我认为只使用CSS时最好的近似方法是使用radial-gradient
:
.box {
margin:50px;
height:300px;
background:
radial-gradient(ellipse at top ,transparent 19.5%,#3adecf 20%, #3ae7be) top/400% 50% no-repeat,
radial-gradient(ellipse at bottom ,transparent 19.5%, #3ae3c5 20%,#3ae7be) bottom/400% 50% no-repeat;
}
body {
background:pink;
}
<div class="box">
</div>
或者您考虑使用 mask
。
.box {
margin:50px;
height:300px;
background:linear-gradient(45deg,red,blue);
-webkit-mask:
radial-gradient(60% 30% at top ,transparent 98%, #fff) top /100% 50% no-repeat,
radial-gradient(60% 30% at bottom ,transparent 98%, #fff) bottom/100% 50% no-repeat;
mask:
radial-gradient(60% 30% at top ,transparent 98%, #fff) top /100% 50% no-repeat,
radial-gradient(60% 30% at bottom ,transparent 98%, #fff) bottom/100% 50% no-repeat;
}
body {
background:pink;
}
<div class="box">
</div>
/* top ellipse */
.top {
border-radius: 50%;
width: 150%;
height: 200px;
transform: translate(-15%, 20%);
background: white;
}
/* content's parent container */
.mid {
padding: 4rem;
background: linear-gradient(-20deg, #3adecf, #3ae3c5);
}
.content {
position: relative;
z-index: 20;
color: white;
font-size: 30px;
}
/* bottom ellipse */
.bottom {
border-radius: 50%;
width: 200%;
height: 200px;
transform: translate(-25%, -20%);
background: white;
}
.all {
overflow-y: hidden;
position: relative;
}
.t-circle {
background: #00ccdd;
position: absolute;
top: 5%;
right: -200px;
z-index: 10;
width: 400px;
height: 400px;
border-radius: 50%;
opacity: 0.2;
pointer-events: none;
}
<div class="all">
<div class="top">Top</div>
<div class="mid">
<div class="content">
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</div>
</div>
<div class="bottom">bottom</div>
<div class="t-circle"></div>
</div>