diff --git a/assets/images/hero/hero.webp b/assets/images/hero/hero.webp
new file mode 100644
index 0000000..df1856c
Binary files /dev/null and b/assets/images/hero/hero.webp differ
diff --git a/css/sections/hero.css b/css/sections/hero.css
index 67d9e00..fdd54bc 100644
--- a/css/sections/hero.css
+++ b/css/sections/hero.css
@@ -1,9 +1,227 @@
 /* =========================================================
    US01-01: Angebot und Zielgruppe sofort sehen (Hero)
-   Branch: feature/US01-01-hero
+   Branch: feature_US01-01
    Nur Selektoren unter #hero verwenden.
    Farben/Schriften über var(--th-...) aus base.css.
+   Vorlage: Prototyp (Hero-Bereich)
    ========================================================= */
 
 #hero {
+  --hero-mint: #56d9b1;                       /* helle Akzentvariante aus dem Prototyp */
+  --hero-line: rgb(255 255 255 / 0.11);
+  padding-block: clamp(2rem, 6svh, 4.5rem);   /* überschreibt Sektionsabstand aus base.css */
+  min-height: calc(100svh - 4.5rem);          /* ohne Scrollen sichtbar (minus Header) */
+  display: flex;
+  align-items: center;
+}
+
+#hero .hero-grid {
+  display: grid;
+  grid-template-columns: 1.08fr 1fr;
+  gap: 4rem;
+  align-items: center;
+  width: 100%;
+}
+
+/* ---------- Text ---------- */
+#hero h1 {
+  margin: 0;
+  font-weight: 400;
+}
+
+#hero .hero-kicker {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+  font-family: var(--th-font-body);
+  font-size: 1rem;
+  font-weight: 650;
+  letter-spacing: 0.12em;
+  text-transform: uppercase;
+  color: var(--hero-mint);
+  line-height: 1.5;
+}
+
+#hero .hero-line {
+  flex: 0 0 1.5rem;
+  height: 1px;
+  background: var(--th-accent);
+}
+
+#hero .hero-headline {
+  display: block;
+  margin-top: 1.5rem;
+  font-family: var(--th-font-display);
+  font-size: clamp(2.6rem, 4.8vw, 4.5rem);
+  line-height: 1.1;
+  letter-spacing: -0.03em;
+  color: var(--th-text);
+}
+
+#hero .hero-headline em {
+  color: var(--hero-mint);
+}
+
+#hero .hero-intro {
+  margin-top: 1.5rem;
+  max-width: 32rem;
+  font-size: 1.1875rem;
+  line-height: 1.75;
+  color: var(--th-text-muted);
+}
+
+/* ---------- Aktionen ---------- */
+#hero .hero-actions {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 1.75rem;
+  margin-top: 2rem;
+}
+
+#hero .hero-button {
+  display: inline-flex;
+  align-items: center;
+  gap: 1.25rem;
+  min-height: 3.25rem;                         /* große Klickfläche */
+  padding: 0.9rem 1.6rem;
+  border-radius: 7px;
+  background: var(--th-accent);
+  color: #071b16;
+  font-size: 1.125rem;
+  font-weight: 650;
+  transition: background 0.2s, transform 0.2s;
+}
+
+#hero .hero-button:hover {
+  background: #37c99b;
+  transform: translateY(-2px);
+}
+
+#hero .hero-link {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.75rem;
+  min-height: 2.75rem;
+  font-size: 1.125rem;
+  font-weight: 600;
+  color: var(--th-text-soft);
+}
+
+#hero .hero-link:hover {
+  color: var(--hero-mint);
+}
+
+#hero .hero-note {
+  margin-top: 1.75rem;
+  font-size: 1rem;
+  color: var(--th-text-muted);
+}
+
+#hero .hero-note span {
+  margin-right: 0.5rem;
+  color: var(--hero-mint);
+}
+
+/* ---------- Bild ---------- */
+#hero .hero-visual {
+  position: relative;
+  margin: 0;
+  height: clamp(340px, 62svh, 560px);
+  border-radius: 15px;
+  overflow: hidden;
+  background: var(--th-bg-elevated);
+}
+
+#hero .hero-visual img {
+  width: 100%;
+  height: 100%;
+  object-fit: cover;
+}
+
+#hero .hero-visual::after {                    /* Verlauf für lesbare Bildunterschrift */
+  content: "";
+  position: absolute;
+  inset: 35% 0 0;
+  background: linear-gradient(transparent, rgb(5 15 18 / 0.94));
+}
+
+#hero figcaption {
+  position: absolute;
+  left: 2rem;
+  bottom: 2rem;
+  z-index: 1;
+}
+
+#hero .hero-caption-label {
+  display: block;
+  font-size: 0.8rem;
+  letter-spacing: 0.14em;
+  text-transform: uppercase;
+  color: #b5efda;
+}
+
+#hero .hero-caption-text {
+  display: block;
+  margin-top: 0.6rem;
+  font-family: var(--th-font-display);
+  font-size: 1.75rem;
+  line-height: 1.3;
+  color: var(--th-text);
+}
+
+#hero .hero-tag {
+  position: absolute;
+  top: 1.25rem;
+  right: 1.25rem;
+  padding: 0.75rem 1rem;
+  border: 1px solid rgb(255 255 255 / 0.19);
+  border-radius: 8px;
+  background: rgb(13 13 26 / 0.8);
+  backdrop-filter: blur(12px);
+  font-size: 0.7rem;
+  letter-spacing: 0.1em;
+  text-transform: uppercase;
+  text-align: center;
+  color: var(--th-text-soft);
+}
+
+#hero .hero-tag b {
+  display: block;
+  margin-top: 0.25rem;
+  font-family: var(--th-font-display);
+  font-size: 2rem;
+  line-height: 1.1;
+  letter-spacing: 0;
+  color: var(--hero-mint);
+}
+
+/* ---------- Tablet ---------- */
+@media (max-width: 1100px) {
+  #hero .hero-grid { gap: 2rem; }
+}
+
+/* ---------- Mobil: Text zuerst, Bild darunter ---------- */
+@media (max-width: 760px) {
+  #hero {
+    min-height: 0;
+    padding-block: 2rem 3rem;
+  }
+
+  #hero .hero-grid {
+    grid-template-columns: 1fr;
+    gap: 2rem;
+  }
+
+  #hero .hero-kicker { font-size: 0.875rem; }
+  #hero .hero-headline { margin-top: 1rem; font-size: clamp(2.3rem, 10vw, 3.2rem); }
+  #hero .hero-intro { margin-top: 1rem; font-size: 1.125rem; }
+  #hero .hero-actions { margin-top: 1.5rem; gap: 1.25rem; }
+  #hero .hero-visual { height: 340px; }
+  #hero figcaption { left: 1.25rem; bottom: 1.25rem; }
+  #hero .hero-caption-text { font-size: 1.4rem; }
+}
+
+@media (max-width: 390px) {
+  #hero .hero-button { width: 100%; justify-content: space-between; }
 }
diff --git a/ernaehrungsberatung.html b/ernaehrungsberatung.html
index 40c8156..9a3a3e3 100644
--- a/ernaehrungsberatung.html
+++ b/ernaehrungsberatung.html
@@ -37,7 +37,39 @@
          Branch: feature/US01-01-hero  ·  Styles: css/sections/hero.css
          Nur innerhalb dieser <section> arbeiten. -->
     <section id="hero" aria-labelledby="hero-title">
-      <!-- US01-01: Inhalt hier einfügen -->
+      <div class="container hero-grid">
+
+        <div class="hero-copy">
+          <h1 id="hero-title">
+            <span class="hero-kicker"><span class="hero-line" aria-hidden="true"></span>Ernährungsberatung für Triathlon ab&nbsp;50</span>
+            <span class="hero-headline">Gut versorgt.<br>Für alles, was<br><em>noch vor dir liegt.</em></span>
+          </h1>
+
+          <p class="hero-intro">
+            Dein nächstes Ziel beginnt auch auf dem Teller. Finde eine Ernährung,
+            die zu deinem Training, deinem Körper und deinem Leben passt.
+          </p>
+
+          <div class="hero-actions">
+            <a class="hero-button" href="#vorteile">Mehr erfahren <span aria-hidden="true">↓</span></a>
+            <a class="hero-link" href="#ablauf">So funktioniert’s <span aria-hidden="true">→</span></a>
+          </div>
+
+          <p class="hero-note"><span aria-hidden="true">✓</span> Persönlich. Alltagstauglich. Auf Augenhöhe.</p>
+        </div>
+
+        <figure class="hero-visual">
+          <img src="assets/images/hero/hero.webp" width="1200" height="800"
+               alt="Zwei sportlich aktive Menschen ab 50 besprechen einen Plan neben einem Fahrrad am See"
+               fetchpriority="high">
+          <figcaption>
+            <span class="hero-caption-label">Dein Tempo. Deine Ziele.</span>
+            <span class="hero-caption-text">Mehr Freude am Sport.<br>Mehr Energie fürs Leben.</span>
+          </figcaption>
+          <div class="hero-tag" aria-hidden="true">Triathlon <b>50+</b></div>
+        </figure>
+
+      </div>
     </section>
     <!-- ========== /US01-01 ========== -->