:root{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:#18352f;background:#f8f9f6;font-synthesis:none;-webkit-font-smoothing:antialiased}*{box-sizing:border-box}body{margin:0;min-height:100svh;display:flex;flex-direction:column;background:radial-gradient(ellipse at 50% 32%,#e9efdf77,transparent 57%)}button,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.4}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,textarea:focus-visible{outline:2px solid #739a78;outline-offset:4px}[hidden]{display:none!important}header{height:100px;padding:0 5.2%;display:flex;justify-content:space-between;align-items:center}.brand{display:flex;align-items:center;gap:12px;font-size:23px;letter-spacing:-1px;font-weight:600}.brand b{font-weight:400;color:#748478}.monogram{font-family:Georgia,serif;font-weight:500;font-size:36px;letter-spacing:-5px;line-height:1}.monogram span{color:#9cae73}nav{display:flex;gap:32px;align-items:center;font-size:13px}nav a{color:#64706a}nav a span{margin-left:5px}.new-chat{border:1px solid #dce2d8;border-radius:30px;background:transparent;padding:10px 18px;color:#355247}main{flex:1;width:100%;padding:5vh 24px 32px}.intro{text-align:center;margin:0 auto 42px}.eyebrow{font-size:10px;letter-spacing:3px;display:flex;justify-content:center;align-items:center;gap:10px;color:#6b806c;font-weight:600}.eyebrow i,.mode i{width:5px;height:5px;border-radius:50%;background:#7f9965}h1{font-size:clamp(42px,5.1vw,72px);font-weight:520;letter-spacing:-3px;line-height:1.25;margin:26px 0 23px}h1 span{display:block;color:#8a9785;font-size:.76em;font-weight:350;letter-spacing:-2px;margin-top:10px}.subtitle{color:#7b847c;font-size:15px;letter-spacing:.6px;line-height:1.8}.input-area{max-width:800px;margin:auto}.composer{background:#fff;border:1px solid #e1e6dc;border-radius:22px;box-shadow:0 12px 45px -20px #324d3029;overflow:hidden;padding:20px 22px 14px;transition:border-color .2s}.composer:focus-within{border-color:#a1b398}textarea{resize:none;display:block;min-height:74px;max-height:240px;width:100%;outline:none!important;border:0;background:transparent;color:#203c32;font-size:16px;line-height:1.65;padding:2px 0 10px}textarea::placeholder{color:#99a098} .composer-bottom{display:flex;justify-content:space-between;align-items:center}.composer-tools,.composer-actions{display:flex;gap:15px;align-items:center}.attach{font-size:25px;color:#7b897b;border:0;background:none;padding:0;width:28px;height:32px}.mode{display:flex;align-items:center;gap:7px;color:#778374;font-size:12px}.composer-actions>span{font-size:10px;color:#a3aaa0}#send,#stop{width:38px;height:38px;border-radius:50%;background:#254638;color:white;border:none;font-size:25px;line-height:1}#stop{font-size:15px}.suggestions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:22px}.suggestions button{padding:16px 18px;text-align:left;border:1px solid #e1e6dc;background:#ffffff55;border-radius:12px;color:#526351;font-size:13px;display:flex;align-items:center;gap:14px;transition:background .2s}.suggestions button:hover{background:white;border-color:#becdb5}.suggestions span{font-family:Georgia,serif;font-size:12px;color:#99a68e}.suggestions b{margin-left:auto;font-weight:400;color:#9eaa95}.capabilities{display:flex;gap:18px;justify-content:center;align-items:center;color:#9aa294;font-size:11px;letter-spacing:1px;margin-top:48px}.capabilities i{width:2px;height:2px;background:#b4bcae;border-radius:50%}footer{display:flex;justify-content:space-between;gap:20px;padding:24px 5.2%;font-size:10px;color:#929d8e;letter-spacing:.4px}footer b{font-weight:400;margin:0 8px}.attachments{display:flex;gap:8px;flex-wrap:wrap}.attachment{display:flex;gap:10px;align-items:center;padding:6px 10px;background:#f1f5ed;border:1px solid #e3eadc;border-radius:8px;font-size:11px;margin-bottom:12px;max-width:100%}.attachment span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:230px}.attachment button{background:none;border:0;color:#7c8874}.file-status,.context-note{font-size:11px;color:#7e8977;line-height:1.8;margin:10px 6px 0}.file-status:empty{display:none}.error{color:#935345;background:#fff1ed;border-radius:10px;padding:12px;font-size:13px}.conversation{max-width:800px;margin:0 auto 28px}.message{margin-bottom:30px}.message.user{display:flex;justify-content:flex-end}.user .message-content{background:#eaf0e3;color:#354d3d;border-radius:18px 18px 4px 18px;padding:14px 20px;max-width:85%;white-space:pre-wrap;font-size:15px;line-height:1.7}.assistant-label{display:flex;align-items:center;gap:8px;font-size:11px;font-weight:650;letter-spacing:.7px;color:#778a6c;margin-bottom:13px}.assistant-label i{font-family:Georgia,serif;font-size:23px;color:#35533e;font-style:normal}.assistant .message-content{font-size:15px;line-height:1.9;color:#33453a;overflow-wrap:anywhere}.assistant p{margin:0 0 14px}.assistant h2,.assistant h3{font-size:18px;margin:22px 0 12px;font-weight:600}.assistant ul,.assistant ol{padding-left:23px;margin:8px 0 18px}.assistant pre{white-space:pre-wrap;background:#eff2ea;padding:14px;border-radius:10px;overflow:auto;font-size:13px}.assistant code{font-size:.9em;background:#edf1e8;padding:2px 4px;border-radius:4px}.assistant table{border-collapse:collapse;font-size:13px;width:100%;margin:14px 0}.assistant td,.assistant th{padding:9px 12px;border:1px solid #dfe6d8;text-align:left}.table-scroll{overflow-x:auto}.message-actions{margin-top:10px}.message-actions button{background:none;border:0;color:#8a9781;font-size:11px;padding:4px 0}.citation{display:inline;border:1px solid #cedbc3;background:#edf3e7;color:#4c6941;border-radius:5px;font-size:11px;padding:1px 5px;margin:0 2px}.thinking{display:flex;gap:5px;padding:12px 0}.thinking i{width:5px;height:5px;border-radius:50%;background:#8ba078;animation:pulse 1.2s infinite}.thinking i:nth-child(2){animation-delay:.2s}.thinking i:nth-child(3){animation-delay:.4s}@keyframes pulse{50%{opacity:.25}}body.chatting main{padding-top:32px}body.chatting .input-area{position:sticky;bottom:0;padding:12px 0;background:linear-gradient(transparent,#f8f9f6 15%)}body.chatting .composer{box-shadow:0 4px 30px #324d3010}body.chatting textarea{min-height:50px}body.chatting .context-note{text-align:center}dialog{border:1px solid #dce4d5;border-radius:20px;width:min(760px,90vw);max-height:85vh;padding:28px;color:#33453a;background:#fafbf8}dialog::backdrop{background:#15271f66;backdrop-filter:blur(3px)}.source-header{display:flex;justify-content:space-between;align-items:center}.source-header h2{font-size:18px}.source-header button{background:none;border:0;font-size:25px;color:#647b5c}.source-notice{font-size:12px;line-height:1.8;color:#84917c}dialog pre{white-space:pre-wrap;line-height:1.8;font:13px/1.9 inherit}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}@media(min-width:1500px){main{padding-top:10vh}}@media(max-width:640px){header{height:80px;padding:0 22px}.brand{font-size:20px}nav{gap:15px;font-size:11px}.new-chat{padding:8px 12px}.monogram{font-size:30px}main{padding:6vh 20px 24px}h1{letter-spacing:-2px;font-size:43px;margin-top:24px}h1 span{font-size:.74em;letter-spacing:-1.5px}.intro{margin-bottom:30px}.subtitle{font-size:12px;letter-spacing:0}.eyebrow{font-size:8px;letter-spacing:2.4px}.composer{padding:17px 16px 12px;border-radius:18px}textarea{font-size:15px;min-height:85px}.suggestions{gap:8px;margin-top:16px}.suggestions button{padding:14px 10px;font-size:11px;gap:8px}.capabilities{gap:10px;font-size:9px;letter-spacing:0;margin-top:32px}.composer-actions>span{display:none}footer{padding:20px;flex-direction:column;gap:8px;font-size:9px}.user .message-content{max-width:92%}.assistant .message-content{font-size:14px}body.chatting main{padding-top:15px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}}
/* Quiet English workspace: white canvas, neutral type, minimal controls. */
:root{color:#242424;background:#fff;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif}body{background:#fff}header{height:88px;padding:0 4.5%}.brand{font-size:21px;gap:10px;letter-spacing:-.7px}.brand b{font-size:12px;color:#888;font-weight:450;letter-spacing:0;margin-left:3px}.monogram{font-size:31px;color:#222}.monogram span{color:#888}nav{gap:18px}.new-chat{border-color:#e6e6e6;color:#666;border-radius:7px;font-size:12px;padding:9px 13px}main{padding:14vh 24px 48px}.intro{margin-bottom:32px}h1{font-family:Georgia,"Times New Roman",serif;font-size:clamp(32px,4vw,46px);font-weight:400;letter-spacing:-1.5px;margin:0 0 16px;line-height:1.25}.subtitle{font-size:14px;font-weight:400;letter-spacing:0;color:#888;margin:0;line-height:1.7}.input-area,.conversation{max-width:720px}.composer{border:1px solid #ddd;border-radius:12px;box-shadow:none;padding:18px 20px 12px}.composer:focus-within{border-color:#999}textarea{font-size:15px;min-height:80px;color:#262626}textarea::placeholder{color:#a0a0a0}.attach{color:#888;font-size:23px}.composer-tools{gap:9px}.mode{color:#aaa;font-size:11px}.composer-actions>span{color:#aaa;font-size:10px}#send,#stop{background:#282828;width:33px;height:33px;font-size:22px}#stop{font-size:12px}#send:disabled{background:#e5e5e5;opacity:1;color:#aaa}.suggestions{display:flex;justify-content:center;flex-wrap:wrap;gap:9px;margin-top:20px}.suggestions button{display:block;padding:8px 12px;border:1px solid #ededed;border-radius:6px;color:#888;background:#fff;font-size:11px}.suggestions button:hover{background:#fafafa;border-color:#ccc;color:#444}footer{padding:24px 4.5%;font-size:10px;letter-spacing:0;color:#aaa}.attachment{background:#f7f7f7;border-color:#e5e5e5;color:#666}.attachment button{color:#777}.file-status,.context-note{color:#999;font-size:10px}.user .message-content{background:#f4f4f4;color:#333}.assistant-label{color:#888;font-size:10px;letter-spacing:.2px;font-weight:500}.assistant-label i{color:#555;font-size:20px}.assistant .message-content{color:#333}.assistant pre,.assistant code{background:#f6f6f6}.assistant td,.assistant th{border-color:#e8e8e8}.message-actions button{color:#999}.citation{background:#f6f6f6;border-color:#ddd;color:#666}.thinking i{background:#999}body.chatting .input-area{background:linear-gradient(transparent,#fff 15%)}body.chatting .composer{box-shadow:none}dialog{color:#333;background:#fff;border-color:#ddd}.source-header button{color:#888}.source-notice{color:#999}@media(min-width:1500px){main{padding-top:17vh}}@media(max-width:640px){header{height:76px;padding:0 22px}.brand{font-size:20px}.new-chat{font-size:10px;padding:8px 10px}main{padding:15vh 20px 32px}h1{font-size:33px;letter-spacing:-1px}.subtitle{font-size:12px;max-width:280px;margin:auto}.intro{margin-bottom:26px}.composer{padding:16px 16px 11px}textarea{font-size:14px;min-height:94px}.suggestions{gap:7px;margin-top:17px}.suggestions button{font-size:10px;padding:8px 10px}footer{font-size:9px;padding:20px 22px;gap:8px}}

#sign-out{border:0;background:none;color:#888;font-size:11px}#account-link{font-size:11px;max-width:180px;overflow:hidden;text-overflow:ellipsis}
.walkthrough{max-width:720px;margin:52px auto 0}.walkthrough-heading{display:flex;align-items:center;justify-content:space-between;color:#777;font-size:11px;margin:0 2px 12px}.walkthrough-heading small{color:#b0b0b0;font-size:9px;margin-left:9px}.walkthrough-heading button{border:0;background:none;color:#999;font-size:10px;padding:5px}.demo-stage{height:245px;border:1px solid #eaeaea;border-radius:12px;background:#fcfcfc;position:relative;overflow:hidden;padding:20px 26px}.demo-caption{display:flex;justify-content:space-between;color:#999;font-size:10px}.demo-time{font-size:8px;letter-spacing:1.4px;color:#bbb}.demo-content{max-width:500px;margin:23px auto 0}.demo-input{height:54px;border:1px solid #e2e2e2;background:white;border-radius:9px;padding:16px 44px 12px 15px;font-size:12px;color:#444;position:relative;line-height:1.7}.demo-send{position:absolute;right:12px;top:13px;background:#292929;color:white;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;font-size:19px}.demo-caret{display:inline-block;width:1px;height:13px;background:#777;vertical-align:middle;animation:caret-blink .9s steps(1) infinite}.demo-document{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid #e8e8e8;border-radius:8px;width:205px;height:0;opacity:0;overflow:hidden;margin-bottom:0;padding:0 12px;transition:height .4s,opacity .4s,margin .4s;font-size:10px}.demo-document>span:first-child{font-size:23px;color:#aaa}.demo-document small{display:block;font-size:8px;color:#aaa;margin-top:3px}.demo-check{margin-left:auto;color:#aaa}.demo-answer{opacity:0;transform:translateY(6px);transition:opacity .5s,transform .5s;margin:15px 4px}.demo-answer-label{font-size:9px;color:#999;margin-bottom:5px}.demo-answer p{margin:0;font-size:11px;line-height:1.7;color:#777}.demo-cursor{position:absolute;left:80%;top:75%;transition:left 1s cubic-bezier(.25,.7,.3,1),top 1s cubic-bezier(.25,.7,.3,1),opacity .5s;filter:drop-shadow(0 2px 2px #0001);pointer-events:none}.demo-stage[data-phase="ask"] .demo-cursor{left:25%;top:40%}.demo-stage[data-phase="attach"] .demo-cursor{left:26%;top:32%}.demo-stage[data-phase="send"] .demo-cursor{left:83%;top:57%}.demo-stage[data-phase="answer"] .demo-cursor{left:88%;top:78%;opacity:.25}.demo-stage[data-phase="follow"] .demo-cursor{left:35%;top:56%}.demo-stage:not([data-phase="ask"]) .demo-document{height:43px;opacity:1;margin-bottom:10px}.demo-stage[data-phase="answer"] .demo-answer,.demo-stage[data-phase="follow"] .demo-answer{opacity:1;transform:translateY(0)}.demo-steps{display:flex;gap:26px;font-size:10px;margin-top:13px;color:#bbb}.demo-steps .active{color:#444}.demo-note{font-size:9px;color:#bbb;margin:10px 0 0}.walkthrough.paused .demo-caret{animation-play-state:paused}.walkthrough.paused .demo-cursor{transition:none}body.chatting .walkthrough{display:none}@keyframes caret-blink{50%{opacity:0}}@media(min-width:641px){main{padding-top:8vh}.intro{margin-bottom:27px}}@media(max-width:640px){main{padding-top:9vh}.walkthrough{margin-top:36px}.walkthrough-heading small{display:none}.demo-stage{padding:17px;height:260px}.demo-input{font-size:11px;height:69px;padding:12px 40px 10px 12px}.demo-caption{font-size:9px}.demo-document{width:190px}.demo-answer p{font-size:10px}.demo-stage[data-phase="send"] .demo-cursor{left:88%;top:54%}}@media(prefers-reduced-motion:reduce){.demo-stage *{transition:none!important;animation:none!important}}

.signin-gate{display:flex;justify-content:space-between;align-items:center;gap:15px;font-size:11px;color:#999;margin:0 2px 14px}.signin-gate>a{color:#333;white-space:nowrap}.signin-gate>a>span{margin-left:5px}.composer textarea:disabled{background:white;cursor:default}.suggestions button:disabled{opacity:.55}@media(max-width:640px){.signin-gate{font-size:10px}}

.animated-title{min-height:1.3em}.title-caret{display:inline-block;width:1.5px;height:.85em;background:#777;margin-left:4px;vertical-align:-.03em;animation:caret-blink 1s steps(1) infinite}.walkthrough{margin-top:32px}.demo-bottom{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:12px}.demo-bottom .demo-note{margin:0}.demo-start{font-size:11px;color:#555;white-space:nowrap}.demo-stage{height:290px}.demo-content{margin-top:33px}@media(max-width:640px){.demo-stage{height:280px}.demo-bottom{align-items:flex-start}.demo-note{max-width:190px}.demo-start{font-size:10px}.animated-title{min-height:2.6em}}@media(prefers-reduced-motion:reduce){.title-caret{display:none}}
.animated-title #animated-title-text{display:inline;color:inherit;font-size:inherit;font-weight:inherit;letter-spacing:inherit;margin:0}.animated-title .title-caret{display:inline-block;margin:0 0 0 4px;color:inherit;font-size:inherit}

/* Editorial landing layout: clear purpose, one demonstration, practical examples. */
.landing-actions{display:flex;gap:22px;align-items:center;margin-top:28px}.landing-primary{background:#242424;border:1px solid #242424;color:#fff;border-radius:6px;font-size:12px;padding:12px 16px}.landing-primary span{margin-left:15px}.landing-secondary{font-size:11px;color:#888}.landing-secondary span{margin-left:5px}.landing-topics{font-size:10px;color:#aaa;margin-top:24px;letter-spacing:.2px}.landing-topics span{margin:0 8px}.landing-usecases{width:100%;max-width:1100px;margin:54px auto 0;padding-top:24px;border-top:1px solid #ededed}.usecases-header{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:24px}.usecases-header h2{font-family:Georgia,serif;font-size:23px;font-weight:400;letter-spacing:-.5px;margin:0;color:#333}.usecases-header>span{font-size:10px;color:#999}.usecases-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px}.usecase{display:block;padding:0 0 5px}.usecase-top{display:flex;align-items:center;justify-content:space-between;color:#777;margin-bottom:16px}.usecase-number{font:10px Georgia,serif;color:#aaa}.usecase h3{font-size:14px;font-weight:500;margin:0 0 10px;letter-spacing:-.15px}.usecase>p{font-size:11px;color:#999;line-height:1.85;margin:0;max-width:290px}.usecase-example{font-family:Georgia,serif;display:flex;gap:12px;justify-content:space-between;font-size:12px;line-height:1.7;margin-top:19px;color:#666;border-top:1px solid #f0f0f0;padding-top:14px}.usecase-example span{font-family:Arial,sans-serif;transition:transform .2s}.usecase:hover .usecase-example span{transform:translate(2px,-2px)}.usecase:hover h3{color:#777}.landing-principles{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #eee;margin-top:36px;padding-top:18px;color:#aaa;font-size:10px}.landing-principles b{font-family:Georgia,serif;font-weight:400;margin-right:9px;color:#ccc}body.chatting .landing-usecases,body.chatting .landing-actions,body.chatting .landing-topics{display:none}body:has(#input-area:not([hidden])) .landing-usecases,body:has(#input-area:not([hidden])) .landing-actions,body:has(#input-area:not([hidden])) .landing-topics{display:none}
@media(min-width:900px){body:has(#input-area[hidden]) main{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);column-gap:64px;row-gap:0;max-width:1200px;margin:0 auto;padding:7vh 48px 32px;align-content:start}body:has(#input-area[hidden]) .intro{grid-column:1;grid-row:1;text-align:left;align-self:center;margin:0}body:has(#input-area[hidden]) .animated-title{font-size:clamp(42px,4.4vw,58px);min-height:2.6em;max-width:450px;letter-spacing:-1.8px}body:has(#input-area[hidden]) .subtitle{font-size:13px;max-width:340px;line-height:1.9}body:has(#input-area[hidden]) .walkthrough{grid-column:2;grid-row:1;width:100%;margin:0;max-width:none}body:has(#input-area[hidden]) .demo-stage{height:300px;padding:20px}body:has(#input-area[hidden]) .demo-input{font-size:11px;height:70px;padding-top:12px}body:has(#input-area[hidden]) .demo-content{margin-top:30px}body:has(#input-area[hidden]) .demo-note{max-width:205px}body:has(#input-area[hidden]) .landing-usecases{grid-column:1/-1;margin-top:50px}body:has(#input-area[hidden]) .usecases-grid{gap:40px}}
@media(max-width:899px){.landing-actions{justify-content:center}.landing-usecases{max-width:720px}.landing-topics{text-align:center}.usecases-header{display:block}.usecases-header>span{display:block;margin-top:9px}.usecases-grid{gap:22px}.usecases-header h2{font-size:22px}.usecase h3{font-size:13px}.landing-usecases{margin-top:38px}}
@media(max-width:640px){main{padding-top:6vh}.animated-title{min-height:1.5em}.landing-actions{gap:16px;margin-top:22px}.landing-primary{font-size:11px;padding:11px 14px}.landing-secondary{font-size:10px}.landing-topics{font-size:9px;margin-top:20px}.walkthrough{margin-top:30px}.usecases-grid{grid-template-columns:1fr;gap:0}.usecase{padding:20px 0;border-bottom:1px solid #eee}.usecase-top{margin-bottom:12px}.usecase>p{max-width:none;font-size:12px}.usecase h3{font-size:16px}.usecase-example{font-size:13px;border-top:0;padding:0;margin-top:12px}.usecases-header{margin-bottom:0}.landing-principles{flex-direction:column;gap:12px;margin-top:20px}.landing-usecases{padding-top:22px}.demo-note{max-width:180px}}