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#dee2e6}.btn-back[data-v-bc3d0848]{background:none;border:none;font-size:20px;cursor:pointer;margin-right:15px;padding:5px 10px;color:#6c757d;transition:color .3s}.btn-back[data-v-bc3d0848]:hover{color:#007bff}.page-header h2[data-v-bc3d0848]{margin:0;color:#495057;font-size:24px;font-weight:500}.form-container[data-v-bc3d0848]{background-color:#fff;padding:30px;border-radius:8px;box-shadow:0 2px 4px #0000001a}.class-form[data-v-bc3d0848]{width:100%}.form-group[data-v-bc3d0848]{margin-bottom:25px}.form-group label[data-v-bc3d0848]{display:block;margin-bottom:8px;font-weight:500;color:#495057;font-size:14px}.form-group input[type=text][data-v-bc3d0848],.form-group select[data-v-bc3d0848]{width:100%;padding:10px 12px;border:1px solid #ced4da;border-radius:4px;font-size:14px;transition:border-color .3s}.form-group input[type=text][data-v-bc3d0848]:focus,.form-group select[data-v-bc3d0848]:focus{outline:none;border-color:#007bff;box-shadow:0 0 0 2px #007bff40}.form-group input[type=text][data-v-bc3d0848]::placeholder{color:#6c757d}.inline-form-group[data-v-bc3d0848]{display:flex;align-items:center;margin-bottom:15px}.inline-form-group label[data-v-bc3d0848]{display:inline-block;margin-bottom:0;margin-right:15px;width:100px;text-align:right}.inline-form-group input[type=text][data-v-bc3d0848],.inline-form-group select[data-v-bc3d0848]{flex:1;width:auto;max-width:400px}.video-upload-container[data-v-bc3d0848]{border:1px dashed #ced4da;border-radius:4px;padding:20px;text-align:center;background-color:#f8f9fa}.video-upload-container input[type=file][data-v-bc3d0848]{margin-bottom:15px}.video-preview[data-v-bc3d0848]{margin-top:15px;text-align:center}.video-preview video[data-v-bc3d0848]{max-width:100%;border-radius:4px;box-shadow:0 2px 4px #0000001a}.editor-container[data-v-bc3d0848]{border:1px solid #ced4da;border-radius:4px;overflow:hidden;max-width:800px}.form-actions[data-v-bc3d0848]{display:flex;justify-content:flex-end;margin-top:40px;padding-top:20px;border-top:1px solid #dee2e6}.btn-cancel[data-v-bc3d0848],.btn-submit[data-v-bc3d0848]{padding:10px 20px;border:none;border-radius:4px;font-size:14px;cursor:pointer;transition:all .3s}.btn-cancel[data-v-bc3d0848]{background-color:#6c757d;color:#fff;margin-right:10px}.btn-cancel[data-v-bc3d0848]:hover{background-color:#5a6268}.btn-submit[data-v-bc3d0848]{background-color:#007bff;color:#fff}.btn-submit[data-v-bc3d0848]:hover{background-color:#0056b3}.btn-submit[data-v-bc3d0848]:disabled{background-color:#6c757d;cursor:not-allowed}.chapter-class-container[data-v-42f53643]{padding:20px 20px 5px;max-width:1200px;margin:0 auto}.page-header[data-v-42f53643]{display:flex;align-items:center;gap:16px;margin-bottom:10px;padding-bottom:15px;border-bottom:1px solid #e9ecef}.btn-back[data-v-42f53643]{padding:8px 16px;background-color:#6c757d;color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:14px;transition:background-color .3s}.btn-back[data-v-42f53643]:hover{background-color:#5a6268}.page-header h2[data-v-42f53643]{margin:0;font-size:20px;color:#333}.chapter-header[data-v-42f53643]{display:flex;justify-content:space-between;align-items:center;padding:6px 16px;cursor:pointer;background-color:#f1f3f4;transition:background-color .2s;margin-top:5px;border:1px solid #ccc;border-radius:4px 4px 0 0/4px 4px 0px 0px}.chapter-header h4[data-v-42f53643]{margin:0;font-size:14px;color:#495057;flex:1}.chapter-toggle[data-v-42f53643]{font-size:12px;color:#6c757d;margin-left:8px;min-width:20px;text-align:right}.lesson-list[data-v-42f53643]{padding:12px 16px;cursor:pointer;background-color:#fff;transition:background-color .2s;margin-bottom:5px;border:1px solid #ccc;border-top:none;border-radius:0 0 4px 4px/0px 0px 4px 4px}.lesson-info[data-v-42f53643]{display:flex;align-items:center;gap:8px;padding:8px 0}.lesson-title[data-v-42f53643]{flex:1;font-size:14px;color:#495057}.lesson-duration[data-v-42f53643]{font-size:12px;color:#6c757d;margin-right:16px}.btn-edit-lesson[data-v-42f53643]{padding:4px 12px;background-color:#007bff;color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:12px;transition:background-color .3s}.btn-edit-lesson[data-v-42f53643]:hover{background-color:#0056b3}.coupon-management[data-v-2105a4e1]{background-color:#fff;border-radius:8px;padding:24px;box-shadow:0 2px 4px #0000000d}.search-filter[data-v-2105a4e1]{display:flex;gap:16px;margin-bottom:24px;align-items:center}.search-input[data-v-2105a4e1]{padding:8px 12px;border:1px solid #ddd;border-radius:4px;font-size:14px;width:200px}.date-input[data-v-2105a4e1]{padding:8px 12px;border:1px solid #ddd;border-radius:4px;font-size:14px}.search-sep[data-v-2105a4e1]{flex:1}.btn-add[data-v-2105a4e1]{background-color:#3498db;color:#fff;border:none;padding:8px 16px;border-radius:4px;cursor:pointer;transition:background-color .3s}.btn-add[data-v-2105a4e1]:hover{background-color:#2980b9}.coupons-table-container[data-v-2105a4e1]{margin-bottom:24px;overflow-x:auto}.coupons-table[data-v-2105a4e1]{width:100%;border-collapse:collapse}.coupons-table th[data-v-2105a4e1],.coupons-table td[data-v-2105a4e1]{padding:8px;text-align:left;border-bottom:1px solid #eee}.coupons-table th[data-v-2105a4e1]{font-weight:600;color:#495057;background-color:#f8f9fa}.status[data-v-2105a4e1]{padding:4px 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.3s}.btn-edit[data-v-2105a4e1]{background-color:#28a745;color:#fff}.btn-edit[data-v-2105a4e1]:hover{background-color:#218838}.btn-delete[data-v-2105a4e1]{background-color:#dc3545;color:#fff}.btn-delete[data-v-2105a4e1]:hover{background-color:#c82333}.btn-enable[data-v-2105a4e1]{background-color:#17a2b8;color:#fff}.btn-enable[data-v-2105a4e1]:hover{background-color:#138496}.btn-disable[data-v-2105a4e1]{background-color:#6c757d;color:#fff}.btn-disable[data-v-2105a4e1]:hover{background-color:#5a6268}.pagination[data-v-2105a4e1]{display:flex;justify-content:center;align-items:center;gap:16px;color:#6c757d;font-size:14px}.btn-prev[data-v-2105a4e1],.btn-next[data-v-2105a4e1]{padding:6px 12px;border:1px solid #ddd;background-color:#fff;border-radius:4px;cursor:pointer;transition:all 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#1890ff;color:#fff}.btn-submit[data-v-27bff3b9]:hover{background-color:#40a9ff;border-color:#40a9ff}.btn-cancel[data-v-27bff3b9]:disabled,.btn-submit[data-v-27bff3b9]:disabled{opacity:.6;cursor:not-allowed}.error[data-v-27bff3b9]{border-color:#ff4d4f!important}.error-message[data-v-27bff3b9]{color:#ff4d4f;font-size:12px;margin-top:5px}.checking-message[data-v-27bff3b9]{color:#1890ff;font-size:12px;margin-top:5px;display:block}.required[data-v-27bff3b9]{color:#ff4d4f;font-weight:700}.loading-overlay[data-v-27bff3b9]{position:fixed;inset:0;background-color:#ffffffb3;display:flex;justify-content:center;align-items:center;z-index:9999}.message-management[data-v-d52f47f2]{background-color:#fff;border-radius:8px;padding:24px;box-shadow:0 2px 4px #0000000d}.search-filter[data-v-d52f47f2]{display:flex;gap:16px;margin-bottom:24px;align-items:center}.search-input[data-v-d52f47f2],.status-select[data-v-d52f47f2]{padding:8px 12px;border:1px solid #ddd;border-radius:4px;font-size:14px}.search-input[data-v-d52f47f2]{width:200px}.status-select[data-v-d52f47f2]{width:120px}.search-sep[data-v-d52f47f2]{flex:1}.messages-table-container[data-v-d52f47f2]{margin-bottom:24px;overflow-x:auto}.messages-table[data-v-d52f47f2]{width:100%;border-collapse:collapse}.messages-table th[data-v-d52f47f2],.messages-table td[data-v-d52f47f2]{padding:12px 8px;text-align:left;border-bottom:1px solid #eee}.messages-table th[data-v-d52f47f2]{font-weight:600;color:#495057;background-color:#f8f9fa}.message-content[data-v-d52f47f2]{max-width:200px;white-space:normal;word-wrap:break-word;word-break:break-word;overflow:visible;text-overflow:ellipsis}.dt-phone[data-v-d52f47f2]{font-size:14px;color:#999;width:120px}.dt-col[data-v-d52f47f2]{width:100px;font-size:12px;color:#666}.action-col[data-v-d52f47f2]{width:90px}.status[data-v-d52f47f2]{padding:4px 8px;border-radius:4px;font-size:12px;font-weight:500}.status.unread[data-v-d52f47f2]{background-color:#d4edda;color:#155724}.status.read[data-v-d52f47f2]{background-color:#fff3cd;color:#856404}.status.replied[data-v-d52f47f2]{background-color:#d1ecf1;color:#0c5460}.actions[data-v-d52f47f2]{display:flex;gap:8px}.btn-view[data-v-d52f47f2],.btn-reply[data-v-d52f47f2]{padding:4px 8px;border:none;border-radius:4px;cursor:pointer;font-size:12px;transition:background-color .3s}.btn-view[data-v-d52f47f2]{background-color:#17a2b8;color:#fff}.btn-view[data-v-d52f47f2]:hover{background-color:#138496}.btn-reply[data-v-d52f47f2]{background-color:#28a745;color:#fff}.btn-reply[data-v-d52f47f2]:hover{background-color:#218838}.pagination[data-v-d52f47f2]{display:flex;justify-content:center;align-items:center;gap:16px;color:#6c757d;font-size:14px}.btn-prev[data-v-d52f47f2],.btn-next[data-v-d52f47f2]{padding:6px 12px;border:1px solid #ddd;background-color:#fff;border-radius:4px;cursor:pointer;transition:all .3s}.btn-prev[data-v-d52f47f2]:hover:not(:disabled),.btn-next[data-v-d52f47f2]:hover:not(:disabled){border-color:#adb5bd}.btn-prev[data-v-d52f47f2]:disabled,.btn-next[data-v-d52f47f2]:disabled{cursor:not-allowed;opacity:.5}.modal-overlay[data-v-d52f47f2]{position:fixed;inset:0;background-color:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000}.modal[data-v-d52f47f2]{background-color:#fff;border-radius:8px;width:600px;max-width:90%;max-height:90vh;overflow-y:auto}.modal-header[data-v-d52f47f2]{padding:16px;border-bottom:1px solid #eee;display:flex;justify-content:space-between;align-items:center}.modal-header h3[data-v-d52f47f2]{margin:0;font-size:18px}.modal-close[data-v-d52f47f2]{background:none;border:none;font-size:20px;cursor:pointer;color:#666}.modal-body[data-v-d52f47f2]{padding:16px}.modal-footer[data-v-d52f47f2]{padding:16px;border-top:1px solid #eee;display:flex;justify-content:flex-end;gap:10px}.btn-cancel[data-v-d52f47f2],.btn-save[data-v-d52f47f2]{padding:8px 16px;border:none;border-radius:4px;cursor:pointer;font-size:14px}.btn-cancel[data-v-d52f47f2]{background-color:#6c757d;color:#fff}.btn-save[data-v-d52f47f2]{background-color:#28a745;color:#fff}.message-detail .message-info[data-v-d52f47f2]{margin-bottom:16px;padding-bottom:16px;border-bottom:1px solid #eee}.message-detail .message-info p[data-v-d52f47f2]{margin:8px 0}.message-detail .message-content[data-v-d52f47f2]{margin-bottom:16px}.message-detail .message-content h4[data-v-d52f47f2],.message-detail .reply-content h4[data-v-d52f47f2],.message-detail .reply-form h4[data-v-d52f47f2]{margin:0 0 8px;font-size:16px}.message-detail .content[data-v-d52f47f2]{padding:10px;background-color:#f8f9fa;border-radius:4px;line-height:1.5}.message-detail .reply-content[data-v-d52f47f2]{margin-bottom:16px;padding-top:16px;border-top:1px solid #eee}.message-detail .reply-time[data-v-d52f47f2]{margin-top:8px;text-align:right;font-size:12px;color:#6c757d}.reply-textarea[data-v-d52f47f2]{width:100%;padding:10px;border:1px solid #ddd;border-radius:4px;resize:vertical}.order-detail[data-v-c00a9d34]{background-color:#fff;border-radius:8px;padding:24px;box-shadow:0 2px 4px #0000000d}.page-header[data-v-c00a9d34]{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid #eee}.page-header h2[data-v-c00a9d34]{margin:0 0 0 10px;color:#2c3e50;font-size:18px}.header-content[data-v-c00a9d34]{display:flex;align-items:center}.btn-back[data-v-c00a9d34]{background-color:#6c757d;color:#fff;border:none;padding:8px 16px;border-radius:4px;cursor:pointer;transition:background-color .3s}.btn-back[data-v-c00a9d34]:hover{background-color:#5a6268}.loading-container[data-v-c00a9d34],.error-container[data-v-c00a9d34]{text-align:center;padding:60px 0;color:#6c757d}.info-section[data-v-c00a9d34]{margin-bottom:24px;padding:16px;background-color:#f8f9fa;border-radius:8px}.info-section h3[data-v-c00a9d34]{margin:0 0 16px;color:#2c3e50;font-size:16px;border-bottom:1px solid #dee2e6;padding-bottom:8px}.info-grid[data-v-c00a9d34]{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:12px}.info-item[data-v-c00a9d34]{display:flex;align-items:flex-start}.info-item.full-width[data-v-c00a9d34]{grid-column:1 / -1}.info-label[data-v-c00a9d34]{flex:0 0 80px;color:#6c757d;font-size:14px}.info-value[data-v-c00a9d34]{flex:1;color:#495057;font-size:14px}.info-value.amount[data-v-c00a9d34]{color:#28a745;font-weight:500}.info-value.total-amount[data-v-c00a9d34]{color:#dc3545;font-weight:600;font-size:16px}.status[data-v-c00a9d34]{padding:4px 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