fix(mini): OPC认证输入框溢出+全面隐藏所有滚动条

- cert-apply: .input和.ca-textarea加box-sizing:border-box，修复width:100%+padding溢出卡片
- 全局滚动条隐藏：用*通配符全面覆盖所有元素
  - * { scrollbar-width:none; -ms-overflow-style:none; }
  - *::-webkit-scrollbar { display:none !important; width:0; height:0; }
- 覆盖所有横向滚动容器（overflow-x:auto）和页面级滚动

miniprogram/src/app.scss

@@ -25,15 +25,17 @@ page {
 }
 
 /* 隐藏滚动条：所有页面内容可滚动，但不显示滚动条（含内部横向滚动容器） */
-page::-webkit-scrollbar,
-::-webkit-scrollbar {
-  display: none;
-  width: 0;
-  height: 0;
+* {
+  scrollbar-width: none;
+  -ms-overflow-style: none;
+}
+*::-webkit-scrollbar {
+  display: none !important;
+  width: 0 !important;
+  height: 0 !important;
   -webkit-appearance: none;
 }
 page { -ms-overflow-style: none; scrollbar-width: none; }
-.ev-tabs, .phase-filters, .quiz-body, .sv-opts, .ot-opts { scrollbar-width: none; }
 
 /* 页面切换淡入：挂到各页面根容器，切换时淡入，缓解硬切/一瞬空白 */
 .page-in {

miniprogram/src/pages-extra/cert-apply/index.scss

@@ -18,11 +18,11 @@
 .field { margin-top: 12rpx; }
 .input {
   background: rgba(255,255,255,0.55); backdrop-filter: blur(20px) saturate(160%); -webkit-backdrop-filter: blur(20px) saturate(160%); border: 1rpx solid #d7ddf0; border-radius: 10rpx;
-  color: #3a4672; padding: 14rpx 16rpx; font-size: 27rpx; width: 100%;
+  color: #3a4672; padding: 14rpx 16rpx; font-size: 27rpx; width: 100%; box-sizing: border-box;
 }
 .ca-textarea {
   width: 100%; min-height: 140rpx; background: rgba(255,255,255,0.55); backdrop-filter: blur(20px) saturate(160%); -webkit-backdrop-filter: blur(20px) saturate(160%); border: 1rpx solid #d7ddf0;
-  border-radius: 10rpx; color: #3a4672; padding: 14rpx 16rpx; font-size: 27rpx;
+  border-radius: 10rpx; color: #3a4672; padding: 14rpx 16rpx; font-size: 27rpx; box-sizing: border-box;
 }
 .ca-doc { display: flex; align-items: center; gap: 16rpx; margin-top: 12rpx; }
 .ca-uploaded { font-size: 23rpx; color: #9aa4c6; flex: 1; }