f9;
  --bg2:#f7f9fd;
  --panel:#ffffff;
  --panel2:#f2f5fb;
  --line:#dde4f0;
  --line2:#c9d4e6;
  --text:#131c31;
  --muted:#5c6b8a;
  --muted2:#8493b0;
  --accent:#2f6fe4;
  --accent2:#0891b2;
  --ok:#0f9d63;
  --warn:#c2790a;
  --danger:#d6455f;
  --shadow:0 14px 34px rgba(24,44,86,.14);
  --node-bg:rgba(15,32,66,.035);
  --grid:rgba(20,40,80,.05);
}

*{box-sizing:border-box}
[hidden]{display:none !important}
html,body{height:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB",
              "Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:14px;
  line-height:1.55;
  overflow:hidden;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,p{margin:0}
button{font-family:inherit}
.muted{color:var(--muted);font-weight:400}

/* ============ 顶栏 ============ */
.topbar{
  height:62px;
  display:flex;
  align-items:center;
  gap:18px;
  padding:0 18px;
  background:linear-gradient(180deg,var(--panel) 0%,var(--bg2) 100%);
  border-bottom:1px solid var(--line);
  position:relative;
  z-index:30;
}
.topbar-prog{
  position:absolute;left:0;right:0;bottom:0;height:3px;
  background:transparent;overflow:hidden;pointer-events:none;
}
.topbar-prog i{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--accent),var(--ok));
  transition:width .35s;
}
.brand{display:flex;align-items:center;gap:11px;min-width:250px}
.logo{
  width:36px;height:36px;flex:0 0 36px;
  display:grid;place-items:center;
  border-radius:11px;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#04101f;font-size:20px;font-weight:700;
  box-shadow:0 6px 18px rgba(110,168,254,.35);
}
.brand-text h1{font-size:15.5px;font-weight:700;letter-spacing:.3px}
.brand-text p{font-size:11.5px;color:var(--muted);margin-top:1px}

.search-wrap{position:relative;flex:1;max-width:520px}
#search{
  width:100%;height:36px;
  padding:0 14px 0 34px;
  border-radius:10px;
  border:1px solid var(--line);
  background:var(--bg2);
  color:var(--text);
  font-size:13px;
  outline:none;
  transition:border-color .15s, box-shadow .15s;
}
#search::placeholder{color:var(--muted2)}
#search:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(110,168,254,.16)}
.search-wrap::before{
  content:"⌕";position:absolute;left:12px;top:50%;transform:translateY(-50%);
  color:var(--muted2);font-size:16px;pointer-events:none;
}
.suggest{
  position:absolute;top:42px;left:0;right:0;
  background:var(--panel);
  border:1px solid var(--line2);
  border-radius:12px;
  box-shadow:var(--shadow);
  max-height:340px;overflow:auto;
  padding:6px;
  z-index:40;
}
.suggest div{
  padding:7px 10px;border-radius:8px;cursor:pointer;font-size:13px;
  display:flex;justify-content:space-between;gap:10px;align-items:center;
}
.suggest div:hover,.suggest div.on{background:var(--panel2)}
.suggest small{color:var(--muted);font-size:11px;white-space:nowrap}

.top-actions{display:flex;gap:8px;margin-left:auto}
#btn-menu{display:none;width:34px;height:34px;padding:0;font-size:15px;flex:0 0 34px}
.scrim{
  position:fixed;inset:62px 0 0 0;background:rgba(3,7,18,.5);
  z-index:35;display:none;
}

/* ============ 按钮 ============ */
.btn{
  height:34px;padding:0 13px;
  border-radius:9px;
  border:1px solid var(--line2);
  background:var(--panel2);
  color:var(--text);
  font-size:12.5px;
  cursor:pointer;
  transition:.15s;
  white-space:nowrap;
}
.btn:hover{border-color:var(--accent);color:var(--accent)}
.btn.tiny{height:28px;padding:0 10px;font-size:12px}
.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));border:none;color:#04101f;font-weight:600}
.btn.danger:hover{border-color:var(--danger);color:var(--danger)}
.btn.round{width:34px;height:34px;padding:0;border-radius:50%;font-size:15px}
.btn.ghost{background:transparent}

/* ============ 布局 ============ */
.app{
  height:calc(100vh - 62px);
  display:grid;
  grid-template-columns:var(--sbw) 1fr var(--dpw);
  position:relative;
}
.app.no-detail{--dpw:0px}
.splitter{
  position:absolute;top:0;bottom:0;width:7px;z-index:55;
  cursor:col-resize;touch-action:none;
  background:transparent;transition:background .15s;
}
.splitter:hover,.splitter.drag{background:linear-gradient(90deg,transparent,var(--accent),transparent)}
.splitter::after{
  content:'';position:absolute;left:3px;top:0;bottom:0;width:1px;
  background:var(--line2);opacity:.5;transition:opacity .15s;
}
.splitter:hover::after,.splitter.drag::after{opacity:0}
.splitter.sb{left:calc(var(--sbw) - 4px)}
.splitter.dp{right:calc(var(--dpw) - 3px)}
.app.no-detail .splitter.dp{display:none}
.sidebar{
  border-right:1px solid var(--line);
  background:var(--bg2);
  overflow-y:auto;
  padding:12px 12px 16px;
  display:flex;flex-direction:column;gap:9px;
}
.card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:12px;
  padding:12px;
}
.card h2{
  font-size:12px;font-weight:700;letter-spacing:1.4px;
  color:var(--muted);text-transform:uppercase;
  margin-bottom:9px;
  display:flex;justify-content:flex-start;align-items:center;
}
.card h2 > .hd-actions,.card h2 > .muted{margin-left:auto}
.card-h{cursor:pointer;user-select:none;transition:color .13s}
.card-h:hover{color:var(--accent)}
.card-h .chev{
  font-style:normal;font-size:9px;color:var(--muted2);
  width:10px;flex:0 0 10px;text-align:left;margin-right:2px;
  transition:transform .15s;
}
.card-h:hover .chev{color:var(--accent)}
.card.closed .card-body{display:none}
.card.closed h2{margin-bottom:0}
.card.closed{padding-bottom:10px}
.tip{font-size:11px;color:var(--muted2);margin-top:8px;line-height:1.5}
.card .tip{margin-top:6px;font-size:10.5px}
.row{display:flex;gap:7px;margin-top:8px;flex-wrap:wrap}
.pl-row{margin-bottom:5px}

/* 学段分段控件 */
.seg{
  display:flex;gap:3px;
  background:var(--bg2);border:1px solid var(--line);border-radius:10px;padding:3px;
}
.seg button{
  flex:1;min-width:0;
  border:0;background:transparent;color:var(--muted);
  font-size:11.5px;padding:7px 2px;border-radius:7px;cursor:pointer;
  transition:.15s;white-space:nowrap;
}
.seg button:hover{color:var(--text);background:var(--panel2)}
.seg button.on{
  background:var(--sc,var(--accent));color:#06101f;font-weight:700;
  box-shadow:0 2px 10px rgba(0,0,0,.22);
}

/* 领域列表 */
.qgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:5px}
.qbtn{
  display:flex;align-items:center;gap:5px;
  height:29px;padding:0 6px;
  border-radius:9px;border:1px solid var(--line);
  background:var(--bg2);color:var(--text);
  font-size:11px;cursor:pointer;transition:.14s;font-family:inherit;
  white-space:nowrap;overflow:hidden;
}
.qbtn i{
  font-style:normal;font-size:12.5px;color:var(--accent);
  width:13px;flex:0 0 13px;text-align:center;
}
.qbtn.danger i{color:var(--danger)}
.qbtn:hover{border-color:var(--accent);background:var(--panel2);transform:translateY(-1px)}
.qbtn.danger:hover{border-color:var(--danger)}
.qbtn:active{transform:none}

.domains{display:flex;flex-direction:column;gap:1px}
.dm{
  display:flex;align-items:center;gap:6px;
  padding:2px 6px;border-radius:7px;cursor:pointer;transition:.15s;
  border:1px solid transparent;
}
.dm:hover{background:var(--panel2)}
.dm.on{background:var(--panel2);border-color:var(--accent)}
.dm.folded{opacity:.5}
.dm.folded .dot{filter:grayscale(.5)}
.dm .chev{
  font-style:normal;font-size:11px;color:var(--muted2);
  width:11px;flex:0 0 11px;text-align:center;line-height:1;
}
.dm .nm{font-size:12px}
.dm .dot{width:9px;height:9px;border-radius:50%;flex:0 0 9px}
.dm .cnt{font-size:10.5px;color:var(--muted);margin-left:auto;font-variant-numeric:tabular-nums}
.dm-focus{
  font-size:10px;color:var(--muted2);background:transparent;
  border:1px solid var(--line2);border-radius:6px;padding:0 5px;height:17px;
  cursor:pointer;line-height:1;flex:0 0 auto;
  opacity:0;transition:opacity .13s;
}
.dm:hover .dm-focus,.dm.on .dm-focus{opacity:1}
.dm-focus:hover{color:var(--accent);border-color:var(--accent)}

.hd-actions{display:flex;gap:4px}
.mini{
  font-size:10.5px;padding:1px 7px;border-radius:6px;height:19px;
  background:var(--panel2);border:1px solid var(--line2);color:var(--muted);
  cursor:pointer;letter-spacing:0;text-transform:none;font-weight:500;
}
.mini:hover{color:var(--accent);border-color:var(--accent)}

/* 二级子分支 */
.dm .chev.tree{cursor:pointer}
.dm .chev.tree:hover{color:var(--accent)}
.subgroups{
  display:flex;flex-direction:column;gap:1px;
  margin:1px 0 5px 15px;padding-left:9px;
  border-left:1px dashed var(--line2);
}
.sg{
  display:flex;align-items:center;gap:6px;
  padding:2px 7px;border-radius:6px;cursor:pointer;
  font-size:11.5px;color:var(--muted);transition:.13s;
}
.sg:hover{background:var(--panel2);color:var(--text)}
.sg.hi{background:var(--panel2);color:var(--text);box-shadow:inset 0 0 0 1px var(--line2)}
.sg.folded{opacity:.45}
.sg .chev{font-style:normal;font-size:9px;color:var(--muted2);width:9px;flex:0 0 9px;text-align:center}
.sg .nm{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sg .cnt{font-size:10.5px;color:var(--muted2);font-variant-numeric:tabular-nums}

/* 悬停子分支时的地图高亮 */
.node.gh .box{stroke-width:2.2}
.node.gh .halo{opacity:.2}

/* 快捷路线 */
.tracks{display:flex;flex-direction:column;gap:6px;max-height:344px;overflow-y:auto;padding-right:2px}
.tk{
  text-align:left;width:100%;
  border:1px solid var(--line);border-radius:10px;
  background:var(--bg2);color:var(--text);
  padding:8px 10px;cursor:pointer;transition:.15s;
}
.tk:hover{border-color:var(--accent);transform:translateX(2px)}
.tk b{display:block;font-size:12.5px;font-weight:600}
.tk span{display:block;font-size:11px;color:var(--muted);margin-top:2px;line-height:1.45}

/* 进度条 */
.bar{height:8px;border-radius:99px;background:var(--panel2);overflow:hidden;border:1px solid var(--line)}
.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--ok));transition:width .35s}
.bar.sm{height:5px;margin-top:3px}
.pl-row{margin-bottom:6px;transition:opacity .2s}
.pl-row.mute{opacity:.42}
.pl-top{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:var(--muted);margin-bottom:2px}
.pl-top span:first-child{display:flex;align-items:center;gap:6px}
.pl-top i{width:7px;height:7px;border-radius:2px;display:inline-block}
.tk-meta{color:var(--accent);margin-top:4px}

/* ============ 画布 ============ */
.stage{position:relative;overflow:hidden;background:var(--bg)}
.stage canvas,.stage svg{display:block}
#map{width:100%;height:100%;cursor:grab;touch-action:none}
#map.grabbing{cursor:grabbing}

svg text{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB",
              "Microsoft YaHei","Noto Sans SC",sans-serif;
  user-select:none;
}

.node{cursor:pointer}
.node .box{
  stroke-width:1.2;
  fill-opacity:.16;
  transition:fill-opacity .22s, filter .15s;
}
.node .accent{transition:.15s}
.node .nm{font-size:14.5px;font-weight:650;fill:var(--text);transition:opacity .18s}
.node .nmeta{font-size:11.5px;fill:var(--muted);transition:opacity .18s}
.node .nstars{font-size:10.5px;letter-spacing:.6px;transition:opacity .18s}
.node .status{stroke:var(--bg);stroke-width:1.8}
.node .stxt{pointer-events:none}
.node:hover .box{filter:brightness(1.25)}
.node.dim{opacity:.17}
.node.pdim{opacity:.3}
.node.sel .box{stroke-width:2.4;filter:drop-shadow(0 6px 16px rgba(0,0,0,.45))}
.node.sel .halo{opacity:.28}
.node .halo{opacity:0;transition:opacity .2s}
.node.anc .box{stroke-dasharray:5 3}
.node.desc .box{stroke-width:1.8}
.node.pdim .halo{opacity:.12}
.node.hit .box{stroke:var(--warn);stroke-width:2.6}
.node .badge{opacity:0;transition:opacity .2s}
.node.onpath .badge{opacity:1}
.node .badge circle{stroke:var(--bg);stroke-width:2}

/* 远视图：只保留色块，隐藏文字 */
#map.far .node .box{fill-opacity:.62}
#map.far .node .nm,
#map.far .node .nmeta,
#map.far .node .nstars{opacity:0}
#map.far .node.sel .box,
#map.far .node.hit .box{fill-opacity:1}
#map.far .node .halo{opacity:.18}
#map.far .node.sel .halo{opacity:.45}
.tl-label{transition:opacity .18s}
#map.far .tl-label{opacity:.75}

.edge{
  fill:none;
  stroke-width:1.3;
  opacity:.26;
  transition:opacity .18s, stroke-width .18s;
}
/* 按跨度分级淡化：中长线（>1500）、超长线（>2600）依次更淡。
   注意这三条要写在 .dim / .hl / .onpath 之前，让那三个状态仍然能覆盖它。 */
.edge.tier1{opacity:.17}
.edge.tier2{opacity:.09}
.edge.dim{opacity:.05}
.edge.hl{opacity:.95;stroke-width:2.2}
.edge.onpath{opacity:1;stroke-width:2.5;stroke-dasharray:none}
/* 大路径（上百个节点）下压暗连线，避免糊成一团 */
#map.bigpath .edge.onpath{opacity:.28;stroke-width:1.5}
#map.bigpath .edge.hl{opacity:.7;stroke-width:1.8}

/* 远视图下连线几乎隐去，只留结构 */
#map.far .edge{opacity:.08}
#map.far .edge.hl{opacity:.8}
#map.far .edge.onpath{opacity:.9}

.band-label{font-size:13px;font-weight:700;fill:var(--muted2)}
.band-sub{font-size:11px;fill:var(--muted2);opacity:.65}
.band-line{stroke:var(--line);stroke-width:1}
.tl-label{font-size:12px;font-weight:700}
.tl-sub{font-size:10.5px;fill:var(--muted2)}

/* HUD */
.hovercard{
  position:fixed;z-index:60;width:320px;
  background:var(--panel);border:1px solid var(--line2);border-radius:13px;
  box-shadow:var(--shadow);padding:13px 14px;
  pointer-events:none;animation:hcfade .13s ease;
}
@keyframes hcfade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.hovercard .hc-head{display:flex;align-items:baseline;gap:8px;margin-bottom:7px;flex-wrap:wrap}
.hovercard .hc-head b{font-size:15.5px;font-weight:700}
.hovercard .hc-head span{font-size:11px;color:var(--bc,var(--accent))}
.hovercard .hc-meta{
  display:flex;gap:12px;flex-wrap:wrap;
  font-size:11.5px;color:var(--muted);margin-bottom:10px;
  padding-bottom:9px;border-bottom:1px solid var(--line);
}
.hovercard .hc-meta b{color:var(--text);font-weight:650}
.hovercard h4{
  font-size:10.5px;letter-spacing:1px;color:var(--muted2);
  font-weight:700;margin:0 0 4px;
}
.hovercard ul{margin:0 0 9px;padding-left:16px}
.hovercard li{font-size:12.5px;margin-bottom:2px;line-height:1.45}
.hovercard li.warn{color:var(--warn)}
.hovercard p{font-size:12.5px;margin:0 0 9px;line-height:1.45}
.hovercard .hc-foot{font-size:10.5px;color:var(--muted2);margin-top:2px}

.band-labels{position:absolute;inset:0;pointer-events:none;overflow:hidden;z-index:9}
.band-tag{
  position:absolute;left:10px;pointer-events:auto;cursor:pointer;
  display:flex;align-items:baseline;gap:7px;
  padding:3px 10px 3px 8px;border-radius:0 8px 8px 0;
  background:color-mix(in srgb, var(--bg) 84%, transparent);
  backdrop-filter:blur(2px);
  border-left:3px solid var(--bc);
  white-space:nowrap;transform:translateY(-50%);
  transition:background .15s;
}
.band-tag:hover{background:color-mix(in srgb, var(--bg) 66%, transparent)}
.band-tag.folded{border-left-style:dashed;padding-right:14px}
.band-tag .chev{font-style:normal;font-size:10px;color:var(--muted2);line-height:1}
.band-tag b{font-size:12px;font-weight:700;color:var(--bc)}
.band-tag span{font-size:10.5px;color:var(--muted2)}

.hud{
  position:absolute;right:16px;bottom:152px;
  display:flex;flex-direction:column;gap:6px;z-index:12;
}
.hud .btn{background:var(--panel);border-color:var(--line2);box-shadow:var(--shadow)}
.hud .btn.pan{
  border-color:var(--accent);color:var(--accent);
  animation:panpulse 1.8s ease-in-out infinite;
}
@keyframes panpulse{
  0%,100%{box-shadow:var(--shadow)}
  50%{box-shadow:var(--shadow),0 0 0 4px rgba(110,168,254,.16)}
}
.hint{
  position:absolute;left:50%;bottom:16px;transform:translateX(-50%);
  font-size:11.5px;color:var(--muted2);
  background:color-mix(in srgb,var(--panel) 82%,transparent);
  padding:5px 14px;border-radius:99px;border:1px solid var(--line);
  pointer-events:none;transition:opacity .5s;z-index:11;
}
.hint.fade{opacity:0}

/* 小地图 */
.minimap{
  position:absolute;right:14px;bottom:14px;
  width:216px;height:126px;
  background:color-mix(in srgb,var(--panel) 90%,transparent);
  border:1px solid var(--line2);border-radius:10px;
  box-shadow:var(--shadow);overflow:hidden;cursor:crosshair;z-index:12;
}
#mini{width:100%;height:100%}
.mini-vp{fill:none;stroke:var(--accent);stroke-width:1.4}

/* ============ 详情面板 ============ */
.plan-drawer{
  position:absolute;right:0;top:62px;height:calc(100vh - 62px);
  width:min(620px,96vw);z-index:70;
  background:var(--bg2);border-left:1px solid var(--line2);
  box-shadow:var(--shadow);
  display:flex;flex-direction:column;
  animation:slidein .2s ease;
}
.pd-head{
  display:flex;align-items:center;gap:10px;
  padding:14px 16px 10px;border-bottom:1px solid var(--line);
}
.pd-head h2{font-size:16px;font-weight:700;flex:1}
.pd-head-actions{display:flex;align-items:center;gap:7px}
.pd-tabs{display:flex;gap:3px;background:var(--panel);border:1px solid var(--line);border-radius:9px;padding:3px}
.pd-tabs button{
  border:0;background:transparent;color:var(--muted);font-size:12px;
  padding:5px 12px;border-radius:6px;cursor:pointer;transition:.15s;white-space:nowrap;
}
.pd-tabs button:hover{color:var(--text)}
.pd-tabs button.on{background:var(--accent);color:#06101f;font-weight:700}
.pd-tab{display:flex;flex-direction:column;flex:1;min-height:0}
.plan-drawer.wide{width:min(980px,96vw)}

/* 方向对照表 */
.ct-row{
  display:grid;grid-template-columns:126px 118px 1fr 118px 150px;
  gap:10px;align-items:start;
  padding:9px 10px;border-radius:10px;cursor:pointer;
  border:1px solid transparent;transition:.13s;
}
.ct-row:hover{background:var(--panel);border-color:var(--line)}
.ct-row.on{background:var(--panel);border-color:var(--accent)}
.ct-row b{font-size:12.5px;font-weight:650;display:block}
.ct-row span{font-size:10.5px;color:var(--muted2);display:block;line-height:1.5}
.ct-c1 b{color:var(--text)}
.ct-c3 i{
  font-style:normal;font-size:10.5px;color:var(--dc);
  border:1px solid color-mix(in srgb,var(--dc) 45%,transparent);
  border-radius:99px;padding:1px 7px;margin:0 4px 4px 0;display:inline-block;
}
.ct-c3 i b{display:inline;font-size:10px;color:var(--muted2);margin-left:4px;font-weight:600}
.ct-c4 em{
  font-style:normal;font-size:10.5px;color:var(--muted2);
  background:linear-gradient(90deg,color-mix(in srgb,var(--ok) 30%,transparent) var(--p),transparent var(--p));
  border-radius:4px;padding:0 4px;
}
.ct-head{
  display:grid;grid-template-columns:126px 118px 1fr 118px 150px;gap:10px;
  padding:0 10px 6px;border-bottom:1px solid var(--line);margin-bottom:6px;
}
.ct-head span{font-size:10.5px;color:var(--muted2);font-weight:700;letter-spacing:.5px}

.bk-item{
  display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:9px;
  cursor:pointer;border:1px solid transparent;transition:.13s;
}
.bk-main{flex:1;min-width:0}
.bk-title{display:flex;align-items:center;gap:10px}
.bk-title b{font-size:13px;font-weight:650;flex:1;min-width:0}
.bk-nodes{
  font-size:11px;color:var(--muted);margin-top:3px;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
  overflow:hidden;
}
.bk-item.zero{cursor:default;opacity:.55}
.bk-item.zero .bk-nodes{color:var(--muted2)}
.bk-item.zero .chev{color:var(--muted2)}
.bk-item:hover{background:var(--panel);border-color:var(--line)}
.bk-item.zero{opacity:.42}
.bk-item .bn{font-size:13px;flex:1}
.bk-item .bc{font-size:11px;color:var(--muted2);font-variant-numeric:tabular-nums}
.bk-item .bar-mini{width:52px;height:5px;border-radius:99px;background:var(--panel2);overflow:hidden}
.bk-item .bar-mini i{display:block;height:100%;background:var(--ok)}
.bk-sub{font-size:11px;color:var(--muted2);padding:2px 10px 8px}
.bk-row{margin-bottom:2px}
.bk-item .chev{font-style:normal;font-size:9px;color:var(--muted2);width:9px;flex:0 0 9px;text-align:center}
.bk-detail{
  padding:8px 10px 10px 28px;margin-bottom:6px;
  border-left:1px dashed var(--line2);margin-left:14px;
}
.bk-sec{margin-bottom:9px}
.bk-sec h5{
  font-size:10.5px;letter-spacing:1px;color:var(--muted2);
  font-weight:700;margin:0 0 5px;
}
.nk{
  display:inline-flex;align-items:baseline;gap:5px;
  font-size:12px;padding:3px 9px;border-radius:99px;margin:0 5px 5px 0;
  background:var(--panel);border:1px solid var(--line);cursor:pointer;
}
.nk:hover{border-color:var(--accent);color:var(--accent)}
.nk i{font-style:normal;font-size:10px;color:var(--muted2)}
.res-link{
  display:block;text-decoration:none;color:var(--text);
  padding:6px 10px;border-radius:8px;margin-bottom:4px;
  background:var(--panel);border:1px solid var(--line);transition:.13s;
}
.res-link:hover{border-color:var(--accent);background:var(--panel2)}
.res-link b{font-size:12.5px;font-weight:600;display:block}
.res-link b::after{content:' ↗';color:var(--muted2);font-size:11px}
.res-link span{font-size:11px;color:var(--muted2)}
.res-link .src{
  font-style:normal;font-size:10px;color:var(--accent);
  border:1px solid var(--line2);border-radius:99px;padding:0 6px;
  margin-left:6px;vertical-align:1px;
}
.bk-sec h5 em{font-style:normal;color:var(--accent);margin-left:4px}
.topic-node{
  display:flex;gap:9px;align-items:baseline;
  padding:5px 0;border-bottom:1px dashed var(--line);
}
.topic-node:last-child{border-bottom:0}
.topic-node b{
  flex:0 0 118px;font-size:12px;font-weight:650;cursor:pointer;
  color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.topic-node b:hover{color:var(--accent)}
.topic-node span{
  flex:1;font-size:11.5px;color:var(--muted);line-height:1.6;
}
.tl{margin:0;padding-left:16px;list-style:disc}
.tl > li{font-size:12.5px;margin-bottom:5px;color:var(--text)}
.tl > li::marker{color:var(--muted2)}
.tl-sub{margin:3px 0 0;padding-left:15px;list-style:circle}
.tl-sub > li{font-size:11.5px;color:var(--muted);margin-bottom:2px;line-height:1.55}
.topic-node .tl{margin:0;padding-left:15px}
.topic-node .tl > li{font-size:12px;margin-bottom:4px}
.topic-node .tl-sub > li{font-size:11px}
.pl-prob{margin:0;padding-left:18px;list-style:decimal}
.pl-prob > li{font-size:12.5px;margin-bottom:4px;color:var(--text);line-height:1.6}
.pl-prob > li::marker{color:var(--accent);font-weight:600;font-size:11px}
.topic-node .pl-prob{margin:0;padding-left:16px}
.topic-node .pl-prob > li{font-size:11.5px;margin-bottom:3px}
.hist{
  padding:6px 9px;border-radius:8px;margin-bottom:5px;
  background:var(--panel);border:1px solid var(--line);
  border-left:3px solid var(--hc,var(--warn));
}
.hist-h{display:flex;align-items:baseline;gap:7px}
.hist-h b{flex:1;font-size:12.5px;font-weight:650;color:var(--text)}
.hist-st{
  font-style:normal;font-size:10px;white-space:nowrap;
  color:var(--hc);border:1px solid var(--hc);border-radius:99px;
  padding:0 6px;line-height:15px;opacity:.9;
}
.hist span{display:block;font-size:11.5px;color:var(--muted);line-height:1.55;margin-top:2px}
.hist .hist-who{color:var(--muted2);font-size:11px}
.hist .hist-read{
  color:var(--accent);font-size:11px;opacity:.85;
  border-top:1px dashed var(--line);padding-top:3px;margin-top:4px;
}
.res-more{
  font-size:11.5px;color:var(--accent);cursor:pointer;
  padding:5px 9px;border:1px dashed var(--line2);border-radius:8px;text-align:center;
}
.res-more:hover{background:var(--panel)}

/* 详情面板：所在章节的其他知识点 */
.sib-block{margin-bottom:9px}
.sib-block:last-child{margin-bottom:0}
.sib-label{
  font-size:10.5px;color:var(--muted2);margin-bottom:5px;
  padding-left:7px;border-left:2px solid var(--line2);
}

.book-ref{
  display:block;font-size:12.5px;color:var(--text);
  padding:5px 9px;border-radius:8px;background:var(--panel);
  border:1px solid var(--line);margin-bottom:4px;cursor:pointer;
}
.book-ref:hover{border-color:var(--accent);color:var(--accent)}
.book-ref span{color:var(--muted2);font-size:11px;margin-left:6px}
.pd-filters{padding:12px 16px;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:9px}
#plan-q{
  width:100%;height:34px;padding:0 12px;border-radius:9px;
  border:1px solid var(--line2);background:var(--panel);color:var(--text);
  font-size:13px;outline:none;
}
#plan-q:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(110,168,254,.15)}
.frow{display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.flabel{font-size:11px;color:var(--muted2);width:66px;flex:0 0 66px}
.seg.sm{display:flex;gap:2px;padding:2px;border-radius:8px;background:var(--panel);border:1px solid var(--line);flex-wrap:wrap}
.seg.sm button{padding:4px 10px;font-size:11.5px;border-radius:6px}
.sel,.num{
  height:28px;border-radius:8px;border:1px solid var(--line2);
  background:var(--panel);color:var(--text);font-size:12px;padding:0 8px;
  font-family:inherit;outline:none;
}
.num{width:64px}
.funit{font-size:11.5px;color:var(--muted)}
.fnote{font-size:11.5px;color:var(--accent)}
.ck{display:flex;align-items:center;gap:5px;font-size:11.5px;color:var(--muted);cursor:pointer}
.ck input{accent-color:var(--accent)}
#plan-domains .chip{cursor:pointer;font-size:11px;padding:2px 9px}
#plan-domains .chip.on{background:var(--panel2);color:var(--text);border-color:var(--accent)}
#plan-domains,#book-list{max-height:88px;overflow-y:auto;padding-right:3px}

.pd-summary{
  padding:10px 16px;font-size:12.5px;color:var(--muted);
  display:flex;gap:16px;flex-wrap:wrap;align-items:center;
  border-bottom:1px solid var(--line);
}
.pd-summary b{color:var(--text);font-size:14px}
.pd-summary .hl{color:var(--accent)}
.pd-actions{display:flex;gap:7px;padding:10px 16px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.pd-list{flex:1;overflow-y:auto;padding:8px 10px 40px}
.pl-group{
  font-size:11px;font-weight:700;color:var(--muted2);letter-spacing:1px;
  padding:10px 6px 5px;
}
.pl-item{
  display:flex;align-items:center;gap:10px;
  padding:7px 9px;border-radius:9px;cursor:pointer;
  border:1px solid transparent;transition:.13s;
}
.pl-item:hover{background:var(--panel);border-color:var(--line)}
.pl-item.sel{border-color:var(--accent);background:var(--panel)}
.pchk{
  width:18px;height:18px;flex:0 0 18px;border-radius:5px;cursor:pointer;
  border:1.6px solid var(--line2);background:transparent;
  display:grid;place-items:center;font-size:11px;color:#05101d;
  padding:0;line-height:1;font-weight:800;
}
.pchk.done{background:var(--ok);border-color:var(--ok)}
.pchk.doing{border-color:var(--accent);background:rgba(110,168,254,.18)}
.pi-main{flex:1;min-width:0}
.pi-main b{display:block;font-size:13px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pi-main span{font-size:11px;color:var(--muted2)}
.pi-meta{text-align:right;font-size:11px;color:var(--muted);white-space:nowrap}
.pi-meta i{display:block;font-style:normal;color:var(--muted2);font-size:10.5px}
.pl-empty{padding:40px 20px;text-align:center;color:var(--muted2);font-size:13px}

.detail{
  width:var(--dpw,392px);
  border-left:1px solid var(--line);
  background:var(--bg2);
  overflow-y:auto;
  padding:16px 16px 60px;
  animation:slidein .22s ease;
}
@keyframes slidein{from{opacity:0;transform:translateX(18px)}to{opacity:1;transform:none}}
.d-head{display:flex;align-items:flex-start;gap:10px;margin-bottom:6px}
.d-head h2{font-size:19px;font-weight:700;line-height:1.3;flex:1}
.d-close{
  width:28px;height:28px;flex:0 0 28px;border-radius:8px;
  border:1px solid var(--line2);background:var(--panel);color:var(--muted);
  cursor:pointer;font-size:15px;line-height:1;
}
.d-close:hover{color:var(--danger);border-color:var(--danger)}
.chips{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0 14px}
.chip{
  font-size:11.5px;padding:2.5px 9px;border-radius:99px;
  border:1px solid var(--line2);color:var(--muted);background:var(--panel);
  cursor:default;
}
.chip.b{color:var(--text);font-weight:600}
.chip.click{cursor:pointer}
.chip.click:hover{border-color:var(--accent);color:var(--accent)}

.meta{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-bottom:14px}
.meta div{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:7px 10px}
.meta span{display:block;font-size:10.5px;color:var(--muted2)}
.meta b{font-size:14px;font-weight:650}

.d-sec{margin-bottom:15px}
.d-sec h3{
  font-size:11px;letter-spacing:1.2px;text-transform:uppercase;
  color:var(--muted2);margin-bottom:7px;font-weight:700;
}
.d-sec .sec-h{
  display:flex;align-items:center;gap:6px;cursor:pointer;
  user-select:none;transition:color .13s;
}
.d-sec .sec-h:hover{color:var(--accent)}
.d-sec .sec-h .chev{
  font-style:normal;font-size:9px;color:var(--muted2);
  width:9px;flex:0 0 9px;text-align:center;
}
.d-sec .sec-h:hover .chev{color:var(--accent)}
.d-sec.closed .sec-body{display:none}
.d-sec.closed{margin-bottom:10px}
.d-head .mini{flex:0 0 auto}
.d-sec ul{margin:0;padding-left:17px}
.d-sec li{font-size:13px;margin-bottom:4px;color:var(--text)}
.d-sec p{font-size:13px;color:var(--text)}
.d-sec li.warn{color:var(--warn)}
.res-item{
  font-size:12.5px;color:var(--muted);padding:6px 9px;border-radius:8px;
  background:var(--panel);border:1px solid var(--line);margin-bottom:5px;
}
.status-row{display:flex;gap:6px;margin-bottom:14px}
.status-row .btn{flex:1;font-size:12px;padding:0 4px}
.btn.st-0{border-color:var(--line2)}
.btn.st-1.on{border-color:var(--accent);color:var(--accent);background:rgba(110,168,254,.12)}
.btn.st-2.on{border-color:var(--ok);color:var(--ok);background:rgba(52,211,153,.12)}
.d-actions{display:flex;gap:8px;flex-wrap:wrap}

/* 路径视图 */
.path-head{margin-bottom:10px}
.path-sum{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:10px 0 14px}
.path-sum div{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:8px;text-align:center}
.path-sum b{display:block;font-size:16px}
.path-sum span{font-size:10.5px;color:var(--muted2)}
.steps{display:flex;flex-direction:column;gap:5px}
.pg{margin-bottom:8px}
.pg-head{
  display:flex;align-items:center;gap:7px;cursor:pointer;user-select:none;
  padding:6px 8px;border-radius:8px;background:var(--panel);
  border:1px solid var(--line);transition:.13s;
}
.pg-head:hover{border-color:var(--accent)}
.pg-head .chev{font-style:normal;font-size:9px;color:var(--muted2);width:9px;flex:0 0 9px;text-align:center}
.pg-head b{font-size:12.5px;font-weight:700}
.pg-meta{margin-left:auto;font-size:11px;color:var(--muted2);font-variant-numeric:tabular-nums}
.pg-body{display:flex;flex-direction:column;gap:5px;margin-top:5px;padding-left:4px}
.pg.closed .pg-body{display:none}
.step{
  display:flex;align-items:center;gap:9px;
  padding:7px 9px;border-radius:9px;border:1px solid var(--line);
  background:var(--panel);cursor:pointer;transition:.15s;
}
.step:hover{border-color:var(--accent)}
.step.cur{border-color:var(--accent);background:rgba(110,168,254,.1)}
.step.done{opacity:.5}
.step .n{
  width:20px;height:20px;flex:0 0 20px;border-radius:50%;
  display:grid;place-items:center;font-size:11px;font-weight:700;
  background:var(--panel2);border:1px solid var(--line2);
}
.step.done .n{background:var(--ok);border-color:var(--ok);color:#04101f}
.step .t{flex:1;min-width:0}
.step .t b{display:block;font-size:12.5px;font-weight:600}
.step .t span{font-size:10.5px;color:var(--muted2)}
.step .h{font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}
.lvl-group{
  font-size:11px;color:var(--muted2);font-weight:700;letter-spacing:1px;
  margin:12px 0 5px;
}

/* ============ 弹窗 & 提示 ============ */
.modal{
  position:fixed;inset:0;z-index:100;
  background:rgba(3,7,18,.66);
  display:grid;place-items:center;padding:24px;
  backdrop-filter:blur(3px);
}
.modal-box{
  width:min(620px,100%);max-height:82vh;overflow:auto;
  background:var(--panel);border:1px solid var(--line2);
  border-radius:18px;padding:22px 24px;box-shadow:var(--shadow);
}
.modal-box h2{font-size:18px;margin-bottom:12px}
.modal-box p,.modal-box li{font-size:13.5px;color:var(--text)}
.modal-box ul{padding-left:19px;margin:8px 0}
.modal-box li{margin-bottom:5px}
.modal-box kbd{
  background:var(--panel2);border:1px solid var(--line2);border-radius:5px;
  padding:1px 6px;font-size:11.5px;font-family:inherit;color:var(--muted);
}
.modal-box .btn{margin-top:16px}
.toast{
  position:fixed;left:50%;bottom:66px;transform:translateX(-50%);
  background:var(--panel);border:1px solid var(--accent);
  color:var(--text);padding:9px 18px;border-radius:11px;
  box-shadow:var(--shadow);z-index:200;font-size:13px;
}

/* ============ 新手引导 ============ */
.guide{position:fixed;inset:0;z-index:300}
.guide-hole{
  position:absolute;border-radius:12px;pointer-events:none;
  box-shadow:0 0 0 9999px rgba(3,7,18,.62),0 0 0 2px var(--accent) inset;
  transition:left .3s cubic-bezier(.4,0,.2,1),top .3s cubic-bezier(.4,0,.2,1),
             width .3s cubic-bezier(.4,0,.2,1),height .3s cubic-bezier(.4,0,.2,1);
}
.guide-tip{
  position:absolute;width:308px;padding:14px 15px;
  background:var(--panel);border:1px solid var(--accent);border-radius:13px;
  box-shadow:var(--shadow);
  transition:left .3s cubic-bezier(.4,0,.2,1),top .3s cubic-bezier(.4,0,.2,1);
}
.guide-tip h3{font-size:14.5px;font-weight:700;margin-bottom:7px;color:var(--accent)}
.guide-tip p{font-size:12.5px;line-height:1.65;color:var(--text)}
.guide-tip kbd{
  background:var(--panel2);border:1px solid var(--line2);border-radius:4px;
  padding:0 5px;font-size:11px;font-family:inherit;color:var(--muted);
}
.guide-actions{display:flex;align-items:center;gap:7px;margin-top:13px}
.guide-actions #guide-step{flex:1;font-size:11px;color:var(--muted2)}

/* 窄屏 */
@media (max-width:1180px){
  .app{grid-template-columns:244px 1fr}
  .detail{position:absolute;right:0;top:62px;height:calc(100vh - 62px);z-index:40;box-shadow:var(--shadow);width:min(392px,92vw)}
  .splitter{display:none}
}
@media (max-width:760px){
  .brand-text{display:none}
  .brand{min-width:auto}
  .topbar{gap:10px;padding:0 12px}
  #btn-menu{display:block}
  .search-wrap{max-width:none}
  .top-actions .btn:not(#btn-theme):not(#btn-help){display:none}
  .app{grid-template-columns:1fr}
  .sidebar{
    position:absolute;left:0;top:62px;height:calc(100vh - 62px);
    width:min(300px,84vw);z-index:45;box-shadow:var(--shadow);
    transform:translateX(0);transition:transform .22s ease;
  }
  .sidebar.collapsed{display:none}
  .sidebar.collapsed+.scrim{display:none}
  .scrim.show{display:block}
  .detail{width:100vw;left:0;right:0;top:62px;height:calc(100vh - 62px)}
  .plan-drawer{width:100vw;top:62px;height:calc(100vh - 62px)}
  .plan-drawer.wide{width:100vw}
  .hud{right:12px;bottom:96px}
  .hint{display:none}
  .minimap{display:none}
  .ct-row,.ct-head{grid-template-columns:1fr 1fr;row-gap:2px}
  .ct-c3{grid-column:1 / -1}
  .ct-c5{grid-column:1 / -1}
  .bk-item{gap:7px;padding:7px 8px}
}