CSS3 变色背景 动态边框

动态边框样式参考： https://juejin.im/post/5cdbc938f265da034d2a38c1#heading-2

 

// css

body {
    width: 100wh;
    height: 90vh;
    color: #fff;
    background: linear-gradient(-45deg, #EE7752, #E73C7E, #23A6D5, #23D5AB);
    background-size: 400% 400%;
    animation: Gradient 15s ease infinite;
}

@keyframes Gradient {
    0% {
        background-position: 0% 50%
    }
    50% {
        background-position: 100% 50%
    }
    100% {
        background-position: 0% 50%
    }
}

.brick{
	margin: 20px auto;
	width: 200px;
	height: 200px;
	background: linear-gradient(0, #108b96 2px, #108b96 2px) no-repeat,
	    	linear-gradient(-90deg, #108b96 2px, #108b96 2px) no-repeat,
	    	linear-gradient(-180deg, #108b96 2px, #108b96 2px) no-repeat,
	    	linear-gradient(-270deg, #108b96 2px, #108b96 2px) no-repeat;
	background-size: 0 2px, 2px 0, 0 2px, 2px 0;
	background-position: left top, right top, right bottom, left bottom;
	transition: ease-in 0.5s;
}
.brick:hover {
	background-size: 100% 2px, 2px 100%, 100% 2px, 2px 100%;
}

// html