fix:修改首页的动画

.cursor/rules/ui-and-sections.mdc

@@ -10,6 +10,7 @@ alwaysApply: false
 
 - `hero`～`system`：`.poetic-section`（宣纸/国风：`--paper`、`--ink`、`--red`、`--gold`）
 - `tech`～`contact`：`.tech-section`（深色科技：`--tech`、`--tech-card`、`--tech-line`）
+- 普通模式 `activeIndex >= tech` 时顶栏加 `is-tech-theme`；展控（`?mode=stage`）不加
 - 新增章节必须选对主题族；勿混用两套配色令牌
 
 ## 改章节

src/App.css

@@ -65,6 +65,36 @@ a {
   box-shadow: 0 1.125rem 4.375rem rgba(83, 42, 18, 0.14);
   backdrop-filter: blur(1rem);
   transform: translateX(-50%);
+  transition: background 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
+}
+
+.topbar.is-tech-theme {
+  border-color: rgba(201, 154, 69, 0.28);
+  background: rgba(8, 9, 15, 0.78);
+  box-shadow: 0 1.125rem 4.375rem rgba(0, 0, 0, 0.35);
+}
+
+.topbar.is-tech-theme .brand-lockup strong,
+.topbar.is-tech-theme .brand-lockup small {
+  color: #fff4df;
+  transition: color 0.35s ease;
+}
+
+.topbar.is-tech-theme .nav-links {
+  color: rgba(241, 217, 154, 0.82);
+  transition: color 0.35s ease;
+}
+
+.topbar.is-tech-theme .nav-links a:hover,
+.topbar.is-tech-theme .nav-cta:hover {
+  color: var(--gold-light);
+}
+
+.topbar.is-tech-theme .nav-cta {
+  border-color: rgba(201, 154, 69, 0.42);
+  color: var(--gold-light);
+  background: rgba(255, 244, 223, 0.06);
+  transition: color 0.35s ease, border-color 0.35s ease, background 0.35s ease, transform 0.2s ease;
 }
 
 .brand-lockup {
@@ -930,7 +960,6 @@ blockquote cite {
 .tech-grid article,
 .ports-grid article,
 .partner-list span,
-.qr-card,
 .stage-panel {
   border: 1px solid var(--tech-line);
   background: var(--tech-card);
@@ -1152,15 +1181,35 @@ blockquote cite {
 .qr-card {
   display: grid;
   justify-items: center;
-  gap: 1rem;
-  padding: 1.75rem;
+  align-self: center;
+  gap: 1.35rem;
+  margin-block: 1.75rem;
+  padding: 3.75rem 1.75rem 3.5rem;
+  border: 1px solid rgba(201, 154, 69, 0.2);
+  border-radius: 1.25rem;
+  background: rgba(255, 255, 255, 0.045);
+  box-shadow: inset 0 1px 0 rgba(255, 244, 223, 0.06);
+  backdrop-filter: blur(1.125rem);
 }
 
 .qr-card img {
-  width: 15rem;
-  height: 15rem;
-  border-radius: 1.125rem;
+  width: 14.5rem;
+  height: 14.5rem;
+  padding: 0.65rem;
+  border-radius: 0.75rem;
   background: #fff;
+  box-sizing: border-box;
+  object-fit: contain;
+}
+
+.qr-card span {
+  max-width: 13.5rem;
+  margin: 0;
+  color: rgba(255, 244, 223, 0.72);
+  font-size: 0.8125rem;
+  letter-spacing: 0.08em;
+  line-height: 1.6;
+  text-align: center;
 }
 
 .footer {
@@ -1822,8 +1871,8 @@ blockquote cite {
   bottom: 3.625rem;
 }
 @keyframes floatBottle {
-  0%, 100% { transform: translateY(0); }
-  50% { transform: translateY(-0.75rem); }
+  0%, 100% { transform: translateY(0) rotate(-10deg); }
+  50% { transform: translateY(-2rem) rotate(0deg); }
 }
 
 @media (max-width: 1100px) {
@@ -2113,13 +2162,20 @@ blockquote cite {
 }
 
 .qr-card {
-  padding: 0.75rem !important;
-  gap: 0.5rem !important;
+  margin-block: clamp(0.75rem, 2vh, 1.5rem) !important;
+  padding: 2.25rem 0.9rem 2.1rem !important;
+  gap: 0.85rem !important;
 }
 
 .qr-card img {
   width: min(28vh, 11rem) !important;
   height: min(28vh, 11rem) !important;
+  padding: 0.45rem !important;
+}
+
+.qr-card span {
+  font-size: clamp(0.7rem, 1.2vh, 0.8125rem) !important;
+  line-height: 1.5 !important;
 }
 
 .contact-person strong {

src/App.tsx

@@ -223,10 +223,12 @@ function App() {
   }, [autoPlay, isStageMode])
 
   const progress = ((activeIndex + 1) / sections.length) * 100
+  const techSectionIndex = sections.findIndex((s) => s.id === 'tech')
+  const isTechTopbar = !isStageMode && techSectionIndex >= 0 && activeIndex >= techSectionIndex
 
   return (
     <div className={isStageMode ? 'site is-stage' : 'site'}>
-      <header className="topbar">
+      <header className={isTechTopbar ? 'topbar is-tech-theme' : 'topbar'}>
         <a className="brand-lockup" href="#hero" onClick={() => goToSection(0)}>
           <img className="haoke-logo-img" src="/assets/haoke-logo.png" alt="杜康好客" />
           <span>