添加银行后端接口，前端代码

bank-frontend/src/styles/global.css

@@ -9,6 +9,189 @@
   box-sizing: border-box;
 }
 
+/* 强制重置所有元素的默认样式 */
+*,
+*::before,
+*::after {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+/* 确保body和html没有默认空白 */
+html {
+  margin: 0 !important;
+  padding: 0 !important;
+  width: 100% !important;
+  height: 100% !important;
+  overflow-x: hidden !important;
+  box-sizing: border-box !important;
+  font-size: 14px !important;
+  line-height: 1.5715 !important;
+}
+
+body {
+  margin: 0 !important;
+  padding: 0 !important;
+  width: 100% !important;
+  height: 100% !important;
+  overflow-x: hidden !important;
+  box-sizing: border-box !important;
+  position: relative !important;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif !important;
+  color: #262626 !important;
+  background-color: #f0f2f5 !important;
+}
+
+/* 确保#app容器没有空白 */
+#app {
+  margin: 0 !important;
+  padding: 0 !important;
+  width: 100% !important;
+  height: 100% !important;
+  position: relative !important;
+}
+
+/* 强制修复Ant Design菜单空白问题 */
+.ant-menu,
+.ant-menu-root,
+.ant-menu-vertical,
+.ant-menu-inline {
+  padding: 0 !important;
+  margin: 0 !important;
+  background: transparent !important;
+}
+
+.ant-menu-item,
+.ant-menu-submenu-title {
+  margin: 0 !important;
+  padding: 0 16px !important;
+}
+
+.ant-menu-item:first-child,
+.ant-menu-submenu:first-child .ant-menu-submenu-title {
+  margin-top: 0 !important;
+  padding-top: 0 !important;
+}
+
+/* 确保侧边栏菜单从顶部开始 */
+.ant-layout-sider .ant-menu,
+.ant-layout-sider .ant-menu-root,
+.ant-layout-sider .ant-menu-vertical,
+.ant-layout-sider .ant-menu-inline {
+  padding: 0 !important;
+  margin: 0 !important;
+  background: transparent !important;
+}
+
+/* 强制移除菜单容器的所有空白 */
+.ant-menu > li:first-child {
+  margin-top: 0 !important;
+  padding-top: 0 !important;
+}
+
+.ant-menu .ant-menu-item:first-child {
+  margin-top: 0 !important;
+  padding-top: 0 !important;
+}
+
+/* 针对侧边栏的特殊处理 */
+.ant-layout-sider .ant-menu > li:first-child {
+  margin-top: 0 !important;
+  padding-top: 0 !important;
+}
+
+.ant-layout-sider .ant-menu .ant-menu-item:first-child {
+  margin-top: 0 !important;
+  padding-top: 0 !important;
+}
+
+/* 最终强制重置 - 确保没有任何空白 */
+.ant-layout-sider {
+  padding: 0 !important;
+  margin: 0 !important;
+  border: none !important;
+  background: #001529 !important;
+}
+
+.ant-layout-sider .ant-menu {
+  padding: 0 !important;
+  margin: 0 !important;
+  border: none !important;
+  background: transparent !important;
+  height: 100% !important;
+}
+
+.ant-layout-sider .ant-menu ul {
+  padding: 0 !important;
+  margin: 0 !important;
+  background: transparent !important;
+}
+
+.ant-layout-sider .ant-menu li {
+  margin: 0 !important;
+  padding: 0 !important;
+  background: transparent !important;
+}
+
+.ant-layout-sider .ant-menu li:first-child {
+  margin-top: 0 !important;
+  padding-top: 0 !important;
+  border-top: none !important;
+}
+
+/* 强制重置菜单项样式 */
+.ant-layout-sider .ant-menu-item {
+  margin: 0 !important;
+  padding: 0 16px !important;
+  height: 48px !important;
+  line-height: 48px !important;
+  border: none !important;
+}
+
+.ant-layout-sider .ant-menu-item:first-child {
+  margin-top: 0 !important;
+  padding-top: 0 !important;
+  border-top: none !important;
+}
+
+.ant-layout-sider .ant-menu-submenu-title {
+  margin: 0 !important;
+  padding: 0 16px !important;
+  height: 48px !important;
+  line-height: 48px !important;
+  border: none !important;
+}
+
+/* 确保头部完全显示 */
+.ant-layout-header {
+  padding: 0 !important;
+  margin: 0 !important;
+  line-height: 64px !important;
+  height: 64px !important;
+  position: fixed !important;
+  top: 0 !important;
+  left: 0 !important;
+  right: 0 !important;
+  z-index: 1001 !important;
+  width: 100vw !important;
+  box-sizing: border-box !important;
+}
+
+/* 强制重置所有可能的头部样式 */
+.ant-layout-header * {
+  box-sizing: border-box !important;
+}
+
+/* 确保头部内容不被截断 */
+.ant-layout-header .logo,
+.ant-layout-header .user-info {
+  line-height: 64px !important;
+  height: 64px !important;
+  display: flex !important;
+  align-items: center !important;
+}
+
 html, body {
   margin: 0;
   padding: 0;