:root{--bg: #f8f8f6;--bg-sidebar: #efefe9;--bg-bubble-ai: #ffffff;--bg-user: #1c1c1c;--border: #e4e4dd;--border-light: #ededea;--text: #1c1c1c;--text-sub: #909088;--text-user: #ffffff;--accent: #1c1c1c;--danger: #c0392b;--input-bg: #ffffff;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--radius: 13px;--sidebar-w: 232px;--transition: .22s cubic-bezier(.4, 0, .2, 1);--font-sans: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", system-ui, sans-serif}[data-theme=dark]{--bg: #18181a;--bg-sidebar: #1f1f21;--bg-bubble-ai: #242426;--bg-user: #d4d4ce;--border: #2e2e32;--border-light: #28282c;--text: #d4d4ce;--text-sub: #5a5a60;--text-user: #18181a;--accent: #c8c8c2;--input-bg: #242426}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background:var(--bg);color:var(--text)}