:root{--ink: #2c1f28;--ink-soft: #6a5560;--paper: #fff8fb;--paper-2: #ffffff;--line: #f0d7e3;--pipi-pink: #f7a8c4;--pipi-dress: #e8453c;--pipi-backdrop: #d9ecff;--pipi-skin: #f7a8c4;--pipi-snout: #f9bcd5;--pipi-line: #d9809f;--pipi-shoe: #2b2b2b;--go: #2f9e5c;--go-soft: #e6f7ec;--warm: #ffb020;--warm-soft: #fff5e0;--info: #3d7fd8;--info-soft: #e8f1ff;--radius: 22px;--radius-sm: 14px;--shadow: 0 6px 18px rgba(120, 80, 105, .13);--shadow-lift: 0 10px 26px rgba(120, 80, 105, .2);--tap-min: 56px;--tap-primary: 72px;--font: "Nunito", "Quicksand", "Segoe UI", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;padding:0;min-height:100%;background:var(--paper);color:var(--ink);font-family:var(--font);font-size:17px;line-height:1.5;overscroll-behavior-y:none}body{max-width:100vw;overflow-x:hidden}#root{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column}button{font-family:inherit;font-size:inherit;cursor:pointer;border:none;background:none;color:inherit}button:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--info);outline-offset:3px;border-radius:8px}.screen{flex:1;display:flex;flex-direction:column;width:100%;max-width:560px;margin:0 auto;padding:16px 16px calc(16px + env(safe-area-inset-bottom));gap:14px}.screen--center{justify-content:center;align-items:center;text-align:center}.progress-rail{display:flex;gap:6px;width:100%;padding:4px 0}.progress-rail__dot{flex:1;height:8px;border-radius:99px;background:var(--line);transition:background .26s ease,transform .26s ease}.progress-rail__dot--done{background:var(--go)}.progress-rail__dot--now{background:var(--warm);transform:scaleY(1.5)}.teacher{display:flex;flex-direction:column;align-items:center;gap:8px}.teacher__bubble{position:relative;background:var(--paper-2);border:3px solid var(--line);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow);width:100%;min-height:68px;display:flex;align-items:center;justify-content:center}.teacher__text{font-size:1.35rem;font-weight:700;line-height:1.35;text-align:center;margin:0;overflow-wrap:anywhere}.teacher__hint{margin:6px 0 0;font-size:.95rem;color:var(--ink-soft);font-weight:600}.target-card{background:var(--paper-2);border:3px solid var(--pipi-pink);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px 16px;text-align:center}.target-card__label{font-size:.72rem;letter-spacing:.07em;text-transform:uppercase;color:var(--ink-soft);font-weight:800}.target-card__text{margin:6px 0 0;font-size:1.85rem;line-height:1.2;font-weight:800;color:var(--ink);overflow-wrap:anywhere}.target-card__zh{margin:8px 0 0;font-size:1.05rem;font-weight:700;color:var(--ink-soft)}.comfort-line{margin:0;text-align:center;font-size:1rem;font-weight:700;color:var(--ink-soft)}.crash-panel{background:var(--paper-2);border:3px solid var(--pipi-pink);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px 18px;max-width:420px;width:100%}.crash-panel__title{margin:0 0 6px;font-size:1.2rem;font-weight:800;color:var(--ink)}.crash-panel__note{margin:0 0 14px;font-size:.86rem;color:var(--ink-soft)}.teacher__speaking-dot{position:absolute;top:-9px;right:16px;background:var(--pipi-dress);color:#fff;font-size:.7rem;font-weight:800;letter-spacing:.06em;padding:3px 10px;border-radius:99px;text-transform:uppercase}.btn{display:flex;align-items:center;justify-content:center;gap:10px;min-height:var(--tap-min);padding:14px 20px;border-radius:var(--radius);font-weight:800;font-size:1.05rem;transition:transform .12s ease,box-shadow .12s ease,background .12s ease;user-select:none;text-align:center}.btn:active{transform:translateY(2px) scale(.99)}.btn--primary{min-height:var(--tap-primary);background:linear-gradient(180deg,#3fb56a,var(--go));color:#fff;font-size:1.3rem;box-shadow:0 6px #237a45,var(--shadow)}.btn--primary:active{box-shadow:0 3px #237a45,var(--shadow)}.btn--mic{min-height:88px;width:88px;border-radius:50%;background:linear-gradient(180deg,#ff6b6b,#e8453c);color:#fff;box-shadow:0 6px #b8322b,var(--shadow);flex-direction:column;gap:2px;font-size:.78rem;font-weight:800;padding:0}.btn--mic .btn__icon{font-size:1.9rem;line-height:1}.btn--mic[data-listening=true]{background:linear-gradient(180deg,#ff8a8a,#ff5c4d);animation:pulse 1.15s ease-in-out infinite}.btn--mic[disabled]{opacity:.5;box-shadow:0 6px #9c9c9c}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.07)}}.btn--ghost{background:var(--paper-2);border:3px solid var(--line);color:var(--ink);box-shadow:var(--shadow)}.btn--soft{background:var(--info-soft);color:#1c4d92;border:2px solid #c6dcfb;font-size:.98rem;min-height:48px;padding:10px 14px}.btn--warm{background:var(--warm-soft);color:#8a5a00;border:2px solid #ffdfa1;font-size:.98rem;min-height:48px;padding:10px 14px}.btn--wide{width:100%}.button-row{display:flex;gap:10px;width:100%}.button-row>*{flex:1}.choices{display:grid;grid-template-columns:repeat(auto-fit,minmax(132px,1fr));gap:12px;width:100%}.choice{display:flex;flex-direction:column;align-items:center;gap:6px;padding:14px 10px;min-height:108px;background:var(--paper-2);border:3px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);font-weight:800;font-size:1rem;transition:transform .12s ease,border-color .12s ease}.choice:active{transform:scale(.97)}.choice[data-picked=true]{border-color:var(--go);background:var(--go-soft)}.choice[data-correct=true]{border-color:var(--go);background:var(--go-soft);animation:pop .32s ease}.choice[data-wrong=true]{border-color:var(--warm);background:var(--warm-soft)}@keyframes pop{0%{transform:scale(1)}55%{transform:scale(1.06)}to{transform:scale(1)}}.item-visual{display:inline-flex;align-items:center;justify-content:center;line-height:1}.feedback{display:flex;align-items:center;gap:10px;padding:12px 16px;border-radius:var(--radius-sm);font-weight:700;width:100%;animation:rise .22s ease}.feedback__icon{font-size:1.5rem;line-height:1;flex-shrink:0}.feedback--celebrate{background:var(--go-soft);border:2px solid #bfe8cd;color:#1d6b3d}.feedback--encourage{background:var(--warm-soft);border:2px solid #ffdfa1;color:#8a5a00}.feedback--retry{background:var(--info-soft);border:2px solid #c6dcfb;color:#1c4d92}.feedback--clarify{background:#f3e9ff;border:2px solid #ddc8f7;color:#5d3a94}@keyframes rise{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.home__hello{font-size:2.1rem;font-weight:900;margin:0;letter-spacing:-.01em}.home__sub{margin:0;color:var(--ink-soft);font-weight:700}.home__grow{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;width:100%}.chip{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:99px;background:var(--paper-2);border:2px solid var(--line);font-size:.88rem;font-weight:800;color:var(--ink-soft)}.chip--go{background:var(--go-soft);border-color:#bfe8cd;color:#1d6b3d}.chip--warm{background:var(--warm-soft);border-color:#ffdfa1;color:#8a5a00}.banner{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border-radius:var(--radius-sm);font-size:.92rem;font-weight:700;line-height:1.4;width:100%}.banner--info{background:var(--info-soft);border:2px solid #c6dcfb;color:#1c4d92}.banner--warn{background:var(--warm-soft);border:2px solid #ffdfa1;color:#8a5a00}.banner__icon{font-size:1.2rem;line-height:1.2;flex-shrink:0}.summary{display:flex;flex-direction:column;gap:14px;width:100%;text-align:center}.summary__title{font-size:1.8rem;font-weight:900;margin:0}.summary__list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px;text-align:left}.summary__item{display:flex;gap:10px;align-items:flex-start;background:var(--paper-2);border:2px solid var(--line);border-radius:var(--radius-sm);padding:12px 14px;font-weight:700}.summary__task{background:var(--go-soft);border:2px solid #bfe8cd;border-radius:var(--radius-sm);padding:14px;font-weight:800;color:#1d6b3d;text-align:left}.parent{max-width:760px;padding:20px 16px 60px;gap:16px}.parent__header{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap}.parent__title{font-size:1.5rem;font-weight:900;margin:0}.card{background:var(--paper-2);border:2px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}.card__title{margin:0 0 10px;font-size:1rem;font-weight:900;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-soft)}.stat-row{display:flex;gap:12px;flex-wrap:wrap}.stat{flex:1 1 130px;background:var(--paper);border:2px solid var(--line);border-radius:var(--radius-sm);padding:12px}.stat__value{font-size:1.7rem;font-weight:900;line-height:1.1}.stat__label{font-size:.82rem;font-weight:800;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.05em}.meter{height:10px;border-radius:99px;background:var(--line);overflow:hidden;margin-top:8px}.meter__fill{height:100%;border-radius:99px;background:var(--go);transition:width .42s ease}.meter__fill--warm{background:var(--warm)}.meter__fill--info{background:var(--info)}.table{width:100%;border-collapse:collapse;font-size:.88rem}.table th,.table td{text-align:left;padding:8px 6px;border-bottom:1px solid var(--line)}.table th{font-size:.74rem;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-soft)}.state-pill{display:inline-block;padding:2px 9px;border-radius:99px;font-size:.72rem;font-weight:800;background:var(--line);color:var(--ink-soft);white-space:nowrap}.state-pill--stable{background:var(--go-soft);color:#1d6b3d}.state-pill--learning{background:var(--info-soft);color:#1c4d92}.state-pill--review{background:var(--warm-soft);color:#8a5a00}.muted{color:var(--ink-soft);font-weight:600;font-size:.9rem}.stack{display:flex;flex-direction:column;gap:12px}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.spacer{flex:1}.notice{border-radius:10px;padding:8px 10px;font-weight:600;font-size:.9rem;line-height:1.35}.notice--info{background:var(--info-soft);color:#1c4d92}.field{display:flex;flex-direction:column;gap:4px}.field>.muted{font-size:.8rem}.field input,.field select,.field textarea{font:inherit;color:var(--ink);background:#fff;padding:10px 12px;border-radius:var(--radius-sm);border:2px solid var(--line);min-width:8rem}.field textarea{min-width:100%;resize:vertical;line-height:1.5}.field input:focus,.field select:focus,.field textarea:focus{outline:3px solid var(--pipi-dress);outline-offset:1px}.field input:disabled,.field select:disabled,.field textarea:disabled{opacity:.6}pre.debug{background:#1f1a24;color:#e6e0ec;padding:14px;border-radius:var(--radius-sm);font-size:.76rem;overflow-x:auto;max-width:100%;line-height:1.45}.spinner{width:42px;height:42px;border:5px solid var(--line);border-top-color:var(--pipi-dress);border-radius:50%;animation:spin .85s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.link{color:var(--info);font-weight:800;text-decoration:none;min-height:44px;display:inline-flex;align-items:center}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}@media(max-width:360px){html{font-size:15.5px}.teacher__text{font-size:1.2rem}.choices{grid-template-columns:repeat(2,1fr)}.btn--mic{width:78px;height:78px;min-height:78px}}