美化返回顶部图标样式

apps/jingrow/frontend/src/app/layouts/BackToTop.vue

@@ -7,23 +7,23 @@
       :title="t('Back to top')"
     >
       <!-- SVG 圆形进度条 -->
-      <svg class="progress-ring" viewBox="0 0 56 56">
+      <svg class="progress-ring" viewBox="0 0 48 48">
         <!-- 背景圆圈（灰色） -->
         <circle
           class="progress-ring-bg"
-          cx="28"
-          cy="28"
-          r="26"
+          cx="24"
+          cy="24"
+          r="23"
           fill="none"
-          stroke="#e5e7eb"
+          stroke="#d1d5db"
           stroke-width="2"
         />
         <!-- 进度圆圈（绿色） -->
         <circle
           class="progress-ring-progress"
-          cx="28"
-          cy="28"
-          r="26"
+          cx="24"
+          cy="24"
+          r="23"
           fill="none"
           stroke="#22c55e"
           stroke-width="2"
@@ -56,7 +56,7 @@ const scrollProgress = ref(0)
 const registeredContainers = ref<(Element | Window)[]>([])
 
 // SVG 圆形进度条的半径
-const radius = 26
+const radius = 23
 const circumference = computed(() => 2 * Math.PI * radius)
 
 // 进度条偏移量（用于显示进度）
@@ -240,8 +240,8 @@ onUnmounted(() => {
   right: 24px;
   bottom: 24px;
   z-index: 1000;
-  width: 56px;
-  height: 56px;
+  width: 48px;
+  height: 48px;
   background: white;
   border: 1px solid #e5e7eb;
   border-radius: 50%;
@@ -249,14 +249,13 @@ onUnmounted(() => {
   display: flex;
   align-items: center;
   justify-content: center;
-  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
   transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
 }
 
 .back-to-top-btn:hover {
   transform: translateY(-2px);
-  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
-  border-color: #22c55e;
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
 }
 
 .progress-ring {
@@ -266,14 +265,17 @@ onUnmounted(() => {
   width: 100%;
   height: 100%;
   transform: rotate(-90deg);
+  pointer-events: none;
 }
 
 .progress-ring-bg {
   transition: stroke 0.3s ease;
+  opacity: 1;
 }
 
 .progress-ring-progress {
   transition: stroke-dashoffset 0.1s linear;
+  opacity: 1;
 }
 
 .arrow-icon {
@@ -283,10 +285,6 @@ onUnmounted(() => {
   transition: color 0.3s ease;
 }
 
-.back-to-top-btn:hover .arrow-icon {
-  color: #16a34a;
-}
-
 /* 移动端调整位置 */
 @media (max-width: 768px) {
   .back-to-top-btn {