.navbar[data-v-e674abf8]{z-index:100;height:var(--nav-height);background:var(--card-bg);border-bottom:1px solid var(--border-color);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:background-color .3s,border-color .3s;position:fixed;top:0;left:0;right:0}.nav-inner[data-v-e674abf8]{align-items:center;gap:16px;max-width:960px;height:100%;margin:0 auto;padding:0 20px;display:flex}.nav-brand[data-v-e674abf8]{cursor:pointer;background:linear-gradient(135deg, var(--accent), var(--accent-hover));-webkit-text-fill-color:transparent;white-space:nowrap;-webkit-background-clip:text;background-clip:text;font-size:18px;font-weight:800}.nav-links[data-v-e674abf8]{flex:1;gap:4px;display:flex}.nav-actions[data-v-e674abf8]{align-items:center;gap:10px;display:flex}.nav-user[data-v-e674abf8]{color:var(--text-secondary);text-overflow:ellipsis;white-space:nowrap;max-width:80px;font-size:13px;overflow:hidden}.theme-picker[data-v-e674abf8]{flex-direction:column;gap:2px;display:flex}.theme-option[data-v-e674abf8]{cursor:pointer;border-radius:8px;align-items:center;gap:10px;padding:8px 12px;transition:background .15s;display:flex}.theme-option[data-v-e674abf8]:hover{background:var(--bg-secondary)}.theme-option.active[data-v-e674abf8]{background:var(--accent-light)}.theme-swatch[data-v-e674abf8]{border:1.5px solid var(--border-color);border-radius:50%;flex-shrink:0;width:14px;height:14px}.theme-icon[data-v-e674abf8]{font-size:14px}.theme-label[data-v-e674abf8]{color:var(--text-primary);flex:1;font-size:13px;font-weight:500}.theme-option.active .theme-label[data-v-e674abf8]{color:var(--accent);font-weight:600}.theme-check[data-v-e674abf8]{color:var(--accent);font-size:13px;font-weight:700}@media (max-width:640px){.nav-links[data-v-e674abf8]{display:none}.nav-inner[data-v-e674abf8]{padding:0 12px}}#app-root[data-v-beb91512]{background:var(--bg);min-height:100vh}.question-card[data-v-0926f1f2]{position:relative;overflow:visible}.question-context[data-v-0926f1f2]{flex-wrap:wrap;gap:8px;padding:10px 20px 0;display:flex}.ctx-tag[data-v-0926f1f2]{border-radius:10px;padding:2px 10px;font-size:12px;font-weight:500}.ctx-subject[data-v-0926f1f2]{background:var(--el-color-primary-light-9);color:var(--el-color-primary)}.ctx-chapter[data-v-0926f1f2]{background:var(--el-color-success-light-9);color:var(--el-color-success)}.question-header[data-v-0926f1f2]{cursor:pointer;-webkit-user-select:none;user-select:none;align-items:flex-start;gap:12px;padding:18px 20px;display:flex}.question-text[data-v-0926f1f2]{flex:1;font-size:15px;font-weight:500;line-height:1.6}.fav-star-btn[data-v-0926f1f2]{cursor:pointer;color:var(--text-secondary);opacity:.6;flex-shrink:0;margin-top:0;font-size:20px;line-height:1;transition:all .2s}.fav-star-btn[data-v-0926f1f2]:hover{opacity:1;transform:scale(1.15)}.fav-star-btn.favorited[data-v-0926f1f2]{color:#f0b429;opacity:1}.toggle-icon[data-v-0926f1f2]{color:var(--text-secondary);flex-shrink:0;margin-top:4px;font-size:12px;transition:transform .3s}.toggle-icon.expanded[data-v-0926f1f2]{transform:rotate(180deg)}.question-body[data-v-0926f1f2]{padding:0 20px 20px}.answer-box[data-v-0926f1f2]{margin-bottom:12px}.answer-content[data-v-0926f1f2]{flex-direction:column;gap:4px;display:flex}.label[data-v-0926f1f2]{text-transform:uppercase;letter-spacing:1px;font-size:12px;font-weight:700}.answer-text[data-v-0926f1f2]{font-size:15px;font-weight:600}.explanation-box[data-v-0926f1f2]{background:var(--bg-secondary);border-left:4px solid var(--accent);border-radius:0 8px 8px 0;padding:14px 16px}.explanation-box .label[data-v-0926f1f2]{color:var(--accent)}.explanation-text[data-v-0926f1f2]{font-size:14px;line-height:1.8}.fav-picker[data-v-0926f1f2]{z-index:10;background:var(--card-bg);border:1px solid var(--border-color);border-radius:12px;min-width:180px;padding:4px;animation:.15s favPickerIn-0926f1f2;position:absolute;top:52px;right:16px;box-shadow:0 8px 30px #00000026}@keyframes favPickerIn-0926f1f2{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.fav-picker-title[data-v-0926f1f2]{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;padding:8px 12px 4px;font-size:11px;font-weight:700}.fav-option[data-v-0926f1f2]{cursor:pointer;color:var(--text-primary);border-radius:8px;align-items:center;gap:8px;padding:8px 12px;font-size:13px;transition:background .15s;display:flex}.fav-option[data-v-0926f1f2]:hover{background:var(--bg-secondary)}.fav-star[data-v-0926f1f2]{color:var(--text-secondary);font-size:14px;transition:color .15s}.fav-star.filled[data-v-0926f1f2]{color:#f0b429}.fav-folder-name[data-v-0926f1f2]{flex:1}.fav-empty[data-v-0926f1f2]{color:var(--text-secondary);text-align:center;padding:12px;font-size:12px}.slide-enter-active[data-v-0926f1f2],.slide-leave-active[data-v-0926f1f2]{opacity:1;max-height:1000px;transition:all .3s}.slide-enter-from[data-v-0926f1f2],.slide-leave-to[data-v-0926f1f2]{opacity:0;max-height:0}.chapter-header[data-v-4511a759]{margin-bottom:24px}.ch-info[data-v-4511a759]{margin:12px 0}.ch-desc[data-v-4511a759]{color:var(--text-secondary);font-size:14px}.ch-meta[data-v-4511a759]{align-items:center;gap:12px;display:flex}.questions-list[data-v-4511a759]{flex-direction:column;gap:12px;padding-bottom:40px;display:flex}.question-wrapper[data-v-4511a759]{position:relative}.q-actions[data-v-4511a759]{gap:8px;padding:0 20px 8px;display:flex}.fav-header[data-v-48a1da20]{margin-bottom:8px}.fav-summary[data-v-48a1da20]{color:var(--text-secondary);margin-top:-16px;margin-bottom:20px;font-size:13px}.folders-bar[data-v-48a1da20]{background:var(--bg-secondary);border-radius:var(--radius);flex-wrap:wrap;gap:8px;margin-bottom:24px;padding:16px;transition:background-color .3s;display:flex}.folder-tab[data-v-48a1da20]{background:var(--card-bg);color:var(--text-primary);border:1.5px solid var(--border-color);cursor:pointer;-webkit-user-select:none;user-select:none;border-radius:20px;align-items:center;gap:6px;padding:6px 14px;font-size:13px;font-weight:600;transition:all .2s;display:inline-flex}.folder-tab.active[data-v-48a1da20]{background:var(--accent);color:#fff;border-color:var(--accent)}.folder-tab[data-v-48a1da20]:hover:not(.active){border-color:var(--accent);color:var(--accent)}.folder-count[data-v-48a1da20]{text-align:center;background:#ffffff4d;border-radius:10px;min-width:18px;padding:0 7px;font-size:11px;font-weight:700}.folder-tab:not(.active) .folder-count[data-v-48a1da20]{background:var(--accent-light);color:var(--accent)}.folder-del[data-v-48a1da20]{opacity:.4;border-radius:50%;justify-content:center;align-items:center;width:16px;height:16px;margin-left:2px;font-size:10px;transition:all .15s;display:flex}.folder-del[data-v-48a1da20]:hover{opacity:1;background:#fff3}.folder-tab:not(.active) .folder-del[data-v-48a1da20]:hover{color:#ef4444;background:#ef44441a}.folder-add[data-v-48a1da20]{color:var(--accent);border:1.5px dashed var(--accent);cursor:pointer;background:0 0;border-radius:20px;align-items:center;padding:6px 14px;font-family:inherit;font-size:13px;font-weight:600;transition:all .2s;display:inline-flex}.folder-add[data-v-48a1da20]:hover{background:var(--accent-light)}.empty-state[data-v-48a1da20]{text-align:center;padding:60px 20px}.empty-illustration[data-v-48a1da20]{opacity:.85;margin-bottom:16px;font-size:56px}.empty-title[data-v-48a1da20]{color:var(--text-primary);margin-bottom:8px;font-size:18px;font-weight:700}.empty-desc[data-v-48a1da20]{color:var(--text-secondary);margin-bottom:20px;font-size:14px}.chapter-group[data-v-48a1da20]{background:var(--bg-secondary);border-radius:var(--radius);border:1px solid var(--border-color);margin-bottom:20px;padding:16px;transition:background-color .3s,border-color .3s}.group-title[data-v-48a1da20]{color:var(--accent);border-left:3px solid var(--accent);margin-bottom:12px;padding-left:10px;font-size:14px;font-weight:700}.group-list[data-v-48a1da20]{flex-direction:column;gap:10px;display:flex}.fav-wrapper[data-v-48a1da20]{background:var(--card-bg);border:1px solid var(--border-color);border-radius:10px;transition:box-shadow .2s;position:relative;overflow:visible}.fav-wrapper[data-v-48a1da20]:hover{box-shadow:var(--shadow)}.unfav-btn[data-v-48a1da20]{z-index:5;opacity:0;color:#ef4444;cursor:pointer;background:#ef44441a;border:none;border-radius:50%;justify-content:center;align-items:center;width:24px;height:24px;font-size:11px;transition:opacity .2s;display:flex;position:absolute;top:8px;right:8px}.fav-wrapper:hover .unfav-btn[data-v-48a1da20]{opacity:1}.unfav-btn[data-v-48a1da20]:hover{background:#ef444433}.hero[data-v-6c6f870a]{text-align:center;padding:40px 20px 32px}.hero-title[data-v-6c6f870a]{background:linear-gradient(135deg,#667eea,#764ba2);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:8px;font-size:36px;font-weight:800}.hero-subtitle[data-v-6c6f870a]{color:var(--text-secondary);margin-bottom:28px;font-size:15px}.hero-stats[data-v-6c6f870a]{justify-content:center;gap:40px;margin-bottom:28px;display:flex}.stat[data-v-6c6f870a]{flex-direction:column;align-items:center;display:flex}.stat-num[data-v-6c6f870a]{font-size:28px;font-weight:800}.stat-label[data-v-6c6f870a]{color:var(--text-secondary);font-size:12px}.hero-actions[data-v-6c6f870a]{justify-content:center;gap:12px;display:flex}.subject-grid[data-v-6c6f870a]{flex-direction:column;gap:10px;padding-bottom:40px;display:flex}.subject-card[data-v-6c6f870a]{cursor:pointer;transition:all .2s}.subject-card:hover .card-arrow[data-v-6c6f870a]{color:var(--accent);transform:translate(4px)}.card-body[data-v-6c6f870a]{align-items:center;gap:16px;display:flex}.card-icon[data-v-6c6f870a]{background:var(--bg-secondary);border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;width:48px;height:48px;font-size:28px;display:flex}.card-content[data-v-6c6f870a]{flex:1;min-width:0}.card-title[data-v-6c6f870a]{margin-bottom:2px;font-size:16px;font-weight:700}.card-desc[data-v-6c6f870a]{color:var(--text-secondary);white-space:nowrap;text-overflow:ellipsis;font-size:13px;overflow:hidden}.card-arrow[data-v-6c6f870a]{color:var(--text-secondary);font-size:16px;transition:transform .2s}@media (max-width:640px){.hero[data-v-6c6f870a]{padding:24px 12px 20px}.hero-title[data-v-6c6f870a]{font-size:28px}.hero-stats[data-v-6c6f870a]{gap:24px}}.login-page[data-v-2a947150]{justify-content:center;align-items:center;min-height:100vh;padding:20px;display:flex}.login-card[data-v-2a947150]{background:var(--card-bg);border:1px solid var(--border-color);border-radius:16px;width:100%;max-width:400px;padding:40px 32px}.login-header[data-v-2a947150]{text-align:center;margin-bottom:32px}.login-icon[data-v-2a947150]{margin-bottom:12px;font-size:48px}.login-header h1[data-v-2a947150]{color:var(--text-primary);font-size:28px;font-weight:800}.login-header p[data-v-2a947150]{color:var(--text-secondary);margin-top:6px;font-size:14px}.login-form[data-v-2a947150]{flex-direction:column;gap:4px;display:flex}.error-msg[data-v-2a947150]{color:#ef4444;text-align:center;margin:-8px 0;font-size:13px}.switch-link[data-v-2a947150]{text-align:center;color:var(--text-secondary);margin-top:4px;font-size:13px}.manage-layout[data-v-114cc214]{flex-direction:column;gap:24px;display:flex}.section-title[data-v-114cc214]{margin-bottom:6px;font-size:18px;font-weight:700}.section-desc[data-v-114cc214]{color:var(--text-secondary);margin-bottom:16px;font-size:13px}.import-tabs[data-v-114cc214]{gap:8px;margin-bottom:12px;display:flex}.json-area[data-v-114cc214] .el-textarea__inner{font-family:Consolas,Monaco,monospace;font-size:13px;line-height:1.6}.import-actions[data-v-114cc214]{margin-top:12px}.section-header[data-v-114cc214]{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.section-header-inline[data-v-114cc214]{justify-content:space-between;align-items:center;display:flex}.tree[data-v-114cc214]{flex-direction:column;gap:4px;display:flex}.tree-row[data-v-114cc214]{background:var(--card-bg);border:1px solid var(--border-color);border-radius:10px;align-items:center;gap:8px;padding:10px 14px;transition:all .15s;display:flex}.tree-row[data-v-114cc214]:hover{border-color:var(--accent)}.tree-toggle[data-v-114cc214]{color:var(--text-secondary);cursor:pointer;text-align:center;flex-shrink:0;width:16px;font-size:10px}.tree-icon[data-v-114cc214]{cursor:pointer;font-size:18px}.tree-name[data-v-114cc214]{cursor:pointer;text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0;font-size:14px;font-weight:600;overflow:hidden}.tree-actions[data-v-114cc214]{flex-shrink:0;gap:4px;display:flex}.tree-children[data-v-114cc214]{flex-direction:column;gap:4px;margin-left:20px;display:flex}.tree-empty[data-v-114cc214]{color:var(--text-secondary);padding:10px 14px;font-size:13px}.tree-add-row[data-v-114cc214]{padding:4px 14px}.subject-row[data-v-114cc214]{background:var(--card-bg)}.chapter-row[data-v-114cc214]{background:var(--bg-secondary);border-color:#0000}.chapter-row[data-v-114cc214]:hover{border-color:var(--accent)}.tree-question[data-v-114cc214]{background:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;padding:10px 14px}.q-header[data-v-114cc214]{align-items:flex-start;gap:8px;display:flex}.q-text[data-v-114cc214]{color:var(--text-primary);flex:1;font-size:13px;line-height:1.5}.q-actions[data-v-114cc214]{flex-shrink:0;gap:4px;display:flex}@media (max-width:640px){.tree-children[data-v-114cc214]{margin-left:8px}.tree-name[data-v-114cc214]{font-size:13px}}.profile-card[data-v-af3a72dd]{max-width:500px}.error-msg[data-v-af3a72dd]{color:#ef4444;font-size:13px}.success-msg[data-v-af3a72dd]{color:#22c55e;font-size:13px}.quiz-progress[data-v-0b7da08a]{align-items:center;gap:14px;margin-bottom:20px;display:flex}.quiz-progress .el-progress[data-v-0b7da08a]{flex:1}.progress-info[data-v-0b7da08a]{color:var(--text-secondary);flex-shrink:0;font-size:14px;font-weight:700}.quiz-actions[data-v-0b7da08a]{justify-content:center;gap:12px;padding:16px 0;display:flex}.login-page[data-v-424a31b5]{justify-content:center;align-items:center;min-height:100vh;padding:20px;display:flex}.login-card[data-v-424a31b5]{background:var(--card-bg);border:1px solid var(--border-color);border-radius:16px;width:100%;max-width:400px;padding:40px 32px}.login-header[data-v-424a31b5]{text-align:center;margin-bottom:32px}.login-icon[data-v-424a31b5]{margin-bottom:12px;font-size:48px}.login-header h1[data-v-424a31b5]{color:var(--text-primary);font-size:28px;font-weight:800}.login-header p[data-v-424a31b5]{color:var(--text-secondary);margin-top:6px;font-size:14px}.login-form[data-v-424a31b5]{flex-direction:column;gap:4px;display:flex}.error-msg[data-v-424a31b5]{color:#ef4444;text-align:center;margin:-8px 0;font-size:13px}.switch-link[data-v-424a31b5]{text-align:center;color:var(--text-secondary);margin-top:4px;font-size:13px}.subject-header[data-v-eea7d876]{margin-bottom:24px}.subject-info[data-v-eea7d876]{align-items:center;gap:16px;margin:12px 0 16px;display:flex}.subject-icon[data-v-eea7d876]{background:var(--bg-secondary);border-radius:14px;flex-shrink:0;justify-content:center;align-items:center;width:56px;height:56px;font-size:36px;display:flex}.subject-desc[data-v-eea7d876]{color:var(--text-secondary);font-size:14px}.subject-actions[data-v-eea7d876]{gap:8px;display:flex}.chapter-list[data-v-eea7d876]{flex-direction:column;gap:10px;display:flex}.chapter-item[data-v-eea7d876]{cursor:pointer;transition:all .2s}.chapter-item:hover .ch-arrow[data-v-eea7d876]{color:var(--accent);transform:translate(3px)}.ch-body[data-v-eea7d876]{align-items:center;gap:14px;display:flex}.ch-icon[data-v-eea7d876]{font-size:24px}.ch-content[data-v-eea7d876]{flex:1;min-width:0}.ch-content h3[data-v-eea7d876]{font-size:15px;font-weight:600}.ch-content p[data-v-eea7d876]{color:var(--text-secondary);font-size:13px}.ch-arrow[data-v-eea7d876]{color:var(--text-secondary);transition:transform .2s}.mode-list[data-v-eea7d876]{flex-direction:column;gap:10px;display:flex}.mode-card[data-v-eea7d876]{background:var(--card-bg);border:1.5px solid var(--border-color);cursor:pointer;border-radius:12px;align-items:center;gap:14px;padding:16px 18px;transition:all .2s;display:flex}.mode-card[data-v-eea7d876]:hover{border-color:var(--accent)}.mode-card-expand[data-v-eea7d876]{cursor:default;flex-direction:column;align-items:stretch}.mode-card-expand[data-v-eea7d876]:hover{border-color:var(--border-color)}.mode-card-header[data-v-eea7d876]{cursor:pointer;align-items:center;gap:14px;display:flex}.mode-card-header:hover .mode-arrow[data-v-eea7d876]{color:var(--accent);transform:translate(3px)}.mode-icon[data-v-eea7d876]{background:var(--bg-secondary);border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;width:48px;height:48px;font-size:28px;display:flex}.mode-content[data-v-eea7d876]{flex:1}.mode-title[data-v-eea7d876]{margin-bottom:2px;font-size:15px;font-weight:700}.mode-desc[data-v-eea7d876]{color:var(--text-secondary);font-size:13px}.mode-arrow[data-v-eea7d876]{color:var(--text-secondary);flex-shrink:0;font-size:16px;transition:transform .2s}.chapter-picker[data-v-eea7d876]{border-top:1px solid var(--border-color);flex-direction:column;gap:6px;margin-top:10px;padding-top:10px;display:flex}.chapter-pick-item[data-v-eea7d876]{background:var(--bg-secondary);cursor:pointer;border-radius:10px;align-items:center;gap:10px;padding:10px 14px;transition:all .15s;display:flex}.chapter-pick-item[data-v-eea7d876]:hover{background:var(--accent-light)}.chapter-pick-icon[data-v-eea7d876]{font-size:18px}.chapter-pick-name[data-v-eea7d876]{flex:1;font-size:14px;font-weight:600}.chapter-pick-go[data-v-eea7d876]{color:var(--accent);opacity:0;font-size:12px;font-weight:600;transition:opacity .15s}.chapter-pick-item:hover .chapter-pick-go[data-v-eea7d876]{opacity:1}.chapter-picker-empty[data-v-eea7d876]{color:var(--text-secondary);text-align:center;padding:12px;font-size:13px}@media (max-width:640px){.subject-info[data-v-eea7d876]{flex-direction:column;align-items:flex-start}.subject-actions[data-v-eea7d876]{flex-wrap:wrap}}