:root{
  --brand:#5b2a86; --brand2:#7c3aed; --brand-soft:#f3edfa; --accent:#c79a3a;
  --ink:#1a1d29; --ink2:#384055; --muted:#6b7280; --line:#e7e9f0; --line2:#eef0f6;
  --paper:#f6f7fb; --card:#ffffff; --card2:#fbfaff;
  --c-yaodian:#2563eb; --c-hongqi:#dc2626; --c-zhaiyao:#0d9488;
  --c-siwei:#d97706; --c-yicuo:#ea580c; --c-zhengce:#7c3aed;
  --cash:#2563eb; --ret:#0d9488; --legal:#7c3aed; --support:#ea580c;
  --shadow:0 1px 3px rgba(20,22,40,.06),0 8px 24px rgba(20,22,40,.06);
  --radius:14px;
}
html[data-theme="dark"]{
  --brand:#b794f4; --brand2:#9f7aea; --brand-soft:#2a2240; --accent:#e0b85a;
  --ink:#e8eaf2; --ink2:#c2c7d6; --muted:#9aa0b0; --line:#2c3140; --line2:#262b38;
  --paper:#13151d; --card:#1b1e28; --card2:#20232f;
  --shadow:0 1px 3px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.3);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  background:var(--paper); color:var(--ink); line-height:1.75; font-size:15.5px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand2);text-decoration:none}
/* ---------- top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:50; display:flex;align-items:center;gap:16px;
  padding:11px 22px; background:linear-gradient(100deg,var(--brand),var(--brand2));
  color:#fff; box-shadow:0 2px 16px rgba(91,42,134,.25);
}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:.3px}
.brand .logo{width:34px;height:34px;border-radius:9px;background:rgba(255,255,255,.16);
  display:grid;place-items:center;font-size:17px;border:1px solid rgba(255,255,255,.25)}
.brand small{display:block;font-weight:500;opacity:.85;font-size:11.5px;letter-spacing:0}
.topbar .spacer{flex:1}
.prog-wrap{display:flex;align-items:center;gap:10px;font-size:12.5px;opacity:.95}
.prog-bar{width:140px;height:7px;border-radius:6px;background:rgba(255,255,255,.25);overflow:hidden}
.prog-bar > i{display:block;height:100%;width:0;background:#fff;border-radius:6px;transition:width .5s}
.tbtn{cursor:pointer;border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.1);
  color:#fff;border-radius:9px;padding:6px 11px;font-size:12.5px;display:flex;align-items:center;gap:6px}
.tbtn:hover{background:rgba(255,255,255,.2)}
/* ---------- layout ---------- */
.layout{display:flex;align-items:flex-start;max-width:1320px;margin:0 auto}
.sidebar{
  position:sticky;top:57px;width:280px;flex:none;height:calc(100vh - 57px);overflow-y:auto;
  padding:18px 14px 60px; border-right:1px solid var(--line);
}
.side-h{font-size:11px;font-weight:700;color:var(--muted);letter-spacing:1.5px;margin:4px 8px 10px;text-transform:uppercase}
.navitem{
  display:flex;gap:11px;align-items:flex-start;padding:10px 11px;border-radius:11px;cursor:pointer;
  margin-bottom:3px;transition:background .15s;
}
.navitem:hover{background:var(--card2)}
.navitem.active{background:var(--brand-soft)}
.navitem.active .ni-title{color:var(--brand);font-weight:700}
.ni-num{width:26px;height:26px;flex:none;border-radius:8px;background:var(--card);border:1px solid var(--line);
  display:grid;place-items:center;font-size:12px;font-weight:800;color:var(--ink2);position:relative}
.navitem.active .ni-num{background:var(--brand);color:#fff;border-color:var(--brand)}
.ni-num.core::after{content:"";position:absolute;top:-3px;right:-3px;width:8px;height:8px;border-radius:50%;
  background:var(--accent);border:1.5px solid var(--card)}
.ni-body{min-width:0}
.ni-title{font-size:13.5px;font-weight:600;line-height:1.4}
.ni-sub{font-size:11px;color:var(--muted);margin-top:2px;line-height:1.4}
.ni-done{margin-left:auto;color:#16a34a;font-size:14px;flex:none}
.depth-tag{font-size:9.5px;padding:1px 6px;border-radius:6px;font-weight:700;vertical-align:middle;margin-left:5px}
.depth-core{background:#fbeee0;color:#b45309}
.depth-supp{background:#eef0f6;color:#6b7280}
html[data-theme="dark"] .depth-core{background:#3a2c14}
html[data-theme="dark"] .depth-supp{background:#262b38}
/* ---------- main ---------- */
.main{flex:1;min-width:0;padding:26px 40px 90px}
.mod-head{margin-bottom:8px}
.mod-kicker{display:flex;align-items:center;gap:12px;margin-bottom:6px}
.mod-badge{font-size:13px;font-weight:800;color:#fff;background:var(--brand);padding:3px 12px;border-radius:8px;letter-spacing:.5px}
.mod-title{font-size:27px;font-weight:800;letter-spacing:-.3px;line-height:1.25;margin:2px 0 4px}
.mod-sub{color:var(--muted);font-size:14px;margin-bottom:14px}
.mod-intro{font-size:15.5px;color:var(--ink2);background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow)}
.bridge{margin:14px 0 8px;background:linear-gradient(100deg,#fff7ea,#fdf0d8);border:1px solid #f0dcae;
  border-radius:var(--radius);padding:15px 18px;position:relative}
html[data-theme="dark"] .bridge{background:linear-gradient(100deg,#2e2614,#332a16);border-color:#4a3c1c}
.bridge .bl{font-weight:800;color:#b45309;font-size:13px;display:flex;align-items:center;gap:7px;margin-bottom:5px}
.bridge .bt{font-size:14.5px;color:var(--ink2)}
/* sub nav */
.subnav{position:sticky;top:57px;z-index:30;background:var(--paper);
  display:flex;gap:7px;flex-wrap:wrap;padding:12px 0 12px;border-bottom:1px solid var(--line);margin:18px 0 6px}
.subnav a{font-size:12.5px;color:var(--ink2);background:var(--card);border:1px solid var(--line);
  padding:5px 12px;border-radius:20px;cursor:pointer}
.subnav a:hover{border-color:var(--brand);color:var(--brand)}
/* section card */
.sec{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 22px;margin:16px 0;box-shadow:var(--shadow)}
.sec h3{font-size:18px;font-weight:750;margin:0 0 10px;letter-spacing:-.2px;display:flex;gap:9px;align-items:baseline}
.sec h3 .dot{width:7px;height:7px;border-radius:50%;background:var(--brand);flex:none;transform:translateY(-2px)}
.sec .body{color:var(--ink2);font-size:15px}
.sec .body p{margin:0 0 11px}
.sec .body b,.sec .body strong{color:var(--ink);font-weight:700}
.sec .body u{text-decoration:none;background:linear-gradient(transparent 62%,#e9d8fb 62%);padding:0 1px}
html[data-theme="dark"] .sec .body u{background:linear-gradient(transparent 62%,#46307a 62%)}
.sec .body code{background:var(--card2);border:1px solid var(--line);border-radius:5px;padding:1px 6px;font-size:13px;color:var(--brand)}
/* callouts */
.callout{border-radius:11px;padding:11px 14px;margin:10px 0;font-size:13.8px;border:1px solid var(--line);
  background:var(--card2);border-left:4px solid var(--muted);position:relative}
.callout . co-h{font-weight:800;font-size:12px;letter-spacing:.5px;margin-bottom:3px;display:flex;align-items:center;gap:6px}
.callout . co-src{font-size:11px;color:var(--muted);margin-top:6px;font-style:italic}
.callout . co-src::before{content:"📎 "}
.co-要点{border-left-color:var(--c-yaodian)} .co-要点 .co-h{color:var(--c-yaodian)}
.co-红旗{border-left-color:var(--c-hongqi);background:#fef4f4} .co-红旗 .co-h{color:var(--c-hongqi)}
.co-真实摘录{border-left-color:var(--c-zhaiyao)} .co-真实摘录 .co-h{color:var(--c-zhaiyao)}
.co-思维切换{border-left-color:var(--c-siwei);background:#fff8ee} .co-思维切换 .co-h{color:var(--c-siwei)}
.co-易错点{border-left-color:var(--c-yicuo);background:#fff5f0} .co-易错点 .co-h{color:var(--c-yicuo)}
.co-政策依据{border-left-color:var(--c-zhengce)} .co-政策依据 .co-h{color:var(--c-zhengce)}
html[data-theme="dark"] .co-红旗{background:#2c1a1a} html[data-theme="dark"] .co-思维切换{background:#2c2410}
html[data-theme="dark"] .co-易错点{background:#2c1d14}
/* diagram block */
.diag{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;margin:16px 0;box-shadow:var(--shadow)}
.diag > .dh{font-size:16px;font-weight:750;margin-bottom:4px;display:flex;align-items:center;gap:8px}
.diag > .dh .tag{font-size:10px;font-weight:700;padding:2px 8px;border-radius:6px;background:var(--brand-soft);color:var(--brand)}
.diag > .dc{font-size:12.5px;color:var(--muted);margin-bottom:12px}
/* matrix */
.mtx{width:100%;border-collapse:separate;border-spacing:0;font-size:13.3px;overflow:hidden;border-radius:10px;border:1px solid var(--line)}
.mtx th,.mtx td{padding:9px 12px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line2);border-right:1px solid var(--line2)}
.mtx th{background:var(--brand-soft);color:var(--brand);font-weight:700;position:sticky}
.mtx tr td:first-child{font-weight:700;color:var(--ink);background:var(--card2)}
.mtx tr:last-child td{border-bottom:none}
.mtx th:last-child,.mtx td:last-child{border-right:none}
.mtx-scroll{overflow-x:auto}
/* docmap accordion */
.doc-item{border:1px solid var(--line);border-radius:11px;margin-bottom:9px;overflow:hidden;background:var(--card2)}
.doc-hd{padding:12px 15px;cursor:pointer;display:flex;align-items:center;gap:10px;font-weight:650;font-size:14.5px}
.doc-hd:hover{background:var(--brand-soft)}
.doc-hd .ch{width:22px;height:22px;border-radius:7px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:11px;font-weight:800;flex:none}
.doc-hd .arr{margin-left:auto;transition:transform .25s;color:var(--muted)}
.doc-item.open .doc-hd .arr{transform:rotate(90deg)}
.doc-bd{display:none;padding:4px 16px 15px 47px}
.doc-item.open .doc-bd{display:block}
.dm-grp{margin-top:11px}
.dm-grp .lbl{font-size:11.5px;font-weight:800;letter-spacing:.5px;margin-bottom:5px}
.dm-check .lbl{color:var(--c-yaodian)} .dm-flag .lbl{color:var(--c-hongqi)}
.dm-grp ul{margin:0;padding-left:18px} .dm-grp li{margin:3px 0;font-size:13.5px;color:var(--ink2)}
.dm-excerpt{margin-top:11px;background:var(--card);border-left:3px solid var(--c-zhaiyao);border-radius:8px;padding:10px 13px;font-size:13.3px;color:var(--ink2)}
.dm-excerpt .src{font-size:11px;color:var(--muted);font-style:italic;margin-top:5px}
/* checklist */
.ckl-grp{margin-bottom:14px}
.ckl-gh{font-size:13.5px;font-weight:750;color:var(--brand);margin-bottom:7px;padding-bottom:5px;border-bottom:1px dashed var(--line)}
.ckl-item{display:flex;gap:11px;padding:9px 11px;border-radius:9px;cursor:pointer;align-items:flex-start}
.ckl-item:hover{background:var(--card2)}
.ckl-box{width:20px;height:20px;border:2px solid var(--line);border-radius:6px;flex:none;display:grid;place-items:center;
  font-size:12px;color:#fff;transition:all .15s;margin-top:2px}
.ckl-item.checked .ckl-box{background:#16a34a;border-color:#16a34a}
.ckl-item.checked .ck-point{text-decoration:line-through;color:var(--muted)}
.ck-point{font-weight:650;font-size:14px}
.ck-detail{font-size:13px;color:var(--ink2);margin-top:3px}
.ck-src{font-size:11px;color:var(--muted);font-style:italic;margin-top:4px}
.ckl-prog{font-size:11.5px;color:var(--muted);float:right;font-weight:600}
/* timeline */
.tl{position:relative;padding-left:34px}
.tl::before{content:"";position:absolute;left:11px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--brand),var(--brand2))}
.tl-ev{position:relative;margin-bottom:16px;background:var(--card2);border:1px solid var(--line);border-radius:11px;padding:13px 16px}
.tl-ev::before{content:"";position:absolute;left:-28px;top:16px;width:13px;height:13px;border-radius:50%;
  background:var(--brand);border:3px solid var(--card);box-shadow:0 0 0 2px var(--brand)}
.tl-ph{font-weight:750;font-size:14.5px;color:var(--brand)}
.tl-desc{font-size:13.5px;color:var(--ink2);margin:5px 0}
.tl-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}
.tl-chip{font-size:11.5px;padding:3px 9px;border-radius:7px;background:var(--card);border:1px solid var(--line)}
.tl-chip b{color:var(--ink)}
.tl-pit{font-size:12.5px;color:var(--c-hongqi);background:#fef4f4;border-radius:7px;padding:5px 10px;margin-top:7px}
html[data-theme="dark"] .tl-pit{background:#2c1a1a}
/* flow */
.flow{display:flex;gap:0;flex-wrap:wrap;align-items:stretch}
.flow-step{flex:1;min-width:200px;background:var(--card2);border:1px solid var(--line);border-radius:11px;padding:13px 15px;position:relative;margin:0 10px 28px 0}
.flow-step .fs-node{font-weight:800;font-size:14.5px;color:var(--brand);margin-bottom:3px}
.flow-step .fs-doc{font-size:12.5px;font-weight:600;color:var(--ink);background:var(--brand-soft);border-radius:6px;padding:2px 8px;display:inline-block;margin-bottom:7px}
.flow-step ul{margin:0;padding-left:16px} .flow-step li{font-size:12.5px;color:var(--ink2);margin:3px 0}
.flow-step .fs-src{font-size:10.5px;color:var(--muted);font-style:italic;margin-top:7px}
.flow-step:not(:last-child)::after{content:"▶";position:absolute;right:-16px;top:50%;transform:translateY(-50%);color:var(--brand);font-size:14px;z-index:2}
/* calc */
.calc-formula{background:var(--ink);color:#fff;border-radius:10px;padding:13px 16px;font-size:13.5px;font-family:ui-monospace,Menlo,monospace;line-height:1.6;overflow-x:auto}
html[data-theme="dark"] .calc-formula{background:#0c0e14;border:1px solid var(--line)}
.calc-live{display:flex;gap:14px;flex-wrap:wrap;align-items:flex-end;margin:14px 0;background:var(--card2);border:1px solid var(--line);border-radius:11px;padding:15px}
.calc-fld{display:flex;flex-direction:column;gap:4px}
.calc-fld label{font-size:12px;color:var(--muted);font-weight:600}
.calc-fld input{width:130px;padding:8px 10px;border:1px solid var(--line);border-radius:8px;font-size:14px;background:var(--card);color:var(--ink)}
.calc-out{margin-left:auto;text-align:right}
.calc-out .v{font-size:24px;font-weight:800;color:var(--brand)}
.calc-out .l{font-size:11.5px;color:var(--muted)}
.calc-vars{font-size:12.5px;margin-top:6px}
.calc-vars td{padding:5px 10px;border-bottom:1px solid var(--line2)}
.calc-we{margin-top:10px;font-size:13px;background:var(--brand-soft);border-radius:9px;padding:11px 14px;color:var(--ink2)}
/* structure svg */
.struct-wrap{overflow-x:auto;background:var(--card2);border:1px solid var(--line);border-radius:11px;padding:8px}
.struct-legend{display:flex;gap:14px;flex-wrap:wrap;font-size:11.5px;color:var(--muted);margin-top:8px}
.struct-legend i{display:inline-block;width:22px;height:0;border-top:3px solid;vertical-align:middle;margin-right:4px}
.struct-detail{margin-top:10px;font-size:13px;background:var(--card);border:1px dashed var(--line);border-radius:9px;padding:11px 14px;min-height:20px;color:var(--ink2)}
.snode{cursor:pointer}
.snode rect{transition:all .15s}
.snode:hover rect{filter:brightness(.97)}
.snode.sel rect{stroke-width:3px}
/* glossary */
.gl-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:11px}
.gl-card{background:var(--card2);border:1px solid var(--line);border-radius:11px;padding:13px 15px;cursor:pointer;transition:all .15s}
.gl-card:hover{border-color:var(--brand);box-shadow:var(--shadow)}
.gl-term{font-weight:750;font-size:14.5px;color:var(--brand);display:flex;align-items:center;justify-content:space-between}
.gl-term .flip{font-size:11px;color:var(--muted)}
.gl-def{font-size:13px;color:var(--ink2);margin-top:7px;display:none}
.gl-card.open .gl-def{display:block}
.gl-analogy{font-size:12.5px;margin-top:8px;background:#fff7ea;border-radius:7px;padding:7px 10px;color:#92600c;display:none}
html[data-theme="dark"] .gl-analogy{background:#2e2614;color:#e0b85a}
.gl-card.open .gl-analogy{display:block}
.gl-analogy::before{content:"🔗 债券类比 · ";font-weight:700}
/* examples */
.ex-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:12px}
.ex-card{background:var(--card2);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:11px;padding:14px 16px}
.ex-deal{font-weight:750;font-size:14.5px;color:var(--ink)}
.ex-type{font-size:10.5px;font-weight:700;color:var(--accent);letter-spacing:.5px;text-transform:uppercase}
.ex-take{font-size:13px;color:var(--ink2);margin-top:7px}
.ex-src{font-size:11px;color:var(--muted);font-style:italic;margin-top:7px}
/* quiz */
.quiz-bar{display:flex;align-items:center;gap:14px;flex-wrap:wrap;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:14px 18px;box-shadow:var(--shadow);margin-bottom:14px;position:sticky;top:57px;z-index:20}
.quiz-score{font-size:15px;font-weight:800}
.quiz-score .ok{color:#16a34a} .quiz-score .tot{color:var(--muted)}
.qfilter{display:flex;gap:6px;flex-wrap:wrap}
.qfilter button{font-size:11.5px;padding:4px 11px;border-radius:18px;border:1px solid var(--line);background:var(--card2);cursor:pointer;color:var(--ink2)}
.qfilter button.on{background:var(--brand);color:#fff;border-color:var(--brand)}
.q-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:17px 20px;margin-bottom:12px;box-shadow:var(--shadow)}
.q-mod{font-size:10.5px;font-weight:800;color:var(--brand);letter-spacing:.5px}
.q-q{font-size:15px;font-weight:650;margin:5px 0 12px}
.q-opt{display:block;width:100%;text-align:left;padding:10px 14px;border:1px solid var(--line);border-radius:10px;
  background:var(--card2);margin-bottom:8px;cursor:pointer;font-size:14px;color:var(--ink);transition:all .12s}
.q-opt:hover{border-color:var(--brand)}
.q-opt.correct{background:#eaf7ee;border-color:#16a34a;color:#15803d;font-weight:600}
.q-opt.wrong{background:#fdecec;border-color:#dc2626;color:#b91c1c}
.q-opt.disabled{cursor:default;pointer-events:none}
.q-exp{display:none;margin-top:8px;font-size:13.3px;background:var(--brand-soft);border-radius:9px;padding:11px 14px;color:var(--ink2)}
.q-exp.show{display:block}
.q-exp .src{font-size:11px;color:var(--muted);font-style:italic;margin-top:6px}
/* practice drills (实操训练营) */
.q-scenario{background:var(--card2);border:1px solid var(--line);border-left:4px solid var(--c-zhaiyao);border-radius:9px;padding:11px 14px;margin:2px 0 11px;font-size:13.5px;color:var(--ink2);line-height:1.7}
.q-scenario .sc-h{font-size:11px;font-weight:800;color:var(--c-zhaiyao);letter-spacing:.5px;margin-bottom:5px}
.q-tags{display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin-bottom:4px}
.q-diff{font-size:10px;font-weight:800;padding:1px 8px;border-radius:6px;letter-spacing:.5px}
.q-diff.入门{background:#e7f3ee;color:#16794a} .q-diff.进阶{background:#fef0e0;color:#b4540a} .q-diff.实战{background:#fdeaea;color:#c01f1f}
html[data-theme="dark"] .q-diff.入门{background:#14301f;color:#5fd39a} html[data-theme="dark"] .q-diff.进阶{background:#332514;color:#e0a85a} html[data-theme="dark"] .q-diff.实战{background:#331616;color:#f08585}
.q-typetag{font-size:10px;font-weight:700;padding:1px 8px;border-radius:6px;background:var(--brand-soft);color:var(--brand)}
.q-opt .qbox{display:inline-block;width:18px;height:18px;border:1.5px solid var(--muted);margin-right:9px;text-align:center;line-height:16px;font-size:11px;vertical-align:middle;color:transparent}
.q-opt.multi .qbox{border-radius:5px} .q-opt.single .qbox{border-radius:50%}
.q-opt.picked .qbox{background:var(--brand);border-color:var(--brand);color:#fff}
.q-opt.correct .qbox{background:#16a34a;border-color:#16a34a;color:#fff}
.q-opt.wrong .qbox{background:#dc2626;border-color:#dc2626;color:#fff}
.q-opt.miss{border-style:dashed;border-color:#16a34a}
.q-multi-submit{margin:4px 0 4px;font-size:12.5px;padding:6px 16px}
.q-calc{display:flex;gap:10px;align-items:flex-end;flex-wrap:wrap;margin:6px 0 4px}
.q-calc input{width:160px;padding:9px 11px;border:1px solid var(--line);border-radius:9px;font-size:15px;background:var(--card);color:var(--ink)}
.q-calc .unit{font-size:13px;color:var(--muted);padding-bottom:9px}
.q-calc button{font-size:13px;padding:8px 16px}
.q-calc.correct input{border-color:#16a34a;background:#eaf7ee} .q-calc.wrong input{border-color:#dc2626;background:#fdecec}
.q-verdict{font-size:13px;font-weight:700;margin:4px 0;display:none} .q-verdict.show{display:block}
.q-verdict.ok{color:#16a34a} .q-verdict.no{color:#dc2626}
.q-formula{font-family:ui-monospace,Menlo,monospace;font-size:12.5px;background:var(--ink);color:#fff;border-radius:8px;padding:9px 12px;margin-top:7px;overflow-x:auto;white-space:pre-wrap}
html[data-theme="dark"] .q-formula{background:#0c0e14;border:1px solid var(--line)}
/* case challenge */
.case-pick{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px;margin-bottom:8px}
.case-card{background:var(--card);border:1px solid var(--line);border-radius:13px;padding:16px 18px;cursor:pointer;box-shadow:var(--shadow);transition:all .15s;border-top:3px solid var(--accent)}
.case-card:hover{border-color:var(--brand);transform:translateY(-2px)}
.case-card .ct{font-weight:750;font-size:15px;margin-bottom:5px}
.case-card .cd{font-size:12px;color:var(--muted)}
.case-card .cmeta{font-size:11.5px;color:var(--brand);margin-top:9px;font-weight:600}
.case-prog{font-size:12px;color:var(--muted);margin-left:auto}
.case-bg{background:linear-gradient(100deg,var(--brand-soft),var(--card2));border:1px solid var(--line);border-radius:12px;padding:15px 18px;margin-bottom:14px}
.case-bg .bh{font-weight:800;font-size:15px;color:var(--brand);margin-bottom:5px}
.case-bg .bt{font-size:14px;color:var(--ink2);line-height:1.7}
.case-steps-nav{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:12px}
.case-stepdot{width:30px;height:30px;border-radius:9px;border:1px solid var(--line);background:var(--card2);display:grid;place-items:center;font-size:12px;font-weight:700;cursor:pointer;color:var(--ink2)}
.case-stepdot.cur{background:var(--brand);color:#fff;border-color:var(--brand)}
.case-stepdot.ok{border-color:#16a34a;color:#16a34a}
.case-stepdot.ok.cur{background:#16a34a;color:#fff}
.case-setup{background:var(--card2);border-left:3px solid var(--brand);border-radius:8px;padding:10px 14px;margin-bottom:10px;font-size:13.5px;color:var(--ink2)}
.case-setup .sh{font-size:11px;font-weight:800;color:var(--brand);margin-bottom:4px}
.case-stage{font-size:16px;font-weight:750;margin-bottom:8px}
/* 基础概念课 */
.lesson-toc{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px;margin:14px 0}
.lt-card{background:var(--card);border:1px solid var(--line);border-radius:13px;padding:15px 17px;cursor:pointer;box-shadow:var(--shadow);transition:all .15s;border-left:4px solid var(--c-zhaiyao)}
.lt-card:hover{border-color:var(--c-zhaiyao);transform:translateY(-2px)}
.lt-num{font-size:12px;font-weight:800;color:var(--c-zhaiyao);letter-spacing:.5px}
.lt-t{font-weight:750;font-size:15.5px;margin:5px 0 4px}
.lt-d{font-size:12.5px;color:var(--muted)}
.lt-cnt{font-size:11.5px;color:var(--c-zhaiyao);margin-top:8px;font-weight:600}
.concept{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:0;margin:16px 0;box-shadow:var(--shadow);overflow:hidden}
.cpt-head{padding:15px 20px;background:linear-gradient(100deg,var(--brand-soft),var(--card2));border-bottom:1px solid var(--line);cursor:pointer;display:flex;align-items:flex-start;gap:12px}
.cpt-head:hover{background:var(--brand-soft)}
.cpt-no{width:30px;height:30px;flex:none;border-radius:9px;background:var(--c-zhaiyao);color:#fff;display:grid;place-items:center;font-size:13px;font-weight:800}
.cpt-hmain{flex:1;min-width:0}
.cpt-term{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:-.2px}
.cpt-oneline{font-size:13.5px;color:var(--c-zhaiyao);margin-top:3px;font-weight:600}
.cpt-arr{color:var(--muted);transition:transform .25s;font-size:13px;margin-top:6px}
.concept.open .cpt-arr{transform:rotate(90deg)}
.cpt-body{display:none;padding:6px 20px 18px}
.concept.open .cpt-body{display:block}
.cpt-sec{margin-top:14px}
.cpt-lbl{font-size:11.5px;font-weight:800;letter-spacing:.5px;margin-bottom:5px;display:flex;align-items:center;gap:6px}
.cpt-plain .cpt-lbl{color:var(--ink2)} .cpt-plain .ct{font-size:14.5px;color:var(--ink2);line-height:1.8}
.cpt-bond{background:#fff7ea;border-radius:9px;padding:10px 13px} .cpt-bond .cpt-lbl{color:#b45309}
html[data-theme="dark"] .cpt-bond{background:#2e2614}
.cpt-life{background:var(--card2);border-radius:9px;padding:10px 13px} .cpt-life .cpt-lbl{color:var(--c-zhaiyao)}
.cpt-why{border-left:3px solid var(--brand);padding-left:13px} .cpt-why .cpt-lbl{color:var(--brand)}
.cpt-eg{background:var(--card2);border-left:3px solid var(--accent);border-radius:8px;padding:10px 13px;font-size:13.5px;color:var(--ink2)}
.cpt-eg .src{font-size:11px;color:var(--muted);font-style:italic;margin-top:5px}
.cpt-pit{background:#fff5f0;border-radius:9px;padding:10px 13px;font-size:13.3px;color:var(--ink2)} .cpt-pit .cpt-lbl{color:var(--c-yicuo)}
html[data-theme="dark"] .cpt-pit{background:#2c1d14}
.cpt-quiz{margin-top:14px;background:var(--brand-soft);border-radius:10px;padding:12px 15px}
.cpt-quiz .qh{font-size:12px;font-weight:800;color:var(--brand);margin-bottom:8px}
.cpt-quiz .q-opt{background:var(--card)}
.cpt-ct-list .ct{font-size:14.5px;color:var(--ink2);line-height:1.8}
.lesson-prog{font-size:12px;color:var(--muted)}
/* footer nav */
.mod-foot{display:flex;align-items:center;gap:12px;margin-top:30px;padding-top:20px;border-top:1px solid var(--line)}
.btn{cursor:pointer;border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:10px;
  padding:9px 16px;font-size:13.5px;font-weight:600;display:inline-flex;align-items:center;gap:7px}
.btn:hover{border-color:var(--brand);color:var(--brand)}
.btn.primary{background:var(--brand);color:#fff;border-color:var(--brand)} .btn.primary:hover{background:var(--brand2);color:#fff}
.btn.done{background:#16a34a;color:#fff;border-color:#16a34a}
.btn-next{margin-left:auto}
/* misc */
.h2blk{font-size:13px;font-weight:800;letter-spacing:1px;color:var(--muted);text-transform:uppercase;margin:26px 0 4px}
.menu-toggle{display:none}
@media(max-width:980px){
  .sidebar{position:fixed;left:0;top:57px;z-index:60;background:var(--paper);transform:translateX(-102%);transition:transform .25s;box-shadow:var(--shadow)}
  .sidebar.open{transform:translateX(0)}
  .main{padding:20px 18px 80px}
  .menu-toggle{display:flex}
  .mod-title{font-size:22px}
}
.scrim{display:none;position:fixed;inset:57px 0 0;background:rgba(0,0,0,.35);z-index:55}
.scrim.show{display:block}
/* home */
.home{max-width:940px}
.hero{background:linear-gradient(120deg,var(--brand),var(--brand2));color:#fff;border-radius:18px;padding:32px 34px;box-shadow:var(--shadow)}
.hero-badge{display:inline-block;font-size:11.5px;font-weight:700;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.3);padding:4px 11px;border-radius:20px;letter-spacing:.5px}
.hero h1{font-size:32px;font-weight:850;margin:12px 0 8px;letter-spacing:-.5px}
.hero-sub{font-size:15px;opacity:.95;line-height:1.7;max-width:700px;margin:0 0 16px}
.hero-stats{display:flex;gap:20px;flex-wrap:wrap;margin-bottom:18px;font-size:13px;opacity:.95}
.hero-stats b{font-size:20px;font-weight:850;margin-right:3px}
.hero .btn.primary{background:#fff;color:var(--brand);border:none;font-weight:800}
.hero .btn.primary:hover{background:#f3edfa;color:var(--brand)}
.hero-prog{margin-left:14px;font-size:12.5px;opacity:.9}
.how{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 22px;margin:18px 0;box-shadow:var(--shadow)}
.how-h{font-weight:800;font-size:15px;margin-bottom:8px}
.how ul{margin:0;padding-left:20px} .how li{margin:6px 0;color:var(--ink2);font-size:14px}
.path-h,.legend-h{font-size:13px;font-weight:800;letter-spacing:1px;color:var(--muted);text-transform:uppercase;margin:24px 0 12px}
.hp-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(162px,1fr));gap:12px}
.hp-card{background:var(--card);border:1px solid var(--line);border-radius:13px;padding:15px;cursor:pointer;transition:all .15s;box-shadow:var(--shadow)}
.hp-card:hover{border-color:var(--brand);transform:translateY(-2px)}
.hp-card.core{border-top:3px solid var(--accent)}
.hp-num{display:flex;align-items:center;gap:7px;font-size:18px;font-weight:800;color:var(--brand)}
.hp-num span{font-size:13px;background:var(--brand-soft);padding:1px 8px;border-radius:6px}
.hp-t{font-weight:700;font-size:14.5px;margin:8px 0 3px;line-height:1.4}
.hp-d{font-size:11.5px;color:var(--muted)}
.hp-ok{font-size:11px;color:#16a34a;font-weight:700;margin-top:5px}
.co-legend{display:flex;gap:10px;flex-wrap:wrap}
.co-legend span{font-size:12.5px;font-weight:700;padding:5px 12px;border-radius:9px;border:1px solid var(--line);border-left-width:4px}
/* 极小链接：休闲小游戏的隐蔽入口（移到页面底部，弱化处理，仍可访问） */
.mini-links{margin-top:30px;padding-top:14px;border-top:1px dashed var(--line);font-size:12px;color:var(--muted);text-align:center;line-height:2}
.mini-links .ml-h{opacity:.65}
.mini-links a{color:var(--muted);text-decoration:none;margin:0 4px}
.mini-links a:hover{color:var(--brand);text-decoration:underline}