<!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>css</title> </head> <body> <style> #a { width: 150px; height: 300px; background: radial-gradient(circle at top left, transparent 15px, #e6e4b7 0) top left, radial-gradient(circle at top right, transparent 15px, #e6e4b7 0) top right, radial-gradient(circle at bottom right, transparent 15px, #e6e4b7 0) bottom right, radial-gradient(circle at bottom left, transparent 15px, #e6e4b7 0) bottom left; background-size: 50% 50%; background-repeat: no-repeat; padding: 20px 24px 22px 20px; filter: drop-shadow(2px 2px 10px red); } #b { display: block; background: radial-gradient(circle at top left, transparent 15px, red 0) top left, radial-gradient(circle at top right, transparent 15px, red 0) top right, radial-gradient(circle at bottom right, transparent 15px, red 0) bottom right, radial-gradient(circle at bottom left, transparent 15px, red 0) bottom left; background-size: 50% 50%; background-repeat: no-repeat; width:100%; height: 100%; padding: 2px; } #b:before { content: ""; width: 100%; height: 100%; display: block; background: radial-gradient(circle at top left, transparent 15px, #e6e4b7 0) top left, radial-gradient(circle at top right, transparent 15px, #e6e4b7 0) top right, radial-gradient(circle at bottom right, transparent 15px, #e6e4b7 0) bottom right, radial-gradient(circle at bottom left, transparent 15px, #e6e4b7 0) bottom left; background-size: 50% 50%; background-repeat: no-repeat; } </style> <div id="a"> <div id="b"></div> </div> </body> </html>
内凹圆角的实现
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background : radial-gradient( circle at top left , transparent 15px , #58a 0 ) top left , radial-gradient( circle at top right , transparent 15px , #58a 0 ) top right , radial-gradient( circle at bottom left , transparent 15px , #58a 0 ) bottom left , radial-gradient( circle at bottom right , transparent 15px , #58a 0 ) bottom right ; background-repeat : no-repeat ; background- size : 50% 50% ; |