@charset "UTF-8";
:root{color-scheme:dark;--bg:#0c1113;--panel:#11191e;--surface:#182127;--border:#253137;--text:#e9efed;--muted:#8d9c9f;--mint:#80dfbd;--mint-ink:#0d3125;--track:#202b30;--stage:#173b31;--stage-ink:#b9d6c9;--warning:#e9bb75;--shadow:0 10px 35px #0000000d}
:root[data-theme=light]{color-scheme:light;--bg:#f5f7f3;--panel:#fff;--surface:#eef2ef;--border:#dce4dd;--text:#22362d;--muted:#6b7c73;--mint:#217e5f;--mint-ink:#fff;--track:#e8eeea;--stage:#dfece1;--stage-ink:#4e715c;--warning:#986017;--shadow:0 8px 28px #263d2805}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--bg);color:var(--text);font-family:"Segoe UI","Microsoft YaHei",system-ui,sans-serif;font-size:14px;line-height:1.65;-webkit-font-smoothing:antialiased}button,input,select{font:inherit}button,select,summary{cursor:pointer}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{transition:background .2s,opacity .2s,transform .2s}button:active:not(:disabled){transform:translateY(1px)}button:disabled{cursor:not-allowed;opacity:.4}a{color:inherit;text-decoration:none}a:hover{color:var(--mint)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--mint);outline-offset:4px}h1,h2,h3,p{margin:0}svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.svg-library{position:absolute;width:0;height:0;overflow:hidden}[hidden]{display:none!important}.site-header{max-width:1360px;margin:auto;padding:25px 48px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}.brand{display:flex;align-items:center;gap:12px;font-size:22px;font-weight:650;letter-spacing:2px;line-height:1.3}.brand-sub{display:block;font:9px ui-monospace,Consolas,monospace;letter-spacing:2px;color:var(--muted);margin-top:5px}.local-tag{font:10px ui-monospace,Consolas,monospace;color:var(--muted);letter-spacing:.7px;border-left:1px solid var(--border);padding-left:20px;margin-left:12px}.site-header nav{display:flex;align-items:center;gap:29px;font-size:12px;color:var(--muted)}.nav-active{color:var(--text)}.nav-active i,.dot{display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--mint)}.nav-active i{margin-left:5px;vertical-align:middle}.icon-button{width:34px;height:34px;background:none;color:var(--muted);border:1px solid var(--border);border-radius:8px;display:grid;place-items:center}.icon-button:hover{color:var(--mint);background:var(--surface)}main{max-width:1264px;margin:auto;padding:0 32px}.hero{padding:50px 0 33px;position:relative}.eyebrow{display:flex;align-items:center;gap:14px;font:10px ui-monospace,Consolas,monospace;letter-spacing:1.5px;color:var(--muted)}.pill{color:var(--mint);font:11px "Microsoft YaHei",sans-serif;letter-spacing:.5px;border:1px solid var(--border);background:var(--panel);padding:4px 8px;border-radius:4px}h1{font-size:clamp(28px,3.35vw,43px);letter-spacing:-1.5px;font-weight:650;line-height:1.4;margin:20px 0 12px}h1 span{color:var(--mint)}.hero>p{color:var(--muted);font-size:14px;letter-spacing:.3px}.hero-meta{display:flex;gap:23px;color:var(--muted);font-size:11px;margin-top:24px}.hero-meta>span{display:flex;align-items:center;gap:7px}.hero-meta>span+span:before{content:"";width:1px;height:11px;background:var(--border);margin-right:2px}.hero-mark{position:absolute;right:12px;top:67px;color:var(--border);text-align:center;transform:rotate(-9deg);user-select:none}.hero-mark span{font:11px ui-monospace,monospace;letter-spacing:3px;color:var(--muted)}.hero-mark div{font-size:68px;line-height:.9;letter-spacing:12px;margin-top:15px}.notice{display:flex;justify-content:space-between;align-items:center;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:14px 18px;font-size:12px;color:var(--muted);box-shadow:var(--shadow)}.notice>span{display:flex;align-items:center;gap:10px}.notice svg,.notice a{color:var(--mint)}.notice svg{width:16px;height:16px}.connection{font-size:11px;color:var(--muted);min-height:31px;padding:6px 3px;display:flex;align-items:center;gap:7px}.connection:before{content:"";display:inline-block;width:4px;height:4px;background:var(--muted);border-radius:50%}.connection.ready:before{background:var(--mint)}.connection.error{color:var(--warning)}.workspace{display:grid;grid-template-columns:minmax(0,1.32fr) minmax(0,1fr);gap:22px;align-items:stretch}.panel{background:var(--panel);border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow)}.input-panel{padding:20px}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:17px}.tabs{display:flex;padding:4px;gap:3px;border-radius:9px;background:var(--surface)}.tabs button{border:0;border-radius:6px;background:none;color:var(--muted);padding:8px 13px;display:flex;align-items:center;gap:8px;font-size:12px}.tabs svg{width:15px;height:15px}.tabs [aria-selected=true]{background:var(--panel);color:var(--mint);box-shadow:0 1px 5px #00000010}.micro{font:10px ui-monospace,Consolas,monospace;color:var(--muted);letter-spacing:1.2px}.viewport{position:relative;width:100%;aspect-ratio:4/3;overflow:hidden;border-radius:10px;background-color:var(--stage);background-image:linear-gradient(#9bb5a606 1px,transparent 1px),linear-gradient(90deg,#9bb5a606 1px,transparent 1px),radial-gradient(ellipse at 50% 42%,#7ab99411,transparent 70%);background-size:40px 40px,40px 40px,auto;color:var(--stage-ink);display:grid;place-items:center;isolation:isolate}.viewport.dragging{outline:2px dashed var(--mint);outline-offset:-5px;background-color:var(--surface)}#preview{width:100%;height:100%;object-fit:contain;background:#0a100e}.placeholder{display:flex;flex-direction:column;align-items:center;text-align:center;padding:36px 18px;pointer-events:none}.scan-face{width:132px;height:132px;opacity:.7;margin-bottom:12px;stroke:none}.placeholder h2{font-size:17px;font-weight:500;letter-spacing:1px}.placeholder p{font-size:11px;opacity:.7;margin-top:10px}.stage-label{position:absolute;z-index:2;left:17px;top:17px;padding:5px 10px;border:1px solid #adc9bb26;background:#10271fc9;color:#c0d8cb;border-radius:30px;font-size:10px;display:flex;align-items:center;gap:6px;max-width:calc(100% - 34px);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.stage-footer{position:absolute;z-index:2;bottom:14px;left:18px;right:18px;display:flex;align-items:center;justify-content:space-between;font-size:10px;color:#c0d8cb;text-shadow:0 1px 5px #000}.stage-footer>span:first-child{padding:2px 7px;border-radius:4px;background:#10271fa6;max-width:90%;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.viewfinder{font-size:26px;line-height:1}.busy-cover{position:absolute;inset:0;background:#0a1c15b8;z-index:4;display:flex;align-items:center;justify-content:center;gap:10px;color:#d9eee5;font-size:13px}.spinner{height:17px;width:17px;border:2px solid #ffffff30;border-top-color:var(--mint);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.action-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:17px}.primary,.secondary{border:1px solid transparent;border-radius:8px;padding:10px 16px;font-size:12px;font-weight:600;display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:43px}.primary{background:var(--mint);color:var(--mint-ink);box-shadow:0 4px 18px #72d4aa0a}.primary:hover:not(:disabled){filter:brightness(1.07)}.secondary{background:var(--surface);border-color:var(--border);color:var(--text)}.secondary span{color:var(--muted);margin-left:3px}.secondary:hover:not(:disabled){border-color:var(--muted)}.text-button,.inline-button{border:0;background:none;color:var(--mint);font-size:11px;padding:4px}.text-button:hover:not(:disabled),.inline-button:hover{text-decoration:underline}.action-row .text-button{margin-left:auto}.input-help{font-size:11px;color:var(--muted);margin-top:12px;line-height:1.8}.status-line{font-size:11px;color:var(--mint);min-height:36px;margin-top:9px;line-height:1.8}.status-line.error{color:var(--warning)}.camera-options{display:flex;align-items:center;gap:9px;margin-top:13px;color:var(--muted);font-size:11px}.camera-options select{width:auto;font-size:11px;padding:6px 24px 6px 8px}.camera-options>span{margin-left:auto}.camera-options b{font-weight:500;color:var(--mint);font-family:ui-monospace,monospace}.metrics{display:grid;grid-template-columns:1fr 1fr 1fr;border-top:1px solid var(--border);padding-top:16px;margin-top:3px}.metrics>div{padding:0 15px;border-left:1px solid var(--border)}.metrics>div:first-child{padding-left:0;border:0}.metrics span{display:block;color:var(--muted);font-size:10px;margin-bottom:3px}.metrics strong{font:21px ui-monospace,Consolas,monospace;font-weight:400}.metrics small{font:10px "Segoe UI",sans-serif;color:var(--muted);margin-left:3px}.result-panel{padding:24px 25px;display:flex;flex-direction:column}.result-heading{display:flex;justify-content:space-between;align-items:center}.result-heading h2{font-size:17px;font-weight:600}.badge{font-size:10px;color:var(--muted);background:var(--surface);padding:3px 8px;border-radius:20px;white-space:nowrap}.badge.success{color:var(--mint)}.badge.uncertain{color:var(--warning)}.current-result{display:flex;align-items:center;gap:14px;margin:30px 0 28px;min-height:78px}.expression-icon{width:62px;height:68px;flex-shrink:0;display:grid;place-items:center;background:var(--surface);border-radius:20px;color:var(--mint)}.expression-icon svg{height:43px;width:43px;stroke-width:1.6}.result-copy{flex:1;min-width:0}.result-copy .micro{font-size:9px;letter-spacing:1px}.result-copy h3{font-size:21px;letter-spacing:-.5px;line-height:1.6;font-weight:600;white-space:nowrap}.result-copy p{font-size:10px;color:var(--muted);line-height:1.7}.confidence{text-align:right;min-width:64px}.confidence strong{font:26px ui-monospace,Consolas,monospace;color:var(--mint);letter-spacing:-1.5px;display:block}.confidence span{font-size:9px;color:var(--muted);white-space:nowrap}.distribution-heading{border-top:1px solid var(--border);padding-top:22px;display:flex;justify-content:space-between;align-items:center;margin-bottom:17px}.distribution-heading h3{font-size:13px;font-weight:500}.distribution-heading span{font-size:10px;color:var(--muted)}.bars{display:flex;flex-direction:column;gap:15px;margin-bottom:25px}.bar-row{display:grid;grid-template-columns:52px 1fr 44px;gap:12px;align-items:center;font-size:11px}.bar-label{color:var(--muted);display:flex;align-items:center;gap:7px;white-space:nowrap}.bar-dot{width:5px;height:5px;border-radius:50%;background:var(--bar-color);flex-shrink:0}.bar-track{height:5px;border-radius:9px;background:var(--track);overflow:hidden}.bar-fill{height:100%;width:0%;background:var(--bar-color);border-radius:9px;transition:width .25s ease;opacity:.85}.bar-value{font:10px ui-monospace,Consolas,monospace;text-align:right;color:var(--muted)}.bar-row.leading .bar-label,.bar-row.leading .bar-value{color:var(--text)}.bar-row.leading .bar-fill{opacity:1}.face-select-row{display:flex;gap:8px;align-items:center;margin:-9px 0 12px;color:var(--muted);font-size:11px}.face-select-row select{width:auto;max-width:140px;padding:4px 8px;font-size:11px}.face-select-row>span{margin-left:auto;font-size:10px}.result-bottom{border-top:1px solid var(--border);padding-top:15px;display:flex;align-items:center;justify-content:space-between;font-size:10px;color:var(--muted)}.result-bottom>span{display:flex;gap:6px;align-items:center}.muted-dot{background:var(--muted)}.result-note{font-size:10px;color:var(--muted);line-height:1.9;margin-top:auto;padding-top:24px}.section-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:19px}.section-heading h2{font-size:19px;font-weight:500;letter-spacing:.5px;margin-top:8px}.section-heading .eyebrow{font-size:9px}.history-section{margin:34px 0}.history{border:1px dashed var(--border);border-radius:12px;padding:19px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;min-height:110px}.history-empty{grid-column:1/-1;display:flex;align-items:center;justify-content:center;gap:19px;color:var(--muted);padding:7px}.history-empty>span{font-size:32px;color:var(--mint);opacity:.6}.history-empty p{font-size:12px}.history-empty small{display:block;font-size:10px;margin-top:5px}.history-card{border:1px solid var(--border);background:var(--panel);border-radius:9px;padding:11px 13px;min-width:0}.history-card>div{display:flex;align-items:center;justify-content:space-between;gap:10px}.history-card strong{font-size:13px;font-weight:500}.history-card b{font:13px ui-monospace,monospace;color:var(--mint)}.history-card p{font-size:9px;color:var(--muted);margin-top:5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.settings{scroll-margin-top:24px;margin-bottom:45px}.settings>summary{padding:20px 23px;list-style:none;display:flex;align-items:center;justify-content:space-between}.settings>summary::-webkit-details-marker,.faq summary::-webkit-details-marker{display:none}.settings>summary>span{display:flex;align-items:center;gap:10px}.settings>summary svg{color:var(--muted);width:17px;height:17px}.summary-right{font-size:11px;color:var(--muted)}.chevron{font-size:18px;transition:transform .2s}.settings[open] .chevron{transform:rotate(180deg)}.settings-body{border-top:1px solid var(--border);padding:24px;display:grid;grid-template-columns:1fr 1fr;gap:25px 36px}.setting>label,.label-row>label{font-size:12px;display:block;margin-bottom:9px}.setting p{font-size:10px;color:var(--muted);margin-top:8px;line-height:1.8}.label-row{display:flex;justify-content:space-between;align-items:center}output{font:12px ui-monospace,monospace;color:var(--mint)}select{width:100%;background:var(--surface);border:1px solid var(--border);border-radius:7px;color:var(--text);padding:10px 12px;max-width:100%;font-size:12px}input[type=range]{width:100%;accent-color:var(--mint);height:35px;cursor:pointer}input[type=checkbox]{accent-color:var(--mint);width:15px;height:15px;vertical-align:middle}.setting .check-label{display:flex;align-items:center;gap:9px;margin-top:26px}.inline-button{font-size:10px;padding:0;margin-left:3px}.help-section{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;margin:0 0 54px;padding-top:7px}.help-intro h2{font-size:29px;font-weight:500;line-height:1.6;letter-spacing:.5px;margin:15px 0}.help-intro p{font-size:12px;color:var(--muted);line-height:2}.tip-chips{display:flex;gap:12px;margin-top:22px;font-size:10px;color:var(--muted)}.tip-chips span{background:var(--panel);border:1px solid var(--border);border-radius:5px;padding:4px 7px}.faq details{border-bottom:1px solid var(--border)}.faq summary{list-style:none;font-size:12px;padding:18px 0;display:flex;align-items:center;justify-content:space-between;gap:15px}.faq summary:after{content:"+";font:16px ui-monospace,monospace;color:var(--muted)}.faq details[open] summary:after{content:"−"}.faq p{font-size:11px;color:var(--muted);line-height:2;padding-bottom:18px}.faq details:first-child summary{padding-top:0}.error-banner{padding:15px;border:1px solid var(--warning);color:var(--warning)}footer{max-width:1200px;margin:0 auto;border-top:1px solid var(--border);padding:24px 0 30px;display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:10px}footer>span:first-child{font-size:17px;color:var(--text);letter-spacing:2px}.footer-sub{font-size:10px;color:var(--muted);margin-left:14px;letter-spacing:0}footer>span:nth-child(2){font-family:ui-monospace,Consolas,monospace;letter-spacing:1px}
/* Keep the live video independent of inference and align its overlay canvas. */
#preview,#video{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}
#video{z-index:0;background:#0a100e}
#preview{z-index:1}
#preview.live-overlay{background:transparent;pointer-events:none}
.camera-options{flex-wrap:wrap}
.camera-rates{display:flex;flex-wrap:wrap;gap:5px 12px;justify-content:flex-end}
@media(min-width:1450px){.hero{padding-top:60px}}
@media(max-width:1050px){.site-header{padding:22px 32px}.local-tag{display:none}.workspace{gap:16px;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr)}.input-panel{padding:16px}.result-panel{padding:20px}.current-result{gap:10px}.expression-icon{width:47px;height:57px;border-radius:16px}.expression-icon svg{width:34px;height:34px}.result-copy h3{font-size:18px}.confidence strong{font-size:23px}.confidence{min-width:52px}.hero-mark{right:0}.bars{gap:14px}.action-row{gap:8px}.primary,.secondary{padding:10px 12px}.action-row .text-button{margin-left:0}.hero .eyebrow{font-size:9px}.help-section{gap:35px}footer{margin:0 32px}}
@media(max-width:800px){.workspace{grid-template-columns:1fr}.hero-mark{display:none}.hero{padding-top:34px}.hero-meta{margin-top:20px}.result-panel{padding:24px}.current-result{margin:24px 0;gap:16px}.expression-icon{width:62px;height:65px}.expression-icon svg{width:43px;height:43px}.result-copy h3{font-size:22px}.confidence strong{font-size:28px}.result-note{padding-top:18px}.bars{gap:16px}.history{grid-template-columns:repeat(2,minmax(0,1fr))}.help-section{gap:30px;grid-template-columns:1fr 1.2fr}.site-header nav{gap:20px}.viewport{max-height:520px;aspect-ratio:4/3}.metrics{padding:17px 0 2px}.metrics>div:not(:first-child){padding-left:22px}}
@media(max-width:540px){main{padding:0 18px}.site-header{padding:18px}.site-header nav{gap:14px}.site-header nav>a:not(.nav-active){display:none}.brand{font-size:20px;gap:9px}.brand img{width:35px;height:35px}.brand-sub{font-size:8px;letter-spacing:1.4px}.hero{padding:30px 0 24px}.eyebrow{gap:10px;letter-spacing:1px}.hero>.eyebrow>span:last-child{font-size:8px;letter-spacing:.6px}h1{font-size:29px;margin:17px 0 12px;letter-spacing:-1px}.hero>p{font-size:12px;max-width:310px;line-height:1.9}.hero-meta{font-size:10px;gap:12px;flex-wrap:wrap}.hero-meta>span+span:before{margin-right:0}.notice{font-size:10px;padding:12px;gap:8px}.notice a{display:none}.notice>span{gap:7px}.connection{font-size:10px}.input-panel{padding:13px}.panel-heading{margin-bottom:13px}.tabs button{padding:7px 10px;font-size:11px;gap:6px}.micro{font-size:8px}.stage-label{left:12px;top:12px;font-size:9px}.stage-footer{left:11px;right:11px;bottom:10px;font-size:9px}.scan-face{height:99px;width:99px;margin-bottom:8px}.placeholder h2{font-size:15px}.placeholder p{font-size:10px}.placeholder{padding:37px 12px}.action-row{margin-top:13px}.primary,.secondary{font-size:11px;min-height:40px;padding:9px 12px}.input-help{font-size:10px}.action-row .text-button{font-size:10px}.metrics strong{font-size:20px}.result-panel{padding:20px}.result-copy h3{font-size:20px}.result-copy p{font-size:9px}.current-result{gap:11px}.expression-icon{width:50px;height:58px}.confidence strong{font-size:25px}.bar-row{gap:11px}.history-section{margin:27px 0}.history{padding:12px;gap:9px}.history-empty{padding:8px 0;gap:12px}.history-empty p{font-size:11px}.history-empty small{font-size:9px;max-width:235px}.history-card{padding:10px}.history-card p{font-size:8px}.settings>summary{padding:17px}.summary-right{font-size:10px}.settings-body{grid-template-columns:1fr;padding:20px;gap:22px}.setting .check-label{margin-top:0}.settings{margin-bottom:35px}.help-section{grid-template-columns:1fr;gap:29px}.help-intro h2{font-size:27px;line-height:1.5}.help-intro h2 br{display:none}.tip-chips{margin-top:18px}.help-section{margin-bottom:30px}footer{margin:0 18px;padding:22px 0;gap:15px;flex-wrap:wrap}footer>span:nth-child(2){display:none}.section-heading h2{font-size:18px}.result-note{font-size:10px}.face-select-row>span{display:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}

.model-switch{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px;position:relative;z-index:1}.model-switch small{font-size:10px;opacity:.7;margin-left:3px}.model-switch .selected{border-color:var(--mint);color:var(--mint);background:var(--surface)}.hero>p a{color:var(--mint);display:inline-block;margin-top:8px;font-size:12px}