:root{--bg:#F8FAFC;--surface:#FFFFFF;--brand:#2563EB;--text:#1E293B;--muted:#64748B;--line:#E2E8F0;--radius:12px;color-scheme:light;font-family:system-ui,"Microsoft YaHei",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-size:15px;line-height:1.65}a{color:var(--brand);text-underline-offset:4px;overflow-wrap:anywhere}img{max-width:100%;height:auto}header,main,footer{max-width:1120px;margin:auto;padding:24px}header{display:flex;align-items:center;gap:28px;border-bottom:1px solid var(--line);min-height:80px}.brand{font-weight:850;font-size:21px;letter-spacing:.06em;text-decoration:none;color:var(--text);white-space:nowrap}.brand span{color:var(--brand)}nav{display:flex;gap:6px;flex:1;justify-content:center}nav a{color:var(--muted);text-decoration:none;font-size:14px;padding:10px 12px;border-radius:8px}nav a[aria-current],nav a:hover{color:var(--brand);background:#EFF6FF}.nav-download{font-size:13px;white-space:nowrap;text-decoration:none}.menu-toggle{display:none}h1,h2,h3{line-height:1.3;letter-spacing:-.025em}h1{font-size:clamp(30px,4.7vw,54px);margin:24px 0 18px}h2{font-size:25px;margin:0 0 14px}h3{font-size:19px;margin:8px 0 12px}p{margin:10px 0 18px}em{font-style:normal;color:var(--brand)}.muted,.lead,.hint{color:var(--muted)}.lead{font-size:17px;line-height:1.85;max-width:660px}.eyebrow{font-size:11px;letter-spacing:.15em;color:var(--brand);font-weight:750}.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;padding:54px 0 62px;align-items:center}.hero h1{font-size:clamp(38px,5vw,60px);line-height:1.2;margin-top:16px}.actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:22px 0}.button,button,.import-label{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:44px;padding:11px 18px;border:1px solid transparent;border-radius:9px;background:var(--brand);color:white;font:600 14px/1.4 system-ui,"Microsoft YaHei",sans-serif;cursor:pointer;text-decoration:none}.secondary,.back{background:var(--surface);border-color:var(--line);color:var(--text)}button:disabled{opacity:.5;cursor:not-allowed}.text-links{display:flex;flex-wrap:wrap;gap:20px;font-size:13px}.text-links a{color:var(--muted)}.hero-demo{background:white;border:1px solid var(--line);border-radius:16px;padding:28px}.demo-top{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:10px;color:var(--muted);letter-spacing:.08em}.badge{display:inline-block;padding:4px 10px;background:#EFF6FF;color:var(--brand);border-radius:6px;font-size:11px;letter-spacing:0}.light-chain{display:flex;justify-content:space-between;padding:48px 8px 38px;position:relative}.light-chain:before{content:"";position:absolute;height:2px;background:#DBEAFE;left:10px;right:10px;top:60px}.light-chain i{width:25px;height:25px;border-radius:7px;background:#2563EB;position:relative;border:4px solid #DBEAFE}.light-chain i:nth-child(2){background:#60A5FA}.light-chain i:nth-child(3){background:#93C5FD}.light-chain i:nth-child(n+4){background:#EFF6FF}.hero-demo h2{font-size:21px}.hero-demo p{font-size:12px;color:var(--muted);margin-bottom:0}.flow-line{display:flex;flex-wrap:wrap;gap:14px;font-size:12px;color:var(--muted);padding:14px 0;border-top:1px solid var(--line)}.section{padding:26px 0 30px;border-top:1px solid var(--line)}.section-title{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:20px}.section-title h2{margin:6px 0 0}.section-title>a{font-size:13px}.feature-row{display:grid;grid-template-columns:220px 1fr;gap:28px;align-items:center}.placeholder{display:grid;place-content:center;min-height:200px;background:#F1F5F9;border:1px dashed #CBD5E1;border-radius:12px;color:var(--muted);text-align:center;padding:24px}.placeholder.compact{min-height:145px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:18px}.card{background:white;border:1px solid var(--line);border-radius:var(--radius);padding:24px;min-width:0;margin:10px 0}.grid>.card{margin:0}.card p{color:var(--muted);font-size:14px}.card>a{font-weight:600}.number{font-size:12px;color:var(--brand);font-weight:700}.tool-link{text-decoration:none;color:var(--text)}.tool-link:hover{border-color:#93C5FD}.community-strip{border-top:1px solid var(--line);padding:30px 0;display:flex;align-items:center;justify-content:space-between;gap:20px}.community-strip p{color:var(--muted);margin:0}.notice{background:#EFF6FF;border-left:3px solid var(--brand);padding:14px 18px;font-size:14px;border-radius:0 8px 8px 0}.error{color:#B91C1C;overflow-wrap:anywhere}.empty{padding:35px 22px;border:1px dashed #CBD5E1;border-radius:12px;color:var(--muted);text-align:center;background:white}.hash{display:block;font-size:12px;overflow-wrap:anywhere;white-space:pre-wrap;background:var(--bg);padding:12px}.steps{list-style:none;padding:0;counter-reset:step}.steps li{counter-increment:step;display:flex;gap:18px;align-items:center;padding:16px 0;border-bottom:1px solid var(--line)}.steps li:before{content:counter(step,decimal-leading-zero);color:var(--brand);font-weight:700}details{padding:14px 0;border-bottom:1px solid var(--line)}summary{cursor:pointer;font-weight:600;min-height:32px}input,select,textarea{font:inherit;min-height:44px;border:1px solid #CBD5E1;border-radius:8px;padding:8px;background:white;color:var(--text);max-width:100%}input[type=checkbox],input[type=radio]{min-height:0;accent-color:var(--brand)}input[type=range]{accent-color:var(--brand);padding:0}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #93C5FD;outline-offset:3px}dialog{border:1px solid var(--line);border-radius:16px;padding:24px;max-width:min(540px,calc(100% - 28px));max-height:85dvh;overflow:auto;color:var(--text)}dialog::backdrop{background:rgba(15,23,42,.45)}dialog img{display:block}.filters{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0}.filters button{background:white;border-color:var(--line);color:var(--muted);font-size:13px}.filters button[aria-pressed=true]{background:var(--brand);color:white}.qr-thumb{max-width:180px;display:block}.copyable{width:100%;min-height:80px}.diagnostic-options{display:grid;gap:10px;margin:20px 0}.diagnostic-options button{text-align:left;justify-content:flex-start}.operation{background:var(--bg);padding:14px;border-radius:8px}.hidden,[hidden]{display:none!important}footer{margin-top:32px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}footer div{display:flex;gap:16px;flex-wrap:wrap}footer .brand{font-size:17px}footer p{margin:8px 0 16px}.media-card img{width:100%;max-height:260px;object-fit:cover;border-radius:8px}@media(max-width:760px){header{flex-wrap:wrap;padding:16px;gap:12px;min-height:64px}.menu-toggle{display:inline-flex;margin-left:auto}.nav-download{display:none}nav{display:none;flex-basis:100%;flex-direction:column;gap:4px}nav.open{display:flex}main,footer{padding:20px 16px}.hero{grid-template-columns:1fr;gap:28px;padding:25px 0 35px}.hero h1{font-size:42px}.hero-demo{padding:22px}.light-chain{padding-top:26px;padding-bottom:26px}.light-chain:before{top:38px}.section{padding:24px 0}.section-title{align-items:flex-start}.feature-row{grid-template-columns:1fr;gap:16px}.placeholder.compact{min-height:100px}.community-strip{display:block}.card{padding:20px}.lead{font-size:15px}.actions{gap:8px}.actions .button{flex:1 1 150px}h2{font-size:22px}.demo-top{flex-wrap:wrap}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

/* Public product photos and original, unmodified platform QR artwork. */
.image-button{display:block;padding:0;background:white;border:1px solid var(--line);overflow:hidden;width:100%;cursor:zoom-in}.image-button img{display:block;width:100%;height:auto;object-fit:contain}.product-stack{padding:6px;background:white;box-shadow:5px 5px 0 #E2E8F0;border-radius:12px}.product-gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:16px 0}.product-details{margin-bottom:18px}.social-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr));gap:18px}.social-card{text-align:center}.social-qr{max-width:224px;margin:18px auto;background:white;aspect-ratio:1}.social-qr img{height:100%;object-fit:contain}.social-card p{font-size:13px}.contact-note{font-weight:650;color:var(--text)!important}.image-viewer{width:min(900px,calc(100% - 24px));padding:16px}.image-viewer img{margin:auto;max-width:100%;height:auto}.viewer-close{position:sticky;top:0;float:right;z-index:1}.viewer-caption{font-weight:650;padding-right:72px}.image-viewer::backdrop{background:rgba(15,23,42,.7)}#social{scroll-margin-top:24px}#communities+h2{margin-top:32px}#largeQr{max-height:62dvh;object-fit:contain;margin:auto}

.product-dialog{width:min(800px,calc(100% - 24px));max-width:800px}.product-dialog h2{margin-top:18px}.product-details{margin-right:10px}
.tutorial-video{display:block;width:100%;max-height:65vh;background:#0F172A;border-radius:8px;margin-top:14px}