style(user-center): 优化手机号脱敏数字框与前缀后缀一体呈现

assets/css/routes/user-center/settings.css

@@ -716,38 +716,52 @@
 .aksrt-settings-modal .code-send-btn.is-counting { pointer-events: none; opacity: .6; }
 .aksrt-settings-modal .aksrt-captcha-wrap { margin: 12px 0 8px; }
 
-/* 修改手机：脱敏中间位数字框 */
+/* 修改手机：脱敏中间位数字框，与前缀/后缀号码一体呈现 */
 .aksrt-settings-modal .aksrt-phone-digits {
   display: flex;
+  align-items: center;
   justify-content: center;
-  gap: 10px;
-  margin-bottom: 10px;
+  gap: 6px;
+  margin-bottom: 12px;
+}
+
+.aksrt-settings-modal .aksrt-phone-digit__edge {
+  padding: 0 2px;
+  color: var(--color-ink, #333);
+  font-size: 22px;
+  font-weight: 600;
+  line-height: 1;
+  letter-spacing: 1px;
+  white-space: nowrap;
 }
 
 .aksrt-settings-modal .aksrt-phone-digit {
-  width: 48px;
-  height: 52px;
+  width: 44px;
+  height: 50px;
   padding: 0;
-  border: 1px solid var(--color-line-soft, rgba(0, 0, 0, 0.12));
-  border-radius: 8px;
-  background: transparent;
+  border: 1.5px solid var(--muted-3-color, #c9d1d9);
+  border-radius: 10px;
+  background-color: var(--main-bg-color, #f7f8fa);
   color: var(--color-ink, #333);
   font-size: 22px;
   font-weight: 600;
   line-height: 1;
   text-align: center;
   caret-color: var(--color-primary, #2a7de1);
+  font-variant-numeric: tabular-nums;
   outline: none;
-  transition: border-color .15s ease, box-shadow .15s ease;
+  transition: border-color .15s ease, background-color .15s ease, box-shadow .15s ease;
 }
 
 .aksrt-settings-modal .aksrt-phone-digit:focus {
   border-color: var(--color-primary, #2a7de1);
-  box-shadow: 0 0 0 3px rgba(42, 125, 225, 0.15);
+  background-color: var(--main-bg-color, #fff);
+  box-shadow: 0 0 0 3px rgba(42, 125, 225, 0.18);
 }
 
 .aksrt-settings-modal .aksrt-phone-digits.has-error .aksrt-phone-digit {
   border-color: var(--color-danger, #e02020);
+  background-color: rgba(224, 32, 32, 0.06);
   box-shadow: 0 0 0 3px rgba(224, 32, 32, 0.12);
 }