- 图标优化、视频缩略图

src/styles/admin.css

@@ -696,6 +696,46 @@ button { font-family: "Poppins", "PingFang SC", sans-serif; cursor: pointer; tra
   display: block;
   cursor: pointer;
 }
+.thumb-video-wrap {
+  position: relative;
+  width: 100%;
+  height: 108px;
+  overflow: hidden;
+  cursor: pointer;
+  background: #111;
+}
+.thumb-video-wrap .thumb {
+  width: 100%;
+  height: 100%;
+  object-fit: cover;
+  display: block;
+  background: #111;
+}
+.play-badge {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  width: 36px;
+  height: 36px;
+  border-radius: 50%;
+  background: rgba(0,0,0,0.55);
+  color: rgba(255,255,255,0.85);
+  font-size: 14px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  backdrop-filter: blur(4px);
+  border: 1.5px solid rgba(255,255,255,0.15);
+  transition: all 0.2s ease;
+  pointer-events: none;
+}
+.thumb-video-wrap:hover .play-badge {
+  background: rgba(0, 189, 125, 0.75);
+  color: #fff;
+  transform: translate(-50%, -50%) scale(1.1);
+  border-color: rgba(255,255,255,0.3);
+}
 .media-card .thumb-placeholder {
   width: 100%;
   height: 108px;
@@ -926,6 +966,7 @@ button { font-family: "Poppins", "PingFang SC", sans-serif; cursor: pointer; tra
   .form-inline { flex-direction: column; gap: var(--space-16); }
   .media-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-8); }
   .media-card .thumb { height: 88px; }
+  .thumb-video-wrap { height: 88px; }
   .media-card .body { padding: var(--space-8); }
   .media-card .body .name { font-size: 12px; }
   .media-card .body .actions button { font-size: 11px; padding: var(--space-4) var(--space-8); }