:root{
  --bg:#f3f6fa;
  --panel:#ffffff;
  --panel-soft:#f8fafc;
  --border:#dbe3ec;
  --border-strong:#c8d3df;
  --text:#172033;
  --muted:#667085;
  --muted-2:#98a2b3;
  --primary:#2557d6;
  --primary-hover:#1f49b6;
  --primary-soft:#eef4ff;
  --shadow:0 2px 12px rgba(16,24,40,.06);
  --shadow-lg:0 12px 40px rgba(16,24,40,.14);
}
*{box-sizing:border-box}
html,body,#root{height:100%;margin:0}
body{font-family:Inter,Segoe UI,Microsoft YaHei,system-ui,-apple-system,BlinkMacSystemFont,sans-serif;font-size:13px;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
button,input,select{font:inherit}
.app{display:grid;grid-template-columns:304px minmax(0,1fr) 306px;height:100vh;overflow:hidden;background:var(--bg)}
.left-panel,.right-panel{background:var(--panel);overflow-y:auto;padding:16px 14px 18px;scrollbar-width:thin}
.left-panel{border-right:1px solid var(--border)}
.right-panel{border-left:1px solid var(--border)}
.center{display:flex;flex-direction:column;min-width:0;overflow:hidden;background:var(--panel-soft)}
.panel-section{margin:0 0 12px;padding:14px;border:1px solid var(--border);border-radius:10px;background:var(--panel);box-shadow:var(--shadow)}
.panel-section:last-child{margin-bottom:0}
.panel-section h2{font-size:12px;letter-spacing:.05em;color:#475467;margin:0 0 9px;display:flex;align-items:center;justify-content:space-between;font-weight:700}
.hint{color:var(--muted-2);font-size:11px;line-height:1.5;margin:6px 0 0}
.box-select{width:100%;min-height:36px;padding:7px 10px;border:1px solid var(--border-strong);border-radius:8px;font-size:13px;background:#fff;color:var(--text);outline:none;transition:border-color .15s,box-shadow .15s}
.box-select:focus{border-color:#8cabf1;box-shadow:0 0 0 3px rgba(37,87,214,.10)}
.material-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px}
.chip{padding:7px 8px;border:1px solid var(--border);border-radius:8px;background:var(--panel-soft);font-size:12px;cursor:pointer;color:#344054;transition:.15s}
.chip:hover{border-color:#a9b8cc;background:#fff}
.chip.active{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 2px 8px rgba(37,87,214,.18)}
.num-field{display:flex;align-items:center;gap:7px;padding:5px 0}
.num-field span{width:78px;flex:none;color:#344054;line-height:1.25}
.num-field input{flex:1;min-width:0;min-height:34px;padding:7px 9px;border:1px solid var(--border-strong);border-radius:8px;font-size:13px;color:var(--text);background:#fff;outline:none;transition:border-color .15s,box-shadow .15s}
.num-field input:focus{border-color:#8cabf1;box-shadow:0 0 0 3px rgba(37,87,214,.10)}
.num-field em{font-style:normal;color:var(--muted-2);font-size:11px;width:25px;flex:none}
.num-field.disabled input{background:#f2f4f7;color:#98a2b3}
.topbar{display:flex;align-items:center;gap:8px;min-height:58px;padding:9px 14px;background:#fff;border-bottom:1px solid var(--border);box-shadow:0 1px 3px rgba(16,24,40,.03);z-index:3;flex-wrap:wrap}
.topbar .title{font-weight:750;font-size:14px;color:var(--text);letter-spacing:-.01em;white-space:nowrap}
.topbar-size{color:var(--muted);font-size:12px;margin-right:auto;white-space:nowrap}
.topbar .btn{white-space:nowrap}
.btn{min-height:34px;padding:7px 11px;border:1px solid var(--border-strong);border-radius:8px;background:#fff;font-size:12px;cursor:pointer;color:#344054;transition:border-color .15s,background .15s,box-shadow .15s,transform .05s}
.btn:hover:not(:disabled){border-color:#9fb0c5;background:#f8fafc;box-shadow:0 1px 4px rgba(16,24,40,.05)}
.btn:active:not(:disabled){transform:translateY(1px)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.active{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 2px 7px rgba(37,87,214,.18)}
.btn.active:hover:not(:disabled){background:var(--primary-hover);border-color:var(--primary-hover)}
.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff;width:100%;padding:9px 12px;margin-bottom:8px;font-weight:650;min-height:39px}
.btn-primary:hover:not(:disabled){background:var(--primary-hover);border-color:var(--primary-hover);box-shadow:0 4px 10px rgba(37,87,214,.17)}
.right-panel .panel-section{padding:16px}
.right-panel .panel-section h2{font-size:13px;letter-spacing:.03em;color:#344054;margin-bottom:12px}
.right-panel .btn{width:100%;margin-bottom:8px}
.right-panel .btn:not(.btn-primary){background:#fff}
.export-note{margin-top:12px;padding:10px 11px;border-radius:9px;background:#fffaeb;border:1px solid #fedf89;color:#92400e;font-size:12px;font-weight:600;line-height:1.55}
.viewport{flex:1;position:relative;overflow:hidden;background:radial-gradient(circle at 50% 45%,#fff 0,#f9fbfd 48%,#f2f5f8 100%);cursor:grab;touch-action:none}
.viewport:active{cursor:grabbing}
.net-svg{display:block}
.viewport-empty{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;color:var(--muted-2)}
.layer-row{display:flex;align-items:center;gap:8px;padding:5px 0;font-size:12px}
.layer-row em{margin-left:auto;font-style:normal;color:var(--muted-2);font-size:11px}
.layer-row.muted{color:var(--muted-2)}
.swatch{width:14px;height:14px;border-radius:4px;border:1px solid rgba(0,0,0,.08);flex:none}
.sw-cut{background:#111827}.sw-crease{background:#e11d48}.sw-teeth{background:#eab308}.sw-gray{background:#cbd5e1}
.stat-row{display:flex;justify-content:space-between;padding:7px 0;border-bottom:1px dashed var(--border);font-size:12px}.stat-row span{color:var(--muted)}.stat-row strong{font-variant-numeric:tabular-nums}
.viewport.panning{cursor:grabbing}
.modal-overlay{position:fixed;inset:0;background:rgba(15,23,42,.58);backdrop-filter:blur(3px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}
.modal-card{background:#fff;border-radius:16px;padding:26px;min-width:440px;max-width:720px;box-shadow:var(--shadow-lg);position:relative;border:1px solid rgba(255,255,255,.6)}
.modal-card h3{margin:0 0 18px;font-size:19px;color:var(--text);text-align:center;font-weight:750}
.modal-close{position:absolute;top:12px;right:12px;background:#f8fafc;border:1px solid var(--border);width:34px;height:34px;border-radius:50%;font-size:19px;line-height:1;cursor:pointer;color:#667085;transition:.15s}
.modal-close:hover{color:var(--text);background:#fff;border-color:#c5ced9}
.qr-grid{display:flex;gap:18px;justify-content:center;flex-wrap:wrap}
.qr-item{text-align:center;flex:1;min-width:150px;padding:10px 8px}
.qr-item img{display:block;max-width:170px;width:100%;aspect-ratio:1/1;object-fit:contain;margin:0 auto;border-radius:10px;border:1px solid var(--border);background:#fff;box-shadow:0 2px 10px rgba(16,24,40,.05)}
.qr-item p{margin:9px 0 0;font-size:13px;color:#475467;font-weight:600}
.b0201-form{display:grid;grid-template-columns:1fr 1fr;gap:8px 10px}
.b0201-field{display:flex;flex-direction:column;gap:3px;font-size:12px;color:#475569}
.b0201-field select,.b0201-field input{width:100%;padding:7px 9px;border:1px solid var(--border-strong);border-radius:8px;font-size:13px;background:#fff;color:var(--text)}
.b0201-field select:focus,.b0201-field input:focus{outline:none;border-color:#8cabf1;box-shadow:0 0 0 3px rgba(37,87,214,.10)}
.b0201-lwh{grid-column:1 / -1;display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.b0201-warn{margin-top:10px;padding:8px 10px;border-radius:8px;background:#fffaeb;border:1px solid #fedf89;color:#92400e;font-size:12px}
.b0201-result{margin-top:12px;display:flex;flex-direction:column;gap:6px}
.b0201-row{display:grid;grid-template-columns:62px repeat(3,1fr);gap:8px;align-items:center;padding:8px 10px;border:1px solid;border-radius:8px;font-size:13px}
.b0201-row b{font-weight:600;font-variant-numeric:tabular-nums}.b0201-tag{font-size:12px;font-weight:700}.b0201-row--press{background:#eff6ff;border-color:#bfdbfe;color:#1e40af}.b0201-row--inner{background:#f0fdf4;border-color:#bbf7d0;color:#166534}.b0201-row--outer{background:#fffbeb;border-color:#fde68a;color:#92400e}.b0201-flap{margin-top:2px;font-size:12px;color:var(--muted)}.b0201-actions{margin-top:12px;display:flex;justify-content:flex-end}
@media (max-width:1180px){.app{grid-template-columns:270px minmax(0,1fr) 270px}.topbar .title{font-size:13px}.topbar .btn{padding:6px 9px}}
@media (max-width:900px){.app{grid-template-columns:1fr;height:auto;min-height:100vh;overflow:visible}.left-panel,.right-panel{border:0;border-bottom:1px solid var(--border)}.center{min-height:65vh}.topbar{position:sticky;top:0}.topbar-size{margin-right:0}.viewport{min-height:55vh}.modal-card{min-width:0;width:min(92vw,560px)}}