style(cycle-selection): 调整周期选择弹窗样式和布局

- 将周期说明移动到内容区域并添加样式
- 优化样式结构，减少嵌套层级
- 移除scoped限制使样式全局可用

@@ -4,9 +4,9 @@
       <div class="cycle-popup">
         <div class="popup-header">
           <h3>选择周期</h3>
-          <p>{{ cycle_note }}</p>
         </div>
         <div class="popup-content">
+          <p style="padding-top: 0.85rem; text-align: justify;">{{ cycle_note }}</p>
           <van-radio-group v-model="selectedCycle">
             <div v-for="cycle in cycleList" :key="cycle.id" class="cycle-item">
               <van-radio :name="cycle.id">
@@ -259,7 +259,7 @@ onUnmounted(() => {
 });
 </script>
 
-<style lang="less" scoped>
+<style lang="less">
 .cycle-selection-page {
   width: 100vw;
   height: 100vh;
@@ -267,9 +267,7 @@ onUnmounted(() => {
   display: flex;
   align-items: center;
   justify-content: center;
-}
-
-.cycle-popup {
+  .cycle-popup {
     width: 85vw;
     height: 70vh;
     background: white;
@@ -279,9 +277,9 @@ onUnmounted(() => {
     overflow: hidden;
     position: relative;
     margin: 0 auto;
-}
+  }
 
-.popup-header {
+  .popup-header {
     padding: 20px;
     text-align: center;
     border-bottom: 1px solid #eee;
@@ -293,36 +291,36 @@ onUnmounted(() => {
       font-weight: 600;
       color: #333;
     }
-}
+  }
 
-.popup-content {
+  .popup-content {
     flex: 1;
     overflow-y: auto;
     padding: 0 20px;
     min-height: 0;
-}
+  }
 
-.cycle-item {
+  .cycle-item {
     padding: 15px 0;
     border-bottom: 1px solid #f5f5f5;
 
     &:last-child {
       border-bottom: none;
     }
-}
+  }
 
-.cycle-info {
+  .cycle-info {
     margin-left: 10px;
-}
+  }
 
-.cycle-title {
+  .cycle-title {
     font-size: 16px;
     font-weight: 500;
     color: #333;
     margin-bottom: 8px;
-}
+  }
 
-.cycle-time {
+  .cycle-time {
     font-size: 14px;
     color: #666;
     line-height: 1.5;
@@ -334,19 +332,21 @@ onUnmounted(() => {
         margin-bottom: 0;
       }
     }
-}
+  }
 
-.popup-footer {
+  .popup-footer {
     padding: 20px;
     border-top: 1px solid #eee;
     flex-shrink: 0;
-}
+  }
 
-.confirm-btn {
+  .confirm-btn {
     width: 100%;
     height: 44px;
     border-radius: 8px;
     font-size: 16px;
     font-weight: 500;
+  }
 }
+
 </style>