:root{--bg-app:#dde4ed;--bg-panel:#fff;--bg-elevated:#fff;--bg-muted:#f0f4f8;--bg-hover:#e6ecf3;--bg-chat:#e8eef4;--bg-bubble-me:#1a6fd4;--bg-bubble-other:#fff;--border:#d5dde7;--border-strong:#b8c3d1;--text:#12171e;--text-secondary:#445164;--text-tertiary:#5f6e82;--text-inverse:#fff;--accent:#1a6fd4;--accent-hover:#1459b0;--accent-soft:#e4effc;--accent-glow:#1a6fd429;--rail:#151b24;--rail-text:#ffffff9e;--rail-active:#1a6fd447;--success:#16a34a;--danger:#dc2626;--danger-soft:#fef2f2;--shadow:0 10px 32px #12171e14;--shadow-soft:0 1px 3px #12171e0f;--radius-sm:6px;--radius:10px;--radius-lg:14px;--font-display:"Outfit", "Source Sans 3", "PingFang SC", sans-serif;--font-body:"Source Sans 3", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--fs-xs:12px;--fs-sm:13px;--fs-md:15px;--fs-lg:16px;--fs-xl:17px;--fs-2xl:20px;--fs-3xl:24px;--lh-tight:1.3;--lh-normal:1.5;--lh-relaxed:1.65;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-7:32px}*,:before,:after{box-sizing:border-box}html,body,#app{height:100%;font-family:var(--font-body);font-size:var(--fs-md);line-height:var(--lh-normal);color:var(--text);background:radial-gradient(ellipse 90% 60% at 12% -10%, #1a6fd41a, transparent 55%), radial-gradient(ellipse 70% 50% at 100% 0%, #151b240d, transparent 50%), var(--bg-app);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;margin:0}button,input,textarea,select{font:inherit;color:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed}a{color:inherit;text-decoration:none}input::placeholder,textarea::placeholder{color:var(--text-tertiary);opacity:.85}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}::-webkit-scrollbar{width:7px;height:7px}::-webkit-scrollbar-thumb{background:#a8b4c4;border-radius:999px}::-webkit-scrollbar-thumb:hover{background:#8896a8}::-webkit-scrollbar-track{background:0 0}