:root{--bg: #0e1116;--bg-elevated: #1e2330;--bg-elevated-translucent: rgba(30, 35, 48, .72);--panel: #151a24;--text: #e8ecf2;--text-dim: #9aa3b2;--text-muted: #6b7280;--border: rgba(255, 255, 255, .08);--border-strong: rgba(255, 255, 255, .14);--accent: #6ea8fe;--accent-hover: #8db8ff;--accent-dim: rgba(110, 168, 254, .15);--warning: #f4a261;--danger: #ef6161;--success: #72b043;--edit-mark: #f4d06f;--edit-mark-bg: rgba(244, 208, 111, .08);--split-mark: #9d6bff;--llm-regen-mark: #58c7c7;--shadow: 0 8px 32px rgba(0, 0, 0, .35);--radius: 12px;--radius-sm: 8px;font-size:15px}*{box-sizing:border-box}html,body,#root{margin:0;padding:0;height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;line-height:1.65}button{cursor:pointer;border:1px solid var(--border);background:var(--bg-elevated);color:var(--text);padding:8px 16px;border-radius:var(--radius-sm);font-size:14px;transition:all .15s 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