:root{color:#222;font-synthesis:none;text-rendering:optimizelegibility;--wechat-bg:#ededed;--wechat-green:#95ec69;--wechat-dark:#111;--line:#dcdcdc;--muted:#8a8a8a;--blue:#4d8cf7;background:#ededed;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,PingFang SC,Noto Sans CJK SC,sans-serif}*{box-sizing:border-box}html,body,#root{min-height:100%;margin:0}body{background:var(--wechat-bg);min-width:320px}button,textarea,input{font:inherit}button{cursor:pointer;border:0}.chat-app{background:var(--wechat-bg);width:100%;min-height:100dvh;display:flex}.chat-sidebar{z-index:4;background:#f7f7f7;border-right:1px solid #d7d7d7;flex-direction:column;flex:0 0 296px;min-height:100dvh;display:flex;position:relative}.sidebar-profile{align-items:center;gap:10px;padding:20px 16px 14px;display:flex}.profile-avatar,.assistant-avatar,.message-avatar{color:#fff;flex:none;place-items:center;font-weight:650;display:grid}.profile-avatar{background:#6b8e77;border-radius:9px;width:42px;height:42px;font-size:15px}.sidebar-profile strong,.sidebar-profile span{display:block}.sidebar-profile strong{font-size:15px}.sidebar-profile span{color:var(--muted);margin-top:4px;font-size:11px}.sidebar-profile .icon-button{margin-left:auto}.sidebar-actions{align-items:center;gap:8px;padding:0 12px 13px;display:flex}.icon-button{color:#555;background:0 0;border-radius:6px;place-items:center;width:38px;height:38px;display:inline-grid}.icon-button:hover{background:#e8e8e8}.conversation-list{flex:1;padding:2px 8px;overflow-y:auto}.conversation-item{color:#222;text-align:left;background:0 0;border-radius:6px;align-items:center;gap:10px;width:100%;margin-bottom:2px;padding:10px 9px;display:flex}.conversation-item:hover{background:#e9e9e9}.conversation-item.is-active{background:#dedede}.conversation-avatar{color:#fff;background:#738caf;border-radius:7px;place-items:center;width:38px;height:38px;display:grid}.conversation-copy{min-width:0}.conversation-copy strong,.conversation-copy small{white-space:nowrap;text-overflow:ellipsis;display:block;overflow:hidden}.conversation-copy strong{font-size:14px;font-weight:550}.conversation-copy small{color:var(--muted);margin-top:4px;font-size:11px}.sidebar-footer{color:var(--muted);padding:14px 16px 18px;font-size:11px}.status-dot,.online-dot{background:#07c160;border-radius:50%;width:7px;height:7px;margin-right:4px;display:inline-block}.chat-main{background:var(--wechat-bg);flex-direction:column;flex:1;min-width:0;min-height:100dvh;display:flex}.chat-header{border-bottom:1px solid var(--line);background:#f7f7f7;flex:0 0 62px;align-items:center;gap:10px;padding:0 22px;display:flex}.assistant-avatar{background:#678bb3;border-radius:8px;width:35px;height:35px;font-size:12px}.assistant-avatar.small{border-radius:7px;width:31px;height:31px;font-size:10px}.header-copy{min-width:0}.header-copy strong,.header-copy span{display:block}.header-copy strong{font-size:15px;font-weight:600}.header-copy span{color:var(--muted);margin-top:3px;font-size:11px}.header-more{margin-left:auto}.message-area{scroll-behavior:smooth;flex:1;padding:18px clamp(14px,4vw,64px) 26px;overflow-y:auto}.message-day{max-width:820px;margin:0 auto}.day-divider{color:#a0a0a0;justify-content:center;align-items:center;margin:8px 0 18px;font-size:11px;display:flex}.day-divider span{padding:0 10px}.message-row{align-items:flex-start;gap:9px;margin:0 auto 18px;display:flex}.message-row.user{flex-direction:row-reverse}.message-avatar{border-radius:7px;width:35px;height:35px;font-size:11px}.message-avatar.assistant{background:#678bb3}.message-avatar.user{background:#6b8e77}.message-stack{align-items:flex-end;gap:8px;max-width:min(76%,640px);display:flex}.message-row.user .message-stack{flex-direction:row-reverse}.message-bubble{color:#222;background:#fff;border-radius:5px;min-width:38px;padding:10px 12px;font-size:14px;line-height:1.65;position:relative;box-shadow:0 1px 1px #00000008}.message-row.user .message-bubble{background:var(--wechat-green)}.message-bubble p{white-space:pre-wrap;overflow-wrap:anywhere;margin:0}.message-stack time{color:#a2a2a2;white-space:nowrap;flex:none;margin-bottom:4px;font-size:10px}.message-attachments{gap:8px;margin-bottom:6px;display:grid}.message-attachments img{object-fit:cover;border-radius:4px;width:min(250px,100%);max-height:240px;display:block}.file-attachment{color:#333;background:#0000000a;border-radius:5px;align-items:center;gap:9px;min-width:190px;padding:8px;text-decoration:none;display:flex}.file-attachment span{min-width:0}.file-attachment strong,.file-attachment small{white-space:nowrap;text-overflow:ellipsis;display:block;overflow:hidden}.file-attachment strong{max-width:210px;font-size:12px;font-weight:550}.file-attachment small{color:var(--muted);margin-top:2px;font-size:10px}.empty-chat,.state-message{min-height:100%;color:var(--muted);text-align:center;align-content:center;place-items:center;display:grid}.empty-chat h2{color:#444;margin:14px 0 5px;font-size:19px;font-weight:600}.empty-chat p{margin:0;font-size:13px}.empty-avatar{color:#fff;background:#678bb3;border-radius:18px;place-items:center;width:62px;height:62px;display:grid}.quick-prompts{gap:8px;margin-top:22px;display:flex}.quick-prompts button{color:#666;background:#f8f8f8;border:1px solid #d9d9d9;border-radius:5px;padding:8px 12px;font-size:12px}.quick-prompts button:hover{color:#333;background:#fff}.typing-row{align-items:center;gap:9px;max-width:820px;margin:0 auto;display:flex}.typing-bubble{background:#fff;border-radius:5px;align-items:center;gap:4px;height:34px;padding:0 13px;display:flex}.typing-bubble span{background:#9c9c9c;border-radius:50%;width:5px;height:5px;animation:1s ease-in-out infinite bounce}.typing-bubble span:nth-child(2){animation-delay:.12s}.typing-bubble span:nth-child(3){animation-delay:.24s}@keyframes bounce{0%,60%,to{opacity:.5;transform:translateY(0)}30%{opacity:1;transform:translateY(-3px)}}.error-banner{color:#a33d3d;background:#fff1f1;border:1px solid #f0c4c4;border-radius:6px;justify-content:space-between;align-items:center;gap:10px;margin:0 clamp(14px,4vw,64px) 8px;padding:8px 11px;font-size:12px;display:flex}.error-banner button{color:inherit;background:0 0;place-items:center;display:grid}.composer-shell{padding:8px clamp(12px, 4vw, 58px) max(12px, env(safe-area-inset-bottom));border-top:1px solid var(--line);background:#f7f7f7;position:relative}.voice-status{color:#858585;max-width:820px;margin:0 auto 6px;font-size:11px}.pending-attachments{flex-wrap:wrap;gap:8px;max-width:820px;margin:0 auto 8px;display:flex}.pending-card{background:#fff;border:1px solid #dedede;border-radius:6px;align-items:center;gap:7px;width:200px;padding:6px 8px;display:flex;position:relative}.pending-card img{object-fit:cover;border-radius:3px;width:38px;height:38px}.pending-copy{min-width:0}.pending-copy strong,.pending-copy small{white-space:nowrap;text-overflow:ellipsis;display:block;overflow:hidden}.pending-copy strong{font-size:11px;font-weight:550}.pending-copy small{color:var(--muted);margin-top:3px;font-size:10px}.pending-card button{color:#999;background:0 0;place-items:center;margin-left:auto;display:grid}.toolbar-button,.mode-button{color:#555;background:0 0;border-radius:6px;place-items:center;width:35px;height:35px;display:grid}.toolbar-button:hover,.mode-button:hover{background:#e6e6e6}.attach-wrap{position:relative}.attach-menu{z-index:8;background:#fff;border:1px solid #ddd;border-radius:7px;gap:2px;width:112px;padding:6px;display:grid;position:absolute;bottom:42px;left:0;box-shadow:0 4px 15px #0000001f}.attach-menu button{color:#444;text-align:left;background:#fff;border-radius:5px;align-items:center;gap:8px;padding:8px;font-size:12px;display:flex}.attach-menu button:hover{background:#f1f1f1}.hidden-input{display:none}.composer-form{align-items:flex-end;gap:7px;max-width:820px;margin:0 auto;display:flex}.composer-form textarea{resize:none;color:#222;background:#fff;border:1px solid #d5d5d5;border-radius:6px;outline:none;flex:1;min-height:38px;max-height:140px;padding:9px 11px;font-size:14px;line-height:1.45}.composer-form textarea:focus{border-color:#a9c6b0;box-shadow:0 0 0 2px #07c16014}.composer-form textarea::placeholder{color:#aaa}.send-button{color:#fff;background:#07c160;border-radius:6px;place-items:center;width:38px;height:38px;display:grid}.send-button:disabled{opacity:.6}.hold-to-talk{color:#555;touch-action:none;background:#fff;border:1px solid #d4d4d4;border-radius:6px;flex:1;height:38px;font-size:13px}.hold-to-talk.is-recording{color:#fff;background:#d9534f;border-color:#d9534f}.mobile-only{display:none}@media (width<=760px){.chat-sidebar{width:min(86vw,320px);transition:transform .2s;position:fixed;inset:0 auto 0 0;transform:translate(-102%);box-shadow:8px 0 24px #0000001f}.chat-sidebar.is-open{transform:translate(0)}.sidebar-scrim{z-index:3;background:#00000040;display:block;position:fixed;inset:0}.mobile-only{display:inline-grid}.desktop-only{display:none}.chat-header{flex-basis:56px;padding:0 10px}.chat-header .mobile-only{flex:none}.header-more{margin-left:auto}.message-area{padding:13px 11px 18px}.message-stack{max-width:82%}.message-bubble{padding:8px 10px;font-size:14px}.composer-shell{padding-left:9px;padding-right:9px}.error-banner{margin-left:9px;margin-right:9px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.001ms!important;animation-duration:.001ms!important}}