style(index): 更新首页样式和快速操作组件

- 更改页面背景渐变颜色
- 调整购买按钮背景渐变颜色
- 修改购物车图标背景渐变颜色
- 重构快速操作组件布局结构
- 更新快速操作图标尺寸和样式
- 移除快速操作标题和描述文字
- 简化快速操作组件渲染逻辑
- 添加图标颜色分类样式类

src/pages/index/QuickActions.scss

@@ -1,81 +1,50 @@
 .quick-actions {
-  margin: 16px 16px 0;
-  padding: 20px;
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  padding: 24px 16px;
   background: #ffffff;
-  border-radius: 16px;
-  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
-
-  &__header {
-    margin-bottom: 20px;
-  }
-
-  &__title {
-    font-size: 18px;
-    font-weight: 600;
-    color: #1a1a1a;
-  }
-
-  &__row {
-    display: flex;
-    flex-direction: row;
-    margin-bottom: 12px;
-
-    &:last-child {
-      margin-bottom: 0;
-    }
-  }
 
   &__item {
     flex: 1;
     display: flex;
     flex-direction: column;
     align-items: center;
-    padding: 20px 8px 16px;
-    background: #f6f8fc;
-    border-radius: 14px;
-    margin-right: 12px;
-
-    &:last-child {
-      margin-right: 0;
-    }
 
     &:active {
-      opacity: 0.8;
+      opacity: 0.7;
     }
   }
 
-  &__icon-box {
-    width: 52px;
-    height: 52px;
-    border-radius: 16px;
+  &__icon {
+    width: 48px;
+    height: 48px;
+    border-radius: 12px;
     display: flex;
     align-items: center;
     justify-content: center;
-    margin-bottom: 12px;
-    background: linear-gradient(135deg, #2563eb, #3b82f6);
+    margin-bottom: 8px;
 
-    &--light {
-      background: linear-gradient(135deg, #60a5fa, #93c5fd);
+    &--orange {
+      background: #ff8c1a;
     }
 
-    &--deep {
-      background: linear-gradient(135deg, #1e40af, #2563eb);
+    &--blue {
+      background: #3b82f6;
     }
 
-    &--navy {
-      background: linear-gradient(135deg, #1e3a5f, #1e5090);
+    &--cyan {
+      background: #06b6d4;
+    }
+
+    &--red {
+      background: #ef4444;
     }
   }
 
-  &__item-title {
-    font-size: 15px;
-    font-weight: 600;
-    color: #1a1a1a;
-    margin-bottom: 4px;
-  }
-
-  &__item-desc {
-    font-size: 12px;
-    color: #999999;
+  &__label {
+    font-size: 13px;
+    color: #333333;
+    font-weight: 500;
   }
 }