:root{color-scheme:light dark;--bg: #f2f2f7;--chat-bg: #ffffff;--card: #ffffff;--text: #1c1c1e;--muted: #8e8e93;--primary: #007aff;--border: #e5e5ea;--user-bubble: #007aff;--agent-bubble: #e9e9eb;--agent-bubble-text: #1c1c1e;--danger: #ff3b30;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,sans-serif}@media(prefers-color-scheme:dark){:root{--bg: #000000;--chat-bg: #000000;--card: #1c1c1e;--text: #f2f2f7;--muted: #8e8e93;--border: #38383a;--agent-bubble: #26262a;--agent-bubble-text: #f2f2f7}}*{box-sizing:border-box}html,body,#app{height:100%;margin:0}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}.app{max-width:720px;margin:0 auto;height:100%;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;gap:8px;padding:12px 16px;background:var(--card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:2}.topbar h1{font-size:17px;font-weight:600;margin:0;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.btn{border:none;background:var(--primary);color:#fff;border-radius:18px;padding:7px 16px;font-size:14px;font-weight:500;cursor:pointer}.btn:disabled{opacity:.45}.btn.ghost{background:transparent;color:var(--primary);padding:7px 4px}.btn.danger-text{color:var(--danger)}.hint{padding:10px 16px 4px;font-size:12px;color:var(--muted);text-align:center}.tabs{display:flex;gap:8px;padding:8px 16px}.tabs button{border:1px solid var(--border);background:var(--card);color:var(--text);border-radius:999px;padding:6px 14px;font-size:13px;cursor:pointer}.tabs button.active{background:var(--primary);color:#fff;border-color:var(--primary)}.list{flex:1;overflow:auto;padding:4px 16px 24px}.card{background:var(--card);border-radius:14px;padding:14px;margin-bottom:10px;cursor:pointer;box-shadow:0 1px 2px #0000000a}.card:active{opacity:.7}.card .row{display:flex;justify-content:space-between;gap:8px;align-items:center}.card strong{font-size:15px}.meta-right{display:inline-flex;align-items:center;gap:6px;flex-shrink:0}.badge{font-size:11px;padding:2px 8px;border-radius:999px;background:#007aff1f;color:var(--primary)}.badge.warn{background:#ff950026;color:#ff9500}.badge.muted{background:#8e8e9326;color:var(--muted)}.preview{color:var(--muted);font-size:13px;margin-top:6px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.preview.time-right{text-align:right;font-size:11px;margin-top:4px}.unread{width:8px;height:8px;border-radius:50%;background:var(--danger);display:inline-block}.empty,.error{padding:32px 16px;text-align:center;color:var(--muted)}.error{color:var(--danger);padding:10px 16px;font-size:13px}.chat{background:var(--chat-bg)}.messages{flex:1;overflow:auto;padding:16px 12px;display:flex;flex-direction:column}.msg-time{align-self:center;font-size:11px;color:var(--muted);margin:10px 0 8px}.sys-msg{align-self:center;font-size:12px;color:var(--muted);margin:4px 0 8px}.msg-row{display:flex;align-items:flex-end;gap:8px;margin-bottom:8px}.msg-row.user{justify-content:flex-end}.avatar{width:30px;height:30px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;color:#fff;background:linear-gradient(135deg,#4da3ff,#007aff)}.avatar svg{width:17px;height:17px}.bubble{max-width:72%;padding:9px 13px;border-radius:18px;font-size:15px;line-height:1.45;word-break:break-word}.bubble.user{background:var(--user-bubble);color:#fff;border-bottom-right-radius:4px}.bubble.agent{background:var(--agent-bubble);color:var(--agent-bubble-text);border-bottom-left-radius:4px}.bubble.img-only{background:transparent;padding:0;border-radius:16px;overflow:hidden}.bubble-text{white-space:pre-wrap}.bubble-text+.msg-img,.msg-img+.bubble-text{margin-top:6px}.msg-img{display:block;max-width:200px;max-height:260px;border-radius:14px;cursor:zoom-in;object-fit:cover}.bubble:not(.img-only) .msg-img{max-width:180px}.composer{border-top:1px solid var(--border);background:var(--card);padding:8px 12px calc(8px + env(safe-area-inset-bottom))}.composer-status{font-size:12px;color:var(--muted);text-align:center;padding-bottom:6px}.composer-row{display:flex;align-items:flex-end;gap:8px}.composer-icon{width:36px;height:36px;flex-shrink:0;border:none;border-radius:50%;background:transparent;color:var(--muted);display:flex;align-items:center;justify-content:center;cursor:pointer}.composer-icon svg{width:24px;height:24px}.composer-icon:disabled{opacity:.4}.composer textarea{flex:1;resize:none;min-height:36px;max-height:120px;border:1px solid var(--border);border-radius:18px;padding:8px 12px;font:inherit;font-size:15px;line-height:1.35;background:var(--bg);color:var(--text);outline:none}.composer textarea:focus{border-color:var(--primary)}.send-btn{width:36px;height:36px;flex-shrink:0;border:none;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer}.send-btn svg{width:20px;height:20px}.send-btn:disabled{background:#8e8e934d;color:#fffc;cursor:default}.closed-bar{display:flex;align-items:center;justify-content:center;gap:12px;padding:14px 16px calc(14px + env(safe-area-inset-bottom));border-top:1px solid var(--border);background:var(--card);color:var(--muted);font-size:14px}.sheet{flex:1;overflow:auto;padding:16px}.field{margin-bottom:18px}.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}.field select,.field textarea{width:100%;padding:12px;border-radius:12px;border:1px solid var(--border);background:var(--card);color:var(--text);font:inherit;font-size:15px;outline:none}.field textarea{resize:vertical;min-height:110px}.field select:focus,.field textarea:focus{border-color:var(--primary)}.thumbs{display:flex;gap:10px;flex-wrap:wrap}.thumb{position:relative;width:72px;height:72px}.thumb img{width:72px;height:72px;object-fit:cover;border-radius:12px;border:1px solid var(--border);cursor:zoom-in;display:block}.thumb-del{position:absolute;top:-6px;right:-6px;width:22px;height:22px;border-radius:50%;border:none;background:#000000a6;color:#fff;font-size:14px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center}.thumb-add{width:72px;height:72px;border-radius:12px;border:1px dashed var(--border);background:var(--card);color:var(--muted);cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;font-size:12px}.thumb-add svg{width:22px;height:22px}.btn.submit{width:100%;padding:13px;border-radius:14px;font-size:16px}#img-viewer{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000eb;display:none;align-items:center;justify-content:center;z-index:100;cursor:zoom-out}#img-viewer.show{display:flex}#img-viewer img{max-width:94vw;max-height:86vh;border-radius:8px}.viewer-close{position:absolute;top:calc(14px + env(safe-area-inset-top));right:16px;width:36px;height:36px;border-radius:50%;border:none;background:#ffffff2e;color:#fff;font-size:22px;line-height:1;cursor:pointer}