:root{
  --bg:#f4f6fb;--card:#fff;--text:#172033;--muted:#6b7280;--line:#e5e7eb;--primary:#111827;--primary-2:#374151;--danger:#e11d48;--success:#059669;--warn:#d97706;--soft:#f8fafc;--shadow:0 18px 45px rgba(15,23,42,.08)
}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;font-size:14px}a{color:inherit}.app-shell{display:flex;min-height:100vh}.sidebar{width:248px;background:#0f172a;color:#e5e7eb;padding:22px 16px;display:flex;flex-direction:column;position:fixed;inset:0 auto 0 0}.logo-block{display:flex;gap:12px;align-items:center;margin-bottom:24px}.logo-mark{width:46px;height:46px;border-radius:16px;background:#fff;color:#0f172a;display:grid;place-items:center;font-weight:900;font-size:24px}.logo-block strong{display:block;font-size:16px}.logo-block span{display:block;color:#94a3b8;margin-top:4px;font-size:12px}.sidebar nav{display:grid;gap:6px}.sidebar nav a{display:flex;align-items:center;gap:10px;padding:11px 12px;border-radius:12px;text-decoration:none;color:#cbd5e1}.sidebar nav a:hover,.sidebar nav a.active{background:#1e293b;color:#fff}.sidebar-foot{margin-top:auto;color:#94a3b8;font-size:12px;line-height:1.7}.main-content{margin-left:248px;width:calc(100% - 248px);padding:24px}.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.brand-small{font-size:12px;letter-spacing:.16em;color:#64748b;font-weight:800}.topbar h1{margin:5px 0 0;font-size:26px}.user-box{background:#fff;border:1px solid var(--line);border-radius:16px;padding:10px 12px;display:flex;align-items:center;gap:10px;box-shadow:var(--shadow)}.user-box small{color:var(--muted)}.user-box a{color:#2563eb;text-decoration:none}.card{background:var(--card);border:1px solid rgba(226,232,240,.85);border-radius:18px;box-shadow:var(--shadow);padding:20px;margin-bottom:18px}.card h2{margin:0 0 14px;font-size:18px}.card-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:14px}.card-head h2{margin:0}.card-head a{color:#2563eb;text-decoration:none}.muted{color:var(--muted)}.empty{text-align:center;color:var(--muted);padding:24px!important}.grid{display:grid;gap:18px}.grid.two{grid-template-columns:1fr 1fr}.grid.aside-right{grid-template-columns:minmax(0,1.7fr) minmax(320px,.8fr)}.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:18px}.stat-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:var(--shadow)}.stat-card span{display:block;color:var(--muted);font-weight:700}.stat-card strong{display:block;font-size:28px;margin:10px 0}.stat-card em{font-style:normal;color:#94a3b8;font-size:12px}table{width:100%;border-collapse:collapse}th,td{padding:12px 10px;border-bottom:1px solid #eef2f7;text-align:left;vertical-align:middle}th{font-size:12px;color:#64748b;background:#f8fafc;font-weight:800;white-space:nowrap}td small{color:#7c8799}.right{text-align:right}.danger-text{color:var(--danger);font-weight:800}.success-text{color:var(--success);font-weight:800}.badge{display:inline-flex;align-items:center;border-radius:999px;padding:4px 8px;font-size:12px;font-weight:800;background:#eef2ff;color:#3730a3}.badge.ok{background:#ecfdf5;color:#047857}.badge.warn{background:#fffbeb;color:#b45309}.badge.secret{background:#f5f3ff;color:#6d28d9}.muted-badge{background:#f1f5f9;color:#64748b}.alert{border-radius:14px;padding:13px 16px;margin-bottom:16px;font-weight:700}.alert-success{background:#ecfdf5;color:#047857}.alert-danger{background:#fff1f2;color:#be123c}.alert-warn{background:#fffbeb;color:#b45309}.btn,button.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--line);background:#fff;color:#111827;border-radius:11px;padding:10px 13px;text-decoration:none;font-weight:800;cursor:pointer;line-height:1.1}.btn.primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn.primary:hover{background:var(--primary-2)}.btn.danger{color:#be123c;border-color:#fecdd3;background:#fff1f2}.btn.small{padding:7px 9px;font-size:12px}.btn.full{width:100%}.btn[disabled],button[disabled]{opacity:.45;cursor:not-allowed}form.inline{display:inline}form{margin:0}label{display:grid;gap:7px;font-weight:800;color:#374151}input,select,textarea{width:100%;border:1px solid #dbe2ea;border-radius:11px;background:#fff;padding:11px 12px;font:inherit;color:#111827}textarea{min-height:82px;resize:vertical}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.form-grid.one{grid-template-columns:1fr}.full-span{grid-column:1 / -1}.check{display:flex;align-items:center;gap:8px;font-weight:700}.check input{width:auto}.actions{white-space:nowrap}.product-form{grid-template-columns:repeat(4,1fr)}.login-body{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#f8fafc,#eef2ff);padding:20px}.login-card{width:min(440px,100%);background:#fff;border-radius:24px;padding:34px;box-shadow:0 30px 80px rgba(15,23,42,.14);border:1px solid var(--line)}.login-logo{width:66px;height:66px;border-radius:22px;background:#111827;color:white;display:grid;place-items:center;font-size:34px;font-weight:900}.login-card h1{margin:18px 0 4px}.login-card p{color:var(--muted);margin:0 0 22px}.login-card label{margin-top:14px}.login-card button{margin-top:18px}.demo-tip{margin-top:16px;color:#64748b;background:#f8fafc;border-radius:12px;padding:12px;line-height:1.7}.pos-layout{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(360px,.8fr);gap:18px}.scan-bar{display:grid;grid-template-columns:1fr auto;gap:10px;margin-bottom:12px}.store-switch{display:flex;gap:10px;align-items:end;margin-bottom:14px}.product-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.product-tile{background:#f8fafc;border:1px solid #e2e8f0;border-radius:16px;padding:14px;display:grid;gap:8px;text-align:left}.product-tile strong{font-size:14px}.product-tile span,.product-tile em{color:#64748b;font-style:normal;font-size:12px}.product-tile button{border:0;border-radius:10px;background:#111827;color:#fff;padding:8px;font-weight:800}.pos-cart{position:sticky;top:20px;align-self:start}.qty-input{width:76px;text-align:right}.checkout-form{display:grid;gap:12px;margin-top:16px}.total-line{display:flex;align-items:center;justify-content:space-between;background:#111827;color:#fff;border-radius:14px;padding:16px}.total-line strong{font-size:22px}.receipt{max-width:860px}.receipt-meta{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;background:#f8fafc;border-radius:14px;padding:14px;margin-bottom:14px}.receipt-total{text-align:right;line-height:1.4}.report-filter{display:flex;align-items:end;gap:12px;flex-wrap:wrap}.report-filter label{min-width:190px}@media(max-width:1180px){.stats-grid{grid-template-columns:repeat(2,1fr)}.grid.two,.grid.aside-right,.pos-layout{grid-template-columns:1fr}.pos-cart{position:static}.product-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:760px){.sidebar{position:static;width:auto}.app-shell{display:block}.main-content{margin-left:0;width:100%;padding:14px}.topbar{display:grid;gap:12px}.user-box{justify-content:space-between}.stats-grid{grid-template-columns:1fr}.product-grid{grid-template-columns:1fr}.form-grid,.product-form{grid-template-columns:1fr}.scan-bar{grid-template-columns:1fr}.card{padding:15px;overflow-x:auto}table{min-width:720px}.login-card{padding:24px}}@media print{.sidebar,.topbar,.btn,.card-head button{display:none!important}.main-content{margin:0;width:100%;padding:0}.card{box-shadow:none;border:0}.receipt{max-width:100%;font-size:12px}}
.nav-group{display:grid;gap:4px}.nav-children{display:grid;gap:4px;margin-left:16px;padding-left:10px;border-left:1px solid rgba(148,163,184,.22)}.nav-children a{font-size:13px;padding:9px 10px!important}.nav-parent.active{background:#1e293b;color:#fff}.thumb{width:54px;height:54px;object-fit:cover;border-radius:12px;border:1px solid #e5e7eb;background:#f8fafc}.image-preview{display:flex;align-items:center;gap:12px;background:#f8fafc;border:1px solid #e5e7eb;border-radius:14px;padding:12px}.image-preview img{width:86px;height:86px;object-fit:cover;border-radius:14px;border:1px solid #e5e7eb}.custom-field-row{display:grid;grid-template-columns:minmax(160px,.35fr) minmax(220px,1fr) auto;gap:10px;align-items:center;margin-bottom:10px}.custom-field-row .btn{padding:9px 11px}.help-text{font-size:12px;color:#64748b;line-height:1.6;margin-top:4px}.table-toolbar{display:flex;gap:10px;align-items:end;flex-wrap:wrap}.table-toolbar label{min-width:180px}.table-toolbar .search-box{min-width:260px}.product-meta{display:flex;gap:6px;flex-wrap:wrap;margin-top:6px}.product-form .full-note{grid-column:1 / -1;color:#64748b;font-size:12px;line-height:1.7}@media(max-width:760px){.custom-field-row{grid-template-columns:1fr}.table-toolbar label,.table-toolbar .search-box{min-width:100%}.thumb{width:48px;height:48px}}
.pos-product-img{width:100%;height:96px;object-fit:cover;border-radius:12px;border:1px solid #e5e7eb;background:#fff}


/* v0.1.3：一级菜单悬停展开二级菜单，避免左侧菜单长期占用空间 */
.sidebar nav{position:relative}.nav-group{position:relative;display:block}.nav-group .nav-parent{position:relative}.nav-group .nav-parent:after{content:"›";margin-left:auto;color:#94a3b8;font-size:18px}.nav-children{display:none;position:absolute;left:calc(100% + 10px);top:0;min-width:184px;margin-left:0;padding:8px;border-left:0;border-radius:14px;background:#111827;border:1px solid rgba(148,163,184,.22);box-shadow:0 18px 45px rgba(15,23,42,.22);z-index:50}.nav-group:hover .nav-children,.nav-group:focus-within .nav-children{display:grid}.nav-children:before{content:"";position:absolute;left:-12px;top:0;width:12px;height:100%}.nav-children a{font-size:13px;padding:10px 12px!important}.page-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.import-form{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.import-form input[type=file]{width:auto;max-width:260px}.toolbar-line{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap}.toolbar-line .table-toolbar{margin-left:auto}.form-page-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:4px}.csv-tip{font-size:12px;color:#64748b;line-height:1.7;margin-top:10px}.mini-divider{height:1px;background:#eef2f7;margin:14px 0}
@media(max-width:760px){.nav-children{position:static;display:grid;margin:4px 0 4px 18px;box-shadow:none}.nav-group .nav-parent:after{display:none}.page-actions,.toolbar-line,.import-form{display:grid;width:100%}.import-form input[type=file]{width:100%;max-width:100%}.toolbar-line .table-toolbar{margin-left:0}}

/* v0.1.3：左侧菜单改为悬浮展开二级菜单 */
.sidebar nav{overflow:visible}.sidebar .nav-group{position:relative;display:block}.sidebar .nav-parent::after{content:'›';margin-left:auto;opacity:.7;font-size:18px;line-height:1}.sidebar .nav-group .nav-children{display:none;position:absolute;left:calc(100% + 10px);top:0;min-width:190px;margin:0;padding:8px;border:1px solid rgba(148,163,184,.25);border-radius:16px;background:#0f172a;box-shadow:0 20px 50px rgba(2,6,23,.28);z-index:80}.sidebar .nav-group:hover .nav-children,.sidebar .nav-group:focus-within .nav-children{display:grid;gap:4px}.sidebar .nav-children a{white-space:nowrap}.toolbar-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.toolbar-actions .btn{white-space:nowrap}.import-panel{display:flex;align-items:end;justify-content:space-between;gap:14px;flex-wrap:wrap;background:#f8fafc;border:1px dashed #cbd5e1;border-radius:16px;padding:14px;margin-bottom:16px}.import-panel form{display:flex;align-items:end;gap:10px;flex-wrap:wrap}.import-panel label{min-width:260px}.help-text{color:#64748b;font-size:12px;line-height:1.7;margin-top:6px}.form-page-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.page-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.table-meta{color:#64748b;font-size:12px}.form-section-title{grid-column:1/-1;margin:8px 0 -2px;font-size:16px}.csv-note{line-height:1.8;color:#64748b}
@media(max-width:760px){.sidebar .nav-group .nav-children{position:static;display:grid;margin-left:16px;padding-left:10px;border:0;border-left:1px solid rgba(148,163,184,.22);border-radius:0;background:transparent;box-shadow:none;min-width:0}.sidebar .nav-parent::after{content:''}.import-panel,.import-panel form{display:grid;align-items:stretch}.import-panel label{min-width:0}.page-actions,.toolbar-actions{align-items:stretch}.page-actions .btn,.toolbar-actions .btn{width:100%}}