flex上中下三欄佈局【遺留問題】

overflow-x:hidden overflow-y:scroll flex-grow:1 flex-basis:0/0% head h:1rem overflow-x:hidden overflow-y:scroll flex-basis:0/0% head h:1rem overflow-x:hidden overflow-y:scroll head h:1rem 高度爲什麼縮小？ <!D

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