my cell phone junk picture is a little blurry. But there is an obvious shadow in the middle navigation bar at the bottom. What is the reason for this? is there a solution (it only appears when it is pressed for a long time and then disappears in a second)
make sure you don't add the hover pseudo-class, and then add the attribute:
appearance: none;
outline: none;
check out the CSS style of this button, remove the related style or rewrite
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