:root{--ss-snap:#f97316;--ss-snap-600:#ea580c;--ss-sort:#2563eb;--ss-sort-600:#1d4ed8;--ss-bg:#f7f8fa;--ss-surface:#fff;--ss-ink:#1f2937;--ss-ink-soft:#4b5563;--ss-muted:#6b7280;--ss-line:#e5e7eb;--ss-line-strong:#d1d5db;--ss-ok:#16a34a;--ss-ok-bg:#ecfdf5;--ss-bad:#dc2626;--ss-bad-bg:#fef2f2;--ss-warn:#d97706;--ss-warn-bg:#fffbeb;--ss-dunno:#7c3aed;--ss-dunno-bg:#f5f3ff;--ss-radius:14px;--ss-radius-sm:10px;--ss-shadow:0 1px 2px #1018280f, 0 4px 16px #1018280f;--ss-shadow-lg:0 8px 30px #1018281f;--sp-1:4px;--sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:20px;--sp-6:24px;--sp-8:32px;--fs-sm:clamp(.82rem, .78rem + .2vw, .92rem);--fs-base:clamp(.95rem, .9rem + .3vw, 1.05rem);--fs-lg:clamp(1.1rem, 1rem + .6vw, 1.3rem);--fs-xl:clamp(1.35rem, 1.1rem + 1.2vw, 1.8rem);--fs-2xl:clamp(1.7rem, 1.3rem + 2vw, 2.4rem);--tap:44px;--stage:720px}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%}body{background:var(--ss-bg);color:var(--ss-ink);font-family:system-ui,-apple-system,Segoe UI,Microsoft YaHei,PingFang SC,Hiragino Sans GB,sans-serif;font-size:var(--fs-base);padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);margin:0;line-height:1.55}h1,h2,h3,p{margin:0}button{font:inherit;cursor:pointer;touch-action:manipulation}.choice,.cloze-select,.tch-row.clickable,a{touch-action:manipulation}input,button{font-family:inherit}a{color:var(--ss-sort)}.katex{font-size:1.04em}.katex-display{margin:.4em 0;overflow:auto hidden}.btn{justify-content:center;align-items:center;gap:var(--sp-2);min-height:var(--tap);padding:0 var(--sp-5);border-radius:var(--ss-radius-sm);background:var(--ss-surface);color:var(--ss-ink);font-size:var(--fs-base);border:1px solid #0000;font-weight:600;transition:transform 50ms,background .15s,box-shadow .15s;display:inline-flex}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-block{width:100%}.btn-primary{background:var(--ss-snap);color:#fff}.btn-primary:hover{background:var(--ss-snap-600)}.btn-secondary{background:var(--ss-sort);color:#fff}.btn-secondary:hover{background:var(--ss-sort-600)}.btn-ghost{border-color:var(--ss-line-strong);color:var(--ss-ink-soft);background:0 0}.btn-ghost:hover{background:#fff}.card{background:var(--ss-surface);border:1px solid var(--ss-line);border-radius:var(--ss-radius);box-shadow:var(--ss-shadow);padding:var(--sp-5)}.muted{color:var(--ss-muted)}.text-center{text-align:center}.field{margin-bottom:var(--sp-4);display:block}.field>label{margin-bottom:var(--sp-2);font-size:var(--fs-sm);color:var(--ss-ink-soft);font-weight:600;display:block}.input{width:100%;min-height:var(--tap);padding:var(--sp-2) var(--sp-3);border:1px solid var(--ss-line-strong);border-radius:var(--ss-radius-sm);font-size:var(--fs-base);color:var(--ss-ink);background:#fff}.input:focus{border-color:var(--ss-sort);outline:none;box-shadow:0 0 0 3px #2563eb26}.form-error{margin-top:var(--sp-2);color:var(--ss-bad);font-size:var(--fs-sm);min-height:1.2em}.state-msg{text-align:center;color:var(--ss-muted);padding:var(--sp-8) var(--sp-4)}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (prefers-reduced-motion:reduce){*{transition-duration:.001ms!important;animation-duration:.001ms!important}}#app{flex-direction:column;min-height:100dvh;display:flex}.shell-header{z-index:20;align-items:center;gap:var(--sp-3);padding:var(--sp-3) var(--sp-4);-webkit-backdrop-filter:saturate(180%)blur(8px);backdrop-filter:saturate(180%)blur(8px);border-bottom:1px solid var(--ss-line);background:#ffffffeb;display:flex;position:sticky;top:0}.shell-logo{font-size:var(--fs-lg);letter-spacing:-.5px;color:var(--ss-snap);white-space:nowrap;font-weight:800;text-decoration:none}.shell-logo .accent{color:var(--ss-sort)}.shell-logo .zh{color:var(--ss-ink);margin-left:6px;font-size:.7em;font-weight:700}.shell-spacer{flex:1}.shell-user{font-size:var(--fs-sm);color:var(--ss-ink-soft);text-overflow:ellipsis;white-space:nowrap;max-width:40vw;overflow:hidden}@media (width<=640px){.shell-user{max-width:28vw}.shell-user-school{display:none}}.shell-logout{min-height:36px;padding:0 var(--sp-3);border:1px solid var(--ss-line-strong);color:var(--ss-ink-soft);font-size:var(--fs-sm);background:#fff;border-radius:999px;font-weight:600}.shell-logout:hover{border-color:var(--ss-snap);color:var(--ss-snap)}.shell-main{width:100%;max-width:var(--stage);padding:var(--sp-5) var(--sp-4) calc(var(--sp-8) + env(safe-area-inset-bottom));flex:1;margin:0 auto}.center-page{padding:clamp(var(--sp-6), 8vh, 88px) var(--sp-4) var(--sp-8);flex:1;justify-content:center;align-items:flex-start;display:flex}.center-page .panel{width:100%;max-width:420px}.brand-hero{text-align:center;margin-bottom:var(--sp-6)}.brand-hero .name{font-size:var(--fs-2xl);letter-spacing:-1px;color:var(--ss-snap);font-weight:800}.brand-hero .name .accent{color:var(--ss-sort)}.brand-hero .zh{color:var(--ss-ink);margin-left:8px;font-size:.5em;font-weight:700}.brand-hero .tagline{margin-top:var(--sp-2);color:var(--ss-muted);font-size:var(--fs-sm)}.card-grid{gap:var(--sp-4);grid-template-columns:repeat(auto-fit,minmax(260px,1fr));display:grid}.stat{gap:var(--sp-1);flex-direction:column;display:flex}.stat .num{font-size:var(--fs-2xl);font-weight:800;line-height:1}.stat .num.snap{color:var(--ss-snap)}.stat .num.sort{color:var(--ss-sort)}.stat .lbl{color:var(--ss-muted);font-size:var(--fs-sm)}.placeholder{text-align:center;padding:var(--sp-8) var(--sp-4)}.placeholder .emoji{font-size:2.5rem}.role-page{min-height:100dvh;padding:var(--sp-6) var(--sp-4);place-items:center;display:grid}.role-main{width:min(100%,980px)}.role-head{margin-bottom:var(--sp-5)}.role-brand{color:var(--ss-snap);font-size:var(--fs-2xl);font-weight:800;line-height:1}.role-brand span{color:var(--ss-sort)}.role-head h1{margin-top:var(--sp-4);font-size:var(--fs-xl)}.role-head p{margin-top:var(--sp-2);color:var(--ss-muted);max-width:620px}.role-grid{gap:var(--sp-4);grid-template-columns:repeat(auto-fit,minmax(210px,1fr));display:grid}.role-card{gap:var(--sp-3);min-height:190px;padding:var(--sp-5);border:1px solid var(--ss-line);border-radius:var(--ss-radius);background:var(--ss-surface);box-shadow:var(--ss-shadow);color:var(--ss-ink);flex-direction:column;text-decoration:none;display:flex}.role-card:hover{border-color:var(--ss-sort)}.role-card.primary{border-color:#f9731666}.role-card-kicker{color:var(--ss-muted);font-size:var(--fs-sm);font-weight:700}.role-card-title{font-size:var(--fs-lg);font-weight:800}.role-card-body{color:var(--ss-ink-soft);flex:1;line-height:1.65}.role-card-action{color:var(--ss-sort);font-weight:800}.login-title{margin:calc(-1 * var(--sp-3)) 0 var(--sp-4);font-size:var(--fs-lg)}.login-switch{justify-content:center;gap:var(--sp-2) var(--sp-3);margin-top:var(--sp-4);font-size:var(--fs-sm);flex-wrap:wrap;display:flex}.login-switch a{color:var(--ss-muted);font-weight:600}.login-switch a:hover{color:var(--ss-sort)}@media (width<=760px){.role-page{place-items:start stretch}.role-grid{grid-template-columns:1fr}.role-card{min-height:0}}.quiz{gap:var(--sp-4);flex-direction:column;display:flex}.quiz-timerbar{z-index:10;background:var(--ss-line);border-radius:999px;height:6px;position:sticky;top:0;overflow:hidden}.quiz-timerbar>.fill{background:var(--ss-snap);transform-origin:0;will-change:transform;width:100%;height:100%}.quiz-timerbar.low>.fill{background:var(--ss-bad)}.quiz-meta{align-items:center;gap:var(--sp-3);font-size:var(--fs-sm);color:var(--ss-muted);display:flex}.quiz-meta .badge{border-radius:999px;align-items:center;padding:2px 10px;font-size:.78rem;font-weight:700;display:inline-flex}.badge.review{background:var(--ss-sort-600);color:#fff}.badge.retry{background:var(--ss-snap);color:#fff}.badge.new{color:var(--ss-sort-600);background:#e0e7ff}.quiz-meta .spacer{flex:1}.quiz-meta .count{font-variant-numeric:tabular-nums}.quiz-stem{font-size:var(--fs-lg);color:var(--ss-ink);font-weight:600;line-height:1.5}.quiz-figure{margin:var(--sp-3) 0;justify-content:center;display:flex}.quiz-figure .stem-img{object-fit:contain;background:#fff;border-radius:8px;max-width:min(100%,340px);height:auto;max-height:min(46vh,420px);display:block}.quiz-image-error{width:100%;min-height:120px;padding:var(--sp-3);border:1.5px dashed var(--ss-line-strong);color:var(--ss-muted);font-size:var(--fs-sm);background:#fff;border-radius:8px;place-items:center;display:grid}.quiz-choices{gap:var(--sp-3);flex-direction:column;display:flex}.choice{align-items:flex-start;gap:var(--sp-3);min-height:var(--tap);padding:var(--sp-3) var(--sp-4);border:1.5px solid var(--ss-line-strong);border-radius:var(--ss-radius);cursor:pointer;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;background:#fff;transition:border-color .12s,background .12s,box-shadow .12s;display:flex}.choice:hover{border-color:var(--ss-sort)}.choice input{opacity:0;width:1px;height:1px;position:absolute}.choice .marker{border:2px solid var(--ss-line-strong);flex:none;place-items:center;width:22px;height:22px;margin-top:2px;transition:border-color .12s,background .12s;display:grid}.choice.single .marker{border-radius:50%}.choice.multi .marker{border-radius:6px}.choice .marker:after{content:"";opacity:0;transition:opacity .1s}.choice.single .marker:after{background:#fff;border-radius:50%;width:10px;height:10px}.choice.multi .marker:after{border:3px solid #fff;border-width:0 3px 3px 0;width:6px;height:11px;transform:rotate(45deg)translateY(-1px)}.choice .label{font-size:var(--fs-base);flex:1;padding-top:1px;line-height:1.45}.choice.selected{border-color:var(--ss-sort);box-shadow:0 0 0 1px var(--ss-sort) inset;background:#eff4ff}.choice.selected .marker{border-color:var(--ss-sort);background:var(--ss-sort)}.choice.selected .marker:after{opacity:1}.quiz-choices.locked .choice{cursor:default;pointer-events:none}.choice.correct{border-color:var(--ss-ok);background:var(--ss-ok-bg);box-shadow:0 0 0 1px var(--ss-ok) inset}.choice.correct .marker{border-color:var(--ss-ok);background:var(--ss-ok)}.choice.wrong{border-color:var(--ss-bad);background:var(--ss-bad-bg);box-shadow:0 0 0 1px var(--ss-bad) inset}.choice.wrong .marker{border-color:var(--ss-bad);background:var(--ss-bad)}.choice .tick{flex:none;font-size:1.1em;font-weight:800}.choice.correct .tick{color:var(--ss-ok)}.choice.wrong .tick{color:var(--ss-bad)}.quiz-dunno{margin-top:var(--sp-1)}.btn-dunno{width:100%;min-height:var(--tap);border:1.5px dashed var(--ss-line-strong);border-radius:var(--ss-radius);color:var(--ss-ink-soft);background:#fff;font-weight:600}.btn-dunno:hover{border-color:var(--ss-dunno);color:var(--ss-dunno);background:var(--ss-dunno-bg)}.quiz-actions{padding-top:var(--sp-3);padding-bottom:calc(var(--sp-2) + env(safe-area-inset-bottom));background:linear-gradient(180deg, #f7f8fa00 0%, var(--ss-bg) 35%);position:sticky;bottom:0}.quiz-actions.result{background:0 0;position:static}.feedback{border-radius:var(--ss-radius);padding:var(--sp-4);border:1.5px solid;animation:.18s ease-out fb-in}@keyframes fb-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.feedback .verdict{align-items:center;gap:var(--sp-2);font-weight:800;font-size:var(--fs-lg);display:flex}.feedback .explain{margin-top:var(--sp-2);color:var(--ss-ink-soft);font-size:var(--fs-base);line-height:1.5}.feedback .explain-more{margin-top:var(--sp-3);padding-top:var(--sp-3);border-top:1px dashed var(--ss-line-strong)}.feedback .explain-more-lead{font-size:var(--fs-sm);color:var(--ss-ink-soft);margin-bottom:var(--sp-1);font-weight:700}.feedback .explain-more .explain{margin-top:0}.feedback.ok{border-color:var(--ss-ok);background:var(--ss-ok-bg)}.feedback.ok .verdict{color:var(--ss-ok)}.feedback.bad{border-color:var(--ss-bad);background:var(--ss-bad-bg)}.feedback.bad .verdict{color:var(--ss-bad)}.feedback.warn{border-color:var(--ss-warn);background:var(--ss-warn-bg)}.feedback.warn .verdict{color:var(--ss-warn)}.feedback.dunno{border-color:var(--ss-dunno);background:var(--ss-dunno-bg)}.feedback.dunno .verdict{color:var(--ss-dunno)}.quiz-done{text-align:center;padding:var(--sp-6) var(--sp-3)}.quiz-done .big{font-size:3rem}.quiz-done h2{margin:var(--sp-3) 0;font-size:var(--fs-xl)}.quiz-done .summary{gap:var(--sp-6);margin:var(--sp-4) 0 var(--sp-6);display:inline-flex}.choice.ordering{text-align:left;width:100%;font:inherit;color:inherit;align-items:center}.choice.ordering .ord-badge{border:2px solid var(--ss-line-strong);width:26px;height:26px;color:var(--ss-muted);border-radius:50%;flex:none;place-items:center;font-size:.85rem;font-weight:800;display:grid}.choice.ordering.picked{border-color:var(--ss-sort);background:#eff4ff}.choice.ordering.picked .ord-badge{border-color:var(--ss-sort);background:var(--ss-sort);color:#fff}.quiz-choices.ordering.answered .choice{pointer-events:none}.quiz-choices.matching{gap:0}.matching-board{gap:var(--sp-3);grid-template-columns:minmax(0,1fr) minmax(0,1fr);width:100%;min-width:0;display:grid}.matching-column{align-content:start;gap:var(--sp-3);min-width:0;display:grid}.matching-option{align-items:center;gap:var(--sp-2);width:100%;min-width:0;min-height:var(--tap);padding:var(--sp-3);border:1.5px solid var(--ss-line-strong);border-radius:var(--ss-radius);color:var(--ss-ink);font:inherit;text-align:left;cursor:pointer;touch-action:manipulation;background:#fff;grid-template-columns:28px minmax(0,1fr);transition:border-color .12s,background .12s,box-shadow .12s;display:grid}.matching-option:hover,.matching-option:focus-visible{border-color:var(--ss-sort)}.matching-option.active{border-color:var(--ss-sort);box-shadow:0 0 0 1px var(--ss-sort) inset;background:#eff4ff}.matching-badge{border:2px solid var(--ss-line-strong);color:#fff;border-radius:50%;place-items:center;width:28px;height:28px;font-size:.82rem;font-weight:800;display:grid}.matching-label{overflow-wrap:anywhere;min-width:0;line-height:1.45}.matching-option.paired[data-pair-index="0"] .matching-badge{background:#2563eb;border-color:#2563eb}.matching-option.paired[data-pair-index="1"] .matching-badge{background:#0f766e;border-color:#0f766e}.matching-option.paired[data-pair-index="2"] .matching-badge{background:#c2410c;border-color:#c2410c}.matching-option.paired[data-pair-index="3"] .matching-badge{background:#a21caf;border-color:#a21caf}.matching-option.paired{border-color:var(--ss-sort)}.quiz-choices.matching.locked .matching-option,.quiz-choices.matching.answered .matching-option{pointer-events:none;cursor:default}.matching-option.correct{border-color:var(--ss-ok);background:var(--ss-ok-bg);box-shadow:0 0 0 1px var(--ss-ok) inset}.matching-option.wrong{border-color:var(--ss-bad);background:var(--ss-bad-bg);box-shadow:0 0 0 1px var(--ss-bad) inset}.matching-option.correct-target{border-color:var(--ss-ok);background:var(--ss-ok-bg);border-style:dashed}.matching-result{padding-top:var(--sp-1);color:var(--ss-bad);font-size:var(--fs-sm);grid-column:1/-1;font-weight:700}.matching-option.correct .matching-result{color:var(--ss-ok)}.quiz-cloze{font-size:var(--fs-lg);color:var(--ss-ink);flex-wrap:wrap;align-items:center;gap:8px 4px;line-height:2.1;display:flex}.cloze-text{white-space:pre-wrap}.cloze-text.cloze-block{flex:1 0 100%;line-height:1.7}.cloze-dd{vertical-align:middle;display:inline-block;position:relative}.cloze-dd-trigger{border:1.5px solid var(--ss-sort);min-width:64px;min-height:40px;font:inherit;color:var(--ss-ink);text-align:left;cursor:pointer;touch-action:manipulation;background:#fff7ed;border-radius:8px;padding:4px 30px 4px 12px;font-weight:700;position:relative}.cloze-dd-trigger:after{content:"▾";color:var(--ss-sort);font-weight:400;position:absolute;top:50%;right:10px;transform:translateY(-50%)}.cloze-dd.open .cloze-dd-trigger,.cloze-dd-trigger:hover{border-color:var(--ss-snap)}.cloze-dd-val.placeholder:before{content:"选择";color:var(--ss-muted);font-weight:400}.cloze-dd-menu{z-index:50;-webkit-overflow-scrolling:touch;border:1.5px solid var(--ss-line-strong);min-width:100%;max-height:260px;box-shadow:var(--ss-shadow);background:#fff;border-radius:10px;flex-direction:column;gap:2px;padding:5px;display:flex;position:absolute;top:calc(100% + 4px);left:0;overflow-y:auto}.cloze-dd-menu[hidden]{display:none}.cloze-dd-opt{min-height:40px;font:inherit;color:var(--ss-ink);text-align:left;white-space:nowrap;cursor:pointer;touch-action:manipulation;background:0 0;border:none;border-radius:7px;padding:7px 14px}.cloze-dd-opt:hover{background:#f0f4ff}.cloze-dd-opt.sel{background:#fff0e6;font-weight:700}.quiz-cloze.locked .cloze-dd-trigger{pointer-events:none;opacity:.85}.quiz-choices.imagepick{gap:var(--sp-3);grid-template-columns:1fr 1fr;display:grid}.choice.img{text-align:center;flex-direction:column;align-items:stretch}.choice.img .choice-img{aspect-ratio:4/3;object-fit:contain;background:#fff;border-radius:8px;width:100%;height:auto;margin:4px 0;display:block}.shell-main.tch-wide{max-width:1320px}.shell-main:has(>.tch){max-width:1320px}.shell-main.tch-wide{width:min(100%,1120px);max-width:100%}.tch-tabs{gap:var(--sp-2);border-bottom:1px solid var(--ss-line);margin-bottom:var(--sp-5);-webkit-overflow-scrolling:touch;display:flex;overflow:auto hidden}.tch-tab{padding:var(--sp-3) var(--sp-4);color:var(--ss-muted);font-weight:600;font-size:var(--fs-base);white-space:nowrap;border-bottom:2.5px solid #0000;flex:none;margin-bottom:-1px;text-decoration:none}.tch-tab:hover{color:var(--ss-ink)}.tch-tab.active{color:var(--ss-snap);border-bottom-color:var(--ss-snap)}.work-hero{justify-content:space-between;align-items:flex-start;gap:var(--sp-4);padding:var(--sp-5);margin-bottom:var(--sp-5);border:1px solid var(--ss-line);border-radius:var(--ss-radius);background:linear-gradient(#fff,#f9fafb);display:flex}.ia-hero{background:linear-gradient(#fff,#f8fbff)}.ia-kicker{font-size:var(--fs-sm);font-weight:800;margin:0 0 var(--sp-1)!important;color:var(--ss-sort-600)!important}.ia-chip{border:1px solid var(--ss-line);min-height:26px;color:var(--ss-ink-soft);white-space:nowrap;background:#fff;border-radius:999px;align-items:center;padding:0 9px;font-size:.78rem;font-weight:800;display:inline-flex}.ia-chip.snap{color:var(--ss-snap-600);background:#fff7ed;border-color:#fed7aa}.ia-chip.sort,.ia-chip.blue{color:var(--ss-sort-600);background:#eff6ff;border-color:#bfdbfe}.ia-chip.purple{background:var(--ss-dunno-bg);color:var(--ss-dunno);border-color:#ddd6fe}.ia-chip.green{background:var(--ss-ok-bg);color:var(--ss-ok);border-color:#bbf7d0}.role-workspace{gap:var(--sp-5);display:grid}.role-page-head{gap:var(--sp-3);margin-bottom:var(--sp-4);display:grid}.role-hero{gap:var(--sp-4);padding:var(--sp-5);border:1px solid var(--ss-line);background:#fff;border-radius:8px;grid-template-columns:minmax(0,1fr) auto;align-items:end;display:grid}.role-kicker{margin:0 0 var(--sp-1);color:var(--ss-sort-600);font-size:var(--fs-sm);font-weight:800}.role-hero h2{font-size:var(--fs-xl);line-height:1.2}.role-hero-body{max-width:760px;margin-top:var(--sp-2);color:var(--ss-ink-soft);line-height:1.65}.role-hero-meta,.role-hero-actions{gap:var(--sp-2);margin-top:var(--sp-3);flex-wrap:wrap;display:flex}.role-hero-actions{justify-content:flex-end;align-self:center;margin-top:0}.role-chip,.ia-chip{border:1px solid var(--ss-line);min-height:26px;color:var(--ss-ink-soft);white-space:nowrap;background:#fff;border-radius:999px;align-items:center;padding:0 9px;font-size:.78rem;font-weight:800;display:inline-flex}.role-chip.snap,.role-chip.orange,.ia-chip.snap{color:var(--ss-snap-600);background:#fff7ed;border-color:#fed7aa}.role-chip.sort,.role-chip.blue,.ia-chip.sort,.ia-chip.blue{color:var(--ss-sort-600);background:#eff6ff;border-color:#bfdbfe}.role-chip.purple,.ia-chip.purple{background:var(--ss-dunno-bg);color:var(--ss-dunno);border-color:#ddd6fe}.role-chip.green,.ia-chip.green{background:var(--ss-ok-bg);color:var(--ss-ok);border-color:#bbf7d0}.role-chip.red{background:var(--ss-bad-bg);color:var(--ss-bad);border-color:#fecaca}.role-panel{min-width:0;margin-bottom:var(--sp-5)}.role-section-head{justify-content:space-between;align-items:center;gap:var(--sp-3);margin-bottom:var(--sp-3);display:flex}.role-section-head h3{font-size:var(--fs-lg)}.role-section-head p{font-size:var(--fs-sm);margin-top:2px}.role-action-grid{gap:var(--sp-3);grid-template-columns:repeat(auto-fit,minmax(220px,1fr));display:grid}.role-action-grid.dense{grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}.role-action-grid.compact{grid-template-columns:1fr}.role-action{gap:var(--sp-2);min-height:126px;padding:var(--sp-4);border:1px solid var(--ss-line);color:var(--ss-ink);background:#fff;border-radius:8px;flex-direction:column;text-decoration:none;display:flex}.role-action:hover{border-color:var(--ss-sort)}.role-action.snap{border-color:#fed7aa}.role-action.sort{border-color:#bfdbfe}.role-action.purple{border-color:#ddd6fe}.role-action-meta{color:var(--ss-muted);font-size:.78rem;font-weight:800}.role-action-title{font-size:var(--fs-base);font-weight:800}.role-action-body{color:var(--ss-ink-soft);font-size:var(--fs-sm);flex:1;line-height:1.55}.role-action-go{color:var(--ss-sort);font-size:var(--fs-sm);font-weight:800}.role-metric-strip{gap:var(--sp-3);margin-bottom:var(--sp-4);grid-template-columns:repeat(auto-fit,minmax(150px,1fr));display:grid}.role-metric{min-height:86px;padding:var(--sp-4);border:1px solid var(--ss-line);background:#fff;border-radius:8px}.role-metric b{color:var(--ss-ink);font-size:var(--fs-xl);font-variant-numeric:tabular-nums;line-height:1;display:block}.role-metric span{color:var(--ss-muted);font-size:var(--fs-sm);margin-top:5px;display:block}.role-metric.blue b{color:var(--ss-sort-600)}.role-metric.green b{color:var(--ss-ok)}.role-metric.purple b{color:var(--ss-dunno)}.role-metric.orange b{color:var(--ss-snap-600)}.role-metric.red b{color:var(--ss-bad)}.role-signal-card,.role-chapter-panel{box-shadow:none;border-radius:8px}.admin-command-grid{gap:var(--sp-4);grid-template-columns:minmax(240px,.82fr) minmax(0,1.18fr);align-items:stretch;display:grid}.admin-command-grid>.role-action-primary{background:#fff7ed;min-height:100%}.admin-view-panel,.admin-create,.admin-list-panel{padding:var(--sp-4);border:1px solid var(--ss-line);background:#fff;border-radius:8px}.admin-account-layout{gap:var(--sp-4);grid-template-columns:minmax(280px,360px) minmax(0,1fr);align-items:start;display:grid}.admin-account-layout .admin-create-grid{grid-template-columns:1fr}.admin-account-layout .admin-create{position:sticky;top:84px}.admin-list-panel .tch-table-wrap{box-shadow:none}.trainee-chapter-panel .chapter-open-head{margin-bottom:var(--sp-3)}.work-hero h2{font-size:var(--fs-xl)}.work-hero p{margin-top:var(--sp-2);color:var(--ss-ink-soft);line-height:1.65}.work-section{margin-bottom:var(--sp-5)}.work-section h3,.work-section-head h3{font-size:var(--fs-lg)}.work-section-head{justify-content:space-between;align-items:center;gap:var(--sp-3);margin-bottom:var(--sp-3);display:flex}.work-section-head p{font-size:var(--fs-sm);margin-top:2px}.work-grid{gap:var(--sp-3);grid-template-columns:repeat(auto-fit,minmax(220px,1fr));display:grid}.work-grid.compact{grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}.chapter-stack{gap:var(--sp-3);display:grid}.chapter-open-panel{border:1px solid var(--ss-line);border-radius:var(--ss-radius-sm);padding:var(--sp-3);background:#fff}.chapter-open-head{justify-content:space-between;align-items:flex-start;gap:var(--sp-3);margin-bottom:var(--sp-3);display:flex}.chapter-open-head h4{font-size:var(--fs-base);margin:0}.work-card{gap:var(--sp-2);min-height:146px;padding:var(--sp-4);border:1px solid var(--ss-line);border-radius:var(--ss-radius-sm);color:var(--ss-ink);box-shadow:var(--ss-shadow);background:#fff;flex-direction:column;text-decoration:none;display:flex}.decision-grid{gap:var(--sp-3);grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.decision-card,.chapter-panel,.chapter-metric,.chapter-work-tabs{border:1px solid var(--ss-line);border-radius:var(--ss-radius-sm);box-shadow:var(--ss-shadow);background:#fff}.decision-card{gap:var(--sp-2);min-height:208px;padding:var(--sp-4);flex-direction:column;display:flex}.decision-card h3{margin:var(--sp-1) 0 0;font-size:var(--fs-lg)}.decision-card p{color:var(--ss-ink-soft);font-size:var(--fs-sm);line-height:1.55}.signal-list{gap:var(--sp-1);margin-top:auto;display:grid}.chapter-work-tabs{gap:var(--sp-1);padding:var(--sp-2);margin-bottom:var(--sp-4);display:flex;overflow-x:auto}.chapter-work-tab{min-height:38px;padding:0 var(--sp-3);border-radius:var(--ss-radius-sm);color:var(--ss-ink-soft);font-weight:800;font-size:var(--fs-sm);flex:none;align-items:center;text-decoration:none;display:inline-flex}.chapter-work-tab:hover{background:var(--ss-bg);color:var(--ss-ink)}.chapter-work-tab.active{color:var(--ss-sort-600);background:#eff6ff}.chapter-inline-actions{gap:var(--sp-2);margin-top:var(--sp-3);flex-wrap:wrap;display:flex}.chapter-metric-grid{gap:var(--sp-3);margin-bottom:var(--sp-4);grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.chapter-metric{padding:var(--sp-4)}.chapter-metric b{color:var(--ss-ink);font-size:var(--fs-xl);font-variant-numeric:tabular-nums;line-height:1;display:block}.chapter-metric span{color:var(--ss-muted);font-size:var(--fs-sm);margin-top:4px;display:block}.chapter-overview-grid{gap:var(--sp-3);grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);display:grid}.chapter-panel{padding:var(--sp-4)}.chapter-miscon-list,.chapter-topic-list{gap:var(--sp-2);display:grid}.chapter-miscon-row{gap:var(--sp-3);padding:var(--sp-3) 0;border-top:1px solid var(--ss-line);grid-template-columns:minmax(0,1fr) minmax(96px,150px);align-items:start;display:grid}.chapter-miscon-row:first-child{border-top:0}.chapter-miscon-main b{line-height:1.35;display:block}.chapter-miscon-main p{color:var(--ss-ink-soft);font-size:var(--fs-sm);margin-top:5px;line-height:1.5}.chapter-miscon-side{color:var(--ss-muted);font-size:var(--fs-sm);gap:6px;font-weight:800;display:grid}.chapter-topic-row{padding:var(--sp-2) 0;color:var(--ss-ink);border-top:1px solid var(--ss-line);gap:3px;text-decoration:none;display:grid}.chapter-topic-row:first-child{border-top:0}.chapter-topic-row:hover .chapter-topic-title{color:var(--ss-sort)}.chapter-topic-title{font-weight:800}.work-card:hover{border-color:var(--ss-sort)}.work-card.snap{border-color:#f9731666}.work-card.sort{border-color:#2563eb59}.work-card-title{font-size:var(--fs-base);font-weight:800}.work-card-body{color:var(--ss-ink-soft);font-size:var(--fs-sm);flex:1;line-height:1.6}.work-card-go{color:var(--ss-sort);font-size:var(--fs-sm);font-weight:800}.trainee .work-hero{background:linear-gradient(#fff,#f5f3ff)}.trainee-flow{gap:var(--sp-2);margin:0 0 var(--sp-5);grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.flow-step{align-items:center;gap:var(--sp-2);min-height:54px;padding:var(--sp-3);border-radius:var(--ss-radius-sm);background:#fff;border:1px solid #ddd6fe;display:flex}.flow-step b{background:var(--ss-dunno-bg);width:28px;height:28px;color:var(--ss-dunno);font-size:var(--fs-sm);border-radius:8px;place-items:center;display:grid}.flow-step span{font-size:var(--fs-sm);font-weight:800}.tch-head{justify-content:space-between;align-items:flex-end;gap:var(--sp-3);margin-bottom:var(--sp-4);display:flex}.tch-head h2{font-size:var(--fs-xl)}.tch-head p{font-size:var(--fs-sm);margin-top:2px}.tch-subhead{margin:var(--sp-5) 0 var(--sp-3);font-size:var(--fs-lg)}.tch-back{font-size:var(--fs-sm);color:var(--ss-muted);font-weight:600;text-decoration:none;display:inline-block}.tch-back:hover{color:var(--ss-sort)}.tch-filters{gap:var(--sp-3);margin-bottom:var(--sp-4);flex-wrap:wrap;display:flex}.tch-filter{flex-direction:column;gap:4px;display:flex}.tch-filter-grow{flex:200px}.tch-filter-lbl{font-size:var(--fs-sm);color:var(--ss-muted);font-weight:600}.tch-select{min-height:40px;padding:0 var(--sp-3);border:1px solid var(--ss-line-strong);border-radius:var(--ss-radius-sm);color:var(--ss-ink);font:inherit;font-size:var(--fs-sm);background:#fff}.tch-select:focus{border-color:var(--ss-sort);outline:none;box-shadow:0 0 0 3px #2563eb26}.tch-search{min-height:40px}.tch-legend{gap:var(--sp-4);margin-bottom:var(--sp-3);font-size:var(--fs-sm);color:var(--ss-muted);flex-wrap:wrap;display:flex}.tch-legend-item{align-items:center;gap:6px;display:inline-flex}.tch-dot{border-radius:3px;width:10px;height:10px;display:inline-block}.tch-dot.wrong{background:var(--ss-bad)}.tch-dot.dunno{background:var(--ss-dunno)}.tch-dot.timeout{background:var(--ss-warn)}.tch-table-wrap{-webkit-overflow-scrolling:touch;border:1px solid var(--ss-line);border-radius:var(--ss-radius);background:var(--ss-surface);box-shadow:var(--ss-shadow);overflow-x:auto}.tch-table{border-collapse:collapse;width:100%;font-size:var(--fs-sm)}.tch-table thead th{text-align:left;color:var(--ss-ink-soft);padding:var(--sp-3) var(--sp-3);border-bottom:1px solid var(--ss-line);white-space:nowrap;background:#f9fafb;font-weight:700;position:sticky;top:0}.tch-table td{padding:var(--sp-3) var(--sp-3);border-bottom:1px solid var(--ss-line);vertical-align:middle}.tch-table tbody tr:last-child td{border-bottom:none}.tch-row.clickable{cursor:pointer}.tch-row.clickable:hover{background:#f7faff}.tch-row.disabled{opacity:.55}.tch-num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}.tch-cell-name{min-width:180px}.tch-table-wrap.tch-list{width:fit-content;max-width:100%}.tch-table-wrap.tch-list .tch-table{width:auto}.tch-table-wrap.tch-list .tch-cell-name{min-width:0}.tch-topic-name,.tch-student-name{color:var(--ss-ink);font-weight:600}.tch-topic-chap,.tch-qtype,.tch-student-meta{margin-top:2px;font-size:.78rem}.tch-chev{color:var(--ss-line-strong);text-align:center;width:1.5em;font-size:1.3em}.tch-time{white-space:nowrap;font-size:.8rem}.tch-stem{color:var(--ss-ink);display:block}.tch-stem.clamp{-webkit-line-clamp:2;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}.tch-report-ctx{margin:var(--sp-2) 0;padding:var(--sp-2) var(--sp-3);border-radius:var(--ss-radius);border:1px solid var(--ss-line);background:#f7f8fa}.tch-report-attempt{font-size:var(--fs-base);line-height:1.7}.tch-report-attempt .ra-lbl{color:var(--ss-muted);font-size:var(--fs-sm);margin-right:4px}.tch-report-attempt .ra-val{font-weight:600}.tch-report-attempt .ra-sep{color:var(--ss-line-strong);margin:0 4px}.tch-report-attempt .ra-mark{font-weight:700;font-size:var(--fs-sm)}.tch-report-attempt .ra-mark.ok{color:var(--ss-ok)}.tch-report-attempt .ra-mark.bad{color:var(--ss-bad)}.tch-report-stat{font-size:var(--fs-sm);margin-top:2px}.tch-report-hint{margin-top:var(--sp-2);font-size:var(--fs-sm);border-radius:8px;padding:6px 10px;font-weight:600}.tch-report-hint.bug{background:var(--ss-bad-bg);color:var(--ss-bad);border:1px solid var(--ss-bad)}.tch-report-hint.device{background:var(--ss-warn-bg);color:var(--ss-warn)}.tch-report-hint.ok{background:var(--ss-ok-bg);color:var(--ss-ok)}.tch-report-hint.confusion{background:var(--ss-dunno-bg);color:var(--ss-dunno);border:1px solid #ddd6fe}.tch-report-note{margin:var(--sp-2) 0;border-left:3px solid var(--ss-sort);color:var(--ss-ink);font-size:var(--fs-sm);background:#eff6ff;border-radius:8px;padding:8px 10px;line-height:1.55}.tch-reply-toggle{border:1px dashed var(--ss-line-strong);color:var(--ss-ink-soft);font:inherit;font-size:var(--fs-sm);cursor:pointer;background:0 0;border-radius:8px;padding:7px 12px}.tch-reply-toggle:hover{border-color:var(--ss-sort);color:var(--ss-sort)}.tch-reply-box{margin:var(--sp-2) 0}.tch-reply-box[hidden]{display:none}.tch-reply-hint{font-size:var(--fs-sm);margin-bottom:4px}.tch-reply-area{border:1.5px solid var(--ss-line-strong);width:100%;font:inherit;font-size:var(--fs-base);resize:vertical;box-sizing:border-box;border-radius:8px;padding:8px 10px;line-height:1.5}.tch-replied{margin:var(--sp-2) 0;background:var(--ss-ok-bg);font-size:var(--fs-sm);color:var(--ss-ink-soft);border-radius:8px;padding:8px 12px}.tch-rate{flex-direction:column;gap:4px;min-width:76px;display:flex}.tch-rate-val{font-variant-numeric:tabular-nums;font-weight:600}.tch-bar{background:var(--ss-line);border-radius:999px;height:6px;display:block;overflow:hidden}.tch-bar-fill{background:var(--ss-line-strong);border-radius:999px;height:100%;display:block}.tch-bar.wrong .tch-bar-fill{background:var(--ss-bad)}.tch-bar.dunno .tch-bar-fill{background:var(--ss-dunno)}.tch-bar.timeout .tch-bar-fill{background:var(--ss-warn)}.tch-bar.ok .tch-bar-fill{background:var(--ss-ok)}.tch-blind-val{font-variant-numeric:tabular-nums;color:var(--ss-snap-600);font-weight:800}.tch-blind-val.dim{color:var(--ss-muted)}.tch-low{background:var(--ss-line);color:var(--ss-muted);vertical-align:middle;border-radius:999px;margin-left:6px;padding:1px 6px;font-size:.68rem;font-weight:700;display:inline-block}.tch-pill{white-space:nowrap;border-radius:999px;padding:2px 9px;font-size:.74rem;font-weight:700;display:inline-block}.tch-pill.ok{background:var(--ss-ok-bg);color:var(--ss-ok)}.tch-pill.bad{background:var(--ss-bad-bg);color:var(--ss-bad)}.tch-pill.off{background:var(--ss-line);color:var(--ss-muted)}.tch-pill.teacher{background:var(--ss-dunno-bg);color:var(--ss-dunno)}.ok-text{color:var(--ss-ok)}.bad-text{color:var(--ss-bad)}.dunno-text{color:var(--ss-dunno)}.tch-due{font-variant-numeric:tabular-nums}.tch-due.hot{color:var(--ss-snap-600);font-weight:800}.tch-qcard{margin-bottom:var(--sp-4)}.tch-qcard .tch-stem{font-size:var(--fs-lg);font-weight:600;line-height:1.5}.tch-explain{margin-top:var(--sp-3);padding-top:var(--sp-3);border-top:1px dashed var(--ss-line);color:var(--ss-ink-soft);font-size:var(--fs-sm);line-height:1.6}.tch-explain-lbl{color:var(--ss-muted);font-weight:700}.tch-statrow{gap:var(--sp-3);margin-bottom:var(--sp-4);grid-template-columns:repeat(auto-fit,minmax(130px,1fr));display:grid}.tch-statbox{padding:var(--sp-4) var(--sp-2);background:var(--ss-surface);border:1px solid var(--ss-line);border-radius:var(--ss-radius);flex-direction:column;align-items:center;gap:2px;display:flex}.tch-statnum{font-size:var(--fs-xl);font-variant-numeric:tabular-nums;font-weight:800;line-height:1}.tch-statnum.ok{color:var(--ss-ok)}.tch-statnum.dunno{color:var(--ss-dunno)}.tch-statnum.bad{color:var(--ss-bad)}.tch-statlbl{font-size:var(--fs-sm)}.tch-diagnostic-list{gap:var(--sp-3);margin-bottom:var(--sp-4);flex-direction:column;display:flex}.tch-diagnostic-item{gap:var(--sp-3);padding:var(--sp-3) var(--sp-4);background:var(--ss-surface);border:1px solid var(--ss-line);border-radius:var(--ss-radius);grid-template-columns:34px minmax(0,1fr);display:grid}.tch-diagnostic-rank{background:var(--ss-bad-bg);width:28px;height:28px;color:var(--ss-bad);font-variant-numeric:tabular-nums;border-radius:50%;place-items:center;font-weight:800;display:grid}.tch-diagnostic-main{min-width:0}.tch-diagnostic-title{justify-content:space-between;align-items:baseline;gap:var(--sp-3);margin-bottom:var(--sp-2);font-weight:800;display:flex}.tch-diagnostic-count{color:var(--ss-muted);font-size:var(--fs-sm);font-variant-numeric:tabular-nums;flex:none;font-weight:700}.tch-diagnostic-meaning{margin-top:var(--sp-2);color:var(--ss-ink-soft);font-size:var(--fs-sm);line-height:1.55}.tch-diagnostic-topics{gap:var(--sp-2);margin-top:var(--sp-2);flex-wrap:wrap;display:flex}.tch-topic-pill{background:var(--ss-bg);min-height:26px;color:var(--ss-ink-soft);font-size:var(--fs-sm);border-radius:999px;align-items:center;padding:0 10px;text-decoration:none;display:inline-flex}.tch-topic-pill:hover{color:var(--ss-ink)}.tch-inline-miscon{margin-right:var(--sp-2);display:inline-block}.tch-distractors{gap:var(--sp-3);flex-direction:column;display:flex}.tch-distractor{padding:var(--sp-3) var(--sp-4);background:var(--ss-surface);border:1px solid var(--ss-line);border-radius:var(--ss-radius)}.tch-distractor-top{align-items:center;gap:var(--sp-2);margin-bottom:var(--sp-2);display:flex}.tch-choicekey{background:var(--ss-bad-bg);width:26px;height:26px;color:var(--ss-bad);border-radius:50%;flex:none;place-items:center;font-size:.85rem;font-weight:800;display:grid}.tch-choicelabel{flex:1;min-width:0}.tch-distractor-count{font-size:var(--fs-sm);flex:none;align-items:baseline;gap:5px;display:flex}.tch-dval{font-variant-numeric:tabular-nums;font-weight:800}.tch-miscon{align-items:center;gap:var(--sp-2);margin-top:var(--sp-2);font-size:var(--fs-sm);color:var(--ss-ink-soft);display:flex}.tch-miscon-tag{background:var(--ss-warn-bg);color:var(--ss-warn);border-radius:999px;flex:none;padding:1px 8px;font-size:.72rem;font-weight:700}.tch-notice{align-items:flex-start;gap:var(--sp-2);padding:var(--sp-3) var(--sp-4);margin-bottom:var(--sp-4);background:var(--ss-warn-bg);border-radius:var(--ss-radius-sm);color:var(--ss-warn);font-size:var(--fs-sm);border:1px solid #fde68a;line-height:1.5;display:flex}.tch-notice-ico{flex:none;font-weight:800}.tch-timeline{padding:0 0 0 var(--sp-4);margin:0;list-style:none;position:relative}.tch-timeline:before{content:"";background:var(--ss-line);width:2px;position:absolute;top:6px;bottom:6px;left:6px}.tch-tl-item{padding:0 0 var(--sp-4) var(--sp-4);position:relative}.tch-tl-dot{background:var(--ss-line-strong);border:2px solid #fff;border-radius:50%;width:12px;height:12px;position:absolute;top:4px;left:-2px}.tch-tl-item.ok .tch-tl-dot{background:var(--ss-ok)}.tch-tl-item.bad .tch-tl-dot{background:var(--ss-bad)}.tch-tl-item.dunno .tch-tl-dot{background:var(--ss-dunno)}.tch-tl-item.warn .tch-tl-dot{background:var(--ss-warn)}.tch-tl-row1{align-items:center;gap:var(--sp-2);flex-wrap:wrap;display:flex}.tch-tl-verdict{font-weight:700;font-size:var(--fs-sm)}.tch-tl-verdict.ok{color:var(--ss-ok)}.tch-tl-verdict.bad{color:var(--ss-bad)}.tch-tl-verdict.dunno{color:var(--ss-dunno)}.tch-tl-verdict.warn{color:var(--ss-warn)}.tch-tl-mode{background:var(--ss-line);color:var(--ss-ink-soft);border-radius:999px;padding:1px 8px;font-size:.72rem;font-weight:700}.tch-tl-chosen{font-size:var(--fs-sm);color:var(--ss-muted)}.tch-tl-time{margin-top:2px;font-size:.78rem}.tch-tl-tags{flex-wrap:wrap;gap:6px;margin-top:6px;display:flex}.tch-tl-tag{background:var(--ss-bad-bg);color:var(--ss-bad);border-radius:999px;padding:1px 8px;font-size:.72rem;font-weight:600}.tch-toolbar{gap:var(--sp-3);margin-bottom:var(--sp-4);grid-template-columns:repeat(auto-fit,minmax(260px,1fr));display:grid}.tch-toolitem{justify-content:space-between;align-items:center;gap:var(--sp-3);padding:var(--sp-3) var(--sp-4);background:var(--ss-surface);border:1px solid var(--ss-line);border-radius:var(--ss-radius);display:flex}.tch-toolitem-title{font-weight:700}.tch-toolitem-sub{font-size:var(--fs-sm);margin-top:2px}.tch-toolitem-danger{border-color:var(--ss-bad);background:var(--ss-bad-bg)}.tch-btn-danger{background:var(--ss-bad);color:#fff;border:none;flex:none}.tch-btn-danger:hover:not(:disabled){filter:brightness(.94)}.tch-btn-danger:disabled{opacity:.5;cursor:not-allowed}.tch-seclink{color:var(--ss-bad);cursor:pointer;text-decoration:underline}.tch-seclink:hover{filter:brightness(.9)}.tch-switch{background:var(--ss-line-strong);border:none;border-radius:999px;flex:none;width:46px;height:26px;transition:background .15s;position:relative}.tch-switch.on{background:var(--ss-ok)}.tch-switch-knob{background:#fff;border-radius:50%;width:20px;height:20px;transition:transform .15s;position:absolute;top:3px;left:3px;box-shadow:0 1px 2px #00000040}.tch-switch.on .tch-switch-knob{transform:translate(20px)}.tch-actions{gap:var(--sp-2);white-space:nowrap;display:flex}.tch-mini{min-height:32px;padding:0 var(--sp-3);border:1px solid var(--ss-line-strong);border-radius:var(--ss-radius-sm);color:var(--ss-ink-soft);background:#fff;font-size:.8rem;font-weight:600}.tch-mini:hover{border-color:var(--ss-sort);color:var(--ss-sort)}.tch-mini-danger{color:var(--ss-bad);border-color:var(--ss-bad)}.tch-mini-danger:hover{background:var(--ss-bad-bg);border-color:var(--ss-bad);color:var(--ss-bad)}.tch-nowrap{white-space:nowrap}.tch-table-accounts th,.tch-table-accounts td{white-space:nowrap;padding-top:var(--sp-2);padding-bottom:var(--sp-2)}.tch-table-accounts td.tch-actions{white-space:nowrap;display:table-cell}.tch-table-accounts td.tch-actions .tch-mini{vertical-align:middle}.tch-table-accounts td.tch-actions .tch-mini+.tch-mini{margin-left:var(--sp-2)}.tch-modal-overlay{z-index:50;padding:var(--sp-4);background:#10182873;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.tch-modal{width:100%;max-width:420px;max-height:calc(100vh - var(--sp-8));background:var(--ss-surface);border-radius:var(--ss-radius);box-shadow:var(--ss-shadow-lg);padding:var(--sp-5);overflow:auto}.tch-modal h3{font-size:var(--fs-lg)}.tch-modal .field{margin-bottom:var(--sp-3)}.tch-modal .field>label{font-size:var(--fs-sm);color:var(--ss-ink-soft);margin-bottom:4px;font-weight:600;display:block}.tch-applyrow{align-items:flex-start;gap:var(--sp-2);margin:var(--sp-3) 0;font-size:var(--fs-sm);color:var(--ss-ink-soft);cursor:pointer;display:flex}.tch-chk{width:18px;height:18px;accent-color:var(--ss-sort);flex:none;margin-top:2px}.tch-modal-actions{justify-content:flex-end;gap:var(--sp-2);margin-top:var(--sp-4);display:flex}.roster-ai-panel-head{align-items:center}.roster-ai-panel-head .btn{white-space:nowrap;min-width:112px}.roster-ai-panel-head p{margin-top:4px;line-height:1.6}.roster-ai-modal{max-width:860px}.roster-ai-note{margin-top:var(--sp-2);margin-bottom:var(--sp-4);line-height:1.6}.roster-ai-input{resize:vertical;width:100%;min-height:180px;padding-top:var(--sp-3);padding-bottom:var(--sp-3);line-height:1.55}.roster-ai-state{margin-top:var(--sp-2);font-size:var(--fs-sm);font-weight:700}.roster-ai-state.ok{color:var(--ss-ok)}.roster-ai-state.bad{color:var(--ss-bad)}.roster-ai-preview{margin-top:var(--sp-4)}.roster-ai-questions{border:1px solid var(--ss-line);border-radius:var(--ss-radius-sm);padding:var(--sp-3);margin-bottom:var(--sp-3);color:var(--ss-ink-soft);font-size:var(--fs-sm);background:#fff}.roster-ai-questions ul{margin:var(--sp-2) 0 0;padding-left:1.2em}.roster-ai-table-wrap{max-height:320px;overflow:auto}.roster-ai-row-msg{white-space:normal;max-width:220px;margin-top:4px}.roster-ai-actions{flex-wrap:wrap}.tch-toast-host{left:50%;bottom:calc(var(--sp-5) + env(safe-area-inset-bottom));z-index:60;gap:var(--sp-2);pointer-events:none;flex-direction:column;display:flex;position:fixed;transform:translate(-50%)}.tch-toast{padding:var(--sp-3) var(--sp-4);border-radius:var(--ss-radius-sm);box-shadow:var(--ss-shadow-lg);font-size:var(--fs-sm);color:#fff;font-weight:600;animation:.18s ease-out tch-toast-in}.tch-toast.ok{background:var(--ss-ok)}.tch-toast.bad{background:var(--ss-bad)}@keyframes tch-toast-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.tch-materials{margin-bottom:var(--sp-5)}.tch-materials-head{margin-bottom:var(--sp-3)}.tch-materials-head h3{font-size:var(--fs-lg)}.tch-materials-head p{font-size:var(--fs-sm);margin-top:2px}.tch-material-grid{gap:var(--sp-3);grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.tch-material-link{min-width:0;padding:var(--sp-3);border:1px solid var(--ss-line);border-radius:var(--ss-radius-sm);color:var(--ss-ink);background:#fff;text-decoration:none}.tch-material-link:hover{border-color:var(--ss-sort);box-shadow:var(--ss-shadow-sm)}.tch-material-link strong,.tch-material-link span,.tch-material-link b{display:block}.tch-material-link span{color:var(--ss-muted);font-size:var(--fs-sm);margin-top:4px;line-height:1.5}.tch-material-link b{margin-top:var(--sp-3);color:var(--ss-sort-600);font-size:var(--fs-sm)}.tch-dcard-list{gap:var(--sp-3);grid-template-columns:repeat(auto-fit,minmax(320px,1fr));display:grid}.tch-dcard,.tch-training-card{border:1px solid var(--ss-line);border-radius:var(--ss-radius-sm);padding:var(--sp-4);box-shadow:var(--ss-shadow-sm);background:#fff}.tch-dcard-top{justify-content:space-between;align-items:flex-start;gap:var(--sp-3);display:flex}.tch-dcard-kicker,.tch-training-progress{color:var(--ss-ink-soft);font-size:var(--fs-xs);margin-bottom:4px;font-weight:800}.tch-dcard-stem{color:var(--ss-ink);font-size:var(--fs-md);font-weight:800;line-height:1.55;display:block}.tch-dcard-figure{object-fit:contain;width:min(100%,420px);max-height:280px;margin:var(--sp-3) auto 0;display:block}.tch-dcard-intent,.tch-dcard-understanding{margin-top:var(--sp-3);color:var(--ss-ink-soft);font-size:var(--fs-sm);line-height:1.55}.tch-inline-label{margin-right:var(--sp-2);color:var(--ss-ink);font-weight:800;display:inline-block}.tch-card-stats{gap:var(--sp-2);margin-top:var(--sp-3);flex-wrap:wrap;display:flex}.tch-card-stats span{background:var(--ss-bg);color:var(--ss-ink-soft);font-size:var(--fs-xs);border-radius:999px;padding:3px 8px;font-weight:700}.tch-card-choices{gap:var(--sp-2);margin-top:var(--sp-3);display:grid}.tch-card-choice{gap:var(--sp-2);border:1px solid var(--ss-line);border-radius:var(--ss-radius-sm);padding:var(--sp-2);background:#fff;grid-template-columns:minmax(0,112px) 1fr;align-items:start;display:grid}.tch-card-choice.correct{background:#f0fdf4;border-color:#16a34a73}.tch-card-choice-img{aspect-ratio:4/3;object-fit:contain;border:1px solid var(--ss-line);background:#fff;border-radius:6px;width:112px}.tch-card-choice-main{min-width:0}.tch-card-choice-line{flex-wrap:wrap;align-items:baseline;gap:6px;display:flex}.tch-card-choice-label{font-weight:700;line-height:1.45}.tch-badge{font-size:var(--fs-xs);border-radius:999px;padding:2px 7px;font-weight:800}.tch-badge.ok{color:var(--ss-ok);background:var(--ss-ok-bg)}.tch-card-miscon{color:#9a3412;font-size:var(--fs-xs);background:#fff7ed;border-radius:999px;margin-top:6px;padding:3px 7px;font-weight:800;display:inline-block}.tch-card-meaning{color:var(--ss-ink-soft);font-size:var(--fs-xs);margin-top:5px;line-height:1.45}.tch-card-choice-rate{gap:var(--sp-2);color:var(--ss-ink-soft);font-size:var(--fs-xs);grid-template-columns:auto 1fr;align-items:center;margin-top:6px;display:grid}.tch-training-card{max-width:920px}.trainee-training-card{gap:var(--sp-4);display:grid}.trainee-step-card{gap:var(--sp-3);min-width:0;display:grid}.trainee-step-card+.trainee-step-card{padding-top:var(--sp-4);border-top:1px solid var(--ss-line)}.trainee-step-head{align-items:center;gap:var(--sp-2);flex-wrap:wrap;display:flex}.trainee-step-head h3{font-size:var(--fs-lg);line-height:1.2}.trainee-student-quiz .quiz-actions{background:0 0;padding-bottom:0;position:static}.trainee-predict-choices{gap:var(--sp-3);margin-top:0;display:grid}.trainee-predict-card .trainee-step-head{flex-direction:column;align-items:flex-start;gap:6px}.trainee-predict-choice{width:100%;min-height:58px;padding:var(--sp-3) var(--sp-4);align-items:flex-start}.trainee-predict-choice .label{min-width:0;line-height:1.55;display:block}.trainee-predict-card .tch-training-actions{justify-content:flex-start;margin-top:0}.tch-training-choices{gap:var(--sp-2);margin-top:var(--sp-3);grid-template-columns:repeat(auto-fit,minmax(210px,1fr));display:grid}.tch-training-choice{gap:var(--sp-2);border:1px solid var(--ss-line);border-radius:var(--ss-radius-sm);min-height:72px;padding:var(--sp-2);text-align:left;font:inherit;cursor:pointer;background:#fff;grid-template-columns:auto 1fr;align-items:center;display:grid}.tch-training-choice:hover,.tch-training-choice.selected{border-color:var(--ss-sort);background:#eff6ff}.tch-training-choice.correct{border-color:var(--ss-ok)}.tch-training-img{aspect-ratio:4/3;object-fit:contain;border:1px solid var(--ss-line);background:#fff;border-radius:6px;width:96px}.tch-training-reveal{margin-top:var(--sp-4);border-top:1px solid var(--ss-line);padding-top:var(--sp-4)}.tch-training-reveal h4{margin:0 0 var(--sp-3);font-size:var(--fs-lg)}.tch-training-verdict{margin-bottom:var(--sp-3);font-weight:800}.tch-training-verdict.ok{color:var(--ss-ok)}.tch-training-verdict.soft{color:var(--ss-ink-soft)}.tch-training-bars{gap:var(--sp-2);display:grid}.tch-training-barrow{gap:var(--sp-2);grid-template-columns:auto minmax(140px,1fr) auto minmax(80px,160px);align-items:center;display:grid}.tch-training-label{min-width:0;font-weight:700}.trainee-distribution-list{gap:var(--sp-3);display:grid}.trainee-distribution-row{gap:var(--sp-2);padding:var(--sp-3);border:1px solid var(--ss-line);border-radius:var(--ss-radius-sm);background:#fff;display:grid}.trainee-distribution-row.is-top{background:#fffaf5;border-color:#fed7aa}.trainee-distribution-main{gap:var(--sp-3);grid-template-columns:minmax(0,1fr) auto;align-items:start;display:grid}.trainee-distribution-label{min-width:0;font-weight:800;line-height:1.5}.trainee-distribution-meta{justify-content:flex-end;align-items:center;gap:var(--sp-2);min-width:max-content;display:inline-flex}.trainee-distribution-count{color:var(--ss-ink-soft);white-space:nowrap;font-weight:800}.trainee-distribution-tag{color:#9a3412;font-size:var(--fs-xs);white-space:nowrap;background:#ffedd5;border-radius:999px;padding:2px 8px;font-weight:900}.trainee-distribution-bar{min-width:0}.trainee-misconception-note{color:#9a3412;width:fit-content;max-width:100%;padding:var(--sp-2) var(--sp-3);font-size:var(--fs-sm);background:#fff7ed;border:1px solid #fed7aa;border-radius:8px;font-weight:700;line-height:1.5}.tch-reflect{width:100%;margin-top:var(--sp-3);border:1px solid var(--ss-line-strong);border-radius:var(--ss-radius-sm);padding:var(--sp-3);resize:vertical;font:inherit}.tch-training-actions{justify-content:flex-end;gap:var(--sp-2);margin-top:var(--sp-3);display:flex}.teacher-summary-grid{gap:var(--sp-3);grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.teacher-summary-block{border:1px solid var(--ss-line);border-radius:var(--ss-radius-sm);min-width:0;padding:var(--sp-3);background:#fff}.teacher-summary-block h4{margin:0 0 var(--sp-2);font-size:var(--fs-sm)}.teacher-summary-item{padding:var(--sp-2) 0;color:var(--ss-ink);border-top:1px solid var(--ss-line);gap:2px;text-decoration:none;display:grid}.teacher-summary-item:first-of-type{border-top:0}.teacher-summary-title{text-overflow:ellipsis;white-space:nowrap;min-width:0;font-weight:800;overflow:hidden}.teacher-summary-meta{color:var(--ss-muted);font-size:var(--fs-xs)}.admin-create-grid{gap:var(--sp-3);grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.admin-create-grid .field{margin:0}.admin-create-check{align-self:end;min-height:44px}.admin-create-actions{margin-top:var(--sp-3);justify-content:flex-end;display:flex}.teacher-student-management,.teacher-student-management>*,.teacher-student-management .role-section,.teacher-student-management .measure-hero,.teacher-student-management .role-section-head>div,.teacher-student-management .admin-create-grid,.teacher-student-management .field{min-width:0}.teacher-student-management .role-section,.teacher-student-management .measure-hero,.teacher-student-management .tch-table-wrap{max-width:100%}.teacher-student-management .tch-table-wrap.tch-list{width:100%}.teacher-student-management .tch-table-wrap.tch-list .tch-table{table-layout:fixed;width:100%;min-width:820px}.teacher-student-management .tch-table-accounts th:first-child,.teacher-student-management .tch-table-accounts td:first-child{width:18%}.teacher-student-management .tch-table-accounts th:nth-child(2),.teacher-student-management .tch-table-accounts td:nth-child(2){width:11%}.teacher-student-management .tch-table-accounts th:nth-child(3),.teacher-student-management .tch-table-accounts td:nth-child(3){width:28%}.teacher-student-management .tch-table-accounts th:nth-child(4),.teacher-student-management .tch-table-accounts td:nth-child(4){width:10%}.teacher-student-management .tch-table-accounts th:nth-child(5),.teacher-student-management .tch-table-accounts td:nth-child(5){width:15%}.teacher-student-management .tch-table-accounts th:nth-child(6),.teacher-student-management .tch-table-accounts td:nth-child(6){width:18%}.tch-training-save{gap:var(--sp-2);margin-top:var(--sp-2);flex-wrap:wrap;align-items:center;display:flex}.trainee-history-list{gap:var(--sp-2);display:grid}.trainee-history-row{gap:var(--sp-2);border-top:1px solid var(--ss-line);padding-top:var(--sp-2);grid-template-columns:auto auto minmax(0,1fr);align-items:center;display:grid}@media (width<=900px){.role-hero,.admin-command-grid,.admin-account-layout{grid-template-columns:1fr}.role-hero-actions{justify-content:flex-start}.admin-account-layout .admin-create{position:static}.decision-grid,.chapter-overview-grid,.tch-material-grid{grid-template-columns:1fr}.chapter-metric-grid,.trainee-flow{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=560px){.tch-head{flex-direction:column;align-items:flex-start}.tch-statrow,.tch-card-choice{grid-template-columns:1fr}.tch-card-choice-img,.tch-training-img{width:100%;max-height:180px}.tch-training-barrow{grid-template-columns:auto 1fr}.trainee-predict-choice{padding:var(--sp-3)}.trainee-distribution-main{gap:var(--sp-2);grid-template-columns:1fr}.trainee-distribution-meta{justify-content:flex-start}.trainee-misconception-note{width:100%}.teacher-summary-grid,.admin-create-grid,.decision-grid,.chapter-metric-grid,.role-metric-strip,.chapter-overview-grid,.trainee-flow{grid-template-columns:1fr}.role-section-head{flex-direction:column;align-items:flex-start}.chapter-miscon-row{grid-template-columns:1fr}.trainee-history-row{grid-template-columns:auto 1fr}}.teacher-measure-dashboard{gap:var(--sp-5);display:grid}.teacher-measure-head{padding-bottom:var(--sp-4);border-bottom:1px solid var(--ss-line)}.teacher-measure-kicker{margin-bottom:var(--sp-1);color:var(--ss-sort-600);font-size:var(--fs-sm);font-weight:800}.teacher-measure-head h2{font-size:var(--fs-xl)}.teacher-measure-head>p:last-child{max-width:780px;margin-top:var(--sp-2);color:var(--ss-ink-soft)}.measure-filters{margin:0}.measure-metric-grid{gap:var(--sp-3);grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.measure-metric{min-width:0;min-height:126px;padding:var(--sp-4);border:1px solid var(--ss-line);border-top:4px solid var(--ss-line-strong);background:#fff;border-radius:6px;flex-direction:column;justify-content:center;display:flex}.measure-metric.blue{border-top-color:var(--ss-sort)}.measure-metric.green{border-top-color:var(--ss-ok)}.measure-metric.purple{border-top-color:var(--ss-dunno)}.measure-metric.orange{border-top-color:var(--ss-warn)}.measure-metric strong{font-variant-numeric:tabular-nums;font-size:1.8rem;line-height:1.1}.measure-metric-label{margin-top:var(--sp-2);color:var(--ss-ink);font-weight:800}.measure-metric small{color:var(--ss-muted);margin-top:4px;line-height:1.35}.measure-two-column{gap:var(--sp-5);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.measure-panel{min-width:0;padding-top:var(--sp-4);border-top:1px solid var(--ss-line-strong)}.measure-panel-head{justify-content:space-between;align-items:baseline;gap:var(--sp-3);margin-bottom:var(--sp-4);display:flex}.measure-panel-head h3{font-size:var(--fs-lg)}.measure-panel-head p{color:var(--ss-muted);font-size:var(--fs-sm);text-align:right}.measure-composition{border:1px solid var(--ss-line);background:var(--ss-bg);border-radius:4px;width:100%;height:24px;display:flex;overflow:hidden}.measure-composition-segment{min-width:0;height:100%}.measure-composition-segment.correct,.measure-swatch.correct{background:var(--ss-ok)}.measure-composition-segment.wrong,.measure-swatch.wrong{background:var(--ss-bad)}.measure-composition-segment.dunno,.measure-swatch.dunno{background:var(--ss-dunno)}.measure-composition-segment.timeout,.measure-swatch.timeout{background:var(--ss-warn)}.measure-composition-legend{gap:var(--sp-2) var(--sp-4);margin-top:var(--sp-3);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.measure-composition-legend>div{gap:var(--sp-2);font-size:var(--fs-sm);grid-template-columns:10px 1fr auto;align-items:center;display:grid}.measure-swatch{border-radius:2px;width:10px;height:10px}.measure-histogram{gap:var(--sp-3);display:grid}.measure-histogram-row{gap:var(--sp-2);font-size:var(--fs-sm);grid-template-columns:72px minmax(0,1fr) 48px;align-items:center;display:grid}.measure-histogram-row strong{text-align:right;font-variant-numeric:tabular-nums}.measure-histogram-track{background:#eef2f7;border-radius:3px;height:12px;overflow:hidden}.measure-histogram-fill{background:var(--ss-sort);border-radius:3px;height:100%;display:block}.measure-scatter-wrap{gap:var(--sp-2);grid-template-rows:270px auto;grid-template-columns:auto minmax(0,1fr);min-width:0;display:grid}.measure-scatter-y{color:var(--ss-muted);font-size:var(--fs-xs);text-orientation:upright;white-space:nowrap;writing-mode:vertical-rl;align-self:center;font-weight:800;line-height:1.2}.measure-scatter{border-left:1px solid var(--ss-line-strong);border-bottom:1px solid var(--ss-line-strong);min-width:0;height:270px;margin:0 8px;position:relative}.measure-grid-line{border-top:1px dashed #d9dee7;position:absolute;left:0;right:0}.measure-grid-line small{color:var(--ss-muted);font-size:.7rem;position:absolute;bottom:2px;left:4px}.measure-point{background:var(--ss-sort);width:12px;height:12px;box-shadow:0 0 0 1px var(--ss-sort-600);border:2px solid #fff;border-radius:50%;position:absolute;transform:translate(-50%,50%)}.measure-point.dunno{background:var(--ss-dunno);box-shadow:0 0 0 1px #6d28d9}.measure-scatter-x{color:var(--ss-muted);font-size:var(--fs-xs);text-align:center;grid-column:2}.measure-topic-table-wrap{box-shadow:none;border-radius:6px}.measure-topic-table .tch-cell-name{min-width:220px}.measure-topic-id{font-size:var(--fs-xs);margin-top:2px}.measure-empty{min-height:96px;color:var(--ss-muted);place-items:center;display:grid}.measure-footnote{padding-top:var(--sp-3);border-top:1px solid var(--ss-line);color:var(--ss-muted);font-size:var(--fs-xs)}.learning-map{gap:var(--sp-5);min-width:0;display:grid}.learning-book{min-width:0}.learning-book-title{margin-bottom:var(--sp-3);font-size:var(--fs-lg)}.learning-chapter{width:100%;min-width:0;max-width:100%;margin-bottom:var(--sp-3);border:1px solid var(--ss-line);background:#fff;border-radius:6px;overflow:hidden}.learning-chapter>summary{justify-content:space-between;align-items:center;gap:var(--sp-3);padding:var(--sp-3) var(--sp-4);cursor:pointer;list-style:none;display:flex}.learning-chapter>summary::-webkit-details-marker{display:none}.learning-chapter>summary:after{content:"▸";color:var(--ss-muted);order:3}.learning-chapter[open]>summary:after{transform:rotate(90deg)}.learning-chapter-title{min-width:0;font-weight:800}.learning-chapter-meta{color:var(--ss-muted);font-size:var(--fs-xs);white-space:nowrap;margin-left:auto}.learning-table-wrap{border:0;border-top:1px solid var(--ss-line);width:100%;min-width:0;max-width:100%;box-shadow:none;border-radius:0}.learning-table{min-width:720px}.learning-section-row th{padding:var(--sp-2) var(--sp-3);border-top:1px solid var(--ss-line);border-bottom:1px solid var(--ss-line);color:var(--ss-ink);text-align:left;font-size:var(--fs-sm);background:#f3f5f8}.learning-section-row:first-child th{border-top:0}.learning-topic-name{gap:var(--sp-2);align-items:baseline;font-weight:700;display:flex}.learning-topic-no{color:var(--ss-muted);font-variant-numeric:tabular-nums;flex:0 0 1.5em}.learning-topic-id{font-size:var(--fs-xs);margin-top:2px}.tch-table-wrap.tch-list.tch-student-table-wrap{width:100%}.tch-table-wrap.tch-list .tch-student-table{width:100%;min-width:760px}.tch-student-sticky-head{display:none}@media (width>=761px){.tch-student-table-wrap{overflow:visible}.tch-student-table thead th{top:calc(env(safe-area-inset-top) + 60px);z-index:12;box-shadow:0 1px 0 var(--ss-line), 0 5px 10px #11182714;background:#f3f5f8}}@media (width<=760px){.tch-student-table-stage{position:relative}.tch-student-sticky-head{top:calc(env(safe-area-inset-top) + 60px);z-index:12;border:1px solid var(--ss-line);background:#f3f5f8;border-bottom:0;border-radius:6px 6px 0 0;width:100%;display:block;position:sticky;overflow:hidden;box-shadow:0 5px 10px #11182714}.tch-student-sticky-inner{will-change:transform;grid-template-columns:200px 70px 150px 95px 95px 120px 30px;width:760px;display:grid}.tch-student-sticky-cell{min-width:0;padding:var(--sp-3);color:var(--ss-ink-soft);font-size:var(--fs-sm);white-space:nowrap;font-weight:700}.tch-student-table thead{display:none}.tch-student-table{table-layout:fixed}.tch-student-table-wrap{border-radius:0 0 6px 6px}}@media (width<=900px){.measure-metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.measure-two-column{grid-template-columns:1fr}}@media (width<=560px){.measure-metric-grid{grid-template-columns:1fr}.measure-metric{min-height:108px}.measure-panel-head{display:block}.measure-panel-head p{text-align:left;margin-top:4px}.measure-composition-legend{grid-template-columns:1fr}.measure-scatter-wrap{grid-template-rows:220px auto}.measure-scatter{height:220px}.learning-chapter>summary{flex-wrap:wrap;align-items:flex-start}.learning-chapter-meta{order:4;width:100%;margin-left:0}}@media (width<=760px){.learning-book-title{margin-bottom:var(--sp-2);font-size:var(--fs-md)}.learning-chapter{overflow:visible}.learning-chapter>summary{padding:var(--sp-3)}.learning-table-wrap{background:#f8fafc;overflow:visible}.learning-table{width:100%;min-width:0;display:block}.learning-table thead,.learning-table tbody,.learning-table tr,.learning-table th,.learning-table td{display:block}.learning-table thead{display:none}.learning-table tbody{gap:var(--sp-2);padding:var(--sp-3);display:grid}.learning-section-row th{padding:var(--sp-2) 0 2px;color:var(--ss-ink-soft);font-size:var(--fs-sm);background:0 0;border:0}.learning-table .learning-topic-row{gap:var(--sp-2);padding:var(--sp-3);border:1px solid var(--ss-line);background:#fff;border-radius:6px;display:grid}.learning-topic-row td{border:0;padding:0}.learning-topic-row .tch-cell-name{min-width:0;padding-bottom:var(--sp-2);border-bottom:1px solid var(--ss-line)}.learning-topic-row td[data-label]{gap:var(--sp-2);grid-template-columns:84px minmax(0,1fr);align-items:center;min-width:0;display:grid}.learning-topic-row td[data-label]:before{content:attr(data-label);color:var(--ss-muted);font-size:var(--fs-xs);overflow-wrap:normal;text-orientation:mixed;white-space:nowrap;word-break:keep-all;writing-mode:horizontal-tb;font-weight:800;line-height:1.2;display:block}.learning-topic-row .tch-rate{min-width:0}.learning-topic-name{align-items:flex-start;line-height:1.35}.tch-student-table-stage{display:block}.tch-student-sticky-head{display:none}.tch-table-wrap.tch-list.tch-student-table-wrap{box-shadow:none;background:0 0;border:0;border-radius:0;overflow:visible}.tch-table-wrap.tch-list .tch-student-table{width:100%;min-width:0;display:block}.tch-student-table colgroup,.tch-student-table thead{display:none}.tch-student-table tbody{gap:var(--sp-3);display:grid}.tch-student-table tr.tch-row{gap:var(--sp-2);padding:var(--sp-3);border:1px solid var(--ss-line);background:#fff;border-radius:6px;grid-template-columns:minmax(0,1fr) auto;display:grid}.tch-student-table tr.tch-row td{border:0;padding:0;display:block}.tch-student-table tr.tch-row .tch-cell-name{grid-column:1;min-width:0}.tch-student-table tr.tch-row .tch-chev{padding-left:var(--sp-2);grid-area:1/2;place-self:start end}.tch-student-table tr.tch-row td[data-label]{gap:var(--sp-2);min-width:0;padding-top:var(--sp-2);border-top:1px solid var(--ss-line);grid-column:1/-1;grid-template-columns:84px minmax(0,1fr);align-items:center;display:grid}.tch-student-table tr.tch-row td[data-label]:before{content:attr(data-label);color:var(--ss-muted);font-size:var(--fs-xs);overflow-wrap:normal;text-align:left;text-orientation:mixed;white-space:nowrap;word-break:keep-all;writing-mode:horizontal-tb;font-weight:800;line-height:1.2;display:block}.tch-student-table tr.tch-row .tch-num,.tch-student-table tr.tch-row .tch-time{text-align:left}.tch-student-table tr.tch-row .tch-rate{min-width:0}}html[data-font-scale="1"]{font-size:112.5%}html[data-font-scale="2"]{font-size:125%}html[data-font-scale="3"]{font-size:137.5%}html[data-font-scale="1"] body{line-height:1.65}html[data-font-scale="2"] body{line-height:1.78}html[data-font-scale="3"] body{line-height:1.85}html[data-contrast=high]{--ss-ink-soft:#2b333f;--ss-muted:#3c4552;--ss-line:#c2c8d0;--ss-line-strong:#8b94a1;--ss-snap:#c2410c;--ss-snap-600:#9a3412}html[data-contrast=high] a{text-decoration:underline}html[data-contrast=high] .btn-ghost{color:#2b333f;border-color:#6b7280}:focus-visible{outline:3px solid var(--ss-sort);outline-offset:2px;border-radius:4px}.shell-settings{min-height:36px;padding:0 var(--sp-3);font-size:var(--fs-sm);white-space:nowrap;border:1px solid var(--ss-line-strong);color:var(--ss-ink-soft);background:#fff;border-radius:999px;align-items:center;gap:4px;font-weight:600;line-height:1;text-decoration:none;display:inline-flex}.shell-settings:hover{border-color:var(--ss-sort)}.settings-group{margin-bottom:var(--sp-6)}.settings-group:last-child{margin-bottom:0}.settings-group>.label{margin-bottom:var(--sp-1);font-weight:700;display:block}.settings-group>.hint{color:var(--ss-muted);font-size:var(--fs-sm);margin-bottom:var(--sp-3);display:block}.segmented{gap:var(--sp-2);flex-wrap:wrap;display:flex}.segmented>button{min-height:var(--tap);padding:0 var(--sp-4);border:1px solid var(--ss-line-strong);border-radius:var(--ss-radius-sm);background:var(--ss-surface);color:var(--ss-ink);flex:auto;font-weight:600}.segmented>button[aria-pressed=true]{background:var(--ss-sort);border-color:var(--ss-sort);color:#fff}.quiz-report{margin-top:var(--sp-4);padding-top:var(--sp-3);border-top:1px dashed var(--ss-line);text-align:center}.quiz-report-trigger{border:1px solid var(--ss-line-strong);background:var(--ss-surface);color:var(--ss-ink-soft);font-size:var(--fs-sm);padding:var(--sp-2) var(--sp-4);border-radius:999px;min-height:36px}.quiz-report-trigger:hover{color:var(--ss-snap);text-decoration:underline}.quiz-report-hint{font-size:var(--fs-sm);color:var(--ss-ink-soft);margin-bottom:var(--sp-2);display:block}.quiz-report-reasons{gap:var(--sp-2);flex-wrap:wrap;justify-content:center;display:flex}.quiz-report-details{gap:var(--sp-2);margin-top:var(--sp-2);flex-wrap:wrap;justify-content:center;display:flex}.quiz-report-details[hidden]{display:none}.quiz-report-subhint{font-size:var(--fs-xs);color:var(--ss-ink-soft);flex-basis:100%}.quiz-report-chip{min-height:36px;padding:0 var(--sp-3);border:1px solid var(--ss-line-strong);background:var(--ss-surface);color:var(--ss-ink);font-size:var(--fs-sm);border-radius:999px}.quiz-report-chip:hover{border-color:var(--ss-snap);color:var(--ss-snap)}.quiz-report-chip.selected{border-color:var(--ss-snap);color:var(--ss-snap);background:#fff7ed;font-weight:700}.quiz-report-chip:disabled{opacity:.5}.quiz-report-note{width:min(100%,520px);margin:var(--sp-2) auto 0;border:1px solid var(--ss-line-strong);background:var(--ss-surface);color:var(--ss-ink);font:inherit;font-size:var(--fs-sm);resize:vertical;border-radius:12px;padding:9px 12px;line-height:1.45;display:block}.quiz-report-requirement{min-height:18px;color:var(--ss-bad);font-size:var(--fs-xs);margin-top:6px}.quiz-report-submit{margin-top:var(--sp-2)}.quiz-report-done{color:var(--ss-ok);font-size:var(--fs-sm);display:block}.tch-reports{gap:var(--sp-4);flex-direction:column;display:flex}.tch-report-meta{font-size:var(--fs-sm);margin-bottom:var(--sp-2)}.tch-report-link{margin-top:var(--sp-2);font-size:var(--fs-sm);display:inline-block}.tch-report-actions{gap:var(--sp-2);margin-top:var(--sp-3);flex-wrap:wrap;display:flex}.tch-report-actions .btn{min-height:38px;padding:0 var(--sp-4);flex:none}@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2)format("woff2"),url(/assets/KaTeX_AMS-Regular-DMm9YOAa.woff)format("woff"),url(/assets/KaTeX_AMS-Regular-DRggAlZN.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Bold-ATXxdsX0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Regular-wX97UBjC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff)format("woff"),url(/assets/KaTeX_Fraktur-Bold-BdnERNNW.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff)format("woff"),url(/assets/KaTeX_Fraktur-Regular-CB_wures.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Main-Bold-Cx986IdX.woff2)format("woff2"),url(/assets/KaTeX_Main-Bold-Jm3AIy58.woff)format("woff"),url(/assets/KaTeX_Main-Bold-waoOVXN0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2)format("woff2"),url(/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff)format("woff"),url(/assets/KaTeX_Main-BoldItalic-DzxPMmG6.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2)format("woff2"),url(/assets/KaTeX_Main-Italic-BMLOBm91.woff)format("woff"),url(/assets/KaTeX_Main-Italic-3WenGoN9.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Main-Regular-B22Nviop.woff2)format("woff2"),url(/assets/KaTeX_Main-Regular-Dr94JaBh.woff)format("woff"),url(/assets/KaTeX_Main-Regular-ypZvNtVU.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2)format("woff2"),url(/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff)format("woff"),url(/assets/KaTeX_Math-BoldItalic-B3XSjfu4.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Math-Italic-t53AETM-.woff2)format("woff2"),url(/assets/KaTeX_Math-Italic-DA0__PXp.woff)format("woff"),url(/assets/KaTeX_Math-Italic-flOr_0UB.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff)format("woff"),url(/assets/KaTeX_SansSerif-Bold-CFMepnvq.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff)format("woff"),url(/assets/KaTeX_SansSerif-Italic-YYjJ1zSn.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff)format("woff"),url(/assets/KaTeX_SansSerif-Regular-BNo7hRIc.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Script-Regular-D3wIWfF6.woff2)format("woff2"),url(/assets/KaTeX_Script-Regular-D5yQViql.woff)format("woff"),url(/assets/KaTeX_Script-Regular-C5JkGWo-.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2)format("woff2"),url(/assets/KaTeX_Size1-Regular-C195tn64.woff)format("woff"),url(/assets/KaTeX_Size1-Regular-Dbsnue_I.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2)format("woff2"),url(/assets/KaTeX_Size2-Regular-oD1tc_U0.woff)format("woff"),url(/assets/KaTeX_Size2-Regular-B7gKUWhC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,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)format("woff2"),url(/assets/KaTeX_Size3-Regular-CTq5MqoE.woff)format("woff"),url(/assets/KaTeX_Size3-Regular-DgpXs0kz.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2)format("woff2"),url(/assets/KaTeX_Size4-Regular-BF-4gkZK.woff)format("woff"),url(/assets/KaTeX_Size4-Regular-DWFBv043.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2)format("woff2"),url(/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff)format("woff"),url(/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf)format("truetype")}.katex{text-indent:0;text-rendering:auto;font:1.21em/1.2 KaTeX_Main,Times New Roman,serif;position:relative}.katex *{border-color:currentColor;-ms-high-contrast-adjust:none!important}.katex .katex-version:after{content:"0.17.0"}.katex .katex-mathml{clip-path:inset(50%);border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.katex .katex-html>.newline{display:block}.katex .base{white-space:nowrap;width:min-content;position:relative}.katex .base,.katex .strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;table-layout:fixed;display:inline-table}.katex .vlist-r{display:table-row}.katex .vlist{vertical-align:bottom;display:table-cell;position:relative}.katex .vlist>span{height:0;display:block;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{width:0;overflow:hidden}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{vertical-align:bottom;width:2px;min-width:2px;font-size:1px;display:table-cell}.katex .vbox{flex-direction:column;align-items:baseline;display:inline-flex}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{flex-direction:row;display:inline-flex}.katex .thinbox{width:0;max-width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .hdashline,.katex .hline,.katex .mfrac .frac-line,.katex .overline .overline-line,.katex .rule,.katex .underline .underline-line{min-height:1px}.katex .mspace{display:inline-block}.katex .smash{line-height:0;display:inline}.katex .clap,.katex .llap,.katex .rlap{width:0;position:relative}.katex .clap>.inner,.katex .llap>.inner,.katex .rlap>.inner{position:absolute}.katex .clap>.fix,.katex .llap>.fix,.katex .rlap>.fix{display:inline-block}.katex .llap>.inner{right:0}.katex .clap>.inner,.katex .rlap>.inner{left:0}.katex .clap>.inner>span{margin-left:-50%;margin-right:50%}.katex .rule{border:0 solid;display:inline-block;position:relative}.katex .hline,.katex .overline .overline-line,.katex .underline .underline-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .hdashline{border-bottom-style:dashed;width:100%;display:inline-block}.katex .sqrt>.root{margin-left:.277778em;margin-right:-.555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .sizing.reset-size2.size1{font-size:.833333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .sizing.reset-size2.size3{font-size:1.16667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.33333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .sizing.reset-size2.size6{font-size:1.66667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .sizing.reset-size2.size10{font-size:3.45667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.14667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.714286em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.857143em}.katex .fontsize-ensurer.reset-size3.size3,.katex .sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .sizing.reset-size3.size4{font-size:1.14286em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.28571em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.42857em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.71429em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.05714em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.46857em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.96286em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.55429em}.katex .fontsize-ensurer.reset-size4.size1,.katex .sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .sizing.reset-size5.size1{font-size:.555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .sizing.reset-size5.size6{font-size:1.11111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.33333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .sizing.reset-size5.size10{font-size:2.30444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.76444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .sizing.reset-size7.size1{font-size:.416667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .sizing.reset-size7.size3{font-size:.583333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .sizing.reset-size7.size6{font-size:.833333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .sizing.reset-size7.size10{font-size:1.72833em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.07333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.347222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.416667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.486111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .sizing.reset-size8.size6{font-size:.694444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.833333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .sizing.reset-size8.size10{font-size:1.44028em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.72778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.289352em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.347222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.405093em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.520833em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.578704em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.694444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.833333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .sizing.reset-size9.size10{font-size:1.20023em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.43981em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.24108em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.289296em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.385728em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.433944em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.48216em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.578592em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.694311em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.833173em}.katex .fontsize-ensurer.reset-size10.size10,.katex .sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .sizing.reset-size10.size11{font-size:1.19961em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.200965em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.241158em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.281351em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.321543em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.361736em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.401929em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.482315em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.694534em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.833601em}.katex .fontsize-ensurer.reset-size11.size11,.katex .sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{width:.12em;display:inline-block}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .accent .accent-body{position:relative}.katex .accent .accent-body:not(.accent-full){width:0}.katex .overlay{display:block}.katex .mtable .vertical-separator{min-width:1px;display:inline-block}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;height:inherit;width:100%;display:block;position:absolute}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;min-width:0;max-width:none;min-height:0;max-height:none}.katex .stretchy{width:100%;display:block;position:relative;overflow:hidden}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{width:100%;position:relative;overflow:hidden}.katex .halfarrow-left{width:50.2%;position:absolute;left:0;overflow:hidden}.katex .halfarrow-right{width:50.2%;position:absolute;right:0;overflow:hidden}.katex .brace-left{width:25.1%;position:absolute;left:0;overflow:hidden}.katex .brace-center{width:50%;position:absolute;left:25%;overflow:hidden}.katex .brace-right{width:25.1%;position:absolute;right:0;overflow:hidden}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{box-sizing:border-box;border:.04em solid}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{box-sizing:border-box;border-top:.049em solid;border-right:.049em solid;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{text-align:left;display:inline-block;position:absolute;right:calc(50% + .3em)}.katex .cd-label-right{text-align:right;display:inline-block;position:absolute;left:calc(50% + .3em)}.katex-display{text-align:center;margin:1em 0;display:block}.katex-display>.katex{text-align:center;white-space:nowrap;display:block}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{text-align:left;padding-left:2em}body{counter-reset:katexEqnNo mmlEqnNo}