diff --git a/src/components/forms.rs b/src/components/forms.rs
index 1d554b7..e3343eb 100644
--- a/src/components/forms.rs
+++ b/src/components/forms.rs
@@ -10,6 +10,71 @@ pub const INPUT_CLASS: &str = "w-full px-4 py-2 border border-paper-border round
 /// 主按钮 CSS 类，用于表单提交等主操作按钮。
 pub const BUTTON_PRIMARY_CLASS: &str = "w-full py-2.5 px-4 bg-paper-accent text-white font-medium rounded-full hover:brightness-110 active:scale-[0.98] transition-all duration-200 cursor-pointer";
 
+/// 下拉选择框组件（自定义 chevron，跨浏览器对齐一致）。
+///
+/// 原生 `<select>` 的默认箭头由各浏览器自行绘制，在深色主题与圆角样式下
+/// 位置/颜色不协调（无法垂直居中、无法跟随主题色），故用 `appearance-none`
+/// 隐藏后叠一个 `top-1/2 -translate-y-1/2` 垂直居中的 chevron SVG
+/// （`pointer-events-none`，点击穿透到 select）。
+///
+/// 泛型值绑定：`<option>` 的 value 内部用序号占位，`onchange` 直接回传选中
+/// 项的 `T`，调用方无需做「字符串反查枚举」的样板代码。
+///
+/// Props：
+/// - `id`：select 元素 id，用于与 label 关联
+/// - `value`：当前选中项（受控）
+/// - `options`：可选项 `(值, 标签)` 列表
+/// - `onchange`：选中变化回调，回传新选中项的值
+#[component]
+pub fn FormSelect<T: Clone + PartialEq + 'static>(
+    id: Option<String>,
+    value: T,
+    options: Vec<(T, &'static str)>,
+    onchange: EventHandler<T>,
+) -> Element {
+    // 与 INPUT_CLASS 同族，但隐藏原生箭头（appearance-none），
+    // 右侧预留 pr-10 空间给自定义 chevron。定义在函数体内：当前仅 wasm 端
+    // 后台页面使用本组件，模块级常量在 server 构建下会触发 dead_code。
+    const SELECT_CLASS: &str = "w-full appearance-none cursor-pointer truncate pl-4 pr-10 py-2 border border-paper-border rounded-2xl bg-paper-entry text-paper-primary focus:outline-none focus:border-paper-accent focus:ring-1 focus:ring-paper-accent/30 transition-colors duration-200";
+
+    // 受控选中序号；value 不在 options 时兜底 0（与浏览器默认选中第一项一致）。
+    let selected = options.iter().position(|(v, _)| *v == value).unwrap_or(0);
+    // onchange 闭包与下方 for 循环各需一份 options（序号 → 值回查 / 渲染）。
+    let options_for_change = options.clone();
+    rsx! {
+        div { class: "relative",
+            select {
+                id: id.unwrap_or_default(),
+                class: "{SELECT_CLASS}",
+                value: "{selected}",
+                onchange: move |e| {
+                    if let Ok(i) = e.value().parse::<usize>() {
+                        if let Some((v, _)) = options_for_change.get(i) {
+                            onchange.call(v.clone());
+                        }
+                    }
+                },
+                for (i, (_, option_label)) in options.iter().enumerate() {
+                    option { value: "{i}", selected: i == selected, "{option_label}" }
+                }
+            }
+            // 自定义下拉箭头（替代原生箭头，保证垂直居中 + 跟随主题色）
+            svg {
+                class: "pointer-events-none absolute right-4 top-1/2 -translate-y-1/2 w-4 h-4 text-paper-secondary",
+                view_box: "0 0 24 24",
+                fill: "none",
+                stroke: "currentColor",
+                stroke_width: "2",
+                path {
+                    stroke_linecap: "round",
+                    stroke_linejoin: "round",
+                    d: "M6 9l6 6 6-6",
+                }
+            }
+        }
+    }
+}
+
 /// 表单输入框组件。
 ///
 /// Props：
diff --git a/src/pages/admin/mcp.rs b/src/pages/admin/mcp.rs
index b69355a..2efe292 100644
--- a/src/pages/admin/mcp.rs
+++ b/src/pages/admin/mcp.rs
@@ -21,7 +21,7 @@ use crate::api::mcp_tokens::{
     McpClientConfigs, TokenLifetime,
 };
 #[cfg(target_arch = "wasm32")]
-use crate::components::forms::INPUT_CLASS;
+use crate::components::forms::{FormSelect, INPUT_CLASS};
 #[cfg(target_arch = "wasm32")]
 use crate::components::ui::{
     ADMIN_CARD_CLASS, ADMIN_TABLE_CLASS, BADGE_BASE, BTN_PRIMARY, BTN_PRIMARY_SM, BTN_TEXT_RED,
@@ -386,39 +386,19 @@ fn CreateTokenCard() -> Element {
                 // 作用域
                 div { class: "flex flex-col gap-2",
                     label { class: "text-sm font-medium text-[var(--color-paper-secondary)]", "作用域" }
-                    select {
-                        class: "{INPUT_CLASS}",
-                        onchange: move |e| {
-                            if let Some(s) = SCOPE_OPTIONS
-                                .iter()
-                                .find(|(_, label)| *label == e.value().as_str())
-                                .map(|(s, _)| *s)
-                            {
-                                scope.set(s);
-                            }
-                        },
-                        for (s, label) in SCOPE_OPTIONS {
-                            option { value: "{label}", selected: *s == scope(), "{label}" }
-                        }
+                    FormSelect {
+                        value: scope(),
+                        options: SCOPE_OPTIONS.to_vec(),
+                        onchange: move |s| scope.set(s),
                     }
                 }
                 // 有效期
                 div { class: "flex flex-col gap-2",
                     label { class: "text-sm font-medium text-[var(--color-paper-secondary)]", "有效期" }
-                    select {
-                        class: "{INPUT_CLASS}",
-                        onchange: move |e| {
-                            if let Some(l) = LIFETIME_OPTIONS
-                                .iter()
-                                .find(|(_, label)| *label == e.value().as_str())
-                                .map(|(l, _)| *l)
-                            {
-                                lifetime.set(l);
-                            }
-                        },
-                        for (l, label) in LIFETIME_OPTIONS {
-                            option { value: "{label}", selected: *l == lifetime(), "{label}" }
-                        }
+                    FormSelect {
+                        value: lifetime(),
+                        options: LIFETIME_OPTIONS.to_vec(),
+                        onchange: move |l| lifetime.set(l),
                     }
                 }
             }