diff --git a/static/style.css b/static/style.css
index c696204..104e2cd 100644
--- a/static/style.css
+++ b/static/style.css
@@ -503,6 +503,7 @@ a:hover {
    上传区域
    ================================ */
 .upload-zone {
+  display: block;
   border: 2px dashed var(--border-default);
   border-radius: var(--radius-xl);
   padding: var(--space-10);
@@ -510,16 +511,40 @@ a:hover {
   transition: all var(--duration-normal) var(--ease-default);
   cursor: pointer;
   background: var(--bg-secondary);
+  position: relative;
+  overflow: hidden;
+}
+
+.upload-zone::before {
+  content: '';
+  position: absolute;
+  inset: 0;
+  background: var(--primary-50);
+  opacity: 0;
+  transition: opacity var(--duration-normal) var(--ease-default);
+  pointer-events: none;
+}
+
+.upload-zone:hover {
+  border-color: var(--primary-400);
+}
+
+.upload-zone:hover::before {
+  opacity: 1;
 }
 
-.upload-zone:hover,
 .upload-zone.drag-over {
   border-color: var(--primary-400);
-  background: var(--primary-50);
+  transform: scale(1.01);
 }
 
-.upload-zone.drag-over {
-  transform: scale(1.02);
+.upload-zone.drag-over::before {
+  opacity: 1;
+}
+
+.upload-zone > * {
+  position: relative;
+  z-index: 1;
 }
 
 .upload-icon {