diff --git a/js/enemies.js b/js/enemies.js
index cadee3b..b420432 100644
--- a/js/enemies.js
+++ b/js/enemies.js
@@ -195,15 +195,15 @@ function startBoss(){
   const hpM=(G.diff===1?BAL.hard.hp:1)*(1+0.35*cyc)*(G.mode==="endless"?1+0.55*G.bossN+0.1*G.wave:1+0.12*(G.stage-1))*(G.mode==="rush"?1:1);   // Boss挑战模式血量倍数（调平衡改这里）
   G.boss={idx,x:W/2,y:-60,ty:64,hp:b.hp*hpM,maxhp:b.hp*hpM,r:(b.rr?b.rr[0]:b.r),ry:(b.ryy?b.ryy[0]:undefined),t:0,phase:0,transT:0,
     col:b.col,name:b.name,sub:b.sub,fireM:BAL.fireMul(n)*(G.diff===1?BAL.hard.fire:1),dead:false,
-    mainT:100,minorT:9999,minorSet:[],rerollT:340,ax:W/2,ay:64};
+    mainT:100,minorT:9999,minorSet:[],rerollT:340,ax:W/2,ay:64,mt:0,landed:false};
   G.bossN++;SFX.warn();MUS.start(true);
   banner("WARNING — "+b.name,"#ff5566",150);
 }
 function updateBoss(){
   const b=G.boss;if(!b)return;
   b.t++;
-  if(b.y<b.ty){b.y+=1.2;b.x=W/2;return;}
-  if(b.arr===undefined)b.arr=b.t; // 降落结束时刻，正弦从0起振，杜绝瞬移
+  if(!b.landed){if(b.y<b.ty){b.y+=1.2;b.x=W/2;return;}b.landed=true;}   // 入场只跑一次：到位后锁定，防正弦浮沉跌回触发重置
+  // b.mt：移动时钟，只在常规移动时推进——冲撞/变身期间冻结，恢复时位置连续不瞬移
   const def=BOSSES[b.idx];
   // —— 阶段检测与变形（锁血转场：清弹+停火+播动画） ——
   const ratio=b.hp/b.maxhp,thr=def.phases===2?[0.5]:[0.66,0.33];
@@ -231,8 +231,9 @@ function updateBoss(){
   }
   // —— 常规移动 ——
   if(def.static){b.x+=(W/2-b.x)*0.05;b.y+=(52-b.y)*0.02;}
-  else if(b.idx===3){b.x=W/2+Math.sin((b.t-b.arr)*0.021)*62;b.y=b.ty+Math.sin((b.t-b.arr)*0.013)*15;}   // 暗黑突击：小体型高机动
-  else b.x=W/2+Math.sin((b.t-b.arr)*0.008)*(def.wide?44:70);   // 宽体Boss减小游走幅度，防止巨翼出屏
+  else if(b.idx===3){b.x=W/2+Math.sin(b.mt*0.021)*62;b.y=b.ty+Math.sin(b.mt*0.013)*15;}   // 暗黑突击：小体型高机动
+  else b.x=W/2+Math.sin(b.mt*0.008)*(def.wide?44:70);   // 宽体Boss减小游走幅度，防止巨翼出屏
+  b.mt++;
   const fm=b.fireM*(1+0.22*b.phase);
   if(b.fnT>0)b.fnT--;if(b.plT>0)b.plT--;if(b.eyeT>0)b.eyeT--;if(b.hornT>0)b.hornT--;if(b.laserT>0)b.laserT--;   // 帧级技能计时器
   const lck=(b.laserT||0)>0;   // 巨宽核心激光期间压制其他攻击
@@ -271,8 +272,8 @@ function bossMain(b,def,fm){
       const arms=2+ph;
       for(let arm=0;arm<arms;arm++)for(let i=0;i<2;i++)ebul(b.x,b.y,b.t*0.06+arm*(TAU/arms)+i*0.14,2+0.2*ph,"orbP");
       b.mainT=Math.round(10/fm);break;}
-    case "assault":  // 暗黑突击：启动冲撞
-      b.dashSt={ph:"tele",t:52};b.mainT=9999;break;
+    case "assault":  // 暗黑突击：启动冲撞（锚点记当前位置，冲撞归来后正弦从此继续）
+      b.dashSt={ph:"tele",t:52};b.ax=b.x;b.ay=b.y;b.mainT=9999;break;
     case "piano": {  // 激光钢琴：21键，四种模式轮换——顺扫(逼走位)/反扫/乱序/齐射
       if(!b.keys)b.keys={n:21,seq:[],i:0,t:40,hot:-1,hotT:0,hotList:null,mode:3};
       const ks=b.keys,n=ks.n;