Refine subscription renewal button layout

weapp/pages/settings/settings.wxml

@@ -152,7 +152,7 @@
           </block>
         </view>
 
-        <button wx:if="{{subscribeChecked}}" class="btn btn-primary" bindtap="renewSubscribe">订阅一次 TA 的提醒</button>
+        <button wx:if="{{subscribeChecked}}" class="subscribe-renew" bindtap="renewSubscribe">订阅一次 TA 的提醒</button>
 
         <!-- 说明 -->
         <view class="subscribe-note">

weapp/pages/settings/settings.wxss

@@ -221,6 +221,33 @@ scroll-view.page-bg { height: 100vh; overflow-y: scroll; -webkit-overflow-scroll
   flex: 1;
 }
 
+.subscribe-renew {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  box-sizing: border-box;
+  width: 100%;
+  height: 80rpx;
+  margin: 24rpx 0 0;
+  padding: 0 16rpx;
+  border: none;
+  border-radius: 20rpx;
+  background: #B74768;
+  color: #FFFFFF;
+  font-family: inherit;
+  font-size: 26rpx;
+  font-weight: 500;
+  line-height: 1;
+  white-space: nowrap;
+  box-shadow: none;
+}
+.subscribe-renew::after {
+  border: none;
+}
+.subscribe-renew:active {
+  background: #943C58;
+}
+
 .subscribe-note {
   background: #F8F8F8;
   border-radius: 16rpx;