:root{--brand: #6C4DFF;--brand-hover: #8566FF;--brand-active: #5A3DE6;--brand-dark: #1A202C;--brand-darker: #0F1419;--brand-soft: rgba(108, 77, 255, .1);--accent: #28B894;--accent-soft: rgba(40, 184, 148, .12);--bg: #F7FAFC;--bg-page: #F7FAFC;--bg-elev: #FFFFFF;--bg-soft: #F1F5F9;--bg-aside: #FFFFFF;--bg-aside-active: rgba(108, 77, 255, .08);--bg-chat: #F7FAFC;--bg-bubble-user: #6C4DFF;--bg-bubble-ai: #FFFFFF;--text: #1A202C;--text-2: #4A5568;--text-3: #94A3B8;--text-inverse: #FFFFFF;--line: #E2E8F0;--line-light: #F1F5F9;--ok: #28B894;--ok-soft: rgba(40, 184, 148, .12);--warn: #E37318;--warn-soft: #FFF1E9;--danger: #E53E3E;--danger-soft: #FFF0ED;--info: #64748B;--info-soft: #F1F5F9;--radius: 10px;--radius-sm: 8px;--radius-lg: 14px;--radius-xl: 18px;--shadow: 0 10px 30px rgba(26, 32, 44, .06);--shadow-sm: 0 2px 8px rgba(26, 32, 44, .04);--shadow-header: 0 1px 0 rgba(226, 232, 240, .9);--font: "PingFang SC", "Alimama FangYuanTi VF", "Noto Sans SC", "Microsoft YaHei", "Helvetica Neue", 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