修复讲解页返回按钮对齐

src/components/explain/ExplainHallSelect.vue

@@ -332,27 +332,37 @@ const handleBack = () => {
   display: flex;
   align-items: center;
   justify-content: flex-start;
-  gap: 2px;
+  gap: 6px;
   z-index: 1;
 }
 
 .header-back-icon {
+  position: relative;
   width: 18px;
-  height: 24px;
+  height: 18px;
   display: flex;
   align-items: center;
   justify-content: center;
-  font-size: 27px;
-  line-height: 24px;
+  font-size: 0;
+  line-height: 0;
   color: #151713;
 }
 
+.header-back-icon::before {
+  content: '';
+  width: 9px;
+  height: 9px;
+  border-left: 2px solid currentColor;
+  border-bottom: 2px solid currentColor;
+  transform: translateX(2px) rotate(45deg);
+}
+
 .header-back-text {
   display: flex;
   align-items: center;
-  height: 24px;
+  height: 20px;
   font-size: 15px;
-  line-height: 24px;
+  line-height: 20px;
   font-weight: 500;
   color: #151713;
 }