:root{--paper:#f7f6f2;--white:#fff;--ink:#202b27;--muted:#69746d;--green:#385c45;--pale:#e6eadf;--line:#d8ddd4}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:85px}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #709555;outline-offset:4px}[hidden]{display:none!important}.wrap{max-width:1420px;margin:auto;padding-left:60px;padding-right:60px}.site-header{height:96px;display:flex;align-items:center;justify-content:space-between;padding:0 60px;border-bottom:1px solid var(--line);max-width:1600px;margin:auto}.wordmark{display:flex;align-items:center;gap:13px}.mark{display:grid;place-content:center;width:46px;height:43px;background:var(--ink);color:var(--paper);font-size:25px;letter-spacing:-3px;position:relative;font-weight:bold}.mark span{position:absolute;font-size:14px;right:3px;top:1px}.wordmark b{font-size:17px;letter-spacing:2px}.wordmark small{font-size:9px;letter-spacing:1.1px;display:block;margin-top:6px;color:var(--muted)}nav{display:flex;gap:32px;align-items:center;font-size:12px}nav a:hover,.text-link:hover{text-decoration:underline;text-underline-offset:5px}.nav-cta{padding:12px 0;border-bottom:1px solid var(--ink)}.nav-cta span{margin-left:16px}.hero{padding-top:72px;padding-bottom:66px;display:grid;grid-template-columns:1fr 1.12fr;gap:50px;align-items:center}.eyebrow{font-size:10px;font-weight:bold;letter-spacing:1.7px;margin:0 0 22px;line-height:1.6}.live-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--green);margin-right:7px;vertical-align:1px}h1{font-size:clamp(58px,5.9vw,85px);font-weight:500;line-height:1.01;letter-spacing:-4px;margin:0 0 26px}h1 em{font-family:Georgia,'Times New Roman',serif;color:var(--green);font-weight:normal}h2{font-size:clamp(32px,3.3vw,47px);line-height:1.12;font-weight:500;letter-spacing:-1.7px;margin:0}p{line-height:1.65}.lede{font-size:16px;max-width:410px;color:var(--muted);margin-bottom:30px}.hero-actions{display:flex;align-items:center;gap:23px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:space-between;gap:25px;padding:16px 20px;border:1px solid transparent;font-size:12px;font-weight:600;border-radius:2px;min-height:48px}.dark{background:var(--ink);color:var(--paper)}.dark:hover{background:var(--green)}.light{background:var(--paper);color:var(--ink)}.light:hover{background:var(--pale)}.text-link{font-size:12px;line-height:1.6}.hero-meta{display:flex;flex-wrap:wrap;gap:18px;margin-top:31px;font-size:10px;color:var(--muted)}.hero-meta span+span:before{content:'•';margin-right:18px}.hero-art{margin:0;align-self:stretch;display:flex;flex-direction:column;background:#e6e8e5;border:1px solid #d1d6ce;position:relative;min-width:0}.art-top{display:flex;justify-content:space-between;font-size:9px;letter-spacing:1.4px;padding:20px}.hero-art img{width:100%;height:auto;display:block;flex:1;object-fit:contain;mix-blend-mode:multiply}.hero-art figcaption{display:flex;justify-content:space-between;gap:10px;padding:16px 20px;border-top:1px solid #d1d6ce;font-size:9px;color:#58625c;line-height:1.5}.principles{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding-top:8px;padding-bottom:8px}.principles p{font-size:12px;color:var(--muted)}.principles p:before{content:'↗';margin-right:13px;color:var(--green)}.prototype-section{padding-top:85px}.section-intro{display:flex;justify-content:space-between;gap:50px;align-items:flex-end;margin-bottom:32px}.section-intro>p{font-size:14px;max-width:365px;color:var(--muted);margin:0}.workbench{display:grid;grid-template-columns:minmax(0,1fr) 345px;border:1px solid #cdd4cb;background:var(--white);box-shadow:0 20px 50px #23332a08}.model-column{min-width:0;display:flex;flex-direction:column}.model-toolbar{display:flex;justify-content:space-between;align-items:center;gap:10px;border-bottom:1px solid var(--line);height:57px;padding:0 20px}.tabs{height:100%;display:flex;gap:22px}.tabs button{font-size:11px;border:0;border-bottom:2px solid transparent;background:none;padding:0;color:var(--muted)}.tabs button[aria-selected=true]{border-bottom-color:var(--green);color:var(--ink);font-weight:bold}.model-toolbar>a{font-size:10px;white-space:nowrap}#modelPanel,#renderPanel{height:620px;background:#eff2ee;position:relative}#modelFrame{border:0;width:100%;height:100%;display:block}.load-model{display:flex;height:100%;flex-direction:column;justify-content:center;align-items:center;padding:35px;text-align:center;background-image:linear-gradient(#dce2d74d 1px,transparent 1px),linear-gradient(90deg,#dce2d74d 1px,transparent 1px);background-size:35px 35px}.outline-number{font-family:Georgia,serif;font-size:90px;color:#8c9c87;line-height:1}.load-model h3{font-size:26px;font-weight:500;letter-spacing:-.7px}.load-model p{font-size:13px;color:var(--muted);margin-top:0}.load-model small{font-size:10px;color:var(--muted);margin-top:20px}#renderPanel{padding-bottom:88px}#detailImage{height:calc(100% - 46px);width:100%;object-fit:contain;background:#e0e4df}.render-caption{padding:13px 20px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;font-size:10px}.render-caption span{color:var(--muted)}.render-options{padding:12px 20px;display:flex;gap:8px;flex-wrap:wrap}.render-options button{background:white;border:1px solid var(--line);font-size:11px;padding:8px 13px}.render-options button[aria-pressed=true]{background:var(--ink);color:white}.model-status{font-size:10px;color:var(--muted);padding:11px 18px;line-height:1.6;margin-top:auto;border-top:1px solid var(--line);min-height:45px}.guide-column{border-left:1px solid var(--line);padding:22px;display:flex;flex-direction:column;min-width:0}.guide-heading{display:flex;align-items:center;gap:10px;position:relative}.guide-symbol{font-size:30px;color:var(--green)}.guide-heading h3{font-size:15px;margin:0;letter-spacing:-.2px}.guide-heading p{font-size:9px;color:var(--muted);margin:5px 0 0}.tiny-tag{position:absolute;right:0;top:-12px;font-size:7px;color:var(--muted);letter-spacing:1px}.guide-mode{display:flex;margin-top:21px;background:#f1f3ee;border-radius:3px;padding:3px}.guide-mode button{flex:1;border:0;background:none;padding:9px 5px;font-size:10px;color:var(--muted)}.guide-mode button[aria-pressed=true]{background:white;box-shadow:0 1px 5px #20302613;color:var(--ink)}.guide-notice{font-size:10px;line-height:1.6;color:#626f5d;border-left:2px solid #8ca77e;padding:0 0 0 10px;margin-top:16px;min-height:48px}.voice-orb{display:flex;gap:5px;align-items:center;justify-content:center;width:90px;height:90px;background:radial-gradient(circle at 35% 25%,#eef3df,#c6d4b7);box-shadow:0 0 0 9px #f2f5ec;border:1px solid #cbd8bc;border-radius:50%;margin:25px auto 9px}.voice-orb span{width:3px;height:13px;border-radius:4px;background:#365541}.voice-orb span:nth-child(2),.voice-orb span:nth-child(4){height:23px}.voice-orb span:nth-child(3){height:32px}.voice-orb.speaking span{animation:wave .65s ease-in-out infinite alternate}.voice-orb.speaking span:nth-child(2n){animation-delay:-.3s}.voice-orb.listening{box-shadow:0 0 0 9px #e5eedb;border-color:#617b50}@keyframes wave{to{transform:scaleY(.4)}}.voice-status{text-align:center;font-size:11px;color:var(--muted);margin:8px 0 16px;min-height:18px}.call-controls{display:flex;gap:8px}.call-controls>.button{flex:1;padding:12px 15px;font-size:11px}.end-call{width:43px;border:1px solid #e0c9c3;background:#f8eeeb;color:#9e5041;border-radius:2px}.voice-options{display:flex;justify-content:space-between;align-items:center;margin:12px 0 16px;gap:8px}.voice-options label{font-size:9px;color:var(--muted);display:flex;align-items:center;gap:4px}.voice-options input{accent-color:var(--green)}.voice-options button{font-size:9px;background:none;border:0;text-decoration:underline;padding:6px 0}.conversation{max-height:210px;min-height:130px;overflow-y:auto;padding-right:5px;overscroll-behavior:contain;border-top:1px solid var(--line);padding-top:13px}.message{margin:0 0 15px}.message small{font-size:8px;letter-spacing:1px;color:var(--green);font-weight:bold}.message p{font-size:12px;line-height:1.6;margin:4px 0 0;color:#455349;overflow-wrap:anywhere}.message.user small{color:#8b897e}.question-chips{display:flex;gap:5px;flex-wrap:wrap;margin:9px 0 12px}.question-chips button{border:1px solid var(--line);padding:7px 8px;font-size:9px;background:#f8f9f5;text-align:left;border-radius:3px}.question-chips button:hover{border-color:var(--green)}.question-form{display:flex;border:1px solid #cbd2c6;border-radius:3px;padding:4px;background:white}.question-form input{min-width:0;width:100%;border:0;outline:0;padding:9px 6px;font-size:11px}.question-form button{background:var(--ink);color:white;border:0;border-radius:2px;min-width:32px}.guide-footnote{font-size:9px;color:var(--muted);line-height:1.6;margin:11px 0 0}.case-disclosure{font-size:11px;line-height:1.8;color:var(--muted);max-width:1050px;margin:18px 0 0}.case-disclosure b{color:var(--ink)}.detail-story{display:grid;grid-template-columns:.85fr 1.15fr;gap:70px;align-items:center;padding-top:105px;padding-bottom:95px}.detail-story>div>p:not(.eyebrow){font-size:14px;color:var(--muted);max-width:340px}.detail-story figure{margin:0}.detail-story img{display:block;width:100%;height:auto;border:1px solid var(--line)}figcaption{font-size:10px;color:var(--muted);margin-top:0}.detail-story figcaption{margin-top:12px}.process{padding-top:55px;padding-bottom:85px;border-top:1px solid var(--line)}.process-list{display:grid;grid-template-columns:repeat(3,1fr);gap:35px;list-style:none;padding:25px 0 0;margin:0}.process-list li{border-top:1px solid var(--line);padding-top:20px}.process-list span{font-family:Georgia,serif;font-style:italic;font-size:27px;color:var(--green)}.process-list h3{font-size:17px;font-weight:500}.process-list p{font-size:13px;color:var(--muted);max-width:290px}.contact{background:var(--ink);color:var(--paper);padding-top:55px;padding-bottom:55px;display:flex;justify-content:space-between;gap:40px;align-items:center}.contact .eyebrow{color:#c0cbb8}.contact p{color:#bfc7bb;font-size:13px}.contact-right{display:flex;flex-direction:column;align-items:flex-start;gap:12px}.contact-right .button{min-width:255px}.copy-email{border:0;background:none;color:#c0cbb8;font-size:12px;padding:9px 0;text-decoration:underline;text-underline-offset:4px}.contact-right small{font-size:10px;line-height:1.7;color:#afbba8}.contact-right p{margin:0;min-height:18px;font-size:11px}.site-footer{padding-top:28px;padding-bottom:35px;display:flex;justify-content:space-between;gap:20px;font-size:9px;color:var(--muted)}.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}.skip{position:fixed;top:-100px;left:15px;padding:12px;background:white;z-index:100}.skip:focus{top:10px}
@media(min-width:1600px){.hero{gap:75px}}@media(max-width:1100px){.wrap,.site-header{padding-left:30px;padding-right:30px}.hero{gap:25px}.hero h1{font-size:65px}.workbench{grid-template-columns:minmax(0,1fr) 315px}.guide-column{padding:19px}.hero-art figcaption{flex-direction:column}.detail-story{gap:40px}}
@media(max-width:800px){.site-header{height:78px}.wordmark b{font-size:14px}.wordmark small{font-size:8px}.mark{width:39px;height:38px}nav{gap:18px}nav>a:not(.nav-cta){display:none}.hero{padding-top:45px;grid-template-columns:1fr;gap:36px;padding-bottom:40px}.hero h1{font-size:65px}.hero-art{min-height:350px}.hero-art img{max-height:450px}.hero-art figcaption{flex-direction:row}.principles{gap:10px}.principles p{font-size:10px}.principles p:before{display:none}.section-intro{display:block}.section-intro>p{max-width:520px;margin-top:20px}.prototype-section{padding-top:55px}.workbench{grid-template-columns:1fr}.guide-column{border-left:0;border-top:1px solid var(--line);padding:26px}.guide-heading p{font-size:10px}.guide-notice{min-height:0}.voice-orb{margin-top:23px}.guide-mode button{font-size:12px}.guide-column{display:grid;grid-template-columns:1fr;}.conversation{max-height:230px;min-height:80px}.question-chips button{font-size:11px}.guide-footnote{font-size:10px}.question-form input{font-size:13px}.voice-options label,.voice-options button{font-size:11px}.call-controls>.button{font-size:12px}.guide-notice{font-size:11px}.guide-heading h3{font-size:17px}.detail-story{grid-template-columns:1fr;gap:30px;padding-top:65px;padding-bottom:60px}.detail-story>div>p:not(.eyebrow){max-width:500px}.process-list{gap:20px}.process-list p{font-size:12px}.contact{align-items:flex-start}.site-footer{flex-wrap:wrap}.case-disclosure{font-size:10px}#modelPanel,#renderPanel{height:600px}}
@media(max-width:480px){.wrap,.site-header{padding-left:20px;padding-right:20px}.site-header{gap:10px}.wordmark{gap:9px}.wordmark b{font-size:12px;letter-spacing:1.4px}.wordmark small{font-size:6px;letter-spacing:.6px}.nav-cta{font-size:10px}.nav-cta span{margin-left:4px}.hero h1{font-size:60px;letter-spacing:-3px}.lede{font-size:15px}.eyebrow{font-size:9px;letter-spacing:1.3px}.hero-art{min-height:290px}.hero-meta{font-size:9px;gap:11px}.hero-meta span+span:before{margin-right:11px}.hero-art figcaption{font-size:8px;flex-direction:column;gap:3px}.principles{grid-template-columns:1fr;padding-top:12px;padding-bottom:12px}.principles p{margin:4px 0}.principles p:before{display:inline}.section-intro h2,.detail-story h2,.process h2{font-size:33px}.model-toolbar{padding:0 12px}.tabs{gap:15px}.tabs button{font-size:10px}.model-toolbar>a{font-size:9px}#modelPanel,#renderPanel{height:570px}.load-model{padding:25px 15px}.load-model h3{font-size:22px}.guide-column{padding:22px 17px}.render-caption{padding:12px;font-size:9px}.render-options{padding-left:12px;gap:5px}.render-options button{font-size:10px;padding:8px 11px}.process-list{grid-template-columns:1fr;gap:20px}.process-list h3{margin:12px 0}.process-list p{max-width:100%}.contact{flex-direction:column;padding-top:38px;padding-bottom:38px}.contact h2{font-size:35px}.contact-right{width:100%}.contact-right .button{width:100%}.site-footer{font-size:8px;gap:12px}.site-footer>span:nth-child(2){display:none}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.voice-orb.speaking span{animation:none}}

/* Chinese acceptance version: readable CJK display and controls. */
:lang(zh-CN){font-family:Inter,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;}
:lang(zh-CN) h1{font-size:clamp(40px,5.2vw,70px);line-height:1.22;letter-spacing:-.035em;}
:lang(zh-CN) h2{line-height:1.35;letter-spacing:-.025em;}
:lang(zh-CN) .eyebrow,:lang(zh-CN) .tiny-tag,:lang(zh-CN) .message small{letter-spacing:.06em;}

.voice-auth{margin:12px 0;padding:12px;background:#f1f3ef;border:1px solid #dce1da}.voice-auth label{display:block;font-size:12px;margin-bottom:8px}.voice-auth>div{display:flex;gap:6px}.voice-auth input{min-width:0;flex:1;padding:9px;border:1px solid #cbd2c8;background:white}.voice-auth button,.camera-toolbar button{padding:9px 12px;background:#263b30;color:white;border:0;cursor:pointer}.voice-auth small{display:block;margin-top:8px;line-height:1.6;font-size:11px}.camera-panel{padding:12px 0;border-bottom:1px solid #e1e4dd}.camera-toolbar{display:flex;align-items:center;gap:8px}.camera-toolbar span{font-size:11px;line-height:1.5}.camera-panel p{font-size:11px;line-height:1.7;color:#687269}.camera-panel video{width:100%;max-height:230px;object-fit:contain;background:#1d2720;margin-top:10px;border-radius:5px}.camera-toolbar button:disabled{opacity:.4;cursor:not-allowed}

/* Portrait viewing recommendation; existing model and chat layout unchanged. */
.orientation-tip{display:none;position:fixed;z-index:90;top:12px;left:12px;right:12px;align-items:center;gap:10px;padding:12px 14px;background:#f4f6ef;border:1px solid #cdd8c7;color:#3e5142;border-radius:6px;box-shadow:0 6px 20px #20302612;}
.orientation-tip p{font-size:12px;line-height:1.5;margin:0;}
.orientation-tip strong{display:block;font-size:12px;margin-bottom:2px;}
.orientation-symbol{flex:0 0 auto;font-size:24px;line-height:1;}
.orientation-close{align-self:flex-start;flex:0 0 auto;border:0;background:transparent;color:#52634f;font-size:20px;line-height:1;padding:2px 4px;}
@media(max-width:800px) and (orientation:portrait){.orientation-tip{display:flex;}}