:root {
  color-scheme: light;
  font-family: "Microsoft YaHei UI", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  --accent: #006eff;
  --accent-dark: #0057cc;
  --accent-soft: #edf5ff;
  --ink: #17243a;
  --muted: #637189;
  --subtle: #718096;
  --line: #d9e2ee;
  --line-strong: #c5d1e0;
  --surface: #ffffff;
  --surface-soft: #f7f9fc;
  --page: #f1f5fa;
  --danger: #c73535;
  --radius-card: 14px;
  --radius-control: 9px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html { min-width: 320px; background: var(--page); }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100dvh;
  background: var(--page);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

button, input, select { font: inherit; }
button, select { cursor: pointer; }

button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid rgba(0, 110, 255, 0.22);
  outline-offset: 2px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.97);
}

.topbar-inner,
.page-shell {
  width: min(1480px, calc(100% - 48px));
  margin: 0 auto;
}

.topbar-inner {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  margin: 0 0 3px;
  color: var(--accent);
  font: 750 10px/1.2 ui-monospace, SFMono-Regular, Consolas, monospace;
  letter-spacing: 0.14em;
}

h1 {
  margin: 0;
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.api-state {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  border: 1px solid #c7daf1;
  border-radius: var(--radius-control);
  background: #f3f8ff;
  color: #315c8b;
  padding: 0 12px;
  font-size: 12px;
  white-space: nowrap;
}

.api-state::before {
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 50%;
  background: currentColor;
  content: "";
}

.api-state:not(.ready):not(.error)::before { animation: status-pulse 1.8s ease-in-out infinite; }

@keyframes status-pulse {
  0%, 100% { opacity: 0.48; transform: scale(0.86); }
  50% { opacity: 1; transform: scale(1); }
}

.api-state.ready { border-color: #b9dcc9; background: #f1faf5; color: #25734d; }
.api-state.error { border-color: #efc1c1; background: #fff4f4; color: var(--danger); }

.page-shell { padding: 26px 0 56px; }

.intro {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 36px;
  margin-bottom: 18px;
}

.intro h2 {
  margin: 0 0 6px;
  font-size: clamp(23px, 2.2vw, 30px);
  line-height: 1.2;
  letter-spacing: -0.035em;
}

.intro p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.6; }
.token-field { width: min(300px, 100%); flex: 0 0 auto; }

label > span:first-child {
  display: block;
  margin-bottom: 7px;
  color: #47566f;
  font-size: 12px;
  font-weight: 700;
}

input,
select {
  width: 100%;
  height: 42px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-control);
  background: var(--surface);
  color: var(--ink);
  padding: 0 12px;
  transition: border-color 140ms ease, box-shadow 140ms ease, background-color 140ms ease;
}

input:hover,
select:hover { border-color: #94a8c0; }
input::placeholder { color: #68778b; opacity: 1; }
input:focus,
select:focus { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
input:disabled,
select:disabled { cursor: not-allowed; border-color: #e0e6ef; background: #f2f5f8; color: var(--subtle); }

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 370px;
  gap: 20px;
  align-items: start;
}

.config-column {
  min-width: 0;
  display: grid;
  gap: 20px;
}

.config-panel,
.voucher-panel,
.result-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--surface);
  box-shadow: 0 12px 34px rgba(52, 78, 111, 0.08);
}

.config-panel { overflow: hidden; }

fieldset {
  margin: 0;
  padding: 21px 24px 23px;
  border: 0;
  border-bottom: 1px solid #e7ecf3;
}

legend {
  width: 100%;
  margin: 0 0 17px;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 9px;
  color: #253650;
  font-size: 15px;
  font-weight: 750;
  letter-spacing: -0.01em;
}

legend::before {
  width: 3px;
  height: 15px;
  border-radius: 2px;
  background: var(--accent-dark);
  content: "";
}

.field-grid { display: grid; gap: 14px 16px; }
.field-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.field-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.field-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.field-grid.compact-filters { grid-template-columns: 100px 100px minmax(160px, 0.65fr) minmax(280px, 1.4fr); }
.field-grid .wide { min-width: 0; }

.unit-input { position: relative; display: block; }
.unit-input input { padding-right: 58px; }
.unit-input b {
  position: absolute;
  top: 50%;
  right: 12px;
  transform: translateY(-50%);
  color: #738198;
  font-size: 11px;
  font-weight: 700;
  pointer-events: none;
}

.field-note {
  margin: 10px 0 0;
  color: #68778c;
  font-size: 11px;
  line-height: 1.6;
}

.form-actions {
  display: flex;
  gap: 10px;
  padding: 18px 24px 20px;
  background: var(--surface-soft);
}

.primary-button,
.secondary-button,
.copy-button {
  min-height: 42px;
  border-radius: var(--radius-control);
  padding: 0 22px;
  font-weight: 750;
  white-space: nowrap;
  transition: border-color 130ms ease, background-color 130ms ease, color 130ms ease, transform 100ms ease;
}

.primary-button { border: 1px solid var(--accent-dark); background: var(--accent-dark); color: #fff; }
.primary-button:hover { border-color: #0049ad; background: #0049ad; }
.primary-button:disabled { cursor: not-allowed; border-color: #b4cae5; background: #dceafa; color: #536b87; }
.secondary-button { border: 1px solid var(--line-strong); background: #fff; color: #34445e; }
.secondary-button:hover { border-color: #9eafc5; background: #f5f8fb; }
.primary-button:active,
.secondary-button:active,
.copy-button:active,
.discount-presets button:active,
.voucher-fill-button:active { transform: translateY(1px); }

.voucher-panel {
  overflow: hidden;
  border-top: 3px solid #2c68b7;
}

.voucher-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid #e4ebf4;
  background: #fbfdff;
  padding: 20px 24px 18px;
}

.section-eyebrow {
  margin: 0 0 6px;
  color: #4773a8;
  font: 750 9px/1.3 ui-monospace, SFMono-Regular, Consolas, monospace;
  letter-spacing: 0.14em;
}

.voucher-heading h2 {
  margin: 0;
  color: #20334f;
  font-size: 19px;
  line-height: 1.3;
  letter-spacing: -0.025em;
}

.voucher-heading > div > p:last-child {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.voucher-state {
  flex: 0 0 auto;
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  border: 1px solid #cad6e5;
  border-radius: 8px;
  background: #f4f7fb;
  color: #607087;
  padding: 0 10px;
  font-size: 11px;
  font-weight: 750;
  white-space: nowrap;
}

.voucher-state.waiting { border-color: #ead39c; background: #fff9e9; color: #84611b; }
.voucher-state.ready { border-color: #aad8c0; background: #f1faf5; color: #1d744a; }
.voucher-state.inactive { border-color: #d5dce5; background: #f5f7f9; color: #6d7888; }

.voucher-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(270px, 0.88fr);
  gap: 20px;
  align-items: stretch;
  padding: 22px 24px 20px;
}

.voucher-controls {
  min-width: 0;
  align-self: center;
}

.voucher-control-footer {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 15px;
}

.voucher-control-footer p {
  margin: 0;
  color: #65758b;
  font-size: 10px;
  line-height: 1.6;
}

.voucher-fill-button {
  flex: 0 0 auto;
  min-height: 39px;
  border: 1px solid #a8bfdc;
  border-radius: 8px;
  background: #fff;
  color: #285a98;
  padding: 0 14px;
  font-size: 11px;
  font-weight: 750;
  transition: border-color 130ms ease, background-color 130ms ease, color 130ms ease, transform 100ms ease;
}

.voucher-fill-button:hover { border-color: #2c68b7; background: #f4f8fd; color: #174c8c; }
.voucher-fill-button:disabled { cursor: not-allowed; border-color: #d9e1eb; background: #f4f6f9; color: #929eae; }

.voucher-result-card {
  min-width: 0;
  border: 1px solid #c7d9ef;
  border-left: 3px solid #2c68b7;
  border-radius: 10px;
  background: #f3f8ff;
  padding: 17px 18px 15px;
}

.voucher-result-label {
  margin: 0;
  color: #516985;
  font-size: 11px;
  font-weight: 750;
}

.voucher-result-card > strong {
  display: block;
  margin-top: 7px;
  color: #0759bb;
  font-family: "Bahnschrift", "Microsoft YaHei UI", sans-serif;
  font-size: clamp(28px, 3vw, 38px);
  line-height: 1.05;
  letter-spacing: -0.045em;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.voucher-formula {
  min-height: 34px;
  margin: 8px 0 12px;
  color: #526b89;
  font-size: 10px;
  line-height: 1.55;
}

.voucher-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 15px;
  margin: 0;
  border-top: 1px solid #cfdef0;
  padding-top: 9px;
}

.voucher-metrics div { min-width: 0; padding: 5px 0; }
.voucher-metrics dt { color: #6c7c91; font-size: 9px; line-height: 1.4; }
.voucher-metrics dd {
  margin: 3px 0 0;
  color: #263b57;
  font-family: "Bahnschrift", "Microsoft YaHei UI", sans-serif;
  font-size: 13px;
  font-weight: 750;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.voucher-example {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 14px;
  margin: 0 24px;
  border-top: 1px solid #e4ebf4;
  padding: 17px 0;
}

.voucher-example strong { color: #314967; font-size: 11px; }
.voucher-example p,
.voucher-note { color: #627289; font-size: 10px; line-height: 1.7; }
.voucher-example p { margin: 0; }
.voucher-note {
  margin: 0;
  border-top: 1px solid #e7edf5;
  background: var(--surface-soft);
  padding: 12px 24px 13px;
}

.result-panel {
  position: sticky;
  top: 90px;
  overflow: hidden;
  border-top: 3px solid var(--accent-dark);
  box-shadow: 0 18px 46px rgba(35, 65, 104, 0.12);
}

.result-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 0;
  border-bottom: 1px solid #e7ecf3;
  background: var(--surface-soft);
  color: #4e5e77;
  padding: 16px 20px;
  font-size: 12px;
  font-weight: 750;
}

.result-label time {
  color: var(--subtle);
  font: 500 9px/1.4 ui-monospace, SFMono-Regular, Consolas, monospace;
  white-space: nowrap;
}

.result-empty {
  min-height: 260px;
  display: grid;
  place-content: center;
  padding: 24px;
  text-align: center;
  color: var(--subtle);
}

.result-empty strong { margin-bottom: 7px; color: #41516a; font-size: 17px; }
.result-empty span { font-size: 12px; }
#resultContent { padding: 20px; }

.total-row { display: flex; align-items: baseline; justify-content: space-between; gap: 14px; }
.total-row span { color: #4f5f77; font-size: 13px; font-weight: 700; }
.total-row strong {
  color: var(--accent-dark);
  font-family: "Bahnschrift", "Microsoft YaHei UI", sans-serif;
  font-size: 36px;
  line-height: 1;
  letter-spacing: -0.045em;
  font-variant-numeric: tabular-nums;
}

.total-hint { margin: 8px 0 16px; color: #68778c; text-align: right; font-size: 11px; }

.discount-panel {
  margin-bottom: 16px;
  border: 1px solid #cadcf3;
  border-radius: 11px;
  background: var(--accent-soft);
  padding: 14px;
}

.price-reference-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-bottom: 1px solid #d5e3f4;
  padding-bottom: 14px;
}

.price-reference { min-width: 0; padding: 2px 2px 1px; }
.price-reference + .price-reference { border-left: 1px solid #d5e3f4; padding-left: 13px; }
.price-reference span { color: #53677f; font-size: 12px; font-weight: 700; }
.discount-stat span,
.discount-control > span:first-child { color: #5f7089; font-size: 11px; }
.price-reference strong {
  display: block;
  margin-top: 7px;
  color: #203a60;
  font-family: "Bahnschrift", "Microsoft YaHei UI", sans-serif;
  font-size: 22px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.025em;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.price-reference + .price-reference strong { color: var(--accent-dark); }

.discount-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 116px;
  gap: 14px;
  align-items: end;
  margin-top: 13px;
}

.discount-stat strong {
  display: block;
  margin-top: 7px;
  color: var(--accent-dark);
  font-family: "Bahnschrift", "Microsoft YaHei UI", sans-serif;
  font-size: 21px;
  font-variant-numeric: tabular-nums;
}

.discount-control > span:first-child { margin-bottom: 6px; font-weight: 700; }
.discount-input input { height: 38px; padding-right: 34px; background: #fff; font-weight: 750; font-variant-numeric: tabular-nums; }
.discount-input b { right: 10px; }

.discount-presets {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 6px;
  margin-top: 12px;
}

.discount-presets button {
  min-height: 36px;
  border: 1px solid #c5d8f0;
  border-radius: 7px;
  background: #fff;
  color: #31537f;
  padding: 0 4px;
  font-size: 11px;
  font-weight: 700;
  white-space: nowrap;
}

.discount-presets button:hover,
.discount-presets button.active { border-color: var(--accent-dark); background: var(--accent-dark); color: #fff; }

.discount-reset {
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  margin-top: 9px;
  border: 0;
  background: transparent;
  color: var(--accent-dark);
  padding: 3px 0;
  font-size: 11px;
  font-weight: 700;
}

.discount-reset:hover { color: var(--accent); text-decoration: underline; }

.price-breakdown {
  border-top: 1px solid #e3e9f1;
  border-bottom: 1px solid #e3e9f1;
  padding: 7px 0;
}

.price-line { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; padding: 7px 0; font-size: 12px; }
.price-line span { color: #5c6a80; }
.price-line strong { color: #28384f; font-variant-numeric: tabular-nums; }
.price-line del { margin-right: 7px; color: #94a0b0; font-size: 10px; }

.quote-facts { margin: 14px 0; font-size: 11px; }
.quote-facts div { display: grid; grid-template-columns: 58px minmax(0, 1fr); gap: 9px; padding: 4px 0; }
.quote-facts dt { color: #68778d; }
.quote-facts dd { margin: 0; color: #405069; text-align: right; overflow-wrap: anywhere; }

.copy-button { width: 100%; border: 1px solid var(--accent-dark); background: var(--accent-dark); color: #fff; }
.copy-button:hover { border-color: #0049ad; background: #0049ad; }
.copy-status {
  min-height: 17px;
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.5;
  text-align: center;
}
.copy-status.success { color: #25734d; }
.copy-status.error { color: var(--danger); }

.copy-fallback {
  margin-top: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  background: var(--surface-soft);
  padding: 11px;
}

.copy-fallback label {
  display: block;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
}

.copy-fallback textarea {
  width: 100%;
  min-height: 138px;
  resize: vertical;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background: var(--surface);
  color: var(--ink);
  padding: 10px;
  font: 11px/1.65 ui-monospace, SFMono-Regular, Consolas, monospace;
}

.select-copy-button {
  width: 100%;
  min-height: 40px;
  margin-top: 8px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background: var(--surface);
  color: var(--ink);
  font-size: 11px;
  font-weight: 750;
}

.select-copy-button:hover { border-color: var(--accent); color: var(--accent-dark); }
.request-id { margin: 10px 0 0; color: #708096; font: 9px/1.5 ui-monospace, SFMono-Regular, Consolas, monospace; overflow-wrap: anywhere; }

.result-error {
  margin: 18px 20px;
  border: 1px solid #edc1c1;
  border-radius: var(--radius-control);
  background: #fff4f4;
  color: var(--danger);
  padding: 12px;
  font-size: 12px;
  line-height: 1.6;
}

.service-contact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid #e7ecf3;
  background: var(--surface);
  padding: 14px 20px;
}

.service-contact strong,
.service-contact span { display: block; }
.service-contact strong { color: #33445e; font-size: 12px; }
.service-contact span { margin-top: 3px; color: #7d899b; font-size: 10px; }
.service-contact a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: var(--accent-dark);
  font-family: "Bahnschrift", "Microsoft YaHei UI", sans-serif;
  font-size: 18px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.015em;
  text-decoration: none;
  white-space: nowrap;
}

.service-contact a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.service-contact a:focus-visible { outline: 3px solid rgba(0, 110, 255, 0.22); outline-offset: 2px; }

.security-note {
  margin: 0;
  border-top: 1px solid #e7ecf3;
  background: var(--surface-soft);
  color: #65748a;
  padding: 14px 20px;
  font-size: 10px;
  line-height: 1.6;
}

@media (max-width: 1120px) {
  .workspace { grid-template-columns: minmax(0, 1fr) 340px; }
  .field-grid.compact-filters { grid-template-columns: 110px 110px minmax(0, 1fr); }
  .field-grid.compact-filters .wide { grid-column: 1 / -1; }
  .voucher-layout { grid-template-columns: 1fr; }
}

@media (max-width: 960px) {
  .workspace { grid-template-columns: 1fr; }
  .result-panel { position: static; }
  .field-grid.compact-filters { grid-template-columns: 100px 100px minmax(160px, 0.65fr) minmax(280px, 1.4fr); }
  .field-grid.compact-filters .wide { grid-column: auto; }
}

@media (max-width: 720px) {
  .topbar-inner,
  .page-shell { width: min(100% - 28px, 1480px); }
  .topbar-inner { min-height: 64px; gap: 10px; }
  h1 { font-size: 17px; }
  .brand { font-size: 9px; }
  .api-state { min-height: 30px; max-width: 142px; overflow: hidden; text-overflow: ellipsis; padding: 0 9px; }
  .page-shell { padding-top: 20px; }
  .intro { align-items: stretch; flex-direction: column; gap: 15px; }
  .intro h2 { font-size: 24px; }
  .token-field { width: 100%; }
  fieldset { padding: 20px 18px 21px; }
  .field-grid.two,
  .field-grid.three,
  .field-grid.four,
  .field-grid.compact-filters { grid-template-columns: 1fr; }
  .field-grid.compact-filters .wide { grid-column: auto; }
  .form-actions { padding: 16px 18px 18px; }
  .form-actions button { flex: 1; padding-inline: 10px; }
  .voucher-heading { padding: 19px 18px 17px; }
  .voucher-layout { padding: 20px 18px 18px; }
  .voucher-control-footer { align-items: stretch; flex-direction: column; }
  .voucher-fill-button { width: 100%; }
  .voucher-example { grid-template-columns: 1fr; gap: 6px; margin-inline: 18px; }
  .voucher-note { padding-inline: 18px; }
  .result-label { padding-inline: 18px; }
  #resultContent { padding: 18px; }
  .service-contact { padding-inline: 18px; }
  .security-note { padding-inline: 18px; }
}

@media (max-width: 420px) {
  .voucher-heading { align-items: stretch; flex-direction: column; gap: 13px; }
  .voucher-state { align-self: flex-start; }
  .voucher-metrics { grid-template-columns: 1fr; }
  .total-row strong { font-size: 32px; }
  .discount-grid { grid-template-columns: minmax(0, 1fr) 108px; gap: 10px; }
  .price-reference-grid { gap: 9px; }
  .price-reference + .price-reference { padding-left: 9px; }
  .price-reference strong { font-size: 20px; }
  .service-contact { gap: 10px; }
  .service-contact a { font-size: 16px; }
  .discount-presets { gap: 5px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}