:root{--paper:#F4F6FA;--ink:#0B0F1A;--muted:#697386;--line:#dfe4ed;--accent:#3B82F6;--sage:#edf1f8;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button{cursor:pointer}button:disabled{cursor:wait;opacity:.55}.hidden{display:none!important}a{color:inherit;text-decoration:none}.wordmark{font-size:24px;font-weight:700;letter-spacing:-1px}.wordmark span{font-weight:400;letter-spacing:3px;font-size:13px;margin-left:8px}.eyebrow{font-size:10px;font-weight:600;letter-spacing:2.3px;color:var(--muted);line-height:1.6}.muted,.fineprint{color:var(--muted);line-height:1.7}.fineprint{font-size:12px}.error{color:#a94838;font-size:13px;line-height:1.5}.login-shell{min-height:100dvh;display:grid;grid-template-columns:1.1fr 1fr}.login-story{background:var(--sage);padding:46px 56px;display:flex;flex-direction:column;position:relative;overflow:hidden}.story-copy{margin:auto 0;z-index:1}.story-copy h1{font-family:Georgia,serif;font-weight:400;font-size:clamp(38px,4.1vw,64px);line-height:1.15;letter-spacing:-2px;margin:26px 0}.story-copy>p:not(.eyebrow){max-width:330px;font-size:17px;line-height:1.7;color:#65705f}.story-line{height:1px;width:100%;background:#c1cbb7;margin-top:44px;position:relative}.story-line:after{content:"";display:block;height:110px;width:110px;border:1px solid #b7c5aa;border-radius:50%;position:absolute;right:-24px;top:-55px}.story-footer{font-size:12px;color:#78846e;margin-top:40px}.login-form-wrap{display:flex;align-items:center;justify-content:center;padding:48px}.login-form-wrap form{width:100%;max-width:360px}h2{font-size:27px;font-weight:500;letter-spacing:-.8px;margin:14px 0}label{display:block;font-size:12px;font-weight:500;margin:24px 0}input,select,textarea{display:block;width:100%;margin-top:10px;padding:13px 14px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);outline:none}input:focus,select:focus,textarea:focus{border-color:var(--accent)}.primary{display:flex;align-items:center;justify-content:space-between;gap:15px;width:100%;padding:14px 17px;border:0;border-radius:8px;background:var(--ink);color:white;font-size:13px}.primary:hover{background:#3c4737}.text-button{border:0;background:none;font-size:12px;padding:10px 0;color:var(--muted);text-align:left}.danger{color:#a94838}.app-shell{height:100dvh;display:grid;grid-template-columns:260px minmax(0,1fr)}aside{background:#f0f1eb;border-right:1px solid var(--line);padding:30px 20px 16px;display:flex;flex-direction:column;gap:24px;overflow:hidden}aside .wordmark{padding:0 10px}.new-chat{display:flex;gap:14px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:9px;padding:13px 16px;text-align:left;font-size:13px}.list-label{margin:6px 10px 0}#conversation-list{flex:1;overflow:auto;margin:-12px -8px 0}#conversation-list button{display:block;width:100%;border:0;background:transparent;text-align:left;padding:13px 18px;border-radius:7px;font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#60665c}#conversation-list button:hover,#conversation-list button.selected{background:#e2e8d9;color:#303b2b}.account-button{display:flex;align-items:center;gap:12px;background:transparent;border:0;border-top:1px solid #dfe2d8;padding:20px 7px 0;font-size:12px}.avatar{display:inline-grid;place-items:center;width:30px;height:30px;background:#dce4d3;border-radius:50%}#account-name{flex:1;text-align:left}.chat-main{display:flex;flex-direction:column;min-width:0}.chat-header{height:74px;display:flex;align-items:center;gap:18px;padding:0 34px;border-bottom:1px solid var(--line);font-size:13px}.header-note{margin-left:auto;font-size:11px;color:#999d94}.icon-button{padding:7px 10px;border:0;background:transparent;color:#737a6a;font-size:18px}#menu{display:none}.messages{flex:1;overflow:auto;padding:32px max(28px,calc((100% - 740px)/2));scroll-behavior:smooth}.welcome{height:100%;min-height:260px;display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center}.welcome-mark{font-family:Georgia,serif;font-size:44px;line-height:1.5;color:#6a7f57;display:block}.welcome h1{font:400 clamp(30px,4vw,42px)/1.2 Georgia,serif;letter-spacing:-1px;margin:12px 0 16px}.welcome>p:last-child{font-size:13px;color:var(--muted);line-height:1.7;max-width:340px}.message{margin:0 0 30px;line-height:1.85;font-size:14px;overflow-wrap:anywhere}.message .role{font-size:10px;text-transform:uppercase;letter-spacing:1.5px;color:#89937f;margin-bottom:10px}.message.user{margin-left:auto;max-width:85%;background:#eef1e8;border:1px solid #e5e9dd;border-radius:12px;padding:14px 20px}.message.user .role{display:none}.message-body{white-space:pre-wrap}.answer-actions{display:flex;align-items:center;gap:14px;margin-top:10px}.answer-actions button{border:0;background:transparent;padding:4px 0;color:#8c9385;font-size:11px}.answer-actions .pending{color:#a4753c}.thinking{font-size:12px;color:#8a9480;padding:16px 0}.composer-area{padding:8px max(28px,calc((100% - 740px)/2)) 14px}.composer{background:#fff;border:1px solid #dfe3d8;border-radius:14px;padding:14px 18px;box-shadow:0 4px 16px #262b2005}.composer textarea{margin:0;padding:0;border:0;background:transparent;resize:none;max-height:160px;font-size:14px;line-height:1.7;min-height:26px}.composer textarea:focus{border:0}.composer-bottom{display:flex;align-items:center;justify-content:space-between;margin-top:16px}.composer-bottom span{font-size:10px;color:#a0a598}.composer-bottom button{border:0;background:var(--accent);color:white;border-radius:8px;width:34px;height:32px;font-size:19px}.composer-footnote{text-align:center;font-size:10px;color:#a2a89a;margin:12px 0 0}dialog{border:1px solid var(--line);border-radius:18px;width:min(92vw,460px);padding:28px;background:var(--paper);color:var(--ink)}dialog::backdrop{background:#25292555;backdrop-filter:blur(3px)}.dialog-heading{display:flex;justify-content:space-between;align-items:start}.dialog-heading .eyebrow{margin:0}.settings-actions{display:flex;gap:18px;flex-wrap:wrap;align-items:center}hr{border:0;border-top:1px solid var(--line);margin:24px 0 6px}@media(max-width:760px){.login-shell{grid-template-columns:1fr}.login-story{padding:26px 28px;min-height:280px}.story-copy{margin:28px 0 0}.story-copy h1{font-size:37px}.story-copy>p:not(.eyebrow),.story-line,.story-footer{display:none}.login-form-wrap{padding:32px 28px}.app-shell{grid-template-columns:1fr}aside{position:fixed;left:0;top:0;bottom:0;width:260px;z-index:5;transform:translateX(-100%);transition:transform .2s}aside.open{transform:translateX(0)}#sidebar-backdrop{position:fixed;inset:0;background:#232b2455;z-index:4}#menu{display:block}.chat-header{height:62px;padding:0 18px}.header-note{display:none}.messages{padding:24px 20px}.composer-area{padding:8px 16px 16px}.composer-bottom span{font-size:9px}.message.user{max-width:95%}}@media(prefers-reduced-motion:reduce){.messages{scroll-behavior:auto}aside{transition:none}}

.story-copy h1{white-space:pre-line}.locale-control{display:flex;align-items:center;gap:14px;margin:0 0 24px}.locale-control select{width:auto;max-width:190px;margin:0;padding:8px 12px}.empty-list{padding:12px 18px;font-size:12px;color:var(--muted);line-height:1.6}html[lang="zh-CN"] .story-copy h1{letter-spacing:0;line-height:1.4}html[lang="zh-CN"] .eyebrow{letter-spacing:1px}
.login-story{background:#0B0F1A;color:#F4F6FA}.login-story .eyebrow,.story-copy>p:not(.eyebrow){color:#a9b4ca}.story-copy h1{font-family:inherit;font-size:clamp(36px,3.6vw,54px);font-weight:500;letter-spacing:-1.4px}.story-footer{color:#96a5c3;font-size:10px;letter-spacing:3px}.story-line{background:linear-gradient(90deg,#3B82F6,#8B5CF6);opacity:.6}.story-line:after{border-color:#323c55}.wordmark img{display:block;width:100%;height:auto}.login-brand{width:min(100%,380px)}.sidebar-brand{width:190px;max-width:100%;margin:0 2px 8px;padding:0!important}.primary{background:#0B0F1A;justify-content:center;min-height:44px;line-height:1.4}.primary:hover{background:#20283b}.login-form-wrap .primary{justify-content:space-between}aside{background:#edf1f8;gap:14px;padding:28px 18px 16px}.sidebar-actions{display:flex;flex-direction:column;gap:7px}.new-chat,.new-folder{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:9px;text-align:left;font-size:13px;line-height:1.4}.new-chat{color:#0B0F1A;border-color:#dce3ef;min-height:44px}.new-folder{border:0;background:transparent;color:#667187;min-height:40px}.new-folder:hover{background:#e3e9f4}.list-label{margin:4px 10px 0;font-size:9px;letter-spacing:1.7px}#conversation-list{margin:0 -6px;min-height:40px}.folder-section{margin-bottom:12px}.folder-heading{display:flex;align-items:center;gap:3px;min-height:36px}.folder-heading h3{margin:8px 12px;font-size:11px;font-weight:600;color:#7c879b}#conversation-list .folder-toggle{display:flex;align-items:center;gap:7px;flex:1;min-width:0;width:auto;padding:9px 10px;color:#3e4b63;font-size:12px;font-weight:600;border-radius:7px}.folder-label{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.folder-chevron{width:12px;flex:none;font-size:17px;line-height:1}.folder-conversations{padding-left:8px}.conversation-row{display:flex;align-items:center;border-radius:8px;gap:2px;padding:0 2px;border:1px solid transparent}.conversation-row:hover{background:#e4eaf4}.conversation-row.selected{background:#dfe9fc;border-color:#cadbf8}#conversation-list .conversation-open{flex:1;min-width:0;width:auto;padding:11px 9px;font-size:12px;color:#5f6d83;background:transparent}#conversation-list .conversation-row.selected .conversation-open{color:#173e83}#conversation-list .row-menu{width:32px;flex:none;min-height:34px;padding:6px 8px;font-size:18px;color:#8792a6;background:transparent}#conversation-list .row-menu:hover{background:#d7e1f1;color:#0B0F1A}.empty-folder{font-size:11px;color:#8a95a8;line-height:1.6;margin:8px 10px 10px}.account-button{border-color:#d7deeb;min-height:52px;padding-top:16px}.avatar{background:#d9e3f6;color:#345891}.header-note{color:#8996ab}.welcome-mark{width:124px;height:auto;display:block;margin-bottom:14px}.welcome h1{font-family:inherit;font-weight:400;letter-spacing:-.8px}.message{font-size:14px;line-height:1.9}.message .role{color:#74819a}.message.user{background:#eaf0fc;border-color:#dfe7f6}.answer-actions button{color:#77849b;min-height:30px}.answer-actions .pending{color:#966b35}.thinking{color:#76849e}.composer{border-color:#dce3ef;box-shadow:0 4px 20px #0B0F1A06;padding:15px 18px}.composer-bottom button{background:linear-gradient(135deg,#3B82F6,#8B5CF6);width:36px;height:34px}.composer-footnote{color:#8995ab}.composer-bottom span{color:#8a96ab}.icon-button{color:#65728c}dialog{max-height:calc(100dvh - 32px);overflow-y:auto;background:#F4F6FA}dialog::backdrop{background:#0B0F1A66}.settings-actions{gap:14px}.secondary{background:#fff;border:1px solid #d8e0ed;color:#34415a;border-radius:8px;padding:11px 16px;font-size:13px;min-height:44px;line-height:1.4}.secondary:hover{background:#eaf0fb}.secondary.danger{color:#a94838}.dialog-buttons{display:flex;gap:10px;margin-top:22px}.dialog-buttons button{flex:1;width:auto}.delete-confirm{background:#a94838}.delete-confirm:hover{background:#8f3528}.folder-action-buttons{display:flex;flex-direction:column;gap:12px}.user-label{font-size:14px;overflow-wrap:anywhere;color:#3e4b63}:focus-visible{outline:2px solid #3B82F6;outline-offset:3px}@media(max-width:760px){aside{width:min(290px,88vw)}.login-brand{width:260px;max-width:100%}.sidebar-brand{width:180px}.story-copy h1{font-size:34px}.login-story{padding:28px;min-height:285px}#conversation-list .row-menu{min-height:40px;width:38px}.folder-heading{min-height:40px}.folder-conversations{padding-left:6px}.chat-header{padding:0 14px}.composer{padding:13px 15px}.composer-bottom span{max-width:calc(100% - 45px);line-height:1.6}dialog{padding:24px}.locale-control{flex-wrap:wrap}}

/* Assistant Markdown only; user text remains pre-wrapped. */
.message-body.markdown{white-space:normal;overflow-wrap:anywhere;min-width:0}.markdown>:first-child{margin-top:0}.markdown>:last-child{margin-bottom:0}.markdown p{margin:.65em 0}.markdown h1,.markdown h2,.markdown h3,.markdown h4,.markdown h5,.markdown h6{font-size:1.12em;line-height:1.5;margin:1em 0 .4em;font-weight:650}.markdown h1{font-size:1.35em}.markdown h2{font-size:1.2em}.markdown ul,.markdown ol{padding-left:1.5em;margin:.6em 0}.markdown li{margin:.25em 0}.markdown code{font: .9em ui-monospace,SFMono-Regular,Consolas,monospace;background:#edf0f6;padding:.12em .3em;border-radius:4px}.markdown pre{max-width:100%;overflow-x:auto;padding:1em;border-radius:10px;background:#edf0f6;white-space:pre;tab-size:4}.markdown pre code{padding:0;background:transparent;white-space:pre}.markdown blockquote{margin:.7em 0;border-left:3px solid #3B82F6;padding-left:1em;color:#4f5b70}.markdown a{color:#315bd9;text-decoration:underline;text-underline-offset:3px}

.region-control{display:inline-flex;align-items:center;gap:7px;font-size:12px;margin:0;flex-shrink:0}.region-control select{width:auto;max-width:230px;font-size:12px;padding:5px 8px;border:1px solid #dce1eb;border-radius:7px;background:white;color:#0b0f1a}.region-status{font-size:12px;color:#697387}.chat-header{flex-wrap:wrap}.chat-header .region-status:empty{display:none}.login-form-wrap .region-control{margin:0 0 16px}.login-form-wrap .region-status{display:block}.history-state{padding:12px 8px;color:var(--muted);font-size:13px}.history-state p{margin:8px 0}.history-state button{font-size:12px;padding:6px 10px;border:1px solid #596176;border-radius:7px;background:transparent;color:inherit;cursor:pointer}
@media(max-width:640px){.region-control select{max-width:170px}.chat-header .region-control{font-size:11px;gap:4px}.chat-header .region-status{flex-basis:100%}.login-form-wrap .region-control{flex-wrap:wrap}}

.chat-header{height:auto;min-height:74px;padding-top:12px;padding-bottom:12px}
@media(max-width:760px){.chat-header{min-height:62px;gap:10px}}