添加copyright

public/css/style.css

@@ -2695,4 +2695,72 @@ input:checked+.slider:before {
     color: var(--accent-indigo);
     background: rgba(99, 102, 241, 0.1);
     border-color: var(--accent-indigo);
+}
+
+/* ---- Footer ---- */
+.site-footer {
+  margin-top: 40px;
+  padding: 30px 28px;
+  border-top: 1px solid var(--border-color);
+  background: rgba(10, 14, 26, 0.4);
+  backdrop-filter: blur(10px);
+  position: relative;
+  z-index: 10;
+}
+
+:root.light-theme .site-footer {
+  background: rgba(255, 255, 255, 0.4);
+}
+
+.footer-content {
+  max-width: 1600px;
+  margin: 0 auto;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  flex-wrap: wrap;
+  gap: 20px;
+}
+
+.copyright {
+  font-size: 0.88rem;
+  color: var(--text-muted);
+  font-weight: 500;
+}
+
+.filings {
+  display: flex;
+  align-items: center;
+  gap: 20px;
+}
+
+.filings a {
+  font-size: 0.82rem;
+  color: var(--text-muted);
+  text-decoration: none;
+  transition: color 0.2s;
+  display: flex;
+  align-items: center;
+}
+
+.filings a:hover {
+  color: var(--accent-indigo);
+}
+
+@media (max-width: 768px) {
+  .site-footer {
+    padding: 24px 16px;
+    margin-top: 20px;
+  }
+  
+  .footer-content {
+    flex-direction: column;
+    text-align: center;
+    gap: 12px;
+  }
+  
+  .filings {
+    flex-direction: column;
+    gap: 8px;
+  }
 }