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在设计图会经常使用到的阴影效果，如何用css3来实现呢？这篇文章主要整理box-shadow的一些好看常用的投影效果。
1、曲面/椭圆投影效果:
代码如下：
.shadow_wrap{
width: 100%;background:#E6EEF6;max-width: 600px;margin: auto;overflow: hidden;
}
.shadow1{
background-color: #9ecf68;
}
.shadow2{
background-color: #00bcd4;
}
.shadow1,.shadow2{
position:relative;
width:40%;
height:200px;
float:left;
margin:5% 15px;
border-radius:5px;
box-shadow:0 1px 4px rgba(0, 0, 0, 0.3), 0 0 20px rgba(0, 0, 0, 0.1) inset;
}
.shadow_wrap h3{
width:87%;
height:100px;
margin-left:6%;
text-align:center;
padding-top:60px;
color:#fff;
}
/**styling shadows**/
.shadow1:before, .shadow1:after{
position:absolute;
content:"";
bottom:12px;left:15px;top:80%;
width:45%;
background:#9B7468;
z-index:-1;
-webkit-box-shadow: 0 20px 15px #9B7468;
-moz-box-shadow: 0 20px 15px #9B7468;
box-shadow: 0 20px 15px #9B7468;
-webkit-transform: rotate(-6deg);
-moz-transform: rotate(-6deg);
transform: rotate(-6deg);
}
.shadow1:after{
-webkit-transform: rotate(6deg);
-moz-transform: rotate(6deg);
transform: rotate(6deg);
right: 15px;left: auto;
}
.shadow2:before, .shadow2:after{
position:absolute;
content:"";
top:100px;bottom:5px;left:30px;right:30px;
z-index:-1;
box-shadow:0 0 40px 13px #486685;
border-radius:100px/20px;
}
椭圆投影1
椭圆投影2
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2、悬浮投影效果:
悬浮投影
实现代码：
.shadow_wrap{
margin-top: 50px; margin-bottom: 10px;
}
.floating {
width:60%;max-width: 180px; height: 150px;line-height: 150px; background: #ff9800;color:#fff;text-align: center;cursor: pointer;
position: relative;transform: translateY(0);transition: transform 1s;
}
.floating:after {
content: "";
display: block;
position: absolute;
bottom: -30px;
left: 50%;
height: 8px;
width: 100%;
box-shadow: 0px 0px 15px 0px rgba(0, 0, 0, 0.4);
border-radius: 50%;
background-color: rgba(0, 0, 0, 0.2);
transform: translate(-50%, 0);
transition: transform 1s;
}
/*鼠标移上去的效果*/
.floating:hover {
transform: translateY(-40px);
transition: transform 1s;
}
.floating:hover:after {
transform: translate(-50%, 40px) scale(0.75);
transition: transform 1s;
}
悬浮投影
3、3D文字投影效果:
3D效果-fly63.com
代码如下：
width:100%;color: #fff;
text-shadow: 0 1px 0 hsl(174,5%,80%),0 2px 0 hsl(174,5%,75%),0 3px 0 hsl(174,5%,70%),0 4px 0 hsl(174,5%,66%),0 5px 0 hsl(174,5%,64%),0 6px 0 hsl(174,5%,62%),0 7px 0 hsl(174,5%,61%),0 8px 0 hsl(174,5%,60%),0 0 5px rgba(0,0,0,.05),0 1px 3px rgba(0,0,0,.2),0 3px 5px rgba(0,0,0,.2),0 5px 10px rgba(0,0,0,.2),0 10px 10px rgba(0,0,0,.2),0 20px 20px rgba(0,0,0,.3);
}
3D效果-fly63.com
4、动画投影效果:
fly63
代码如下：
font-family: ‘Righteous‘, serif;
margin:0;
position: relative;
display: inline-block;
color: #61d9a8;
font-size: 8em;
text-shadow: .03em .03em 0 hsla(230,40%,50%,1);
}
.shadow_wrap h1:after {
content: attr(data-shadow);
position: absolute;
top: .06em; left: .06em;
z-index: -1;
text-shadow: none;
background-image:linear-gradient(45deg,transparent 45%,hsla(48,20%,90%,1) 45%,hsla(0, 0%, 0%,1) 55%,transparent 0);
background-size: .05em .05em;-webkit-background-clip: text;-webkit-text-fill-color: transparent;
animation: shad-anim 15s linear infinite;
}
@keyframes shad-anim {0% {background-position: 0 0}100% {background-position: 100% -100%}
}