diff --git a/src/components/work/rtkCanvas.vue b/src/components/work/rtkCanvas.vue
index cd3010a..fc3d082 100644
--- a/src/components/work/rtkCanvas.vue
+++ b/src/components/work/rtkCanvas.vue
@@ -1,23 +1,271 @@
 <script setup lang="ts">
+/**
+ * 固定比例尺绘制：轨迹变长只加高画布/白卡，图案不缩小
+ */
+import type { MockRtkPoint } from '@/mock/rtkTrack'
+import { getCurrentInstance, nextTick, onMounted, onUnmounted, ref, watch } from 'vue'
 import { useCurrentProject } from '@/composables/useCurrentProject'
+import { createMockRtkStream } from '@/mock/rtkTrack'
 
 const { hasCurrentProject } = useCurrentProject()
+const instance = getCurrentInstance()?.proxy
+
+const CANVAS_ID = 'rtkTrackCanvas'
+const PADDING = 28
+const ROLLER_WIDTH = 14
+const MIN_H = 160
+
+const canvasHeight = ref(MIN_H)
+const trail: MockRtkPoint[] = []
+let finished = false
+let cssWidth = 0
+let cssHeight = MIN_H
+let ready = false
+let initTries = 0
+let stream = createMockRtkStream({ intervalMs: 80, loop: true, rows: 80, pointsPerRow: 40 })
+
+/** 固定东西向范围与比例尺（米/像素），避免越画越小 */
+let fixedMinLon = 0
+let fixedMaxLon = 0
+let fixedMaxLat = 0 // 北端固定（起点一侧）
+let pxPerMeter = 1
 
 function goToRtk() {
-  uni.navigateTo({
-    url: '/pages/rtk/index',
+  uni.navigateTo({ url: '/pages/rtk/index' })
+}
+
+function compactionColor(value: number) {
+  const t = Math.min(1, Math.max(0, (value - 75) / 25))
+  const r = Math.round(200 - t * 90)
+  const g = Math.round(230 - t * 40)
+  const b = Math.round(170 - t * 70)
+  return `rgba(${r}, ${g}, ${b}, 0.75)`
+}
+
+function metersPerDeg(lat: number) {
+  return {
+    lat: 111320,
+    lon: 111320 * Math.cos((lat * Math.PI) / 180),
+  }
+}
+
+/** 用完整假路径定死东西跨度与比例尺；高度只随已画南北跨度增加 */
+function initFixedScale(allPoints: MockRtkPoint[]) {
+  if (!allPoints.length || cssWidth <= 0)
+    return
+
+  let minLat = Infinity
+  let maxLat = -Infinity
+  let minLon = Infinity
+  let maxLon = -Infinity
+  for (const p of allPoints) {
+    minLat = Math.min(minLat, p.latitude)
+    maxLat = Math.max(maxLat, p.latitude)
+    minLon = Math.min(minLon, p.longitude)
+    maxLon = Math.max(maxLon, p.longitude)
+  }
+  const padLon = (maxLon - minLon) * 0.08 || 0.00001
+  fixedMinLon = minLon - padLon
+  fixedMaxLon = maxLon + padLon
+  fixedMaxLat = maxLat + ((maxLat - minLat) * 0.08 || 0.00001)
+
+  const midLat = (minLat + maxLat) / 2
+  const { lon: mLon } = metersPerDeg(midLat)
+  const lonSpanM = Math.max((fixedMaxLon - fixedMinLon) * mLon, 1e-3)
+  pxPerMeter = (cssWidth - PADDING * 2) / lonSpanM
+}
+
+function trailMinLat() {
+  let minLat = fixedMaxLat
+  for (const p of trail)
+    minLat = Math.min(minLat, p.latitude)
+  const pad = 0.00001
+  return minLat - pad
+}
+
+/** 按已绘制南北跨度撑高（比例尺不变） */
+function updateHeightFromTrail() {
+  if (cssWidth <= 0 || !trail.length || pxPerMeter <= 0)
+    return
+
+  const minLat = trailMinLat()
+  const { lat: mLat } = metersPerDeg((fixedMaxLat + minLat) / 2)
+  const latSpanM = Math.max((fixedMaxLat - minLat) * mLat, 0)
+  const next = Math.max(MIN_H, Math.round(PADDING * 2 + latSpanM * pxPerMeter))
+
+  if (next !== cssHeight) {
+    cssHeight = next
+    canvasHeight.value = next
+  }
+}
+
+function toXY(point: MockRtkPoint) {
+  const midLat = (fixedMaxLat + point.latitude) / 2
+  const { lat: mLat, lon: mLon } = metersPerDeg(midLat)
+  return {
+    x: PADDING + (point.longitude - fixedMinLon) * mLon * pxPerMeter,
+    y: PADDING + (fixedMaxLat - point.latitude) * mLat * pxPerMeter,
+  }
+}
+
+function draw() {
+  if (!ready || cssWidth <= 0)
+    return
+
+  const ctx = uni.createCanvasContext(CANVAS_ID, instance as any)
+  const path = trail
+
+  ctx.setFillStyle('#ffffff')
+  ctx.fillRect(0, 0, cssWidth, cssHeight)
+
+  if (!path.length) {
+    ctx.draw()
+    return
+  }
+
+  const coords = path.map(p => toXY(p))
+
+  ctx.setLineCap('round')
+  ctx.setLineJoin('round')
+  ctx.setLineWidth(ROLLER_WIDTH)
+  for (let i = 1; i < coords.length; i++) {
+    ctx.beginPath()
+    ctx.setStrokeStyle(compactionColor(path[i].compaction))
+    ctx.moveTo(coords[i - 1].x, coords[i - 1].y)
+    ctx.lineTo(coords[i].x, coords[i].y)
+    ctx.stroke()
+  }
+
+  ctx.beginPath()
+  ctx.setLineWidth(2.5)
+  ctx.setStrokeStyle('#2563eb')
+  coords.forEach((c, i) => {
+    if (i === 0)
+      ctx.moveTo(c.x, c.y)
+    else
+      ctx.lineTo(c.x, c.y)
+  })
+  ctx.stroke()
+
+  const start = coords[0]
+  ctx.beginPath()
+  ctx.setFillStyle('#22c55e')
+  ctx.arc(start.x, start.y, 10, 0, Math.PI * 2)
+  ctx.fill()
+  ctx.setFillStyle('#166534')
+  ctx.setFontSize(10)
+  ctx.setTextAlign('center')
+  ctx.fillText('起点', start.x, start.y - 14)
+
+  const last = coords[coords.length - 1]
+  const cur = path[path.length - 1]
+  if (finished) {
+    ctx.beginPath()
+    ctx.setFillStyle('#ef4444')
+    ctx.moveTo(last.x, last.y - 14)
+    ctx.lineTo(last.x + 10, last.y)
+    ctx.lineTo(last.x, last.y + 4)
+    ctx.lineTo(last.x - 10, last.y)
+    ctx.closePath()
+    ctx.fill()
+    ctx.setFillStyle('#991b1b')
+    ctx.fillText('结束', last.x, last.y + 18)
+  }
+  else {
+    ctx.beginPath()
+    ctx.setFillStyle('#f97316')
+    ctx.arc(last.x, last.y, 7, 0, Math.PI * 2)
+    ctx.fill()
+
+    const heading = (cur.heading * Math.PI) / 180
+    ctx.beginPath()
+    ctx.setStrokeStyle('#ea580c')
+    ctx.setLineWidth(2)
+    ctx.moveTo(last.x, last.y)
+    ctx.lineTo(last.x + Math.sin(heading) * 12, last.y - Math.cos(heading) * 12)
+    ctx.stroke()
+  }
+
+  ctx.draw()
+}
+
+function measureAndReady(onReady?: () => void) {
+  uni.createSelectorQuery()
+    .in(instance as any)
+    .select('.rtk-canvas')
+    .boundingClientRect((rect) => {
+      const box = Array.isArray(rect) ? rect[0] : rect
+      const w = Number(box?.width) || 0
+      if (w <= 0) {
+        initTries += 1
+        if (initTries < 20)
+          setTimeout(() => measureAndReady(onReady), 50)
+        return
+      }
+
+      cssWidth = w
+      cssHeight = MIN_H
+      canvasHeight.value = MIN_H
+      ready = true
+      onReady?.()
+    })
+    .exec()
+}
+
+function startStream() {
+  stream.stop()
+  stream = createMockRtkStream({ intervalMs: 80, loop: true, rows: 80, pointsPerRow: 40 })
+  trail.length = 0
+  finished = false
+  initFixedScale(stream.points)
+  cssHeight = MIN_H
+  canvasHeight.value = MIN_H
+  draw()
+
+  stream.start((point, index) => {
+    trail.push(point)
+    finished = index >= stream.points.length - 1
+    updateHeightFromTrail()
+    nextTick(() => draw())
   })
 }
+
+function stopStream() {
+  stream.stop()
+  trail.length = 0
+  finished = false
+  cssHeight = MIN_H
+  canvasHeight.value = MIN_H
+  if (ready)
+    draw()
+}
+
+function boot() {
+  if (!hasCurrentProject.value) {
+    stopStream()
+    return
+  }
+  initTries = 0
+  measureAndReady(() => startStream())
+}
+
+watch(hasCurrentProject, () => nextTick(() => boot()))
+onMounted(() => nextTick(() => boot()))
+onUnmounted(() => stream.stop())
 </script>
 
 <template>
-  <view class="rtk-canvas" @click="goToRtk">
-    <view class="canvas-placeholder">
+  <view class="rtk-canvas" :style="{ height: `${canvasHeight}px` }" @click="goToRtk">
+    <canvas
+      v-if="hasCurrentProject"
+      :id="CANVAS_ID"
+      :canvas-id="CANVAS_ID"
+      class="track-canvas"
+      :style="{ width: '100%', height: `${canvasHeight}px` }"
+    />
+    <view v-else class="canvas-placeholder">
       <text class="placeholder-text">
-        {{ hasCurrentProject ? '轨迹动画区域' : '--' }}
-      </text>
-      <text v-if="hasCurrentProject" class="placeholder-hint">
-        （Canvas 绘制行驶轨迹 + 压实热力图）
+        --
       </text>
     </view>
   </view>
@@ -25,30 +273,30 @@ function goToRtk() {
 
 <style scoped>
 .rtk-canvas {
+  position: relative;
   width: 100%;
-  height: 300px;
-  background: #f0fdf4;
+  background: #ffffff;
   border-radius: 8px;
   overflow: hidden;
+  flex-shrink: 0;
+}
+
+.track-canvas {
+  width: 100%;
+  display: block;
 }
 
 .canvas-placeholder {
   width: 100%;
-  height: 100%;
+  min-height: 160px;
   display: flex;
-  flex-direction: column;
   align-items: center;
   justify-content: center;
-  gap: 8px;
+  background: #f0fdf4;
 }
 
 .placeholder-text {
   font-size: 14px;
   color: #666;
 }
-
-.placeholder-hint {
-  font-size: 12px;
-  color: #999;
-}
 </style>
diff --git a/src/components/work/rtkMonitor.vue b/src/components/work/rtkMonitor.vue
index 308f8b6..d8e7cc4 100644
--- a/src/components/work/rtkMonitor.vue
+++ b/src/components/work/rtkMonitor.vue
@@ -1,24 +1,34 @@
 <script setup lang="ts">
-// RTK轨迹实时监测 + 压实热力图 - 父组件（组合头部 + 画布 + 底部）
+// RTK轨迹实时监测：整卡高度随画布内容撑开（不要 min-height:100% 锁死视口）
 </script>
 
 <template>
   <view class="card">
-    <!-- 状态头部 -->
-    <work-rtkHeader />
-
-    <!-- 轨迹画布 -->
-    <work-rtkCanvas />
-
-    <!-- 底部信息 -->
-    <work-rtkFooter />
+    <work-rtkHeader class="card-header" />
+    <work-rtkCanvas class="card-canvas" />
+    <work-rtkFooter class="card-footer" />
   </view>
 </template>
 
 <style scoped>
 .card {
+  display: flex;
+  flex-direction: column;
   background: #fff;
   border-radius: 12px;
   padding: 16px;
+  /* 高度完全跟内容走，轨迹变长整卡变高 */
+  height: auto;
+  box-sizing: border-box;
+}
+
+.card-header,
+.card-footer {
+  flex-shrink: 0;
+}
+
+.card-canvas {
+  flex: 0 0 auto;
+  width: 100%;
 }
 </style>
diff --git a/src/mock/index.ts b/src/mock/index.ts
index 0c3342d..052eba6 100644
--- a/src/mock/index.ts
+++ b/src/mock/index.ts
@@ -1,5 +1,8 @@
 import formattedDate from './time'
 
+export { createMockRtkStream, generateSerpentineTrack } from './rtkTrack'
+export type { MockRtkPoint, MockRtkStream, MockRtkStreamOptions } from './rtkTrack'
+
 export const mockData = {
   time: formattedDate,
   message: 'Hello, this is mock data!',
diff --git a/src/mock/rtkTrack.ts b/src/mock/rtkTrack.ts
new file mode 100644
index 0000000..50a04be
--- /dev/null
+++ b/src/mock/rtkTrack.ts
@@ -0,0 +1,171 @@
+/**
+ * RTK 轨迹假数据：蛇形碾压路径 + 持续推送
+ * 字段：经纬度、航向角（度，0=北）、压实度
+ */
+
+export interface MockRtkPoint {
+  latitude: number
+  longitude: number
+  heading: number
+  compaction: number
+}
+
+export interface MockRtkStreamOptions {
+  /** 推送间隔 ms，默认 120 */
+  intervalMs?: number
+  /** 结束后是否循环，默认 true */
+  loop?: boolean
+  /** 横向行数，默认 80（约 10 倍于早期 8 行） */
+  rows?: number
+  /** 每行采样点数，默认 40 */
+  pointsPerRow?: number
+}
+
+export interface MockRtkStream {
+  /** 完整路径（用于画布定界） */
+  readonly points: MockRtkPoint[]
+  start: (onPoint: (point: MockRtkPoint, index: number) => void) => void
+  stop: () => void
+  reset: () => void
+  getIndex: () => number
+}
+
+/** 航向归一化到 [0, 360) */
+function normalizeHeading(deg: number) {
+  return ((deg % 360) + 360) % 360
+}
+
+function makeCompaction(seed: number) {
+  const wave = Math.sin(seed / 4) * 4
+  return Number(Math.min(98, Math.max(78, 88 + wave + (Math.random() - 0.5) * 3)).toFixed(1))
+}
+
+/**
+ * 行末三角掉头：行末 → 外侧顶点 → 下行起点
+ * 航向先转 60°（到顶点），再转 120°（合计 180° 衔接下行）
+ */
+function pushUTurnTriangle(
+  points: MockRtkPoint[],
+  startLat: number,
+  startLon: number,
+  fromHeading: number,
+  latStep: number,
+  eastward: boolean,
+  seedRef: { value: number },
+) {
+  const nextLat = startLat + latStep
+  const midLat = startLat + latStep / 2
+  // 外侧突出量 ≈ 半个行距（换算到经度），形成尖角
+  const tipLatOffset = Math.abs(latStep) / 2
+  const metersPerDegLat = 111320
+  const metersPerDegLon = 111320 * Math.cos((startLat * Math.PI) / 180)
+  const tipLonOffset = (tipLatOffset * metersPerDegLat) / metersPerDegLon
+  const tipLon = startLon + (eastward ? tipLonOffset : -tipLonOffset)
+
+  const turnSign = eastward ? 1 : -1
+
+  // 1) 外侧顶点：航向 +60° / -60°
+  points.push({
+    latitude: Number(midLat.toFixed(7)),
+    longitude: Number(tipLon.toFixed(7)),
+    heading: normalizeHeading(fromHeading + 60 * turnSign),
+    compaction: makeCompaction(seedRef.value++),
+  })
+
+  // 2) 下行起点：航向转满 180°
+  points.push({
+    latitude: Number(nextLat.toFixed(7)),
+    longitude: Number(startLon.toFixed(7)),
+    heading: normalizeHeading(fromHeading + 180 * turnSign),
+    compaction: makeCompaction(seedRef.value++),
+  })
+}
+
+/** 生成类似示意图的左右蛇形碾压路径 */
+export function generateSerpentineTrack(options: MockRtkStreamOptions = {}): MockRtkPoint[] {
+  const rows = options.rows ?? 80
+  const pointsPerRow = options.pointsPerRow ?? 40
+
+  // 以雄安附近坐标为基准，量级约几十米行程
+  const originLat = 39.0425
+  const originLon = 115.8620
+  const lonStep = 0.00012 // ~10m 东向
+  const latStep = -0.000045 // ~5m 南向（行间距）
+
+  const points: MockRtkPoint[] = []
+  const seedRef = { value: 0 }
+
+  for (let row = 0; row < rows; row++) {
+    const eastward = row % 2 === 0
+    const heading = eastward ? 90 : 270
+    const lat = originLat + row * latStep
+
+    for (let col = 0; col < pointsPerRow; col++) {
+      const t = eastward ? col : (pointsPerRow - 1 - col)
+      const lon = originLon + t * lonStep
+      points.push({
+        latitude: Number(lat.toFixed(7)),
+        longitude: Number(lon.toFixed(7)),
+        heading,
+        compaction: makeCompaction(seedRef.value++),
+      })
+    }
+
+    // 行末三角掉头（外凸尖角）
+    if (row < rows - 1) {
+      const endT = eastward ? (pointsPerRow - 1) : 0
+      const endLon = originLon + endT * lonStep
+      pushUTurnTriangle(points, lat, endLon, heading, latStep, eastward, seedRef)
+    }
+  }
+
+  return points
+}
+
+/** 持续推送假轨迹点 */
+export function createMockRtkStream(options: MockRtkStreamOptions = {}): MockRtkStream {
+  const points = generateSerpentineTrack(options)
+  const intervalMs = options.intervalMs ?? 120
+  const loop = options.loop ?? true
+
+  let index = 0
+  let timer: ReturnType<typeof setInterval> | null = null
+
+  function stop() {
+    if (timer != null) {
+      clearInterval(timer)
+      timer = null
+    }
+  }
+
+  function reset() {
+    stop()
+    index = 0
+  }
+
+  function start(onPoint: (point: MockRtkPoint, index: number) => void) {
+    stop()
+    timer = setInterval(() => {
+      if (index >= points.length) {
+        if (loop) {
+          index = 0
+        }
+        else {
+          stop()
+          return
+        }
+      }
+      const point = points[index]
+      onPoint(point, index)
+      index += 1
+    }, intervalMs)
+  }
+
+  return {
+    points,
+    start,
+    stop,
+    reset,
+    getIndex: () => index,
+  }
+}
diff --git a/src/pages/work/index.vue b/src/pages/work/index.vue
index 5e9f9eb..71a530b 100644
--- a/src/pages/work/index.vue
+++ b/src/pages/work/index.vue
@@ -40,11 +40,12 @@ definePage({
   padding-top: 72px;
 }
 
-/* 双列布局 */
+/* 双列：最小一屏，内容变高时整页跟着撑开可滚动 */
 .two-column {
   display: flex;
+  align-items: flex-start;
   gap: 12px;
-  height: calc(100vh - 84px);
+  min-height: calc(100vh - 84px);
 }
 
 .column-left {
@@ -52,11 +53,16 @@ definePage({
   display: flex;
   flex-direction: column;
   gap: 12px;
+  position: sticky;
+  top: 72px;
 }
 
 .column-right {
   flex: 1;
   display: flex;
   flex-direction: column;
+  /* 右侧白卡随轨迹变高，不锁成一屏高 */
+  height: auto;
+  align-self: stretch;
 }
 </style>