fix: 购买大会员字体添加下划线

Signed-off-by: tangshizhe <48740614+tangshizhe@users.noreply.github.com>

src/web/staticres/common-module/vipsubscribe/css/vip-free-introduce-template.css

@@ -44,6 +44,7 @@
 }
 .product-introduce .product-introduce-text .gold {
 	color: #FAE7CA;
+  text-decoration: underline;
 }
 .product-introduce .product-introduce-content {
 	padding: .36rem .16rem;