.zc-classroom{--zc-ink:#574865;--zc-purple:#80689c;--zc-line:#e8e0ee;--zc-green:#72915c;color:var(--zc-ink);font-family:inherit;background:#f8f6fb;border:1px solid var(--zc-line);border-radius:22px;overflow:hidden}.zc-classroom *{box-sizing:border-box}.zc-classroom button,.zc-classroom select{font:inherit}.zc-classroom button{cursor:pointer}.zc-classroom button:focus-visible,.zc-classroom select:focus-visible,.zc-classroom input:focus-visible{outline:3px solid #b6a0cc;outline-offset:3px}.zc-classroom button:disabled{opacity:.4;cursor:default}.zc-classroom [hidden]{display:none!important}.zc-shell{padding:25px 28px;max-width:1440px;margin:auto}.zc-toolbar{display:flex;align-items:center;gap:22px;margin-bottom:24px}.zc-title{flex:1;min-width:0}.zc-title>span{font-size:10px;letter-spacing:2px;color:#9c8aaa}.zc-title h1{font-size:25px;line-height:1.4;margin:4px 0;color:#625071;overflow-wrap:anywhere}.zc-title p{margin:3px 0 0;font-size:11px;color:#9c8da7;line-height:1.6}.zc-toolbar-actions{display:flex;gap:9px;align-items:center;flex-wrap:wrap}.zc-button{border:1px solid #ded3e9;border-radius:10px;min-height:40px;padding:9px 15px;background:#fff;color:#867194;font-size:12px!important;font-weight:500;white-space:nowrap;transition:background .16s,transform .16s}.zc-button:hover:not(:disabled){background:#f0eaf7;transform:translateY(-1px)}.zc-button.primary{background:#8973a2;border-color:#8973a2;color:#fff}.zc-button.primary:hover:not(:disabled){background:#78608f}.zc-text-button{border:0;background:none;color:#8a719f;padding:6px 0;font-size:12px!important;white-space:nowrap}.zc-word-strip{display:flex;align-items:center;gap:8px;overflow-x:auto;padding:0 0 14px;scrollbar-width:thin}.zc-word-tab{flex-shrink:0;border:1px solid #e4dbea;background:#fff;color:#9986a5;border-radius:9px;padding:8px 15px;min-height:39px;min-width:43px;font-size:16px!important}.zc-word-tab.selected{background:#8973a2;border-color:#8973a2;color:#fff;box-shadow:0 4px 9px #806a981b}.zc-main{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(280px,.92fr);gap:22px}.zc-board-panel,.zc-structure-panel,.zc-sentence-panel{background:#fff;border:1px solid #e9e1ef;border-radius:17px;padding:22px 25px}.zc-board-heading{display:flex;align-items:center;justify-content:space-between;gap:10px}.zc-overline{font-size:10px;letter-spacing:1px;color:#a291ad}.zc-board-heading h2{display:inline;font-size:22px;letter-spacing:4px;margin:0 0 0 13px;font-weight:600;color:#766083}.zc-count{font-size:11px;color:#9a88a7;white-space:nowrap}.zc-character-tabs{display:flex;align-items:center;gap:6px;margin-top:15px;flex-wrap:wrap}.zc-character-tabs button{width:35px;height:35px;border:1px solid #e4d9ee;background:#f8f5fc;color:#957ca8;border-radius:7px;font-size:19px}.zc-character-tabs button.selected{border-color:#a78dba;background:#eae0f3}.zc-character-tabs small{font-size:10px;color:#a394ae;margin-left:4px}.zc-pinyin{text-align:center;font-size:26px;letter-spacing:3px;color:#9278a4;min-height:39px;margin:12px 0 5px}.zc-grid{width:min(100%,365px);aspect-ratio:1;position:relative;margin:8px auto 19px;border:2px solid #e2d6df;border-radius:8px;background:#fffdfb;overflow:hidden}.zc-grid-lines{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.zc-grid-lines path{stroke:#d9ccd7;stroke-width:1;stroke-dasharray:6 6;fill:none}.zc-grid-lines .diagonal{stroke:#e9e0e8;stroke-dasharray:4 7}.zc-hanzi-target{width:100%;height:100%;position:relative;display:flex;align-items:center;justify-content:center}.zc-hanzi-target>svg{display:block}.zc-font-fallback{font-size:clamp(110px,15vw,230px);font-family:'Kaiti SC','STKaiti','KaiTi',serif;color:#ae9bb9;line-height:1}.zc-animation-controls{display:flex;justify-content:center;gap:9px;flex-wrap:wrap}.zc-animation-controls .primary{min-width:112px}.zc-board-options{display:flex;justify-content:center;align-items:center;gap:15px;flex-wrap:wrap;margin-top:17px;color:#9c89a8;font-size:11px}.zc-board-options label{display:flex;align-items:center;gap:6px;white-space:nowrap}.zc-board-options select{font-size:11px;color:#8b789a;border:1px solid #e5dcec;border-radius:7px;padding:5px 7px;background:#faf8fc}.zc-board-options input{width:13px;height:13px;accent-color:#9277aa;margin:0}.zc-status{min-height:18px;margin:14px 0 0;text-align:center;font-size:11px;line-height:1.7;color:#a18eac}.zc-retry{border:0;background:none;color:#9b77ae;font-size:11px;text-decoration:underline;display:block;margin:8px auto 0}.zc-explain{display:flex;flex-direction:column;gap:20px}.zc-card-heading{display:flex;align-items:center;gap:11px;margin-bottom:18px}.zc-card-heading h2{font-size:18px;margin:4px 0;color:#756080}.zc-round-label{display:flex;align-items:center;justify-content:center;width:40px;height:40px;flex:none;background:#f0e8f7;color:#967bad;border-radius:12px;font-size:20px}.zc-round-label.green{background:#edf2e7;color:#8ca47b}.zc-structure-facts{display:flex;gap:28px;padding:0 2px 16px;border-bottom:1px solid #f1ebf5}.zc-structure-facts>span{display:flex;flex-direction:column;gap:6px}.zc-structure-facts small{font-size:10px;color:#a895b4}.zc-structure-facts b{font-size:16px;font-weight:500;color:#7d688c}.zc-structure-facts>span:last-child b{color:#7b9467}.zc-decomposition{width:148px;height:126px;margin:20px auto 12px;border:1px solid #ded2e8;border-radius:11px;background:#faf7fd;display:flex;justify-content:center;align-items:stretch;gap:4px;padding:8px}.zc-component{display:flex;justify-content:center;align-items:center;font-size:40px;font-family:'Kaiti SC','STKaiti','KaiTi',serif;min-width:0;flex:1;background:#eee6f5;color:#947baa;border-radius:6px;overflow-wrap:anywhere}.zc-component:nth-child(2){background:#eaf1e2;color:#86a16f}.zc-component:nth-child(3){background:#f6eddf;color:#b79c75}.zc-decomposition.layout-vertical{flex-direction:column}.zc-decomposition.layout-vertical .zc-component{font-size:34px;line-height:1}.zc-decomposition.layout-enclosed{position:relative;padding:8px;background:#eee6f5}.zc-decomposition.layout-enclosed .component-0{position:absolute;left:8px;top:6px;align-items:flex-start;font-size:28px;line-height:1;background:none}.zc-decomposition.layout-enclosed .component-1{position:relative;flex:none;width:70px;height:74px;margin:24px 0 0 24px;border:2px solid #fff}.zc-decomposition.layout-overlap .component-1{margin-left:-16px;margin-top:18px;box-shadow:0 0 0 3px #fff}.zc-component-equation{margin:7px 0 12px;text-align:center;font-size:17px;letter-spacing:3px;color:#a28caf;overflow-wrap:anywhere}.zc-component-equation span{font-size:13px;color:#bbb0c2}.zc-component-equation strong{color:#887297;font-weight:500}.zc-independent{font-size:74px;font-family:'Kaiti SC','STKaiti','KaiTi',serif;line-height:1.4;text-align:center;margin:15px 0 5px;color:#a08bac}.zc-muted,.zc-structure-hint{color:#a28faa;font-size:11px;line-height:1.8;margin:7px 0}.zc-structure-hint{text-align:center}.zc-source{font-size:10px;color:#b09db9;margin-top:13px}.zc-source summary{cursor:pointer}.zc-source p{line-height:1.6;margin:7px 0}.zc-source a{color:#a38bb5;text-decoration:underline}.zc-sentence-panel{background:#fbfdf8;border-color:#e6ecde;flex:1}.zc-phrase{font-size:24px;font-weight:500;letter-spacing:3px;color:#81936e;margin-right:12px}.zc-sentence{padding:17px 18px;margin-top:17px;border-radius:10px;background:#f1f5ec;border:1px dashed #dce6d3;min-height:75px}.zc-sentence p{font-size:13px;line-height:1.9;color:#a7b098;margin:0}.zc-sentence.is-revealed p{color:#768c63;font-size:21px;line-height:1.9}.zc-sentence-actions{display:flex;align-items:center;flex-wrap:wrap;gap:15px;margin-top:16px}.zc-sentence-actions .zc-button{background:#fff;border-color:#dce6d2;color:#8b9f7c}.zc-sentence-actions .zc-text-button{color:#99aa8b;font-size:11px!important}.zc-speech-status{font-size:10px;line-height:1.6;color:#95a282;margin:10px 0 0;min-height:16px}.zc-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:15px;margin-top:23px}.zc-pagination{display:flex;align-items:center;gap:15px}.zc-pagination>span{font-size:12px;color:#a18dad;white-space:nowrap}.zc-pagination strong{color:#856b99}.zc-next-actions{display:flex;align-items:center;gap:18px}.zc-next-actions .zc-button{background:#edf3e7;border-color:#dce7d3;color:#8b9e79}.zc-footnote{text-align:center;font-size:10px;color:#b7a7c1;margin:20px 0 0;line-height:1.7}.zc-empty{padding:70px 20px;text-align:center}.zc-empty h2{font-size:22px}.zc-empty p{color:#a190ac;font-size:13px}.zc-fullscreen-host:fullscreen .zc-classroom{border:0;border-radius:0;overflow-y:auto;width:100vw;height:100vh}.zc-fullscreen-host:fullscreen .zc-classroom .zc-shell{padding:30px 38px}.zc-fullscreen-host:fullscreen .zc-classroom .zc-grid{width:min(100%,410px)}.zc-fullscreen-host:fullscreen .zc-classroom .zc-main{grid-template-columns:minmax(0,1.1fr) minmax(300px,.9fr)}.zc-fullscreen-host:fullscreen .zc-classroom .zc-title h1{font-size:28px}.zc-fullscreen-host:fullscreen .zc-classroom .zc-sentence.is-revealed p{font-size:25px}
@media(max-width:1150px){.zc-shell{padding:21px}.zc-toolbar{gap:13px}.zc-title h1{font-size:21px}.zc-main{grid-template-columns:minmax(0,1fr) minmax(250px,.9fr);gap:16px}.zc-board-panel,.zc-structure-panel,.zc-sentence-panel{padding:19px}.zc-board-heading h2{font-size:20px}.zc-board-options{gap:10px}.zc-grid{max-width:320px}.zc-card-heading h2{font-size:17px}.zc-sentence.is-revealed p{font-size:19px}.zc-pagination{gap:10px}.zc-bottom{justify-content:center}.zc-toolbar-actions{gap:7px}.zc-toolbar-actions .zc-button{padding:8px 10px;font-size:11px!important}}
@media(max-width:850px){.zc-main{grid-template-columns:1fr}.zc-explain{display:grid;grid-template-columns:1fr 1fr;gap:16px}.zc-toolbar{flex-wrap:wrap;gap:12px}.zc-title{min-width:170px}.zc-toolbar-actions{margin-left:auto}.zc-grid{max-width:350px}.zc-board-panel{padding:20px 24px}.zc-fullscreen-host:fullscreen .zc-classroom .zc-main{grid-template-columns:1fr}.zc-fullscreen-host:fullscreen .zc-classroom .zc-shell{padding:20px}.zc-decomposition{width:128px;height:115px}.zc-structure-facts{gap:18px}}
@media(max-width:550px){.zc-classroom{border-radius:15px}.zc-shell{padding:14px}.zc-toolbar{margin-bottom:16px}.zc-toolbar>.zc-button{min-height:35px;padding:6px 10px;font-size:10px!important}.zc-title>span{font-size:9px;letter-spacing:1px}.zc-title h1{font-size:18px;margin:3px 0}.zc-title p{font-size:10px}.zc-toolbar-actions{width:100%;justify-content:flex-end}.zc-toolbar-actions .zc-button{font-size:10px!important;min-height:32px}.zc-word-strip{gap:6px}.zc-word-tab{font-size:14px!important;padding:6px 11px;min-width:35px;min-height:34px}.zc-main{gap:13px}.zc-board-panel{padding:16px 14px}.zc-board-heading{align-items:flex-start}.zc-board-heading h2{margin-left:8px;font-size:20px}.zc-overline{font-size:9px}.zc-count{font-size:10px}.zc-pinyin{font-size:23px;margin-top:14px;min-height:33px}.zc-grid{margin-top:5px;margin-bottom:16px;max-width:300px}.zc-animation-controls{gap:7px}.zc-button{font-size:11px!important;min-height:37px;padding:8px 12px}.zc-animation-controls .primary{min-width:99px}.zc-board-options{font-size:10px;gap:9px}.zc-board-options select{font-size:10px;padding:4px}.zc-status{font-size:10px}.zc-explain{display:flex;gap:13px}.zc-structure-panel,.zc-sentence-panel{padding:18px}.zc-structure-facts{justify-content:center;gap:46px}.zc-card-heading{margin-bottom:15px}.zc-decomposition{width:150px;height:126px}.zc-phrase{font-size:23px}.zc-sentence.is-revealed p{font-size:20px}.zc-bottom{margin-top:17px}.zc-pagination{gap:9px}.zc-pagination>span{font-size:10px}.zc-pagination .zc-button{font-size:10px!important;padding:7px 11px}.zc-next-actions{gap:14px}.zc-next-actions .zc-text-button{font-size:10px!important}.zc-footnote{font-size:9px;margin-top:15px}.zc-fullscreen-host:fullscreen .zc-classroom .zc-shell{padding:14px}}
@media(prefers-reduced-motion:reduce){.zc-classroom *{transition:none!important}}

.zc-fullscreen-host:fullscreen{background:#f8f6fb;overflow-y:auto;width:100vw;height:100vh}.zc-fullscreen-host:fullscreen .zc-classroom{min-height:100%;height:auto;overflow:visible}