:root{--bg:#fbf8f5;--panel:#fff;--ink:#1f1d2b;--muted:#6b6878;--line:#e7e2dc;--accent:#d6336c;--accent-ink:#fff;--radius:14px;--shadow:0 1px 2px rgba(0,0,0,.04),0 4px 16px rgba(0,0,0,.05)}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--accent)}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:10}
.site-header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 20px;background:#fff;border-bottom:1px solid var(--line);flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.15rem;color:var(--ink);text-decoration:none}
.site-header nav{display:flex;gap:16px;flex-wrap:wrap}
.site-header nav a{color:var(--muted);text-decoration:none;font-size:.95rem}
.site-header nav a:hover{color:var(--accent)}
main{max-width:1240px;margin:0 auto;padding:0 16px}
.hero{padding:24px 4px 8px}
.hero h1{font-size:clamp(1.5rem,4vw,2.3rem);line-height:1.2;margin:0 0 8px}
.lead{color:var(--muted);max-width:780px;margin:0;font-size:1.05rem}
.tool{display:grid;grid-template-columns:minmax(300px,380px) 1fr;gap:16px;margin:16px 0 32px;align-items:start}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}
.output{position:sticky;top:12px;min-width:0}
.step+.step{border-top:1px solid var(--line);margin-top:14px;padding-top:14px}
.step h2,.preview-head h2{font-size:1.05rem;margin:0 0 10px;display:flex;align-items:center;gap:8px}
.num{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--accent);color:#fff;font-size:.8rem}
.drop{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;border:2px dashed #e3b7c6;border-radius:12px;padding:22px 12px;text-align:center;cursor:pointer;background:#fff7fa;transition:.15s}
.drop:hover,.drop.over{border-color:var(--accent);background:#ffeef4}
.drop input{position:absolute;width:1px;height:1px;opacity:0}
.drop:focus-within{outline:3px solid #f7c3d4}
.drop-main{font-weight:700}.drop-sub{font-size:.85rem;color:var(--muted)}
.samples{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-top:10px;font-size:.9rem;color:var(--muted)}
.chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 12px;font:inherit;font-size:.9rem;cursor:pointer;min-height:36px}
.chip:hover{border-color:var(--accent);color:var(--accent)}
.field{display:flex;flex-direction:column;gap:4px;margin-bottom:10px;min-width:0}
.field label{font-size:.88rem;font-weight:600}
.row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.row .check{grid-column:1/-1}
select,input[type=number],input[type=search]{font:inherit;padding:9px 10px;border:1px solid #d9d3cc;border-radius:10px;background:#fff;min-height:42px;width:100%;color:var(--ink)}
input[type=range]{width:100%;accent-color:var(--accent);min-height:28px}
.check{display:flex;align-items:flex-start;gap:8px;margin:8px 0;font-size:.95rem;line-height:1.35}
.check input{width:20px;height:20px;accent-color:var(--accent);flex:none;margin:0}
.check .link{padding:0;margin-left:4px;white-space:nowrap}
.check.small{font-size:.88rem;margin:0}
.hint{color:var(--muted);font-size:.85rem;margin:4px 0 0}
.link{background:none;border:0;color:var(--accent);font:inherit;text-decoration:underline;cursor:pointer;padding:4px 0}
.adjust{margin-top:8px}.adjust summary{cursor:pointer;font-weight:600;font-size:.92rem;padding:6px 0}
.preview-head{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}
.view-opts{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.view-opts select{min-height:36px;padding:5px 8px;width:auto}
.preview-wrap{position:relative;overflow:auto;max-height:70vh;min-height:240px;border-radius:10px;background:repeating-conic-gradient(#f3efea 0 25%,#fff 0 50%) 0 0/16px 16px;border:1px solid var(--line);display:grid;place-items:center;touch-action:pan-x pan-y}
.preview-wrap canvas{display:block;margin:auto;image-rendering:pixelated;cursor:crosshair}
.empty{color:var(--muted);padding:40px 20px;text-align:center}
.zoom-row{display:flex;align-items:center;gap:10px;margin-top:8px;font-size:.88rem}
.stats{font-size:.92rem;color:var(--muted);margin:8px 0;min-height:1.4em}
.stats.error{color:#c92a2a}
.exports{display:flex;gap:8px;flex-wrap:wrap}
.btn{font:inherit;font-weight:600;border:1px solid #d9d3cc;background:#fff;border-radius:10px;padding:10px 16px;cursor:pointer;min-height:44px;color:var(--ink)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn:not(:disabled):hover{filter:brightness(.96)}
.pdf-opts{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-top:8px;font-size:.88rem;color:var(--muted)}
.pdf-opts select{width:auto;min-height:34px;padding:4px 8px}
.legend-wrap{margin-top:14px}
.legend-wrap h3{font-size:1rem;margin:0 0 6px}
.legend{width:100%;border-collapse:collapse;font-size:.9rem}
.legend th{text-align:left;font-size:.78rem;color:var(--muted);font-weight:600;border-bottom:1px solid var(--line);padding:4px 6px}
.legend td{padding:5px 6px;border-bottom:1px solid #f1ede8}
.legend .n{text-align:right;font-variant-numeric:tabular-nums}
.legend tbody tr{cursor:pointer}.legend tbody tr:hover{background:#fff4f7}
.legend tr.active{background:#ffe3ec}
.sw{display:inline-block;width:18px;height:18px;border-radius:50%;vertical-align:middle;margin-right:6px;border:1px solid rgba(0,0,0,.15)}
.sym{font-family:ui-monospace,Menlo,monospace;font-weight:700}
dialog{border:0;border-radius:var(--radius);padding:0;width:min(640px,96vw);max-height:90vh;box-shadow:0 10px 40px rgba(0,0,0,.25)}
dialog::backdrop{background:rgba(20,10,20,.4)}
.owned-form{padding:16px;display:flex;flex-direction:column;max-height:90vh}
.dialog-head{display:flex;justify-content:space-between;align-items:center}
.dialog-head h2{margin:0;font-size:1.1rem}
.owned-tools{display:flex;gap:6px;margin:10px 0}
.owned-list{overflow:auto;display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:4px;padding:2px}
.owned-list label{display:flex;align-items:center;gap:6px;font-size:.88rem;padding:6px;border-radius:8px;border:1px solid #f1ede8;cursor:pointer}
.owned-list label:hover{background:#fff7fa}
.owned-list input{width:18px;height:18px;accent-color:var(--accent)}
.content{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin:0 0 20px}
.content h2{margin-top:0;font-size:1.3rem}
.steps li{margin-bottom:8px}
.faq details{border-bottom:1px solid var(--line);padding:10px 0}
.faq summary{cursor:pointer;font-weight:600}
.faq p{margin:8px 0 0;color:#3d3a48}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px}
.card{display:flex;flex-direction:column;gap:2px;padding:12px;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--ink);background:#fffdfb}
.card:hover{border-color:var(--accent)}
.card span{font-size:.85rem;color:var(--muted)}
.tip{background:#fff7e6;border-left:4px solid #f59f00;padding:10px 12px;border-radius:8px}
.btn-link{font-weight:700}
.prose{max-width:820px}
.site-footer{background:#fff;border-top:1px solid var(--line);margin-top:24px;padding:24px 20px;font-size:.9rem;color:var(--muted)}
.footer-cols{max-width:1240px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.footer-cols ul{list-style:none;padding:0;margin:6px 0;columns:2}
.footer-cols li{margin:3px 0}
.small{font-size:.8rem}
@media (max-width:860px){
  .tool{grid-template-columns:1fr}
  .output{position:static}
  .preview-wrap{max-height:60vh;min-height:200px}
  .site-header{padding:8px 14px}
  .site-header nav{gap:12px;font-size:.9rem}
  main{padding:0 10px}
  .content{padding:16px}
}
@media (hover:none){.hide-touch{display:none}}
@media (max-width:520px){.legend .sku{display:none}}
.lang-switch{display:inline-flex;align-items:center;gap:6px;border:1.5px solid var(--accent);color:var(--accent)!important;border-radius:999px;padding:4px 12px;font-weight:700;text-decoration:none}
.lang-switch:hover{background:var(--accent);color:#fff!important}
.lang-banner{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap;background:#1f1d2b;color:#fff;padding:10px 16px;font-size:.95rem}
.lang-banner[hidden]{display:none}
.lang-banner-go{background:var(--accent);color:#fff;border-radius:999px;padding:6px 14px;font-weight:700;text-decoration:none}
.lang-banner-close{background:none;border:1px solid rgba(255,255,255,.5);color:#fff;border-radius:999px;padding:5px 12px;font:inherit;cursor:pointer}
:lang(zh) body,html:lang(zh-CN) body{font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif}
.site-header .lang-switch{order:3}
.site-header nav{order:2;margin-left:auto}
@media (max-width:860px){
  .site-header .lang-switch{order:2;margin-left:auto;padding:5px 12px}
  .site-header nav{order:3;width:100%;margin-left:0}
}
.zoom-row label,.pdf-opts label{white-space:nowrap}