"use strict";
/* ================= 背景：星空与星云 ================= */
const STARS=[[],[],[]];
for(let i=0;i<3;i++)for(let j=0;j<26-i*6;j++)STARS[i].push({x:rnd(W),y:rnd(H),s:(0.35+i*0.4),sz:i===2?2:1,col:i===2?pick(["#aab8d8","#8fa8d8","#c0a8c8"]):"#3f4c74"});
const NEB=["#131c3f","#33102a","#0f2a1c","#101a33","#2a1030","#330f0f"];
let nebY=0,planet=null;
function drawBG(dt){
  ctx.fillStyle="#05070f";ctx.fillRect(0,0,W,H);
  const stage=G?G.stage-1:0,ncol=NEB[clamp(stage,0,5)];
  nebY=(nebY+0.08*dt)%160;
  for(let k=0;k<2;k++){
    const g=ctx.createRadialGradient(W*(k?0.75:0.25),nebY+k*160-160,10,W*(k?0.75:0.25),nebY+k*160-160,130);
    g.addColorStop(0,ncol);g.addColorStop(1,"transparent");
    ctx.globalAlpha=0.38;ctx.fillStyle=g;ctx.fillRect(0,0,W,H);ctx.globalAlpha=1;
  }
  for(let i=0;i<3;i++)for(const s of STARS[i]){
    s.y+=s.s*dt*(G&&G.odActive>0?2:1);if(s.y>H){s.y=-2;s.x=rnd(W);}
    ctx.fillStyle=s.col;ctx.fillRect(s.x,s.y,s.sz,s.sz);
  }
  if(planet){
    planet.y+=0.12*dt;
    if(planet.y>H+40){planet=null;}
    else{
    ctx.globalAlpha=0.5;ctx.fillStyle=planet.col;
    ctx.beginPath();ctx.arc(planet.x,planet.y,planet.r,0,TAU);ctx.fill();
    ctx.globalAlpha=0.25;ctx.fillStyle="#fff";
    ctx.fillRect(planet.x-planet.r,planet.y-2,planet.r*2,1);
    ctx.fillRect(planet.x-planet.r+3,planet.y+4,planet.r*2-6,1);
    ctx.globalAlpha=1;
    }}
  else if(Math.random()<0.001)planet={x:rnd(40,W-40),y:-40,r:rndi(14,26),col:pick(["#4a5a8c","#8c4a5a","#4a8c6e"])};
}
/* ================= Boss 程序化像素绘制 ================= */
function px(x,y,w,h,col){ctx.fillStyle=col;ctx.fillRect(Math.round(x),Math.round(y),w,h);}
function poly(pts,col){ctx.fillStyle=col;ctx.beginPath();ctx.moveTo(pts[0],pts[1]);for(let i=2;i<pts.length;i+=2)ctx.lineTo(pts[i],pts[i+1]);ctx.closePath();ctx.fill();}
function circ(x,y,r,col){ctx.fillStyle=col;ctx.beginPath();ctx.arc(x,y,r,0,TAU);ctx.fill();}
function drawBoss(){
  const b=G.boss;if(!b)return;
  // 变形动画：五个新Boss播专属变身（mp=进度）；其余通用收缩展开 + 白光衰减
  let ph2=b.phase,sc=1,ox=0,oy=0,flashA=0,mp=null;
  if(b.transT>0){const prog=1-b.transT/70;
    ox=rnd(-1.6,1.6);oy=rnd(-1.2,1.2);
    if(b.idx===1||b.idx===3||b.idx===4||b.idx===6||b.idx===7||b.idx===8||b.idx===9){mp=prog;if(prog>0.75)flashA=(1-prog)*1.6;}
    else{sc=prog<0.5?1-0.16*(prog*2):0.84+0.16*((prog-0.5)*2);
      if(prog<0.5)ph2=b.phase-1;
      flashA=prog<0.5?prog*0.8:(1-prog)*0.8;}}
  ctx.save();ctx.translate(Math.round(b.x+ox),Math.round(b.y+oy));
  if(sc!==1)ctx.scale(sc,sc);
  const fl=b.flash>0?"#ffffff":null,t=b.t;
  if(b.idx===0){ // 巡逻巡洋舰
    px(-22,-10,44,20,"#3a4460");px(-18,-14,36,6,"#5b6b8c");px(-14,10,28,5,"#2a3450");
    px(-24,-6,6,12,"#5b6b8c");px(18,-6,6,12,"#5b6b8c");
    px(-25,4,4,6,fl||"#e0393e");px(21,4,4,6,fl||"#e0393e");
    px(-8,-18,16,8,"#5b6b8c");px(-4,-20,8,4,"#3a4460");
    px(-6,-4,12,10,fl||"#ff9a3d");px(-3,-2,6,6,"#fff4d9");
    for(let i=-2;i<=2;i++)px(i*8-1,12,2,3,t%40<20?"#ff5566":"#7a1622");
    px(-22,-10,44,2,"#8c9ab8");
    if(ph2>=1){px(-2,-27,4,8,"#5b6b8c");px(-1,-29,2,3,t%20<10?"#ff5566":"#7a1622");} // 二阶段顶部炮塔
  }else if(b.idx===1){ // 太空原种·装甲蛾兽：三角翼+蜈蚣腹+四红复眼（变形=背甲滑开裂粉肉/腹节伸长/翼膜转红）
    drawProgenitor(b,t,fl,mp!==null?mp:(ph2===0?0:1));
  }else if(b.idx===2){ // 歼灭者
    for(let i=0;i<6;i++){const a=i/6*TAU+t*0.01;
      px(Math.cos(a)*19-3,Math.sin(a)*19-3,6,6,"#5b3a8c");}
    px(-16,-12,32,24,"#2a1f4a");px(-12,-16,24,6,"#4a3a7a");px(-12,10,24,6,"#4a3a7a");
    px(-20,-4,6,8,"#4a3a7a");px(14,-4,6,8,"#4a3a7a");
    px(-6,-6,12,12,fl||"#b05ce8");px(-3,-3,6,6,"#f0d6ff");
    for(let i=0;i<3+ph2;i++){const a=t*0.02+i*TAU/(3+ph2);
      px(Math.cos(a)*26-2,Math.sin(a)*26-2,4,4,t%30<15?"#b05ce8":"#5c2a80");}
  }else if(b.idx===3){ // 暗黑突击：小体型高机动，翼展角15°/45°/70°随阶段展开
    const SW=[15,45,70];
    let swp=SW[Math.min(ph2,2)];
    if(mp!==null){const s0=SW[Math.max(0,b.phase-1)],s1=SW[Math.min(b.phase,2)];swp=s0+(s1-s0)*mp;}
    ctx.scale(0.34,0.34);
    drawAssault(t,fl,swp,Math.min(ph2,2),mp);
  }else if(b.idx===4){ // 激光钢琴：全屏宽半碟要塞（二阶段裂壳露红核）
    drawPiano(b,t,fl,mp!==null?mp:(ph2>=1?1:0));
  }else if(b.idx===5){ // 母巢核心
    for(let i=0;i<8;i++){const a=i/8*TAU+t*0.005;
      px(Math.cos(a)*24-2,Math.sin(a)*24-2,5,5,"#8c5b2a");}
    px(-18,-14,36,28,"#4a3410");px(-14,-18,28,8,"#6e4f1a");px(-14,10,28,8,"#6e4f1a");
    px(-22,-8,5,16,"#6e4f1a");px(17,-8,5,16,"#6e4f1a");
    const pl=8+Math.sin(t*0.1)*2;
    px(-pl/2-3,-pl/2-3,pl+6,pl+6,fl||"#ff9a3d");px(-pl/2,-pl/2,pl,pl,"#fff4d9");
    px(-2,-22,4,6,"#ffcf5c");px(-2,16,4,6,"#ffcf5c");
  }else if(b.idx===6){ // 夺权者X：巨型母舰（二阶段抛侧舱→拉长钻石机身+僚机）
    if(ph2===0||mp!==null){ // P1巨舰主体（变身时收缩淡出）
      const hullA=mp!==null?1-mp:1,hullS=mp!==null?1-mp*0.25:1;
      if(hullA>0.02){ctx.save();ctx.scale(hullS,hullS);ctx.globalAlpha=hullA;
        poly([0,46,-14,8,-22,-30,-9,-42,9,-42,22,-30,14,8],"#d8e4f0");
        poly([0,46,14,8,22,-30,9,-42,0,-42],"#9fb0c6");
        poly([-9,-42,-34,-52,-26,-28,-9,-34],"#aab8cc");poly([9,-42,34,-52,26,-28,9,-34],"#aab8cc");
        circ(0,-16,8,fl||"#43b8ff");circ(0,-16,4,"#bfefff");
        px(-2,-40,4,18,"#43b8ff");px(-2,-4,4,30,"#43b8ff");
        ctx.restore();ctx.globalAlpha=1;}}
    if(ph2===0||mp!==null){ // 侧舱（变身时抛离飞走）
      const jt=mp||0;
      if(jt<0.99)for(const sd of[-1,1]){ctx.save();
        ctx.translate(sd*(37+jt*95),jt*60);ctx.rotate(sd*jt*0.7);ctx.globalAlpha=1-jt*0.8;
        px(-11,-22,22,44,"#aab8cc");px(-11,-22,22,4,"#43b8ff");
        px(-8,18,16,6,"#8a9ab8");
        for(let i=0;i<3;i++)px(-3,-10+i*8,6,4,fl||"#ff3355");
        ctx.restore();ctx.globalAlpha=1;}}
    if(ph2>=1){ // 拉长钻石机身+机翼（二阶段显现）
      const di=mp!==null?mp:1;
      ctx.save();ctx.globalAlpha=di;const ds=0.7+0.3*di;ctx.scale(ds,ds);
      poly([0,58,-13,8,-8,-38,0,-48,8,-38,13,8],"#e8f4ff");
      poly([0,58,13,8,8,-38,0,-48],"#9fb0c6");
      poly([-8,-36,-36,-48,-28,-26,-8,-30],"#c0cddd");poly([8,-36,36,-48,28,-26,8,-30],"#c0cddd");
      circ(0,-14,8,fl||"#43b8ff");circ(0,-14,4,"#bfefff");
      px(-2,-36,4,18,"#43b8ff");px(-2,0,4,34,"#43b8ff");
      ctx.restore();ctx.globalAlpha=1;}
  }else if(b.idx===8){ // 黑石要塞：厚重箭头臂+五棱金字塔核心（俯视五芒星堡，缓慢旋转）；纹路充能=主炮前摇
    const op=mp!==null?mp:(ph2>=1?1:0);
    const chg=Math.max(b.warpChg||0,ph2>=1?0.55:0);   // P2纹路常亮半格，主炮充能满亮
    ctx.save();ctx.rotate(t*0.0032);   // 整体缓慢旋转
    for(let k=0;k<5;k++){ctx.save();ctx.rotate(k*TAU/5);   // —— 五支厚重箭头臂 ——
      px(-2,-30,4,22,"#173d2a");   // 壳下亚空间光芯（常存，裂开才见）
      for(const sd of[-1,1]){ctx.save();ctx.translate(sd*op*2,0);   // 二阶段臂板沿中线微开
        poly([0,-50,sd*16,-32,sd*9,-26,sd*6,-6,0,-6],"#10151f");   // 下层臂板：宽肩后掠箭头剪影
        poly([0,-47,sd*12.5,-31,sd*7,-25,sd*4.5,-8,0,-8],"#1b2434");   // 上层臂板（厚度层次）
        poly([0,-47,sd*12.5,-31,sd*7,-25,0,-30],sd<0?"#33436a":"#232f47");   // 箭头斜面受光（左亮右暗）
        px(sd*2-1,-22,2,12,"#0a0e16");   // 板缝
        ctx.restore();}
      px(-1,-26,2,18,"#123324");   // 中央能量纹路（暗纹常存）
      if(chg>0){const vl=18*chg;px(-1,-8-vl,2,vl,"#5cff9d");}   // 亮纹从臂根向箭头蔓延（充能前摇）
      px(-1.5,-50,3,3,fl||"#5cff9d");   // 箭头尖绿晶
      ctx.restore();}
    for(let k=0;k<5;k++){ctx.save();ctx.rotate((k+0.5)*TAU/5);   // 臂间小堡
      poly([0,-15,6.5,-5,-6.5,-5],"#141b29");px(-1,-11,2,2,"#1f6a44");
      ctx.restore();}
    poly([0,-20,12,-16,19,-6,19,6,12,16,0,20,-12,16,-19,6,-19,-6,-12,-16],"#10151f");   // 外环堡垒·下层
    poly([0,-17,10,-13,16,-5,16,5,10,13,0,17,-10,13,-16,5,-16,-5,-10,-13],"#1b2434");   // 外环堡垒·上层
    for(let i=0;i<10;i++){const a2=i*TAU/10;px(Math.sin(a2)*17.5-1,-Math.cos(a2)*17.5-1,2,2,t%40<20?"#3d4f73":"#24304a");}   // 环上窗火
    for(let k=0;k<5;k++){const a1=k*TAU/5-TAU/20,a2=k*TAU/5+TAU/20;   // 五棱金字塔（俯视棱面交替受光）
      ctx.fillStyle=k%2?"#33436a":"#1b2434";
      ctx.beginPath();ctx.moveTo(0,0);ctx.lineTo(Math.sin(a1)*13,-Math.cos(a1)*13);ctx.lineTo(Math.sin(a2)*13,-Math.cos(a2)*13);ctx.closePath();ctx.fill();}
    if(op>0){ctx.strokeStyle=`rgba(92,255,157,${op*0.7})`;ctx.lineWidth=1;   // 二阶段棱缝透绿
      for(let k=0;k<5;k++){const a=k*TAU/5+TAU/20;ctx.beginPath();ctx.moveTo(0,0);ctx.lineTo(Math.sin(a)*13,-Math.cos(a)*13);ctx.stroke();}}
    if(chg>0)circ(0,0,5+chg*3.5,`rgba(92,255,157,${chg*0.3})`);   // 充能光晕
    circ(0,0,4.5,"#0a2418");circ(0,0,3,fl||"#5cff9d");circ(0,0,1.3,"#d6ffe8");   // 亚空间核心
    ctx.restore();
  }else if(b.idx===9){ // 泰伦母舰：锥形生物舰（头下尾上）；P2头背甲壳裂开露眼+伸出触手；P3触手间展开环齿嘴
    let op2,op3;   // 变形期 mp=0→1 连续驱动（phase在变形开始即+1，故mp优先于ph2）
    if(ph2===0){op2=0;op3=0;}   // P1：甲壳闭合
    else if(ph2===1){op2=mp!==null?mp:1;op3=0;}   // P1→P2变形：甲壳滑开+触手伸出+眼渐显
    else{op2=1;op3=mp!==null?mp:1;}   // P2→P3变形：甲壳翻开+嘴展开+触手加粗
    ctx.save();ctx.scale(1,1+Math.sin(t*0.05)*0.015);   // 呼吸起伏
    for(const sd of[-1,0,1]){const sw=Math.sin(t*0.055+sd*1.8)*3;   // 尾须缓摆
      poly([sd*8-2.5,-36,sd*8+2.5,-36,sd*11+sw,-52,sd*9+sw-1.5,-52],"#3d2f4a");
      px(sd*11+sw-1,-54,2,3,"#e8dcc0");}
    poly([0,-44,18,-36,24,-18,20,2,12,18,6,32,0,38,-6,32,-12,18,-20,2,-24,-18,-18,-36],"#241a30");   // 锥形舰体·底
    poly([0,-42,15,-34,20,-18,17,0,10,16,5,30,0,35,-5,30,-10,16,-17,0,-20,-18,-15,-34],"#3d2f4a");   // 中层甲壳
    poly([0,-40,6,-30,7,-12,5,4,3,16,0,22,-3,16,-5,4,-7,-12,-6,-30],"#1a1426");   // 背脊中线甲
    for(let i=0;i<3;i++){const yy=-38+i*7,ww=15-i*3;   // 橄榄甲片叠瓦
      poly([0,yy-4,ww,yy+1,ww-3,yy+5,-(ww-3),yy+5,-ww,yy+1],i%2?"#5a6a32":"#4a5628");}
    for(const sd of[-1,1])for(let i=0;i<3;i++){const yy=-30+i*12,xx=sd*(20-i*3);   // 侧棘（骨白）
      poly([xx,yy,xx+sd*7,yy+3,xx,yy+6],"#e8dcc0");}
    for(const sd of[-1,1]){poly([sd*4,8,sd*13,4,sd*11,18,sd*6,26],"#b87a6a");   // 两侧粉肉
      for(let i=0;i<3;i++)px(sd*(7+i*2)-1,9+i*5,2,4,"#8a5a4a");}   // 肋纹
    ctx.globalAlpha=0.35+0.3*Math.sin(t*0.09);px(-1,-34,2,44,"#7dff8a");ctx.globalAlpha=1;   // 脉络搏动
    if(op2>0){ctx.globalAlpha=op2;   // 壳下组织：粉肉+大眼（瞳孔追玩家，P3变橙红）
      circ(0,20,8,"#b87a6a");
      const ex=clamp((G.p.x-b.x)*0.02,-1.5,1.5),ey=clamp((G.p.y-b.y)*0.015,-1,2);
      circ(0,20,5.5,ph2>=2?"#e85c3a":"#b8e85c");
      ctx.fillStyle="#0d0d14";ctx.fillRect(ex-1,17+ey,2.5,6);
      circ(ex-1.5,18.5+ey,0.8,"#e8ffd0");
      ctx.globalAlpha=1;}
    for(const sd of[-1,1]){ctx.save();ctx.translate(sd*(op2*6+op3*5),-op3*3);   // 头背甲壳两瓣：P2滑开/P3翻开
      poly([0,20,sd*9,14,sd*8,28,sd*3,36,0,34],"#241a30");
      poly([0,22,sd*6,17,sd*5,27,sd*2,32,0,31],"#3d2f4a");
      ctx.restore();}
    if(op2>0){   // 触手：2长（角度制扇形摆荡，与判定同源）+4小
      for(const sd of[-1,1]){
        const pts=tentSegs(b,sd,op2),gl=pts[3].glow||0,sweeping=b.tent&&b.tent.side===sd;
        if(sweeping&&b.tent.act>17){b.tent.trail=b.tent.trail||[];b.tent.trail.push(pts.map(p=>({x:p.x,y:p.y})));if(b.tent.trail.length>10)b.tent.trail.shift();}   // 扫击记录残影
        else if(sweeping&&b.tent.trail&&b.tent.trail.length)b.tent.trail.shift();
        if(sweeping&&b.tent.trail){const tr=b.tent.trail;
          for(let hi=0;hi<tr.length;hi++){const a=(hi+1)/tr.length*0.2;ctx.globalAlpha=a;
            for(let i=1;i<7;i++){const f=i/6;circ(tr[hi][i].x,tr[hi][i].y,3.2*(1-f*0.45)*0.85,"#a8ff5c");}ctx.globalAlpha=1;}}
        for(let i=6;i>=0;i--){const p=pts[i],f=i/6,r=Math.max(0.5,3.2*(1-f*0.45)*(1+op3*0.3));
          if(gl>0.15){ctx.globalAlpha=gl*0.28;circ(p.x,p.y,r+2,"#a8ff5c");ctx.globalAlpha=1;}
          circ(p.x,p.y,r,i%2?"#7a4a6a":"#5a3a5a");}
        const p1=pts[5],p2=pts[6],ta=Math.atan2(p2.y-p1.y,p2.x-p1.x);   // 骨白刀尖：朝向跟随末端切线
        ctx.save();ctx.translate(p2.x,p2.y);ctx.rotate(ta-Math.PI/2);
        poly([-2.5,-1.5,2.5,-1.5,0,6],"#e8dcc0");
        ctx.restore();
      }
      if(b.tent&&b.tent.warn>0&&G.time%3===0){const pts2=tentSegs(b,b.tent.side,op2);   // 前摇聚能粒子
        G.parts.push({x:b.x+pts2[4].x+rnd(-24,24),y:b.y+pts2[4].y+rnd(-14,24),vx:0,vy:0,life:18,col:"#a8ff5c",sz:1,suck:{x:b.x+pts2[4].x,y:b.y+pts2[4].y}});}
      for(const sd of[-1,1]){const tentS=(x0,y0,len,wd,phs)=>{const sw2=Math.sin(t*0.06+phs)*3;   // 4条小触手
        for(let i2=0;i2<3;i2++){const f=i2/3;circ(x0+sw2*f*f*2,y0+len*f,wd*(1-f*0.4)*(1+op3*0.3),i2%2?"#5a3a5a":"#7a4a6a");}};
        tentS(sd*15*op2,16,12*op2,1.8,sd*2.9+1);tentS(sd*4*op2,32,14*op2,1.6,sd*4.1+2);}
    }
    if(op3>0){const mw=9*op3;   // 环齿嘴（P3展开，利齿缓慢旋动）
      circ(0,30,mw,"#4a1a1a");circ(0,30,mw*0.55,"#2a0d0d");
      for(let i=0;i<8;i++){const a=i*TAU/8+t*0.02,tx3=Math.cos(a)*mw*0.82,ty3=Math.sin(a)*mw*0.82;
        poly([tx3-1.5,30+ty3,tx3+1.5,30+ty3,tx3*0.6,30+ty3*0.6],"#e8dcc0");}}
    ctx.restore();
  }else{ // 暗黑魔碟：核心+圆环；变形=圆环前后裂开、两半各自收缩成犄角（同一几何体连续演化）；爆甲=壳板飞离、铆钉伸长成刺
    let open,fo,eyeG;
    if(b.phase===0){open=0;fo=0;eyeG=0;}
    else if(b.phase===1){open=mp!==null?mp:1;fo=0;eyeG=mp!==null?mp:1;}
    else{open=1;fo=mp!==null?mp:1;eyeG=1;}
    const R=30+open*3;   // 外径微扩
    circ(0,0,20,"#1a1030");circ(0,0,15,"#12081c");
    px(-11,-5,7,6,"#241430");px(4,-5,7,6,"#241430");   // 眼窝常存
    if(eyeG>0){ctx.globalAlpha=eyeG;   // 赤瞳点亮（非凭空出现）
      px(-10,-4,5,4,fl||"#ff3355");px(5,-4,5,4,fl||"#ff3355");
      px(-9,-3,2,1,"#ffdfe5");px(6,-3,2,1,"#ffdfe5");
      ctx.globalAlpha=1;}
    const rot=open*0.55;   // 外壳下边分开，以顶部为轴外旋，下端打开
    for(const sd of[-1,1]){ctx.save();
      ctx.translate(0,-R);ctx.rotate(-sd*rot);ctx.translate(0,R);   // 绕顶端轴旋转：下端向外打开
      const a0=sd<0?Math.PI/2:-Math.PI/2,a1=sd<0?Math.PI*1.5:Math.PI/2;   // 左半环/右半环
      ctx.strokeStyle="#55336e";ctx.lineWidth=13;
      ctx.beginPath();ctx.arc(0,0,R,a0,a1);ctx.stroke();
      ctx.strokeStyle="#6e4490";ctx.lineWidth=5;
      ctx.beginPath();ctx.arc(0,0,R,a0,a1);ctx.stroke();
      const hL=3+open*26;   // 半环下端伸长变尖：圆环下半部分延续为朝下的锥刺（同一几何体）
      poly([-6.5,R,6.5,R,2.5,R+hL*0.55,0,R+hL,-2.5,R+hL*0.55],"#55336e");
      poly([-3.5,R,3.5,R,1.2,R+hL*0.5,0,R+hL*0.8,-1.2,R+hL*0.5],"#6e4490");
      for(let k=0;k<3;k++){const aa=a0+(0.35+k*0.2)*(a1-a0);
        const rx=Math.cos(aa),ry=Math.sin(aa),tx2=-ry,ty2=rx;
        const bl=2+9*fo;   // 铆钉→尖刺连续伸长
        poly([rx*(R+5)+tx2*2.5,ry*(R+5)+ty2*2.5, rx*(R+5)-tx2*2.5,ry*(R+5)-ty2*2.5, rx*(R+5+bl),ry*(R+5+bl)],fo>0.6?"#c86bff":"#2a1a3a");
        if(fo<0.99){ctx.save();   // 外壳板：爆甲时旋转飞离（有运动轨迹，非消失）
          ctx.translate(rx*(R+9+fo*22)+tx2*fo*sd*9,ry*(R+9+fo*22)+ty2*fo*sd*9);
          ctx.rotate(aa+Math.PI/2+fo*sd*1.7);ctx.globalAlpha=1-fo;
          px(-5,-3,10,6,"#55336e");px(-5,-3,10,2,"#6e4490");
          ctx.restore();ctx.globalAlpha=1;}}
      {const ta=a0+0.5*(a1-a0),bl2=2+6*fo;   // 红色炮台：基座常存，爆甲后炮管伸出点亮
        ctx.save();ctx.translate(Math.cos(ta)*(R+2),Math.sin(ta)*(R+2));ctx.rotate(ta+Math.PI/2);
        px(-2.5,-3,5,4,"#2a1a3a");
        px(-1.5,-3-bl2,3,bl2,fo>0.4?(fl||"#ff3355"):"#3a2248");
        ctx.restore();}
      for(let k=0;k<2;k++){const aa2=a0+(0.35+k*0.3)*(a1-a0)+Math.sin(t*0.012+k*2)*0.05;   // 环面光点
        px(Math.cos(aa2)*R-2,Math.sin(aa2)*R-2,4,4,"#c86bff");}
      ctx.restore();}
    circ(0,-R,4,"#6e4490");   // 顶部铰链节
  }
  if(flashA>0){ctx.globalAlpha=flashA;ctx.strokeStyle="#fff";
    ctx.beginPath();ctx.arc(0,0,b.r+6,0,TAU);ctx.stroke();ctx.globalAlpha=1;}
  if(b.flash>0)b.flash--;
  ctx.restore();
  // 冲撞预警线（暗黑突击）
  if(b.dashSt&&b.dashSt.ph==="tele"&&G.time%4<2){
    ctx.strokeStyle="#ff3355";ctx.globalAlpha=0.6;
    if(ctx.setLineDash)ctx.setLineDash([4,3]);
    ctx.beginPath();ctx.moveTo(b.x,b.y);ctx.lineTo(G.p.x,G.p.y);ctx.stroke();
    if(ctx.setLineDash)ctx.setLineDash([]);ctx.globalAlpha=1;}
  // 多管血条：一管蓝/二管红/三管橙，当前管铺在下一管之上，见底锁血转场
  const w=160,def2=BOSSES[b.idx],thr=def2.phases===2?[0.5]:[0.66,0.33];
  const TUBEC=["#43b8ff","#e0393e","#ff9a3d"];
  const ratio=clamp(b.hp/b.maxhp,0,1),bx=(W-w)/2;
  px(bx-2,8,w+4,8,"#0d1226");
  px(bx,10,w,4,b.phase<thr.length?(TUBEC[b.phase+1]||"#3a1020"):"#3a1020"); // 底：下一管或暗底
  const hi=b.phase===0?1:thr[b.phase-1],lo=b.phase<thr.length?thr[b.phase]:0;
  const pc=clamp((ratio-lo)/(hi-lo),0,1);
  px(bx,10,w*pc,4,TUBEC[b.phase]||b.col);                                     // 当前管
  for(const tt of thr)px(bx+Math.round(w*tt)-1,9,2,6,"#0d1226");              // 管界刻痕
  if(b.transT>0&&G.time%8<4){ctx.strokeStyle="#fff";ctx.lineWidth=1;ctx.strokeRect(bx-2.5,7.5,w+5,9);}
  ctx.font="6px 'Press Start 2P',monospace";ctx.fillStyle="#fff";ctx.textAlign="center";
  ctx.fillText(b.transT>0?b.name:(b.name+" "+Math.ceil(pc*100)+"%"),W/2,22);
}
/* ---- Boss 分体绘制助手 ---- */
function drawProgenitor(b,t,fl,tf){ // 太空原种·装甲虫兽（tf 0=装甲态→1=血肉态）：P1小翅芽→P2骨膜巨翼；无复眼（大颚+感器红缝=虫形压迫感）；摆尾衔接于躯体之下（尾根被加长的身体覆住，无缝）
  ctx.rotate(Math.sin(t*0.05)*0.04);   // 悬停微摇
  const wS=0.22+0.78*tf;   // 翼展：P1小翅芽→P2全展（同一对翼连续缩放）
  // —— 骨膜翼一对：3根骨刺撑起膜面（P1灰甲小翼→P2血红膜+暗红骨，同一几何体罩色） ——
  for(const sd of[-1,1]){ctx.save();
    ctx.translate(sd*7,-8);ctx.scale(sd*wS,1+Math.sin(t*0.07)*0.03);   // 呼吸+镜像
    poly([0,-4,14,-16,34,-16,54,-10,48,0,34,6,16,4,0,2],"#c9d6e2");   // 膜面主甲
    poly([0,-4,14,-16,34,-16,54,-10,40,-8,18,-8,0,-1],"#e8f0f6");     // 上缘受光
    poly([0,2,16,4,34,6,48,0,36,0,14,2],"#8498ac");                   // 下缘暗面
    for(const tp of[[14,-15],[34,-15],[54,-9]])drawSeg(2,-2,tp[0],tp[1],2,"#8498ac",1);   // 3根骨刺（辐射）
    if(tf>0){ctx.globalAlpha=tf*0.85;
      poly([0,-4,14,-16,34,-16,54,-10,48,0,34,6,16,4,0,2],"#c02030");   // P2膜面转血红（同面罩色）
      for(const tp of[[14,-15],[34,-15],[54,-9]])drawSeg(2,-2,tp[0],tp[1],2,"#7a1622",tf);   // P2骨刺转暗红
      ctx.globalAlpha=1;}
    ctx.restore();}
  // —— 摆尾：先画在躯体下层（尾根被加长的身体覆住，无缝衔接），5节逐节相位摆动；P2节间血红肉显露+整体伸长 ——
  const segH=5.2+tf*1.6,gap=11;
  for(let i=4;i>=0;i--){const sw=Math.sin(t*0.055+i*0.7)*(1.2+i),sy=gap+i*segH,hw=9-i*1.5;
    if(tf>0&&i<4){ctx.globalAlpha=tf*0.85;px(sw-hw+2,sy+segH-2,(hw-2)*2,2,"#c8202e");ctx.globalAlpha=1;}   // 节间血肉环
    poly([sw-hw,sy,sw+hw,sy,sw+hw-2,sy+segH,sw-hw+2,sy+segH],i%2?"#b8c8d8":"#c9d6e2");   // 尾节甲片
    px(sw-hw,sy,3,segH,"#e8f0f6");px(sw+hw-3,sy,3,segH,"#8498ac");   // 左亮右暗
    for(const sd of[-1,1])poly([sw+sd*(hw+1),sy+1,sw+sd*(hw+4),sy+2.5,sw+sd*(hw+1),sy+4],"#e8dcc0");   // 节侧骨刺
  }
  const swT=Math.sin(t*0.055+2.8)*5.2,tipY=gap+4*segH;   // 尾末生殖腔（花弹发射口，与enemies.js同源公式）
  circ(swT,tipY+2,2.6+Math.sin(t*0.11)*0.6,fl||(tf>0.5?"#ff2a3c":"#ff5566"));
  circ(swT,tipY+2,1.1,"#ffdfe5");
  // —— 壳下血肉（常存于背甲之下，滑开才见；血红，非粉） ——
  if(tf>0){ctx.globalAlpha=tf*0.9;
    poly([0,-36,9,-29,11,-14,8,2,5,16,0,20,-5,16,-8,2,-11,-14,-9,-29],"#c8202e");
    px(-2,-30,4,46,"#e8393a");ctx.globalAlpha=1;}
  // —— 背甲两瓣：沿背脊中线裂开，P2向外滑开（同一多边形平移） ——
  for(const sd of[-1,1]){ctx.save();ctx.translate(sd*tf*7,0);
    poly([0,-40,sd*11,-37,sd*15,-28,sd*13,-12,sd*10,4,sd*6,14,0,18],sd<0?"#c9d6e2":"#9fb0c2");
    poly([0,-40,sd*11,-37,sd*15,-28,sd*7,-26,sd*5,-36],"#e8f0f6");   // 受光斜面
    for(let i=0;i<4;i++)px(sd*(4+i*2.8)-1,-24+i*9,2,5,"#5a6c80");     // 甲片板缝
    const crk=Math.max(0,Math.min(1,(tf-0.15)/0.4))*10;                 // 裂纹随tf生长（延长，非新增）
    if(crk>0.5)px(sd*6-1,-18,2,crk,"#8a2a3a");
    ctx.restore();}
  // —— 头部：圆顶甲+锯齿犄角+下弯大颚（无复眼=虫形压迫感）+一线感器红缝 ——
  circ(0,-34,10,"#dde7f0");px(-9,-36,18,3,"#9fb0c2");
  for(const sd of[-1,1]){poly([sd*6,-40,sd*15,-49,sd*12,-51,sd*4,-43],"#8498ac");
    poly([sd*10,-44,sd*13,-48,sd*11,-43],"#5a6c80");                     // 犄角锯齿棱
    px(sd*9-1,-46,2,4,"#7dff8a");}                                       // 犄角绿纹
  px(-5,-33,10,1.6,t%30<15?"#ff3355":"#7a1622");   // 感器红缝（明灭）
  for(const sd of[-1,1]){poly([sd*3,-26,sd*9,-22,sd*8,-14,sd*5,-13,sd*2,-20],"#e8dcc0");   // 下弯大颚（骨白）
    px(sd*5,-16,2,3,"#8a6a4a");}                                         // 颚尖暗色
  if(b.eyeGlow>0){ctx.globalAlpha=b.eyeGlow/20;   // 击发余辉：大颚+感器缝闪白
    px(-8,-22,4,3,"#fff");px(4,-22,4,3,"#fff");px(-5,-33,10,1.6,"#fff");ctx.globalAlpha=1;}
  // —— 头侧青色管囊（P2转荧绿） ——
  for(const sd of[-1,1]){px(sd*15-2.5,-18,5,12,tf>0.5?"#7dff8a":(t%40<20?"#7fd8ff":"#43b8ff"));
    px(sd*15-1.5,-20,3,3,"#55648a");}
}
function drawAssault(t,fl,swp,ph,mp){ // 暗黑突击（swp=翼展角；炮管/推进器随阶段增多）
  const sw=swp*Math.PI/180;
  for(const sd of[-1,1]){
    const tx=sd*(8+52*Math.sin(sw)),ty=14-52*Math.cos(sw);
    poly([sd*4,6,tx,ty,tx-sd*9,ty+11,sd*4,20],ph>=2?"#c01a2e":"#a01224");
    poly([tx-sd*2,ty-6,tx+sd*3,ty-14,tx+sd*7,ty-3],"#6e0c1a");}
  poly([0,38,-5,6,-3,-26,3,-26,5,6],"#d4233a");
  px(-2,8,4,8,fl||"#ffd23d");
  const guns=[[16,4],[-16,4],[30,-4],[-30,-4],[42,-10],[-42,-10]];
  const gn=ph>=2?6:ph>=1?4:2,pgn=ph===2?4:ph===1?2:0;
  for(let i=0;i<gn;i++){let gl=8;if(mp!==null&&i>=pgn)gl=Math.max(1,8*mp);   // 新炮管生长
    px(guns[i][0]-1.5,guns[i][1],3,gl,"#3a0a10");px(guns[i][0]-1,guns[i][1]+gl-2,2,2,"#ff9a3d");}
  const eng=[[7,-26],[-7,-26],[0,-30],[14,-22]];
  const en=ph>=2?4:ph>=1?3:2,pen=ph===2?3:ph===1?2:0;
  for(let i=0;i<en;i++){let el=5+(t%4<2?2:0);if(mp!==null&&i>=pen)el=Math.max(1,el*mp);   // 新推进器
    px(eng[i][0]-2,eng[i][1],4,3,"#5a0a14");
    px(eng[i][0]-1.5,eng[i][1]-3-el,3,el,t%6<3?"#ff9a3d":"#ffcf5c");}
  if(ph>=1){poly([-52,-14,-24,-3,-22,-1,-50,-11],"#ffdfe5");poly([52,-14,24,-3,22,-1,50,-11],"#ffdfe5");}
  if(ph>=2){px(-4,-16,8,12,fl||"#ff3355");px(-2,-14,4,8,"#ffdfe5");}
}
function drawPiano(b,t,fl,split){ // 激光钢琴（split=裂壳进度0~1）
  const ks=b.keys,n=ks?ks.n:21;
  px(-(n-1)*5-5,6,(n-1)*10+10,19,"#141821");   // 键槽（键距10统一，不再因非整数取整成对）
  for(let i=0;i<n;i++){const kx=-(n-1)*5+i*10;
    const hot=ks&&(ks.hot===i||(ks.hotList&&ks.hotList.indexOf(i)>=0));
    px(kx-4,8,8,14,hot?(t%6<3?"#e8fbff":"#43e8ff"):"#d8e4f0");
    px(kx-4,20,8,2,hot?"#43e8ff":"#8a9ab8");}
  if(ks&&ks.hotT>0&&ks.hotT0){const pr=1-ks.hotT/ks.hotT0;   // 蓄力前摇：即将发射的键下方圆形蓄力
    const list=ks.hotList||(ks.hot>=0?[ks.hot]:[]);
    for(const kh of list){const kx=-(n-1)*5+kh*10;
      ctx.globalAlpha=0.3+0.55*pr;ctx.strokeStyle="#43e8ff";ctx.lineWidth=1.5;
      ctx.beginPath();ctx.arc(kx,28,2+3.5*pr,0,TAU);ctx.stroke();
      ctx.globalAlpha=0.22*pr;ctx.fillStyle="#43e8ff";
      ctx.beginPath();ctx.arc(kx,28,2+3.5*pr,0,TAU);ctx.fill();
      ctx.globalAlpha=1;}}
  const off=split*30;   // 两半穹顶向左右裂开
  for(const sd of[-1,1]){ctx.save();ctx.translate(sd*off,0);
    const q0=sd<0?Math.PI:Math.PI*1.5,q1=sd<0?Math.PI*1.5:Math.PI*2;
    ctx.fillStyle="#3a4460";ctx.beginPath();ctx.ellipse(0,6,118,34,0,q0,q1);ctx.lineTo(0,6);ctx.closePath();ctx.fill();
    ctx.fillStyle="#55648a";ctx.beginPath();ctx.ellipse(0,6,92,26,0,q0,q1);ctx.lineTo(0,6);ctx.closePath();ctx.fill();
    ctx.fillStyle="#6e7f9e";ctx.beginPath();ctx.ellipse(0,6,60,17,0,q0,q1);ctx.lineTo(0,6);ctx.closePath();ctx.fill();
    ctx.restore();}
  if(split>0){ctx.globalAlpha=split;   // 红色核心
    const cr=10+Math.sin(t*0.12)*2;
    circ(0,-4,cr+4,"#7a0e1e");circ(0,-4,cr,fl||"#ff3355");circ(0,-4,cr*0.45,"#ffdfe5");
    ctx.globalAlpha=1;}
  if(split<1){ctx.globalAlpha=1-split;   // 一阶段青色核心窗
    px(-7,-14,14,9,fl||"#43e8ff");px(-4,-12,8,5,"#bfefff");
    ctx.globalAlpha=1;}
  for(const sd of[-1,1]){ctx.save();ctx.translate(sd*off,0);   // 舰桥从中线剖开，各随各的半壳
    px(sd<0?-10:0,-32,10,10,"#3a4460");
    px(sd<0?-6:0,-37,6,5,"#55648a");
    for(let i=0;i<7;i++){const a=Math.PI+(i+0.5)/7*Math.PI;   // 壳沿铆钉也随半壳
      if((sd<0)!==(a<Math.PI*1.5))continue;
      px(Math.cos(a)*110-1.5,6+Math.sin(a)*30-1.5,3,3,"#9fb4d8");}
    ctx.restore();}
}
/* ---- Boss光束与浮游炮渲染 ---- */
function drawFunnel(f){   // 蓝白长钉无人机（单架）
  poly([f.x,f.y-5,f.x+4,f.y+3,f.x-4,f.y+3],"#cfe4ff");
  px(f.x-1,f.y-1,2,3,"#43b8ff");
  if(f.flashT>0){ctx.globalAlpha=0.6;px(f.x-3,f.y+3,6,3,"#ffffff");ctx.globalAlpha=1;}
}
function drawFunnelsBack(){   // 转到Boss上半部（背后）的无人机先画，被机体遮挡
  for(const f of G.funnels)if(Math.sin(f.sa)<-0.15)drawFunnel(f);
}
function drawBossFx(){
  for(const f of G.funnels)if(Math.sin(f.sa)>=-0.15)drawFunnel(f);   // 下半部（身前）后画
  for(const bm of G.bbeams){
    if(bm.tele>0){if(G.time%4<2){ctx.globalAlpha=0.5;ctx.strokeStyle=bm.col;ctx.lineWidth=1;
      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;
      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.moveTo(bm.x1,bm.y1);ctx.lineTo(bm.x2,bm.y2);ctx.stroke();
      ctx.globalAlpha=1;ctx.globalCompositeOperation="source-over";}
  }
}
/* ================= 世界渲染 ================= */
function drawSprite(spr,x,y){ctx.drawImage(spr,Math.round(x-spr.width/2),Math.round(y-spr.height/2));}
function drawSeg(x1,y1,x2,y2,w,col,alpha){
  const d=Math.hypot(x2-x1,y2-y1)||1,steps=Math.max(1,Math.ceil(d/2));
  ctx.globalAlpha=alpha;ctx.fillStyle=col;
  for(let i=0;i<=steps;i++){const t2=i/steps;
    ctx.fillRect(Math.round(lerp(x1,x2,t2)-w/2),Math.round(lerp(y1,y2,t2)-w/2),w,w);}
  ctx.globalAlpha=1;
}
function render(){
  ctx.save();
  if(G&&G.shake>0){ctx.translate(rnd(-G.shake,G.shake)*0.5,rnd(-G.shake,G.shake)*0.5);}
  drawBG(1);
  if(G){
    // 拾取物
    for(const k of G.picks){const bob=Math.sin(k.t*0.1)*1.5;drawSprite(SPR[k.spr],k.x,k.y+bob);}
    // 敌机
    for(const e of G.enemies){
      if(e.dead)continue;
      ctx.save();
      if(e.beh==="spin"){ctx.translate(e.x,e.y);ctx.rotate(e.rot);ctx.drawImage(e.spr,-e.dw/2,-e.dh/2,e.dw,e.dh);}
      else ctx.drawImage(e.spr,e.x-e.dw/2,e.y-e.dh/2,e.dw,e.dh); // 亚像素绘制，移动丝滑
      ctx.restore();
      // 冻结标记：四角冰晶+雪花粒子（不再用矩形染色）
      if(e.slow>0){const cx2=Math.round(e.x-e.dw/2),cy2=Math.round(e.y-e.dh/2);
        px(cx2,cy2,2,2,"#7fd8ff");px(cx2+e.dw-2,cy2,2,2,"#7fd8ff");
        px(cx2,cy2+e.dh-2,2,2,"#7fd8ff");px(cx2+e.dw-2,cy2+e.dh-2,2,2,"#7fd8ff");
        if(G.time%8===0)spawnPart(e.x+rnd(-4,4),e.y-e.dh/2,"#bfeaff",1);}
      // 中毒标记：绿色气泡
      if(e.dot&&G.time%10===0)spawnPart(e.x+rnd(-3,3),e.y,"#9dff5c",1);
      // 彻底冻结：冰壳轮廓+冰凌（描边而非实心，避免误认血条）
      if(e.frozen>0){ctx.strokeStyle="#bfeaff";ctx.globalAlpha=0.9;
        ctx.strokeRect(Math.round(e.x-e.dw/2)-1.5,Math.round(e.y-e.dh/2)-1.5,e.dw+3,e.dh+3);ctx.globalAlpha=1;
        px(e.x-e.dw/2-2,e.y-1,2,2,"#fff");px(e.x+e.dw/2,e.y-3,2,2,"#fff");px(e.x-1,e.y-e.dh/2-3,2,2,"#fff");}
      // 寄生电浆标记：紫色水蛙脉动
      if(e.leech&&G.time%8<4)px(e.x-2,e.y-2,4,4,"#b05ce8");
      if(e.flash>0){ctx.globalAlpha=0.7;ctx.globalCompositeOperation="lighter";ctx.drawImage(e.spr,Math.round(e.x-e.dw/2),Math.round(e.y-e.dh/2),e.dw,e.dh);ctx.globalAlpha=1;ctx.globalCompositeOperation="source-over";}
      // 精英标记：头顶金色小皇冠
      if(e.elite){const bob=Math.sin(G.time*0.1)*1.5;
        px(e.x-4,e.y-e.dh/2-5+bob,2,3,"#ffd23d");px(e.x-1,e.y-e.dh/2-7+bob,2,5,"#ffd23d");px(e.x+2,e.y-e.dh/2-5+bob,2,3,"#ffd23d");}
      // 受击迷你血条（真实扣减可见；图鉴演示中常驻显示）
      if((e.hpt>0&&e.hp<e.maxhp)||G.demoSim){const w2=e.dw,fr=clamp(e.hp/e.maxhp,0,1);
        px(e.x-w2/2,e.y-e.dh/2-3,w2,2,"#3a1020");
        px(e.x-w2/2,e.y-e.dh/2-3,w2*fr,2,fr>0.4?"#5cff9d":"#ff5566");}
    }
    drawFunnelsBack();drawBoss();drawBossFx();
    // 敌弹（圆形光晕烘焙在精灵内）
    for(const b of G.eb){
      if(b.scale&&b.scale!==1){const sp=SPR[b.spr];   // 成长弹（花弹）
        ctx.save();ctx.translate(Math.round(b.x),Math.round(b.y));ctx.scale(b.scale,b.scale);
        if(b.rift>0)ctx.globalAlpha=0.5+0.4*Math.sin(G.time*0.35);   // 裂隙弹预警闪烁
        ctx.drawImage(sp,-Math.round(sp.width/2),-Math.round(sp.height/2));ctx.restore();}
      else if(b.spr==="dartS"||b.spr==="dartB"||b.spr==="dartP"||b.spr==="shardB"||b.spr==="spikeB"){const sp=SPR[b.spr];   // 长条弹：按飞行方向偏转
        ctx.save();ctx.translate(Math.round(b.x),Math.round(b.y));
        ctx.rotate(Math.atan2(b.vy,b.vx)-Math.PI/2);
        ctx.drawImage(sp,-Math.round(sp.width/2),-Math.round(sp.height/2));ctx.restore();}
      else drawSprite(SPR[b.spr],b.x,b.y);}
    // 玩家子弹
    for(const b of G.pb){
      if(b.spr){ctx.save();ctx.translate(b.x,b.y);
        if(b.spin)ctx.rotate(G.time*0.35);
        else if(b.homing||b.rot)ctx.rotate(Math.atan2(b.vy,b.vx)+Math.PI/2);
        else if(b.t==="b")ctx.rotate(G.time*0.3);
        const bsc=b.scale||1,bspr=SPR[b.spr];
        ctx.drawImage(bspr,-bspr.width*bsc/2,-bspr.height*bsc/2,bspr.width*bsc,bspr.height*bsc);ctx.restore();}
      else if(b.t==="f"){px(b.x-1.5,b.y-1.5,3,3,pick(["#ff9a3d","#ff5566","#ffd23d"]));}
      else if(b.t==="wv"){   // 波动炮：剑气弧光
        const rr=b.r;
        ctx.globalCompositeOperation="lighter";
        ctx.globalAlpha=0.75;ctx.strokeStyle="#43b8ff";ctx.lineWidth=4;
        ctx.beginPath();ctx.arc(b.x,b.y+rr*0.55,rr,Math.PI+0.55,TAU-0.55);ctx.stroke();
        ctx.globalAlpha=0.9;ctx.strokeStyle="#bfe8ff";ctx.lineWidth=2;
        ctx.beginPath();ctx.arc(b.x,b.y+rr*0.55,rr*0.78,Math.PI+0.5,TAU-0.5);ctx.stroke();
        ctx.globalAlpha=1;ctx.strokeStyle="#ffffff";ctx.lineWidth=1;
        ctx.beginPath();ctx.arc(b.x,b.y+rr*0.55,rr*0.58,Math.PI+0.45,TAU-0.45);ctx.stroke();
        ctx.globalCompositeOperation="source-over";}
      else if(b.t==="rg"){ctx.globalAlpha=0.3;px(b.x-3.5,b.y-11,7,22,"#b98cff");ctx.globalAlpha=1;
        px(b.x-2,b.y-8,4,14,"#b98cff");px(b.x-1,b.y-8,2,14,"#fff");}
      else{px(b.x-1,b.y-3,2,5,"#7fd8ff");px(b.x-1,b.y-3,1,3,"#fff");}
    }
    // 激光束 / 电弧（线段式）
    for(const l of G.lasers){
      drawSeg(l.x1,l.y1,l.x2,l.y2,l.w,l.col,0.4);
      drawSeg(l.x1,l.y1,l.x2,l.y2,Math.max(1,Math.round(l.w*0.4)),"#ffffff",0.9);
      l.life--;
    }
    G.lasers=G.lasers.filter(l=>l.life>0);
    for(const z of G.zaps){
      for(let i=0;i<z.pts.length-1;i++){
        drawSeg(z.pts[i][0],z.pts[i][1],z.pts[i+1][0],z.pts[i+1][1],1,z.col,0.9);
        drawSeg(z.pts[i][0],z.pts[i][1],z.pts[i+1][0],z.pts[i+1][1],1,"#ffffff",0.5);}
    }
    // 区域效果 / 新星环 / 水雷（按类型差异化）
    for(const z of G.zones){
      if(z.kind==="gas"){  // 酸雾：纯粒子雾团（无圆形区域），飘过留下渐散酸雾轨迹
        if(G.time%2===0)G.parts.push({x:z.x+rnd(-1,1)*z.r*0.6,y:z.y+rnd(-1,1)*z.r*0.5,vx:rnd(-0.15,0.15),vy:rnd(0.1,0.4),life:rndi(26,40),col:pick(["#7dff8a","#a8ff5c","#4a8a3a"]),sz:rndi(2,4)});
        if(G.time%5===0)G.parts.push({x:z.x+rnd(-1,1)*z.r*0.85,y:z.y+rnd(-1,1)*z.r*0.7,vx:rnd(-0.3,0.3),vy:rnd(-0.1,0.3),life:rndi(14,22),col:"#e8ffd0",sz:1});
        continue;
      }
      if(z.kind==="plasma"){  // 电浆区：去除圆形区域，只保留内部窜动的电弧
        if(G.time%4===0)zapVisual(z.x+rnd(-z.r*0.7,z.r*0.7),z.y+rnd(-z.r*0.7,z.r*0.7),z.x+rnd(-z.r*0.7,z.r*0.7),z.y+rnd(-z.r*0.7,z.r*0.7),pick(["#43e8ff","#bfeaff"]));
        if(G.time%9===0)G.parts.push({x:z.x+rnd(-z.r/2,z.r/2),y:z.y+rnd(-z.r/2,z.r/2),vx:0,vy:-0.2,life:10,col:"#43e8ff",sz:1});
        continue;
      }
      ctx.globalAlpha=0.16;ctx.fillStyle=z.col;
      ctx.beginPath();ctx.arc(z.x,z.y,z.r,0,TAU);ctx.fill();
      ctx.globalAlpha=0.5+Math.sin(G.time*0.1)*0.2;ctx.strokeStyle=z.col;
      ctx.beginPath();ctx.arc(z.x,z.y,z.r,0,TAU);ctx.stroke();ctx.globalAlpha=1;
      if(z.slow){       // 时间力场：逆时针旋转刻度
        ctx.strokeStyle="#cfeaff";ctx.globalAlpha=0.6;
        for(let i=0;i<6;i++){const a=-G.time*0.02+i*TAU/6;
          ctx.beginPath();ctx.moveTo(z.x+Math.cos(a)*(z.r-6),z.y+Math.sin(a)*(z.r-6));
          ctx.lineTo(z.x+Math.cos(a)*z.r,z.y+Math.sin(a)*z.r);ctx.stroke();}
        ctx.globalAlpha=1;
      }else if(z.pull){       // 引力：内旋纹
        for(let i=0;i<3;i++){const a=G.time*0.08+i*TAU/3;
          px(z.x+Math.cos(a)*z.r*0.6-1,z.y+Math.sin(a)*z.r*0.6-1,2,2,"#b05ce8");}}
    }
    // 热诱弹
    for(const f of G.flares)drawSprite(SPR.flare,f.x,f.y);
    for(const n of G.novas){
      ctx.globalAlpha=clamp(n.life/22,0,1)*0.8;ctx.strokeStyle=n.col;
      ctx.beginPath();ctx.arc(n.x,n.y,Math.max(1,n.r),0,TAU);ctx.stroke();ctx.globalAlpha=1;
    }
    // 圣光十字：逐渐变长 + 原地旋转90°
    for(const hc of G.holies){
      const hrot=(hc.t/36)*Math.PI/2,hL=hc.len*Math.min(1,hc.t/12),hA=clamp(hc.life/18,0,1);
      for(let k=0;k<4;k++){const ang=hrot+k*Math.PI/2,hdx=Math.cos(ang),hdy=Math.sin(ang);
        drawSeg(hc.x,hc.y,hc.x+hdx*hL,hc.y+hdy*hL,4,"#ffcf5c",0.4*hA);
        drawSeg(hc.x,hc.y,hc.x+hdx*hL,hc.y+hdy*hL,2,"#fff4d9",0.9*hA);}
    }
    // 僚机 / 光刃 / 卫星 / 浮游单位
    if(G.p.dead<=0){
      for(const key of G.droneLoadout){const S=G.dst[key];
        if(S&&S.x!==undefined){const dspr=SPR[DRONES[key].spr],dsc=DRONES[key].big||1;
          if(dsc!==1)ctx.drawImage(dspr,Math.round(S.x-dspr.width*dsc/2),Math.round(S.y-dspr.height*dsc/2),Math.round(dspr.width*dsc),Math.round(dspr.height*dsc));
          else drawSprite(dspr,S.x,S.y);}}
      if(G.subLoadout.includes("orbit")){const lv=G.subs.orbit;
        for(let i=0;i<lv;i++){const a=G.p.orbA+i*(TAU/lv);drawSprite(SPR.blade,G.p.x+Math.cos(a)*26,G.p.y+Math.sin(a)*26);}}
      if(G.subLoadout.includes("sats")){const n=1+G.subs.sats;
        for(let i=0;i<n;i++){const a=G.p.satA+i*(TAU/n);drawSprite(SPR.sat,G.p.x+Math.cos(a)*20,G.p.y+Math.sin(a)*20);}}
      const skS=G.sst.seeker;if(skS&&skS.x!==undefined&&G.subLoadout.includes("seeker"))drawSprite(SPR.dGun2,skS.x,skS.y);
      const bdS=G.sst.beamdrone;if(bdS&&bdS.x!==undefined&&G.subLoadout.includes("beamdrone"))drawSprite(SPR.dBeam,bdS.x,bdS.y);

      if(G.subLoadout.includes("thorns"))for(let i=0;i<4;i++){const a=G.time*0.04+i*TAU/4;
        px(G.p.x+Math.cos(a)*13-1,G.p.y+Math.sin(a)*13-1,3,3,"#c8d8ff");}
    }
    // 玩家
    const p=G.p;
    if(p.dead<=0&&!(p.inv>0&&G.time%6<3)){
      drawSprite(SPR[SHIPS[G.ship].spr],p.x,p.y);
      // 尾焰
      const fl=G.time%8<4?3:5;
      px(p.x-1,p.y+7,2,fl,"#ff9a3d");px(p.x-0.5,p.y+7,1,fl-1,"#fff4d9");
      if(G.odActive>0){ctx.globalAlpha=0.4;px(p.x-8,p.y-4,1,12,"#41e6ff");px(p.x+7,p.y-4,1,12,"#41e6ff");ctx.globalAlpha=1;}
      if(G.shield>0){ctx.strokeStyle="#43e8ff";ctx.globalAlpha=0.5+Math.sin(G.time*0.1)*0.2;
        ctx.beginPath();ctx.arc(p.x,p.y,11,0,TAU);ctx.stroke();ctx.globalAlpha=1;}
      if(p.focus){px(p.x-1,p.y-1,3,3,"#ff3355");px(p.x-0.5,p.y-0.5,2,2,"#fff");
        ctx.strokeStyle="rgba(255,51,85,.5)";ctx.beginPath();ctx.arc(p.x,p.y,6,0,TAU);ctx.stroke();}
    }
    // 粒子与浮字（spark 粒子渲染为线段）
    for(const q of G.parts){ctx.globalAlpha=clamp(q.life/20,0,1);
      if(q.spark){ctx.strokeStyle=q.col;ctx.beginPath();ctx.moveTo(q.x,q.y);ctx.lineTo(q.x-q.vx*2.2,q.y-q.vy*2.2);ctx.stroke();}
      else px(q.x,q.y,q.sz,q.sz,q.col);
      ctx.globalAlpha=1;}
    ctx.textAlign="center";
    for(const t of G.texts){ctx.globalAlpha=clamp(t.life/30,0,1);ctx.font="6px 'Press Start 2P',monospace";ctx.fillStyle=t.col;ctx.fillText(t.t,t.x,t.y);ctx.globalAlpha=1;}
    if(!G.demoSim)drawHUD();
    // 横幅
    if(G.bannerT>0){
      const a=clamp(G.bannerT/30,0,1);
      ctx.globalAlpha=Math.min(1,a);
      ctx.font="bold 13px 'Microsoft YaHei',monospace";
      ctx.fillStyle=G.banner.col;ctx.textAlign="center";
      ctx.fillText(G.banner.t,W/2,H*0.38);
      ctx.font="7px 'Press Start 2P',monospace";ctx.fillStyle="#7f8cb8";
      if(G.mutator&&G.bannerT>60)ctx.fillText(MUTS[G.mutator].ds,W/2,H*0.38+16);
      ctx.globalAlpha=1;
    }
    if(G.flash>0){ctx.globalAlpha=G.flash/18;ctx.fillStyle="#fff";ctx.fillRect(0,0,W,H);ctx.globalAlpha=1;}
  }
  ctx.restore();
}
function drawHUD(){
  ctx.textAlign="left";ctx.font="7px 'Press Start 2P',monospace";
  ctx.fillStyle="#dfe8ff";ctx.fillText("SC "+G.score,5,10);
  ctx.fillStyle="#ffcf5c";ctx.textAlign="right";ctx.fillText("✦"+G.coins,W-5,10);
  ctx.textAlign="left";
  ctx.fillStyle="#7f8cb8";
  ctx.fillText(G.mode==="endless"?"WAVE "+G.wave:G.mode==="rush"?"BOSS RUSH":"STAGE "+G.stage+"-"+G.wave,5,20);
  if(G.combo>4){ctx.fillStyle="#ff9a3d";ctx.textAlign="right";
    ctx.fillText("x"+(1+Math.min(2,G.combo*0.02)).toFixed(1)+" COMBO "+G.combo,W-5,20);ctx.textAlign="left";}
  // 结构值血条（绿→红）+ 备用机体 + 炸弹
  const hpw=62,pc2=clamp(G.hp/G.maxHp,0,1);
  px(4,H-12,hpw+2,6,"#0d1226");
  px(5,H-11,hpw,4,"#3a1020");
  px(5,H-11,hpw*pc2,4,pc2>0.5?"#5cff9d":pc2>0.25?"#ffcf5c":"#ff5566");
  for(let i=0;i<G.stat.maxLives;i++){ctx.globalAlpha=i<G.lives?1:0.2;ctx.drawImage(SPR.heart,5+i*9,H-21);}
  ctx.globalAlpha=1;
  // 经验条
  px(0,H-3,W,3,"#0d1226");px(0,H-3,W*clamp(G.xp/G.xpNeed,0,1),3,"#43e8ff");
  ctx.fillStyle="#43e8ff";ctx.font="6px 'Press Start 2P',monospace";
  ctx.fillText("LV"+G.level,W-24,H-5);
  // 超频条
  const odw=54;
  px(W-odw-4,H-16,odw,4,"#0d1226");
  px(W-odw-4,H-16,odw*clamp(G.od/100,0,1),4,G.odActive>0?"#fff":"#ff9a3d");
  if(G.odActive>0){ctx.fillStyle="#ff9a3d";ctx.textAlign="center";ctx.fillText("暴走 OVERDRIVE",W/2,30);ctx.textAlign="left";}
  // 主武器装备栏图标
  for(let i=0;i<G.loadout.length;i++){
    const w=WEAPONS[G.loadout[i]],img=w.icon?ICONS[w.icon]:SPR[w.spr];
    if(img)ctx.drawImage(img,W-10-i*9,H-28,7,7);
  }
}
/* ================= 主循环 ================= */
function update(){
  G.time++;
  if(G.hitstop>0){G.hitstop--;return;}
  if(G.shake>0)G.shake*=0.85;if(G.shake<0.3)G.shake=0;
  if(G.flash>0)G.flash--;
  if(G.bannerT>0)G.bannerT--;
  if(G.comboT>0){G.comboT--;if(G.comboT===0)G.combo=0;}
  updatePlayer();
  if(G.demoSim)demoSpawn();else updateSpawner();
  for(const e of G.enemies){e.uid=e.uid||_uid++;updateEnemy(e);}
  G.enemies=G.enemies.filter(e=>!e.dead);
  updateBoss();
  updateBullets();
  collide();
  for(const q of G.parts){
    if(q.suck){q.vx+=(q.suck.x-q.x)*0.09;q.vy+=(q.suck.y-q.y)*0.09;}
    else{q.vx*=0.95;q.vy*=0.95;}
    if(q.grav)q.vy+=q.grav;
    q.x+=q.vx;q.y+=q.vy;q.life--;}
  G.parts=G.parts.filter(q=>q.life>0);
  for(const t of G.texts){t.y-=0.5;t.life--;}
  G.texts=G.texts.filter(t=>t.life>0);
}
let last=0,acc=0;
function loop(ts){
  requestAnimationFrame(loop);
  const dt=Math.min(100,ts-last);last=ts;
  MUS.tick();
  if(UI==="play"||UI==="demoSim"){
    acc+=dt;
    let steps=0;
    while(acc>=1000/60&&steps<4){update();acc-=1000/60;steps++;}
    if(steps===4)acc=0;
  }
  render();
}
requestAnimationFrame(loop);