From 69d721055d5577610cc0f421e96145074d81d238 Mon Sep 17 00:00:00 2001
From: CNWei <t6g888@163.com>
Date: Mon, 2 Nov 2026 21:47:03 +0800
Subject: [PATCH] =?UTF-8?q?fix(frontend):=20=E8=A1=A5=E9=BD=90=E5=85=A8?=
 =?UTF-8?q?=E5=B1=80=E6=8C=89=E9=92=AE=20reset=EF=BC=8C=E4=BF=AE=E5=A4=8D?=
 =?UTF-8?q?=20Select=20=E9=80=89=E9=A1=B9=E7=81=B0=E5=BA=95?=
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组件库的 Select / Segmented / Tabs / Menu 都把按钮底色交给宿主 reset；之前 index.css 只设了 cursor，Chrome 默认的 ButtonFace 灰底和按钮边框就露了出来，下拉面板看起来像一块块灰条。
---
 frontend/src/index.css | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/frontend/src/index.css b/frontend/src/index.css
index 2e1958f..08e2cc9 100644
--- a/frontend/src/index.css
+++ b/frontend/src/index.css
@@ -71,7 +71,13 @@ textarea {
   font: inherit;
 }
 
+/* 组件库的「无底色按钮」依赖宿主这份 reset（Select 选项、Segmented、Tabs、Menu
+   都只声明选中态底色）。少了它，浏览器默认的 ButtonFace 灰底和按钮边框会露出来，
+   下拉选项会变成一块块灰条。 */
 button {
+  border: none;
+  background: none;
+  color: inherit;
   cursor: pointer;
 }