默认为无圆角，无阴影

web/src/App.vue

@@ -6,12 +6,17 @@ const requestCaptchaDataUrl = import.meta.env.VITE_REQUEST_CAPTCHA_URL
 const validCaptchaUrl = import.meta.env.VITE_VALID_CAPTCHA_URL
 
 //通过URL上的参数解析验证码组件的参数
-const { radius, shadow, locale, callback, extra } = (() => {
+const { radius, shadow, locale, callback, extra, style } = (() => {
     const url = new URL(location.href)
-    const radius = url.searchParams.get('radius') !== '0'
-    const shadow = url.searchParams.get('shadow') !== '0'
+    const radius = url.searchParams.get('radius') === '1'
+    const shadow = url.searchParams.get('shadow') === '1'
     const locale = url.searchParams.get('lang') ?? undefined
     const callback = url.searchParams.get('callback')
+    const bg = url.searchParams.get('bg')
+    const style: Record<string, any> = {}
+    if (bg) {
+        style.background = bg
+    }
 
     const extra = (() => {
         const json = url.searchParams.get('extra')
@@ -36,6 +41,7 @@ const { radius, shadow, locale, callback, extra } = (() => {
         locale,
         callback,
         extra,
+        style,
     }
 })()
 
@@ -61,6 +67,7 @@ const onSuccess = (id: string) => {
         :shadow="shadow"
         :locale="locale"
         :extra="extra"
+        :style="style"
         @success="onSuccess"
     />
 </template>