fix: restore in-view class assignment so pain-point content is visible on mobile

index.html

@@ -1030,6 +1030,10 @@
                     } else {
                         isAnimating = false;
                         currentIndex = index;
+                        // 给当前及之前所有卡片加 in-view，确保内容可见
+                        snapTargets.forEach((t, i) => {
+                            if (i <= index) t.classList.add('in-view');
+                        });
                     }
                 }
                 animFrame = requestAnimationFrame(step);
@@ -1037,6 +1041,10 @@
 
             // 初始化
             currentIndex = findCurrentIndex();
+            // 初始就给当前屏加 in-view
+            snapTargets.forEach((t, i) => {
+                if (i <= currentIndex) t.classList.add('in-view');
+            });
 
             // 完全接管触摸滚动 - 禁止原生滚动
             let canScroll = true;