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src/pages/courseResourcesAll.vue

@@ -161,7 +161,7 @@ export default {
       }).then(res => {
         if (res.code == "1") {
           this.secFilterData = [{ kc_id: undefined, kc_name: '全部' }, ...(res.data.page_data || [])];
-          this.chooseVolume = res.data.page_data?.[0]?.kc_id;
+          this.chooseVolume = undefined;
         }
       }).catch(error => {
         console.log(error);