diff --git a/topic/huafei/index.html b/topic/huafei/index.html
index 535c2a6..29695f1 100644
--- a/topic/huafei/index.html
+++ b/topic/huafei/index.html
@@ -11,7 +11,8 @@
        ② 问题（按所选阶段出现）：你是女生/男生 → 算哪一段（多选，默认全部）→ 城市 → 头胎二胎 → 0～3 岁谁带 → 上学路线 → 课外班 → 家庭月收入（可跳过）；
        ③ 账单只列所选阶段，每段 12～24 项明细，单项取中间值、小计合计能加对；1/2/3 岁累计只在含 0～1 / 1～3 岁时显示；
        ④ 填了收入：账单里给「≈ 你家 X 个月 / X 年收入」+ 所选阶段平均每月占收入比例条；收尾卡、生成卡片呼应一句；收入只存本机；
-       ⑤ 收尾卡、复制、生成卡片、推荐工具、打印动画同 v4。改价格只改脚本里的 COST 表。
+       ⑤ 收尾卡、复制、生成卡片、推荐工具、打印动画同 v4；
+       ⑥ v6（11-01）：账单下加「保存账单图片」，canvas 把整张小票画成长图（宽 750，高按内容，超 15800px 先压行高再整体缩小），复用卡片弹层、长图可滚动。改价格只改脚本里的 COST 表。
      存储 localStorage「mmbox.huafei.v5」（兼容读取 v4）。推荐工具走 ../_shared/tools.js；自成一页：不引 app.js；
      返回走 history.back 或相对路径 ../../ 并带回 search + hash。v4 备份 /tmp/huafei5/huafei-v4-before-v5.html。 -->
 <style>
@@ -245,7 +246,8 @@ h1 .mk{background:linear-gradient(transparent 64%,rgba(24,160,88,.24) 0)}
 .bc{display:block;width:78%;height:40px;margin:10px auto 2px}
 .rc-no{font-size:10.5px;letter-spacing:.3em;color:var(--s)}
 
-.racts{display:flex;gap:10px;margin-top:6px}
+.savebill{margin-top:6px}
+.racts{display:flex;gap:10px;margin-top:10px}
 .racts .btn{flex:1;height:44px;font-size:15px}
 
 /* ============ 情感收尾 ============ */
@@ -277,7 +279,10 @@ h1 .mk{background:linear-gradient(transparent 64%,rgba(24,160,88,.24) 0)}
 .toast.on{opacity:1;transform:translate(-50%,0)}
 .mask{position:fixed;inset:0;z-index:50;display:none;flex-direction:column;align-items:center;justify-content:center;padding:24px 28px calc(24px + env(safe-area-inset-bottom));background:rgba(18,28,22,.82)}
 .mask.on{display:flex;animation:fd .25s ease both}
-.mask img{max-width:100%;max-height:calc(100% - 96px);border-radius:16px;box-shadow:0 12px 32px rgba(0,0,0,.25);-webkit-touch-callout:default;user-select:auto}
+.mwrap{max-width:100%;max-height:calc(100% - 96px);display:flex;border-radius:16px;box-shadow:0 12px 32px rgba(0,0,0,.25)}
+.mask img{max-width:100%;max-height:100%;border-radius:16px;-webkit-touch-callout:default;user-select:auto}
+.mask.long .mwrap{display:block;width:100%;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;background:#EAF7F0}
+.mask.long img{width:100%;max-height:none;border-radius:0}
 .mask p{margin-top:14px;color:#fff;font-size:14.5px;font-weight:600;display:flex;align-items:center;gap:6px}
 .mask .row{display:flex;gap:16px;margin-top:10px}
 .mask .row button,.mask .row a{height:34px;padding:0 18px;border-radius:99px;border:1px solid rgba(255,255,255,.6);color:#fff;font-size:13.5px;line-height:32px;text-decoration:none}
@@ -370,6 +375,7 @@ h1 .mk{background:linear-gradient(transparent 64%,rgba(24,160,88,.24) 0)}
     <div class="printer" id="printer"><span class="lb">BILL</span><span class="led"></span></div>
     <div class="feed" id="feed"><div class="paper" id="paper"></div></div>
 
+    <button class="btn press savebill" id="billBtn"><svg class="ic"><use href="#i-img" xlink:href="#i-img"/></svg>保存账单图片</button>
     <div class="racts">
       <button class="btn ghost press" id="reRoute"><svg class="ic"><use href="#i-refresh" xlink:href="#i-refresh"/></svg>换条路线再算</button>
       <button class="btn ghost press" id="reAns"><svg class="ic"><use href="#i-edit" xlink:href="#i-edit"/></svg>改一下答案</button>
@@ -398,8 +404,8 @@ h1 .mk{background:linear-gradient(transparent 64%,rgba(24,160,88,.24) 0)}
 </div>
 
 <div class="mask" id="mask">
-  <img id="maskImg" alt="给妈妈的卡片">
-  <p><svg class="ic"><use href="#i-hand" xlink:href="#i-hand"/></svg>长按图片，保存或发给妈妈</p>
+  <div class="mwrap" id="mwrap"><img id="maskImg" alt="给妈妈的卡片"></div>
+  <p><svg class="ic"><use href="#i-hand" xlink:href="#i-hand"/></svg><span id="maskTip">长按图片，保存或发给妈妈</span></p>
   <div class="row"><a id="dlBtn" download="给妈妈的卡片.png" hidden>下载图片</a><button id="maskClose">关闭</button></div>
 </div>
 <div class="toast" id="toast"></div>
@@ -1110,12 +1116,216 @@ h1 .mk{background:linear-gradient(transparent 64%,rgba(24,160,88,.24) 0)}
   $('#cardBtn').addEventListener('click', function () {
     if (!bill) return;
     try {
-      var url = drawCard();
-      $('#maskImg').src = url;
-      var dl = $('#dlBtn'); dl.href = url; dl.hidden = isWx;
-      $('#mask').classList.add('on');
+      openMask(drawCard(), '给妈妈的卡片', '给妈妈的卡片.png', '长按图片，保存或发给妈妈', false);
     } catch (e) { toast('生成失败，截个图保存也可以'); }
   });
+  /* ================= 保存账单图片：把整张小票原样画成长图（宽 750，高按内容算） =================
+     iOS 单张 canvas 建议 ≤ 约 16000px 高 / 1600 万像素：先按标准行高量一遍，超了就压行高（最低 32），仍超就整体缩小。 */
+  var BILL_MAX_H = 15800;
+  function drawBill() {
+    var b = bill, R = ROUTES[route], s = b.s, st = sel(), inc = incomeOf(b);
+    var sexW = A.sex === 1 ? '准爸爸' : '准妈妈';
+    var nodes = [];
+    if (b.n1 != null) nodes.push(['养到 1 岁累计', b.n1]);
+    if (b.n2 != null) { nodes.push(['养到 2 岁累计', b.n2]); nodes.push(['养到 3 岁累计', b.n3]); }
+    var tipNodes = nodes.length && ([0, 1, 2].some(function (i) { return st.indexOf(i) < 0; }) || (b.n2 != null && st.indexOf(3) < 0));
+    var meta = [['账单号', billNo], ['日期', billAt], ['路线', '0' + (route + 1) + ' ' + R.who + ' · ' + R.how],
+      ['家庭', CITY_S[s.city] + ' · ' + (s.kid ? '二胎' : '头胎') + ' · ' + sexW], ['范围', b.range + ' · ' + b.n + ' 项'], ['收银员', '兜爸']];
+    var W = 750, PX = 34, PW = W - PX * 2, X0 = PX + 34, X1 = W - PX - 34;
+    var mc = document.createElement('canvas').getContext('2d');
+
+    // 画一遍（dry=true 时只量高度）
+    function paint(c, dry, rh) {
+      var y = 0;
+      function T(text, x, yy, font, color, align) { if (dry) return; c.font = font; c.fillStyle = color; c.textAlign = align || 'left'; c.fillText(text, x, yy); }
+      function tw(text, font) { mc.font = font; return mc.measureText(text).width; }
+      function dash(yy, solid, dbl) {
+        if (dry) return;
+        c.save(); c.strokeStyle = solid ? '#2B2F36' : '#C9CED4'; c.lineWidth = solid ? 2 : 2.5;
+        if (!solid) c.setLineDash([9, 7]);
+        c.beginPath(); c.moveTo(X0, yy); c.lineTo(X1, yy); c.stroke();
+        if (dbl) { c.beginPath(); c.moveTo(X0, yy + 6); c.lineTo(X1, yy + 6); c.stroke(); }
+        c.restore();
+      }
+      function row(name, val, yy, o) {   // 名称左、金额右对齐，中间点线
+        o = o || {};
+        var fn = (o.bold ? '800 ' : '400 ') + (o.fs || 26) + 'px ' + FONT, fv = (o.bold ? '800 ' : '500 ') + (o.vs || o.fs || 26) + 'px ' + MONO;
+        T(name, X0, yy, fn, o.c || '#3B4048');
+        T(val, X1, yy, fv, o.vc || o.c || '#2B2F36', 'right');
+        if (!dry && o.dots !== false) {
+          var a = X0 + tw(name, fn) + 12, z = X1 - tw(val, fv) - 12;
+          if (z > a) { c.save(); c.fillStyle = '#C3C8CE'; for (var x = a; x < z; x += 7) c.fillRect(x, yy - 8, 2.5, 2.5); c.restore(); }
+        }
+      }
+      // 纸外顶部
+      y = 40;
+      var paperTop = y;
+      if (!dry) {   // 纸先画出来（高度在 dry 阶段已量好）
+        var ph = paint.ph, n = Math.round(PW / 22), tw2 = PW / n;
+        c.save(); c.shadowColor = 'rgba(30,60,45,.16)'; c.shadowBlur = 28; c.shadowOffsetY = 8; c.fillStyle = '#fff';
+        c.beginPath(); c.moveTo(PX, paperTop);
+        for (var i = 0; i < n; i++) { c.lineTo(PX + tw2 * i + tw2 / 2, paperTop - 11); c.lineTo(PX + tw2 * (i + 1), paperTop); }
+        c.lineTo(PX + PW, paperTop + ph);
+        for (var j = n; j > 0; j--) { c.lineTo(PX + tw2 * j - tw2 / 2, paperTop + ph + 11); c.lineTo(PX + tw2 * (j - 1), paperTop + ph); }
+        c.closePath(); c.fill(); c.restore();
+      }
+      // 表头
+      y += 74;
+      if (!dry) {
+        var lg = '兜爸心选 · 养娃账单', lf = '800 36px ' + FONT, lw = tw(lg, lf);
+        T(lg, W / 2 + 20, y, lf, '#1F2329', 'center');
+        c.save(); c.strokeStyle = '#18A058'; c.lineWidth = 3.4; c.lineCap = 'round';   // 小叶子
+        var lx = W / 2 + 20 - lw / 2 - 30, ly = y - 13;
+        c.beginPath(); c.moveTo(lx - 12, ly + 12); c.quadraticCurveTo(lx - 12, ly - 12, lx + 14, ly - 14); c.quadraticCurveTo(lx + 12, ly + 12, lx - 12, ly + 12); c.stroke();
+        c.beginPath(); c.moveTo(lx - 12, ly + 12); c.lineTo(lx + 2, ly - 2); c.stroke(); c.restore();
+      }
+      y += 42;
+      T((b.isAll ? '从怀孕一直算到 18 岁' : b.range).split('').join(' '), W / 2, y, '400 22px ' + FONT, '#86909C', 'center');
+      y += 30;
+      meta.forEach(function (m) { y += 40; row(m[0], m[1], y, { fs: 24, c: '#4E5969', vc: '#4E5969', dots: false }); });
+      y += 26; dash(y, true);
+      y += 40; row('项目', '金额（元）', y, { fs: 22, c: '#86909C', vc: '#86909C', dots: false });
+      // 各段
+      b.segs.forEach(function (sg) {
+        y += 22; dash(y);
+        y += 54;
+        if (!dry) {
+          var no = '0' + (sg.i + 1), nf = '700 20px ' + MONO, nw = tw(no, nf) + 16;
+          c.fillStyle = '#18A058'; rr(c, X0, y - 26, nw, 32, 7); c.fill();
+          T(no, X0 + nw / 2, y - 3, nf, '#fff', 'center');
+          var tf = '800 28px ' + FONT;
+          T(sg.t, X0 + nw + 12, y, tf, '#1F2329');
+          T(sg.a + ' · ' + sg.it.length + ' 项', X0 + nw + 12 + tw(sg.t, tf) + 14, y, '400 21px ' + FONT, '#86909C');
+        }
+        y += 10;
+        sg.it.forEach(function (x) {
+          y += rh;
+          var neg = x.m < 0;
+          row(x.n, money(x.m), y, { c: neg ? '#18A058' : '#3B4048', vc: neg ? '#18A058' : '#2B2F36' });
+        });
+        y += 20;
+        if (!dry) { c.fillStyle = '#EEF0F3'; c.fillRect(X0, y, X1 - X0, 2); }
+        y += 42; row('小计', money(sg.m), y, { bold: true, fs: 26, vs: 28, c: '#1F2329', dots: false });
+      });
+      // 合计
+      y += 30; dash(y, true, true);
+      y += 82;
+      T('合　计', X0, y - 6, '800 30px ' + FONT, '#1F2329');
+      T('¥' + money(b.m), X1, y, '800 60px ' + MONO, '#1F2329', 'right');
+      y += 42;
+      if (!dry) {
+        var rg = '，区间 ' + wr(b.lo, b.hi), rf = '400 24px ' + FONT, ef = '800 24px ' + FONT, em = w(b.m) + ' 万';
+        T(rg, X1, y, rf, '#4E5969', 'right');
+        var x2 = X1 - tw(rg, rf);
+        T(em, x2, y, ef, '#18A058', 'right'); x2 -= tw(em, ef) + 4;
+        T('约', x2, y, rf, '#4E5969', 'right');
+      }
+      if (nodes.length) {
+        y += 28;
+        var bh = 104, cw = (X1 - X0) / nodes.length;
+        if (!dry) {
+          c.save(); c.strokeStyle = '#C9CED4'; c.lineWidth = 2.5; c.setLineDash([9, 7]);
+          rr(c, X0, y, X1 - X0, bh, 18); c.stroke();
+          for (var k = 1; k < nodes.length; k++) { c.beginPath(); c.moveTo(X0 + cw * k, y); c.lineTo(X0 + cw * k, y + bh); c.stroke(); }
+          c.restore();
+          nodes.forEach(function (nd, k2) {
+            var cx = X0 + cw * k2 + cw / 2;
+            T(nd[0], cx, y + 38, '400 21px ' + FONT, '#86909C', 'center');
+            T(w(nd[1]) + '万', cx, y + 80, '800 30px ' + MONO, '#1F2329', 'center');
+          });
+        }
+        y += bh;
+        if (tipNodes) { y += 34; T('累计只算你选的阶段，没选的不计入', X0, y, '400 21px ' + FONT, '#86909C'); }
+      }
+      if (inc) {
+        y += 28;
+        var ih = 236, iy = y, pw2 = Math.min(100, inc.pct), hot = inc.pct > 50;
+        if (!dry) {
+          c.save(); c.fillStyle = '#F6FAF8'; rr(c, X0, iy, X1 - X0, ih, 18); c.fill();
+          c.strokeStyle = '#BFE3CE'; c.lineWidth = 2.5; c.setLineDash([9, 7]); c.stroke(); c.restore();
+          var ix = X0 + 24, ix1 = X1 - 24;
+          var h1 = '按你家月收入 ', h1f = '400 22px ' + FONT;
+          T(h1, ix, iy + 44, h1f, '#86909C');
+          var hx = ix + tw(h1, h1f);
+          T('¥' + money(inc.inc), hx, iy + 44, '800 22px ' + MONO, '#1F2329');
+          T(' 算', hx + tw('¥' + money(inc.inc), '800 22px ' + MONO), iy + 44, h1f, '#86909C');
+          var a1 = '这张账单 ≈ 你家 ', af = '800 28px ' + FONT, bf = '800 38px ' + FONT;
+          T(a1, ix, iy + 94, af, '#1F2329');
+          var ax = ix + tw(a1, af);
+          T(inc.txt, ax, iy + 94, bf, '#18A058');
+          T('的收入', ax + tw(inc.txt, bf) + 4, iy + 94, af, '#1F2329');
+          c.fillStyle = '#E3EEE8'; rr(c, ix, iy + 116, ix1 - ix, 18, 9); c.fill();
+          var gr = c.createLinearGradient(ix, 0, ix1, 0);
+          if (hot) { gr.addColorStop(0, '#F2B57A'); gr.addColorStop(1, '#D9823B'); } else { gr.addColorStop(0, '#79CC9E'); gr.addColorStop(1, '#18A058'); }
+          c.fillStyle = gr; rr(c, ix, iy + 116, Math.max(18, (ix1 - ix) * pw2 / 100), 18, 9); c.fill();
+          T('所选阶段平均每月花 ¥' + money(r100(inc.avg)), ix, iy + 170, '400 23px ' + FONT, '#4E5969');
+          T('占收入 ' + Math.round(inc.pct) + '%', ix1, iy + 170, '800 23px ' + FONT, hot ? '#B4733A' : '#1F2329', 'right');
+          T(inc.pct <= 20 ? '压力不大，按自己的节奏来。' : inc.pct <= 35 ? '要花心思规划，但扛得住。' : inc.pct <= 50 ? '会比较吃紧，提前存一笔会从容很多。' : '超出不少，可以换条路线看看，或把大项往后挪一挪。',
+            ix, iy + 210, '400 21px ' + FONT, '#86909C');
+        }
+        y += ih;
+      }
+      y += 24;
+      if (!inc) { y += 34; row(b.isAll ? '平均每月' : '所选阶段平均每月', money(r100(b.m / (b.months || 1))), y, { fs: 23, c: '#4E5969', vc: '#4E5969' }); }
+      if (has(st, [8])) {
+        y += 40; row('如果还上大学（' + b.col.n + '）', '+' + wr(b.col.v[0], b.col.v[1]), y, { fs: 23, c: '#4E5969', vc: '#4E5969' });
+        y += 34; T('（大学不计入合计）', X0, y, '400 21px ' + FONT, '#B5BAC2');
+      }
+      y += 42; row('时间、心思和拥抱', '无法计价', y, { fs: 24, bold: true, c: '#B4733A', vc: '#B4733A' });
+      y += 28; dash(y);
+      y += 56; T('谢 谢 惠 顾', W / 2, y, '800 28px ' + FONT, '#1F2329', 'center');
+      y += 38; T('宝宝一经签收，不退不换', W / 2, y, '400 22px ' + FONT, '#86909C', 'center');
+      y += 32; T('账单按行情中间值估算，仅供参考', W / 2, y, '400 22px ' + FONT, '#86909C', 'center');
+      y += 26;
+      if (!dry) {   // 条码（与页面同一个种子）
+        var bx = W / 2 - 230, sd = +billNo.slice(-5) || 7, xx = 0, k3 = 460 / 236;
+        c.fillStyle = '#2B2F36';
+        while (xx < 236) { sd = (sd * 9301 + 49297) % 233280; var bw = 1 + (sd % 3), gp = 1 + ((sd >> 3) % 3); c.fillRect(bx + xx * k3, y, bw * k3, 78); xx += bw + gp; }
+      }
+      y += 78 + 32;
+      T(billNo.split('').join(' '), W / 2, y, '500 20px ' + MONO, '#86909C', 'center');
+      y += 34;
+      paint.ph = y - paperTop;
+      // 纸外落款
+      y += 11 + 56;
+      T('兜爸心选', W / 2, y, '800 28px ' + FONT, '#18A058', 'center');
+      y += 36;
+      T('孕期专题 · 生娃计算器 · 估算仅供参考', W / 2, y, '400 21px ' + FONT, '#86909C', 'center');
+      y += 44;
+      return y;
+    }
+    var nItems = b.n, rh = 46, H = paint(null, true, rh);
+    if (H > BILL_MAX_H) { rh = Math.max(32, rh - Math.ceil((H - BILL_MAX_H) / nItems)); H = paint(null, true, rh); }
+    var k = Math.min(1, BILL_MAX_H / H, Math.sqrt(16000000 / (W * H)));   // 仍超就整体缩小
+    var cv = document.createElement('canvas');
+    cv.width = Math.round(W * k); cv.height = Math.round(H * k);
+    var c = cv.getContext('2d');
+    c.scale(k, k);
+    var g = c.createLinearGradient(0, 0, 0, H);
+    g.addColorStop(0, '#EAF7F0'); g.addColorStop(.5, '#F5FBF8'); g.addColorStop(1, '#EAF7F0');
+    c.fillStyle = g; c.fillRect(0, 0, W, H);
+    c.textBaseline = 'alphabetic';
+    paint(c, false, rh);
+    return cv.toDataURL('image/png');
+  }
+  function openMask(url, alt, name, tip, long) {
+    var im = $('#maskImg'); im.src = url; im.alt = alt;
+    $('#maskTip').textContent = tip;
+    var dl = $('#dlBtn'); dl.href = url; dl.download = name; dl.hidden = isWx;
+    var m = $('#mask'); m.classList.toggle('long', !!long); m.classList.add('on');
+    $('#mwrap').scrollTop = 0;
+  }
+  $('#billBtn').addEventListener('click', function () {
+    if (!bill) return;
+    toast('正在生成账单图片…');
+    setTimeout(function () {
+      try {
+        var url = drawBill();
+        $('#toast').classList.remove('on');
+        openMask(url, '我的养娃账单', '养娃账单.png', '长按图片，保存到相册', true);
+      } catch (e) { toast('生成失败，截个图保存也可以'); }
+    }, 30);
+  });
   $('#maskClose').addEventListener('click', function () { $('#mask').classList.remove('on'); });
   $('#mask').addEventListener('click', function (e) { if (e.target === this) this.classList.remove('on'); });
 
@@ -1191,7 +1401,7 @@ h1 .mk{background:linear-gradient(transparent 64%,rgba(24,160,88,.24) 0)}
     var dy = e.touches[0].clientY - y0;
     if ((sc.scrollTop <= 0 && dy > 0) || (sc.scrollTop + sc.clientHeight >= sc.scrollHeight - 1 && dy < 0)) e.preventDefault();
   }, { passive: false });
-  document.addEventListener('touchmove', function (e) { if (!sc.contains(e.target)) e.preventDefault(); }, { passive: false });
+  document.addEventListener('touchmove', function (e) { if (!sc.contains(e.target) && !(e.target.closest && e.target.closest('.mask.long .mwrap'))) e.preventDefault(); }, { passive: false });
 })();
 </script>
 </body>