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0;padding:12px;border-radius:14px;background:var(--green-soft);color:var(--green-deep);font-weight:800}.content-dialogue-lines{margin:14px 0;padding:0;list-style:none;text-align:left}.content-dialogue-lines li{padding:10px 0;border-bottom:1px solid var(--line)}.content-dialogue-lines span,.content-dialogue-lines small{display:block;color:var(--muted);font-size:11px}.content-dialogue-lines strong{display:block;margin-top:3px;font-size:18px}.content-dialogue-lines small{margin-top:3px}.content-player>.exercise-cta{margin-top:auto}.exercise-audio{display:inline-flex;align-items:center;gap:6px;flex:none}.audio-icon-button{width:40px;height:40px}.audio-error-copy{max-width:180px;color:var(--red);font-size:10px;font-weight:700}.exercise-choice-list{display:flex;flex-direction:column;gap:9px}.exercise-choice{display:flex;align-items:center;gap:12px;width:100%;min-height:58px;padding:10px 13px;border:1.5px solid transparent;border-radius:20px;background:var(--surface);color:var(--text);box-shadow:var(--shadow-sm);text-align:left;transition:all .18s ease}.exercise-choice.is-selected,.exercise-choice.is-right{border-color:var(--green);background:var(--green-soft)}.exercise-choice.is-wrong{border-color:var(--red);background:var(--red-soft)}.exercise-choice:disabled{cursor:default}.choice-marker{width:26px;height:26px;display:grid;place-items:center;flex:none;border:2px solid var(--line);border-radius:50%;color:var(--muted);font-size:12px;font-weight:800}.is-selected .choice-marker{border-color:var(--green);background:var(--green);color:#fff}.is-wrong .choice-marker{border-color:var(--red);background:var(--red);color:#fff}.choice-copy{display:flex;flex-direction:column;gap:3px;min-width:0}.choice-copy strong{font-size:14px}.choice-copy small{color:var(--muted);font-size:11px;font-weight:700}.exercise-image{width:44px;height:44px;object-fit:cover;border-radius:12px}.sentence-blank-body{display:flex;flex-direction:column;gap:13px}.sentence-card{padding:18px 14px;border-radius:22px;background:var(--surface);box-shadow:var(--shadow-sm);text-align:center}.sentence-hanzi{font-size:25px;line-height:1.5}.sentence-gap{display:inline-flex;min-width:56px;height:34px;align-items:center;justify-content:center;margin:0 3px;padding:0 8px;border:2px dashed var(--line);border-radius:12px;color:var(--muted)}.sentence-gap.is-filled{border-style:solid;border-color:var(--green);background:var(--green-soft);color:var(--green-deep)}.sentence-pinyin{margin-top:8px;color:var(--muted);font-size:12.5px;font-weight:700}.sentence-options{flex-direction:row;flex-wrap:wrap}.sentence-chip{display:flex;align-items:center;gap:8px;padding:11px 14px;border:2px solid transparent;border-radius:99px;background:var(--surface);color:var(--text);box-shadow:var(--shadow-sm)}.sentence-chip.is-selected{border-color:var(--green);background:var(--green-soft);color:var(--green-deep)}.sentence-chip .hz{font-size:19px}.sentence-chip small{color:var(--muted);font-size:11.5px;font-weight:700}.exercise-answer-note{color:var(--muted);font-size:11px;font-weight:700}.multi-select-body{display:flex;flex-direction:column;gap:10px}.multi-select-meta{display:flex;align-items:center;justify-content:space-between;gap:8px;color:var(--muted);font-size:11.5px;font-weight:800}.multi-select-meta strong{color:var(--green-deep)}.multi-select-list{display:flex;flex-wrap:wrap;gap:9px}.multi-select-chip{display:flex;align-items:center;gap:8px;padding:11px 13px;border:2px solid transparent;border-radius:99px;background:var(--surface);color:var(--text);box-shadow:var(--shadow-sm)}.multi-select-chip.is-selected{border-color:var(--green);background:var(--green-soft)}.multi-checkbox{width:20px;height:20px;display:grid;place-items:center;border:2px solid var(--line);border-radius:6px;font-size:11px}.is-selected .multi-checkbox{border-color:var(--green);background:var(--green);color:#fff}.multi-select-chip .hz{font-size:19px}.multi-select-chip small{color:var(--muted);font-size:11.5px;font-weight:700}.tone-input-body{display:flex;flex-direction:column;gap:10px}.tone-card{padding:15px;border-radius:22px;background:var(--surface);box-shadow:var(--shadow-sm)}.tone-card-head{display:flex;align-items:center;gap:11px;margin-bottom:11px}.tone-syllable{font-size:28px}.tone-reading{color:var(--green-deep);font-size:15px;font-weight:800}.tone-card-head .exercise-audio{margin-left:auto}.tone-card-head .audio-icon-button{width:34px;height:34px;border-radius:12px;background:var(--green-soft);color:var(--green-deep);box-shadow:none;font-size:13px}.tone-buttons{display:flex;gap:7px}.tone-button{flex:1;height:46px;min-width:0;border:2px solid transparent;border-radius:15px;background:var(--surface2);color:var(--text);font-size:15px;font-weight:800}.tone-button.is-selected{border-color:var(--green);background:var(--green-soft);color:var(--green-deep)}.tone-button.is-wrong{border-color:var(--red);background:var(--red-soft);color:var(--red)}@media(max-width:340px){.learning-cta-row{flex-direction:column}.learning-cta-row .secondary{width:100%}.tone-buttons{gap:4px}.tone-button{font-size:13px}.metadata-pills{gap:4px}.formula-single{max-width:100%}}@media(min-width:768px){.exercise-shell{height:min(830px,100dvh);min-height:min(830px,100dvh);box-shadow:0 0 0 1px #201e1d0a}.exercise-header{padding-top:20px}.worksheet-a4-view{padding:30px}}@media(prefers-reduced-motion:reduce){.learning-screen,.exercise-shell,.worksheet-modal-approved,.exercise-feedback,.transcript-panel{animation:none}.dialogue-wave.is-playing i,.audio-button.playing:before,.audio-icon-button.playing:before{animation:none}.ring-value{animation:none;stroke-dashoffset:0}}