公告用户前端以及管理员

Change-Id: I3ea4a7f62ae91ef97734d6d673cce28855d10eeb
diff --git a/src/components/ActivityBoard.css b/src/components/ActivityBoard.css
new file mode 100644
index 0000000..7cb11d7
--- /dev/null
+++ b/src/components/ActivityBoard.css
@@ -0,0 +1,38 @@
+/* src/components/ActivityBoard.css */
+
+.activity-card {
+    border-radius: 12px;
+    overflow: hidden;
+    transition: all 0.3s ease;
+}
+
+.activity-card:hover {
+    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
+    transform: translateY(-4px);
+}
+
+.activity-photo {
+    height: 180px;
+    width: 100%;
+    object-fit: cover;
+    border-radius: 8px 8px 0 0;
+    transition: transform 0.2s ease;
+    cursor: pointer;
+}
+
+.activity-photo:hover {
+    transform: scale(1.03);
+}
+
+.activity-title {
+    font-weight: 600;
+    font-size: 16px;
+    margin: 8px 0;
+    color: #1a1a1a;
+}
+
+.loading-container {
+    display: flex;
+    justify-content: center;
+    padding: 50px 0;
+}
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