feat: harden phase one workflows

miniapp/miniprogram/pages/products/index.wxss

@@ -1,6 +1,28 @@
+.page-heading {
+  padding-bottom: 4rpx;
+}
+
 .category-scroll {
   white-space: nowrap;
-  margin-bottom: 20rpx;
+  margin-bottom: 24rpx;
+}
+
+.search-row {
+  display: flex;
+  gap: 14rpx;
+  align-items: center;
+  margin-bottom: 18rpx;
+}
+
+.search-input {
+  flex: 1;
+  margin: 0;
+}
+
+.search-button {
+  width: 132rpx;
+  margin: 0;
+  min-height: 80rpx;
 }
 
 .category-item {
@@ -8,12 +30,15 @@
   align-items: center;
   justify-content: center;
   min-width: 120rpx;
-  height: 64rpx;
-  padding: 0 20rpx;
+  height: 68rpx;
+  padding: 0 24rpx;
   margin-right: 12rpx;
   background: #ffffff;
   border: 1rpx solid #d9e0e8;
-  border-radius: 6rpx;
+  border-radius: 999rpx;
+  color: #334155;
+  font-size: 25rpx;
+  font-weight: 700;
 }
 
 .category-item.active {
@@ -21,3 +46,43 @@
   background: #0f766e;
   border-color: #0f766e;
 }
+
+.product-list {
+  display: flex;
+  flex-direction: column;
+  gap: 18rpx;
+}
+
+.product-card {
+  display: flex;
+  gap: 20rpx;
+  padding: 20rpx;
+  background: #ffffff;
+  border: 1rpx solid #e4eaf0;
+  border-radius: 16rpx;
+  box-shadow: 0 8rpx 24rpx rgba(20, 36, 58, 0.05);
+}
+
+.product-thumb {
+  width: 160rpx;
+  height: 160rpx;
+  flex-shrink: 0;
+  overflow: hidden;
+  border-radius: 14rpx;
+}
+
+.product-info {
+  min-width: 0;
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  gap: 12rpx;
+}
+
+.product-desc {
+  min-height: 64rpx;
+}
+
+.product-footer {
+  margin-top: auto;
+}