<!DOCTYPE html><html> <head> <meta charset="utf-8"> <title></title> <style> .box{ width: 200px; height: 200px; border: 1px solid black; position: relative; } .box span{ width: 50px; height: 50px; background-color: yellow; position: absolute; right: -10px; top: -10px; } </style> </head> <body> <div class="box"> <div class="item"></div> <span></span> </div> </body></html>
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