/* CodingPlan 决策工具：套餐选择器 + 额度计算器 */
:root {
  --bg-deep: #06080d;
  --bg-card: #0c1017;
  --bg-card-hover: #111822;
  --bg-surface: #151c28;
  --border: #1a2332;
  --border-bright: #2a3a52;
  --text-primary: #e8edf5;
  --text-secondary: #8899b0;
  --text-muted: #556677;
  --accent-cyan: #00d4ff;
  --accent-green: #00ff88;
  --accent-orange: #ff8a00;
  --accent-pink: #ff3d8e;
  --radius: 12px;
  --radius-lg: 20px;
  --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
}

[data-theme='light'] {
  --bg-deep: #f5f7fa;
  --bg-card: #fff;
  --bg-card-hover: #f0f2f5;
  --bg-surface: #eef1f5;
  --border: #dde1e8;
  --border-bright: #c5ccd6;
  --text-primary: #1a1f2e;
  --text-secondary: #5a6578;
  --text-muted: #5f6b7d;
  --accent-cyan: #006f99;
  --accent-green: #087f45;
  --accent-orange: #d97706;
  --accent-pink: #e0336b;
}

.finder-section {
  padding: 80px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(circle at 15% 20%, rgba(0, 212, 255, .08), transparent 30%),
    var(--bg-card);
}

.decision-tool,
.decision-page {
  color: var(--text-primary);
  font-family: var(--font-sans);
}

.dt-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 36px;
}

.dt-heading h2,
.decision-page h1,
.decision-page h2,
.decision-page h3,
.decision-page p {
  margin-top: 0;
}

.dt-heading h2 {
  margin: 8px 0 10px;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  line-height: 1.2;
  letter-spacing: -.025em;
}

.dt-heading p {
  max-width: 760px;
  margin: 0;
  color: var(--text-secondary);
}

.dt-kicker {
  color: var(--accent-cyan);
  font: 700 .75rem/1 var(--font-mono);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.dt-method-link,
.dt-primary-link,
.dt-secondary-link {
  text-decoration: none;
}

.dt-method-link {
  flex: 0 0 auto;
  color: var(--accent-cyan);
  font-size: .86rem;
}

.finder-form {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--bg-deep) 82%, transparent);
}

.finder-field {
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-surface);
}

.finder-field label {
  display: block;
  margin-bottom: 10px;
  color: var(--text-primary);
  font-size: .86rem;
  font-weight: 700;
}

.finder-field label span {
  margin-right: 7px;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
}

.finder-field select,
.quota-form select,
.quota-form input {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--border-bright);
  border-radius: 8px;
  background: var(--bg-card);
  color: var(--text-primary);
  padding: 9px 11px;
  font: inherit;
}

.finder-field select:focus,
.quota-form select:focus,
.quota-form input:focus,
.dt-primary-button:focus-visible,
.dt-primary-link:focus-visible,
.dt-secondary-link:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

/* 自定义选择框：避免 Windows 原生下拉菜单破坏整体视觉。 */
.dt-select {
  position: relative;
  width: 100%;
}

.dt-select.is-open { z-index: 60; }

.dt-native-select {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  margin: -1px !important;
  padding: 0 !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  clip-path: inset(50%) !important;
  border: 0 !important;
  opacity: 0 !important;
  pointer-events: none !important;
  white-space: nowrap !important;
}

.dt-select-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--border-bright);
  border-radius: 10px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--bg-card) 92%, white 8%), var(--bg-card));
  color: var(--text-primary);
  padding: 10px 14px;
  cursor: pointer;
  font: 500 .9rem/1.35 var(--font-sans);
  text-align: left;
  transition: border-color .18s, box-shadow .18s, background .18s, transform .18s;
}

.dt-select-trigger:hover {
  border-color: color-mix(in srgb, var(--accent-cyan) 54%, var(--border-bright));
  background: var(--bg-card-hover);
}

.dt-select-trigger:focus-visible,
.dt-select.is-open .dt-select-trigger {
  border-color: var(--accent-cyan);
  outline: 0;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-cyan) 18%, transparent);
}

.dt-select-value {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dt-select-chevron {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin: -4px 3px 0 0;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
  transition: transform .2s, border-color .2s;
}

.dt-select.is-open .dt-select-chevron {
  margin-top: 4px;
  border-color: var(--accent-cyan);
  transform: rotate(225deg);
}

.dt-select-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  left: 0;
  max-height: 286px;
  overflow-y: auto;
  border: 1px solid color-mix(in srgb, var(--accent-cyan) 30%, var(--border));
  border-radius: 12px;
  background: color-mix(in srgb, var(--bg-card) 96%, transparent);
  padding: 6px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, .24), 0 2px 8px rgba(0, 0, 0, .12);
  backdrop-filter: blur(18px);
  animation: dt-select-in .16s ease-out;
}

.dt-select-menu[hidden] { display: none; }

.dt-select-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  min-height: 42px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text-secondary);
  padding: 9px 11px;
  cursor: pointer;
  font: 500 .84rem/1.35 var(--font-sans);
  text-align: left;
  transition: background .14s, color .14s, transform .14s;
}

.dt-select-option:hover,
.dt-select-option:focus-visible {
  outline: 0;
  background: color-mix(in srgb, var(--accent-cyan) 10%, var(--bg-surface));
  color: var(--text-primary);
}

.dt-select-option[aria-selected='true'] {
  background: color-mix(in srgb, var(--accent-cyan) 15%, var(--bg-surface));
  color: var(--accent-cyan);
  font-weight: 700;
}

.dt-select-option:disabled {
  cursor: not-allowed;
  opacity: .45;
}

.dt-select-check {
  flex: 0 0 auto;
  color: var(--accent-cyan);
  opacity: 0;
  transform: scale(.7);
  transition: opacity .14s, transform .14s;
}

.dt-select-option[aria-selected='true'] .dt-select-check {
  opacity: 1;
  transform: scale(1);
}

@keyframes dt-select-in {
  from { opacity: 0; transform: translateY(-5px) scale(.985); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.finder-field small,
.quota-field small {
  display: block;
  margin-top: 9px;
  color: var(--text-muted);
  font-size: .72rem;
  line-height: 1.55;
}

.dt-primary-button {
  grid-column: 1 / -1;
  min-height: 48px;
  border: 0;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent-cyan), #0099cc);
  color: #061018;
  cursor: pointer;
  font: 800 .92rem/1 var(--font-sans);
  transition: transform .2s, filter .2s;
}

.dt-primary-button:hover {
  transform: translateY(-1px);
  filter: brightness(1.08);
}

.finder-results {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 22px;
}

.dt-empty-state {
  grid-column: 1 / -1;
  padding: 28px;
  border: 1px dashed var(--border-bright);
  border-radius: var(--radius);
  color: var(--text-muted);
  text-align: center;
}

.finder-result-card {
  position: relative;
  overflow: hidden;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
}

.finder-result-card.is-primary {
  border-color: color-mix(in srgb, var(--accent-cyan) 58%, var(--border));
  box-shadow: 0 0 34px rgba(0, 212, 255, .08);
}

.finder-result-label {
  display: inline-flex;
  margin-bottom: 18px;
  border-radius: 100px;
  background: rgba(0, 212, 255, .1);
  color: var(--accent-cyan);
  padding: 4px 10px;
  font: 700 .68rem/1.4 var(--font-mono);
  letter-spacing: .06em;
}

.finder-result-topline {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
}

.finder-result-topline h3 {
  margin: 0 0 4px;
  font-size: 1.35rem;
}

.finder-result-topline p,
.finder-commercial-note {
  margin: 0;
  color: var(--text-muted);
  font-size: .76rem;
}

.dt-status {
  flex: 0 0 auto;
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 4px 9px;
  font-size: .68rem;
}

.dt-status-available { color: var(--accent-green); }
.dt-status-limited { color: var(--accent-orange); }
.dt-status-sold-out { color: var(--accent-pink); }

.finder-result-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 22px 0;
}

.finder-result-columns h4 {
  margin: 0 0 9px;
  color: var(--text-secondary);
  font-size: .75rem;
  letter-spacing: .04em;
}

.finder-result-columns ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.finder-result-columns li {
  position: relative;
  padding: 5px 0 5px 14px;
  color: var(--text-secondary);
  font-size: .79rem;
  line-height: 1.55;
}

.finder-result-columns li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--accent-green);
  font-weight: 900;
}

.finder-risk li::before { color: var(--accent-orange); }

.finder-result-actions {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

.dt-primary-link,
.dt-secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border-radius: 8px;
  padding: 8px 15px;
  font-size: .8rem;
  font-weight: 700;
}

.dt-primary-link {
  background: var(--accent-cyan);
  color: #061018;
}

.dt-secondary-link {
  border: 1px solid var(--border-bright);
  color: var(--text-secondary);
}

.dt-disclosure {
  margin: 18px 0 0;
  color: var(--text-muted);
  font-size: .72rem;
  line-height: 1.7;
  text-align: center;
}

/* 独立额度计算器页面 */
.decision-page {
  min-height: 100vh;
  margin: 0;
  background: var(--bg-deep);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.decision-page *,
.decision-page *::before,
.decision-page *::after { box-sizing: border-box; }

.decision-page a { color: inherit; }

.decision-page .container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.decision-header {
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-deep) 90%, transparent);
}

.decision-nav {
  display: flex;
  min-height: 64px;
  align-items: center;
  justify-content: space-between;
}

.decision-logo {
  color: var(--accent-cyan) !important;
  font: 700 1rem/1 var(--font-mono);
  text-decoration: none;
}

.decision-nav-links {
  display: flex;
  gap: 22px;
}

.decision-nav-links a {
  color: var(--text-secondary);
  font-size: .82rem;
  text-decoration: none;
}

.decision-theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
}

.decision-theme-toggle:hover { color: var(--text-primary); }

.quota-hero {
  padding: 56px 0 32px;
  background: radial-gradient(circle at 50% 0, rgba(0, 212, 255, .09), transparent 46%);
  text-align: center;
}

.quota-hero h1 {
  max-width: 980px;
  margin: 12px auto 18px;
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -.04em;
}

.quota-hero p {
  max-width: 720px;
  margin: 0 auto;
  color: var(--text-secondary);
}

.quota-section { padding: 44px 0; }
.quota-section.is-surface {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
}

.quota-section-heading {
  margin-bottom: 26px;
}

.quota-section-heading h2 {
  margin-bottom: 8px;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

.quota-section-heading p {
  color: var(--text-secondary);
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.evidence-card {
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-surface);
}

.evidence-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: .95rem;
}

.evidence-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: .82rem;
}

.evidence-official { border-top: 3px solid var(--accent-cyan); }
.evidence-derived { border-top: 3px solid var(--accent-orange); }
.evidence-observed { border-top: 3px solid var(--accent-green); }

.quota-workbench {
  display: grid;
  grid-template-columns: minmax(280px, .8fr) minmax(0, 1.2fr);
  gap: 20px;
}

.quota-form,
.quota-output {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
}

.quota-fields {
  display: grid;
  gap: 16px;
}

.quota-field label {
  display: block;
  margin-bottom: 7px;
  font-size: .82rem;
  font-weight: 700;
}

.quota-form .dt-primary-button {
  width: 100%;
  margin-top: 18px;
}

.quota-output h3 {
  margin-bottom: 14px;
}

.quota-output-placeholder {
  min-height: 260px;
  display: grid;
  place-items: center;
  border: 1px dashed var(--border-bright);
  border-radius: var(--radius);
  color: var(--text-muted);
  padding: 20px;
  text-align: center;
}

.quota-result-block {
  margin-bottom: 14px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
}

.quota-result-block:last-child { margin-bottom: 0; }

.quota-result-label {
  display: inline-flex;
  margin-bottom: 8px;
  border-radius: 4px;
  padding: 2px 7px;
  font: 700 .68rem/1.5 var(--font-mono);
}

.quota-result-official .quota-result-label { color: var(--accent-cyan); background: rgba(0, 212, 255, .1); }
.quota-result-derived .quota-result-label { color: var(--accent-orange); background: rgba(255, 138, 0, .1); }
.quota-result-observed .quota-result-label { color: var(--accent-green); background: rgba(0, 255, 136, .1); }

.quota-result-block p {
  margin: 0;
  color: var(--text-secondary);
  font-size: .84rem;
}

.quota-result-number {
  display: block;
  margin: 4px 0;
  color: var(--text-primary);
  font: 800 1.35rem/1.3 var(--font-mono);
}

.quota-warning {
  margin-top: 18px;
  border: 1px solid rgba(255, 138, 0, .2);
  border-radius: var(--radius);
  background: rgba(255, 138, 0, .06);
  color: var(--text-secondary);
  padding: 16px;
  font-size: .8rem;
}

.quota-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.quota-table {
  width: 100%;
  min-width: 820px;
  border-collapse: collapse;
  font-size: .82rem;
}

.quota-table th,
.quota-table td {
  border-bottom: 1px solid var(--border);
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
}

.quota-table th {
  background: var(--bg-surface);
  color: var(--text-muted);
  font-size: .72rem;
}

.quota-table td { color: var(--text-secondary); }
.quota-table tr:last-child td { border-bottom: 0; }
.quota-table a { color: var(--accent-cyan); }

.quota-method-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-left: 22px;
  color: var(--text-secondary);
}

.decision-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  color: var(--text-muted);
  font-size: .75rem;
  text-align: center;
}

@media (max-width: 900px) {
  .finder-form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .finder-results,
  .quota-workbench { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .finder-section { padding: 52px 0; }
  .dt-heading { align-items: start; flex-direction: column; gap: 12px; }
  .finder-form { grid-template-columns: 1fr; padding: 14px; }
  .finder-result-columns,
  .evidence-grid { grid-template-columns: 1fr; }
  .finder-result-actions { flex-direction: column; }
  .decision-page .container { width: min(100% - 28px, 1120px); }
  .decision-nav-links { gap: 12px; }
  .decision-nav-links a:first-child { display: none; }
  .quota-hero { padding-top: 58px; }
  .quota-section { padding: 42px 0; }
}

@media (prefers-reduced-motion: reduce) {
  .finder-panel,
  .quota-result,
  .decision-select__menu,
  .decision-select__option {
    animation: none !important;
    transition: none !important;
  }
  html { scroll-behavior: auto; }
}