diff --git a/docs/全景视角与移动端缩放说明.md b/docs/全景视角与移动端缩放说明.md
new file mode 100644
index 0000000..3a12ede
--- /dev/null
+++ b/docs/全景视角与移动端缩放说明.md
@@ -0,0 +1,15 @@
+# 全景视角与移动端缩放说明
+
+## 拉近 / 拉远 与 FOV（视野角）
+
+在本项目使用的 Pannellum 里，视角由 **hfov**（水平视野角，单位度）控制。按你的定义：
+
+- **拉近** = hfov **变大** → 视野变宽（例如从 50 调到 90）。
+- **拉远** = hfov **变小** → 视野变窄、看得更近/更局部（例如从 90 调到 40）。
+
+对应到手势：双指**捏合**时 hfov 变大（拉近/视野变宽），双指**张开**时 hfov 变小（拉远/看得更近）。移动端已优化双指缩放的跟手程度。
+
+## 移动端双指缩放优化
+
+- 已把 Pannellum 内双指 pinch 的缩放系数从 **0.1** 调整为 **0.22**，相同手指移动距离下 hfov 变化更大，相机更跟手。
+- 移动端 hfov 范围：**minHfov 28**（最大拉近）、**maxHfov 105**（最大拉远），可在 `index.html` / `src/main.js` 的 `buildViewer` 里按需修改。
diff --git a/lib/pannellum.js b/lib/pannellum.js
index 415c1b6..6bcec4b 100644
--- a/lib/pannellum.js
+++ b/lib/pannellum.js
@@ -52,7 +52,7 @@ p;M.style.display="none";B("error",a)}function ja(a){var b=Q(a);fa.style.left=b.
 Q(a);if(b.hotSpotDebug){var n=ta(a);console.log("Pitch: "+n[0]+", Yaw: "+n[1]+", Center Pitch: "+b.pitch+", Center Yaw: "+b.yaw+", HFOV: "+b.hfov)}t();Da();b.roll=0;w.hfov=0;ha=!0;N=Date.now();xa=f.x;ya=f.y;Oa=b.yaw;Pa=b.pitch;J.classList.add("pnlm-grabbing");J.classList.remove("pnlm-grab");B("mousedown",a);G()}}function Ja(a){b.minHfov===b.hfov?da.setHfov(ra,1E3):(a=ta(a),da.lookAt(a[0],a[1],b.minHfov,1E3))}function ta(a){var f=Q(a);a=C.getCanvas();var n=a.clientWidth,c=a.clientHeight;a=f.x/n*2-
 1;var c=(1-f.y/c*2)*c/n,d=1/Math.tan(b.hfov*Math.PI/360),e=Math.sin(b.pitch*Math.PI/180),g=Math.cos(b.pitch*Math.PI/180),f=d*g-c*e,n=Math.sqrt(a*a+f*f),c=180*Math.atan((c*g+d*e)/n)/Math.PI;a=180*Math.atan2(a/n,f/n)/Math.PI+b.yaw;-180>a&&(a+=360);180<a&&(a-=360);return[c,a]}function ua(a){if(ha&&H){N=Date.now();var f=C.getCanvas(),n=f.clientWidth,f=f.clientHeight;a=Q(a);var c=180*(Math.atan(xa/n*2-1)-Math.atan(a.x/n*2-1))/Math.PI*b.hfov/90+Oa;w.yaw=(c-b.yaw)%360*0.2;b.yaw=c;n=360*Math.atan(Math.tan(b.hfov/
 360*Math.PI)*f/n)/Math.PI;n=180*(Math.atan(a.y/f*2-1)-Math.atan(ya/f*2-1))/Math.PI*n/90+Pa;w.pitch=0.2*(n-b.pitch);b.pitch=n}}function ma(a){ha&&(ha=!1,15<Date.now()-N&&(w.pitch=w.yaw=0),J.classList.add("pnlm-grab"),J.classList.remove("pnlm-grabbing"),N=Date.now(),B("mouseup",a))}function Ka(a){if(H&&b.draggable){t();Da();b.roll=0;w.hfov=0;var f=Q(a.targetTouches[0]);xa=f.x;ya=f.y;if(2==a.targetTouches.length){var n=Q(a.targetTouches[1]);xa+=0.5*(n.x-f.x);ya+=0.5*(n.y-f.y);Ha=Math.sqrt((f.x-n.x)*
-(f.x-n.x)+(f.y-n.y)*(f.y-n.y))}ha=!0;N=Date.now();Oa=b.yaw;Pa=b.pitch;B("touchstart",a);G()}}function la(a){if(b.draggable&&(a.preventDefault(),H&&(N=Date.now()),ha&&H)){var f=Q(a.targetTouches[0]),n=f.x,c=f.y;2==a.targetTouches.length&&-1!=Ha&&(a=Q(a.targetTouches[1]),n+=0.5*(a.x-f.x),c+=0.5*(a.y-f.y),f=Math.sqrt((f.x-a.x)*(f.x-a.x)+(f.y-a.y)*(f.y-a.y)),x(b.hfov+0.1*(Ha-f)),Ha=f);f=b.hfov/360*b.touchPanSpeedCoeffFactor;n=(xa-n)*f+Oa;w.yaw=(n-b.yaw)%360*0.2;b.yaw=n;c=(c-ya)*f+Pa;w.pitch=0.2*(c-b.pitch);
+(f.x-n.x)+(f.y-n.y)*(f.y-n.y))}ha=!0;N=Date.now();Oa=b.yaw;Pa=b.pitch;B("touchstart",a);G()}}function la(a){if(b.draggable&&(a.preventDefault(),H&&(N=Date.now()),ha&&H)){var f=Q(a.targetTouches[0]),n=f.x,c=f.y;2==a.targetTouches.length&&-1!=Ha&&(a=Q(a.targetTouches[1]),n+=0.5*(a.x-f.x),c+=0.5*(a.y-f.y),f=Math.sqrt((f.x-a.x)*(f.x-a.x)+(f.y-a.y)*(f.y-a.y)),x(b.hfov+0.22*(Ha-f)),Ha=f);f=b.hfov/360*b.touchPanSpeedCoeffFactor;n=(xa-n)*f+Oa;w.yaw=(n-b.yaw)%360*0.2;b.yaw=n;c=(c-ya)*f+Pa;w.pitch=0.2*(c-b.pitch);
 b.pitch=c}}function Ea(){ha=!1;150<Date.now()-N&&(w.pitch=w.yaw=0);Ha=-1;N=Date.now();B("touchend",event)}function A(a){"touch"==a.pointerType&&H&&b.draggable&&(ia.push(a.pointerId),za.push({clientX:a.clientX,clientY:a.clientY}),a.targetTouches=za,Ka(a),a.preventDefault())}function c(a){if("touch"==a.pointerType&&b.draggable)for(var f=0;f<ia.length;f++)if(a.pointerId==ia[f]){za[f].clientX=a.clientX;za[f].clientY=a.clientY;a.targetTouches=za;la(a);a.preventDefault();break}}function a(a){if("touch"==
 a.pointerType){for(var b=!1,n=0;n<ia.length;n++)a.pointerId==ia[n]&&(ia[n]=p),ia[n]&&(b=!0);b||(ia=[],za=[],Ea());a.preventDefault()}}function U(a){H&&("fullscreenonly"!=b.mouseZoom||Aa)&&(a.preventDefault(),t(),N=Date.now(),a.wheelDeltaY?(x(b.hfov-0.05*a.wheelDeltaY),w.hfov=0>a.wheelDelta?1:-1):a.wheelDelta?(x(b.hfov-0.05*a.wheelDelta),w.hfov=0>a.wheelDelta?1:-1):a.detail&&(x(b.hfov+1.5*a.detail),w.hfov=0<a.detail?1:-1),G())}function V(a){t();N=Date.now();Da();b.roll=0;var f=a.which||a.keycode;0>
 b.capturedKeyNumbers.indexOf(f)||(a.preventDefault(),27==f?Aa&&h():wa(f,!0))}function $(){for(var a=0;10>a;a++)r[a]=!1}function R(a){var f=a.which||a.keycode;0>b.capturedKeyNumbers.indexOf(f)||(a.preventDefault(),wa(f,!1))}function wa(a,b){var n=!1;switch(a){case 109:case 189:case 17:case 173:r[0]!=b&&(n=!0);r[0]=b;break;case 107:case 187:case 16:case 61:r[1]!=b&&(n=!0);r[1]=b;break;case 38:r[2]!=b&&(n=!0);r[2]=b;break;case 87:r[6]!=b&&(n=!0);r[6]=b;break;case 40:r[3]!=b&&(n=!0);r[3]=b;break;case 83:r[7]!=
diff --git a/public/lib/pannellum.js b/public/lib/pannellum.js
index 415c1b6..6bcec4b 100644
--- a/public/lib/pannellum.js
+++ b/public/lib/pannellum.js
@@ -52,7 +52,7 @@ p;M.style.display="none";B("error",a)}function ja(a){var b=Q(a);fa.style.left=b.
 Q(a);if(b.hotSpotDebug){var n=ta(a);console.log("Pitch: "+n[0]+", Yaw: "+n[1]+", Center Pitch: "+b.pitch+", Center Yaw: "+b.yaw+", HFOV: "+b.hfov)}t();Da();b.roll=0;w.hfov=0;ha=!0;N=Date.now();xa=f.x;ya=f.y;Oa=b.yaw;Pa=b.pitch;J.classList.add("pnlm-grabbing");J.classList.remove("pnlm-grab");B("mousedown",a);G()}}function Ja(a){b.minHfov===b.hfov?da.setHfov(ra,1E3):(a=ta(a),da.lookAt(a[0],a[1],b.minHfov,1E3))}function ta(a){var f=Q(a);a=C.getCanvas();var n=a.clientWidth,c=a.clientHeight;a=f.x/n*2-
 1;var c=(1-f.y/c*2)*c/n,d=1/Math.tan(b.hfov*Math.PI/360),e=Math.sin(b.pitch*Math.PI/180),g=Math.cos(b.pitch*Math.PI/180),f=d*g-c*e,n=Math.sqrt(a*a+f*f),c=180*Math.atan((c*g+d*e)/n)/Math.PI;a=180*Math.atan2(a/n,f/n)/Math.PI+b.yaw;-180>a&&(a+=360);180<a&&(a-=360);return[c,a]}function ua(a){if(ha&&H){N=Date.now();var f=C.getCanvas(),n=f.clientWidth,f=f.clientHeight;a=Q(a);var c=180*(Math.atan(xa/n*2-1)-Math.atan(a.x/n*2-1))/Math.PI*b.hfov/90+Oa;w.yaw=(c-b.yaw)%360*0.2;b.yaw=c;n=360*Math.atan(Math.tan(b.hfov/
 360*Math.PI)*f/n)/Math.PI;n=180*(Math.atan(a.y/f*2-1)-Math.atan(ya/f*2-1))/Math.PI*n/90+Pa;w.pitch=0.2*(n-b.pitch);b.pitch=n}}function ma(a){ha&&(ha=!1,15<Date.now()-N&&(w.pitch=w.yaw=0),J.classList.add("pnlm-grab"),J.classList.remove("pnlm-grabbing"),N=Date.now(),B("mouseup",a))}function Ka(a){if(H&&b.draggable){t();Da();b.roll=0;w.hfov=0;var f=Q(a.targetTouches[0]);xa=f.x;ya=f.y;if(2==a.targetTouches.length){var n=Q(a.targetTouches[1]);xa+=0.5*(n.x-f.x);ya+=0.5*(n.y-f.y);Ha=Math.sqrt((f.x-n.x)*
-(f.x-n.x)+(f.y-n.y)*(f.y-n.y))}ha=!0;N=Date.now();Oa=b.yaw;Pa=b.pitch;B("touchstart",a);G()}}function la(a){if(b.draggable&&(a.preventDefault(),H&&(N=Date.now()),ha&&H)){var f=Q(a.targetTouches[0]),n=f.x,c=f.y;2==a.targetTouches.length&&-1!=Ha&&(a=Q(a.targetTouches[1]),n+=0.5*(a.x-f.x),c+=0.5*(a.y-f.y),f=Math.sqrt((f.x-a.x)*(f.x-a.x)+(f.y-a.y)*(f.y-a.y)),x(b.hfov+0.1*(Ha-f)),Ha=f);f=b.hfov/360*b.touchPanSpeedCoeffFactor;n=(xa-n)*f+Oa;w.yaw=(n-b.yaw)%360*0.2;b.yaw=n;c=(c-ya)*f+Pa;w.pitch=0.2*(c-b.pitch);
+(f.x-n.x)+(f.y-n.y)*(f.y-n.y))}ha=!0;N=Date.now();Oa=b.yaw;Pa=b.pitch;B("touchstart",a);G()}}function la(a){if(b.draggable&&(a.preventDefault(),H&&(N=Date.now()),ha&&H)){var f=Q(a.targetTouches[0]),n=f.x,c=f.y;2==a.targetTouches.length&&-1!=Ha&&(a=Q(a.targetTouches[1]),n+=0.5*(a.x-f.x),c+=0.5*(a.y-f.y),f=Math.sqrt((f.x-a.x)*(f.x-a.x)+(f.y-a.y)*(f.y-a.y)),x(b.hfov+0.22*(Ha-f)),Ha=f);f=b.hfov/360*b.touchPanSpeedCoeffFactor;n=(xa-n)*f+Oa;w.yaw=(n-b.yaw)%360*0.2;b.yaw=n;c=(c-ya)*f+Pa;w.pitch=0.2*(c-b.pitch);
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 a.pointerType){for(var b=!1,n=0;n<ia.length;n++)a.pointerId==ia[n]&&(ia[n]=p),ia[n]&&(b=!0);b||(ia=[],za=[],Ea());a.preventDefault()}}function U(a){H&&("fullscreenonly"!=b.mouseZoom||Aa)&&(a.preventDefault(),t(),N=Date.now(),a.wheelDeltaY?(x(b.hfov-0.05*a.wheelDeltaY),w.hfov=0>a.wheelDelta?1:-1):a.wheelDelta?(x(b.hfov-0.05*a.wheelDelta),w.hfov=0>a.wheelDelta?1:-1):a.detail&&(x(b.hfov+1.5*a.detail),w.hfov=0<a.detail?1:-1),G())}function V(a){t();N=Date.now();Da();b.roll=0;var f=a.which||a.keycode;0>
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