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css给div的四个角写正方形.html

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			.box {
				width: 200px;
				height: 200px;
				border: 1px solid #18324C;
				padding: 2px;
				background: linear-gradient(to left, #9EE7FF, #9EE7FF) no-repeat left top,
					linear-gradient(to left, #9EE7FF, #9EE7FF) no-repeat right top,
					linear-gradient(to left, #9EE7FF, #9EE7FF) no-repeat left bottom,
					linear-gradient(to left, #9EE7FF, #9EE7FF) no-repeat right bottom;
				background-size: 8px 8px, 8px 8px, 8px 8px, 8px 8px;
			}
		</style>
	</head>
	<body>
		<div class="box">
		</div>
	</body>
</html>