diff --git a/admin/lib/schema.js b/admin/lib/schema.js
index e86119c..1e68672 100644
--- a/admin/lib/schema.js
+++ b/admin/lib/schema.js
@@ -173,8 +173,8 @@ module.exports = [
           { key: 'image', label: 'Bildschirmfoto', type: 'image' },
           { key: 'mobileImage', label: 'Handy-Ansicht (Hochformat, leer = kein Handy)', type: 'image' },
           { key: 'video', label: 'Video im Laptop (Pfad zu einer .mp4, leer = Standbild)', type: 'text' },
-          { key: 'fullImage', label: 'Ganze Seite, Computer (Pfad, öffnet sich beim Anklicken; leer = nicht vergrößerbar)', type: 'text' },
-          { key: 'fullMobileImage', label: 'Ganze Seite, Handy (Pfad, öffnet sich beim Anklicken)', type: 'text' },
+          { key: 'fullImage', label: 'Ganze Seite, Computer (Ordner mit Streifen, z. B. /mappe/ganz/name/; leer = nicht vergrößerbar)', type: 'text' },
+          { key: 'fullMobileImage', label: 'Ganze Seite, Handy (Ordner mit Streifen, z. B. /mappe/ganz/name-mobil/)', type: 'text' },
           { key: 'kategorie', label: 'Kategorie', type: 'text' },
           { key: 'titel', label: 'Titel / Name', type: 'text' },
           { key: 'aufgabe', label: 'Die Aufgabe (leer = nur Text zeigen)', type: 'textarea' },
diff --git a/content/site.json b/content/site.json
index 537a02e..9a424c9 100644
--- a/content/site.json
+++ b/content/site.json
@@ -187,8 +187,8 @@
         "image": "/mappe/elektro-rabe.webp",
         "mobileImage": "/mappe/elektro-rabe-mobil.webp",
         "video": "/mappe/elektro-rabe.mp4",
-        "fullImage": "/mappe/elektro-rabe-ganz.webp",
-        "fullMobileImage": "/mappe/elektro-rabe-mobil-ganz.webp"
+        "fullImage": "/mappe/ganz/elektro-rabe/",
+        "fullMobileImage": "/mappe/ganz/elektro-rabe-mobil/"
       },
       {
         "kategorie": "Konzeptarbeit · Tanzstudio",
@@ -199,8 +199,8 @@
         "image": "/mappe/maison-verte.webp",
         "mobileImage": "/mappe/maison-verte-mobil.webp",
         "video": "/mappe/maison-verte.mp4",
-        "fullImage": "/mappe/maison-verte-ganz.webp",
-        "fullMobileImage": "/mappe/maison-verte-mobil-ganz.jpg"
+        "fullImage": "/mappe/ganz/maison-verte/",
+        "fullMobileImage": "/mappe/ganz/maison-verte-mobil/"
       },
       {
         "kategorie": "Konzeptarbeit · Kosmetikstudio",
@@ -211,8 +211,8 @@
         "image": "/mappe/atelier-rosenhain.webp",
         "mobileImage": "/mappe/atelier-rosenhain-mobil.webp",
         "video": "",
-        "fullImage": "/mappe/atelier-rosenhain-ganz.webp",
-        "fullMobileImage": "/mappe/atelier-rosenhain-mobil-ganz.webp"
+        "fullImage": "/mappe/ganz/atelier-rosenhain/",
+        "fullMobileImage": "/mappe/ganz/atelier-rosenhain-mobil/"
       }
     ]
   },
diff --git a/public/mappe/atelier-rosenhain-ganz.webp b/public/mappe/atelier-rosenhain-ganz.webp
deleted file mode 100644
index 74c6cb4..0000000
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deleted file mode 100644
index 45fa622..0000000
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diff --git a/public/mappe/elektro-rabe-ganz.webp b/public/mappe/elektro-rabe-ganz.webp
deleted file mode 100644
index 881a3f0..0000000
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diff --git a/public/mappe/elektro-rabe-mobil-ganz.webp b/public/mappe/elektro-rabe-mobil-ganz.webp
deleted file mode 100644
index 7020cdf..0000000
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diff --git a/public/mappe/ganz/atelier-rosenhain-mobil/000-780x1700.webp b/public/mappe/ganz/atelier-rosenhain-mobil/000-780x1700.webp
new file mode 100644
index 0000000..52db114
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diff --git a/public/mappe/ganz/maison-verte/006-1440x791.webp b/public/mappe/ganz/maison-verte/006-1440x791.webp
new file mode 100644
index 0000000..2103188
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diff --git a/public/mappe/maison-verte-ganz.webp b/public/mappe/maison-verte-ganz.webp
deleted file mode 100644
index 33b3a34..0000000
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diff --git a/public/mappe/maison-verte-mobil-ganz.jpg b/public/mappe/maison-verte-mobil-ganz.jpg
deleted file mode 100644
index 97938db..0000000
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diff --git a/scripts/ganzseiten-kacheln.mjs b/scripts/ganzseiten-kacheln.mjs
new file mode 100644
index 0000000..13770e0
--- /dev/null
+++ b/scripts/ganzseiten-kacheln.mjs
@@ -0,0 +1,43 @@
+// Schneidet die Ganzseitenaufnahmen der Mappe in Streifen, damit die
+// Großansicht sofort etwas zeigt und der Rest beim Scrollen nachlädt.
+// Aufruf: node scripts/ganzseiten-kacheln.mjs <Ordner mit den PNGs>
+// Erwartet <name>.png (Computer, 1440 px breit) und <name>-mobil.png (Handy, 780 px).
+// Ergebnis: public/mappe/ganz/<name>[-mobil]/NNN-BREITExHOEHE.webp
+// Die Maße stehen im Dateinamen, so braucht der Build kein Bildwerkzeug.
+import sharp from 'sharp';
+import { mkdirSync, readdirSync, rmSync } from 'node:fs';
+import { join } from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const quelle = process.argv[2];
+if (!quelle) throw new Error('Ordner mit den PNGs angeben');
+const ziel = new URL('../public/mappe/ganz/', import.meta.url);
+
+// Erster Streifen klein (schnell sichtbar), danach größere
+const STREIFEN = { desktop: [900, 1800], mobil: [1700, 3200] };
+
+for (const datei of readdirSync(quelle).filter((f) => f.endsWith('.png') && !f.startsWith('v-'))) {
+  const name = datei.replace(/\.png$/, '');
+  const art = name.endsWith('-mobil') ? 'mobil' : 'desktop';
+  const pfad = join(quelle, datei);
+  const { width, height } = await sharp(pfad, { limitInputPixels: false }).metadata();
+  const ordner = new URL(`${name}/`, ziel);
+  rmSync(ordner, { recursive: true, force: true });
+  mkdirSync(ordner, { recursive: true });
+
+  let top = 0;
+  let i = 0;
+  let summe = 0;
+  while (top < height) {
+    const h = Math.min(i === 0 ? STREIFEN[art][0] : STREIFEN[art][1], height - top);
+    const out = new URL(`${String(i).padStart(3, '0')}-${width}x${h}.webp`, ordner);
+    const info = await sharp(pfad, { limitInputPixels: false })
+      .extract({ left: 0, top, width, height: h })
+      .webp({ quality: 80 })
+      .toFile(fileURLToPath(out));
+    summe += info.size;
+    top += h;
+    i++;
+  }
+  console.log(`${name}: ${i} Streifen, ${Math.round(summe / 1024)} KB`);
+}
diff --git a/src/components/Devices.astro b/src/components/Devices.astro
index 7fd0c65..bd278e6 100644
--- a/src/components/Devices.astro
+++ b/src/components/Devices.astro
@@ -6,10 +6,12 @@
  * Mit `screenZoom`/`phoneZoom` wird das Gerät anklickbar und öffnet die ganze
  * Seite in der Großansicht (<Zoom>, einmal pro Seite eingebunden).
  */
+import type { Streifen } from '../lib/ganzseiten';
+
 export interface ZoomSource {
   title: string;
-  desktop?: string;
-  mobile?: string;
+  desktop?: Streifen[];
+  mobile?: Streifen[];
 }
 
 interface Props {
@@ -27,8 +29,8 @@ const loading = eager ? 'eager' : 'lazy';
 const zoomAttrs = (z: ZoomSource, mode: 'desktop' | 'mobile') => ({
   'data-zoom': mode,
   'data-zoom-title': z.title,
-  'data-zoom-desktop': z.desktop || undefined,
-  'data-zoom-mobile': z.mobile || undefined,
+  'data-zoom-desktop': z.desktop ? JSON.stringify(z.desktop) : undefined,
+  'data-zoom-mobile': z.mobile ? JSON.stringify(z.mobile) : undefined,
   'aria-label': `${z.title} ${mode === 'desktop' ? 'am Computer' : 'auf dem Handy'} vergrößert ansehen`,
 });
 const laptopZoom = screenZoom && (screenZoom.desktop || screenZoom.mobile) ? screenZoom : undefined;
diff --git a/src/components/Zoom.astro b/src/components/Zoom.astro
index 634415f..5b3e598 100644
--- a/src/components/Zoom.astro
+++ b/src/components/Zoom.astro
@@ -25,12 +25,12 @@
     <div class="zoom-browser">
       <div class="zoom-browser-top" aria-hidden="true"><span></span><span></span><span></span></div>
       <div class="zoom-scroll" tabindex="0" aria-label="Seite am Computer, zum Durchscrollen">
-        <img alt="" decoding="async" data-slot="desktop" />
+        <div class="zoom-pages" data-slot="desktop"></div>
       </div>
     </div>
     <div class="zoom-phone">
       <div class="zoom-scroll" tabindex="0" aria-label="Seite auf dem Handy, zum Durchscrollen">
-        <img alt="" decoding="async" data-slot="mobile" />
+        <div class="zoom-pages" data-slot="mobile"></div>
       </div>
     </div>
   </div>
@@ -39,48 +39,145 @@
 </dialog>
 
 <script>
+  /*
+   * Die Aufnahmen liegen als Streifen vor (scripts/ganzseiten-kacheln.mjs).
+   * Schnell wird es durch drei Dinge:
+   * 1. Streifen haben feste Maße, die Seite steht sofort in voller Höhe.
+   * 2. Nur sichtbare Streifen laden, der Rest kurz bevor man hinscrollt.
+   * 3. Erste Streifen werden vorab geholt, sobald ein Gerät in Sichtweite
+   *    kommt, und beim Zeigen oder Antippen zusätzlich der zweite.
+   */
+  type Streifen = { src: string; w: number; h: number };
+  type Mode = 'desktop' | 'mobile';
+
+  const parse = (raw?: string): Streifen[] => {
+    try {
+      return raw ? (JSON.parse(raw) as Streifen[]) : [];
+    } catch {
+      return [];
+    }
+  };
+
+  const geholt = new Set<string>();
+  const vorab = (liste: Streifen[], anzahl: number) => {
+    liste.slice(0, anzahl).forEach(({ src }) => {
+      if (geholt.has(src)) return;
+      geholt.add(src);
+      const img = new Image();
+      img.decoding = 'async';
+      img.src = src;
+    });
+  };
+  const vorabFuer = (trigger: HTMLElement, anzahl: number) => {
+    const mode = trigger.dataset.zoom as Mode;
+    vorab(parse(mode === 'mobile' ? trigger.dataset.zoomMobile : trigger.dataset.zoomDesktop), anzahl);
+  };
+
   const dialog = document.querySelector<HTMLDialogElement>('dialog.zoom');
   if (dialog && typeof dialog.showModal === 'function') {
     const title = dialog.querySelector<HTMLElement>('.zoom-title')!;
     const stage = dialog.querySelector<HTMLElement>('.zoom-stage')!;
     const switcher = dialog.querySelector<HTMLElement>('.zoom-switch')!;
-    const imgs = {
-      desktop: dialog.querySelector<HTMLImageElement>('img[data-slot="desktop"]')!,
-      mobile: dialog.querySelector<HTMLImageElement>('img[data-slot="mobile"]')!,
+    const pages = {
+      desktop: dialog.querySelector<HTMLElement>('.zoom-pages[data-slot="desktop"]')!,
+      mobile: dialog.querySelector<HTMLElement>('.zoom-pages[data-slot="mobile"]')!,
+    };
+    let sources: Record<Mode, Streifen[]> = { desktop: [], mobile: [] };
+    const observers: Partial<Record<Mode, IntersectionObserver>> = {};
+
+    const laden = (img: HTMLImageElement) => {
+      if (img.dataset.src) {
+        img.src = img.dataset.src;
+        delete img.dataset.src;
+      }
+    };
+
+    const aufbauen = (mode: Mode) => {
+      const box = pages[mode];
+      const key = sources[mode].map((s) => s.src).join('|');
+      if (box.dataset.key === key) return;
+      box.dataset.key = key;
+      observers[mode]?.disconnect();
+      box.replaceChildren();
+      const scroller = box.closest<HTMLElement>('.zoom-scroll')!;
+      // Streifen erst laden, wenn sie in die Nähe des sichtbaren Bereichs kommen
+      const io =
+        'IntersectionObserver' in window
+          ? new IntersectionObserver(
+              (entries) => {
+                entries.forEach((e) => {
+                  if (!e.isIntersecting) return;
+                  laden(e.target as HTMLImageElement);
+                  io?.unobserve(e.target);
+                });
+              },
+              { root: scroller, rootMargin: '1500px 0px' },
+            )
+          : undefined;
+      observers[mode] = io;
+      sources[mode].forEach((s, i) => {
+        const img = document.createElement('img');
+        img.alt = '';
+        img.decoding = 'async';
+        if (s.w && s.h) {
+          img.width = s.w;
+          img.height = s.h;
+        }
+        if (i < 2 || !io) {
+          if (i === 0) img.setAttribute('fetchpriority', 'high');
+          img.src = s.src;
+        } else {
+          img.dataset.src = s.src;
+          io.observe(img);
+        }
+        box.append(img);
+      });
     };
-    type Mode = keyof typeof imgs;
-    let sources: Record<Mode, string> = { desktop: '', mobile: '' };
 
     const show = (mode: Mode) => {
       stage.dataset.mode = mode;
       switcher.querySelectorAll<HTMLButtonElement>('button').forEach((b) => {
         b.setAttribute('aria-pressed', String(b.dataset.mode === mode));
       });
-      const img = imgs[mode];
-      if (img.getAttribute('src') !== sources[mode]) {
-        img.classList.remove('is-loaded');
-        img.src = sources[mode];
-      }
-      img.closest('.zoom-scroll')!.scrollTop = 0;
+      aufbauen(mode);
+      pages[mode].closest('.zoom-scroll')!.scrollTop = 0;
+      // die andere Ansicht schon mal anwärmen
+      vorab(sources[mode === 'desktop' ? 'mobile' : 'desktop'], 1);
     };
 
-    Object.values(imgs).forEach((img) => {
-      img.addEventListener('load', () => img.classList.add('is-loaded'));
+    // Vorab holen: erster Streifen, sobald ein Gerät in Sichtweite ist
+    const trigger = document.querySelectorAll<HTMLElement>('[data-zoom]');
+    if ('IntersectionObserver' in window) {
+      const nah = new IntersectionObserver(
+        (entries) => {
+          entries.forEach((e) => {
+            if (!e.isIntersecting) return;
+            vorabFuer(e.target as HTMLElement, 1);
+            nah.unobserve(e.target);
+          });
+        },
+        { rootMargin: '300px 0px' },
+      );
+      trigger.forEach((t) => nah.observe(t));
+    }
+    // Absicht erkennen: Maus drauf, Finger drauf, Tastaturfokus, dann den zweiten Streifen dazu
+    trigger.forEach((t) => {
+      const absicht = () => vorabFuer(t, 2);
+      t.addEventListener('pointerenter', absicht, { passive: true });
+      t.addEventListener('touchstart', absicht, { passive: true });
+      t.addEventListener('focus', absicht);
     });
 
     document.addEventListener('click', (event) => {
-      const trigger = (event.target as Element).closest<HTMLElement>('[data-zoom]');
-      if (!trigger) return;
-      sources = {
-        desktop: trigger.dataset.zoomDesktop || '',
-        mobile: trigger.dataset.zoomMobile || '',
-      };
-      title.textContent = trigger.dataset.zoomTitle || '';
-      switcher.hidden = !(sources.desktop && sources.mobile);
-      const wanted = trigger.dataset.zoom as Mode;
-      show(sources[wanted] ? wanted : sources.desktop ? 'desktop' : 'mobile');
+      const t = (event.target as Element).closest<HTMLElement>('[data-zoom]');
+      if (!t) return;
+      sources = { desktop: parse(t.dataset.zoomDesktop), mobile: parse(t.dataset.zoomMobile) };
+      title.textContent = t.dataset.zoomTitle || '';
+      switcher.hidden = !(sources.desktop.length && sources.mobile.length);
+      const wanted = t.dataset.zoom as Mode;
       dialog.showModal();
       document.documentElement.classList.add('zoom-open');
+      show(sources[wanted].length ? wanted : sources.desktop.length ? 'desktop' : 'mobile');
     });
 
     switcher.addEventListener('click', (event) => {
@@ -257,16 +354,13 @@
     background: #fff;
   }
 
-  .zoom-scroll img {
+  /* Streifen liegen lückenlos untereinander; bis sie da sind, zeigt die
+     feste Höhe eine helle Fläche statt eines Sprungs */
+  .zoom-pages :global(img) {
     display: block;
     width: 100%;
     height: auto;
-    opacity: 0;
-    transition: opacity 0.25s;
-  }
-
-  .zoom-scroll img.is-loaded {
-    opacity: 1;
+    background: #f1efe9;
   }
 
   .zoom-hint {
@@ -302,9 +396,4 @@
     }
   }
 
-  @media (prefers-reduced-motion: reduce) {
-    .zoom-scroll img {
-      transition: none;
-    }
-  }
 </style>
diff --git a/src/lib/ganzseiten.ts b/src/lib/ganzseiten.ts
new file mode 100644
index 0000000..1cf2117
--- /dev/null
+++ b/src/lib/ganzseiten.ts
@@ -0,0 +1,28 @@
+import { readdirSync } from 'node:fs';
+import { join } from 'node:path';
+
+export interface Streifen {
+  src: string;
+  w: number;
+  h: number;
+}
+
+/**
+ * Liest die Streifen einer Ganzseitenaufnahme aus public/<ordner> (beim Build).
+ * Dateinamen: NNN-BREITExHOEHE.webp, erzeugt von scripts/ganzseiten-kacheln.mjs.
+ * Ein einzelner Bildpfad statt eines Ordners geht auch (ein Streifen ohne Maße).
+ */
+export function streifen(ordner?: string): Streifen[] | undefined {
+  if (!ordner) return undefined;
+  if (!ordner.endsWith('/')) return [{ src: ordner, w: 0, h: 0 }];
+  try {
+    const liste = readdirSync(join(process.cwd(), 'public', ordner))
+      .map((f) => f.match(/^\d+-(\d+)x(\d+)\.(webp|jpg|png)$/) && { f, m: f.match(/^\d+-(\d+)x(\d+)/)! })
+      .filter((x): x is { f: string; m: RegExpMatchArray } => Boolean(x))
+      .sort((a, b) => a.f.localeCompare(b.f))
+      .map(({ f, m }) => ({ src: ordner + f, w: Number(m[1]), h: Number(m[2]) }));
+    return liste.length ? liste : undefined;
+  } catch {
+    return undefined;
+  }
+}
diff --git a/src/pages/index.astro b/src/pages/index.astro
index 529261d..f1ec07c 100644
--- a/src/pages/index.astro
+++ b/src/pages/index.astro
@@ -4,6 +4,7 @@ import Devices from '../components/Devices.astro';
 import Zoom from '../components/Zoom.astro';
 import Kicker from '../components/Kicker.astro';
 import { site, rich } from '../lib/content';
+import { streifen } from '../lib/ganzseiten';
 
 const { hero, warum, preis, highlights, leistungen, mappe, ablauf, about, faq, kontakt } = site;
 
@@ -11,7 +12,7 @@ const { hero, warum, preis, highlights, leistungen, mappe, ablauf, about, faq, k
 type MappeItem = (typeof mappe.items)[number];
 const zoomFor = (item?: MappeItem) =>
   item && !item.nameHidden && (item.fullImage || item.fullMobileImage)
-    ? { title: item.titel, desktop: item.fullImage, mobile: item.fullMobileImage }
+    ? { title: item.titel, desktop: streifen(item.fullImage), mobile: streifen(item.fullMobileImage) }
     : undefined;
 const findItem = (src: string) =>
   mappe.items.find((i) => src && (i.image === src || i.mobileImage === src));