otyf.error('栈为空，无法出栈！'); return; }
                isBusy.value = true;
                clearHighlights();
                
                const itemToRemove = stack.value[top.value];
                const removedValue = itemToRemove.value;
                
                notyf.open({ type: 'info', message: `<b>第1步:</b> 定位到栈顶元素 (橙色高亮)，准备移除。` });
                itemToRemove.highlight = 'remove';
                await sleep(2500);

        