fix(vitrine): hero desktop en 2 colonnes, moins « téléphone ».

static/css/style.css

@@ -25,7 +25,7 @@
     --font-body: "Source Serif 4", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
     --font-ui: "Segoe UI", "Helvetica Neue", sans-serif;
     --header-h: 3.75rem;
-    --max: 68rem;
+    --max: 72rem;
     --ease: cubic-bezier(0.22, 1, 0.36, 1);
 }
 
@@ -161,9 +161,15 @@ body {
 .site-main { min-height: 60vh; }
 
 .page-shell {
-    max-width: 44rem;
+    max-width: min(52rem, 92vw);
     margin: 0 auto;
-    padding: 2.5rem 1.25rem 4rem;
+    padding: 2.5rem 1.5rem 4rem;
+}
+@media (min-width: 64rem) {
+    .page-shell {
+        max-width: min(58rem, 88vw);
+        padding: 3rem 2rem 5rem;
+    }
 }
 .page-shell .content {
     background: var(--surface);
@@ -223,31 +229,40 @@ body {
     text-decoration: underline;
 }
 
-/* Hero */
+/* Hero — desktop large (2 colonnes), mobile compact */
 .hero {
     position: relative;
     min-height: calc(100vh - var(--header-h));
     min-height: calc(100dvh - var(--header-h));
     display: flex;
+    flex-direction: column;
     align-items: center;
     justify-content: center;
     overflow: hidden;
-    padding: 2rem 1.25rem 4rem;
+    padding: 2rem 1.25rem 5rem;
 }
 .hero__bg {
     position: absolute;
     inset: 0;
-    background: linear-gradient(180deg, rgba(247,241,232,0.55) 0%, rgba(247,241,232,0.2) 40%, rgba(174,225,205,0.25) 100%);
+    background: linear-gradient(180deg, rgba(247,241,232,0.55) 0%, rgba(247,241,232,0.15) 45%, rgba(174,225,205,0.28) 100%);
     pointer-events: none;
 }
+.hero__copy {
+    position: relative;
+    z-index: 1;
+    text-align: center;
+    width: min(52rem, 92vw);
+    animation: heroIn 0.8s var(--ease) both;
+}
 .hero__river {
     position: absolute;
     left: 50%;
-    bottom: -2%;
-    width: min(110vw, 56rem);
+    bottom: -4%;
+    width: min(120vw, 72rem);
     transform: translateX(-50%);
-    opacity: 0.92;
+    opacity: 0.95;
     pointer-events: none;
+    z-index: 0;
     animation: riverIn 1.1s var(--ease) both;
 }
 .hero__river img {
@@ -258,14 +273,7 @@ body {
 }
 @keyframes riverIn {
     from { opacity: 0; transform: translateX(-50%) translateY(1.5rem); }
-    to { opacity: 0.92; transform: translateX(-50%) translateY(0); }
-}
-.hero__inner {
-    position: relative;
-    z-index: 1;
-    text-align: center;
-    max-width: 36rem;
-    animation: heroIn 0.8s var(--ease) both;
+    to { opacity: 0.95; transform: translateX(-50%) translateY(0); }
 }
 @keyframes heroIn {
     from { opacity: 0; transform: translateY(0.75rem); }
@@ -273,47 +281,94 @@ body {
 }
 .hero__brand {
     font-family: var(--font-brand);
-    font-size: clamp(2.2rem, 1.6rem + 3vw, 3.5rem);
+    font-size: clamp(2.4rem, 1.5rem + 3.5vw, 4.25rem);
     font-weight: 700;
-    margin: 0 0 0.75rem;
+    margin: 0 0 0.85rem;
     letter-spacing: -0.03em;
     color: var(--ink);
 }
 .hero__title {
     font-family: var(--font-brand);
-    font-size: clamp(1.35rem, 1.1rem + 1.2vw, 1.85rem);
+    font-size: clamp(1.45rem, 1.1rem + 1.8vw, 2.35rem);
     font-weight: 600;
-    line-height: 1.25;
-    margin: 0 0 0.75rem;
+    line-height: 1.22;
+    margin: 0 auto 0.85rem;
+    max-width: 28ch;
 }
 .hero__tagline {
-    margin: 0 0 1.5rem;
+    margin: 0 auto 1.75rem;
     color: var(--ink-soft);
-    font-size: 1.05rem;
+    font-size: clamp(1.05rem, 0.95rem + 0.4vw, 1.25rem);
     line-height: 1.45;
+    max-width: 38rem;
 }
 .hero__actions {
     display: flex;
     flex-wrap: wrap;
-    gap: 0.75rem;
+    gap: 0.75rem 1rem;
     justify-content: center;
     margin: 0;
 }
 
+@media (min-width: 64rem) {
+    .hero {
+        display: grid;
+        grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
+        align-items: center;
+        column-gap: 3rem;
+        max-width: var(--max);
+        margin: 0 auto;
+        width: 100%;
+        padding: 3.5rem 2.5rem 4rem;
+        box-sizing: border-box;
+    }
+    .hero__bg { border-radius: 0; }
+    .hero__copy {
+        width: auto;
+        max-width: none;
+        text-align: left;
+        justify-self: stretch;
+    }
+    .hero__title {
+        margin: 0 0 0.85rem;
+        max-width: none;
+        font-size: clamp(2rem, 1.5rem + 1.2vw, 2.85rem);
+    }
+    .hero__tagline {
+        margin: 0 0 1.5rem;
+        max-width: 36rem;
+    }
+    .hero__actions { justify-content: flex-start; }
+    .hero__river {
+        position: relative;
+        left: auto;
+        bottom: auto;
+        width: 100%;
+        max-width: 34rem;
+        transform: none;
+        justify-self: end;
+        animation: riverInDesk 1.1s var(--ease) both;
+    }
+    @keyframes riverInDesk {
+        from { opacity: 0; transform: translateX(1.25rem); }
+        to { opacity: 0.95; transform: none; }
+    }
+}
+
 @media (max-width: 40rem) {
     .hero {
         min-height: auto;
-        padding: 1.75rem 1.1rem 3rem;
+        padding: 1.75rem 1.1rem 3.5rem;
         align-items: flex-start;
-        padding-top: 2rem;
     }
+    .hero__copy { width: 100%; }
     .hero__river {
         width: 130vw;
         bottom: -8%;
         opacity: 0.75;
     }
     .hero__brand { font-size: 2rem; }
-    .hero__title { font-size: 1.25rem; }
+    .hero__title { font-size: 1.25rem; max-width: none; }
     .hero__tagline { font-size: 0.98rem; margin-bottom: 1.25rem; }
 }
 
@@ -346,11 +401,18 @@ body {
     padding: 0;
     display: grid;
     grid-template-columns: repeat(3, 1fr);
-    gap: 1.25rem;
+    gap: 1.5rem;
 }
 @media (max-width: 52rem) {
     .exp-grid { grid-template-columns: 1fr; }
 }
+@media (min-width: 64rem) {
+    .experiences .section__inner,
+    .confiance .section__inner {
+        max-width: var(--max);
+    }
+    .exp-card { padding: 1.75rem 1.6rem; min-height: 12rem; }
+}
 .exp-card {
     background: var(--surface);
     border-radius: 1.25rem;