:root {
  color-scheme: light dark;

  /* Semantic tokens. Names and values come from 系统设计说明书 6.1 and are
     verified by tools/check-consistency.py; do not rename or retune them here. */
  --oc-bg: #f1f3f2;
  --oc-bg-elevated: #ffffff;
  --oc-bg-secondary: #f4f6f4;
  --oc-label: #18201c;
  --oc-label-2: #68716c;
  --oc-label-3: #8a928d;
  --oc-separator: #dfe4e1;
  --oc-fill: #f1f4f2;
  --oc-brand: #08783f;
  --oc-brand-pressed: #066435;
  --oc-on-brand: #ffffff;
  --oc-danger: #a4372a;
  --oc-danger-surface: #fdecea;
  --oc-success: #08733d;
  --oc-success-surface: #eaf6ef;
  --oc-warning: #7a5411;
  --oc-warning-surface: #fdf3e0;
  --oc-focus: #3b6fd4;
  --oc-scrim: rgb(0 0 0 / 42%);

  --oc-text-hero: 34px;
  --oc-text-display: 28px;
  --oc-text-heading: 18px;
  --oc-text-title: 22px;
  --oc-text-body: 16px;
  --oc-text-secondary: 14px;
  --oc-text-caption: 13px;

  --oc-control-height: 44px;
  --oc-control-padding-block: 8px;
  --oc-control-padding-inline: 12px;
  --oc-radius: 8px;
  /* The select indicator is an asset, not a colour: one per scheme. */
  --oc-select-indicator: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5 11 1.5' fill='none' stroke='%2368716c' stroke-width='1.75' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");

  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: var(--oc-text-body);
  line-height: 1.5;
  background: var(--oc-bg);
}

@media (prefers-color-scheme: dark) {
  :root {
    --oc-bg: #000000;
    --oc-bg-elevated: #1c1e1d;
    --oc-bg-secondary: #2a2d2b;
    --oc-label: #f2f4f3;
    --oc-label-2: #a2aba6;
    --oc-label-3: #767e79;
    --oc-separator: #333835;
    --oc-fill: #2a2d2b;
    --oc-brand: #35c17a;
    --oc-brand-pressed: #2aa967;
    --oc-on-brand: #06281a;
    --oc-danger: #ff6b5e;
    --oc-danger-surface: #3a201d;
    --oc-success: #3dd27f;
    --oc-success-surface: #12301f;
    --oc-warning: #e8b045;
    --oc-warning-surface: #33270f;
    --oc-focus: #6e9bf0;
    --oc-scrim: rgb(0 0 0 / 20%);
    --oc-select-indicator: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5 11 1.5' fill='none' stroke='%23a2aba6' stroke-width='1.75' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--oc-bg);
  color: var(--oc-label);
  -webkit-font-smoothing: antialiased;
}

[x-cloak] { display: none !important; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

main {
  width: min(100%, 480px);
  margin: 0 auto;
  padding: 24px 16px calc(32px + env(safe-area-inset-bottom));
}

.page-title { margin: 0 0 18px; font-size: var(--oc-text-title); line-height: 1.3; }
.page-context { margin: 0 0 16px; color: var(--oc-label-2); font-size: var(--oc-text-secondary); overflow-wrap: anywhere; }
input, select, textarea { font-size: var(--oc-text-body); }
button, a, summary { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 2px solid var(--oc-focus); outline-offset: 3px; }
/* The native marker is a green triangle beside rows that use a chevron;
   drawing our own keeps the two consistent. */
summary { cursor: pointer; padding: 12px 0; color: var(--oc-brand); list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 10px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "›"; color: var(--oc-label-3); font-size: var(--oc-text-heading); line-height: 1; }
details[open] > summary::after { content: "⌄"; }
details.card { padding: 0 14px 12px; }

.station {
  margin: 0;
  font-size: var(--oc-text-heading);
  font-weight: 600;
}

.station-heading {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0 2px 18px;
}

.station-heading > span { color: var(--oc-label-2); font-size: var(--oc-text-secondary); }
.station-heading > .plate-owner { width: fit-content; margin-top: 5px; padding: 2px 7px; border-radius: 4px; background: var(--oc-fill); color: var(--oc-label-2); }

.section-label {
  margin: 0 2px 8px;
  color: var(--oc-label-2);
  font-size: var(--oc-text-caption);
  font-weight: 400;
}

.card {
  overflow: hidden;
  margin-bottom: 16px;
  border-radius: 8px;
  background: var(--oc-bg-elevated);
}

.cell {
  display: flex;
  min-height: 66px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--oc-separator);
  color: inherit;
  text-decoration: none;
}

.cell:last-child { border-bottom: 0; }
.cell:active { background: var(--oc-bg-secondary); }
.cell strong { display: block; font-size: var(--oc-text-secondary); font-weight: 500; }
.cell small { display: block; margin-top: 2px; color: var(--oc-label-2); font-size: var(--oc-text-caption); }
.chevron { color: var(--oc-label-3); font-size: var(--oc-text-heading); }

.loading {
  padding: 28px 14px;
  color: var(--oc-label-2);
  text-align: center;
  font-size: var(--oc-text-secondary);
}

.state-panel {
  display: flex;
  min-height: 280px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--oc-label-2);
  text-align: center;
}

.state-panel h1 { margin: 0; color: var(--oc-label); font-size: var(--oc-text-heading); }
.state-panel p { max-width: 280px; margin: 0 0 8px; font-size: var(--oc-text-secondary); }

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--oc-fill);
  border-top-color: var(--oc-brand);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.state-icon {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  border-radius: 50%;
  color: var(--oc-on-brand);
  font-size: var(--oc-text-display);
  font-weight: 600;
}

.state-icon.error { background: var(--oc-danger); }
.state-icon.success { background: var(--oc-brand); }

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.section-heading a { color: var(--oc-brand); font-size: var(--oc-text-caption); text-decoration: none; }
.section-heading a[aria-disabled="true"] { color: var(--oc-label-2); pointer-events: none; }
.nozzle-placeholder { min-height: 76px; margin-bottom: 22px; }

.nozzle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 9px;
  margin-bottom: 22px;
}

.nozzle {
  min-width: 0;
  min-height: 76px;
  padding: 12px 6px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--oc-bg-elevated);
  color: var(--oc-label);
  font: inherit;
  text-align: center;
}

.nozzle strong, .nozzle small { display: block; }
.nozzle strong { overflow-wrap: anywhere; font-size: var(--oc-text-secondary); font-weight: 600; }
.nozzle small { overflow-wrap: anywhere; color: var(--oc-label-2); font-size: var(--oc-text-caption); }
.nozzle.selected { border-color: var(--oc-brand); background: var(--oc-success-surface); }

.nozzle-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px;
}

.nozzle-summary strong, .nozzle-summary small { display: block; }
.nozzle-summary small { color: var(--oc-label-2); font-size: var(--oc-text-caption); }
.price { text-align: right; }
.price strong { font-size: var(--oc-text-heading); font-variant-numeric: tabular-nums; }

.amount-card { padding: 14px; }

.amount-input {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 7px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--oc-separator);
}

.amount-input > span { font-size: var(--oc-text-display); font-weight: 600; }
.amount-input > small { color: var(--oc-label-2); font-size: var(--oc-text-secondary); }
.amount-input input {
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--oc-label);
  font: inherit;
  font-size: var(--oc-text-hero);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.amount-input input::placeholder { color: var(--oc-label-3); }
.discount-rule { margin: 10px 0 0; color: var(--oc-success); font-size: var(--oc-text-caption); }
.field-error, .form-error { color: var(--oc-danger); font-size: var(--oc-text-caption); }
.field-error { margin: 9px 0 0; }
.form-error { margin: 12px 2px 16px; text-align: center; overflow-wrap: anywhere; }
.button + .form-error, .button + .control-note { margin-top: 12px; }
.form-error + .button, .control-note + .button { margin-top: 12px; }

.quote-card { padding: 14px; }
.quote-total, .quote-meta { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.quote-total > span { color: var(--oc-label-2); font-size: var(--oc-text-secondary); }
.quote-total strong { font-size: var(--oc-text-title); font-variant-numeric: tabular-nums; }
.number-unit { margin-left: .25em; font-size: max(var(--oc-text-caption), .6em); font-weight: 400; color: var(--oc-label-2); }
.money-value { font-variant-numeric: tabular-nums; }
.detail-row .money-value, .quantity-value { font-weight: 600; font-variant-numeric: tabular-nums; }
.quote-meta { margin-top: 7px; color: var(--oc-label-2); font-size: var(--oc-text-caption); }
.quote-meta > span:last-child { color: var(--oc-success); }

.button {
  display: block;
  width: 100%;
  min-height: 48px;
  padding: 12px;
  border: 0;
  border-radius: 8px;
  background: var(--oc-brand);
  color: var(--oc-on-brand);
  font: inherit;
  font-weight: 500;
  text-align: center;
  text-decoration: none;
}

.button:active { background: var(--oc-brand-pressed); }
/* The page background is nearly the fill colour, so a disabled button needs an
   outline to still read as a button rather than dissolving into the page. */
.button:disabled, .button[aria-disabled="true"] { background: var(--oc-fill); color: var(--oc-label-2); border: 1px solid var(--oc-separator); }
.button[aria-disabled="true"] { pointer-events: none; }
.button.secondary { width: min(100%, 280px); padding: 12px; border: 1px solid var(--oc-separator); background: var(--oc-bg-elevated); color: var(--oc-label); }
.bottom-action { margin-top: 20px; }

.payment-hero {
  display: flex;
  min-height: 210px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-align: center;
}

.payment-hero h1, .payment-hero h2 { margin: 0; font-size: var(--oc-text-heading); }
.state-panel h2 { margin: 0; color: var(--oc-label); font-size: var(--oc-text-heading); }
.payment-hero > strong { font-size: var(--oc-text-display); font-variant-numeric: tabular-nums; }
.payment-hero p { margin: 0; color: var(--oc-label-2); font-size: var(--oc-text-secondary); }
.payment-hero .no-debit { color: var(--oc-label); }

.detail-card { padding: 0 14px; }
.detail-row {
  display: flex;
  min-height: 52px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--oc-separator);
  font-size: var(--oc-text-secondary);
}
.detail-row:last-child { border-bottom: 0; }
.detail-row > span { flex: none; color: var(--oc-label-2); }
.detail-row b { min-width: 0; font-weight: 400; text-align: right; overflow-wrap: anywhere; }
.detail-row .discount { color: var(--oc-success); }
.detail-row .order-number { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: var(--oc-text-caption); }

.invoice-card { padding: 14px; }
.invoice-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.invoice-card p { color: var(--oc-label-2); font-size: var(--oc-text-caption); line-height: 1.75; }
.invoice-card .button.secondary { width: 100%; }
.invoice-meta { display: flex; justify-content: space-between; gap: 10px; margin-top: 9px; color: var(--oc-label-2); font-size: var(--oc-text-caption); }
.status-pill { padding: 2px 8px; border-radius: 4px; font-size: var(--oc-text-caption); }
.status-pill { background: var(--oc-warning-surface); color: var(--oc-warning); }
.status-pill.success { background: var(--oc-success-surface); color: var(--oc-success); }
.notice { margin: 0 0 16px; padding: 11px 13px; border-radius: 8px; background: var(--oc-warning-surface); color: var(--oc-warning); font-size: var(--oc-text-caption); }
.notice.neutral { background: var(--oc-bg-elevated); color: var(--oc-label-2); }
.notice.danger { background: var(--oc-danger-surface); color: var(--oc-danger); }

.selection-list {
  display: grid;
  gap: 9px;
  margin-bottom: 12px;
}

.selection-card {
  display: flex;
  flex-wrap: wrap;
  width: 100%;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--oc-bg-elevated);
  color: var(--oc-label);
  font: inherit;
  text-align: left;
}

.selection-card.selected { border-color: var(--oc-brand); background: var(--oc-success-surface); }
.selection-card > span { min-width: 0; flex: 1 1 140px; }
.selection-card strong, .selection-card small { display: block; overflow-wrap: anywhere; }
.selection-card strong { font-size: var(--oc-text-secondary); font-weight: 600; }
.selection-card small { margin-top: 2px; color: var(--oc-label-2); font-size: var(--oc-text-caption); }
.selection-card > .selection-value { flex: 0 0 auto; max-width: 100%; text-align: right; }
.selection-value b { font-size: var(--oc-text-heading); font-variant-numeric: tabular-nums; white-space: nowrap; }

.inline-action { display: block; margin: -2px 2px 18px; color: var(--oc-brand); font-size: var(--oc-text-caption); text-align: right; text-decoration: none; }
.preset-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 9px; margin: -4px 0 16px; }
.preset-grid button, .segmented button { min-height: var(--oc-control-height); border: 1px solid var(--oc-separator); border-radius: 8px; background: var(--oc-bg-elevated); color: var(--oc-label); font: inherit; }
.preset-grid button:active, .segmented button:active { background: var(--oc-bg-secondary); }

.bind-card, .form-card { padding: 14px; }
.bind-card { margin-top: 24px; }
.bind-card h2 { margin: 0; font-size: var(--oc-text-body); }
.bind-card > p { margin: 4px 0 12px; color: var(--oc-label-2); font-size: var(--oc-text-caption); }
/* The one place native controls get their appearance. */
.text-input, select, textarea { width: 100%; min-height: var(--oc-control-height); padding: var(--oc-control-padding-block) var(--oc-control-padding-inline); border: 1px solid var(--oc-separator); border-radius: var(--oc-radius); background: var(--oc-bg-elevated); color: var(--oc-label); font: inherit; font-size: var(--oc-text-body); }
/* iOS Safari renders a default-appearance select at its own intrinsic height,
   honouring neither padding nor min-height. Turning the system appearance off
   restores the box; the indicator is drawn here instead. */
select { appearance: none; padding-inline-end: calc(var(--oc-control-padding-inline) + 20px); background-image: var(--oc-select-indicator); background-repeat: no-repeat; background-position: right var(--oc-control-padding-inline) center; background-size: 12px 8px; }
.text-input.monospace { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 0; }
.full-width.button.secondary { width: 100%; }
.bind-card .button { margin-top: 12px; }
.control-note { margin: 8px 2px 0; color: var(--oc-label-2); font-size: var(--oc-text-caption); text-align: center; }

.account-summary { padding: 14px; }
.summary-heading, .balance-row { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.summary-heading { color: var(--oc-label-2); font-size: var(--oc-text-caption); }
.summary-heading b { color: var(--oc-label); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: var(--oc-text-secondary); overflow-wrap: anywhere; text-align: right; }
.balance-row { margin-top: 12px; }
.balance-row > span { color: var(--oc-label-2); font-size: var(--oc-text-caption); }
.balance-row strong { font-size: var(--oc-text-title); font-variant-numeric: tabular-nums; }
.confirm-row { display: flex; align-items: flex-start; gap: 10px; padding: 4px 2px; font-size: var(--oc-text-caption); }
.confirm-row input { width: 20px; height: 20px; margin: 0; accent-color: var(--oc-brand); }
.danger-button { background: var(--oc-danger); }
.danger-button:active { background: var(--oc-danger); }
.danger-button:disabled { background: var(--oc-fill); color: var(--oc-label-2); border: 1px solid var(--oc-separator); }
.state-icon.pending { background: var(--oc-warning); }

.segmented { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-bottom: 16px; }
.segmented button.selected { border-color: var(--oc-brand); background: var(--oc-success-surface); color: var(--oc-brand); }
.compact-hero { min-height: 190px; }
.invoice-card .button { margin-top: 12px; }
.quote-total, .quote-meta, .summary-heading, .balance-row { flex-wrap: wrap; }
.balance-row strong, .payment-hero > strong { max-width: 100%; overflow-wrap: anywhere; }
.notice, .control-note, .invoice-card p { font-size: var(--oc-text-secondary); }
.detail-row .order-number { font-size: var(--oc-text-caption); }
.cell strong { font-size: var(--oc-text-heading); }
.cell small, .nozzle small, .selection-card small { font-size: var(--oc-text-caption); color: var(--oc-label-2); }
.inline-action, .section-heading a { display: inline-block; padding: 10px 2px; font-size: var(--oc-text-secondary); }
.bind-card { margin-top: 20px; }
.bind-card summary { font-weight: 500; }

@media (max-width: 360px) {
  .selection-card { flex-direction: column; align-items: stretch; gap: 8px; }
  .selection-card > span { flex: auto; }
  .selection-value b { white-space: nowrap; }
}

@media (prefers-reduced-motion: reduce) {
  .spinner { animation: none; }
}

@media (min-width: 600px) {
  main { padding-top: 28px; }
}
/* Native top-layer dialog; fixed positioning also supports older WeChat webviews. */
.operation-error-dialog {
  position: fixed;
  inset: 0;
  margin: auto;
  width: min(360px, calc(100vw - 32px));
  max-height: calc(100dvh - 48px);
  overflow: auto;
  border: 0;
  border-radius: 16px;
  padding: 24px;
  color: var(--oc-label);
  background: var(--oc-bg-elevated);
  box-shadow: 0 12px 48px var(--oc-scrim);
  z-index: 1000;
}
.operation-error-dialog::backdrop { background: var(--oc-scrim); }
.operation-error-dialog[open] { display: block; }
.operation-error-dialog:not([open]) { display: none; }
.operation-error-dialog h2 { margin: 0 0 16px; font-size: var(--oc-text-heading); }
.operation-error-dialog p { white-space: pre-line; overflow-wrap: anywhere; margin: 0 0 24px; }
.operation-error-dialog .button { width: 100%; }

[hidden] { display: none !important; }
/* Static shells can paint as soon as CSS arrives, before application modules. */
main.static-first-paint[hidden] { display: block !important; }
.request-status { display: flex; align-items: center; justify-content: center; gap: 10px; margin: 12px 0 20px; color: var(--oc-label-2); font-size: var(--oc-text-secondary); }
.request-status p { margin: 0; }
.request-status .spinner { flex: none; width: 18px; height: 18px; border-width: 2px; }
.button .button-spinner { display: inline-block; vertical-align: -.15em; width: 16px; height: 16px; margin-right: 8px; border-width: 2px; border-color: currentColor; border-right-color: transparent; }
.preparation-slot { min-height: 44px; padding-top: 12px; }
.preparation-slot .request-status { margin: 0; }
.no-script-notice { width: min(calc(100% - 32px), 448px); margin: 16px auto; }