:root {
  --bg: #0b1020;
  --panel: #121833;
  --panel2: #1a2247;
  --border: #283166;
  --text: #e7ecff;
  --muted: #8b93c2;
  --accent: #6ea8ff;
  --accent2: #8affcf;
  --danger: #ff6b8a;
  --ok: #37d399;
  --warn: #ffc857;
  --shadow: 0 10px 30px rgba(0, 0, 0, .35);
  --radius: 14px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f7ff;
    --panel: #ffffff;
    --panel2: #f0f3ff;
    --border: #dce1ff;
    --text: #17203d;
    --muted: #5a6388;
    --accent: #3b66ff;
    --accent2: #00b477;
    --shadow: 0 10px 30px rgba(20, 30, 80, .08);
  }
}

* {
  box-sizing: border-box
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft Yahei", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased
}

a {
  color: var(--accent);
  text-decoration: none
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px 18px 80px
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
  flex-wrap: wrap
}

header h1 {
  margin: 0;
  font-size: 22px;
  letter-spacing: .5px
}

header .sub {
  color: var(--muted);
  font-size: 13px;
  margin-top: 4px
}

nav.modules {
  display: flex;
  gap: 8px;
  flex-wrap: wrap
}

nav.modules a {
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text);
  font-size: 13px;
  cursor: pointer
}

nav.modules a.active {
  background: var(--accent);
  color: #fff;
  border-color: transparent
}

.grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1.1fr 1fr
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow)
}

.card h2 {
  margin: 0 0 16px;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-weight: 600;
  letter-spacing: .3px;
  text-transform: uppercase
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px
}

.row.triple {
  grid-template-columns: 1fr 1fr 1fr
}

.row+.row {
  margin-top: 14px
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0
}

.field label {
  font-size: 12.5px;
  color: var(--muted);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  line-height: 1.3;
  min-height: 18px
}

.field .hint {
  font-size: 11.5px;
  color: var(--muted);
  opacity: .85;
  line-height: 1.4
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 11px 13px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel2);
  color: var(--text);
  font: inherit;
  outline: none;
  transition: border-color .15s, box-shadow .15s, background .15s;
  -webkit-appearance: none;
  appearance: none
}

.field input[type=number] {
  font-variant-numeric: tabular-nums
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(110, 168, 255, .2)
}

.field.readonly input {
  background: transparent;
  border-style: dashed;
  color: var(--accent2);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .5px
}

.field.primary input {
  background: linear-gradient(180deg, rgba(255, 200, 87, .18), rgba(255, 200, 87, .08));
  border-color: rgba(255, 200, 87, .55);
  color: var(--warn);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .5px
}

.field.primary input:focus {
  border-color: var(--warn);
  box-shadow: 0 0 0 3px rgba(255, 200, 87, .22)
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 6px;
  font-size: 14px
}

th,
td {
  padding: 11px 10px;
  text-align: right;
  border-bottom: 1px dashed var(--border)
}

th:first-child,
td:first-child {
  text-align: left
}

th {
  color: var(--muted);
  font-weight: 600;
  font-size: 11.5px;
  letter-spacing: .3px;
  text-transform: uppercase
}

tr.anchor td {
  background: linear-gradient(90deg, rgba(110, 168, 255, .14), transparent);
  font-weight: 600
}

.kbd {
  font: 11px/1 ui-monospace, Consolas, monospace;
  padding: 3px 6px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel2);
  color: var(--muted);
  white-space: nowrap
}

.var {
  display: inline-block;
  font: 11px/1 ui-monospace, Consolas, monospace;
  padding: 3px 7px;
  border-radius: 6px;
  background: rgba(110, 168, 255, .16);
  color: var(--accent);
  border: 1px solid rgba(110, 168, 255, .28);
  white-space: nowrap
}

footer {
  margin-top: 30px;
  color: var(--muted);
  font-size: 12px;
  text-align: center
}

details summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 13px;
  padding: 6px 0
}

details summary:hover {
  color: var(--text)
}

details[open] summary {
  margin-bottom: 10px
}

.mono {
  font-variant-numeric: tabular-nums
}

/* —— Buttons —— */
.btn {
  padding: 9px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel2);
  color: var(--text);
  font: inherit;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap
}

.btn:hover {
  border-color: var(--accent);
  color: var(--accent)
}

.btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
  font-weight: 600
}

.btn.primary:hover {
  filter: brightness(1.1);
  color: #fff
}

.btn.danger {
  background: transparent;
  border-color: var(--danger);
  color: var(--danger)
}

.btn.danger:hover {
  background: var(--danger);
  color: #fff
}

.btn.sm {
  padding: 5px 11px;
  font-size: 12.5px
}

/* —— View switching —— */
.view {
  display: none
}

.view.active {
  display: block
}

/* —— Order tracker styles —— */
.ot-setup {
  max-width: 640px;
  margin: 0 auto
}

.ot-setup ol {
  color: var(--muted);
  padding-left: 22px;
  margin: 0 0 16px;
  line-height: 1.9
}

.ot-setup code {
  background: var(--panel2);
  padding: 2px 7px;
  border-radius: 5px;
  color: var(--warn);
  font: 12px/1.4 ui-monospace, Consolas, monospace;
  border: 1px solid var(--border)
}

.ot-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px
}

.ot-bar .left {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 12.5px
}

.ot-bar .right {
  display: flex;
  gap: 8px;
  flex-wrap: wrap
}

.sync {
  font-size: 12px;
  color: var(--muted)
}

.sync.saving {
  color: var(--warn)
}

.sync.saved {
  color: var(--ok)
}

.sync.error {
  color: var(--danger)
}

/* —— Account tabs —— */
.ot-acc-tabs {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border)
}

.ot-acc-tabs .tab {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel2);
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap
}

.ot-acc-tabs .tab:hover {
  border-color: var(--accent);
  color: var(--accent)
}

.ot-acc-tabs .tab.active {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
  font-weight: 600
}

.ot-acc-tabs .tab-actions {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  background: var(--panel2);
  display: flex;
  align-items: center;
  padding: 0 8px 0 10px;
  gap: 2px;
  opacity: 0;
  transform: translateX(5px);
  pointer-events: none;
  transition: all .15s;
  mask-image: linear-gradient(to right, transparent, black 10px);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10px);
}
.ot-acc-tabs .tab.active .tab-actions {
  background: var(--accent);
}

.ot-acc-tabs .tab:hover .tab-actions {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
  transition-delay: 0.1s;
}

.ot-acc-tabs .tab-actions .t-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  font-size: 11px;
  color: var(--muted);
  transition: all .15s;
}

.ot-acc-tabs .tab.active .tab-actions .t-btn {
  color: rgba(255, 255, 255, .7);
}

.ot-acc-tabs .tab-actions .t-btn:hover {
  background: rgba(110, 168, 255, .15);
  color: var(--accent);
}
.ot-acc-tabs .tab.active .tab-actions .t-btn:hover {
  background: rgba(255, 255, 255, .25);
  color: #fff;
}

.ot-acc-tabs .tab-actions .t-btn.danger:hover {
  background: rgba(255, 107, 138, .15);
  color: var(--danger);
}
.ot-acc-tabs .tab.active .tab-actions .t-btn.danger:hover {
  background: rgba(255, 255, 255, .25);
  color: #fff;
}

.ot-acc-tabs .tab-add {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px dashed var(--border);
  background: transparent;
  color: var(--muted);
  font-size: 16px;
  cursor: pointer;
  transition: all .15s
}

.ot-acc-tabs .tab-add:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(110,168,255,.08)
}

.ot-acc-tabs .tab-count {
  font-size: 10.5px;
  opacity: .7;
  margin-left: 2px
}

/* —— Order table —— */
.ot-table-wrap {
  overflow-x: auto;
  margin: 0 -20px;
  padding: 0 20px
}

table.ot {
  min-width: 1100px;
  font-size: 13px
}

table.ot th,
table.ot td {
  text-align: center;
  padding: 10px 8px;
  white-space: nowrap;
  vertical-align: middle
}

table.ot td.actions {
  white-space: nowrap
}

table.ot tbody tr:hover {
  background: rgba(110, 168, 255, .05)
}

.chip {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 600;
  white-space: nowrap;
  border: 1px solid transparent
}

.chip.ok {
  background: rgba(55, 211, 153, .15);
  color: var(--ok);
  border-color: rgba(55, 211, 153, .35)
}

.chip.warn {
  background: rgba(255, 200, 87, .15);
  color: var(--warn);
  border-color: rgba(255, 200, 87, .4)
}

.chip.danger {
  background: rgba(255, 107, 138, .15);
  color: var(--danger);
  border-color: rgba(255, 107, 138, .4)
}

.chip.info {
  background: rgba(110, 168, 255, .16);
  color: var(--accent);
  border-color: rgba(110, 168, 255, .35)
}

.chip.muted {
  background: var(--panel2);
  color: var(--muted);
  border-color: var(--border)
}

.ot-empty {
  padding: 60px 20px;
  text-align: center;
  color: var(--muted)
}

.ot-empty svg {
  opacity: .5;
  margin-bottom: 12px
}

/* —— Modal —— */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(5, 8, 24, .7);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px
}

.modal-mask.show {
  display: flex
}

.modal {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 720px;
  max-height: 92vh;
  overflow: auto;
  padding: 24px;
  box-shadow: var(--shadow)
}

.modal h3 {
  margin: 0 0 16px;
  font-size: 16px
}

.modal .row {
  grid-template-columns: 1fr 1fr
}

.modal .full {
  grid-column: 1/-1
}

.modal .actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 20px
}

/* —— Toast —— */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 13px;
  z-index: 200;
  display: none;
  box-shadow: var(--shadow)
}

.toast.show {
  display: block;
  animation: fadeIn .2s ease-out
}

.toast.error {
  border-color: var(--danger);
  color: var(--danger)
}

.toast.ok {
  border-color: var(--ok);
  color: var(--ok)
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translate(-50%, 10px)
  }

  to {
    opacity: 1;
    transform: translate(-50%, 0)
  }
}

/* —— 公式展示卡片（高级版） —— */
.formula-card {
  margin-top: 18px;
  background:
    radial-gradient(600px 200px at 0% 0%, rgba(110, 168, 255, .10), transparent 60%),
    radial-gradient(500px 200px at 100% 100%, rgba(138, 255, 207, .08), transparent 60%),
    var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 28px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden
}

.formula-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--accent), var(--accent2))
}

.formula-card h2 {
  margin: 0 0 20px;
  font-size: 12px;
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase
}

.formula-list {
  display: flex;
  flex-direction: column;
  gap: 14px
}

.formula-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  border-radius: 12px;
  background: var(--panel2);
  border: 1px solid var(--border);
  transition: all .2s
}

.formula-item:hover {
  border-color: var(--accent);
  transform: translateX(2px)
}

.formula-step {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font: 700 13px/1 ui-monospace, Consolas, monospace;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #0b1020
}

.formula-eq {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font: 500 15px/1.6 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color: var(--text);
  font-variant-numeric: tabular-nums
}

.formula-eq .lhs {
  color: var(--accent2);
  font-weight: 700
}

.formula-eq .op {
  color: var(--muted);
  padding: 0 2px
}

.formula-eq .paren {
  color: var(--muted)
}

.formula-eq .num {
  color: var(--warn)
}

.formula-eq .var {
  display: inline-block;
  font: 12px/1 ui-monospace, Consolas, monospace;
  padding: 4px 9px;
  border-radius: 6px;
  background: rgba(110, 168, 255, .16);
  color: var(--accent);
  border: 1px solid rgba(110, 168, 255, .32)
}

/* —— 运费参考表 —— */
.ship-ref {
  margin-top: 18px
}

.ship-ref .ship-meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
  padding: 12px 14px;
  background: var(--panel2);
  border: 1px dashed var(--border);
  border-radius: 10px;
  font-size: 12.5px;
  color: var(--muted)
}

.ship-ref .ship-meta b {
  color: var(--text);
  font-weight: 600
}

.ship-ref .ship-meta .sep {
  opacity: .4
}

table.ship {
  width: 100%;
  font-size: 13.5px
}

table.ship th,
table.ship td {
  text-align: center;
  padding: 11px 8px;
  white-space: nowrap
}

table.ship thead th {
  background: var(--panel2);
  color: var(--muted);
  font-weight: 600;
  font-size: 11.5px;
  letter-spacing: .4px;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border)
}

table.ship tbody tr:nth-child(even) td {
  background: rgba(110, 168, 255, .04)
}

table.ship tbody tr:hover td {
  background: rgba(110, 168, 255, .10)
}

table.ship td.w {
  color: var(--warn);
  font-weight: 700
}

table.ship td.actual {
  color: #f87171;
  font-weight: 600;
  text-shadow: 0 0 12px rgba(248, 113, 113, .25)
}

/* —— 订单跟踪器 · 账号下拉历史 —— */
.acc-wrap {
  position: relative
}

.acc-dropdown {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  margin-top: 4px;
  z-index: 50;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  max-height: 220px;
  overflow: auto;
  display: none
}

.acc-dropdown.show {
  display: block
}

.acc-dropdown .empty {
  padding: 12px 14px;
  color: var(--muted);
  font-size: 12.5px
}

.acc-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  cursor: pointer;
  font-size: 13.5px;
  border-bottom: 1px solid var(--border)
}

.acc-item:last-child {
  border-bottom: 0
}

.acc-item:hover {
  background: var(--panel2);
  color: var(--accent)
}

.acc-item .del {
  opacity: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1;
  padding: 2px 6px;
  border-radius: 4px
}

.acc-item:hover .del {
  opacity: 1
}

.acc-item .del:hover {
  background: rgba(255, 107, 138, .2);
  color: var(--danger)
}

/* —— 订单跟踪器 · 公式说明块 —— */
.ot-formula {
  margin-bottom: 16px;
  padding: 16px 18px;
  background: var(--panel2);
  border: 1px dashed var(--border);
  border-radius: 12px
}

.ot-formula .title {
  font-size: 11.5px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  margin-bottom: 10px
}

.ot-formula .f-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 6px 0;
  flex-wrap: wrap;
  font: 13px/1.6 ui-monospace, Consolas, monospace;
  color: var(--text)
}

.ot-formula .f-row .k {
  color: var(--text);
  font-weight: 600;
}

.ot-formula .f-row .op {
  color: var(--muted)
}

.f-rules-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
  font: 11.5px/1 ui-monospace, Consolas, monospace;
}

.f-rules-grid .rule {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--panel);
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.f-rules-grid .cond {
  color: var(--text);
  white-space: nowrap
}

.f-rules-grid .arrow {
  color: var(--muted)
}

.f-rules-grid .result {
  color: var(--muted);
  white-space: nowrap
}

/* —— 响应式：平板 —— */
@media (max-width:860px) {
  .grid {
    grid-template-columns: 1fr
  }
}

/* —— 响应式：手机 —— */
@media (max-width:640px) {
  .wrap {
    padding: 18px 14px 60px
  }

  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px
  }

  header h1 {
    font-size: 19px
  }

  header .sub {
    font-size: 12px
  }

  nav.modules {
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 2px
  }

  nav.modules a {
    flex: 0 0 auto;
    font-size: 12px;
    padding: 6px 11px
  }

  .card {
    padding: 16px;
    border-radius: 12px
  }

  .card h2 {
    font-size: 13px;
    margin-bottom: 14px
  }

  .row,
  .row.triple {
    grid-template-columns: 1fr;
    gap: 12px
  }

  .modal .row {
    grid-template-columns: 1fr
  }

  .row+.row {
    margin-top: 12px
  }

  .field input,
  .field select,
  .field textarea {
    padding: 12px 13px;
    font-size: 16px
  }

  .field.readonly input,
  .field.primary input {
    font-size: 19px
  }

  table {
    font-size: 13px
  }

  th,
  td {
    padding: 9px 6px
  }

  th {
    font-size: 10.5px
  }

  .ot-table-wrap {
    margin: 0 -16px;
    padding: 0 16px
  }

  .formula-card {
    padding: 18px
  }

  .formula-item {
    padding: 12px 14px;
    gap: 10px
  }

  .formula-eq {
    font-size: 13px
  }

  .ot-formula .f-rule {
    margin-left: 0
  }

  .ship-ref {
    overflow-x: auto;
    margin: 18px -16px 0;
    padding: 0 16px
  }

  table.ship {
    min-width: 640px
  }
}