.rte[data-v-45d812a7]{border:1px solid #dcdfe6;border-radius:8px;overflow:hidden;background:#fff}.rte-head[data-v-45d812a7]{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;background:#f7f8fa;border-bottom:1px solid #ebeef5}.rte-title[data-v-45d812a7]{font-size:13px;font-weight:600;color:#4e5969}.rte-help[data-v-45d812a7]{padding:12px 14px;font-size:12px;line-height:1.75;color:#606266;background:#fafbfc;border-bottom:1px solid #ebeef5}.rte-help__line[data-v-45d812a7]{margin:0 0 8px;display:flex;flex-wrap:wrap;align-items:center;gap:6px 8px}.rte-help__line[data-v-45d812a7]:last-of-type{margin-bottom:0}.rte-help__label[data-v-45d812a7]{font-weight:600;color:#4e5969}.rte-help__hint[data-v-45d812a7]{color:#909399;font-size:11px}.rte-help__note[data-v-45d812a7]{margin:10px 0 0;padding-top:8px;border-top:1px dashed #e4e7ed;color:#909399;line-height:1.7}.rte-help code[data-v-45d812a7]{background:#eef2f7;padding:2px 6px;border-radius:3px;font-size:11px}.rte-code[data-v-45d812a7] textarea{font-family:Consolas,Courier New,monospace;font-size:13px;line-height:1.7;border:none;border-radius:0;padding:14px 16px;min-height:160px}.rte-preview-label[data-v-45d812a7]{padding:10px 16px 0;font-size:12px;font-weight:500;color:#909399;letter-spacing:.02em}.rte-preview[data-v-45d812a7]{min-height:72px;max-height:200px;overflow-y:auto;padding:12px 16px 16px;margin:8px 12px 12px;font-size:14px;line-height:1.75;color:#303133;background:#f9fafb;border:1px solid #eef0f3;border-radius:6px}.rte-preview[data-v-45d812a7] .rte-empty{color:#c0c4cc}.rte-preview[data-v-45d812a7] strong{font-weight:700}.rte-preview[data-v-45d812a7] u{text-decoration:underline}.rte-preview[data-v-45d812a7] .lm-markup-hr{height:0;border:none;border-top:1px solid #dcdfe6;margin:.75em 0}.media-list[data-v-2ac78662]{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:8px}.media-item[data-v-2ac78662]{position:relative}.media-thumb[data-v-2ac78662]{width:88px;height:64px;-o-object-fit:cover;object-fit:cover;border-radius:6px;border:1px solid #ebeef5;display:block}.media-file[data-v-2ac78662]{display:flex;align-items:center;gap:6px;max-width:220px;padding:6px 10px;background:#f5f7fa;border-radius:6px;font-size:12px;color:#4e5969}.media-name[data-v-2ac78662]{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.media-del[data-v-2ac78662]{position:absolute;top:-6px;right:-6px;cursor:pointer;background:#f56c6c;color:#fff;border-radius:50%;font-size:12px;padding:2px}.media-actions[data-v-2ac78662]{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.media-url[data-v-2ac78662]{width:280px}.media-hint[data-v-2ac78662]{color:#e6a23c;font-size:12px;margin-top:6px;line-height:1.5}.media-upload-progress[data-v-2ac78662]{margin-top:10px;padding:10px 12px;background:#f5f9fa;border:1px solid #d9ecff;border-radius:8px;max-width:520px}.media-upload-progress__head[data-v-2ac78662]{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:8px;font-size:12px;color:#4e5969}.media-upload-progress__name[data-v-2ac78662]{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:500;color:#303133}.media-upload-progress__size[data-v-2ac78662]{flex-shrink:0;color:#909399}.media-upload-progress__hint[data-v-2ac78662]{margin:8px 0 0;font-size:12px;line-height:1.5;color:#606266}.vm-field[data-v-12b00786]{margin-top:12px;padding:12px 14px;background:#fff;border:1px dashed #d8dee6;border-radius:8px}.vm-caption[data-v-12b00786]{margin:0 0 8px;font-size:13px;font-weight:600;color:#303133}.vm-player[data-v-12b00786]{display:block;width:100%;max-height:280px;background:#000;border-radius:6px}.vm-toolbar[data-v-12b00786]{display:flex;align-items:center;gap:10px;margin:10px 0 8px}.vm-now[data-v-12b00786]{font-size:12px;color:#909399}.vm-list[data-v-12b00786]{display:flex;flex-direction:column;gap:6px;margin-bottom:10px}.vm-row[data-v-12b00786]{display:grid;grid-template-columns:88px minmax(0,1.2fr) minmax(0,1.4fr) 36px;gap:6px;align-items:center}.vm-del[data-v-12b00786]{color:#f56c6c;padding:0}.vm-empty[data-v-12b00786],.vm-err[data-v-12b00786],.vm-warn[data-v-12b00786]{font-size:12px;line-height:1.6;margin:6px 0 8px}.vm-empty[data-v-12b00786]{color:#909399}.vm-warn[data-v-12b00786]{color:#e6a23c}.vm-err[data-v-12b00786]{color:#f56c6c}.vm-label[data-v-12b00786]{display:block;margin:8px 0 6px;font-size:12px;color:#606266}.vm-paste-ops[data-v-12b00786]{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}.wmap[data-v-50083bfe]{width:100%;margin:8px 0 2px}.wmap__head[data-v-50083bfe]{text-align:center;margin:0 0 12px}.wmap__title[data-v-50083bfe]{display:inline-block;font-size:16px;font-weight:700;color:#156570;background:#e7f4f6;border:1px solid rgba(42,123,136,.38);border-radius:8px;padding:7px 16px;letter-spacing:.03em;line-height:1.35}.wmap__hint[data-v-50083bfe]{font-size:12px;color:#9aa3ad;margin:8px 0 0}.wmap__frame[data-v-50083bfe]{position:relative;width:100%;max-width:580px;margin:0 auto}.wmap__viewport[data-v-50083bfe]{position:relative;width:100%;padding-top:92%;overflow:visible;background:transparent;border:0;touch-action:none;cursor:grab}.wmap--preview .wmap__viewport[data-v-50083bfe]{cursor:default;max-width:440px;margin:0 auto}.wmap__stage[data-v-50083bfe]{position:absolute;left:11%;top:10%;width:78%;height:80%;transform-origin:center center}.wmap__axis--x[data-v-50083bfe]{position:absolute;top:50%;height:0;border-top:1px dashed rgba(42,123,136,.38);transform:translateY(-50%)}.wmap__axis--y[data-v-50083bfe]{position:absolute;left:50%;width:0;border-left:1px dashed rgba(42,123,136,.38);transform:translateX(-50%)}.wmap__lab[data-v-50083bfe]{position:absolute;font-size:11px;color:#9aa3ad;letter-spacing:.08em;white-space:nowrap;pointer-events:none}.wmap__lab--l[data-v-50083bfe]{left:0;top:50%;transform:translate(-112%,-50%)}.wmap__lab--r[data-v-50083bfe]{right:0;top:50%;transform:translate(112%,-50%)}.wmap__lab--b[data-v-50083bfe]{left:50%;bottom:0;transform:translate(-50%,128%)}.wmap__lab--t[data-v-50083bfe]{left:50%;top:0;transform:translate(-50%,-128%)}.wmap__word[data-v-50083bfe]{position:absolute;transform:translate(-50%,-50%);border:0;background:transparent;box-shadow:none;outline:none;-moz-appearance:none;appearance:none;-webkit-appearance:none;font-family:inherit;padding:5px 3px;font-size:13px;font-weight:500;color:#2c3540;line-height:1.25;cursor:default;white-space:nowrap;z-index:2}.wmap__word--center[data-v-50083bfe]{color:#e14b4b;font-weight:800;font-size:17px;letter-spacing:.12em;text-transform:uppercase;z-index:3}.wmap__word[data-v-50083bfe]:focus{outline:none;box-shadow:none}.wmap__word--on[data-v-50083bfe]{color:#2a7b88;z-index:20}.wmap__bubble[data-v-50083bfe]{position:absolute;z-index:60;min-width:220px;max-width:400px;padding:12px 14px 13px;background:#fff;border:1px solid rgba(42,123,136,.16);border-radius:10px;box-shadow:0 10px 28px rgba(28,39,49,.16);text-align:left;white-space:normal;pointer-events:none;line-height:1.45}.wmap__bubble--above[data-v-50083bfe]{transform:translate(-50%,calc(-100% - 10px))}.wmap__bubble--below[data-v-50083bfe]{transform:translate(-50%,14px)}.wmap__bubble--right[data-v-50083bfe]{transform:translate(14px,-50%)}.wmap__bubble--left[data-v-50083bfe]{transform:translate(calc(-100% - 14px),-50%)}.wmap__b1[data-v-50083bfe]{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px}.wmap__b1-en[data-v-50083bfe]{font-weight:700;font-size:14px;color:#1f2a33;letter-spacing:.02em}.wmap__b1-zh[data-v-50083bfe]{font-size:13px;font-weight:500;color:#2a7b88}.wmap__b2[data-v-50083bfe]{margin-top:6px;font-size:11px;color:#8a97a5;letter-spacing:.04em;line-height:1.4}.wmap__b3[data-v-50083bfe]{margin-top:8px;padding-top:8px;border-top:1px solid rgba(42,123,136,.12)}.wmap__b3-item[data-v-50083bfe]{display:flex;align-items:flex-start;gap:8px;margin-top:6px;padding:8px 10px;background:#f5f9fa;border-radius:8px}.wmap__b3-item[data-v-50083bfe]:first-child{margin-top:0}.wmap__b3-idx[data-v-50083bfe]{flex:0 0 auto;width:16px;height:16px;margin-top:2px;border-radius:50%;background:rgba(42,123,136,.16);color:#156570;font-size:10px;font-weight:700;line-height:16px;text-align:center}.wmap__b3-body[data-v-50083bfe]{flex:1;min-width:0}.wmap__b3-en[data-v-50083bfe]{display:block;font-size:12.5px;font-style:italic;color:#2c3540;line-height:1.5}.wmap__b3-zh[data-v-50083bfe]{display:block;margin-top:4px;font-size:12px;color:#7a8794;line-height:1.5}.wmap__zoom[data-v-50083bfe]{position:absolute;right:0;bottom:4px;display:flex;gap:6px;z-index:4}.wmap__zoom-btn[data-v-50083bfe]{width:26px;height:26px;border:0;background:transparent;color:#8a97a5;cursor:pointer;font-size:16px;line-height:1;opacity:.7}.wmap__zoom-btn[data-v-50083bfe]:hover{color:#2a7b88;opacity:1}.wm-field[data-v-704c8a44]{margin-top:4px}.wm-caption[data-v-704c8a44]{font-size:13px;color:#606266;margin:0 0 8px}.wm-err[data-v-704c8a44]{color:#f56c6c;font-size:12px;margin:6px 0}.wm-ok[data-v-704c8a44]{color:#67c23a;font-size:12px;margin:6px 0}.bo[data-v-58e67c59]{border:1px solid #ebeef5;border-radius:6px;overflow:hidden;max-width:360px}.bo-row[data-v-58e67c59]{display:flex;align-items:center;gap:10px;padding:8px 12px;border-bottom:1px solid #f5f7fa;background:#fff}.bo-row[data-v-58e67c59]:last-child{border-bottom:none}.bo-handle[data-v-58e67c59]{cursor:move;color:#909399}.bo-idx[data-v-58e67c59]{width:18px;color:#909399}.bo-label[data-v-58e67c59]{flex:1}.course-content-page[data-v-600e64d2]{min-width:0}.page-header[data-v-600e64d2]{display:flex;align-items:flex-start;gap:16px;margin-bottom:20px}.page-header-text[data-v-600e64d2]{flex:1;min-width:0}.page-header-text .page-title[data-v-600e64d2]{margin:0 0 6px}.page-header-text .page-subtitle[data-v-600e64d2]{margin:0;line-height:1.6}.content-columns[data-v-600e64d2]{align-items:stretch}.cards-panel[data-v-600e64d2],.chapter-panel[data-v-600e64d2]{height:100%;min-height:520px;display:flex;flex-direction:column}.panel-head[data-v-600e64d2]{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid #eef0f3;flex-shrink:0}.panel-title[data-v-600e64d2]{font-weight:600;font-size:15px;color:#1f2329;min-width:0}.chapter-name[data-v-600e64d2]{font-weight:400;color:#8a9099;margin-left:4px}.panel-actions[data-v-600e64d2]{display:flex;align-items:center;gap:8px;flex-shrink:0;flex-wrap:wrap;justify-content:flex-end}.batch-import-hint[data-v-600e64d2]{margin:0 0 10px;font-size:13px;line-height:1.65;color:#5c6b7a;white-space:pre-line}.batch-import-target[data-v-600e64d2]{margin:0 0 10px;font-size:13px;color:#303133}.batch-import-errors[data-v-600e64d2]{margin-top:10px;padding:8px 10px;background:#fef0f0;border-radius:6px;color:#f56c6c;font-size:13px}.batch-import-errors p[data-v-600e64d2]{margin:0 0 4px}.batch-import-errors p[data-v-600e64d2]:last-child{margin-bottom:0}.batch-import-preview[data-v-600e64d2]{margin-top:12px;border:1px solid #ebeef5;border-radius:8px;overflow:hidden}.batch-import-preview__head[data-v-600e64d2]{padding:8px 12px;background:#f5f7fa;font-size:13px;color:#303133}.batch-import-preview__list[data-v-600e64d2]{max-height:240px;overflow:auto}.batch-import-preview__item[data-v-600e64d2]{display:flex;align-items:center;gap:10px;padding:8px 12px;border-top:1px solid #f0f2f5;font-size:12px}.bp-idx[data-v-600e64d2]{flex-shrink:0;width:22px;height:22px;border-radius:50%;background:#ecf5ff;color:#409eff;display:inline-flex;align-items:center;justify-content:center;font-weight:600}.bp-meta[data-v-600e64d2]{flex-shrink:0;display:inline-flex;gap:4px}.bp-preview[data-v-600e64d2]{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#606266}.panel-head-actions[data-v-600e64d2]{display:flex;align-items:center;gap:10px;flex-shrink:0}.expand-btns[data-v-600e64d2] .el-button{padding:7px 12px}.tree-wrap[data-v-600e64d2] .el-tree-node__content.is-drop-inner{background:transparent}.tree-wrap[data-v-600e64d2]{flex:1;min-height:0;overflow:auto;padding-right:4px}.tree-wrap[data-v-600e64d2] .el-tree-node__content{height:auto;min-height:38px;padding:4px 0;border-radius:6px}.tree-wrap[data-v-600e64d2] .el-tree-node.is-current>.el-tree-node__content{background:#ecf5ff}.tree-node[data-v-600e64d2]{display:flex;align-items:center;justify-content:space-between;width:100%;min-width:0;gap:10px;padding-right:4px}.tree-label[data-v-600e64d2]{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;line-height:1.5}.tree-label.lv1[data-v-600e64d2]{font-weight:600;font-size:14px}.tree-label.lv2[data-v-600e64d2]{color:#4e5969}.tree-label.lv3[data-v-600e64d2]{color:#409eff;font-weight:500}.tree-side[data-v-600e64d2]{display:flex;align-items:center;gap:6px;flex-shrink:0}.status-tag[data-v-600e64d2]{cursor:pointer;flex-shrink:0}.tree-ops[data-v-600e64d2]{opacity:0;transition:opacity .15s;white-space:nowrap}.tree-node:hover .tree-ops[data-v-600e64d2]{opacity:1}.card-list[data-v-600e64d2]{flex:1;min-height:0;overflow:auto;padding-right:2px}.card-item[data-v-600e64d2]{display:grid;grid-template-columns:28px 92px minmax(0,1fr) minmax(128px,156px) 56px;gap:12px 14px;align-items:start;padding:16px 14px;margin-bottom:12px;background:#fafbfc;border:1px solid #eef0f3;border-radius:10px;transition:border-color .15s ease,box-shadow .15s ease}.card-item[data-v-600e64d2]:last-child{margin-bottom:0}.card-item[data-v-600e64d2]:hover{border-color:#d9ecff;box-shadow:0 2px 10px rgba(64,158,255,.08)}.card-drag[data-v-600e64d2]{align-self:center;font-size:16px;padding-top:2px}.card-seq[data-v-600e64d2]{display:flex;flex-direction:column;gap:6px;min-width:0}.seq-label[data-v-600e64d2]{font-size:11px;color:#909399;line-height:1}.card-seq[data-v-600e64d2] .el-input-number{width:100%}.card-seq[data-v-600e64d2] .el-input-number .el-input__inner{padding-left:8px;padding-right:36px}.card-body[data-v-600e64d2]{min-width:0;overflow:hidden}.card-front[data-v-600e64d2]{font-size:14px;line-height:1.65;color:#303133;word-break:break-word;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.card-front[data-v-600e64d2] strong{font-weight:700}.card-front[data-v-600e64d2] u{text-decoration:underline}.card-front[data-v-600e64d2] s{text-decoration:line-through}.card-front[data-v-600e64d2] span{display:inline}.card-meta[data-v-600e64d2]{margin-top:12px;display:flex;flex-wrap:wrap;align-items:center;gap:8px}.card-id[data-v-600e64d2]{font-size:12px;color:#909399;padding-left:2px}.card-times[data-v-600e64d2]{margin-top:8px;font-size:12px;color:#909399;line-height:1.5;display:flex;flex-wrap:wrap;align-items:center;gap:6px}.time-sep[data-v-600e64d2]{color:#dcdfe6}.card-ops[data-v-600e64d2]{align-items:flex-end;flex-shrink:0;padding-top:2px}.card-drop[data-v-600e64d2],.card-ops[data-v-600e64d2]{display:flex;flex-direction:column;justify-content:center;gap:2px}.card-drop[data-v-600e64d2]{min-height:78px;border:1.5px dashed #dcdfe6;border-radius:8px;background:#fff;align-items:center;padding:8px 6px;cursor:pointer;color:#909399;text-align:center;-webkit-user-select:none;-moz-user-select:none;user-select:none;transition:border-color .15s ease,background .15s ease,color .15s ease}.card-drop i[data-v-600e64d2]{font-size:18px;color:#409eff}.card-drop-title[data-v-600e64d2]{font-size:12px;line-height:1.3;color:#606266}.card-drop-sub[data-v-600e64d2]{font-size:11px;color:#c0c4cc}.card-drop.is-over[data-v-600e64d2]{border-color:#409eff;background:#ecf5ff;color:#409eff}.card-drop.is-busy[data-v-600e64d2]{border-style:solid}.card-drop-jobs[data-v-600e64d2]{width:100%;margin-top:4px}.card-drop-job+.card-drop-job[data-v-600e64d2]{margin-top:4px}.hidden-file[data-v-600e64d2]{display:none}.card-ops[data-v-600e64d2] .el-button{padding:4px 0;margin:0}.card-ops[data-v-600e64d2] .el-button+.el-button{margin-left:0}.btn-danger[data-v-600e64d2]{color:#f56c6c!important}.drag-handle[data-v-600e64d2]{cursor:move;color:#909399}.drag-handle[data-v-600e64d2]:hover{color:#409eff}.empty[data-v-600e64d2]{text-align:center;color:#c0c4cc;padding:48px 16px;line-height:1.7}.form-hint[data-v-600e64d2]{color:#8a9099;font-size:12px;line-height:1.6;margin:8px 0 0}.card-edit-body[data-v-600e64d2]{display:flex;flex-direction:column;gap:20px}.edit-section[data-v-600e64d2]{padding:18px 20px;background:#fafbfc;border:1px solid #eef0f3;border-radius:10px}.edit-section--back[data-v-600e64d2]{background:#f5f8ff;border-color:#dce8ff}.edit-section-title[data-v-600e64d2]{margin:0 0 16px;padding-bottom:10px;border-bottom:1px solid #e8eaed;font-size:14px;font-weight:600;color:#1f2329}.edit-grid[data-v-600e64d2]{display:grid;gap:16px 24px}.edit-grid--meta[data-v-600e64d2]{grid-template-columns:repeat(2,minmax(0,1fr))}.edit-grid--media[data-v-600e64d2]{grid-template-columns:repeat(3,minmax(0,1fr));margin-top:4px}.field-group[data-v-600e64d2]{min-width:0}.edit-section .field-group+.field-group[data-v-600e64d2]{margin-top:18px}.field-group--full[data-v-600e64d2]{grid-column:1/-1}.field-group--editor[data-v-600e64d2]{margin-bottom:4px}.field-label[data-v-600e64d2]{display:block;margin-bottom:8px;font-size:13px;font-weight:500;color:#4e5969;line-height:1.4}@media (max-width:992px){.cards-panel[data-v-600e64d2],.chapter-panel[data-v-600e64d2]{min-height:auto;margin-bottom:16px}.card-item[data-v-600e64d2]{grid-template-columns:24px 80px minmax(0,1fr);grid-template-areas:"drag seq body" "drag seq ops"}.card-drag[data-v-600e64d2]{grid-area:drag}.card-seq[data-v-600e64d2]{grid-area:seq}.card-body[data-v-600e64d2]{grid-area:body}.card-ops[data-v-600e64d2]{grid-area:ops;flex-direction:row;justify-content:flex-start;align-items:center;gap:12px;padding-top:0}.edit-grid--media[data-v-600e64d2],.edit-grid--meta[data-v-600e64d2]{grid-template-columns:1fr}}.card-edit-dialog .el-dialog__header{padding:18px 24px 14px;border-bottom:1px solid #eef0f3}.card-edit-dialog .el-dialog__title{font-size:16px;font-weight:600;color:#1f2329}.card-edit-dialog .el-dialog__body{padding:20px 24px 8px;max-height:calc(92vh - 140px);overflow-y:auto}.card-edit-dialog .el-dialog__footer{padding:14px 24px 18px;border-top:1px solid #eef0f3}.card-edit-dialog .card-edit-footer{display:flex;justify-content:flex-end;gap:10px}