不规则投影
?> 背景知识：
filter, radial-gradient, border-image
<script v-pre type="text/x-template" id="irregular-projection">
<style>
main {
width: 100%;
padding: 60px 0 30px 0;
display: flex;
flex-wrap: wrap;
justify-content: space-around;
}
.projection {
width: 228px; height: 180px;
margin-bottom: 29px;
background: #b4a078;
position: relative;
}
.row1 > .projection:nth-of-type(1) {
border-radius: 5px;
filter: drop-shadow(2px 2px 2px rgba(180,160,120,.9));
}
.row1 > .projection:nth-of-type(1)::before{
content: '';
position: absolute;
width: 0; height: 0;
top: 65px; right: -20px;
border: 22px solid transparent;
border-left-color: #b4a078;
border-right-width: 0;
}
.row1 > .projection:nth-of-type(2) {
background: transparent;
border: 6px dotted #b4a078;
filter: drop-shadow(2px 2px 2px rgba(180,160,120,.9));
}
.row2 > .projection:nth-of-type(1) {
background: radial-gradient(circle at bottom right, transparent 29px, #b4a078 30px) bottom right;
filter: drop-shadow(2px 2px 2px rgba(180,160,120,.9));
}
.row2 > .projection:nth-of-type(2) {
border: 29px dotted #b4a078;
border-image: 1 url('data:image/svg+xml, ');
filter: drop-shadow(2px 2px 2px rgba(180,160,120,.9));
background-clip: padding-box;
}
</style>
<script>
</script>
</script>
浏览器支持
<iframe src="https://caniuse.bitsofco.de/embed/index.html?feat=css-filters&periods=future_1,current,past_1,past_2,past_3&accessible-colours=false" frameborder="0" width="100%" height="458px"></iframe>
<iframe src="https://caniuse.bitsofco.de/embed/index.html?feat=css-gradients&periods=future_1,current,past_1,past_2,past_3&accessible-colours=false" frameborder="0" width="100%" height="436px"></iframe>
<iframe src="https://caniuse.bitsofco.de/embed/index.html?feat=border-image&periods=future_1,current,past_1,past_2,past_3&accessible-colours=false" frameborder="0" width="100%" height="436px"></iframe>
