:root{color-scheme:light;--brand:#3165e8;--brand-hover:#2556ce;--ink:#172337;--muted:#778397;--line:#e3e8ef;--canvas:#f6f8fb;--surface:#fff;--radius:16px;--viewport-height:100dvh;--viewport-top:0px;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-synthesis:none;color:var(--ink);background:var(--surface)}
*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden}button,input,textarea{font:inherit}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default}button,a{touch-action:manipulation}button{transition:background .16s,color .16s,transform .12s}button:active:not(:disabled){transform:scale(.96)}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #91afff;outline-offset:3px}button:disabled{opacity:.45}button svg{pointer-events:none}svg{width:22px;height:22px;display:block;flex-shrink:0}[hidden]{display:none!important}.app{position:fixed;top:var(--viewport-top);left:0;width:100%;height:100vh;height:var(--viewport-height);display:flex;flex-direction:column;overflow:hidden}.header{flex:none;background:var(--surface);border-bottom:1px solid var(--line);padding:env(safe-area-inset-top) 24px 0}.header-inner{max-width:880px;height:80px;margin:auto;display:flex;align-items:center;gap:16px}.avatar{width:40px;height:40px;flex:none;display:grid;place-items:center;color:var(--brand);overflow:hidden;border-radius:12px}.avatar svg{width:36px;height:36px}.avatar img{width:100%;height:100%;object-fit:cover}.identity{flex:1;min-width:0}.identity h1{font-size:16px;line-height:24px;margin:0;font-weight:650;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.identity p{margin:2px 0 0;font-size:12px;line-height:18px;color:var(--muted)}.identity p[data-online=true]{color:#398367}.icon-button{border:0;background:transparent;color:#5b6b83;min-width:40px;min-height:40px;display:inline-flex;align-items:center;justify-content:center;padding:9px;border-radius:10px}.icon-button:hover{background:#edf1f7;color:var(--ink)}.banner{flex:none;padding:10px 16px;display:flex;justify-content:center;align-items:center;gap:16px;background:#fff7e7;color:#79561f;font-size:13px;line-height:1.6}.banner button{background:transparent;border:0;color:inherit;text-decoration:underline;white-space:nowrap;padding:4px}.timeline{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;background:var(--canvas);scrollbar-width:thin;scrollbar-color:#d3dae5 transparent;-webkit-overflow-scrolling:touch;overflow-anchor:none}.conversation{max-width:880px;margin:auto;padding:28px 0 24px;min-height:100%;display:flex;flex-direction:column}.welcome{flex:1;min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:40px 16px 64px}.welcome-icon{color:var(--brand);margin-bottom:24px}.welcome-icon svg{width:52px;height:52px;stroke-width:1.45}.welcome h2{font-size:26px;line-height:1.5;font-weight:600;letter-spacing:-.5px;margin:0 0 12px}.welcome p{margin:0;color:#798597;font-size:15px;line-height:1.8;max-width:480px;white-space:pre-wrap;overflow-wrap:anywhere}.questions{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:20px}.questions:empty{display:none}.questions button{background:white;border:1px solid var(--line);border-radius:20px;padding:9px 16px;color:#51617a;font-size:13px}.questions button:hover{border-color:#aec2f5;color:var(--brand)}.day{font-size:12px;text-align:center;color:#8792a3;margin:16px 0 28px;line-height:20px}.message{display:flex;flex-direction:column;align-items:flex-start;margin:0 0 20px}.message.visitor{align-items:flex-end}.message.system{align-items:center;margin:16px 0}.bubble{max-width:78%;padding:12px 17px;line-height:1.75;font-size:15px;border:1px solid var(--line);background:white;border-radius:16px 16px 16px 5px;white-space:pre-wrap;overflow-wrap:anywhere;word-break:break-word}.visitor .bubble{background:var(--brand);border-color:var(--brand);color:white;border-radius:16px 16px 5px 16px}.system .bubble{font-size:12px;background:transparent;border:0;color:#7b8596;padding:6px 14px;max-width:92%;text-align:center}.bubble a{color:inherit;text-decoration:underline;text-underline-offset:3px}.bubble.image-bubble{padding:5px;overflow:hidden;white-space:normal}.image-bubble button{border:0;background:none;padding:0;display:block;border-radius:11px;overflow:hidden;min-width:96px;min-height:72px}.image-bubble img{display:block;max-width:300px;max-height:280px;width:auto;height:auto;object-fit:contain}.message-meta{display:flex;align-items:center;gap:6px;font-size:11px;color:#8993a3;margin:6px 2px 0;min-height:16px}.message-meta svg{width:13px;height:13px}.message-meta button{background:none;border:0;color:#a25124;font-size:12px;padding:2px 3px;text-decoration:underline}.message-meta .error{color:#a25124}.history-button{margin:0 auto 16px;border:1px solid var(--line);background:white;border-radius:20px;color:#677890;font-size:12px;padding:9px 18px}.history-note{font-size:12px;line-height:1.7;color:var(--muted);text-align:center;margin:0 0 16px}.typing{display:flex;gap:4px;align-items:center;color:var(--muted);font-size:12px;min-height:24px}.typing i{width:4px;height:4px;border-radius:50%;background:#9aa9c1;animation:pulse 1s infinite}.typing i:nth-child(2){animation-delay:.15s}.typing i:nth-child(3){animation-delay:.3s}.typing span{margin-left:6px}.composer-area{flex:none;position:relative;border-top:1px solid var(--line);background:white;padding:16px 24px max(16px,env(safe-area-inset-bottom))}.composer-inner{max-width:880px;margin:auto}.composer{position:relative;border:1px solid #dce3ef;border-radius:16px;background:white;padding:12px 12px 9px;transition:border-color .15s,box-shadow .15s}.composer:focus-within{border-color:#97b2f1;box-shadow:0 0 0 3px #3165e80b}.composer textarea{border:0;resize:none;outline:none!important;display:block;width:100%;height:38px;min-height:38px;max-height:160px;padding:5px 7px;background:transparent;color:var(--ink);font-size:15px;line-height:24px;overflow:auto;scrollbar-width:thin}.composer textarea::placeholder{color:#8c97a8}.toolbar{display:flex;align-items:center;gap:4px;margin-top:4px}.toolbar-space{flex:1}.send-button{border:0;border-radius:10px;background:var(--brand);color:white;width:38px;height:38px;display:grid;place-items:center}.send-button:hover:not(:disabled){background:var(--brand-hover)}.send-button:disabled{opacity:1;background:#eaf0fe;color:#9ab4f2}.composer-meta{display:flex;justify-content:space-between;color:#8591a6;font-size:11px;line-height:18px;margin-top:8px}.latest{position:absolute;bottom:calc(100% + 16px);left:50%;transform:translateX(-50%);background:white;border:1px solid #d8e1f0;color:var(--brand);box-shadow:0 4px 16px #2137640c;border-radius:24px;padding:10px 18px;font-size:13px;white-space:nowrap}.latest:active:not(:disabled){transform:translateX(-50%) scale(.98)}.emoji-panel{position:absolute;bottom:calc(100% + 10px);left:0;width:288px;max-width:100%;display:grid;grid-template-columns:repeat(6,1fr);gap:2px;padding:10px;border:1px solid var(--line);border-radius:14px;background:white;box-shadow:0 8px 32px #25335412;z-index:2}.emoji-panel button{border:0;background:white;border-radius:8px;font-size:23px;line-height:38px}.emoji-panel button:hover{background:#edf2fc}.attachment{display:flex;align-items:center;gap:12px;margin-bottom:10px;font-size:12px;color:#68778f}.attachment img{width:44px;height:44px;object-fit:cover;border-radius:8px}.attachment span{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.toast{position:absolute;left:50%;bottom:180px;transform:translateX(-50%);max-width:90%;background:#26354b;color:white;padding:12px 18px;border-radius:12px;font-size:13px;line-height:1.6;z-index:5}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}dialog{border:1px solid var(--line);border-radius:20px;max-width:calc(100% - 32px);color:var(--ink);padding:24px;box-shadow:0 24px 100px #17233725}dialog::backdrop{background:#17233770;backdrop-filter:blur(3px)}.contact-dialog{width:420px;max-height:85%;overflow:auto}.dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:-6px -6px 16px 0}.dialog-heading h2{font-size:18px;margin:0}.contact-dialog p{font-size:13px;line-height:1.8;color:var(--muted)}#contact-form{display:flex;flex-direction:column;gap:8px}#contact-form label{font-size:12px;margin-top:12px}#contact-form input{width:100%;border:1px solid var(--line);padding:12px;border-radius:10px;font-size:16px;color:var(--ink)}.primary-button{background:var(--brand);color:white;border:0;border-radius:10px;padding:12px 16px;font-size:14px;margin-top:12px}#contact-links a,#contact-links button{display:block;background:none;border:0;color:var(--brand);font-size:13px;margin:8px 0;overflow-wrap:anywhere}.image-dialog{padding:12px;background:#fff;max-width:94vw;max-height:94dvh}.image-dialog form{display:flex;justify-content:flex-end}.image-dialog img{display:block;max-width:85vw;max-height:70dvh;object-fit:contain}.image-dialog>a{display:block;text-align:center;padding:12px;color:var(--brand);font-size:13px}.loading{animation:pulse 1s infinite}@keyframes pulse{50%{opacity:.35}}
@media(max-width:940px){.conversation{padding-left:24px;padding-right:24px}}
@media(max-width:600px){.header{padding-left:16px;padding-right:12px}.header-inner{height:66px;gap:10px}.avatar{width:36px;height:36px}.avatar svg{width:30px;height:30px}.identity h1{font-size:15px}.header .icon-button{min-width:38px}.conversation{padding:20px 16px 16px}.welcome{padding:32px 10px 48px}.welcome h2{font-size:22px}.welcome p{font-size:14px;max-width:290px}.welcome-icon{margin-bottom:20px}.welcome-icon svg{width:46px;height:46px}.composer-area{padding:10px 12px max(10px,env(safe-area-inset-bottom))}.composer{padding:8px 8px 7px;border-radius:14px}.composer textarea{font-size:16px;max-height:112px;padding-left:6px}.toolbar{margin-top:0}.icon-button{min-width:42px;min-height:42px}.send-button{height:40px;width:40px}.composer-meta{justify-content:flex-end;font-size:10px;margin-top:4px;line-height:14px}.keyboard-hint{display:none}.bubble{max-width:86%;font-size:15px;padding:10px 14px}.image-bubble img{max-width:min(260px,65vw);max-height:250px}.message{margin-bottom:18px}.banner{font-size:12px;gap:10px;padding:8px 12px}.toast{bottom:160px}.contact-dialog{padding:20px}.day{margin:12px 0 22px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.image-bubble button{position:relative}.image-loading-label{position:absolute;inset:0;display:grid;place-items:center;padding:12px;color:#778397;background:#eef2f8;font-size:12px;line-height:1.6;white-space:normal}