style: 增加移动端弹窗全局适配

src/assets/main.css

@@ -56,6 +56,46 @@ a:hover {
   }
 }
 
+/* 移动端弹窗适配：覆盖 Element Plus 内联宽度并约束 footer */
+@media (max-width: 768px) {
+  .el-dialog {
+    --el-dialog-width: calc(100% - 24px) !important;
+    --el-dialog-margin-top: 5vh;
+    max-height: calc(100vh - 60px);
+  }
+
+  .el-dialog__body {
+    max-height: calc(100vh - 200px);
+    overflow-y: auto;
+  }
+
+  .el-dialog__footer {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 8px;
+  }
+
+  .el-dialog__footer .el-button {
+    flex: 1;
+    margin-left: 0;
+  }
+
+  .el-message-box {
+    max-width: calc(100% - 24px);
+  }
+
+  .el-message-box__btns {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 8px;
+  }
+
+  .el-message-box__btns .el-button {
+    flex: 1;
+    margin-left: 0;
+  }
+}
+
 .fade-up-enter-active,
 .fade-up-leave-active {
   transition: opacity 0.22s ease, transform 0.22s ease;