style(home): refine section title and entry card styling

- Update section title color from #1e293b to #0f172a for improved contrast
- Add letter-spacing (0.5rpx) to section titles for better readability
- Remove gradient background from entry card icons for cleaner appearance
- Remove box-shadow and border styling from entry card icons for simplified design
- Update entry title color from #0f172a to #1e293b for visual hierarchy
- Streamline entry card icon styling while maintaining layout structure

assets/css/home/index.scss

@@ -100,7 +100,8 @@
       .section-title {
         font-size: 32rpx;
         font-weight: 600;
-        color: #1e293b;
+        color: #0f172a;
+        letter-spacing: 0.5rpx;
       }
     }
 
@@ -194,16 +195,10 @@
               position: relative;
               width: 88rpx;
               height: 88rpx;
-              background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
               border-radius: 22rpx;
               display: flex;
               align-items: center;
               justify-content: center;
-              box-shadow: 
-                0 4rpx 12rpx rgba(59, 130, 246, 0.08),
-                inset 0 1rpx 0 rgba(255, 255, 255, 1),
-                inset 0 -1rpx 0 rgba(148, 163, 184, 0.1);
-              border: 1rpx solid rgba(59, 130, 246, 0.1);
             }
 
             .icon-shine {
@@ -227,7 +222,7 @@
             .entry-title {
               font-size: 30rpx;
               font-weight: 600;
-              color: #0f172a;
+              color: #1e293b;
               line-height: 1.3;
               letter-spacing: 0.5rpx;
               margin-bottom: 6rpx;