feat: 优化页面样式

miniprogram/pages/index/index.less

@@ -15,7 +15,7 @@ page {
 .wrapper {
     background-color: #ffffff;
     border-radius: 20rpx;
-    padding: 24rpx;
+    padding: 36rpx 24rpx;
     box-shadow: 0 6rpx 8rpx rgba(0, 0, 0, 0.15);
     margin: 30rpx 0;
     display: flex;
@@ -24,7 +24,7 @@ page {
     .wrapper-title {
         font-size: 32rpx;
         color: #141414;
-        margin-bottom: 24rpx;
+        margin-bottom: 36rpx; // 增大标题与内容间距
         font-weight: bold;
         text-align: center;
     }
@@ -34,18 +34,78 @@ page {
     }
 
     .word-card-box {
-        padding: 34rpx 0;
+        padding: 38rpx 0;
 
         .word-list-empty {
+            display: flex;
+            flex-direction: column;
+            align-items: center;
+            justify-content: center;
+            padding: 60rpx 40rpx;
             text-align: center;
-            font-size: 28rpx;
-            color: #999;
+
+            .empty-icon {
+                width: 120rpx;
+                height: 120rpx;
+                background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
+                border-radius: 50%;
+                display: flex;
+                align-items: center;
+                justify-content: center;
+                margin-bottom: 32rpx;
+                box-shadow: 0 4rpx 12rpx rgba(59, 130, 246, 0.15);
+
+                .toy-icon {
+                    font-size: 48rpx;
+                    color: #3b82f6;
+                }
+            }
+
+            .empty-title {
+                font-size: 32rpx;
+                font-weight: 600;
+                color: #374151;
+                margin-bottom: 16rpx;
+                line-height: 1.4;
+            }
+
+            .empty-desc {
+                font-size: 26rpx;
+                color: #6b7280;
+                line-height: 1.6;
+                margin-bottom: 32rpx;
+                max-width: 400rpx;
+            }
+
+            .empty-hint {
+                display: flex;
+                align-items: center;
+                background: #f8fafc;
+                border: 1rpx solid #e2e8f0;
+                border-radius: 12rpx;
+                padding: 20rpx 24rpx;
+                max-width: 500rpx;
+
+                .hint-icon {
+                    font-size: 24rpx;
+                    margin-right: 12rpx;
+                    margin-top: -2rpx;
+                    flex-shrink: 0;
+                }
+
+                .hint-text {
+                    font-size: 22rpx;
+                    color: #64748b;
+                    line-height: 1.5;
+                    text-align: left;
+                }
+            }
         }
 
         .word-cards-grid {
             display: grid;
             grid-template-columns: repeat(2, 1fr);
-            gap: 24rpx;
+            gap: 38rpx; // 间距从24rpx提升到32rpx
         }
     }