diff --git a/frontend/public/earth/_backup/dock-centered-20260326/base.css b/frontend/public/earth/_backup/dock-centered-20260326/base.css
new file mode 100644
index 00000000..5337baa4
--- /dev/null
+++ b/frontend/public/earth/_backup/dock-centered-20260326/base.css
@@ -0,0 +1,435 @@
+/* base.css - 公共基础样式 */
+
+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+body {
+  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+  background-color: #0a0a1a;
+  color: #fff;
+  overflow: hidden;
+}
+
+#container {
+  position: relative;
+  width: 100vw;
+  height: 100vh;
+}
+
+#container.dragging {
+  cursor: grabbing;
+}
+
+/* Bottom Dock */
+#right-toolbar-group {
+  position: absolute;
+  bottom: 20px;
+  left: 50%;
+  transform: translateX(-50%);
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  justify-content: center;
+  z-index: 200;
+}
+
+#right-toolbar-group,
+#info-panel,
+#coordinates-display,
+#legend,
+#earth-stats {
+  transition:
+    top 0.45s ease,
+    right 0.45s ease,
+    bottom 0.45s ease,
+    left 0.45s ease,
+    transform 0.45s ease,
+    box-shadow 0.45s ease;
+}
+
+/* Zoom Toolbar - Right side, vertical */
+#zoom-toolbar {
+  position: relative;
+  bottom: auto;
+  right: auto;
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  gap: 6px;
+  flex-shrink: 0;
+}
+
+#zoom-toolbar .zoom-percent {
+  font-size: 0.75rem;
+  font-weight: 600;
+  color: #4db8ff;
+  min-width: 30px;
+  display: inline-block;
+  text-align: center;
+  cursor: pointer;
+  padding: 2px 4px;
+  border-radius: 3px;
+  transition: all 0.2s ease;
+}
+
+#zoom-toolbar .zoom-percent:hover {
+  background: rgba(77, 184, 255, 0.2);
+  box-shadow: 0 0 10px rgba(77, 184, 255, 0.3);
+}
+
+#zoom-toolbar .zoom-btn {
+  width: 28px;
+  height: 28px;
+  min-width: 28px;
+  border: none;
+  border-radius: 50%;
+  background: rgba(77, 184, 255, 0.2);
+  color: #4db8ff;
+  font-size: 14px;
+  font-weight: bold;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  transition: all 0.2s ease;
+  padding: 0;
+  margin: 0;
+  flex: 0 0 auto;
+  box-sizing: border-box;
+  position: relative;
+}
+
+#zoom-toolbar .zoom-btn:hover {
+  background: rgba(77, 184, 255, 0.4);
+  transform: scale(1.1);
+  box-shadow: 0 0 10px rgba(77, 184, 255, 0.5);
+}
+
+#zoom-toolbar #reset-view svg {
+  width: 18px;
+  height: 18px;
+  stroke: currentColor;
+  stroke-width: 1.8;
+  fill: none;
+  stroke-linecap: round;
+  stroke-linejoin: round;
+}
+
+#zoom-toolbar .zoom-percent {
+  position: relative;
+}
+
+#zoom-toolbar .tooltip {
+  position: absolute;
+  bottom: calc(100% + 12px);
+  left: 50%;
+  transform: translateX(-50%);
+  background: rgba(10, 10, 30, 0.95);
+  color: #fff;
+  padding: 6px 12px;
+  border-radius: 6px;
+  font-size: 12px;
+  white-space: nowrap;
+  opacity: 0;
+  visibility: hidden;
+  transition: all 0.2s ease;
+  border: 1px solid rgba(77, 184, 255, 0.4);
+  pointer-events: none;
+  z-index: 100;
+}
+
+#zoom-toolbar .zoom-btn:hover .tooltip,
+#zoom-toolbar .zoom-percent:hover .tooltip {
+  opacity: 1;
+  visibility: visible;
+}
+
+#zoom-toolbar .tooltip::after {
+  content: '';
+  position: absolute;
+  top: 100%;
+  left: 50%;
+  transform: translateX(-50%);
+  border: 6px solid transparent;
+  border-top-color: rgba(77, 184, 255, 0.4);
+}
+
+#loading {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  font-size: 1.2rem;
+  color: #4db8ff;
+  z-index: 100;
+  text-align: center;
+  background-color: rgba(10, 10, 30, 0.95);
+  padding: 30px;
+  border-radius: 10px;
+  border: 1px solid #4db8ff;
+  box-shadow: 0 0 30px rgba(77,184,255,0.3);
+}
+
+#loading-spinner {
+  border: 4px solid rgba(77, 184, 255, 0.3);
+  border-top: 4px solid #4db8ff;
+  border-radius: 50%;
+  width: 40px;
+  height: 40px;
+  animation: spin 1s linear infinite;
+  margin: 0 auto 15px;
+}
+
+@keyframes spin {
+  0% { transform: rotate(0deg); }
+  100% { transform: rotate(360deg); }
+}
+
+.error-message {
+  color: #ff4444;
+  margin-top: 10px;
+  font-size: 0.9rem;
+  display: none;
+  padding: 10px;
+  background-color: rgba(255, 68, 68, 0.1);
+  border-radius: 5px;
+  border-left: 3px solid #ff4444;
+}
+
+.terrain-controls {
+  margin-top: 15px;
+  padding-top: 15px;
+  border-top: 1px solid rgba(255, 255, 255, 0.1);
+}
+
+.slider-container {
+  margin-bottom: 10px;
+}
+
+.slider-label {
+  display: flex;
+  justify-content: space-between;
+  margin-bottom: 5px;
+  font-size: 0.9rem;
+}
+
+input[type="range"] {
+  width: 100%;
+  height: 8px;
+  -webkit-appearance: none;
+  background: rgba(0, 102, 204, 0.3);
+  border-radius: 4px;
+  outline: none;
+}
+
+input[type="range"]::-webkit-slider-thumb {
+  -webkit-appearance: none;
+  width: 16px;
+  height: 16px;
+  border-radius: 50%;
+  background: #4db8ff;
+  cursor: pointer;
+  box-shadow: 0 0 10px #4db8ff;
+}
+
+.status-message {
+  position: absolute;
+  top: 20px;
+  right: 260px;
+  background-color: rgba(10, 10, 30, 0.85);
+  border-radius: 10px;
+  padding: 10px 15px;
+  z-index: 10;
+  box-shadow: 0 0 20px rgba(0, 150, 255, 0.3);
+  border: 1px solid rgba(0, 150, 255, 0.2);
+  font-size: 0.9rem;
+  display: none;
+  backdrop-filter: blur(5px);
+}
+
+.status-message.success {
+  color: #44ff44;
+  border-left: 3px solid #44ff44;
+}
+
+.status-message.warning {
+  color: #ffff44;
+  border-left: 3px solid #ffff44;
+}
+
+.status-message.error {
+  color: #ff4444;
+  border-left: 3px solid #ff4444;
+}
+
+.tooltip {
+  position: absolute;
+  background-color: rgba(10, 10, 30, 0.95);
+  border: 1px solid #4db8ff;
+  border-radius: 5px;
+  padding: 5px 10px;
+  font-size: 0.8rem;
+  color: #fff;
+  pointer-events: none;
+  z-index: 100;
+  box-shadow: 0 0 10px rgba(77, 184, 255, 0.3);
+  display: none;
+  user-select: none;
+}
+
+/* Control Toolbar - Stellarium/Star Walk style */
+#control-toolbar {
+  position: relative;
+  bottom: auto;
+  right: auto;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 12px;
+  background: rgba(10, 10, 30, 0.9);
+  border-radius: 999px;
+  padding: 10px 14px;
+  border: 1px solid rgba(77, 184, 255, 0.3);
+  box-shadow: 0 0 20px rgba(77, 184, 255, 0.2);
+  transition: all 0.3s ease;
+}
+
+.toolbar-items {
+  display: flex;
+  gap: 6px;
+  align-items: center;
+  flex-wrap: nowrap;
+}
+
+.toolbar-divider {
+  width: 1px;
+  height: 28px;
+  background: rgba(77, 184, 255, 0.28);
+  flex-shrink: 0;
+}
+
+.toolbar-btn {
+  position: relative;
+  width: 28px;
+  height: 28px;
+  border: none;
+  border-radius: 50%;
+  background: rgba(77, 184, 255, 0.15);
+  color: #4db8ff;
+  font-size: 14px;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  transition: all 0.2s ease;
+  box-sizing: border-box;
+  padding: 0;
+  margin: 0;
+}
+
+.toolbar-btn:hover {
+  background: rgba(77, 184, 255, 0.35);
+  transform: scale(1.1);
+  box-shadow: 0 0 15px rgba(77, 184, 255, 0.5);
+}
+
+.toolbar-btn:active {
+  transform: scale(0.95);
+}
+
+.toolbar-btn.active {
+  background: rgba(77, 184, 255, 0.4);
+  box-shadow: 0 0 10px rgba(77, 184, 255, 0.4) inset;
+}
+
+.toolbar-btn .icon {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.toolbar-btn svg {
+  width: 18px;
+  height: 18px;
+  stroke: currentColor;
+  stroke-width: 2.1;
+  fill: none;
+  stroke-linecap: round;
+  stroke-linejoin: round;
+}
+
+#rotate-toggle .icon-play,
+#rotate-toggle.is-stopped .icon-pause {
+  display: none;
+}
+
+#rotate-toggle.is-stopped .icon-play {
+  display: inline-flex;
+}
+
+#container.layout-expanded #info-panel {
+  top: 20px;
+  left: 20px;
+  transform: translate(calc(-100% + 20px), calc(-100% + 20px));
+}
+
+#container.layout-expanded #coordinates-display {
+  top: 20px;
+  right: 20px;
+  transform: translate(calc(100% - 20px), calc(-100% + 20px));
+}
+
+#container.layout-expanded #legend {
+  left: 20px;
+  bottom: 20px;
+  transform: translate(calc(-100% + 20px), calc(100% - 20px));
+}
+
+#container.layout-expanded #earth-stats {
+  right: 20px;
+  bottom: 20px;
+  transform: translate(calc(100% - 20px), calc(100% - 20px));
+}
+
+#container.layout-expanded #right-toolbar-group {
+  bottom: 20px;
+  transform: translateX(-50%);
+}
+
+.toolbar-btn .tooltip {
+  position: absolute;
+  bottom: 50px;
+  left: 50%;
+  transform: translateX(-50%);
+  background: rgba(10, 10, 30, 0.95);
+  color: #fff;
+  padding: 6px 12px;
+  border-radius: 6px;
+  font-size: 12px;
+  white-space: nowrap;
+  opacity: 0;
+  visibility: hidden;
+  transition: all 0.2s ease;
+  border: 1px solid rgba(77, 184, 255, 0.4);
+  pointer-events: none;
+  z-index: 100;
+}
+
+.toolbar-btn:hover .tooltip {
+  opacity: 1;
+  visibility: visible;
+  bottom: 52px;
+}
+
+.toolbar-btn .tooltip::after {
+  content: '';
+  position: absolute;
+  top: 100%;
+  left: 50%;
+  transform: translateX(-50%);
+  border: 6px solid transparent;
+  border-top-color: rgba(77, 184, 255, 0.4);
+}
diff --git a/frontend/public/earth/_backup/dock-centered-20260326/controls.js b/frontend/public/earth/_backup/dock-centered-20260326/controls.js
new file mode 100644
index 00000000..81333aa4
--- /dev/null
+++ b/frontend/public/earth/_backup/dock-centered-20260326/controls.js
@@ -0,0 +1,421 @@
+// controls.js - Zoom, rotate and toggle controls
+
+import { CONFIG, EARTH_CONFIG } from "./constants.js";
+import { updateZoomDisplay, showStatusMessage } from "./ui.js";
+import { toggleTerrain } from "./earth.js";
+import { reloadData, clearLockedObject } from "./main.js";
+import {
+  toggleSatellites,
+  toggleTrails,
+  getShowSatellites,
+  getSatelliteCount,
+} from "./satellites.js";
+import { toggleCables, getShowCables } from "./cables.js";
+
+export let autoRotate = true;
+export let zoomLevel = 1.0;
+export let showTerrain = false;
+export let isDragging = false;
+export let layoutExpanded = false;
+
+let earthObj = null;
+let listeners = [];
+let cleanupFns = [];
+
+function bindListener(element, eventName, handler, options) {
+  if (!element) return;
+  element.addEventListener(eventName, handler, options);
+  listeners.push(() =>
+    element.removeEventListener(eventName, handler, options),
+  );
+}
+
+function resetCleanup() {
+  cleanupFns.forEach((cleanup) => cleanup());
+  cleanupFns = [];
+  listeners.forEach((cleanup) => cleanup());
+  listeners = [];
+}
+
+export function setupControls(camera, renderer, scene, earth) {
+  resetCleanup();
+  earthObj = earth;
+  setupZoomControls(camera);
+  setupWheelZoom(camera, renderer);
+  setupRotateControls(camera, earth);
+  setupTerrainControls();
+}
+
+function setupZoomControls(camera) {
+  let zoomInterval = null;
+  let holdTimeout = null;
+  let startTime = 0;
+  const HOLD_THRESHOLD = 150;
+  const LONG_PRESS_TICK = 50;
+  const CLICK_STEP = 10;
+
+  const MIN_PERCENT = CONFIG.minZoom * 100;
+  const MAX_PERCENT = CONFIG.maxZoom * 100;
+
+  function doZoomStep(direction) {
+    let currentPercent = Math.round(zoomLevel * 100);
+    let newPercent =
+      direction > 0 ? currentPercent + CLICK_STEP : currentPercent - CLICK_STEP;
+
+    if (newPercent > MAX_PERCENT) newPercent = MAX_PERCENT;
+    if (newPercent < MIN_PERCENT) newPercent = MIN_PERCENT;
+
+    zoomLevel = newPercent / 100;
+    applyZoom(camera);
+  }
+
+  function doContinuousZoom(direction) {
+    let currentPercent = Math.round(zoomLevel * 100);
+    let newPercent = direction > 0 ? currentPercent + 1 : currentPercent - 1;
+
+    if (newPercent > MAX_PERCENT) newPercent = MAX_PERCENT;
+    if (newPercent < MIN_PERCENT) newPercent = MIN_PERCENT;
+
+    zoomLevel = newPercent / 100;
+    applyZoom(camera);
+  }
+
+  function startContinuousZoom(direction) {
+    doContinuousZoom(direction);
+    zoomInterval = window.setInterval(() => {
+      doContinuousZoom(direction);
+    }, LONG_PRESS_TICK);
+  }
+
+  function stopZoom() {
+    if (zoomInterval) {
+      clearInterval(zoomInterval);
+      zoomInterval = null;
+    }
+    if (holdTimeout) {
+      clearTimeout(holdTimeout);
+      holdTimeout = null;
+    }
+  }
+
+  function handleMouseDown(direction) {
+    startTime = Date.now();
+    stopZoom();
+    holdTimeout = window.setTimeout(() => {
+      startContinuousZoom(direction);
+    }, HOLD_THRESHOLD);
+  }
+
+  function handleMouseUp(direction) {
+    const heldTime = Date.now() - startTime;
+    stopZoom();
+    if (heldTime < HOLD_THRESHOLD) {
+      doZoomStep(direction);
+    }
+  }
+
+  cleanupFns.push(stopZoom);
+
+  const zoomIn = document.getElementById("zoom-in");
+  const zoomOut = document.getElementById("zoom-out");
+  const zoomValue = document.getElementById("zoom-value");
+
+  bindListener(zoomIn, "mousedown", () => handleMouseDown(1));
+  bindListener(zoomIn, "mouseup", () => handleMouseUp(1));
+  bindListener(zoomIn, "mouseleave", stopZoom);
+  bindListener(zoomIn, "touchstart", (e) => {
+    e.preventDefault();
+    handleMouseDown(1);
+  });
+  bindListener(zoomIn, "touchend", () => handleMouseUp(1));
+
+  bindListener(zoomOut, "mousedown", () => handleMouseDown(-1));
+  bindListener(zoomOut, "mouseup", () => handleMouseUp(-1));
+  bindListener(zoomOut, "mouseleave", stopZoom);
+  bindListener(zoomOut, "touchstart", (e) => {
+    e.preventDefault();
+    handleMouseDown(-1);
+  });
+  bindListener(zoomOut, "touchend", () => handleMouseUp(-1));
+
+  bindListener(zoomValue, "click", () => {
+    const startZoomVal = zoomLevel;
+    const targetZoom = 1.0;
+    const startDistance = CONFIG.defaultCameraZ / startZoomVal;
+    const targetDistance = CONFIG.defaultCameraZ / targetZoom;
+
+    animateValue(
+      0,
+      1,
+      600,
+      (progress) => {
+        const ease = 1 - Math.pow(1 - progress, 3);
+        zoomLevel = startZoomVal + (targetZoom - startZoomVal) * ease;
+        camera.position.z = CONFIG.defaultCameraZ / zoomLevel;
+        const distance =
+          startDistance + (targetDistance - startDistance) * ease;
+        updateZoomDisplay(zoomLevel, distance.toFixed(0));
+      },
+      () => {
+        zoomLevel = 1.0;
+        showStatusMessage("缩放已重置到100%", "info");
+      },
+    );
+  });
+}
+
+function setupWheelZoom(camera, renderer) {
+  bindListener(
+    renderer?.domElement,
+    "wheel",
+    (e) => {
+      e.preventDefault();
+      if (e.deltaY < 0) {
+        zoomLevel = Math.min(zoomLevel + 0.1, CONFIG.maxZoom);
+      } else {
+        zoomLevel = Math.max(zoomLevel - 0.1, CONFIG.minZoom);
+      }
+      applyZoom(camera);
+    },
+    { passive: false },
+  );
+}
+
+function applyZoom(camera) {
+  camera.position.z = CONFIG.defaultCameraZ / zoomLevel;
+  const distance = camera.position.z.toFixed(0);
+  updateZoomDisplay(zoomLevel, distance);
+}
+
+function animateValue(start, end, duration, onUpdate, onComplete) {
+  const startTime = performance.now();
+
+  function update(currentTime) {
+    const elapsed = currentTime - startTime;
+    const progress = Math.min(elapsed / duration, 1);
+    const easeProgress = 1 - Math.pow(1 - progress, 3);
+
+    const current = start + (end - start) * easeProgress;
+    onUpdate(current);
+
+    if (progress < 1) {
+      requestAnimationFrame(update);
+    } else if (onComplete) {
+      onComplete();
+    }
+  }
+
+  requestAnimationFrame(update);
+}
+
+export function resetView(camera) {
+  if (!earthObj) return;
+
+  function animateToView(targetLat, targetLon, targetRotLon) {
+    const latRot = (targetLat * Math.PI) / 180;
+    const targetRotX =
+      EARTH_CONFIG.tiltRad + latRot * EARTH_CONFIG.latCoefficient;
+    const targetRotY = -((targetRotLon * Math.PI) / 180);
+
+    const startRotX = earthObj.rotation.x;
+    const startRotY = earthObj.rotation.y;
+    const startZoom = zoomLevel;
+    const targetZoom = 1.0;
+
+    animateValue(
+      0,
+      1,
+      800,
+      (progress) => {
+        const ease = 1 - Math.pow(1 - progress, 3);
+        earthObj.rotation.x = startRotX + (targetRotX - startRotX) * ease;
+        earthObj.rotation.y = startRotY + (targetRotY - startRotY) * ease;
+
+        zoomLevel = startZoom + (targetZoom - startZoom) * ease;
+        camera.position.z = CONFIG.defaultCameraZ / zoomLevel;
+        updateZoomDisplay(zoomLevel, camera.position.z.toFixed(0));
+      },
+      () => {
+        zoomLevel = 1.0;
+        showStatusMessage("视角已重置", "info");
+      },
+    );
+  }
+
+  if (navigator.geolocation) {
+    navigator.geolocation.getCurrentPosition(
+      (pos) =>
+        animateToView(
+          pos.coords.latitude,
+          pos.coords.longitude,
+          -pos.coords.longitude,
+        ),
+      () =>
+        animateToView(
+          EARTH_CONFIG.chinaLat,
+          EARTH_CONFIG.chinaLon,
+          EARTH_CONFIG.chinaRotLon,
+        ),
+      { timeout: 5000, enableHighAccuracy: false },
+    );
+  } else {
+    animateToView(
+      EARTH_CONFIG.chinaLat,
+      EARTH_CONFIG.chinaLon,
+      EARTH_CONFIG.chinaRotLon,
+    );
+  }
+
+  clearLockedObject();
+}
+
+function setupRotateControls(camera) {
+  const rotateBtn = document.getElementById("rotate-toggle");
+  const resetViewBtn = document.getElementById("reset-view");
+
+  bindListener(rotateBtn, "click", () => {
+    const isRotating = toggleAutoRotate();
+    showStatusMessage(isRotating ? "自动旋转已开启" : "自动旋转已暂停", "info");
+  });
+
+  updateRotateUI();
+
+  bindListener(resetViewBtn, "click", () => {
+    resetView(camera);
+  });
+}
+
+function setupTerrainControls() {
+  const container = document.getElementById("container");
+  const terrainBtn = document.getElementById("toggle-terrain");
+  const satellitesBtn = document.getElementById("toggle-satellites");
+  const trailsBtn = document.getElementById("toggle-trails");
+  const cablesBtn = document.getElementById("toggle-cables");
+  const layoutBtn = document.getElementById("layout-toggle");
+  const reloadBtn = document.getElementById("reload-data");
+
+  if (trailsBtn) {
+    trailsBtn.classList.add("active");
+    const tooltip = trailsBtn.querySelector(".tooltip");
+    if (tooltip) tooltip.textContent = "隐藏轨迹";
+  }
+
+  bindListener(terrainBtn, "click", function () {
+    showTerrain = !showTerrain;
+    toggleTerrain(showTerrain);
+    this.classList.toggle("active", showTerrain);
+    const tooltip = this.querySelector(".tooltip");
+    if (tooltip) tooltip.textContent = showTerrain ? "隐藏地形" : "显示地形";
+    const terrainStatus = document.getElementById("terrain-status");
+    if (terrainStatus)
+      terrainStatus.textContent = showTerrain ? "开启" : "关闭";
+    showStatusMessage(showTerrain ? "地形已显示" : "地形已隐藏", "info");
+  });
+
+  bindListener(satellitesBtn, "click", function () {
+    const showSats = !getShowSatellites();
+    if (!showSats) {
+      clearLockedObject();
+    }
+    toggleSatellites(showSats);
+    this.classList.toggle("active", showSats);
+    const tooltip = this.querySelector(".tooltip");
+    if (tooltip) tooltip.textContent = showSats ? "隐藏卫星" : "显示卫星";
+    const satelliteCountEl = document.getElementById("satellite-count");
+    if (satelliteCountEl)
+      satelliteCountEl.textContent = getSatelliteCount() + " 颗";
+    showStatusMessage(showSats ? "卫星已显示" : "卫星已隐藏", "info");
+  });
+
+  bindListener(trailsBtn, "click", function () {
+    const isActive = this.classList.contains("active");
+    const nextShowTrails = !isActive;
+    toggleTrails(nextShowTrails);
+    this.classList.toggle("active", nextShowTrails);
+    const tooltip = this.querySelector(".tooltip");
+    if (tooltip) tooltip.textContent = nextShowTrails ? "隐藏轨迹" : "显示轨迹";
+    showStatusMessage(nextShowTrails ? "轨迹已显示" : "轨迹已隐藏", "info");
+  });
+
+  bindListener(cablesBtn, "click", function () {
+    const showNextCables = !getShowCables();
+    if (!showNextCables) {
+      clearLockedObject();
+    }
+    toggleCables(showNextCables);
+    this.classList.toggle("active", showNextCables);
+    const tooltip = this.querySelector(".tooltip");
+    if (tooltip) tooltip.textContent = showNextCables ? "隐藏线缆" : "显示线缆";
+    showStatusMessage(showNextCables ? "线缆已显示" : "线缆已隐藏", "info");
+  });
+
+  bindListener(reloadBtn, "click", async () => {
+    await reloadData();
+  });
+
+  bindListener(layoutBtn, "click", () => {
+    const expanded = toggleLayoutExpanded(container);
+    showStatusMessage(expanded ? "布局已最大化" : "布局已恢复", "info");
+  });
+
+  updateLayoutUI(container);
+}
+
+export function teardownControls() {
+  resetCleanup();
+}
+
+export function getAutoRotate() {
+  return autoRotate;
+}
+
+function updateRotateUI() {
+  const btn = document.getElementById("rotate-toggle");
+  if (btn) {
+    btn.classList.toggle("active", autoRotate);
+    btn.classList.toggle("is-stopped", !autoRotate);
+    const tooltip = btn.querySelector(".tooltip");
+    if (tooltip) tooltip.textContent = autoRotate ? "暂停旋转" : "开始旋转";
+  }
+}
+
+export function setAutoRotate(value) {
+  autoRotate = value;
+  updateRotateUI();
+}
+
+export function toggleAutoRotate() {
+  autoRotate = !autoRotate;
+  updateRotateUI();
+  clearLockedObject();
+  return autoRotate;
+}
+
+export function getZoomLevel() {
+  return zoomLevel;
+}
+
+export function getShowTerrain() {
+  return showTerrain;
+}
+
+function updateLayoutUI(container) {
+  if (container) {
+    container.classList.toggle("layout-expanded", layoutExpanded);
+  }
+
+  const btn = document.getElementById("layout-toggle");
+  if (btn) {
+    btn.classList.toggle("active", layoutExpanded);
+    const tooltip = btn.querySelector(".tooltip");
+    const nextLabel = layoutExpanded ? "恢复布局" : "最大化布局";
+    btn.title = nextLabel;
+    if (tooltip) tooltip.textContent = nextLabel;
+  }
+}
+
+function toggleLayoutExpanded(container) {
+  layoutExpanded = !layoutExpanded;
+  updateLayoutUI(container);
+  return layoutExpanded;
+}
diff --git a/frontend/public/earth/_backup/dock-centered-20260326/index.html b/frontend/public/earth/_backup/dock-centered-20260326/index.html
new file mode 100644
index 00000000..476511b6
--- /dev/null
+++ b/frontend/public/earth/_backup/dock-centered-20260326/index.html
@@ -0,0 +1,227 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>智能星球计划 - 现实层宇宙全息感知</title>
+  <script type="importmap">
+  {
+    "imports": {
+      "three": "https://esm.sh/three@0.128.0",
+      "simplex-noise": "https://esm.sh/simplex-noise@4.0.1",
+      "satellite.js": "https://esm.sh/satellite.js@5.0.0"
+    }
+  }
+  </script>
+  <link rel="stylesheet" href="css/base.css">
+  <link rel="stylesheet" href="css/info-panel.css">
+  <link rel="stylesheet" href="css/coordinates-display.css">
+  <link rel="stylesheet" href="css/legend.css">
+  <link rel="stylesheet" href="css/earth-stats.css">
+</head>
+<body>
+  <div id="container">
+    <div id="info-panel">
+      <h1>智能星球计划</h1>
+      <div class="subtitle">现实层宇宙全息感知系统 | 卫星 · 海底光缆 · 算力基础设施</div>
+      
+      <div id="info-card" class="info-card" style="display: none;">
+        <div class="info-card-header">
+          <span class="info-card-icon" id="info-card-icon">🛰️</span>
+          <h3 id="info-card-title">详情</h3>
+        </div>
+        <div id="info-card-content"></div>
+      </div>
+      
+      <div id="error-message" class="error-message"></div>
+    </div>
+
+    <div id="right-toolbar-group">
+      <div id="control-toolbar">
+        <div class="toolbar-items">
+          <button id="layout-toggle" class="toolbar-btn" title="最大化布局">
+            <span class="icon" aria-hidden="true">
+              <svg viewBox="0 0 24 24">
+                <path d="M9 9H5V5"></path>
+                <path d="M15 9h4V5"></path>
+                <path d="M9 15H5v4"></path>
+                <path d="M15 15h4v4"></path>
+                <path d="M5 5l5 5"></path>
+                <path d="M19 5l-5 5"></path>
+                <path d="M5 19l5-5"></path>
+                <path d="M19 19l-5-5"></path>
+              </svg>
+            </span>
+            <span class="tooltip">最大化布局</span>
+          </button>
+          <button id="rotate-toggle" class="toolbar-btn" title="自动旋转">
+            <span class="icon rotate-icon icon-pause" aria-hidden="true">
+              <svg viewBox="0 0 24 24">
+                <path d="M9 6v12"></path>
+                <path d="M15 6v12"></path>
+              </svg>
+            </span>
+            <span class="icon rotate-icon icon-play" aria-hidden="true">
+              <svg viewBox="0 0 24 24">
+                <path d="M8 6.5v11l9-5.5z" fill="currentColor" stroke="none"></path>
+              </svg>
+            </span>
+            <span class="tooltip">自动旋转</span>
+          </button>
+          <button id="toggle-cables" class="toolbar-btn active" title="显示/隐藏线缆">
+            <span class="icon" aria-hidden="true">
+              <svg viewBox="0 0 24 24">
+                <circle cx="12" cy="12" r="6.5"></circle>
+                <path d="M5.8 12h12.4"></path>
+                <path d="M12 5.8a8.5 8.5 0 0 1 0 12.4"></path>
+                <path d="M8 16c2-1.8 6-1.8 8 0"></path>
+              </svg>
+            </span>
+            <span class="tooltip">隐藏线缆</span>
+          </button>
+          <button id="toggle-terrain" class="toolbar-btn" title="显示/隐藏地形">
+            <span class="icon" aria-hidden="true">
+              <svg viewBox="0 0 24 24">
+                <path d="M3 18h18"></path>
+                <path d="M4.5 18l5-7 3 4 3.5-6 3.5 9"></path>
+                <path d="M11 18l2-3 1.5 2"></path>
+              </svg>
+            </span>
+            <span class="tooltip">显示/隐藏地形</span>
+          </button>
+          <button id="toggle-satellites" class="toolbar-btn" title="显示/隐藏卫星">
+            <span class="icon" aria-hidden="true">
+              <svg viewBox="0 0 24 24">
+                <rect x="10" y="10" width="4" height="4" rx="0.8"></rect>
+                <rect x="4" y="9" width="4" height="6" rx="0.8"></rect>
+                <rect x="16" y="9" width="4" height="6" rx="0.8"></rect>
+                <path d="M8 12h2"></path>
+                <path d="M14 12h2"></path>
+                <path d="M12 8V6"></path>
+                <path d="M11 6h2"></path>
+                <path d="M12 14v4"></path>
+                <path d="M10 18h4"></path>
+              </svg>
+            </span>
+            <span class="tooltip">显示卫星</span>
+          </button>
+          <button id="toggle-trails" class="toolbar-btn active" title="显示/隐藏轨迹">
+            <span class="icon" aria-hidden="true">
+              <svg viewBox="0 0 24 24">
+                <path d="M5 17h7"></path>
+                <path d="M7 13.5h8"></path>
+                <path d="M10 10h6"></path>
+                <circle cx="17.5" cy="8.5" r="2.2" fill="currentColor" stroke="none"></circle>
+                <path d="M15.8 10.2l2.8-2.8"></path>
+              </svg>
+            </span>
+            <span class="tooltip">隐藏轨迹</span>
+          </button>
+          <button id="reload-data" class="toolbar-btn" title="重新加载数据">
+            <span class="icon" aria-hidden="true">
+              <svg viewBox="0 0 24 24">
+                <path d="M20 5v5h-5"></path>
+                <path d="M20 10a8 8 0 1 0 2 5"></path>
+              </svg>
+            </span>
+            <span class="tooltip">重新加载数据</span>
+          </button>
+        </div>
+        <div class="toolbar-divider" aria-hidden="true"></div>
+        <div id="zoom-toolbar">
+          <button id="zoom-out" class="zoom-btn" title="缩小">−<span class="tooltip">缩小</span></button>
+          <span id="zoom-value" class="zoom-percent" title="重置缩放到100%">100%<span class="tooltip">重置缩放到100%</span></span>
+          <button id="zoom-in" class="zoom-btn" title="放大">+<span class="tooltip">放大</span></button>
+          <button id="reset-view" class="zoom-btn" title="重置视角">
+            <svg viewBox="0 0 24 24" aria-hidden="true">
+              <circle cx="12" cy="12" r="5"></circle>
+              <path d="M12 3v4"></path>
+              <path d="M12 17v4"></path>
+              <path d="M3 12h4"></path>
+              <path d="M17 12h4"></path>
+              <circle cx="12" cy="12" r="1.5" fill="currentColor" stroke="none"></circle>
+            </svg>
+            <span class="tooltip">重置视角</span>
+          </button>
+        </div>
+      </div>
+    </div>
+
+    <div id="coordinates-display">
+      <h3 style="color:#4db8ff; margin-bottom:8px; font-size:1.1rem;">坐标信息</h3>
+      <div class="coord-item">
+        <span class="coord-label">经度:</span>
+        <span id="longitude-value" class="coord-value">0.00°</span>
+      </div>
+      <div class="coord-item">
+        <span class="coord-label">纬度:</span>
+        <span id="latitude-value" class="coord-value">0.00°</span>
+      </div>
+      <div id="zoom-level">缩放: 1.0x</div>
+      <div class="mouse-coords" id="mouse-coords">鼠标位置: 无</div>
+    </div>
+
+    <div id="legend">
+      <h3 style="color:#4db8ff; margin-bottom:10px; font-size:1.1rem;">图例</h3>
+      <div class="legend-item">
+        <div class="legend-color" style="background-color: #ff4444;"></div>
+        <span>Americas II</span>
+      </div>
+      <div class="legend-item">
+        <div class="legend-color" style="background-color: #44ff44;"></div>
+        <span>AU Aleutian A</span>
+      </div>
+      <div class="legend-item">
+        <div class="legend-color" style="background-color: #4444ff;"></div>
+        <span>AU Aleutian B</span>
+      </div>
+      <div class="legend-item">
+        <div class="legend-color" style="background-color: #ffff44;"></div>
+        <span>其他电缆</span>
+      </div>
+    </div>
+
+    <div id="earth-stats">
+      <h3 style="color:#4db8ff; margin-bottom:10px; font-size:1.1rem;">地球信息</h3>
+      <div class="stats-item">
+        <span class="stats-label">电缆系统:</span>
+        <span class="stats-value" id="cable-count">0个</span>
+      </div>
+      <div class="stats-item">
+        <span class="stats-label">状态:</span>
+        <span class="stats-value" id="cable-status-summary">-</span>
+      </div>
+      <div class="stats-item">
+        <span class="stats-label">登陆点:</span>
+        <span class="stats-value" id="landing-point-count">0个</span>
+      </div>
+      <div class="stats-item">
+        <span class="stats-label">地形:</span>
+        <span class="stats-value" id="terrain-status">开启</span>
+      </div>
+      <div class="stats-item">
+        <span class="stats-label">卫星:</span>
+        <span class="stats-value" id="satellite-count">0 颗</span>
+      </div>
+      <div class="stats-item">
+        <span class="stats-label">视角距离:</span>
+        <span class="stats-value" id="camera-distance">300 km</span>
+      </div>
+      <div class="stats-item">
+        <span class="stats-label">纹理质量:</span>
+        <span class="stats-value" id="texture-quality">8K 卫星图</span>
+      </div>
+    </div>
+
+    <div id="loading">
+      <div id="loading-spinner"></div>
+      <div id="loading-title">正在初始化全球态势数据...</div>
+      <div id="loading-subtitle" style="font-size:0.9rem; margin-top:10px; color:#aaa;">同步卫星、海底光缆与登陆点数据</div>
+    </div>
+    <div id="status-message" class="status-message" style="display: none;"></div>
+    <div id="tooltip" class="tooltip"></div>
+  </div>
+
+  <script type="module" src="js/main.js"></script>
+</body>
+</html>
diff --git a/frontend/public/earth/assets/icons/cables.svg b/frontend/public/earth/assets/icons/cables.svg
new file mode 100644
index 00000000..62090bb8
--- /dev/null
+++ b/frontend/public/earth/assets/icons/cables.svg
@@ -0,0 +1,6 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <circle cx="12" cy="12" r="6.75" stroke="#4DB8FF" stroke-width="2.1"/>
+  <path d="M5.75 12H18.25" stroke="#4DB8FF" stroke-width="2.1" stroke-linecap="round"/>
+  <path d="M12 5.8C14.7 7.75 14.7 16.25 12 18.2" stroke="#4DB8FF" stroke-width="2.1" stroke-linecap="round"/>
+  <path d="M8 16C9.95 14.2 14.05 14.2 16 16" stroke="#4DB8FF" stroke-width="2.1" stroke-linecap="round"/>
+</svg>
diff --git a/frontend/public/earth/assets/icons/info.svg b/frontend/public/earth/assets/icons/info.svg
new file mode 100644
index 00000000..32f0c133
--- /dev/null
+++ b/frontend/public/earth/assets/icons/info.svg
@@ -0,0 +1,5 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <circle cx="12" cy="12" r="8" stroke="#4DB8FF" stroke-width="2.2"/>
+  <path d="M12 10V16" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <circle cx="12" cy="7.25" r="1.25" fill="#4DB8FF"/>
+</svg>
diff --git a/frontend/public/earth/assets/icons/layout-collapse.svg b/frontend/public/earth/assets/icons/layout-collapse.svg
new file mode 100644
index 00000000..f5fa1845
--- /dev/null
+++ b/frontend/public/earth/assets/icons/layout-collapse.svg
@@ -0,0 +1,10 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <path d="M9 9L5 5" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <path d="M5 8V5H8" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/>
+  <path d="M15 9L19 5" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <path d="M16 5H19V8" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/>
+  <path d="M9 15L5 19" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <path d="M5 16V19H8" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/>
+  <path d="M15 15L19 19" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <path d="M16 19H19V16" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/frontend/public/earth/assets/icons/layout.svg b/frontend/public/earth/assets/icons/layout.svg
new file mode 100644
index 00000000..87936404
--- /dev/null
+++ b/frontend/public/earth/assets/icons/layout.svg
@@ -0,0 +1,10 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <path d="M6 9.2L9.2 9.2L9.2 6" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/>
+  <path d="M18 9.2L14.8 9.2L14.8 6" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/>
+  <path d="M6 14.8L9.2 14.8L9.2 18" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/>
+  <path d="M18 14.8L14.8 14.8L14.8 18" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/>
+  <path d="M6 6L10 10" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <path d="M18 6L14 10" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <path d="M6 18L10 14" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <path d="M18 18L14 14" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+</svg>
diff --git a/frontend/public/earth/assets/icons/pause.svg b/frontend/public/earth/assets/icons/pause.svg
new file mode 100644
index 00000000..fb64ef64
--- /dev/null
+++ b/frontend/public/earth/assets/icons/pause.svg
@@ -0,0 +1,4 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <path d="M9 6.25V17.75" stroke="#4DB8FF" stroke-width="2.4" stroke-linecap="round"/>
+  <path d="M15 6.25V17.75" stroke="#4DB8FF" stroke-width="2.4" stroke-linecap="round"/>
+</svg>
diff --git a/frontend/public/earth/assets/icons/play.svg b/frontend/public/earth/assets/icons/play.svg
new file mode 100644
index 00000000..9c6738f8
--- /dev/null
+++ b/frontend/public/earth/assets/icons/play.svg
@@ -0,0 +1,3 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <path d="M8.5 6.5L17.5 12L8.5 17.5V6.5Z" fill="#4DB8FF"/>
+</svg>
diff --git a/frontend/public/earth/assets/icons/reload.svg b/frontend/public/earth/assets/icons/reload.svg
new file mode 100644
index 00000000..59ff89a2
--- /dev/null
+++ b/frontend/public/earth/assets/icons/reload.svg
@@ -0,0 +1,6 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <path d="M6.8 12.6C6.8 8.95 9.75 6 13.4 6C14.9 6 16.24 6.46 17.3 7.28" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <path d="M18.85 10.45C19.2 11.15 19.4 11.95 19.4 12.8C19.4 16.45 16.45 19.4 12.8 19.4C10.05 19.4 7.69 17.72 6.7 15.33" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <path d="M15.9 5.95H19.2V9.25" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/>
+  <path d="M19.2 5.95L16.7 8.45" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+</svg>
diff --git a/frontend/public/earth/assets/icons/reset-view.svg b/frontend/public/earth/assets/icons/reset-view.svg
new file mode 100644
index 00000000..987b3ca7
--- /dev/null
+++ b/frontend/public/earth/assets/icons/reset-view.svg
@@ -0,0 +1,8 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <circle cx="12" cy="12" r="5" stroke="#4DB8FF" stroke-width="2.2"/>
+  <path d="M12 3V6.5" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <path d="M12 17.5V21" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <path d="M3 12H6.5" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <path d="M17.5 12H21" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <circle cx="12" cy="12" r="1.45" fill="#4DB8FF"/>
+</svg>
diff --git a/frontend/public/earth/assets/icons/satellite.svg b/frontend/public/earth/assets/icons/satellite.svg
new file mode 100644
index 00000000..a8f3415f
--- /dev/null
+++ b/frontend/public/earth/assets/icons/satellite.svg
@@ -0,0 +1,11 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <rect x="10" y="10" width="4" height="4" rx="0.8" stroke="#4DB8FF" stroke-width="2"/>
+  <rect x="4" y="9" width="4" height="6" rx="0.8" stroke="#4DB8FF" stroke-width="2"/>
+  <rect x="16" y="9" width="4" height="6" rx="0.8" stroke="#4DB8FF" stroke-width="2"/>
+  <path d="M8 12H10" stroke="#4DB8FF" stroke-width="2" stroke-linecap="round"/>
+  <path d="M14 12H16" stroke="#4DB8FF" stroke-width="2" stroke-linecap="round"/>
+  <path d="M12 8V6" stroke="#4DB8FF" stroke-width="2" stroke-linecap="round"/>
+  <path d="M10.75 6H13.25" stroke="#4DB8FF" stroke-width="2" stroke-linecap="round"/>
+  <path d="M12 14V18" stroke="#4DB8FF" stroke-width="2" stroke-linecap="round"/>
+  <path d="M10.25 18H13.75" stroke="#4DB8FF" stroke-width="2" stroke-linecap="round"/>
+</svg>
diff --git a/frontend/public/earth/assets/icons/search.svg b/frontend/public/earth/assets/icons/search.svg
new file mode 100644
index 00000000..0804dceb
--- /dev/null
+++ b/frontend/public/earth/assets/icons/search.svg
@@ -0,0 +1,4 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <circle cx="10.5" cy="10.5" r="5.75" stroke="#4DB8FF" stroke-width="2.2"/>
+  <path d="M15.2 15.2L19.25 19.25" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+</svg>
diff --git a/frontend/public/earth/assets/icons/terrain.svg b/frontend/public/earth/assets/icons/terrain.svg
new file mode 100644
index 00000000..54e1f4b7
--- /dev/null
+++ b/frontend/public/earth/assets/icons/terrain.svg
@@ -0,0 +1,5 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <path d="M3 18H21" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <path d="M4.5 18L9.5 11L12.5 15L16 9L19.5 18" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/>
+  <path d="M11.25 18L13.05 15.35L14.55 17.25" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/frontend/public/earth/assets/icons/trails.svg b/frontend/public/earth/assets/icons/trails.svg
new file mode 100644
index 00000000..025eb143
--- /dev/null
+++ b/frontend/public/earth/assets/icons/trails.svg
@@ -0,0 +1,7 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <path d="M5 17H12" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <path d="M7 13.5H15" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <path d="M10 10H16" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <circle cx="17.5" cy="8.5" r="2.2" fill="#4DB8FF"/>
+  <path d="M15.8 10.2L18.55 7.45" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+</svg>
diff --git a/frontend/public/earth/assets/icons/zoom.svg b/frontend/public/earth/assets/icons/zoom.svg
new file mode 100644
index 00000000..34efeff4
--- /dev/null
+++ b/frontend/public/earth/assets/icons/zoom.svg
@@ -0,0 +1,6 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <circle cx="10.5" cy="10.5" r="5.75" stroke="#4DB8FF" stroke-width="2.2"/>
+  <path d="M15.25 15.25L19.25 19.25" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <path d="M10.5 8V13" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+  <path d="M8 10.5H13" stroke="#4DB8FF" stroke-width="2.2" stroke-linecap="round"/>
+</svg>