feat(M08-A): 增加权益可视化选择器

miniapp/pages/room/detail.wxss

@@ -40,6 +40,46 @@
   background: #ffffff;
 }
 
+.benefit-list {
+  display: flex;
+  flex-direction: column;
+  gap: 16rpx;
+  margin-bottom: 20rpx;
+}
+
+.benefit-option {
+  padding: 22rpx;
+  border: 2rpx solid #d9dde5;
+  border-radius: 12rpx;
+  background: #ffffff;
+}
+
+.benefit-option.active {
+  border-color: #1f6feb;
+  background: #eef5ff;
+}
+
+.option-head {
+  display: flex;
+  gap: 16rpx;
+  align-items: flex-start;
+  justify-content: space-between;
+}
+
+.option-title {
+  flex: 1;
+  min-width: 0;
+  font-size: 30rpx;
+  font-weight: 600;
+  word-break: break-all;
+}
+
+.option-value {
+  flex: 0 0 auto;
+  color: #1f6feb;
+  font-weight: 600;
+}
+
 .action-grid button {
   flex: 1 1 280rpx;
 }
@@ -67,6 +107,11 @@
   color: #17823b;
 }
 
+.muted {
+  color: #777777;
+  line-height: 1.6;
+}
+
 .error {
   margin: 16rpx 0;
   color: #c73535;