diff --git a/star-raid/js/enemies.js b/star-raid/js/enemies.js
index 4d05471..a173b49 100644
--- a/star-raid/js/enemies.js
+++ b/star-raid/js/enemies.js
@@ -361,7 +361,7 @@ function updateBoss(){
       else if(l>0&&l<60){
         if(p.dead<=0&&Math.abs(p.x-leftX)<14)b.pedLasL=l+1;
         else b.pedLasL=Math.max(0,l-1);
-        if(b.pedLasL>=60){bossBeam(leftX,b.y+10,leftX,H+8,14,"#ff3355",10,40,99999,{b,ox:-(112+off0),oy:10,followX2:true});b.pedLasL=0;b.pedLasLCd=300;SFX.warn();}}}
+        if(b.pedLasL>=60){bossBeam(leftX,b.y+10,leftX,H+8,14,"#ff3355",10,300,99999,{b,ox:-(112+off0),oy:10,followX2:true});b.pedLasL=0;b.pedLasLCd=300;SFX.warn();}}}
     // 右炮
     if((b.pedLasRCd||0)>0){b.pedLasRCd=b.pedLasRCd-1;}
     else{const r=b.pedLasR||0;
@@ -369,7 +369,7 @@ function updateBoss(){
       else if(r>0&&r<60){
         if(p.dead<=0&&Math.abs(p.x-rightX)<14)b.pedLasR=r+1;
         else b.pedLasR=Math.max(0,r-1);
-        if(b.pedLasR>=60){bossBeam(rightX,b.y+10,rightX,H+8,14,"#ff3355",10,40,99999,{b,ox:(112+off0),oy:10,followX2:true});b.pedLasR=0;b.pedLasRCd=300;SFX.warn();}}}
+        if(b.pedLasR>=60){bossBeam(rightX,b.y+10,rightX,H+8,14,"#ff3355",10,300,99999,{b,ox:(112+off0),oy:10,followX2:true});b.pedLasR=0;b.pedLasRCd=300;SFX.warn();}}}
   }
   // —— 主攻击 ——
   b.mainT--;
diff --git a/star-raid/js/render.js b/star-raid/js/render.js
index 16fb0d2..34b01f3 100644
--- a/star-raid/js/render.js
+++ b/star-raid/js/render.js
@@ -224,16 +224,17 @@ function drawBossFx(){
       ctx.beginPath();ctx.moveTo(bm.x1,bm.y1);ctx.lineTo(bm.x2,bm.y2);ctx.stroke();ctx.globalAlpha=1;}}
     else{ctx.globalCompositeOperation="lighter";
       ctx.globalAlpha=clamp(bm.life/10,0,1)*0.85;
-      // 大激光起点扩口半圆：弧线描边风格与激光线完全一致（粗主色弧+细白边弧）
-      if(bm.dmg>=90000){const pR=bm.w*0.5;
-        ctx.strokeStyle=bm.col;ctx.lineWidth=bm.w;
-        ctx.beginPath();ctx.arc(bm.x1,bm.y1+pR,pR,Math.PI,0);ctx.stroke();
+      if(bm.dmg>=90000){   // 大激光：fill实心上半圆+fillRect实心矩形，边缘完美对接
+        const pR=bm.w*0.5;
+        ctx.fillStyle=bm.col;
+        ctx.beginPath();ctx.arc(bm.x1,bm.y1+pR,pR,0,Math.PI,true);ctx.fill();   // 上半圆：顶部=炮口bm.y1，底部直径=bm.y1+pR
+        ctx.fillRect(bm.x1-pR,bm.y1+pR,bm.w,bm.y2-(bm.y1+pR));   // 矩形：从半圆底部向下，宽=直径
+        ctx.fillStyle="#fff";
+        ctx.fillRect(bm.x1-pR/3,bm.y1+pR,pR*2/3,bm.y2-(bm.y1+pR));}   // 白边窄矩形
+      else{ctx.strokeStyle=bm.col;ctx.lineWidth=bm.w;
+        ctx.beginPath();ctx.moveTo(bm.x1,bm.y1);ctx.lineTo(bm.x2,bm.y2);ctx.stroke();
         ctx.strokeStyle="#fff";ctx.lineWidth=Math.max(1,bm.w/3);
-        ctx.beginPath();ctx.arc(bm.x1,bm.y1+pR,pR,Math.PI,0);ctx.stroke();}
-      ctx.strokeStyle=bm.col;ctx.lineWidth=bm.w;
-      ctx.beginPath();ctx.moveTo(bm.x1,bm.y1+bm.w);ctx.lineTo(bm.x2,bm.y2);ctx.stroke();
-      ctx.strokeStyle="#fff";ctx.lineWidth=Math.max(1,bm.w/3);
-      ctx.beginPath();ctx.moveTo(bm.x1,bm.y1+bm.w);ctx.lineTo(bm.x2,bm.y2);ctx.stroke();
+        ctx.beginPath();ctx.moveTo(bm.x1,bm.y1);ctx.lineTo(bm.x2,bm.y2);ctx.stroke();}
       ctx.globalAlpha=1;ctx.globalCompositeOperation="source-over";}
   }
 }