@font-face{font-family:Jost;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/jost-latin-500-normal-41lBe9I9.woff2)format("woff2"),url(/assets/jost-latin-500-normal-B-AtzreL.woff)format("woff")}@font-face{font-family:Jost;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/jost-latin-600-normal-C497H-z9.woff2)format("woff2"),url(/assets/jost-latin-600-normal-Bv_M0d15.woff)format("woff")}@font-face{font-family:Jost;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/jost-latin-ext-600-normal-D8I9kjga.woff2)format("woff2"),url(/assets/jost-latin-ext-600-normal-Pm6OqGZB.woff)format("woff")}:root{--brand-crimson:#ae191e;--brand-crimson-deep:#9f1f24;--brand-cream:#fdebd1;--brand-gold:#d8b860;--brand-coral:#e9463f;--brand-red:#e60a20;--brand-orange:#e95505;--brand-yellow:#fbc50d;--ribbon:linear-gradient(90deg, var(--brand-coral) 0 25%, var(--brand-red) 25% 50%, var(--brand-orange) 50% 75%, var(--brand-yellow) 75%);--bg:#fbf6ef;--surface:#fff;--text:#2a1614;--muted:#6b524c;--line:#eadfcd;--primary:var(--brand-crimson);--primary-ink:#fff;--primary-soft:#f9e3df;--secondary:var(--brand-cream);--bar-bg:var(--brand-crimson);--bar-ink:var(--brand-cream);--danger:#b8231c;--ok:#2e7a47;--warn:#9a4a06;--radius:18px;--radius-sm:12px;--shadow-sm:0 1px 2px #4a20140f;--shadow:0 1px 2px #4a20140d, 0 6px 20px #4a201412;--shadow-lg:0 8px 32px #4a201429;--tabbar-h:74px;--font-cjk:"Source Han Sans SC", "Noto Sans CJK SC", "Noto Sans SC", "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei", sans-serif;--font-body:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, var(--font-cjk);--font-display:"Jost", var(--font-cjk);--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-size:18px}@media 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#500a0c2e}.topbar:after{content:"";background:var(--ribbon);height:4px;position:absolute;bottom:0;left:0;right:0}.brand{color:var(--bar-ink);letter-spacing:.04em;white-space:nowrap;align-items:center;gap:8px;font-size:1.15rem;font-weight:600;text-decoration:none;display:inline-flex}.brand .icon,.login .card h1 .icon{box-sizing:content-box;background:var(--brand-cream);border-radius:50%;padding:4px}.topnav{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:2px;display:flex}.topnav-item{min-height:44px;color:var(--bar-ink);font:inherit;cursor:pointer;white-space:nowrap;background:0 0;border:0;border-radius:999px;align-items:center;gap:6px;padding:8px 12px;font-size:.95rem;text-decoration:none;transition:background-color .15s;display:inline-flex}.topnav-item .nav-icon{opacity:.85;width:18px;height:18px}.topnav-item:hover{background:#ffffff1f}.topnav-item.active{background:var(--brand-cream);color:var(--brand-crimson);font-weight:600}.topnav-item.active 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span{flex:1}.toast-close{min-width:44px;min-height:44px;color:var(--muted);cursor:pointer;background:0 0;border:0;font-size:1.5rem}.tag-locked{background:var(--danger);color:#fff;border-radius:999px;margin-left:4px;padding:0 7px;font-size:.75rem;font-weight:700;display:inline-block}.badge{text-align:center;background:var(--brand-yellow);color:#2a1614;min-width:20px;font-size:.75rem;font-weight:700;font-family:var(--font-display);border-radius:999px;margin-left:4px;padding:0 6px;line-height:20px}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}a.card{color:inherit;text-decoration:none}.card.task{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;display:flex}.card.task 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.15s,transform .1s,filter .15s;display:inline-flex}.btn:active:not(:disabled){transform:scale(.98)}.btn:disabled{opacity:.5;cursor:default}.btn.disabled{opacity:.5;pointer-events:none}label.btn{cursor:pointer}label.check.content-pick{flex:1;align-items:flex-start;gap:10px;display:flex}.content-pick input{flex-shrink:0;width:20px;height:20px;margin-top:4px}.content-pick h3{margin:0 0 4px}.btn-primary{background:var(--primary);color:var(--primary-ink);box-shadow:0 2px 8px #ae191e40}.btn-primary:hover:not(:disabled){filter:brightness(1.08);box-shadow:0 4px 14px #ae191e4d}.btn-secondary{background:var(--secondary);color:var(--text);border-color:color-mix(in srgb, var(--brand-gold) 70%, transparent)}.btn-secondary:hover:not(:disabled){border-color:var(--brand-gold);filter:brightness(.98)}.btn-danger{color:var(--danger);border-color:var(--danger);background:0 0}.btn-danger:hover:not(:disabled){background:color-mix(in srgb, var(--danger) 8%, transparent)}.btn-large{border-radius:16px;min-height:60px;padding:12px 28px;font-size:1.15rem}.btn-block{width:100%}.btn-link{color:var(--primary);font:inherit;cursor:pointer;text-underline-offset:3px;background:0 0;border:none;padding:6px 8px}.file-btn{min-height:44px}input:focus-visible,select:focus-visible,button:focus-visible,a:focus-visible{outline:3px solid var(--brand-yellow);outline-offset:2px}input,select{font:inherit;color:var(--text);background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);width:100%;min-height:48px;padding:10px 14px;transition:border-color .15s,box-shadow .15s}input:hover,select:hover{border-color:color-mix(in srgb, var(--brand-gold) 60%, var(--line))}input:focus,select:focus{border-color:var(--primary);box-shadow:0 0 0 3px 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auto;display:flex}.training-footer{flex-direction:column;gap:14px;display:flex}.training-meta{order:-1;align-items:center;gap:12px;min-height:44px;display:flex}.training-card:focus{outline:none}.training-exit{min-height:44px;color:var(--muted);background:var(--surface);border:1px solid var(--line);border-radius:999px;flex:none;align-items:center;gap:4px;padding:6px 14px 6px 10px;font-size:.95rem;font-weight:600;text-decoration:none;display:inline-flex}.training-exit .nav-icon{width:20px;height:20px}.training-title{text-align:right;text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0;margin:0;font-size:.95rem;overflow:hidden}.training-title:only-child{text-align:center}.training-progress{align-items:center;gap:12px;margin:-4px 0 14px;display:flex}.training-progress .progress{flex:1;height:8px}.training-count{color:var(--muted);font-family:var(--font-display);flex:none;font-size:.95rem}.training-count b{color:var(--text);font-size:1.25em}@media (width<=899px){.training{gap:12px;min-height:calc(100dvh + 28px)}.training-card{padding:14px 12px}.training-footer .btn-primary{flex:1}.training-meta{height:40px;min-height:40px}.training-title{font-size:.85rem}.training-exit{min-height:40px;padding-block:4px}.training-progress{gap:10px;margin:-4px 0 10px}.training-progress .progress{height:6px}.training-count{font-size:.85rem}:root:has(.tabbar) .training{min-height:calc(100dvh - var(--tabbar-h) - env(safe-area-inset-bottom) + 28px)}}.progress{background:var(--secondary);border-radius:999px;height:10px;overflow:hidden}.progress>div{background:linear-gradient(90deg, var(--brand-crimson), var(--brand-coral) 55%, var(--brand-orange) 80%, var(--brand-yellow));background-size:720px 100%;border-radius:999px;height:100%;transition:width .3s}.exercise{text-align:center;flex-direction:column;align-items:center;gap:16px;display:flex}.prompt{font-size:1.5rem}.big-text{letter-spacing:.05em;font-size:1.8rem;font-weight:600}.picture{display:block}.picture-lg{object-fit:contain;width:min(60vw,260px);height:min(60vw,260px)}.picture-md{object-fit:contain;width:min(26vw,120px);height:min(26vw,120px)}.picture-wide{width:min(100%,700px);height:auto}img.picture-lg{border-radius:var(--radius-sm);width:auto;max-width:100%;height:auto;max-height:min(40vh,260px)}.options-images .option{padding:6px}.options-images img.picture-md{aspect-ratio:4/3;object-fit:contain;border-radius:10px;width:100%;height:auto}.picture-sm{object-fit:contain;width:56px;height:56px}.picture-emoji{place-items:center;line-height:1;display:grid}.picture-lg.picture-emoji{font-size:min(40vw,170px)}.picture-md.picture-emoji{font-size:min(18vw,80px)}.picture-sm.picture-emoji{font-size:40px}.emoji-img{width:1em;height:1em}.options{grid-template-columns:1fr;gap:12px;width:100%;display:grid}@media (width>=560px){.options{grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}}.options-images{grid-template-columns:repeat(auto-fill,minmax(min(40vw,190px),1fr))}.options-compact{grid-template-columns:repeat(auto-fit,minmax(52px,1fr))}.option{min-height:72px;font:inherit;color:var(--text);background:var(--surface);border:2px solid var(--line);border-radius:var(--radius);cursor:pointer;touch-action:manipulation;box-shadow:var(--shadow-sm);flex-direction:column;justify-content:center;align-items:center;gap:6px;padding:10px;font-size:1.4rem;font-weight:600;transition:border-color .15s,background-color .15s,transform .1s,box-shadow .15s;display:flex}.option:hover:not(:disabled){border-color:color-mix(in srgb, var(--primary) 40%, var(--line));box-shadow:var(--shadow)}.option:active:not(:disabled){transform:scale(.98)}.option.selected{border-color:var(--primary);background:var(--primary-soft);box-shadow:0 0 0 3px color-mix(in srgb, var(--primary) 15%, transparent)}.option-multi{position:relative}.option-multi:after{content:"";border:2px solid var(--line);background:var(--surface);text-align:center;border-radius:7px;width:24px;height:24px;font-size:18px;line-height:20px;position:absolute;top:8px;right:8px}.option-multi.selected:after{content:"✓";border-color:var(--primary);background:var(--primary);color:var(--primary-ink)}.demo-video{border-radius:var(--radius);background:#000;width:100%;max-width:640px;max-height:60vh}.option:disabled{cursor:default}.blank-input{font:inherit;border:none;border-bottom:3px solid var(--primary);width:4.5em;min-height:0;color:var(--primary);text-align:center;background:0 0;border-radius:0;margin:0 4px;padding:2px 4px}.blank-input:focus{box-shadow:none;background:var(--primary-soft)}.text-prompt{white-space:pre-wrap}.text-prompt.passage{text-align:left;font-size:1.3rem;line-height:2.2}.text-answer{font:inherit;border:2px solid var(--line);border-radius:var(--radius-sm);width:100%;padding:12px;font-size:1.6rem}.blank-input.blank-active{background:var(--primary-soft)}.handwriting{flex-direction:column;align-items:center;gap:10px;width:100%;display:flex}.handwriting-canvas{aspect-ratio:1;touch-action:none;background:var(--surface);border:2px solid var(--primary);border-radius:var(--radius-sm);cursor:crosshair;width:min(300px,100%,32svh);max-width:100%}.handwriting-candidates{text-align:center;flex-wrap:nowrap;justify-content:center;align-items:center;gap:4px;width:min(360px,100%);min-width:0;height:52px;font-size:.95rem;line-height:1.3;display:flex;overflow:hidden}.handwriting-candidates .chip{flex:1 1 0;min-width:0;max-width:44px;height:100%;min-height:0;padding:0;font-size:min(1.5rem,6.4vw)}.handwriting-tools{justify-content:center;gap:8px;width:min(300px,100%);display:flex}.handwriting-tools .btn{white-space:nowrap;flex:1;padding-left:6px;padding-right:6px}.submit-area{flex-direction:column;align-items:center;gap:6px;display:flex}.submit-hint{margin:0;font-size:.9rem}.submit-bar{background:var(--surface);border-top:1px solid var(--line);border-radius:0 0 var(--radius) var(--radius);width:calc(100% + 24px);margin:0 -12px -14px;padding:10px 12px 12px}.submit-sticky{z-index:2;position:sticky;bottom:0}.submit-bar .btn{width:min(300px,100%)}@media (width<=899px){:root:has(.tabbar) .submit-sticky{bottom:calc(var(--tabbar-h) + env(safe-area-inset-bottom))}.exercise:has(.handwriting){gap:8px}.exercise:has(.handwriting) .prompt{margin:0;font-size:1.05rem;line-height:1.4}.exercise:has(.handwriting) .text-prompt{margin:0}.exercise:has(.handwriting) .text-answer{padding:6px 10px;font-size:1.4rem}.exercise:has(.handwriting)>p{margin:0}.handwriting{gap:6px}.submit-bar{padding:8px 12px 10px}}.ink-answer{margin-bottom:10px}.ink-row{flex-wrap:wrap;align-items:flex-end;gap:6px;display:flex}.ink-char{flex-direction:column;align-items:center;gap:2px;display:inline-flex}.ink-char svg{border:1px solid var(--line);background:var(--surface);border-radius:6px;width:64px;height:64px}.ink-char svg .ink-grid{stroke:var(--line);stroke-dasharray:6 6;stroke-width:1.5px}.ink-char svg .ink-stroke{fill:none;stroke:var(--text);stroke-width:9px;stroke-linecap:round;stroke-linejoin:round}.blank{border-bottom:3px solid var(--primary);min-width:2.5em;color:var(--primary);margin:0 4px;display:inline-block}.sentence-line{border:2px dashed var(--line);border-radius:var(--radius);background:color-mix(in srgb, var(--secondary) 35%, transparent);flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;width:100%;min-height:72px;padding:10px;display:flex}.chips{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.chip{font:inherit;border-radius:var(--radius-sm);border:2px solid 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