*{box-sizing:border-box}html,body{color:#17201a;-webkit-font-smoothing:antialiased;overscroll-behavior:none;background:#f5f7f6;height:100%;margin:0;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei,sans-serif}button,textarea{font:inherit}button{-webkit-tap-highlight-color:transparent}#app{background:#f5f7f6;justify-content:center;height:100%;display:flex;overflow:hidden}.chat-shell{background:#f7f8f7;grid-template-rows:minmax(0,1fr) auto;width:100%;max-width:720px;height:100dvh;display:grid;overflow:hidden}.message-list{-webkit-overflow-scrolling:touch;min-height:0;padding:18px 14px 16px;overflow-y:auto}.state-message{color:#66736b;text-align:center;background:#0f172a0f;border-radius:8px;width:fit-content;max-width:86%;margin:22px auto;padding:8px 12px;font-size:13px;line-height:18px}.state-message--error{color:#b42318;background:#fff0ee}.message-row{margin-bottom:12px;display:flex}.message-row--user{justify-content:flex-end}.message-row--assistant{justify-content:flex-start}.message-bubble{border-radius:12px;max-width:min(78%,520px);padding:10px 12px 7px;box-shadow:0 6px 16px #0f172a0f}.message-row--user .message-bubble{color:#fff;background:#00b050;border-bottom-right-radius:4px}.message-row--assistant .message-bubble{color:#1f2a24;background:#fff;border:1px solid #e5ebe7;border-bottom-left-radius:4px}.message-bubble--loading{justify-content:center;align-items:center;min-width:52px;min-height:36px;padding:11px 13px;display:flex}.reply-dots{align-items:center;gap:4px;height:10px;display:inline-flex}.reply-dots span{background:#8c9891;border-radius:50%;width:5px;height:5px;animation:1.1s ease-in-out infinite reply-dot}.reply-dots span:nth-child(2){animation-delay:.16s}.reply-dots span:nth-child(3){animation-delay:.32s}.message-text{white-space:pre-wrap;word-break:break-word;font-size:15px;line-height:22px}.message-meta{justify-content:flex-end;align-items:center;gap:8px;margin-top:4px;display:flex}.copy-button{color:#00a14a;background:0 0;border:0;padding:0;font-size:12px;line-height:16px}.message-time{color:#9aa6a0;font-size:11px;line-height:14px}.message-row--user .message-time{color:#ffffffb8}.input-bar{padding:10px 14px calc(40px + env(safe-area-inset-bottom));background:#fffffffa;border-top:1px solid #e5ebe7;grid-template-columns:minmax(0,1fr) 56px 80px;align-items:end;gap:6px;display:grid}.input-bar--wechat{grid-template-columns:minmax(0,1fr) 80px}.message-input{resize:none;color:#1f2a24;background:#fff;border:1px solid #d8e3dd;border-radius:8px;outline:none;width:100%;height:42px;max-height:96px;padding:10px 12px;font-size:15px;line-height:20px}.message-input:focus{border-color:#00b050;box-shadow:0 0 0 1px #00b050}.message-input::placeholder{color:#a1aaa5}.action-button{border:1px solid #0000;border-radius:8px;height:42px;font-size:15px;font-weight:600}.paste-button{color:#00a14a;background:#f6fbf8;border-color:#cfe8da;width:56px;padding:0}.send-button{color:#fff;background:#00b050;border-color:#00b050;justify-self:start;width:72px}.action-button:disabled{opacity:.55}.toast{left:50%;bottom:calc(96px + env(safe-area-inset-bottom));z-index:10;color:#fff;background:#0f172ac7;border-radius:8px;max-width:80vw;padding:8px 12px;font-size:13px;line-height:18px;position:fixed;transform:translate(-50%)}@media (width>=769px){#app{padding:24px 0}.chat-shell{border-radius:8px;height:calc(100dvh - 48px);box-shadow:0 18px 60px #0f172a14}}@media (width<=768px){.message-bubble{max-width:82%}}@media (prefers-reduced-motion:reduce){.reply-dots span{animation:none}}@keyframes reply-dot{0%,80%,to{opacity:.35;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}