:root{--bg:#f5f7fa;--surface:#fff;--sub:#f8fafc;--ink:#172033;--mute:#526071;--faint:#647083;--line:#dce2ea;--line2:#e8edf3;--line3:#c8d0dc;--brand:#356fe5;--brand-h:#285fcf;--brand-soft:#edf3ff;--btn:#0069ee;--ok:#1f8a62;--ok-soft:#e9f7f1;--warn:#b46a0c;--warn-soft:#fff5e5;--bad:#c33a32;--bad-soft:#fff0ee;--side:232px;--tabh:64px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Noto Sans SC",sans-serif;overflow-x:hidden}
a{color:inherit;text-decoration:none}
button,select,input,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid #9bbcff;outline-offset:2px}
.sheet-only{display:none}
#side{position:fixed;left:8px;top:8px;bottom:8px;width:212px;background:var(--surface);border-radius:20px;padding:12px 10px 16px;overflow-y:auto;z-index:20;box-shadow:0 1px 2px #1924350d,0 8px 24px #1924350d}
.side-head{display:flex;align-items:center;justify-content:space-between;padding:2px 4px 10px}
.brand{display:flex;align-items:center;gap:8px;min-height:44px}
.brand b{font-size:19px;white-space:nowrap}
.brand small{font-size:12px;font-weight:700;color:var(--faint);margin-top:4px;white-space:nowrap}
.icon-btn{width:44px;height:44px;border:0;background:none;border-radius:10px;font-size:20px;color:var(--faint)}
.icon-btn:hover{background:var(--sub)}
.nav{display:grid;gap:2px}
.nav a{display:flex;align-items:center;gap:10px;min-height:44px;padding:0 12px;border-radius:10px;color:var(--mute);font-size:15px}
.nav a i{font-style:normal;width:18px;text-align:center;font-size:17px}
.nav a:hover{background:var(--sub)}
.nav a.on{background:#dbe9fc;color:#0a58c9}
.seg-row{display:flex;flex-wrap:wrap;align-items:center;gap:6px 8px;margin:12px 0 6px;padding-top:12px;border-top:1px solid var(--line2);font-size:13px;color:var(--mute)}
.seg{display:flex;background:#f1f4f9;border-radius:99px;padding:3px;flex:1}
.seg button{flex:1;min-height:44px;border:0;background:none;border-radius:99px;font-size:12.5px;color:var(--mute)}
.seg button[aria-checked=true]{background:var(--btn);color:#fff}
.t-head{margin:14px 6px 2px;font-size:13px;color:var(--faint);font-weight:700}
.t-gw{margin-top:2px}
.t-g{display:flex;align-items:center;justify-content:space-between;gap:6px;width:100%;min-height:44px;border:0;background:none;padding:0 6px;font-size:16px;font-weight:700;text-align:left;border-radius:8px}
.t-g .chev{transition:transform .15s;color:var(--faint);font-size:13px}
.t-gw.closed .chev{transform:rotate(-90deg)}
.t-gw.closed .t-list{display:none}
.t-g:hover{background:var(--sub)}
.t-list{margin:0 0 6px 8px;padding-left:8px;border-left:1px solid var(--line2);display:grid}
.t-list a{display:flex;align-items:center;gap:6px;min-height:44px;font-size:14.5px;padding:4px 6px;border-radius:8px;line-height:1.3}
.t-list a .l{font-weight:700;overflow-wrap:anywhere}
.t-list a .n{font-weight:400;color:var(--faint);font-size:12px;white-space:nowrap}
.t-list a .cnt{margin-left:auto;font-weight:400;font-size:12px;color:var(--faint);white-space:nowrap}
.t-list a:hover{background:var(--sub)}
.t-list a.on,.t-g.on{background:var(--brand-soft);color:var(--brand-h)}
.t-list .sub a{padding-left:14px;font-size:13.5px}
.t-list .sub a .l{font-weight:400}
body.collapsed #side{display:none}
body.collapsed #main{margin-left:0}
#main{margin-left:var(--side);padding:12px 20px 40px;min-height:100vh}
.topbar{display:flex;align-items:center;gap:10px;min-height:56px}
.expand-btn{display:none;width:44px;height:44px;border:0;border-radius:12px;background:var(--surface)}
body.collapsed .expand-btn{display:inline-block}
.meta-line{display:flex;justify-content:space-between;color:var(--mute);font-size:14px;margin:6px 0 12px}
.pill-in{display:flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:99px;padding:0 16px;min-height:44px;flex:1;max-width:520px}
.pill-in input{border:0;outline:0;background:none;font-size:16px;flex:1;min-width:0;min-height:44px}
.pill-in:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px #356fe533}
.cards2{display:grid;grid-template-columns:1.1fr 1fr;gap:16px}
.panel{background:var(--surface);border-radius:28px;padding:20px 22px;box-shadow:0 1px 2px #1924350d,0 8px 24px #1924350d;margin-bottom:16px}
.panel h2{margin:0 0 10px;font-size:22px}
.panel p{margin:0 0 14px;color:var(--mute)}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;min-width:44px;padding:0 22px;border:0;border-radius:10px;background:var(--btn);color:#fff;font-size:16px}
.btn.block{width:100%;min-height:48px}
.btn:hover{background:var(--brand-h)}
.btn.ghost{background:var(--surface);color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{background:var(--sub)}
.stat3{display:grid;grid-template-columns:repeat(3,1fr)}
.stat3 div{padding:4px 14px;border-left:1px solid var(--line2)}
.stat3 div:first-child{border-left:0;padding-left:0}
.stat3 small{display:block;color:var(--mute);font-size:13px;font-weight:700}
.stat3 b{font-size:26px}
.stat3 .u b{color:var(--warn)}.stat3 .m b{color:var(--ok)}
.sec-title{margin:18px 2px 10px;font-size:18px;font-weight:700;display:flex;justify-content:space-between;align-items:baseline}
.sec-title small{font-weight:400;color:var(--faint);font-size:13px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px}
.cc{display:block;background:var(--surface);border:1px solid var(--line2);border-radius:22px;padding:14px 16px;min-height:76px;overflow-wrap:anywhere}
.cc:hover{border-color:var(--brand)}
.cc b{display:block;font-size:15.5px;line-height:1.35}
.cc small{color:var(--faint);font-size:12.5px}
.bar{height:5px;background:#e5e9f0;border-radius:9px;overflow:hidden;margin-top:8px}
.bar i{display:block;height:100%;background:var(--ok);border-radius:9px}
.empty{text-align:center;color:var(--mute);padding:48px 12px;white-space:pre-wrap;background:var(--surface);border-radius:28px;border:1px dashed var(--line3)}
.p-top{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:12px;background:#fff;margin:-12px -20px 12px;padding:0 20px;min-height:60px;border-bottom:1px solid var(--line2)}
.p-top h1{margin:0;font-size:20px;font-weight:500;display:flex;align-items:center;gap:8px;min-width:0}
.p-top h1 span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.p-top h1 small{font-size:12.5px;color:var(--mute);font-weight:400;white-space:nowrap}
.p-top .sp{flex:1}
.pill{min-height:44px;padding:0 16px;border-radius:99px;border:1px solid var(--line);background:#f4f6fa;font-size:13px;font-weight:700;color:var(--mute)}
.pill[disabled]{opacity:.45;cursor:default}
.back{width:44px;height:44px;border:0;background:none;font-size:22px;border-radius:12px;color:var(--mute);display:grid;place-items:center}
.stats-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:10px}
.stats-row span{background:#fff;border:1px solid var(--line2);border-radius:99px;padding:4px 14px;font-size:13px;color:var(--mute);min-height:30px;display:inline-flex;align-items:center;gap:6px}
.stats-row b{font-size:16px;color:var(--ink)}
.stats-row .u b{color:var(--warn)}.stats-row .m b{color:var(--ok)}
.tools{display:flex;gap:10px;align-items:center;margin-bottom:10px;flex-wrap:wrap}
.facets{display:grid;grid-template-columns:minmax(0,1fr);gap:6px;margin-bottom:12px}
.facet{min-width:0;display:flex;gap:8px;align-items:center}
.facet>b{flex:none;font-size:13px;color:var(--faint);min-width:3.2em}
.chips{min-width:0;flex:1;display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;padding:2px 0}
.chips button{flex:none;min-height:44px;padding:0 14px;border-radius:99px;border:1px solid var(--line);background:var(--surface);font-size:14px}
.chips button.on{background:var(--brand);color:#fff;border-color:var(--brand)}
.chips button small{opacity:.7;margin-left:4px}
.q-list{display:grid;grid-template-columns:minmax(0,1fr);gap:12px;min-width:0}
.qc{background:var(--surface);border:1px solid var(--line3);border-radius:32px;padding:20px;min-width:0;overflow:hidden}
.qc.done{border-color:#9ad8bd}
.q-head{display:flex;align-items:center;gap:8px;padding-bottom:12px;border-bottom:1px solid var(--line2);flex-wrap:wrap}
.num{min-width:34px;height:34px;border-radius:99px;background:#f1f4f9;display:grid;place-items:center;font-weight:700;color:var(--mute);font-size:15px;padding:0 6px}
.chip{background:#f4f6fa;border-radius:99px;padding:6px 12px;font-size:13px;color:var(--mute);max-width:100%;overflow-wrap:anywhere;line-height:1.35}
.chip.src{font-weight:700;color:var(--ink)}
.chip.ty{background:var(--brand-soft);color:var(--brand-h)}
.chip.st-m{background:var(--ok-soft);color:var(--ok)}.chip.st-s,.chip.pr{background:var(--warn-soft);color:var(--warn)}.chip.st-n{background:var(--bad-soft);color:var(--bad)}
.chip.fav{background:var(--warn-soft);color:var(--warn)}
.tagrow{display:flex;flex-wrap:wrap;gap:6px;padding:10px 0 0}
.tagrow .chip.kp{background:#eaf6f3;color:#17695a}.tagrow .chip.ec{background:var(--bad-soft);color:#922b25}
.secbox{padding-top:12px}
.lab{display:inline-flex;font-size:14px;font-weight:700;margin-bottom:4px;color:var(--brand-h)}
.txt{white-space:pre-wrap;overflow-wrap:anywhere;font-size:18px;line-height:1.75;min-width:0}
.opts{list-style:none;margin:10px 0 0;padding:0;display:grid;gap:6px}
.opts li{white-space:pre-wrap;overflow-wrap:anywhere;background:var(--sub);border:1px solid var(--line2);border-radius:14px;padding:8px 12px;font-size:17px}
.imgs img{display:block;max-width:100%;height:auto;margin-top:10px;border:1px solid var(--line2);border-radius:12px;background:#fff}
.broken{color:var(--bad);background:var(--bad-soft);border-radius:10px;padding:8px 12px;margin-top:8px;font-size:14px}
.q-act{display:grid;gap:8px;margin-top:12px;padding-top:10px;border-top:1px solid var(--line2)}
.r1,.r2{display:flex;flex-wrap:wrap;gap:6px}
.act{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;min-width:44px;padding:0 14px;border-radius:99px;font-size:14px;white-space:nowrap}
.tg{border:0;background:none}
.tg:hover{background:var(--sub)}
.tg[aria-expanded=true]{background:#e8f1ff;color:#0a58c9}
.tg.s[aria-expanded=true]{background:#eef0fb;color:#3b46a8}
.tg.p[aria-expanded=true]{background:var(--warn-soft);color:var(--warn)}
.tg.k[aria-expanded=true]{background:var(--ok-soft);color:var(--ok)}
.sb{border:1px solid var(--line);background:#fff;color:var(--mute);font-weight:700;border-radius:10px;flex:1 1 0}
.sb:hover{background:var(--sub)}
.sb[aria-pressed=true].f{background:var(--warn-soft);border-color:#e0a84a;color:var(--warn)}
.sb[aria-pressed=true].s{background:var(--warn-soft);border-color:var(--warn);color:#814700}
.sb[aria-pressed=true].n{background:var(--bad-soft);border-color:var(--bad);color:#922b25}
.sb[aria-pressed=true].m{background:var(--ok-soft);border-color:var(--ok);color:#166446}
.ans-sec{margin-top:12px;border-radius:18px;padding:12px 16px 14px;border:1px solid transparent;border-left-width:6px}
.ans-sec[hidden]{display:none}
.ans-sec.a{background:#eef4ff;border-color:#c9dbfb;border-left-color:var(--brand)}
.ans-sec.s{background:#f3f4fc;border-color:#d7dbf3;border-left-color:#5a66d6}.ans-sec.s .lab{color:#3b46a8}
.ans-sec.p{background:var(--warn-soft);border-color:#f2d8ad;border-left-color:#e08a1e}.ans-sec.p .lab{color:var(--warn)}
.ans-sec.k{background:var(--ok-soft);border-color:#bde5d3;border-left-color:var(--ok)}.ans-sec.k .lab{color:var(--ok)}
.ans-sec.note{background:#fff;border:1px solid var(--line);border-left:6px solid var(--faint)}
.ans-sec.note textarea{width:100%;min-height:96px;border:1px solid var(--line);border-radius:10px;padding:8px 10px;font-size:16px;resize:vertical;background:var(--sub)}
.warnflag{background:var(--bad-soft);color:var(--bad);border-radius:10px;padding:6px 12px;font-size:13px;margin-top:8px}
#more{display:block;margin:16px auto 8px;min-width:160px}
#banner{background:var(--bad-soft);border:1px solid #f0b8b3;color:var(--bad);border-radius:16px;padding:12px 16px;margin-bottom:12px;font-size:14px}
#banner ul{margin:6px 0 0;padding-left:20px}
#sheetx{position:fixed;inset:0;background:#141e2d66;z-index:70;display:grid;place-items:center;padding:16px}
#sheetx .box{background:#fff;border-radius:16px;padding:18px;max-width:420px;width:100%}
.katex{font-size:1.12em}
.katex-display{margin:.6em 0;max-width:100%;overflow-x:auto;overflow-y:hidden;padding:2px 0}
.tabbar{display:none}
@media(max-width:1023px){
  :root{--side:0px}
  #main{margin-left:0;padding:8px 12px calc(var(--tabh) + 24px)}
  .desk-only{display:none!important}
  .sheet-only{display:block}
  .icon-btn.sheet-only{display:grid;place-items:center}
  #side{inset:0;width:auto;border-radius:0;transform:translateY(100%);visibility:hidden;transition:transform .2s;padding:14px 16px calc(var(--tabh) + 16px);z-index:40;box-shadow:none}
  body.sheet #side{transform:none;visibility:visible}
  .sheet-sub{margin:0 0 8px;color:var(--mute);font-size:14px}
  .nav{display:none}
  .seg-row{margin-top:4px}
  .cards2{grid-template-columns:1fr}
  .panel{border-radius:24px;padding:18px}
  .p-top{margin:-8px -12px 10px;padding:0 8px;gap:6px}
  .p-top h1{font-size:18px}
  .p-top .pill{display:none}
  .qc{border-radius:28px;padding:16px}
  .txt{font-size:17px}
  .r1{display:grid;grid-template-columns:repeat(3,1fr)}
  .r1 .act{padding:0 4px;font-size:13.5px}
  .r2{display:grid;grid-template-columns:repeat(3,1fr)}
  .tabbar{display:flex;position:fixed;left:0;right:0;bottom:0;height:var(--tabh);padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--line2);z-index:50}
  .tabbar>*{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;border:0;background:none;font-size:12px;color:var(--mute);min-height:44px;min-width:44px}
  .tabbar i{font-style:normal;font-size:19px;line-height:1.1;padding:2px 14px;border-radius:99px}
  .tabbar .on i{background:#dbe9fc;color:#0a58c9}
  .tabbar .on{color:#0a58c9;font-weight:700}
  .stat3 b{font-size:22px}
  .stat3 div{padding:4px 8px}
}

.rel{border:1px solid var(--line2);border-radius:18px;padding:12px 14px;margin:8px 0;background:#fff}
.rel-src{font-weight:700;color:var(--ink,#172033);margin-bottom:4px}
.rel-note{color:#5b6678;font-size:14px;margin-bottom:6px}
.rel-btn{min-height:44px;margin-top:8px;padding:0 16px;border:1px solid var(--line2);border-radius:22px;background:#f5f8ff;color:#356fe5;font-weight:600}
.rel-sol{margin-top:8px;padding-top:8px;border-top:1px dashed var(--line2)}

.dir{padding:0;overflow:hidden}.dir-h{padding:14px 16px 8px}.dir-h h2{margin:0}.dir-h small{color:#6b7280;font-size:12px}
.dir-b{display:flex;align-items:center;gap:8px;width:100%;min-height:48px;padding:0 16px;background:none;border:0;border-top:1px solid #e5e7eb;font:inherit;text-align:left;cursor:pointer}
.dir-b .dn{flex:1;font-weight:600}.dir-b .dc,.dir-a .dc{color:#6b7280;font-size:13px;white-space:nowrap}.dir-b .chev{transition:transform .15s}.dir-g.open .chev{transform:rotate(180deg)}
.dir-l{background:#f8fafc}.dir-a{display:flex;justify-content:space-between;align-items:center;gap:8px;min-height:44px;padding:0 16px 0 28px;border-top:1px solid #eef0f3;color:inherit;text-decoration:none}
.dir-sub{padding:10px 16px 4px;font-size:12px;color:#6b7280;background:#f1f5f9;border-top:1px solid #e5e7eb}
.ans-sec.d .txt{line-height:1.85}

/* 平板：竖屏和窄横屏沿用底部标签栏，内容居中并放大，首页两列 */
.seg-row>span{flex:0 0 100%}
@media(min-width:600px) and (max-width:1023px){
  #main{padding:12px max(28px,calc((100vw - 840px)/2)) calc(var(--tabh) + 28px)}
  .cards2{grid-template-columns:1.1fr 1fr;gap:16px}
  .panel{padding:22px 26px}
  .qc{padding:24px 28px}
  .txt{font-size:19px}
  .p-top h1{font-size:20px}
  .p-top .pill{display:flex}
  .r1 .act,.r2 .act{font-size:14px}
  .panel.dir{padding:0}
  .dir-b,.dir-a{min-height:52px}
  .dir-b .dn{font-size:17px}
  .tabbar>*{font-size:13px}
  .tabbar i{font-size:21px}
  .seg-row>span{flex:0 0 auto}
}

/* ---------- knowledge graph ---------- */
.gv{max-width:1100px;margin:0 auto;padding:12px 14px 20px}
.g-top{display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;margin-bottom:6px}
.g-title{margin:0;font-size:20px}
.lg-note .lg-q,.lg-note .lg-h{vertical-align:-2px}.lg-note .lg-q{width:11px;height:11px}.lg-note .lg-h{width:10px;height:10px;margin:0 3px}
.g-tabs{display:flex;gap:6px;background:#eef1f6;border-radius:99px;padding:3px}
.g-tabs.sp{margin-left:auto}
.g-tab{min-height:44px;min-width:44px;padding:0 16px;display:inline-flex;align-items:center;justify-content:center;border-radius:99px;color:var(--mute);font-weight:600;text-decoration:none;font-size:15px}
.g-tab.on{background:#fff;color:#0a58c9;box-shadow:0 1px 3px rgba(0,0,0,.12)}
.g-legend{background:#fff;border:1px solid var(--line2);border-radius:14px;padding:6px 10px;margin-bottom:8px}
.lg-row{display:flex;flex-wrap:wrap;align-items:center;gap:6px 8px;margin:2px 0}
.lg-row>b{font-size:13px;color:var(--mute);min-width:30px}
.lg-chip{min-height:40px;display:inline-flex;align-items:center;gap:5px;padding:0 10px;border-radius:99px;border:1px solid var(--line2);background:#f8fafc;color:#94a3b8;font-size:14px;cursor:pointer}
.lg-chip.on{background:#fff;color:#1f2937;border-color:#94a3b8;font-weight:600}
.lg-line{display:inline-block;width:20px;height:4px;border-radius:2px;opacity:.45}
.lg-chip.on .lg-line{opacity:1}
.lg-dot{width:12px;height:12px;border-radius:50%;display:inline-block}
.lg-star{color:#eab308;font-size:16px}
.lg-shape{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:#334155;min-height:28px}
.lg-q{width:14px;height:14px;border-radius:50%;background:#dc2626;display:inline-block}
.lg-h{width:12px;height:12px;background:#334155;transform:rotate(45deg);display:inline-block;margin:0 2px}
.lg-note{font-size:12px;color:var(--mute);margin-top:2px}
.g-box{position:relative;background:#fff;border:1px solid var(--line2);border-radius:14px;overflow:hidden}
.g-svg{display:block;width:100%;height:min(60vh,620px);touch-action:none;background:#fbfcfe;cursor:grab}
.g-n{cursor:pointer}
.g-n:focus{outline:none}.g-n:focus-visible circle,.g-n:focus-visible rect{stroke:#0a58c9;stroke-width:4}
.g-lab{fill:#1f2937;paint-order:stroke;stroke:#fff;stroke-width:3px;stroke-linejoin:round;pointer-events:none;font-weight:600}
.g-n.hub .g-lab{fill:#334155;font-weight:700}
.g-star{fill:#eab308;paint-order:stroke;stroke:#fff;stroke-width:2px;pointer-events:none}
.g-e{cursor:pointer}
.g-zoom{position:absolute;right:8px;bottom:8px;display:flex;flex-direction:column;gap:6px}
.g-zb{min-width:44px;min-height:44px;border-radius:12px;border:1px solid var(--line2);background:#fff;font-size:15px;font-weight:700;color:#334155;box-shadow:0 1px 4px rgba(0,0,0,.12);cursor:pointer}
.g-sel{margin:8px 0;padding:10px 12px;background:#f1f5f9;border-radius:12px;font-size:15px;line-height:1.6;min-height:44px}
.g-rtype{display:inline-block;color:#fff;font-size:12px;font-weight:700;padding:1px 8px;border-radius:99px;vertical-align:1px}
.g-lists{display:grid;gap:10px;grid-template-columns:1fr}
.g-card{background:#fff;border:1px solid var(--line2);border-radius:14px;padding:12px 14px}
.g-card h3{margin:0 0 6px;font-size:17px}
.g-card .muted,.muted{color:var(--mute);font-size:13px}
.g-acts{display:flex;gap:8px;margin:6px 0 4px;flex-wrap:wrap}
.g-btn{min-height:44px;display:inline-flex;align-items:center;padding:0 16px;border-radius:12px;background:#0a58c9;color:#fff;text-decoration:none;font-weight:700}
.g-btn.ghost{background:#fff;color:#0a58c9;border:1px solid #0a58c9}
.g-nb,.g-top10{margin:6px 0 0;padding-left:20px;line-height:1.9;font-size:15px}
.g-link{color:#0a58c9;font-weight:700;text-decoration:none;display:inline-block;min-height:28px}
.g-mini{display:inline-flex;align-items:center;min-height:36px;padding:0 10px;border-radius:99px;border:1px solid #bcd0f0;color:#0a58c9;font-size:13px;text-decoration:none}
.g-iso{line-height:2.2}
.g-empty{background:#fff;border:1px dashed #94a3b8;border-radius:14px;padding:18px;line-height:1.7}
.q-act .gc{text-decoration:none;display:inline-flex;align-items:center;justify-content:center}
.rel.gl{line-height:1.8}
@media(min-width:600px) and (max-width:1023px){.g-svg{height:min(62vh,760px)}.g-sel,.g-nb,.g-top10{font-size:17px}}
@media(min-width:1024px){.g-lists{grid-template-columns:1fr 1fr}.g-svg{height:min(70vh,700px)}}
@media(max-width:1023px){.gv{padding-bottom:calc(var(--tabh) + 20px)}}

.g-isolab{font-size:12px;fill:#64748b}

.g-none{background:#f1f5f9;border-radius:10px;padding:10px 12px;font-size:14px}
@media(max-width:699px){
 .g-title{display:none}
 .g-top{margin-bottom:4px;flex-wrap:nowrap;justify-content:space-between}
 .g-tab{padding:0 10px;font-size:14px}
 .g-tabs.sp{margin-left:0}
 .g-legend{padding:4px 8px;margin-bottom:6px}
 .lg-row{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none}
 .lg-row::-webkit-scrollbar{display:none}
 .lg-chip{flex:0 0 auto;min-height:44px;padding:0 9px;font-size:13px}
 .lg-row>b{flex:0 0 auto;min-width:0}
 .lg-note{font-size:11px;line-height:1.35}
 .gv{padding:8px 10px 20px}
}

/* 知识点视图 */
.kp-ch .dir-h{flex-direction:column;align-items:flex-start;gap:6px}
.kp-chline{display:flex;flex-wrap:wrap;align-items:center;gap:10px;justify-content:space-between;width:100%}
.kp-rel{white-space:nowrap}
.kp-body{padding:4px 0 12px}
.kp-item{padding:10px 0;border-top:1px dashed var(--line,#e2e2e2)}
.kp-item:first-child{border-top:0}
.kp-item h3{font-size:15px;margin:0 0 6px;font-weight:600}
.kp-pts{margin:0;padding-left:1.2em;display:grid;gap:4px;font-size:14px;line-height:1.75}

/* 排版迭代v1：桌面阅读列限宽，长行收敛 */
@media(min-width:1024px){
  .q-list{max-width:940px}
}
.fbp select,.fbp textarea{width:100%;box-sizing:border-box;margin:6px 0;font:inherit;padding:8px;border:1px solid var(--line,#d5dbe3);border-radius:8px}
.fbp textarea{min-height:70px}
.chip.rd{background:#eef2f8}
a.chip{text-decoration:none}
.muted{color:#6b7684;font-size:.9em}
.sb[hidden]{display:none!important}
.t-kids{margin:2px 0 6px 18px;padding-left:8px;border-left:2px solid var(--line2)}
.t-kids a{font-size:13px}
@media(min-width:900px){:root{--side:292px}}
@media(min-width:900px){#side{width:272px}}
.kp.chip[role=button]{cursor:pointer}.kp.chip[role=button]:hover{background:var(--ok-soft)}
.kpcard-w{position:fixed;inset:0;z-index:80}.kpcard-bd{position:absolute;inset:0;background:#17203340}
.kpcard{position:absolute;background:var(--surface);box-shadow:0 12px 40px #17203355;padding:14px 16px 18px;overflow-y:auto;font-size:15px;line-height:1.5}
.kpcard-h{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.kpcard-h b{font-size:17px}
.kpcard-x{border:0;background:var(--sub);width:36px;height:36px;border-radius:18px;font-size:16px;cursor:pointer}
.kpcard-s{color:var(--mute);font-size:13px;margin:10px 0 6px}.kpcard-m{font-style:normal}
.kpcard-i{display:flex;justify-content:space-between;gap:8px;padding:9px 10px;border:1px solid var(--line2);border-radius:10px;margin-bottom:6px;color:var(--ink);text-decoration:none}
.kpcard-i .i2{color:var(--mute);white-space:nowrap}
.kpcard-k{background:var(--sub);border-radius:10px;padding:8px 10px;margin-bottom:6px;font-size:14px}
.kpcard-o{display:block;text-align:center;margin-top:12px;padding:10px;border-radius:12px;background:var(--btn);color:#fff;text-decoration:none;font-weight:600}
@media(min-width:900px){.kpcard{right:16px;top:72px;bottom:16px;width:380px;border-radius:18px}.kpcard-bd{background:transparent}}
@media(max-width:899px){.kpcard{left:0;right:0;bottom:0;max-height:72vh;border-radius:20px 20px 0 0}}
.kp-hl{outline:3px solid var(--brand);outline-offset:4px;border-radius:8px;background:var(--brand-soft)}.kp-back{display:inline-block;margin:0 0 10px}.kpcard-k .kp-pts{margin:6px 0 0 18px;padding:0}
.kpcard-n{font-size:12px;color:var(--faint);margin:2px 0 10px}.kpcard-t{width:100%;text-align:left;border:1px solid var(--line2);background:var(--sub);border-radius:10px;padding:10px;font-size:14px;margin-top:6px;cursor:pointer}
.g-sel.g-sim{text-align:left;max-height:46vh;overflow-y:auto;font-size:14px;line-height:1.5}
.g-sim-h{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:6px}
.g-sim-s{color:var(--mute);font-size:13px;margin-bottom:6px}.g-sim-n{color:var(--mute)}
.g-sim-i{border:1px solid var(--line2);border-radius:10px;padding:8px 10px;margin-bottom:6px;background:var(--surface)}
.g-sim-i summary{cursor:pointer}.g-sim-r{color:var(--brand-h);margin:4px 0}.g-sim-q,.g-sim-a{margin:4px 0;font-size:13.5px}
.g-sim-hl{background:var(--warn-soft)}

.g-sim-h{position:sticky;top:0;z-index:2;background:#f1f5f9;padding:2px 0 6px}
.g-sel.g-sim{padding-top:0}

.g-sn-e{opacity:.6}
.g-sn-e circle{stroke-dasharray:2 2}

.kp-src{display:flex;flex-wrap:wrap;gap:6px 10px;align-items:center;margin:4px 0 8px;font-size:.88rem;color:var(--muted,#667)}.kp-srcl{display:inline-block;padding:6px 12px;border:1px solid currentColor;border-radius:999px;text-decoration:none;min-height:32px;line-height:20px}.kp-un{margin:0 0 10px;font-size:.88rem}.kp-un summary{cursor:pointer;padding:6px 0;min-height:32px}
.g-lab2{font-weight:500;fill:#475569;font-size:.88em}
@media(max-width:600px){.lg-row{flex-wrap:wrap;overflow-x:visible;padding-right:0}}

/* ---- 3D 全景图谱 ---- */
.g3-box{margin:8px 0}
.g3{position:relative;border-radius:14px;overflow:hidden;background:#060a16;box-shadow:0 4px 18px rgba(6,10,22,.25)}
.g3-cv{display:block;width:100%;touch-action:none;cursor:grab}
.g3-cv:active{cursor:grabbing}
.g3-hint{position:absolute;left:10px;top:8px;font-size:11px;color:#9fb0cf;background:rgba(6,10,22,.55);padding:2px 8px;border-radius:8px;pointer-events:none}
.g3-tools{position:absolute;right:8px;top:8px;display:flex;gap:6px}
.g3-tools .g-zb{background:rgba(15,26,48,.82);color:#dbe4f0;border:1px solid #243b63}
.g3-tools .g-zb.on{background:#274a7c;color:#fff}
.g3-info{position:absolute;left:8px;right:8px;bottom:8px;background:rgba(10,17,34,.94);color:#dbe4f0;border:1px solid #243b63;border-radius:12px;padding:10px 12px;max-height:48%;overflow:auto}
.g3-i-h{display:flex;justify-content:space-between;gap:8px;align-items:flex-start;font-size:14px}
.g3-i-x{background:none;border:0;color:#8fa3b8;font-size:16px;cursor:pointer;padding:0 2px}
.g3-i-m{display:flex;flex-wrap:wrap;gap:6px;margin:6px 0}
.g3-chip{background:#33415c;color:#e6edf7;border-radius:999px;padding:1px 9px;font-size:11px}
.g3-fav{background:#5a4a00}
.g3-ch{background:#1e3a5f}
.g3-i-a{display:flex;gap:8px;margin:6px 0}
.g3-i-e{display:flex;flex-direction:column;gap:4px;margin-top:6px}
.g3-i-er{display:block;text-align:left;background:#0f1a30;border:1px solid #22355a;color:#c8d4ea;border-radius:8px;padding:6px 8px;font-size:12px;cursor:pointer}
.g3-i-more{font-size:11px;color:#7c8db0;padding:2px}
.g3-chips{display:flex;gap:6px;overflow-x:auto;padding:2px 1px;margin:4px 0;-webkit-overflow-scrolling:touch}
.g3-chips .lg-chip{flex:0 0 auto;white-space:nowrap}
.g-tab{white-space:nowrap}
.g3-hint{max-width:50%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
@media (max-width:1023px){.g3-info{bottom:64px}}
.g3-hint .h-s{display:none}
@media (max-width:520px){.g3-hint .h-l{display:none}.g3-hint .h-s{display:inline}.g3-hint{max-width:34%}}
.g3-info{overscroll-behavior:contain;-webkit-overflow-scrolling:touch}
/* papers 资料馆 */
.pp-note{margin:10px 0;color:#5b6472;font-size:13px;line-height:1.6}
.pp-warn{margin:10px 0;padding:10px 12px;border-radius:10px;background:#fff4e5;color:#8a5a00;font-size:13px;border:1px solid #ffd9a0}
.pp-years{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin:8px 0 18px}
.pp-ycard{display:block;padding:14px;border-radius:14px;background:#fff;border:1px solid #e3e8f0;text-decoration:none;color:inherit}
.pp-ycard b{font-size:20px;display:block}
.pp-ycard small{color:#8a93a3}
.pp-yst{display:block;margin-top:6px;font-size:12px;color:#5b6472;line-height:1.5}
.pp-mats{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:10px;margin:8px 0}
.pp-mcard{padding:14px;border-radius:14px;background:#fff;border:1px solid #e3e8f0}
.pp-mh{display:flex;justify-content:space-between;gap:8px;align-items:flex-start}
.pp-priv{flex:none;font-size:11px;color:#8a5a00;background:#fff4e5;border-radius:6px;padding:2px 6px}
.pp-mcard small{color:#8a93a3;display:block;margin-top:4px}
.pp-mst{font-size:12px;color:#5b6472;line-height:1.5;margin:8px 0 0}
.pp-q{margin:10px 0;padding:14px;border-radius:14px;background:#fff;border:1px solid #e3e8f0}
.pp-q.quar{background:#faf7f2;border-style:dashed}
.pp-qh{display:flex;align-items:center;gap:10px}
.pp-qh small{color:#8a93a3}
.pp-badge{font-size:11px;border-radius:6px;padding:2px 6px}
.pp-badge.warn{color:#8a5a00;background:#fff4e5}
.pp-badge.bad{color:#b42318;background:#fee4e2}
.pp-qreason{margin:8px 0 0;font-size:13px;color:#8a5a00;line-height:1.6}
.pp-stem{margin:10px 0;font-size:15px;line-height:1.8}
.pp-fig{max-width:100%;border-radius:8px;margin:6px 0}
.pp-figcap{display:block;color:#8a93a3;margin-bottom:6px}
.pp-opts{margin:6px 0;display:grid;gap:6px;font-size:14px}
.pp-tog{margin-top:8px}
.pp-body{margin-top:8px;border-top:1px dashed #e3e8f0;padding-top:8px}
.pp-ans{font-weight:600;margin:4px 0}
.pp-sol{font-size:14px;line-height:1.8;white-space:pre-wrap}
.pp-kp{font-size:13px;color:#5b6472;margin:6px 0}
.pp-status{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.pp-chip{font-size:11px;border-radius:6px;padding:2px 8px;background:#eef2f7;color:#42506b;cursor:help}
.pp-chip.warn{background:#fff4e5;color:#8a5a00}
.pp-src{margin-top:8px;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.pp-src small{color:#8a93a3}
.pp-src a{font-size:12px;color:#3b6fd4}
/* papers 单题+目录抽屉 */
.pp-navbar{display:flex;gap:8px;margin:10px 0}
.pp-navbar .btn{flex:1}
.pp-count{text-align:center;color:#8a93a3;font-size:13px;margin:4px 0 8px}
.pp-drawer{margin:0 0 10px;padding:12px;border-radius:14px;background:#fff;border:1px solid #e3e8f0}
.pp-dgrid{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}
.pp-dbtn{padding:9px 0;border-radius:10px;border:1px solid #e3e8f0;background:#f7f9fc;font-size:14px}
.pp-dbtn.warn{background:#fff4e5;border-color:#ffd9a0;color:#8a5a00}
.pp-dbtn.bad{background:#fee4e2;border-color:#f5b5b0;color:#b42318}
.pp-chip.ok{background:#e6f4ea;color:#137333}
.g3-q{flex:1;min-width:120px;padding:7px 12px;border-radius:999px;border:1px solid #d8dee8;font-size:13px;background:#fff}

/* 图谱节级子chip */
.g3-subs{margin-top:6px}
.lg-sub{min-height:34px;font-size:12.5px;padding:0 9px;background:#fff}
.lg-sub.on{background:#0b6bcb;color:#fff;border-color:#0b6bcb}

/* 知识卡原图裁片 */
.kp-img{display:block;max-width:220px;max-height:140px;border:1px solid var(--line2);border-radius:8px;margin-top:8px;cursor:zoom-in}
.kp-zoom{position:fixed;inset:0;background:rgba(0,0,0,.85);z-index:9999;display:flex;align-items:center;justify-content:center;cursor:zoom-out;padding:16px}
[hidden]{display:none!important}
.kp-zoom img{max-width:96%;max-height:96%;border-radius:8px;background:#fff;image-orientation:from-image}
.kp-img{image-orientation:from-image}
.kp-zoom-x{position:absolute;top:14px;right:16px;width:44px;height:44px;border-radius:50%;border:0;background:rgba(255,255,255,.92);color:#111;font-size:24px;line-height:1;cursor:pointer;z-index:10000}
.kp-ref{font-size:12px;color:#94a3b8;margin-top:4px}

/* 知识点库：一次一项，标题行可展开 */
.kp-it-h{cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:8px}
.kp-it-h::after{content:'▾';font-size:12px;color:var(--muted,#888);flex:none}
.kp-item.open > .kp-it-h::after{content:'▴'}
.kp-item-body{margin-top:6px}
.chips a{flex:none;min-height:44px;padding:11px 14px 0;border-radius:99px;border:1px solid var(--line);background:var(--surface);font-size:14px;text-decoration:none;color:inherit;display:inline-block;box-sizing:border-box}
.chips a.on{background:var(--brand);color:#fff;border-color:var(--brand)}
/* #10 复测即时反馈:四色卡框 + 伪对黄 chip + 过关标记 */
.qc.st-m{border:2px solid var(--ok);background:var(--ok-soft)}
.qc.st-s{border:2px solid var(--warn);background:var(--warn-soft)}
.qc.st-n{border:2px solid var(--bad);background:var(--bad-soft)}
.qc.st-f{border:2px solid #e0a84a;background:#fdf3e0}
.chip.st-f{background:#fdf0d3;color:#8a5a00}
.sb[aria-pressed=true].fk{background:#fdf0d3;border-color:#e0a84a;color:#8a5a00}
.qc.pass{opacity:.55;border-style:dashed}
.pass-tag{margin-top:10px;color:var(--ok);font-weight:700;font-size:13px}

.kp-imgbtn{border:0;background:none;padding:0;cursor:zoom-in;display:inline-block}
a.pp-saved{display:block;text-decoration:none;color:inherit;cursor:pointer;border-left:3px solid #4a6cf7;padding-left:8px}
a.pp-saved:hover{background:#f2f5ff}

/* === Issue #034 · 2026-10-26 · 双图谱合并修复单 === */
/* 进场/返回渐变 */
.gv{animation:gIn .28s ease}
@keyframes gIn{from{opacity:0}to{opacity:1}}
.g-box{transition:opacity .38s ease}
.g-box.g-fadeout{opacity:0;pointer-events:none}
/* 常驻工具条：搜索 + 分类 + 全屏（所有视图常驻） */
.g-toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:0 0 8px}
.g-q{flex:1;min-width:150px;padding:7px 12px;border:1px solid var(--line2);border-radius:999px;font-size:14px;background:#fff;outline:none}
.g-q:focus{border-color:#2563eb;box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.g-cat{max-width:240px;padding:7px 10px;border:1px solid var(--line2);border-radius:999px;font-size:13px;background:#fff;color:var(--ink)}
.g-fsbtn{white-space:nowrap}
/* 全屏兜底（无 Fullscreen API 时 fixed 铺满） */
.gv-fs{position:fixed;inset:0;z-index:80;background:#f5f7fb;overflow:auto;max-width:none;padding:14px}
.gv:fullscreen{background:#f5f7fb;overflow:auto;padding:14px}
.gv:fullscreen .g-svg{height:calc(100vh - 210px)!important}
.gv-fs .g-svg{height:calc(100vh - 210px)!important}
/* 画布内悬浮卡（点选详情） */
.g-pop{position:absolute;z-index:6;background:#fff;border:1px solid var(--line2);border-radius:14px;box-shadow:0 10px 30px rgba(15,23,42,.18);padding:10px 12px;animation:gIn .18s ease}
.g-pop-h{display:flex;align-items:flex-start;justify-content:space-between;gap:8px;font-size:14px;line-height:1.4}
.g-pop-x{flex:none;border:none;background:#eef2f7;border-radius:999px;width:24px;height:24px;line-height:1;font-size:15px;color:#475569;cursor:pointer}
.g-pop-x:hover{background:#e2e8f0}
.g-pop-m{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}
.g3-chip{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;color:#fff;background:#94a3b8}
.g3-chip.g3-fav{background:#fde047;color:#713f12}
.g3-chip.g3-ch{background:#e0e7ff;color:#3730a3}
.g-pop-a{display:flex;flex-wrap:wrap;gap:6px}
.g-pop-a .btn{padding:6px 12px;font-size:13px}

/* === Issue #012 · 2026-10-26 · 加载终态提示与大图旋转 === */
.more-done{text-align:center;color:var(--mute);font-size:13px;padding:10px 0 4px}
.kp-zoom-r{position:fixed;top:calc(env(safe-area-inset-top,0px) + 14px);right:64px;z-index:91;border:none;background:rgba(255,255,255,.92);border-radius:999px;padding:8px 14px;font-size:14px;cursor:pointer;box-shadow:0 2px 10px rgba(0,0,0,.25)}
.kp-zoom img{transition:transform .2s ease}

/* kpmove-261026: 多行碎片保留换行 */
.kp-pts li{white-space:pre-line}
/* kpmove-261026b: 标题含行内公式时不被 flex 拆散 */
.kp-it-h{display:block;position:relative;padding-right:22px}
.kp-it-h::after{position:absolute;right:2px;top:50%;transform:translateY(-50%)}

/* 3D 科技感: 提示条移到底部并在操作后淡出,避免与右上按钮重叠 */
.g3-hint{top:auto;bottom:10px;left:10px;max-width:calc(100% - 20px);transition:opacity .8s;border:1px solid rgba(80,140,220,.25)}
.g3-hint.fade{opacity:0}
.g3{box-shadow:0 0 0 1px rgba(60,110,200,.35),0 6px 28px rgba(30,70,160,.28)}
.g3-tools .g-zb{backdrop-filter:blur(6px);box-shadow:0 0 10px rgba(60,130,255,.25)}
/* 3D 手机首屏: 图例压成两行横滑,说明折叠,让画布进首屏 (yong 18:30) */
@media(max-width:699px){
 .g-legend .lg-row{flex-wrap:nowrap !important;overflow-x:auto !important;scrollbar-width:none}
 .g-legend .lg-row::-webkit-scrollbar{display:none}
 .g-legend .lg-chip{flex:0 0 auto !important;min-height:38px !important;font-size:13px !important;padding:0 9px !important}
 .g-legend .lg-note{display:none}
}

.g3{transition:opacity .35s}.g3.g3-fade{opacity:.15}

.dm-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:10px 0 6px}
.dm-b{border:1px solid #d5dbe5;background:#fff;color:#172033;border-radius:99px;padding:6px 12px;font:inherit;font-size:13px;cursor:pointer}
.dm-b.on{background:#eaf1ff;border-color:#0a66f5;color:#0a4fc4;font-weight:700}
.dm-b.dm-s.on{background:#fff4e0;border-color:#e8a317;color:#8a5a00}
.dm-b.dm-n.on{background:#fdecea;border-color:#e0584a;color:#b42318}
.dm-b.dm-f.on{background:#f3e9ff;border-color:#8b5cf6;color:#5b21b6}
.dm-b.dm-m.on{background:#e6f6ec;border-color:#2e9b57;color:#1e6b3b}
.dm-chip{font-size:12px;color:#6b7280;margin-left:4px}
.dm-chip.dm-c-s{color:#8a5a00}.dm-chip.dm-c-n{color:#b42318}.dm-chip.dm-c-f{color:#5b21b6}.dm-chip.dm-c-m{color:#1e6b3b}

.ds-box{margin:10px 0;padding:10px 12px;border-radius:14px;background:#f5f8ff;border:1px solid #dbe6ff}
.ds-note{display:block;color:#6b7280;font-size:12px;margin:4px 0 8px}
.ds-item{margin:8px 0;font-size:14px}
.ds-item a{font-weight:600}
.ds-tag{display:inline-block;margin-left:8px;padding:0 8px;border-radius:99px;font-size:12px;font-weight:600}
.ds-tag.ds-core{background:#e6f6ec;color:#1e6b3b}.ds-tag.ds-ext{background:#eef0f3;color:#4a5568}
.ds-why{color:#374151;font-size:13px;margin-top:2px}
.dg-note{margin:6px 12px;color:#6b7280;font-size:12px;line-height:1.5}
.dg-bar{display:flex;gap:6px;overflow-x:auto;padding:6px 12px;scrollbar-width:none}
.dg-chip{flex:none;border:1px solid #d5dbe6;background:#fff;border-radius:99px;padding:5px 12px;font-size:13px;color:#374151}
.dg-chip.on{background:#1f2937;color:#fff;border-color:#1f2937}
.dg-wrap{margin:0 12px;border-radius:16px;overflow:hidden;border:1px solid #e3e8f0}
.dg-cv{display:block}
.dg-info{margin:8px 12px;padding:0;font-size:14px}
.dg-info.on{padding:10px 12px;border-radius:14px;background:#f5f8ff;border:1px solid #dbe6ff}
.dg-h{display:flex;justify-content:space-between;gap:8px}.dg-lv{font-size:12px;color:#6b7280}
.dg-sub{color:#4b5563;font-size:13px;margin:4px 0}
.dg-sim{margin:8px 0}.dg-sim a{font-weight:600;color:#2563eb}
.dg-t{margin-left:8px;padding:0 8px;border-radius:99px;font-size:12px;font-weight:600}.dg-t.dg-core{background:#e6f6ec;color:#1e6b3b}.dg-t.dg-ext{background:#eef0f3;color:#4a5568}
.dg-why{color:#374151;font-size:13px}
.dg-open{display:inline-block;margin-top:6px;padding:6px 14px;border-radius:99px;background:#1f2937;color:#fff!important;font-size:13px}
.dg-legend{margin:4px 12px 16px;color:#6b7280;font-size:12px}
/* main graph 2D refine (2d2) */
.g-pill{fill:#fff;stroke:#334155;stroke-opacity:.9;pointer-events:none}
.g-n.hub .g-lab{stroke:none;paint-order:normal}
.g-chaps{display:flex;gap:6px;overflow-x:auto;padding:2px 0 8px;margin:0;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.g-chaps::-webkit-scrollbar{display:none}
.g-chap{flex:0 0 auto;border:1.5px solid #cbd5e1;background:#fff;color:#334155;border-radius:999px;padding:6px 12px;font-size:14px;line-height:1.2;cursor:pointer;min-height:34px}
.g-chap.on{background:#2563eb;border-color:#2563eb;color:#fff}
.g-cat{display:none}
.g-toolbar .g-q{flex:1}
/* round 2: richer 2D look */
.g-svg{background:radial-gradient(ellipse at 50% 38%,#ffffff 0%,#eef2fb 62%,#e3e9f6 100%)}
.g-svg{background-image:radial-gradient(circle,rgba(100,116,139,.16) 1px,transparent 1.4px),radial-gradient(ellipse at 50% 38%,#ffffff 0%,#eef2fb 62%,#e3e9f6 100%);background-size:22px 22px,100% 100%}
.g-n .g-halo{pointer-events:none}.g-n .g-glow{pointer-events:none}
.gd-0 .g-e line:not(.hit){stroke-opacity:.3!important}
.gd-1 .g-e line:not(.hit){stroke-opacity:.6!important}
.g-dens{display:flex;align-items:center;gap:6px;margin:0 0 8px;font-size:14px;color:#475569}
.g-dbtn{border:1.5px solid #cbd5e1;background:#fff;color:#334155;border-radius:999px;padding:5px 14px;font-size:14px;min-height:32px;cursor:pointer}
.g-dbtn.on{background:#1e293b;border-color:#1e293b;color:#fff}
.g-pill{fill:#fff;stroke:#4f46e5;stroke-opacity:.85;filter:drop-shadow(0 1px 2px rgba(15,23,42,.25))}
.g-n.hub .g-lab{fill:#312e81;font-weight:700}
.g-n.q .g-lab{fill:#334155}
/* dati knowledge-point entry (shows after a mastery mark) */
.dm-kp{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin:8px 0 2px}
.dm-kp-l{font-size:13px;color:#64748b;margin-right:2px}
.dm-kp-b{border:1.5px solid #bfdbfe;background:#eff6ff;color:#1d4ed8;border-radius:999px;padding:6px 12px;font-size:14px;min-height:34px;cursor:pointer}
.dm-kp-b:active{background:#dbeafe}
.dm-b.dm-rd{border-style:dashed;color:#8a5a00;border-color:#e8a317;background:#fffaf0}
/* 大题完成表 */
.db-box{margin:8px 0}.db-sum{font-size:13px;margin:6px 0}.db-bars{margin:6px 0}.db-bar{display:flex;align-items:center;gap:8px;font-size:12px;margin:3px 0}.db-bl{width:150px;flex:none}.db-tr{flex:1;height:8px;background:#e6eaf0;border-radius:4px;overflow:hidden;display:flex}.db-f1{background:#2e9b57;display:block}.db-f2{background:#e8a317;display:block}
.db-tbl{margin-top:8px}.db-r{display:grid;grid-template-columns:38px repeat(9,minmax(0,1fr)) 36px;gap:3px;margin-bottom:3px;align-items:stretch}.db-y{font-size:12px;font-weight:700;align-self:center}.db-hc{font-size:10px;text-align:center;color:#667}.db-p{font-size:11px;align-self:center;text-align:right;color:#445}
.db-c{position:relative;display:flex;align-items:center;justify-content:center;min-height:34px;border-radius:6px;text-decoration:none;color:#172033;border:1px solid transparent;user-select:none;-webkit-user-select:none}.db-c b{font-size:14px}.db-e{background:transparent}
.db-u{background:#eceff3;color:#8a94a6}.db-m{background:#bfe6cd;border-color:#2e9b57}.db-s{background:#ffe9b8;border-color:#e8a317}.db-f{background:#ffd2a6;border-color:#e07a1f}.db-n{background:#f7b9b2;border-color:#e0584a}.db-x{opacity:.25}
.db-star{position:absolute;left:1px;top:-1px;font-size:9px;font-style:normal;color:#b88400}.db-rd{position:absolute;right:2px;bottom:0;font-size:9px;color:#334}.db-mb{position:absolute;right:1px;top:-2px;font-size:11px;line-height:12px;padding:0 2px;color:#556;cursor:pointer}
.db-strip{position:sticky;bottom:0;background:#fff;border:1px solid #cfd6e2;border-radius:10px;padding:8px 10px;margin-top:10px;box-shadow:0 -2px 10px rgba(0,0,0,.08)}.db-st{font-size:13px;font-weight:700}
@media(max-width:480px){.db-r{grid-template-columns:30px repeat(9,minmax(0,1fr)) 30px;gap:2px}.db-hc{font-size:8px}.db-bl{width:110px}}
.db-gl{position:absolute;inset:0;border-radius:6px;pointer-events:none;opacity:0;background:#fff}
.db-u .db-gl{background:#8fa6c4;box-shadow:0 0 10px 2px rgba(110,140,185,.65)}
.db-m .db-gl{background:#2e9b57;box-shadow:0 0 12px 3px rgba(46,155,87,.7)}.db-s .db-gl{background:#e8a317;box-shadow:0 0 12px 3px rgba(232,163,23,.7)}.db-f .db-gl{background:#e07a1f;box-shadow:0 0 12px 3px rgba(224,122,31,.7)}.db-n .db-gl{background:#e0584a;box-shadow:0 0 12px 3px rgba(224,88,74,.7)}
.db-c b{position:relative;z-index:1}.db-p{display:inline-block}
.db-tw{position:absolute;inset:0;border-radius:6px;pointer-events:none;opacity:0;background:#fff}.db-u .db-tw{background:#9db4d3}

.dm-history{display:block;color:#64748b;font-size:12px;line-height:1.65;margin:5px 0;overflow-wrap:anywhere}.db-hcount{position:absolute;right:1px;bottom:0;font-size:8px;line-height:10px;color:#334155}

/* Long solution equations remain horizontally readable on narrow screens. */
.pp-sol{min-width:0;max-width:100%}.pp-sol .katex-display{display:block;max-width:100%;overflow-x:auto;overflow-y:visible;padding:4px 0;text-align:left}.pp-sol .katex-display>.katex{display:block;width:max-content;min-width:100%;text-align:left}

.ds-xcard{padding:10px 12px;margin:10px 0;border:1px solid #dbe6ff;border-radius:12px;background:#fff}.ds-xcard-head{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-bottom:6px}.ds-xcard .ds-stem-body{margin:8px 0}