220px

2024-12-09写一个左中右的满屏布局，左右固定220px,中间自适应并且要优先加载
<!DOCTYPEhtml><htmllang="en"><head><metacharset="UTF-8"><metaname="viewport"content="width=device-width,initial-scale=1.0"><title>Left-Center-RightLayout&l