.journey-page {
  width: min(1280px, calc(100% - 32px));
}
.journey-page .tool-heading { padding: 14px 0 11px; }
.journey-page .tool-heading h1 { font-size: clamp(29px, 3.1vw, 42px); }
.journey-page .lead { max-width: 880px; }

.distance-time-lab .lab-toolbar { min-height: 52px; padding: 10px 18px; }
.distance-time-lab .lab-grid { grid-template-columns: minmax(0, 2.4fr) minmax(360px, 1fr); }
.distance-time-lab .visual-stage { min-width: 0; padding: 12px 14px 13px; }
.distance-time-lab .control-deck { padding: 16px; }

.journey-status {
  min-height: 43px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 12px;
  border: 1px solid #e8dcc9;
  border-radius: 13px;
  color: #6a6258;
  background: rgba(255, 255, 255, .88);
}
.journey-status > span { font-size: 11px; font-weight: 850; }
.journey-targets { display: flex; gap: 15px; }
.journey-targets span { color: #667184; font-size: 9px; font-weight: 800; }
.journey-targets strong { display: block; color: #253149; font-size: 15px; }

.journey-scene {
  min-height: 266px;
  display: grid;
  place-items: center;
  margin-top: 8px;
  overflow: hidden;
  border: 1px solid rgba(71, 139, 165, .24);
  border-radius: 18px;
  background:
    radial-gradient(circle at 18% 18%, rgba(243, 197, 88, .17), transparent 16rem),
    linear-gradient(150deg, rgba(255, 255, 255, .94), rgba(235, 248, 248, .82));
}
.journey-scene svg { width: 100%; height: 266px; display: block; overflow: visible; }
.journey-base-line {
  stroke: #60718a;
  stroke-width: 4;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}
.walked-segment {
  stroke: #e77931;
  stroke-width: 8;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}
.scale-tick line {
  stroke: #60718a;
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
}
.scale-label,
.scale-unit,
.direction-label,
.target-label,
.minute-label,
.minute-distance {
  paint-order: stroke;
  stroke: rgba(255, 255, 255, .96);
  stroke-width: 5px;
  stroke-linejoin: round;
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-weight: 900;
}
.scale-label { fill: #53647c; font-size: 19px; }
.scale-unit { fill: #68778c; font-size: 18px; }
.direction-guide line { stroke: #4c9188; stroke-width: 2.2; stroke-dasharray: 8 6; vector-effect: non-scaling-stroke; }
.direction-guide path { fill: #4c9188; }
.direction-label { fill: #287a70; font-size: 18px; }
.target-marker line { stroke: #b15a26; stroke-width: 1.8; stroke-dasharray: 5 5; vector-effect: non-scaling-stroke; }
.target-marker path { fill: #e9843b; stroke: #ae4d1d; stroke-width: 1.2; }
.target-label { fill: #9b481d; font-size: 18px; }
.minute-node circle { fill: #fff; stroke: #e2752f; stroke-width: 3; vector-effect: non-scaling-stroke; }
.minute-node line { stroke: #d59563; stroke-width: 1.3; stroke-dasharray: 3 3; vector-effect: non-scaling-stroke; }
.minute-label { fill: #9a431c; font-size: 20px; }
.minute-distance { fill: #596a80; font-size: 18px; }
.person-head { fill: #f4c765; stroke: #81552d; stroke-width: 2.2; vector-effect: non-scaling-stroke; }
.person-stroke { stroke: #287b72; stroke-width: 5; stroke-linecap: round; vector-effect: non-scaling-stroke; }

.journey-evidence {
  min-height: 59px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 7px;
  margin-top: 8px;
}
.journey-evidence span {
  min-width: 0;
  display: grid;
  place-items: center;
  padding: 6px 8px;
  border: 1px solid rgba(43, 152, 139, .27);
  border-radius: 12px;
  color: #65736f;
  background: #eaf7f3;
  font-size: 9px;
  font-weight: 850;
  text-align: center;
}
.journey-evidence strong { color: #226d65; font-size: 13px; line-height: 1.2; }

.distance-time-lab .case-button strong { font-size: 12px; }
.distance-time-lab .case-button span { font-size: 8px; }
.distance-time-lab .action-row { grid-template-columns: minmax(0, 1fr) 68px; }
.live-equation {
  min-height: 42px;
  display: grid;
  place-items: center;
  margin: 10px 0 0;
  padding: 7px 9px;
  border-radius: 11px;
  color: #52657b;
  background: #f0f6f7;
  font-size: 10px;
  font-weight: 850;
  text-align: center;
}
.journey-formula-zone {
  min-height: 126px;
  margin-top: 10px;
  padding: 9px 10px;
  border: 1px solid rgba(85, 116, 202, .2);
  border-radius: 14px;
  background: linear-gradient(145deg, #f5f7ff, #fbfcff);
}
.journey-formula-zone .formula-placeholder {
  min-height: 106px;
  display: grid;
  place-items: center;
  margin: 0;
  color: #748095;
  font-size: 11px;
  font-weight: 800;
  text-align: center;
}
.journey-formula-zone .formula-placeholder[hidden],
.journey-formula-zone .formula-proof[hidden] { display: none; }
.journey-formula-zone .formula-proof { display: grid; gap: 4px; }
.journey-formula-zone .proof-step {
  min-height: 23px;
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 0;
  color: #5c687c;
  font-size: 10px;
  font-weight: 850;
}
.journey-formula-zone .proof-step::before {
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: #5574ca;
  content: attr(data-order);
  font-size: 9px;
}
.journey-formula-zone .formula-result { color: #94431c; font-size: 12px; }
.journey-formula-zone .formula-result::before { background: #dc712e; }
.distance-time-lab .truth-note { margin-top: 9px; padding: 8px 9px; font-size: 10px; }

[data-tool-state="settled"] .journey-formula-zone .proof-step { animation: journey-proof-arrive .28s linear both; }
[data-tool-state="settled"] .journey-formula-zone .proof-step:nth-child(2) { animation-delay: .06s; }
[data-tool-state="settled"] .journey-formula-zone .proof-step:nth-child(3) { animation-delay: .12s; }
[data-tool-state="settled"] .journey-formula-zone .proof-step:nth-child(4) { animation-delay: .18s; }

@keyframes journey-proof-arrive {
  from { opacity: 0; transform: translateY(3px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 980px) {
  .journey-page { width: calc(100% - 28px); }
  .distance-time-lab .lab-grid { grid-template-columns: 1fr; }
  .distance-time-lab .visual-stage { border-right: 0; border-bottom: 1px solid #eadfce; }
  .distance-time-lab .control-deck { display: grid; grid-template-columns: 1fr; gap: 9px; }
  .distance-time-lab .control-heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
  }
  .distance-time-lab .control-heading h2 { margin: 0; white-space: nowrap; }
  .distance-time-lab .preset-grid,
  .distance-time-lab .action-row,
  .live-equation,
  .journey-formula-zone,
  .distance-time-lab .truth-note { grid-column: 1 / -1; }
  .distance-time-lab .action-row { margin-top: 0; }
  .live-equation,
  .journey-formula-zone,
  .distance-time-lab .truth-note { margin-top: 0; }
}

@media (max-width: 720px) {
  .journey-page .tool-heading { padding-top: 16px; }
  .distance-time-lab .lab-toolbar { align-items: flex-start; flex-direction: column; gap: 3px; }
  .distance-time-lab .phase-copy { text-align: left; }
  .journey-scene,
  .journey-scene svg { min-height: 244px; height: 244px; }
  .distance-time-lab .control-deck { display: block; }
  .distance-time-lab .action-row,
  .live-equation,
  .journey-formula-zone,
  .distance-time-lab .truth-note { margin-top: 10px; }
}

@media (max-width: 430px) {
  .journey-page { width: calc(100% - 20px); }
  .journey-page .tool-heading { padding: 14px 0 10px; }
  .journey-page .tool-heading h1 { font-size: 25px; }
  .journey-page .lead { font-size: 13px; }
  .distance-time-lab { border-radius: 21px; }
  .distance-time-lab .visual-stage { padding: 9px; }
  .journey-status { align-items: flex-start; flex-direction: column; gap: 2px; }
  .journey-targets { width: 100%; justify-content: space-between; }
  .journey-scene,
  .journey-scene svg { min-height: 220px; height: 220px; }
  .scale-tick.is-minor .scale-label { display: none; }
  .journey-evidence { grid-template-columns: 1fr; }
  .journey-evidence span { min-height: 42px; grid-template-columns: 1fr 1.4fr; }
  .distance-time-lab .case-button strong { font-size: 10px; }
  .distance-time-lab .case-button span { font-size: 7px; }
  .distance-time-lab .control-deck { padding: 13px; }
  .journey-formula-zone { min-height: 132px; }
}

@media (prefers-reduced-motion: reduce) {
  [data-tool-state="settled"] .journey-formula-zone .proof-step { animation: none !important; }
}