:root {
  --bg: #f5f6f8; --panel: #fff; --text: #1f2328; --muted: #6b7280; --line: #e5e7eb;
  --primary: #2563eb; --primary-weak: #eff4ff; --ok: #16a34a; --warn: #d97706; --danger: #dc2626;
  --ok-weak: #e8f7ee; --warn-weak: #fdf3e6; --danger-weak: #fdecec;
  --radius: 10px; --shadow: 0 1px 2px rgba(0,0,0,.05), 0 2px 8px rgba(0,0,0,.04);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115; --panel: #181b21; --text: #e6e8eb; --muted: #9aa1ab; --line: #2a2f37;
    --primary: #4f8cff; --primary-weak: #1a2640; --shadow: none;
    --ok-weak: #14301f; --warn-weak: #3a2a12; --danger-weak: #3a1a1a;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; }
header { background: var(--panel); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.bar { max-width: 1280px; margin: 0 auto; padding: 0 16px; display: flex; align-items: center; gap: 16px; height: 56px; }
.brand { font-weight: 700; font-size: 16px; white-space: nowrap; }
.language-picker { display: flex; align-items: center; gap: 6px; white-space: nowrap; color: var(--muted); font-size: 12px; }
.language-picker select { width: auto; min-width: 84px; padding: 5px 7px; }
#login .language-picker { justify-content: flex-end; margin-bottom: 12px; }
@media (max-width: 760px) { .bar { flex-wrap: wrap; height: auto; min-height: 56px; padding-top: 8px; padding-bottom: 8px; gap: 6px 10px; } nav { order: 3; flex-basis: 100%; } }
nav { display: flex; gap: 2px; flex: 1; overflow-x: auto; scrollbar-width: none; }
nav button { background: none; border: 0; padding: 8px 10px; border-radius: 8px; cursor: pointer; color: var(--muted); white-space: nowrap; }
nav button.active { background: var(--primary-weak); color: var(--primary); font-weight: 600; }
main { max-width: 1280px; margin: 0 auto; padding: 16px; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat { padding: 14px 16px; }
.stat .label { color: var(--muted); font-size: 13px; }
.stat .value { font-size: 24px; font-weight: 700; margin-top: 4px; font-variant-numeric: tabular-nums; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; padding: 12px; border-bottom: 1px solid var(--line); align-items: center; }
.toolbar .grow { flex: 1; min-width: 160px; }
input, select, textarea { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; width: 100%; }
input[type=checkbox] { width: auto; accent-color: var(--primary); }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primary); outline-offset: -1px; border-color: transparent; }
.toolbar select, .toolbar input[type=month] { width: auto; }
.btn { border: 1px solid var(--line); background: var(--panel); padding: 8px 14px; border-radius: 8px; cursor: pointer; white-space: nowrap; text-decoration: none; display: inline-block; }
.btn:hover { border-color: var(--muted); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.danger { color: var(--danger); }
.btn.sm { padding: 4px 10px; font-size: 13px; }
.btn.in { color: var(--ok); } .btn.out { color: var(--warn); }
.linkbtn { background: none; border: 0; color: var(--primary); cursor: pointer; padding: 0; font-size: 13px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--muted); font-weight: 500; font-size: 13px; background: var(--bg); }
th.sortable { cursor: pointer; user-select: none; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
td.wrap { white-space: normal; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: var(--primary-weak); }
tfoot td { border-top: 1px solid var(--line); border-bottom: 0; }
.actions { display: flex; gap: 4px; justify-content: flex-end; }
.tag { display: inline-block; padding: 1px 8px; border-radius: 99px; font-size: 12px; white-space: nowrap; }
.tag.low, .tag.overdue { background: var(--danger-weak); color: var(--danger); }
.tag.in, .tag.paid, .tag.received { background: var(--ok-weak); color: var(--ok); }
.tag.out, .tag.partial { background: var(--warn-weak); color: var(--warn); }
.tag.adjust, .tag.unpaid { background: var(--primary-weak); color: var(--primary); }
.tag.void { background: var(--bg); color: var(--muted); text-decoration: line-through; }
tr.voided td { color: var(--muted); }
.qty-low, .neg { color: var(--danger); font-weight: 600; }
.pos { color: var(--ok); }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.empty { padding: 40px; text-align: center; color: var(--muted); white-space: normal; }
.section-title { font-weight: 600; padding: 12px; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; min-height: 49px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 900px) { .grid3 { grid-template-columns: 1fr; } }
@media (max-width: 800px) { .grid2 { grid-template-columns: 1fr; } .hide-sm { display: none; } }
.mb { margin-bottom: 16px; }

dialog { border: 1px solid var(--line); border-radius: 12px; padding: 0; background: var(--panel); color: var(--text); width: min(560px, calc(100vw - 32px)); max-height: calc(100vh - 32px); }
dialog.wide { width: min(1000px, calc(100vw - 32px)); }
dialog.mid { width: min(860px, calc(100vw - 32px)); }
dialog::backdrop { background: rgba(0,0,0,.4); }
dialog > form, dialog > .dlg-body { padding: 20px; }
dialog h3 { margin: 0 0 16px; }
.fields { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.fields.three { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 640px) { .fields, .fields.three { grid-template-columns: 1fr; } }
.fields .full { grid-column: 1 / -1; }
label.f, div.f { display: block; font-size: 13px; color: var(--muted); }
label.f > input, label.f > select, label.f > textarea, div.f > .row { margin-top: 4px; color: var(--text); }
label.check { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text); cursor: pointer; }
.row { display: flex; gap: 6px; align-items: center; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 20px; flex-wrap: wrap; }
.dialog-actions .left { margin-right: auto; }
.seg { display: flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.seg label { flex: 1; text-align: center; padding: 8px; cursor: pointer; border-right: 1px solid var(--line); }
.seg label:last-child { border-right: 0; }
.seg input { display: none; }
.seg label:has(input:checked) { background: var(--primary); color: #fff; }
fieldset { border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px 16px; margin: 0 0 16px; min-width: 0; }
fieldset .table-wrap, fieldset table { max-width: 100%; }
legend { padding: 0 6px; font-weight: 600; }
.hint { font-size: 12px; color: var(--muted); margin: 4px 0 0; }
.import-help { border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; margin-bottom: 12px; font-size: 13px; }
.import-help summary { cursor: pointer; color: var(--primary); font-weight: 500; }
.import-help ul { margin: 8px 0; padding-left: 20px; }
.import-help table { border: 1px solid var(--line); border-radius: 8px; }
.import-help th, .import-help td { padding: 6px 10px; }

/* 单据编辑行 */
.lines td { padding: 6px; vertical-align: top; }
.lines input, .lines select { padding: 6px 8px; }
.lines .w-qty { width: 80px; } .lines .w-price { width: 110px; } .lines .w-disc { width: 70px; }
.lines td.amt { padding-top: 12px; }
.sum { display: grid; grid-template-columns: 1fr auto; gap: 4px 0; margin-left: auto; width: min(360px, 100%); font-variant-numeric: tabular-nums; }
.sum > div:nth-child(even) { text-align: right; padding-left: 24px; }
.sum .total { font-size: 18px; font-weight: 700; border-top: 1px solid var(--line); padding-top: 6px; }
.internal { background: var(--primary-weak); border-radius: 8px; padding: 10px 12px; margin-top: 12px; display: flex; gap: 8px 20px; flex-wrap: wrap; font-size: 13px; }
.stock-warn { color: var(--danger); font-size: 12px; }

/* 图片 */
.thumb { width: 44px; height: 44px; border-radius: 6px; object-fit: cover; background: var(--bg); border: 1px solid var(--line); display: block; cursor: zoom-in; }
.thumb.none { display: grid; place-items: center; color: var(--muted); font-size: 18px; cursor: default; }
td.img { width: 60px; padding-right: 0; }
.imgs { display: grid; grid-template-columns: repeat(auto-fill, minmax(84px, 1fr)); gap: 8px; margin-top: 4px; }
.imgs .cell { position: relative; aspect-ratio: 1; border-radius: 8px; overflow: hidden; border: 1px solid var(--line); background: var(--bg); }
.imgs .cell img { width: 100%; height: 100%; object-fit: cover; display: block; cursor: zoom-in; }
.imgs .cell .cover { position: absolute; left: 4px; top: 4px; background: var(--primary); color: #fff; font-size: 11px; padding: 0 6px; border-radius: 4px; }
.imgs .cell .ops { position: absolute; inset: auto 0 0 0; display: flex; background: rgba(0,0,0,.55); }
.imgs .cell .ops button { flex: 1; white-space: nowrap; background: none; border: 0; color: #fff; font-size: 12px; padding: 3px 0; cursor: pointer; }
.imgs .add { display: grid; place-items: center; aspect-ratio: 1; border: 1px dashed var(--muted); border-radius: 8px; cursor: pointer; color: var(--muted); text-align: center; font-size: 12px; line-height: 1.4; }
.imgs .add:hover { border-color: var(--primary); color: var(--primary); }
.imgs.drag .add { border-color: var(--primary); background: var(--primary-weak); }
.logo-box { display: flex; gap: 12px; align-items: center; }
.logo-box img { max-height: 60px; max-width: 200px; border: 1px solid var(--line); border-radius: 6px; background: #fff; padding: 4px; }
#viewer { width: 100vw; height: 100vh; max-width: none; max-height: none; border: 0; border-radius: 0; background: rgba(0,0,0,.92); padding: 0; }
#viewer img { position: absolute; inset: 0; margin: auto; max-width: calc(100% - 32px); max-height: calc(100% - 96px); object-fit: contain; }
#viewer .vbtn { position: absolute; background: rgba(255,255,255,.15); color: #fff; border: 0; border-radius: 99px; width: 44px; height: 44px; font-size: 22px; cursor: pointer; }
#viewer .vbtn:hover { background: rgba(255,255,255,.3); }
#viewer .prev { left: 12px; top: 50%; transform: translateY(-50%); } #viewer .next { right: 12px; top: 50%; transform: translateY(-50%); }
#viewer .x { right: 12px; top: 12px; }
#viewer .cap { position: absolute; bottom: 16px; left: 0; right: 0; text-align: center; color: #ddd; }

#toast { position: fixed; inset: auto auto 20px 50%; margin: 0; border: 0; transform: translateX(-50%); background: #111; color: #fff; padding: 10px 16px; border-radius: 8px; opacity: 0; transition: opacity .2s; pointer-events: none; z-index: 100; max-width: calc(100vw - 32px); }
#toast.show { opacity: .92; }
#login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
#login .panel { padding: 28px; width: min(360px, 100%); }
.hidden { display: none !important; }

/* ---------- 打印单据（澳洲 Tax Invoice 样式）：始终白底黑字 ---------- */
.doc { -webkit-print-color-adjust: exact; print-color-adjust: exact; background: #fff; color: #1a1a1a; padding: 40px; border: 1px solid #e5e7eb; border-radius: 8px; position: relative; font: 13px/1.45 "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif; overflow: hidden; }
.doc table { margin: 0; }
.doc th, .doc td { border-bottom: 1px solid #e5e7eb; white-space: normal; padding: 8px 10px; color: #1a1a1a; }
.doc th { background: #f3f4f6; color: #374151; font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .3px; }
.doc tbody tr:hover { background: none; }
.doc .d-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 24px; }
.doc .d-logo { max-height: 70px; max-width: 220px; margin-bottom: 8px; display: block; }
.doc .d-company { font-size: 18px; font-weight: 700; }
.doc .d-title { font-size: 26px; font-weight: 800; letter-spacing: 1px; text-align: right; white-space: nowrap; }
.doc .d-sub { color: #4b5563; }
.doc .d-lbl { color: #6b7280; font-size: 11px; text-transform: uppercase; letter-spacing: .5px; }
.doc .d-parties { display: flex; justify-content: space-between; gap: 24px; margin: 28px 0 20px; }
.doc .d-meta { display: grid; grid-template-columns: auto auto; gap: 2px 16px; align-content: start; }
.doc .d-meta > :nth-child(odd) { color: #6b7280; }
.doc .d-meta > :nth-child(even) { text-align: right; font-weight: 600; }
.doc .pre { white-space: pre-line; }
.doc .d-totals { display: grid; grid-template-columns: 1fr auto; width: min(320px, 100%); margin: 16px 0 0 auto; font-variant-numeric: tabular-nums; }
.doc .d-totals > div { padding: 4px 0; }
.doc .d-totals > div:nth-child(even) { text-align: right; padding-left: 24px; }
.doc .d-totals .strong { font-weight: 700; border-top: 1px solid #1a1a1a; padding-top: 8px; margin-top: 4px; }
.doc .d-totals .due { font-size: 17px; font-weight: 800; background: #f3f4f6; padding: 8px 10px; }
.doc .d-pay { margin-top: 28px; border-top: 2px solid #1a1a1a; padding-top: 14px; display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.doc .d-pay .d-meta > :nth-child(even) { text-align: left; }
.doc .d-note { margin-top: 20px; white-space: pre-line; }
.doc .d-foot { margin-top: 28px; text-align: center; color: #4b5563; font-size: 12px; }
.doc .d-aging { margin-top: 16px; }
.doc .d-aging td, .doc .d-aging th { text-align: center; }
.doc .stamp { position: absolute; top: 150px; right: 50px; transform: rotate(-14deg); border: 4px solid; font-size: 40px; font-weight: 900; padding: 2px 20px; border-radius: 8px; opacity: .3; pointer-events: none; letter-spacing: 4px; }
.doc .stamp.paid { color: #16a34a; } .doc .stamp.void { color: #dc2626; }
@media (max-width: 640px) {
  .doc { padding: 16px; overflow-x: auto; }
  .doc th, .doc td { padding: 6px 4px; font-size: 11px; }
  .doc .d-head, .doc .d-parties { flex-direction: column; }
  .doc .d-title { text-align: left; }
}
#printRoot { display: none; }
@media print {
  @page { size: A4; margin: 12mm; }
  body.printing { background: #fff; }
  body.printing > :not(#printRoot) { display: none !important; }
  body.printing #printRoot { display: block; }
  #printRoot .doc { border: 0; padding: 0; border-radius: 0; }
  #printRoot .doc tr { break-inside: avoid; }
}