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<!DOCTYPE html> <html> <head> <style> .flex-container { display: -webkit-flex; display: flex; -webkit-align-items: flex-start; align-items: flex-start; width: 400px; height: 250px; background-color: lightgrey; } .flex-item { background-color: cornflowerblue; width: 100px; margin: 10px; } </style> </head> <body> <div class="flex-container"> <div class="flex-item">弹性项目 2</div> <div class="flex-item">弹性项目 2</div> <div class="flex-item">弹性项目 3</div> </div> </body> </html>