.tw-badge{display:inline-flex;align-items:center;gap:6px;padding:5px 9px;border:1px solid #d9d4ff;border-radius:999px;background:#f6f4ff;color:#5b50d8;font-size:12px;font-weight:700;margin-bottom:8px}.mindmap-shell{display:grid;grid-template-columns:270px minmax(0,1fr);gap:16px;margin-top:14px}.mind-chapter-nav{padding:10px;align-self:start;position:sticky;top:74px;max-height:calc(100vh - 98px);overflow:auto}.mind-side-head{padding:10px 10px 12px}.mind-side-head strong{display:block;font-size:15px}.mind-side-head small{display:block;color:var(--muted,#7a8091);margin-top:4px}.mind-chapter-btn{width:100%;display:grid;grid-template-columns:34px minmax(0,1fr);gap:9px;text-align:left;border:1px solid transparent;background:transparent;border-radius:12px;padding:10px;position:relative;color:inherit}.mind-chapter-btn:hover{background:#f8f8fc}.mind-chapter-btn.active{background:#f3f1ff;border-color:#dcd7ff}.mind-chapter-no{width:30px;height:30px;border-radius:9px;background:#f0eff6;display:grid;place-items:center;font-size:11px;font-weight:800;color:#7a7f90}.mind-chapter-btn.active .mind-chapter-no{background:#6d5dfc;color:#fff}.mind-chapter-btn strong{display:block;font-size:13px;line-height:1.35;padding-right:4px}.mind-chapter-btn small{display:block;color:#8a8f9f;font-size:11px;margin-top:3px}.mind-chapter-progress{grid-column:2;height:3px;border-radius:9px;background:#e9e9f0;overflow:hidden}.mind-chapter-progress i{display:block;height:100%;background:#6d5dfc;border-radius:inherit}.mind-main{min-width:0;display:grid;gap:14px}.mind-overview{padding:17px}.mind-summary{display:flex;gap:14px;flex-wrap:wrap;font-size:12px;color:#777d8f}.mind-summary b{font-size:15px;color:#222634;margin-right:3px}.mind-tree-v2{margin-top:14px;border:1px solid #e5e5ef;border-radius:16px;padding:20px;background:linear-gradient(180deg,#fff,#fafaff)}.mind-root-v2{max-width:330px;margin:0 auto 22px;text-align:center;background:#202536;color:#fff;padding:15px 18px;border-radius:15px;box-shadow:0 10px 25px rgba(35,39,57,.12)}.mind-root-v2 strong{display:block;font-size:18px}.mind-root-v2 small{display:block;color:#c8ccda;margin-top:5px;font-size:11px}.mind-branches-v2{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;position:relative}.mind-branch-v2{border:1px solid #dedfeb;border-radius:13px;padding:12px 12px 12px 18px;background:#fff;position:relative}.branch-dot{width:7px;height:7px;border-radius:50%;background:#6d5dfc;position:absolute;left:8px;top:17px}.mind-branch-v2 strong{display:block;font-size:13px}.mind-branch-v2 small{display:block;color:#898f9f;font-size:11px;margin-top:3px}.mind-section-v2{overflow:hidden}.mind-section-head{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:15px 16px;border-bottom:1px solid #ececf2}.mind-section-head>div:first-child{display:flex;align-items:center;gap:10px}.section-index{width:28px;height:28px;border-radius:9px;display:grid;place-items:center;background:#eeeaff;color:#5f51df;font-weight:800;font-size:12px}.mind-section-head h3{margin:0;font-size:16px}.mind-section-head small{color:#8a8f9e;font-size:11px}.section-progress{width:130px;height:6px;background:#ececf4;border-radius:99px;overflow:hidden}.section-progress i{display:block;height:100%;background:#6d5dfc;border-radius:inherit}.mind-point-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px;padding:13px}.mind-point-v2{border:1px solid #e3e4ec;border-radius:14px;padding:13px;background:#fff;transition:.18s ease;min-width:0}.mind-point-v2.mastered{border-color:#bfe5ce;background:#fbfffc}.mind-point-v2.hinted{border-color:#e6dc9e;background:#fffefa}.mind-point-v2.missed{border-color:#f2c1c1}.point-top{display:flex;justify-content:space-between;gap:8px;align-items:center;margin-bottom:8px}.point-kind{font-size:10px;font-weight:800;color:#696f80;background:#f3f4f7;padding:3px 7px;border-radius:99px}.point-state{font-size:10px;color:#9196a4}.mastered .point-state{color:#31885b;font-weight:700}.hinted .point-state{color:#9b7720;font-weight:700}.missed .point-state{color:#c04b4b;font-weight:700}.point-question{font-size:14px;font-weight:700;line-height:1.55;margin-bottom:9px}.mind-answer-v2{width:100%;border:0;border-bottom:1.5px dashed #a9adbc;padding:8px 2px;font-size:14px;background:transparent;outline:none;color:#1e2330}.mind-answer-v2:focus{border-bottom-color:#6d5dfc}.point-actions{display:flex;justify-content:flex-end;margin-top:7px}.mind-hint-box{margin-top:8px;padding:9px 10px;border-radius:10px;background:#fff8d9;color:#665515;font-size:12px;line-height:1.45}.mind-hint-box span{display:block;font-size:10px;font-weight:800;margin-bottom:2px}.correct-memory{margin-top:9px;border-radius:10px;background:#edf9f2;padding:9px 10px;color:#2b7850}.correct-memory span{display:block;font-size:10px;font-weight:800;opacity:.8;margin-bottom:3px}.correct-memory strong{font-size:12px;line-height:1.5}.mind-completion{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px}.mind-completion p{margin:5px 0 0;color:#777e8f;line-height:1.55;font-size:13px}.mind-completion-ring{--p:0;width:86px;height:86px;border-radius:50%;background:conic-gradient(#6d5dfc calc(var(--p)*1%),#ececf4 0);display:grid;place-items:center;position:relative;flex:0 0 auto}.mind-completion-ring:after{content:"";position:absolute;inset:8px;border-radius:50%;background:#fff}.mind-completion-ring strong,.mind-completion-ring small{position:relative;z-index:1;text-align:center}.mind-completion-ring strong{font-size:18px;align-self:end}.mind-completion-ring small{font-size:9px;color:#888d9c;align-self:start;margin-top:-8px}@media(max-width:980px){.mindmap-shell{grid-template-columns:1fr}.mind-chapter-nav{position:static;max-height:none;display:flex;overflow-x:auto;gap:8px;padding:9px}.mind-side-head{min-width:160px}.mind-chapter-btn{min-width:190px}.mind-point-grid{grid-template-columns:1fr}.section-progress{width:90px}}@media(max-width:620px){.mindmap-shell{margin-top:10px}.mind-overview{padding:12px}.mind-tree-v2{padding:14px}.mind-branches-v2{grid-template-columns:1fr 1fr}.mind-summary{gap:8px}.mind-section-head{align-items:flex-start}.section-progress{width:70px;margin-top:8px}.mind-point-grid{padding:9px;gap:9px}.mind-point-v2{padding:12px}.mind-completion{align-items:flex-start}.mind-completion-ring{width:72px;height:72px}.tw-badge{margin-top:2px}}