:root{--navy:#102a43;--ink:#1d2d3f;--muted:#6b7f91;--line:#dce4eb;--bg:#f5f8fb;--orange:#d97934;--white:#fff}*{box-sizing:border-box}html{min-width:320px;scroll-padding-top:92px}body{min-width:320px;margin:0;background:var(--bg);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;overflow-x:hidden;padding-top:76px}.topbar{position:fixed;inset:0 0 auto;z-index:100;min-height:76px;background:#102f4d;color:#fff;border-bottom:1px solid #3b5b74;box-shadow:0 8px 24px #0b1f3326}.topbar-inner{width:min(1180px,100%);min-height:76px;margin:auto;padding:0 32px;display:flex;align-items:center;justify-content:space-between}.brand{min-width:0;display:flex;align-items:center;gap:11px}.brand-mark{display:grid;place-items:center;flex:0 0 40px;width:40px;height:40px;border:1px solid #87afca;border-radius:12px;color:#fff;background:#173e5e;box-shadow:inset 0 0 0 3px #ffffff0d}.brand-mark svg{width:29px;height:29px}.brand-copy{width:177px;min-width:0;display:grid;gap:3px}.brand-copy strong{font-size:17px;font-weight:650;letter-spacing:.15px;line-height:1.15;white-space:nowrap}.brand-copy small{display:block;width:100%;font-family:Arial,sans-serif;font-size:7.5px;letter-spacing:0;color:#a9c1d2;line-height:1.15;white-space:nowrap;text-align:justify;text-align-last:justify}.brand-copy small::after{content:"";display:inline-block;width:100%}.topbar-note{flex:0 0 auto;font-size:13px;color:#d5e4ee;display:flex;align-items:center;gap:8px}.topbar-note i{width:7px;height:7px;border-radius:50%;background:#75d7a5;box-shadow:0 0 0 4px #75d7a520}.page-shell{max-width:1080px;margin:auto;padding:64px 24px 56px}.intro{text-align:center;margin-bottom:42px}.intro h1{font-size:30px;letter-spacing:1px;margin:0 0 14px;font-weight:650}.intro p{margin:0;color:var(--muted);font-size:15px}.workspace,.result-section{min-width:0;background:var(--white);border:1px solid var(--line);box-shadow:0 10px 25px #142b4210}.workspace{padding:28px 34px 24px}.section-title,.result-heading{display:flex;align-items:baseline;justify-content:space-between;gap:16px;font-weight:650;font-size:16px}.section-title small,.result-heading small{font-size:12px;font-weight:400;color:var(--muted)}.result-heading small{min-width:0;text-align:right}.upload-grid{display:grid;grid-template-columns:minmax(0,1fr) 58px minmax(0,1fr);align-items:center;gap:18px;margin:24px 0 22px}.upload-card{height:245px;min-width:0;border:1px dashed #aebdca;position:relative;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:10px;color:var(--muted);cursor:pointer;overflow:hidden;transition:.2s}.upload-card:hover,.upload-card.dragging{border-color:var(--orange);background:#fffaf6}.upload-card input{display:none}.upload-card strong{color:#33495e;font-size:15px}.upload-card span{font-size:13px}.upload-icon{border:1px solid #c6d1da;border-radius:50%;width:42px;height:42px;display:grid;place-items:center;font-size:24px;font-weight:300;color:#6e8495}.preview{display:none;position:absolute;inset:0;width:100%;height:100%;object-fit:contain;background:white;padding:12px}.has-image .preview{display:block}.has-image .upload-icon,.has-image strong,.has-image span{visibility:hidden}.compare-arrow{width:38px;height:38px;border-radius:50%;background:#edf2f6;color:#496277;display:grid;place-items:center;font-size:21px;margin:auto}.compare-button{display:flex;align-items:center;justify-content:center;gap:24px;width:238px;height:48px;border:0;background:var(--orange);color:#fff;font-family:inherit;font-size:15px;font-weight:600;letter-spacing:.3px;margin:0 auto;cursor:pointer;transition:.2s}.compare-button:hover{background:#c86827}.compare-button:disabled{opacity:.65;cursor:wait}.compare-button b{font-size:21px;font-weight:400}.form-message{margin:12px 0 0;text-align:center;color:#bd4d36;font-size:13px;min-height:18px}.result-section{margin-top:28px;padding:26px 34px}.result-panel{border-top:1px solid var(--line);margin-top:18px;padding-top:22px;display:grid;grid-template-columns:190px minmax(0,1fr);column-gap:42px}.score-box{border-right:1px solid var(--line);display:flex;flex-wrap:wrap;align-content:center;height:132px}.score-box span{width:100%;font-size:13px;color:var(--muted);margin-bottom:7px}.score-box strong{font-size:39px;letter-spacing:-1px;color:var(--navy);line-height:1}.score-box em{font-style:normal;color:#607b90;font-size:16px;align-self:end;margin:0 0 3px 4px}.metrics{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:15px 36px;align-content:center}.metric{min-width:0;font-size:13px;color:#536a7d}.metric>div{display:flex;gap:10px;align-items:center;margin-top:7px}.metric i{height:5px;display:block;background:#e8edf1;width:100%;overflow:hidden}.metric i b{display:block;background:#6d879d;height:100%}.metric em{font-style:normal;font-size:12px;min-width:40px;text-align:right}.conclusion{grid-column:1/-1;margin-top:22px;padding:14px 16px;background:#f7f9fb;font-size:13px;line-height:1.8;color:#5f7180;overflow-wrap:anywhere}.conclusion span{font-weight:600;color:#375064}.conclusion p{margin:3px 0 0}footer{border-top:1px solid var(--line);color:#708292;text-align:center;font-size:13px;padding:23px 16px;background:white}footer b{font-weight:400;color:#b7c2cb;margin:0 9px}@media(max-width:680px){html{scroll-padding-top:70px}body{padding-top:64px}.topbar,.topbar-inner{min-height:64px}.topbar-inner{padding:0 18px}.brand{gap:9px}.brand-mark{flex-basis:35px;width:35px;height:35px;border-radius:10px}.brand-mark svg{width:25px;height:25px}.brand-copy{width:154px}.brand-copy strong{font-size:14px;letter-spacing:0}.brand-copy small{font-size:6.4px}.topbar-note{display:none}.page-shell{padding:40px 16px}.intro h1{font-size:24px}.intro p{line-height:1.7}.workspace,.result-section{padding:22px 18px}.section-title{display:block}.section-title small{display:block;margin-top:7px}.upload-grid{grid-template-columns:1fr;gap:12px}.compare-arrow{transform:rotate(90deg)}.upload-card{height:205px}.result-panel{grid-template-columns:1fr;gap:20px}.score-box{height:auto;border:0;padding-bottom:19px;border-bottom:1px solid var(--line)}.metrics{grid-template-columns:1fr}.conclusion{margin-top:2px;padding:13px 14px}footer{line-height:1.8;padding:18px 26px}footer b{margin:0 3px}}
/* Keep the copyright strip at the bottom when the page content is short. */
body{min-height:100vh;display:flex;flex-direction:column}
.page-shell{width:100%;flex:1 0 auto}
footer{margin-top:auto;flex:0 0 auto}
.recognized-text{grid-column:1/-1;margin-top:12px;padding:12px 16px;border:1px solid var(--line);background:#fff;font-size:13px;line-height:1.7;color:#50677a;overflow-wrap:anywhere}
.recognized-text p{margin:0}.recognized-text p+p{margin-top:7px}.recognized-text b{color:#375064}
#engine-text{display:none}
.seal-gallery{grid-column:1/-1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:14px}.seal-viewer{border:1px solid var(--line);padding:12px;background:#fff;min-width:0}.seal-viewer-head{display:flex;justify-content:space-between;align-items:center;color:#375064;font-size:13px;margin-bottom:9px}.seal-viewer button{border:1px solid var(--line);background:#fff;color:#375064;font:inherit;padding:3px 7px;cursor:pointer;margin-left:4px}.seal-canvas{height:250px;background:#f8fafc;overflow:hidden;display:grid;place-items:center;cursor:grab;touch-action:none}.seal-canvas:active{cursor:grabbing}.seal-canvas img{max-width:100%;max-height:100%;object-fit:contain;transform-origin:center;transition:transform .06s linear;user-select:none;filter:contrast(1.06)}.seal-viewer small{display:block;color:var(--muted);font-size:12px;margin-top:8px}@media(max-width:680px){.seal-gallery{grid-template-columns:1fr}.seal-canvas{height:210px}}
.report-actions{grid-column:1/-1;display:flex;justify-content:flex-end;margin-top:14px}.result-heading .report-button{margin-left:auto}.report-button{border:0;background:#102f4d;color:#fff;font-family:inherit;font-size:14px;font-weight:600;padding:10px 18px;cursor:pointer;transition:.2s;white-space:nowrap}.report-button:hover{background:#17446c}.report-button:disabled{opacity:.65;cursor:wait}@media(max-width:680px){.result-heading{align-items:center}.result-heading .report-button{padding:8px 12px;font-size:12px}.report-actions{justify-content:stretch}.report-button{width:auto}}
.seal-canvas img{max-width:none;max-height:none}
.seal-canvas{position:relative;display:block}.seal-canvas img{position:absolute;left:50%;top:50%;transform-origin:center center}
.metric-label{display:inline-flex;align-items:center;gap:6px;position:relative;max-width:100%}.metric-help{width:16px;height:16px;border:1px solid #b9c8d4;border-radius:50%;background:#fff;color:#6d879d;font-size:11px;line-height:14px;text-align:center;padding:0;cursor:help;font-family:Arial,sans-serif;flex:0 0 auto}.metric-help::after{content:attr(data-tip);position:absolute;left:0;bottom:calc(100% + 8px);z-index:30;width:min(360px,calc(100vw - 56px));padding:10px 12px;border:1px solid #d7e1e9;background:#fff;color:#375064;box-shadow:0 8px 22px #102a431f;border-radius:4px;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;font-size:12px;line-height:1.65;text-align:left;white-space:normal;opacity:0;visibility:hidden;transform:translateY(4px);transition:.16s;pointer-events:none}.metric-help::before{content:"";position:absolute;left:5px;bottom:calc(100% + 3px);z-index:31;border:6px solid transparent;border-top-color:#fff;opacity:0;visibility:hidden;transition:.16s}.metric-help:hover::after,.metric-help:focus-visible::after,.metric-help:hover::before,.metric-help:focus-visible::before{opacity:1;visibility:visible;transform:translateY(0)}@media(max-width:680px){.metric-help::after{left:auto;right:0;width:min(300px,calc(100vw - 48px))}}
/* Password Modal */
.password-modal[hidden]{display:none!important}.password-modal{position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center}.password-modal-overlay{position:absolute;inset:0;background:#00000066}.password-modal-content{position:relative;background:#fff;border-radius:12px;padding:32px 36px 28px;width:min(380px,90vw);box-shadow:0 20px 50px #00000033;text-align:center}.password-modal-content h3{margin:0 0 12px;font-size:18px;color:#102f4d}.password-modal-content>p{margin:0 0 18px;color:#6b7f91;font-size:14px}.password-modal-content input[type=password]{width:100%;height:44px;border:1px solid #dce4eb;border-radius:8px;padding:0 14px;font-size:15px;font-family:inherit;text-align:center;letter-spacing:2px;outline:none;transition:.2s}.password-modal-content input[type=password]:focus{border-color:#d97934;box-shadow:0 0 0 3px #d9793420}.password-error{margin:10px 0 0;color:#bd4d36;font-size:13px;min-height:18px}.password-modal-actions{display:flex;gap:12px;justify-content:center;margin-top:20px}.password-modal-actions button{height:40px;padding:0 28px;border:0;border-radius:8px;font-family:inherit;font-size:14px;font-weight:600;cursor:pointer;transition:.2s}.btn-secondary{background:#edf2f6;color:#496277}.btn-secondary:hover{background:#dce4eb}.btn-primary{background:#d97934;color:#fff}.btn-primary:hover{background:#c86827}