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dashed var(--border-subtle);font-size:var(--text-sm);color:var(--text-secondary);line-height:var(--leading-relaxed)}@media (width<=640px){._grid_kbu3t_47{gap:var(--space-2);grid-template-columns:1fr}._arrow_kbu3t_89{padding:var(--space-1) 0;flex-direction:row;justify-content:center}._arrowShape_kbu3t_102{transform:rotate(90deg)}}._figure_1k07d_1{margin:var(--space-6) 0}._caption_1k07d_5{text-align:center;font-size:var(--text-sm);color:var(--text-secondary);margin-bottom:var(--space-2);font-style:italic}._tableWrap_1k07d_13{border:1px solid var(--border-subtle);border-radius:var(--radius-md);background:var(--bg-surface);overflow-x:auto}._table_1k07d_13{border-collapse:collapse;width:100%;font-size:var(--text-sm)}._th_1k07d_26{text-align:left;padding:var(--space-3) var(--space-4);font-weight:var(--weight-semibold);color:var(--text-primary);background:var(--bg-elevated);border-bottom:2px solid var(--accent-primary-dim);white-space:nowrap}._tr_1k07d_36{transition:background var(--transition-fast)}._tr_1k07d_36:nth-child(2n){background:#ffffff05}._tr_1k07d_36:hover{background:var(--accent-primary-glow)}._td_1k07d_48{padding:var(--space-3) var(--space-4);color:var(--text-secondary);border-bottom:1px solid var(--border-subtle);vertical-align:top;line-height:var(--leading-relaxed)}._tr_1k07d_36:last-child ._td_1k07d_48{border-bottom:none}._firstCol_1k07d_60{font-weight:var(--weight-semibold);color:var(--text-primary);white-space:nowrap}@media (width<=640px){._th_1k07d_26,._td_1k07d_48{padding:var(--space-2) var(--space-3)}}._wrap_1b55s_1{margin:var(--space-6) 0;padding:var(--space-4);border-radius:var(--radius-md);background:var(--bg-surface);border:1px solid var(--border-subtle);border-left:3px solid var(--accent-primary)}._header_1b55s_10{align-items:center;gap:var(--space-2);margin-bottom:var(--space-3);flex-wrap:wrap;display:flex}._tag_1b55s_18{font-size:var(--text-xs);font-weight:var(--weight-semibold);color:var(--accent-primary);background:var(--accent-primary-glow);border-radius:var(--radius-full);padding:2px 8px}._title_1b55s_27{font-size:var(--text-sm);font-weight:var(--weight-semibold);color:var(--text-primary);margin:0}._controls_1b55s_34{align-items:center;gap:var(--space-3);display:flex}._playBtn_1b55s_40{border-radius:var(--radius-full);background:var(--accent-primary);width:44px;height:44px;color:var(--bg-void);font-size:var(--text-sm);cursor:pointer;transition:all var(--transition-fast);border:none;flex-shrink:0;justify-content:center;align-items:center;display:flex}._playBtn_1b55s_40:hover{background:var(--accent-primary-hover);transform:scale(1.05)}._playBtn_1b55s_40:focus-visible{outline:2px solid var(--accent-primary);outline-offset:2px}._progressWrap_1b55s_66{flex-direction:column;flex:1;gap:4px;min-width:0;display:flex}._range_1b55s_74{appearance:none;border-radius:var(--radius-full);background:linear-gradient(to right, var(--accent-primary) 0%, var(--accent-primary) var(--progress,0%), var(--bg-elevated) var(--progress,0%), var(--bg-elevated) 100%);cursor:pointer;outline:none;width:100%;height:6px}._range_1b55s_74::-webkit-slider-thumb{appearance:none;background:var(--accent-primary);border:2px solid var(--bg-base);width:14px;height:14px;box-shadow:var(--shadow-sm);cursor:pointer;border-radius:50%}._range_1b55s_74::-moz-range-thumb{background:var(--accent-primary);border:2px solid var(--bg-base);cursor:pointer;border-radius:50%;width:14px;height:14px}._timeRow_1b55s_112{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--text-tertiary);justify-content:space-between;display:flex}._transcriptWrap_1b55s_120{margin-top:var(--space-3);padding-top:var(--space-3);border-top:1px dashed var(--border-subtle)}._transcriptToggle_1b55s_126{align-items:center;gap:var(--space-2);color:var(--text-secondary);font-size:var(--text-xs);cursor:pointer;transition:color var(--transition-fast);background:0 0;border:none;padding:0;display:inline-flex}._transcriptToggle_1b55s_126:hover{color:var(--accent-primary)}._transcript_1b55s_120{margin-top:var(--space-2);padding:var(--space-3);background:var(--bg-void);border-radius:var(--radius-sm);font-size:var(--text-sm);color:var(--text-secondary);line-height:var(--leading-relaxed);white-space:pre-wrap}@media (width<=640px){._controls_1b55s_34{gap:var(--space-2)}._playBtn_1b55s_40{width:38px;height:38px}}._wrap_10mtk_1{margin:var(--space-6) 0;border-radius:var(--radius-md);background:var(--bg-surface);border:1px solid var(--border-subtle);overflow:hidden}._videoWrap_10mtk_9{aspect-ratio:16/9;background:#000;position:relative}._video_10mtk_9{cursor:pointer;width:100%;height:100%;display:block}._centerPlay_10mtk_22{border-radius:var(--radius-full);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border:2px solid var(--accent-primary);width:64px;height:64px;color:var(--accent-primary);font-size:var(--text-xl);cursor:pointer;transition:opacity var(--transition-base);background:#0a0e14b3;justify-content:center;align-items:center;display:flex;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}._centerPlay_10mtk_22:hover{background:var(--accent-primary);color:var(--bg-void)}._controls_10mtk_47{align-items:center;gap:var(--space-3);padding:var(--space-2) var(--space-3);background:var(--bg-elevated);border-bottom:1px solid var(--border-subtle);display:flex}._playBtn_10mtk_56,._pipBtn_10mtk_57{border:1px solid var(--border-default);color:var(--text-secondary);border-radius:var(--radius-sm);cursor:pointer;font-size:var(--text-sm);transition:all var(--transition-fast);background:0 0;flex-shrink:0;padding:4px 10px}._playBtn_10mtk_56:hover,._pipBtn_10mtk_57:hover{color:var(--accent-primary);border-color:var(--accent-primary)}._range_10mtk_75{appearance:none;border-radius:var(--radius-full);background:linear-gradient(to right, var(--accent-primary) 0%, var(--accent-primary) var(--progress,0%), var(--bg-hover) var(--progress,0%), var(--bg-hover) 100%);cursor:pointer;outline:none;flex:1;height:6px}._range_10mtk_75::-webkit-slider-thumb{-webkit-appearance:none;background:var(--accent-primary);cursor:pointer;border-radius:50%;width:12px;height:12px}._range_10mtk_75::-moz-range-thumb{background:var(--accent-primary);cursor:pointer;border:none;border-radius:50%;width:12px;height:12px}._time_10mtk_110{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--text-tertiary);white-space:nowrap}._caption_10mtk_117{padding:var(--space-3) var(--space-4);gap:var(--space-1);flex-direction:column;align-items:flex-start;display:flex}._tag_10mtk_125{font-size:var(--text-xs);font-weight:var(--weight-semibold);color:var(--accent-secondary);border-radius:var(--radius-full);background:#fb923c14;padding:2px 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8px}._concept_lwj62_26{font-size:var(--text-xs);color:var(--text-tertiary)}._question_lwj62_31{font-size:var(--text-base);font-weight:var(--weight-semibold);color:var(--text-primary);margin-bottom:var(--space-4);line-height:var(--leading-relaxed)}._options_lwj62_39{gap:var(--space-2);flex-direction:column;display:flex}._option_lwj62_39{align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);background:var(--bg-elevated);border:1px solid var(--border-default);border-radius:var(--radius-sm);color:var(--text-secondary);font-size:var(--text-sm);text-align:left;cursor:pointer;transition:all var(--transition-fast);display:flex}._option_lwj62_39:not(:disabled):hover{border-color:var(--accent-primary);background:var(--accent-primary-glow);color:var(--text-primary)}._optionKey_lwj62_66{border-radius:var(--radius-full);background:var(--bg-hover);width:22px;height:22px;color:var(--text-tertiary);font-weight:var(--weight-semibold);font-size:var(--text-xs);flex-shrink:0;justify-content:center;align-items:center;display:inline-flex}._optionText_lwj62_80{flex:1}._mark_lwj62_84{font-size:var(--text-base);font-weight:var(--weight-bold);flex-shrink:0}._correct_lwj62_90{border-color:var(--color-success);color:var(--text-primary);background:#4ade801a}._correct_lwj62_90 ._optionKey_lwj62_66{background:var(--color-success);color:var(--bg-void)}._correct_lwj62_90 ._mark_lwj62_84{color:var(--color-success)}._wrong_lwj62_103{border-color:var(--color-danger);color:var(--text-primary);background:#f8717114}._wrong_lwj62_103 ._optionKey_lwj62_66{background:var(--color-danger);color:var(--bg-void)}._wrong_lwj62_103 ._mark_lwj62_84{color:var(--color-danger)}._muted_lwj62_116{opacity:.55}._feedback_lwj62_120{margin-top:var(--space-4);padding:var(--space-3) var(--space-4);border-radius:var(--radius-sm);overflow:hidden}._feedbackCorrect_lwj62_127{background:#4ade8014;border:1px solid #4ade804d}._feedbackWrong_lwj62_132{background:#f8717112;border:1px solid #f871714d}._feedbackTitle_lwj62_137{font-weight:var(--weight-semibold);font-size:var(--text-sm);margin-bottom:var(--space-1)}._feedbackCorrect_lwj62_127 ._feedbackTitle_lwj62_137{color:var(--color-success)}._feedbackWrong_lwj62_132 ._feedbackTitle_lwj62_137{color:var(--color-danger)}._feedbackBody_lwj62_151{font-size:var(--text-sm);color:var(--text-secondary);line-height:var(--leading-relaxed);margin-bottom:var(--space-2)}._resetBtn_lwj62_158{border:1px solid var(--border-default);color:var(--text-secondary);border-radius:var(--radius-sm);font-size:var(--text-xs);cursor:pointer;transition:all var(--transition-fast);background:0 0;padding:4px 12px}._resetBtn_lwj62_158:hover{border-color:var(--accent-primary);color:var(--accent-primary)}@media (width<=640px){._wrap_lwj62_1{padding:var(--space-3)}._option_lwj62_39{padding:var(--space-2) var(--space-3)}}._wrap_1m62p_1{margin:var(--space-6) 0;padding:var(--space-5);border-radius:var(--radius-md);background:var(--bg-surface);border:1px solid var(--border-subtle)}._header_1m62p_9{align-items:center;gap:var(--space-2);margin-bottom:var(--space-3);flex-wrap:wrap;display:flex}._tag_1m62p_17{font-size:var(--text-xs);font-weight:var(--weight-semibold);color:var(--accent-primary);border-radius:var(--radius-full);background:#6366f11a;padding:2px 8px}._langBadge_1m62p_26{font-size:var(--text-xs);font-family:var(--font-mono);color:var(--text-tertiary);background:var(--bg-elevated);border-radius:var(--radius-sm);border:1px solid var(--border-subtle);padding:2px 8px}._concept_1m62p_36{font-size:var(--text-xs);color:var(--text-tertiary)}._prompt_1m62p_41{font-size:var(--text-base);font-weight:var(--weight-semibold);color:var(--text-primary);margin-bottom:var(--space-3);line-height:var(--leading-relaxed)}._codeArea_1m62p_49{margin:var(--space-3) 0;border-radius:var(--radius-md);background:var(--bg-void);border:1px solid var(--border-default);overflow:auto}._code_1m62p_49{padding:var(--space-4);font-family:var(--font-mono);font-size:var(--text-sm);color:#e5e7eb;white-space:pre;tab-size:4;margin:0;line-height:1.6;overflow-x:auto}._code_1m62p_49 code{font-family:inherit;font-size:inherit;color:inherit;white-space:inherit;background:0 0;padding:0}._blankWrap_1m62p_79{vertical-align:baseline;align-items:center;gap:4px;margin:0 2px;display:inline-flex}._blankInput_1m62p_87{font-family:var(--font-mono);font-size:var(--text-sm);border-radius:var(--radius-sm);color:#fbbf24;transition:all var(--transition-fast);background:#ffffff0f;border:1px dashed #ffffff59;outline:none;min-width:6ch;padding:1px 6px}._blankInput_1m62p_87::placeholder{color:#ffffff4d}._blankInput_1m62p_87:focus{border-color:var(--accent-primary);background:#6366f12e;border-style:solid}._blankCorrect_1m62p_110{color:#86efac;border-color:var(--color-success)!important;background:#4ade802e!important;border-style:solid!important}._blankWrong_1m62p_117{color:#fca5a5;border-color:var(--color-danger)!important;background:#f871712e!important;border-style:solid!important}._markCorrect_1m62p_124{color:var(--color-success);font-weight:var(--weight-bold);font-size:var(--text-sm)}._markWrong_1m62p_130{color:var(--color-danger);font-weight:var(--weight-bold);font-size:var(--text-sm)}._actions_1m62p_136{gap:var(--space-2);margin-top:var(--space-3);flex-wrap:wrap;display:flex}._primaryBtn_1m62p_143{background:var(--accent-primary);color:var(--bg-void);border-radius:var(--radius-sm);font-size:var(--text-sm);font-weight:var(--weight-semibold);cursor:pointer;transition:all var(--transition-fast);border:none;padding:6px 16px}._primaryBtn_1m62p_143:hover:not(:disabled){filter:brightness(1.1)}._primaryBtn_1m62p_143:disabled{opacity:.5;cursor:not-allowed}._ghostBtn_1m62p_164{border:1px solid var(--border-default);color:var(--text-secondary);border-radius:var(--radius-sm);font-size:var(--text-sm);cursor:pointer;transition:all var(--transition-fast);background:0 0;padding:6px 14px}._ghostBtn_1m62p_164:hover{border-color:var(--accent-primary);color:var(--accent-primary)}._hintDetails_1m62p_180{margin-top:var(--space-3);padding:var(--space-2) var(--space-3);background:var(--bg-elevated);border:1px solid var(--border-subtle);border-radius:var(--radius-sm)}._hintSummary_1m62p_188{cursor:pointer;font-size:var(--text-xs);color:var(--text-tertiary);font-weight:var(--weight-semibold);-webkit-user-select:none;user-select:none}._hintList_1m62p_196{margin:var(--space-2) 0 0 0;gap:var(--space-1);flex-direction:column;padding-left:0;list-style:none;display:flex}._hintList_1m62p_196 li{font-size:var(--text-xs);align-items:center;gap:var(--space-2);flex-wrap:wrap;display:flex}._hintIdx_1m62p_213{color:var(--accent-secondary);font-weight:var(--weight-semibold);flex-shrink:0}._hintText_1m62p_219{color:var(--text-secondary);flex:1}._hintMuted_1m62p_224{color:var(--text-tertiary)}._miniBtn_1m62p_228{border:1px solid var(--border-default);color:var(--text-tertiary);border-radius:var(--radius-sm);font-size:var(--text-xs);cursor:pointer;font-family:var(--font-mono);transition:all var(--transition-fast);background:0 0;padding:2px 8px}._miniBtn_1m62p_228:hover:not(:disabled){border-color:var(--accent-primary);color:var(--accent-primary)}._miniBtn_1m62p_228:disabled{color:var(--color-success);cursor:default;border-color:#4ade8066}._feedback_1m62p_251{margin-top:var(--space-4);padding:var(--space-3) var(--space-4);border-radius:var(--radius-sm);overflow:hidden}._feedbackCorrect_1m62p_258{background:#4ade8014;border:1px solid #4ade804d}._feedbackWrong_1m62p_263{background:#f8717112;border:1px solid #f871714d}._feedbackInfo_1m62p_268{background:var(--bg-elevated);border:1px solid var(--border-default)}._feedbackTitle_1m62p_273{font-weight:var(--weight-semibold);font-size:var(--text-sm);margin-bottom:var(--space-2)}._feedbackCorrect_1m62p_258 ._feedbackTitle_1m62p_273{color:var(--color-success)}._feedbackWrong_1m62p_263 ._feedbackTitle_1m62p_273{color:var(--color-danger)}._feedbackInfo_1m62p_268 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var(--transition-fast)}._zoomable_1v8vj_22:hover{opacity:.92;transform:scale(1.005)}._caption_1v8vj_32{margin-top:var(--space-2);font-size:var(--text-sm);color:var(--text-secondary);font-style:italic;line-height:var(--leading-relaxed)}._modal_1v8vj_40{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);padding:var(--space-6);z-index:var(--z-modal);cursor:zoom-out;animation:_fadeIn_1v8vj_1 var(--transition-base);background:#0a0e14eb;flex-direction:column;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}@keyframes 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var(--space-2);background:var(--accent-primary-glow);color:var(--accent-primary);border-radius:var(--radius-sm);font-size:var(--text-xs);font-weight:var(--weight-semibold)}._prereqs_4hk5m_89{align-items:center;gap:var(--space-2);margin-top:var(--space-4);font-size:var(--text-sm);flex-wrap:wrap;display:flex}._prereqLabel_4hk5m_98{color:var(--text-tertiary)}._prereqLink_4hk5m_102{padding:var(--space-1) var(--space-2);background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--accent-secondary);font-size:var(--text-xs);transition:all var(--transition-fast);text-decoration:none}._prereqLink_4hk5m_102:hover{border-color:var(--accent-secondary);background:var(--bg-hover)}._content_4hk5m_119{font-size:var(--text-lg);line-height:var(--leading-relaxed);color:var(--text-primary)}._content_4hk5m_119 h2{font-size:var(--text-2xl);margin:var(--space-8) 0 var(--space-4);padding-bottom:var(--space-2);border-bottom:1px solid 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var(--space-4);font-size:var(--text-base)}._concepts_4hk5m_245{text-align:left;background:var(--bg-elevated);border-radius:var(--radius-md);padding:var(--space-5);margin:var(--space-5) auto;max-width:480px}._concepts_4hk5m_245 h3{font-size:var(--text-base);color:var(--accent-secondary);margin-bottom:var(--space-2)}._concepts_4hk5m_245 ul{padding:0;list-style:none}._concepts_4hk5m_245 li{padding:var(--space-1) 0;padding-left:var(--space-4);font-size:var(--text-sm);position:relative}._concepts_4hk5m_245 li:before{content:"◆";color:var(--accent-primary);font-size:var(--text-xs);position:absolute;left:0}._placeholderHint_4hk5m_280{margin-top:var(--space-4);font-size:var(--text-sm)}._inlineLink_4hk5m_285{color:var(--accent-primary);margin:0 var(--space-1);text-decoration:underline}._chapterNav_4hk5m_292{margin-top:var(--space-12);padding-top:var(--space-6);border-top:1px solid 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var(--space-4);border-radius:var(--radius-sm);color:inherit;transition:background var(--transition-fast);justify-content:space-between;align-items:center;text-decoration:none;display:flex}._chapterItem_1tiyi_101:hover{background:var(--bg-hover)}._chapterLeft_1tiyi_116{align-items:baseline;gap:var(--space-3);display:flex}._chapterNum_1tiyi_122{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--text-tertiary);min-width:36px}._chapterTitleRow_1tiyi_129{font-size:var(--text-sm);color:var(--text-primary);align-items:center;gap:var(--space-2);display:flex}._coreTag_1tiyi_137{font-size:var(--text-xs);padding:1px 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var(--border-subtle)}._emptyIcon_q1qe4_13{font-size:var(--text-5xl);color:var(--accent-primary);margin-bottom:var(--space-4)}._empty_q1qe4_6 h2{font-size:var(--text-xl);color:var(--text-secondary);margin-bottom:var(--space-3)}._empty_q1qe4_6 p{color:var(--text-tertiary);margin-bottom:var(--space-5);font-size:var(--text-sm)}._cta_q1qe4_16{padding:var(--space-3) var(--space-6);background:var(--accent-primary);color:var(--bg-void);border-radius:var(--radius-md);font-weight:var(--weight-semibold);transition:all var(--transition-fast);text-decoration:none;display:inline-block}._cta_q1qe4_16:hover{background:var(--accent-primary-hover)}._statsGrid_q1qe4_28{gap:var(--space-3);margin-bottom:var(--space-8);grid-template-columns:repeat(4,1fr);display:grid}@media (width<=640px){._statsGrid_q1qe4_28{grid-template-columns:repeat(2,1fr)}}._statCard_q1qe4_36{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:var(--space-4);text-align:center}._statValue_q1qe4_43{font-size:var(--text-2xl);font-family:var(--font-mono);color:var(--accent-primary);font-weight:var(--weight-bold)}._statLabel_q1qe4_49{font-size:var(--text-xs);color:var(--text-secondary);margin-top:var(--space-1);text-transform:uppercase;letter-spacing:.05em}._statSub_q1qe4_56{font-size:var(--text-xs);color:var(--text-tertiary);margin-top:2px}._section_q1qe4_58{margin-bottom:var(--space-8)}._sectionTitle_q1qe4_59{font-size:var(--text-lg);margin-bottom:var(--space-3);color:var(--text-primary)}._chapterList_q1qe4_65{gap:var(--space-1);flex-direction:column;display:flex}._chapterRow_q1qe4_66{padding:var(--space-3) var(--space-4);background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:inherit;transition:border-color var(--transition-fast);justify-content:space-between;align-items:center;text-decoration:none;display:flex}._chapterRow_q1qe4_66:hover{border-color:var(--accent-primary)}._chapterInfo_q1qe4_80{gap:var(--space-3);align-items:baseline;display:flex}._chapterNum_q1qe4_81{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--text-tertiary);min-width:36px}._chapterName_q1qe4_87{font-size:var(--text-sm);color:var(--text-primary)}._chapterMeta_q1qe4_88{font-size:var(--text-xs);color:var(--text-tertiary);margin-top:2px}._progressCol_q1qe4_90{align-items:center;gap:var(--space-2);min-width:140px;display:flex}._progressBar_q1qe4_91{background:var(--bg-elevated);border-radius:var(--radius-full);flex:1;height:4px;overflow:hidden}._progressFill_q1qe4_98{background:var(--accent-primary);border-radius:var(--radius-full);height:100%;transition:width var(--transition-base)}._progressText_q1qe4_104{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--accent-primary);text-align:right;min-width:36px}._bookmarkList_q1qe4_112{gap:var(--space-1);flex-direction:column;display:flex}._bookmark_q1qe4_112{align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-primary);font-size:var(--text-sm);text-decoration:none;display:flex}._bookmark_q1qe4_112:hover{border-color:var(--accent-secondary)}._bookmarkIcon_q1qe4_126{color:var(--accent-secondary)}._bookmarkNote_q1qe4_127{color:var(--text-tertiary);font-size:var(--text-xs);margin-left:auto}._danger_q1qe4_129{margin-top:var(--space-10);padding-top:var(--space-6);border-top:1px solid var(--border-subtle)}._resetBtn_q1qe4_130{padding:var(--space-2) var(--space-4);border:1px solid var(--color-danger);color:var(--color-danger);border-radius:var(--radius-md);cursor:pointer;font-size:var(--text-sm);transition:all var(--transition-fast);background:0 0;font-family:inherit}._resetBtn_q1qe4_130:hover{background:var(--color-danger);color:var(--bg-void)}._container_1663n_1{max-width:880px;margin:0 auto}._header_1663n_7{justify-content:space-between;align-items:flex-end;gap:var(--space-4);margin-bottom:var(--space-8);padding-bottom:var(--space-5);border-bottom:1px solid var(--border-subtle);flex-wrap:wrap;display:flex}._headerLeft_1663n_18{flex:1;min-width:240px}._title_1663n_23{font-size:var(--text-3xl);margin-bottom:var(--space-2);color:var(--text-primary)}._subtitle_1663n_29{color:var(--text-secondary);font-size:var(--text-sm)}._modeSwitch_1663n_34{gap:var(--space-1);background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:var(--space-1);display:flex}._modeBtn_1663n_43{color:var(--text-secondary);padding:var(--space-2) var(--space-4);border-radius:var(--radius-sm);cursor:pointer;font-size:var(--text-sm);transition:all var(--transition-fast);background:0 0;border:none;font-family:inherit}._modeBtn_1663n_43:hover{color:var(--text-primary)}._modeBtnActive_1663n_59{background:var(--accent-primary-glow);color:var(--accent-primary);font-weight:var(--weight-semibold)}._empty_1663n_66{text-align:center;padding:var(--space-16) var(--space-6);background:var(--bg-surface);border-radius:var(--radius-lg);border:1px solid var(--border-subtle)}._emptyIcon_1663n_74{font-size:var(--text-5xl);color:var(--accent-secondary);margin-bottom:var(--space-4);opacity:.7}._emptyTitle_1663n_81{font-size:var(--text-xl);color:var(--text-secondary);margin-bottom:var(--space-3)}._emptyText_1663n_87{color:var(--text-tertiary);max-width:460px;margin:0 auto var(--space-5);font-size:var(--text-sm);line-height:var(--leading-normal)}._cta_1663n_95{padding:var(--space-3) var(--space-6);background:var(--accent-primary);color:var(--bg-void);border-radius:var(--radius-md);font-weight:var(--weight-semibold);font-size:var(--text-sm);transition:all var(--transition-fast);text-decoration:none;display:inline-block}._cta_1663n_95:hover{background:var(--accent-primary-hover)}._groupToggle_1663n_112{align-items:center;gap:var(--space-2);margin-bottom:var(--space-6);font-size:var(--text-sm);display:flex}._groupLabel_1663n_120{color:var(--text-tertiary)}._groupBtn_1663n_124{border:1px solid var(--border-subtle);color:var(--text-secondary);padding:var(--space-1) var(--space-3);border-radius:var(--radius-sm);cursor:pointer;font-family:inherit;font-size:var(--text-xs);transition:all var(--transition-fast);background:0 0}._groupBtn_1663n_124:hover{border-color:var(--accent-primary);color:var(--text-primary)}._groupBtnActive_1663n_141{border-color:var(--accent-primary);color:var(--accent-primary);background:var(--accent-primary-glow)}._group_1663n_112{margin-bottom:var(--space-8)}._groupTitle_1663n_151{font-size:var(--text-lg);margin-bottom:var(--space-3);padding-bottom:var(--space-2);border-bottom:1px solid var(--border-subtle);text-transform:uppercase;letter-spacing:.04em}._groupCount_1663n_160{font-size:var(--text-sm);color:var(--text-tertiary);font-weight:var(--weight-normal)}._cards_1663n_166{gap:var(--space-4);flex-direction:column;display:flex}._card_1663n_166{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);transition:border-color var(--transition-fast);overflow:hidden}._card_1663n_166:hover{border-color:var(--border-strong)}._cardHeader_1663n_185{align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);background:var(--bg-elevated);border-bottom:1px solid var(--border-subtle);display:flex}._cardChapter_1663n_194{align-items:baseline;gap:var(--space-2);color:var(--text-secondary);min-width:0;transition:color var(--transition-fast);flex:1;text-decoration:none;display:flex}._cardChapter_1663n_194:hover{color:var(--accent-primary)}._cardChapterNum_1663n_209{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--accent-secondary);flex-shrink:0}._cardChapterTitle_1663n_216{font-size:var(--text-sm);font-weight:var(--weight-medium);white-space:nowrap;text-overflow:ellipsis;overflow:hidden}._cardType_1663n_224{font-size:var(--text-xs);color:var(--text-tertiary);padding:var(--space-1) var(--space-2);background:var(--bg-base);border-radius:var(--radius-sm);border:1px solid var(--border-subtle);flex-shrink:0}._cardRemove_1663n_234{color:var(--text-tertiary);cursor:pointer;font-size:var(--text-sm);padding:var(--space-1);border-radius:var(--radius-sm);transition:all var(--transition-fast);background:0 0;border:none;flex-shrink:0}._cardRemove_1663n_234:hover{color:var(--color-danger);background:var(--bg-hover)}._cardBody_1663n_251{padding:var(--space-4) var(--space-5);font-size:var(--text-base);line-height:var(--leading-normal);color:var(--text-primary)}._cardBody_1663n_251 h2,._cardBody_1663n_251 h3,._cardBody_1663n_251 h4{margin-top:0}._cardFooter_1663n_265{border-top:1px solid var(--border-subtle);padding:var(--space-3) var(--space-4);background:var(--bg-base)}._noteView_1663n_272{align-items:center;gap:var(--space-2);font-size:var(--text-sm);flex-wrap:wrap;display:flex}._noteLabel_1663n_280{color:var(--accent-secondary);flex-shrink:0}._noteText_1663n_285{color:var(--text-primary);flex:1;min-width:0}._noteToggle_1663n_291,._noteAdd_1663n_292{color:var(--accent-primary);cursor:pointer;font-family:inherit;font-size:var(--text-xs);padding:var(--space-1) var(--space-2);border-radius:var(--radius-sm);transition:all var(--transition-fast);background:0 0;border:none}._noteToggle_1663n_291:hover,._noteAdd_1663n_292:hover{background:var(--accent-primary-glow)}._noteAdd_1663n_292{color:var(--text-tertiary)}._noteEditor_1663n_313{gap:var(--space-2);flex-direction:column;display:flex}._noteTextarea_1663n_319{background:var(--bg-surface);border:1px solid var(--border-default);border-radius:var(--radius-sm);width:100%;color:var(--text-primary);font-family:var(--font-sans);font-size:var(--text-sm);padding:var(--space-2) var(--space-3);resize:vertical;transition:border-color var(--transition-fast);outline:none}._noteTextarea_1663n_319:focus{border-color:var(--accent-primary)}._noteActions_1663n_337{justify-content:flex-end;gap:var(--space-2);display:flex}._noteBtn_1663n_343{border:1px solid var(--border-default);color:var(--text-secondary);border-radius:var(--radius-sm);padding:var(--space-1) var(--space-3);font-size:var(--text-xs);cursor:pointer;transition:all var(--transition-fast);background:0 0;font-family:inherit}._noteBtn_1663n_343:hover{border-color:var(--text-secondary);color:var(--text-primary)}._noteSave_1663n_360{background:var(--accent-primary);border-color:var(--accent-primary);color:var(--bg-void);font-weight:var(--weight-semibold)}._noteSave_1663n_360:hover{background:var(--accent-primary-hover);border-color:var(--accent-primary-hover);color:var(--bg-void)}._loading_1663n_373{padding:var(--space-12);text-align:center;color:var(--text-tertiary);font-size:var(--text-sm)}._flashcard_1663n_383{max-width:640px;margin:0 auto}._flashProgress_1663n_388{align-items:center;gap:var(--space-3);font-size:var(--text-sm);color:var(--text-secondary);margin-bottom:var(--space-6);display:flex}._flashNum_1663n_397{color:var(--accent-primary);font-family:var(--font-mono)}._flashBar_1663n_402{background:var(--bg-elevated);border-radius:var(--radius-full);flex:1;height:4px;overflow:hidden}._flashBarFill_1663n_410{background:var(--accent-primary);border-radius:var(--radius-full);height:100%;transition:width var(--transition-base)}._flashStat_1663n_417{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--text-tertiary)}._flashCounter_1663n_423{align-items:baseline;gap:var(--space-1);font-family:var(--font-mono);font-size:var(--text-sm);color:var(--text-tertiary);margin-bottom:var(--space-3);justify-content:center;display:flex}._flashCounterSep_1663n_434,._flashCounterTotal_1663n_438{color:var(--text-tertiary)}._flashCardScene_1663n_443{perspective:1200px;cursor:pointer;width:100%;height:360px;margin-bottom:var(--space-4)}._flashCard3d_1663n_451{width:100%;height:100%;transform-style:preserve-3d;transition:transform .5s cubic-bezier(.4,0,.2,1);position:relative}._flashCardFlipped_1663n_459{transform:rotateY(180deg)}._flashFace_1663n_463{backface-visibility:hidden;background:var(--bg-surface);border:1px solid var(--border-default);border-radius:var(--radius-lg);width:100%;height:100%;padding:var(--space-6);flex-direction:column;display:flex;position:absolute;top:0;left:0;overflow-y:auto}._flashFront_1663n_480{text-align:center;justify-content:center;align-items:center;gap:var(--space-3)}._flashBack_1663n_487{text-align:left;transform:rotateY(180deg)}._flashLabel_1663n_492{font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.08em;color:var(--text-tertiary)}._flashChapter_1663n_499{font-size:var(--text-xl);font-weight:var(--weight-semibold);color:var(--text-primary)}._flashType_1663n_505{font-size:var(--text-xs);color:var(--accent-secondary);padding:var(--space-1) var(--space-3);border:1px solid var(--accent-secondary);border-radius:var(--radius-full)}._flashHint_1663n_513{font-size:var(--text-base);color:var(--text-secondary);max-width:420px;line-height:var(--leading-normal)}._flashMyNote_1663n_520{margin-top:var(--space-3);padding:var(--space-2) var(--space-3);background:var(--bg-elevated);border-radius:var(--radius-sm);font-size:var(--text-sm);color:var(--text-secondary);max-width:420px}._flashMyNoteLabel_1663n_530{color:var(--accent-secondary);margin-right:var(--space-1)}._flashHintBottom_1663n_535{font-size:var(--text-xs);color:var(--text-tertiary);padding-top:var(--space-4);margin-top:auto}._flashContent_1663n_542{font-size:var(--text-sm);line-height:var(--leading-normal);color:var(--text-primary);margin-top:var(--space-2)}._flashContent_1663n_542 h2,._flashContent_1663n_542 h3,._flashContent_1663n_542 h4{margin-top:0}._flashControls_1663n_556{gap:var(--space-2);margin-bottom:var(--space-3);flex-wrap:wrap;justify-content:center;display:flex}._flashNav_1663n_564,._flashMark_1663n_565{background:var(--bg-elevated);border:1px solid var(--border-default);color:var(--text-secondary);padding:var(--space-2) var(--space-4);border-radius:var(--radius-md);cursor:pointer;font-family:inherit;font-size:var(--text-sm);transition:all var(--transition-fast)}._flashNav_1663n_564:hover:not(:disabled){border-color:var(--accent-primary);color:var(--accent-primary)}._flashNav_1663n_564:disabled{opacity:.4;cursor:not-allowed}._flashMarkKnown_1663n_587{border-color:var(--color-success);color:var(--color-success)}._flashMarkKnown_1663n_587:hover{background:var(--color-success);color:var(--bg-void)}._flashMarkUnknown_1663n_597{border-color:var(--color-danger);color:var(--color-danger)}._flashMarkUnknown_1663n_597:hover{background:var(--color-danger);color:var(--bg-void)}._flashKb_1663n_607{text-align:center;font-size:var(--text-xs);color:var(--text-tertiary)}._flashKb_1663n_607 kbd{font-family:var(--font-mono);background:var(--bg-elevated);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:0 4px}._flashDone_1663n_622{text-align:center;padding:var(--space-12) var(--space-6);background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg)}._flashDoneIcon_1663n_630{font-size:var(--text-5xl);color:var(--color-success);margin-bottom:var(--space-3)}._flashDone_1663n_622 h3{font-size:var(--text-xl);color:var(--text-primary);margin-bottom:var(--space-2)}._flashDone_1663n_622 p{color:var(--text-secondary);font-size:var(--text-sm);margin-bottom:var(--space-5)}._flashKnown_1663n_648{color:var(--color-success);margin:0 var(--space-1)}._flashUnknown_1663n_653{color:var(--color-danger);margin:0 var(--space-1)}._flashBtn_1663n_658{background:var(--accent-primary);color:var(--bg-void);padding:var(--space-3) var(--space-6);border-radius:var(--radius-md);cursor:pointer;font-family:inherit;font-size:var(--text-sm);font-weight:var(--weight-semibold);transition:all var(--transition-fast);border:none}._flashBtn_1663n_658:hover{background:var(--accent-primary-hover)}._container_ljiuw_1{max-width:720px;margin:0 auto}._header_ljiuw_2{margin-bottom:var(--space-8)}._title_ljiuw_3{font-size:var(--text-3xl);margin-bottom:var(--space-2)}._subtitle_ljiuw_4{color:var(--text-secondary)}._section_ljiuw_5{margin-bottom:var(--space-8)}._h2_ljiuw_6{font-size:var(--text-xl);color:var(--accent-primary);margin-bottom:var(--space-3)}._section_ljiuw_5 p{color:var(--text-secondary);line-height:var(--leading-relaxed)}._stack_ljiuw_15{gap:var(--space-2);grid-template-columns:repeat(auto-fill,minmax(280px,1fr));padding:0;list-style:none;display:grid}._stack_ljiuw_15 li{padding:var(--space-2) var(--space-3);background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);font-size:var(--text-sm);color:var(--text-secondary)}._stack_ljiuw_15 strong{color:var(--text-primary)}._principles_ljiuw_31{gap:var(--space-4);grid-template-columns:repeat(2,1fr);display:grid}@media (width<=640px){._principles_ljiuw_31{grid-template-columns:1fr}}._principle_ljiuw_31{padding:var(--space-4);background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);border-left:3px solid var(--accent-primary)}._principle_ljiuw_31 h3{font-size:var(--text-base);color:var(--text-primary);margin-bottom:var(--space-2)}._principle_ljiuw_31 p{font-size:var(--text-sm);color:var(--text-secondary)}blockquote{border-left:3px solid var(--accent-secondary);background:var(--bg-surface);padding:var(--space-4);border-radius:0 var(--radius-md) var(--radius-md) 0;margin-bottom:var(--space-4)}blockquote p{color:var(--text-secondary);margin-bottom:var(--space-1);font-size:var(--text-sm)}blockquote a{color:var(--accent-primary)}._copyright_ljiuw_51{font-size:var(--text-xs);color:var(--text-tertiary)}._container_1nm9x_1{text-align:center;padding:var(--space-20) var(--space-4)}._code_1nm9x_5{font-family:var(--font-mono);font-size:var(--text-5xl);color:var(--accent-primary);font-weight:var(--weight-bold);margin-bottom:var(--space-4)}._title_1nm9x_12{font-size:var(--text-2xl);margin-bottom:var(--space-3);color:var(--text-secondary)}._desc_1nm9x_13{color:var(--text-tertiary);margin-bottom:var(--space-6);font-size:var(--text-sm)}._link_1nm9x_14{color:var(--accent-primary);padding:var(--space-2) var(--space-4);border:1px solid var(--accent-primary);border-radius:var(--radius-md);transition:all var(--transition-fast);text-decoration:none;display:inline-block}._link_1nm9x_14:hover{background:var(--accent-primary);color:var(--bg-void)}