*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root,
:root[data-theme="light"] {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-2: #eef2f7;
  --surface-3: #e6ebf2;
  --border: #d9e0ea;
  --border-strong: #b8c3d0;
  --text: #17202e;
  --text-soft: #526071;
  --text-muted: #7a8698;
  --accent: #1f6feb;
  --accent-ink: #ffffff;
  --accent-soft: #e8f1ff;
  --good: #087f5b;
  --good-soft: #e4f7ef;
  --warn: #9a6700;
  --warn-soft: #fff7db;
  --danger: #c92a2a;
  --danger-soft: #fff0f0;
  --night: #364fc7;
  --morning: #b35c00;
  --shadow: 0 18px 45px rgba(25, 37, 55, 0.08);
  --radius: 8px;
}

:root[data-theme="dark"] {
  --bg: #10141b;
  --surface: #171d26;
  --surface-2: #202835;
  --surface-3: #283242;
  --border: #313b4a;
  --border-strong: #465366;
  --text: #e8edf5;
  --text-soft: #aab4c2;
  --text-muted: #7f8a9b;
  --accent: #6ea8fe;
  --accent-ink: #07111f;
  --accent-soft: #142945;
  --good: #63e6be;
  --good-soft: #14342d;
  --warn: #ffd43b;
  --warn-soft: #342d12;
  --danger: #ff8787;
  --danger-soft: #351d22;
  --night: #91a7ff;
  --morning: #ffc078;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
}

body {
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(31, 111, 235, 0.04), transparent 240px),
    var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.5;
  letter-spacing: 0;
}

button,
input {
  font: inherit;
}

button {
  border: 0;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 72px;
  padding: 14px clamp(16px, 3vw, 36px);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px);
}

.brand,
.topbar-actions,
.section-head,
.panel-head,
.workspace-head,
.results-header,
.dest-header,
.md-card-head,
.md-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  justify-content: flex-start;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: var(--text);
  color: var(--surface);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.brand h1 {
  font-size: 1rem;
  line-height: 1.2;
}

.brand p,
.data-source,
.workspace-copy,
.results-hint,
.md-hint,
.fav-empty,
.decision-note p,
.footer {
  color: var(--text-muted);
  font-size: 0.86rem;
}

.topbar-actions {
  flex-shrink: 0;
}

.icon-btn {
  min-width: 42px;
  height: 36px;
  padding: 0 12px;
  border-radius: 8px;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  cursor: pointer;
}

.icon-btn:hover,
.secondary-btn:hover,
.swap-btn:hover {
  border-color: var(--border-strong);
  background: var(--surface-3);
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(320px, 410px) minmax(0, 1fr);
  gap: 20px;
  width: min(1480px, 100%);
  margin: 0 auto;
  padding: 20px clamp(14px, 2.4vw, 32px) 34px;
}

.control-panel {
  position: sticky;
  top: 92px;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.search-form,
.fav-section,
.decision-note,
.workspace,
.plan-card,
.multi-day-card,
.dest-card,
.empty-state {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.search-form,
.fav-section,
.decision-note,
.workspace {
  padding: 18px;
}

.panel-head,
.section-head {
  margin-bottom: 16px;
}

.panel-head h2,
.section-head h2,
.decision-note h2,
.workspace-head h2,
.results-header h2,
.dest-card h3,
.md-card-head h3 {
  color: var(--text);
  font-size: 1rem;
  font-weight: 700;
}

.panel-head span,
.section-head span {
  color: var(--text-muted);
  font-size: 0.78rem;
}

.route-grid {
  display: grid;
  grid-template-columns: 1fr 42px 1fr;
  align-items: end;
  gap: 10px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-bottom: 14px;
}

.field label {
  color: var(--text-soft);
  font-size: 0.78rem;
  font-weight: 650;
}

.input-wrap {
  position: relative;
}

.input-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background: var(--surface-2);
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 700;
  pointer-events: none;
}

.input-wrap input {
  width: 100%;
  height: 44px;
  padding: 0 12px 0 42px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.95rem;
}

.input-wrap input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

.swap-btn {
  width: 42px;
  height: 44px;
  margin-bottom: 14px;
  border-radius: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-soft);
  cursor: pointer;
}

.autocomplete-list {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  z-index: 100;
  max-height: 220px;
  overflow: auto;
  list-style: none;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.autocomplete-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  color: var(--text);
  cursor: pointer;
  font-size: 0.9rem;
}

.autocomplete-list li:hover,
.autocomplete-list li.active {
  background: var(--accent-soft);
}

.autocomplete-list .ac-code {
  color: var(--text-muted);
  font-size: 0.76rem;
}

.filter-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: 4px 0 14px;
}

.toggle-label {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-soft);
  background: var(--surface-2);
  cursor: pointer;
  font-size: 0.84rem;
}

.toggle-label input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.toggle-box {
  width: 15px;
  height: 15px;
  border-radius: 4px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
}

.toggle-label input:checked + .toggle-box {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: inset 0 0 0 3px var(--surface);
}

.toggle-label:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--text);
}

.action-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 8px;
}

.search-btn,
.secondary-btn,
.md-detail {
  height: 42px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
}

.search-btn {
  background: var(--accent);
  color: var(--accent-ink);
  padding: 0 18px;
}

.search-btn:disabled {
  cursor: progress;
  opacity: 0.65;
}

.secondary-btn {
  padding: 0 13px;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.fav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.fav-item {
  display: inline-flex;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-2);
}

.fav-apply,
.fav-remove {
  min-height: 34px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.fav-apply {
  padding: 0 12px;
  font-size: 0.84rem;
}

.fav-remove {
  width: 34px;
  border-left: 1px solid var(--border);
  color: var(--text-muted);
}

.fav-remove:hover {
  color: var(--danger);
  background: var(--danger-soft);
}

.decision-note {
  display: grid;
  gap: 8px;
}

.workspace {
  min-height: calc(100vh - 126px);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.workspace-head {
  align-items: flex-start;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.kicker {
  margin-bottom: 3px;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.workspace-copy {
  max-width: 520px;
  text-align: right;
}

.warnings,
.error-box,
.dest-error {
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 0.88rem;
}

.warnings {
  color: var(--warn);
  background: var(--warn-soft);
  border: 1px solid color-mix(in srgb, var(--warn) 28%, transparent);
}

.error-box,
.dest-error {
  color: var(--danger);
  background: var(--danger-soft);
  border: 1px solid color-mix(in srgb, var(--danger) 24%, transparent);
}

.results,
.multi-day-card,
.dest-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.results-header {
  align-items: flex-end;
}

.count-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 24px;
  margin-left: 6px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-soft);
  font-size: 0.78rem;
}

.plan-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 12px;
}

.plan-card {
  position: relative;
  padding: 16px;
  box-shadow: none;
}

.plan-card:hover {
  border-color: var(--border-strong);
}

.plan-card.top-pick::before {
  content: "推荐";
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--good-soft);
  color: var(--good);
  font-size: 0.72rem;
  font-weight: 800;
}

.plan-route {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-right: 54px;
  margin-bottom: 12px;
}

.plan-time-block,
.plan-station-block {
  min-width: 70px;
  text-align: left;
}

.plan-time {
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1;
  color: var(--text);
}

.plan-date,
.plan-station,
.plan-duration,
.plan-wait {
  color: var(--text-muted);
  font-size: 0.76rem;
}

.plan-station {
  margin-top: 2px;
  color: var(--text-soft);
}

.plan-middle,
.plan-leg {
  min-width: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 5px;
}

.plan-line {
  display: flex;
  align-items: center;
  gap: 4px;
  width: 100%;
}

.line-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.line-bar {
  flex: 1;
  height: 2px;
  background: var(--border-strong);
}

.line-arrow {
  color: var(--text-muted);
  font-size: 0.72rem;
}

.plan-train-no {
  color: var(--text);
  font-size: 0.86rem;
  font-weight: 750;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.plan-route-transfer {
  display: grid;
  grid-template-columns: minmax(70px, auto) 1fr minmax(104px, auto) 1fr minmax(70px, auto);
  align-items: center;
  gap: 10px;
  padding-right: 54px;
}

.plan-route-transfer .plan-station-block {
  min-width: 0;
}

.plan-station-transfer {
  padding: 8px;
  border-radius: 8px;
  background: var(--surface-2);
  border: 1px dashed var(--border-strong);
}

.plan-transfer-badge {
  display: inline-flex;
  margin-bottom: 4px;
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--surface);
  color: var(--text-soft);
  font-size: 0.7rem;
  font-weight: 800;
}

.plan-time-pair {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--text);
  font-weight: 750;
}

.plan-time-small {
  font-size: 0.9rem;
}

.plan-time-sep {
  color: var(--text-muted);
}

.plan-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 12px 0;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-soft);
  font-size: 0.75rem;
  font-weight: 700;
}

.tag-night {
  color: var(--night);
  background: color-mix(in srgb, var(--night) 12%, var(--surface));
}

.tag-morning {
  color: var(--morning);
  background: color-mix(in srgb, var(--morning) 12%, var(--surface));
}

.tag-sleeper,
.tag-direct {
  color: var(--good);
  background: var(--good-soft);
}

.tag-score {
  margin-left: auto;
  color: var(--text);
}

.plan-reasons {
  display: grid;
  gap: 5px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

.reason-item {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  color: var(--text-soft);
  font-size: 0.82rem;
}

.reason-icon {
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--border-strong);
  color: transparent;
  overflow: hidden;
}

.md-list,
.dest-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}

.md-item,
.dest-item {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-2);
}

.md-item.md-best {
  border-color: var(--good);
  background: var(--good-soft);
}

.md-date {
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 800;
}

.md-best-tag {
  margin-left: 6px;
  color: var(--good);
  font-size: 0.72rem;
}

.md-score,
.md-route,
.md-empty .md-msg {
  color: var(--text-muted);
  font-size: 0.82rem;
}

.md-route {
  margin: 6px 0 8px;
}

.md-detail {
  height: auto;
  padding: 0;
  background: transparent;
  color: var(--accent);
}

.dest-card {
  padding: 16px;
  box-shadow: none;
}

.dest-tabs {
  display: flex;
  gap: 6px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.dest-tab {
  height: 34px;
  padding: 0 12px;
  border-radius: 8px;
  background: transparent;
  color: var(--text-soft);
  cursor: pointer;
}

.dest-tab.active {
  background: var(--surface-2);
  color: var(--text);
  font-weight: 800;
}

.dest-summary {
  color: var(--text-soft);
  font-size: 0.9rem;
  line-height: 1.75;
}

.dest-item {
  display: flex;
  gap: 10px;
}

.dest-item-icon {
  display: none;
}

.dest-item-name {
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 800;
}

.dest-item-desc,
.dest-empty {
  color: var(--text-muted);
  font-size: 0.82rem;
}

.empty-state {
  display: grid;
  min-height: 220px;
  place-items: center;
  color: var(--text-muted);
  box-shadow: none;
}

.footer {
  width: min(1480px, 100%);
  margin: 0 auto;
  padding: 0 clamp(14px, 2.4vw, 32px) 30px;
}

.hidden {
  display: none !important;
}

@media (max-width: 1080px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .control-panel {
    position: static;
  }

  .workspace-copy {
    text-align: left;
  }
}

@media (max-width: 720px) {
  .topbar,
  .brand,
  .workspace-head,
  .results-header {
    align-items: flex-start;
  }

  .topbar,
  .workspace-head,
  .results-header {
    flex-direction: column;
  }

  .topbar-actions {
    width: 100%;
  }

  .data-source {
    flex: 1;
  }

  .route-grid,
  .filter-row,
  .action-row {
    grid-template-columns: 1fr;
  }

  .swap-btn {
    width: 100%;
    margin-bottom: 0;
  }

  .plan-list {
    grid-template-columns: 1fr;
  }

  .plan-route,
  .plan-route-transfer {
    padding-right: 0;
  }

  .plan-route-transfer {
    grid-template-columns: 1fr;
  }

  .plan-leg {
    min-height: 34px;
  }

  .tag-score {
    margin-left: 0;
  }
}

@media (max-width: 460px) {
  .app-shell {
    padding-left: 10px;
    padding-right: 10px;
  }

  .search-form,
  .fav-section,
  .decision-note,
  .workspace {
    padding: 14px;
  }

  .plan-card {
    padding: 13px;
  }

  .plan-time {
    font-size: 1.28rem;
  }
}