perf(components): 优化 UseGuidance 组件样式

src/layout/UseGuidance.vue

@@ -263,6 +263,7 @@ const finishCurrentStep = async () => {
 
 .use-guide-step-button-container {
   display: flex;
+  align-items: center;
   justify-content: space-between;
   max-width: 686px;