你可以伪造渐变之间的过渡，在一些堆叠渐变的不透明度中使用过渡，正如这里的一些答案所描述的:

CSS3动画与梯度。

你也可以转换位置，如下所述:

CSS3渐变过渡与背景位置。

这里还有一些技巧:

动画CSS3渐变。

基于你的问题中的css代码，我已经尝试代码如下，它为我工作(运行代码片段)，请自己尝试:

#container div a { display: inline-block; margin-top: 10%; padding: 1em 2em; font-size: 2em; color: #fff; font-family: arial, sans-serif; text-decoration: none; border-radius: 0.3em; position: relative; background-color: #ccc; background-image: linear-gradient(to top, #C0357E, #EE5840); -webkit-backface-visibility: hidden; z-index: 1; } #container div a:after { position: absolute; content: ''; top: 0; left: 0; width: 100%; height: 100%; border-radius: 0.3em; background-image: linear-gradient(to top, #6d8aa0, #343436); transition: opacity 0.5s ease-out; z-index: 2; opacity: 0; } #container div a:hover:after { opacity: 1; } #container div a span { position: relative; z-index: 3; } <div id="container"><div><a href="#"><span>Press Me</span></a></div></div>

基于你的问题中的css代码，我已经尝试代码如下，它为我工作，请自己尝试:

    #container div a {
  display: inline-block;
  margin-top: 10%;
  padding: 1em 2em;
  font-size: 2em;
  color: #fff;
  font-family: arial, sans-serif;
  text-decoration: none;
  border-radius: 0.3em;
  position: relative;
  background-color: #ccc;
  background-image: linear-gradient(to top, #C0357E, #EE5840);
  -webkit-backface-visibility: hidden;
  z-index: 1;
}

#container div a:after {
  position: absolute;
  content: '';
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 0.3em;
  background-image: linear-gradient(to top, #6d8aa0, #343436);
  transition: opacity 0.5s ease-out;
  z-index: 2;
  opacity: 0;
}

#container div a:hover:after {
  opacity: 1;
}
#container div a span {
  position: relative;
  z-index: 3;
}

这对你有用吗? 根据您的需要更改颜色:)

渐变过渡的部分解决方法是使用嵌入框阴影——你可以转换框阴影本身，也可以转换背景颜色——例如，如果你创建的嵌入框阴影与背景颜色相同，然后在背景颜色上使用过渡，它会产生一种错觉，即普通背景正在变为径向渐变

.button SPAN {
    padding: 10px 30px; 
    border: 1px solid ##009CC5;

    -moz-box-shadow: inset 0 0 20px 1px #00a7d1;
    -webkit-box-shadow: inset 0 0 20px 1px#00a7d1;
    box-shadow: inset 0 0 20px 1px #00a7d1; 

    background-color: #00a7d1;
    -webkit-transition: background-color 0.5s linear;
    -moz-transition: background-color 0.5s linear;
    -o-transition: background-color 0.5s linear;
    transition: background-color 0.5s linear;
}

.button SPAN:hover {
    background-color: #00c5f7; 
}

如上所述。渐变目前不支持CSS过渡。但在某些情况下，你可以通过将其中一种颜色设置为透明来解决这个问题，这样其他一些包装元素的背景色就会穿透，并进行过渡。

我知道这是一个老问题，但也许有人喜欢我在纯CSS解决方案的方式。从左到右渐变。

.contener{ width:300px; height:200px; background-size:cover; border:solid 2px black; } .ed { width: 0px; height: 200px; background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.75)); position: relative; opacity:0; transition:width 20s, opacity 0.6s; } .contener:hover .ed{ width: 300px; background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.75)); position: relative; opacity:1; transition:width 0.4s, opacity 1.1s; transition-delay: width 2s; animation-name: gradient-fade; animation-duration: 1.1s; -webkit-animation-name: gradient-fade; /* Chrome, Safari, Opera */ -webkit-animation-duration: 1.1s; /* Chrome, Safari, Opera */ } /* ANIMATION */ @-webkit-keyframes gradient-fade { 0% {background:linear-gradient(to right, rgba(0,0,255,0), rgba(255,0,0,0));} 2% {background:linear-gradient(to right, rgba(0,0,255,0.01875), rgba(255,0,0,0));} 4% {background:linear-gradient(to right, rgba(0,0,255,0.0375), rgba(255,0,0,0.0));} 6% {background:linear-gradient(to right, rgba(0,0,255,0.05625), rgba(255,0,0,0.0));} 8% {background:linear-gradient(to right, rgba(0,0,255,0.075), rgba(255,0,0,0));} 10% {background:linear-gradient(to right, rgba(0,0,255,0.09375), rgba(255,0,0,0));} 12% {background:linear-gradient(to right, rgba(0,0,255,0.1125), rgba(255,0,0,0));} 14% {background:linear-gradient(to right, rgba(0,0,255,0.13125), rgba(255,0,0,0));} 16% {background:linear-gradient(to right, rgba(0,0,255,0.15), rgba(255,0,0,0));} 18% {background:linear-gradient(to right, rgba(0,0,255,0.16875), rgba(255,0,0,0));} 20% {background:linear-gradient(to right, rgba(0,0,255,0.1875), rgba(255,0,0,0));} 22% {background:linear-gradient(to right, rgba(0,0,255,0.20625), rgba(255,0,0,0.01875));} 24% {background:linear-gradient(to right, rgba(0,0,255,0.225), rgba(255,0,0,0.0375));} 26% {background:linear-gradient(to right, rgba(0,0,255,0.24375), rgba(255,0,0,0.05625));} 28% {background:linear-gradient(to right, rgba(0,0,255,0.2625), rgba(255,0,0,0.075));} 30% {background:linear-gradient(to right, rgba(0,0,255,0.28125), rgba(255,0,0,0.09375));} 32% {background:linear-gradient(to right, rgba(0,0,255,0.3), rgba(255,0,0,0.1125));} 34% {background:linear-gradient(to right, rgba(0,0,255,0.31875), rgba(255,0,0,0.13125));} 36% {background:linear-gradient(to right, rgba(0,0,255,0.3375), rgba(255,0,0,0.15));} 38% {background:linear-gradient(to right, rgba(0,0,255,0.35625), rgba(255,0,0,0.16875));} 40% {background:linear-gradient(to right, rgba(0,0,255,0.375), rgba(255,0,0,0.1875));} 42% {background:linear-gradient(to right, rgba(0,0,255,0.39375), rgba(255,0,0,0.20625));} 44% {background:linear-gradient(to right, rgba(0,0,255,0.4125), rgba(255,0,0,0.225));} 46% {background:linear-gradient(to right, rgba(0,0,255,0.43125),rgba(255,0,0,0.24375));} 48% {background:linear-gradient(to right, rgba(0,0,255,0.45), rgba(255,0,0,0.2625));} 50% {background:linear-gradient(to right, rgba(0,0,255,0.46875), rgba(255,0,0,0.28125));} 52% {background:linear-gradient(to right, rgba(0,0,255,0.4875), rgba(255,0,0,0.3));} 54% {background:linear-gradient(to right, rgba(0,0,255,0.50625), rgba(255,0,0,0.31875));} 56% {background:linear-gradient(to right, rgba(0,0,255,0.525), rgba(255,0,0,0.3375));} 58% {background:linear-gradient(to right, rgba(0,0,255,0.54375), rgba(255,0,0,0.35625));} 60% {background:linear-gradient(to right, rgba(0,0,255,0.5625), rgba(255,0,0,0.375));} 62% {background:linear-gradient(to right, rgba(0,0,255,0.58125), rgba(255,0,0,0.39375));} 64% {background:linear-gradient(to right,rgba(0,0,255,0.6), rgba(255,0,0,0.4125));} 66% {background:linear-gradient(to right, rgba(0,0,255,0.61875), rgba(255,0,0,0.43125));} 68% {background:linear-gradient(to right, rgba(0,0,255,0.6375), rgba(255,0,0,0.45));} 70% {background:linear-gradient(to right, rgba(0,0,255,0.65625), rgba(255,0,0,0.46875));} 72% {background:linear-gradient(to right, rgba(0,0,255,0.675), rgba(255,0,0,0.4875));} 74% {background:linear-gradient(to right, rgba(0,0,255,0.69375), rgba(255,0,0,0.50625));} 76% {background:linear-gradient(to right, rgba(0,0,255,0.7125), rgba(255,0,0,0.525));} 78% {background:linear-gradient(to right, rgba(0,0,255,0.73125),,rgba(255,0,0,0.54375));} 80% {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.5625));} 82% {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.58125));} 84% {background:linear-gradient(to right, rgba(0,0,255,0.75),rgba(255,0,0,0.6));} 86% {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.61875));} 88% {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.6375));} 90% {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.65625));} 92% {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.675));} 94% {background:linear-gradient(to right, rgba(0,0,255,0.75),rgba(255,0,0,0.69375));} 96% {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.7125));} 98% {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.73125),);} 100% {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.75));} } <div class="contener" style=""> <div class="ed"></div> </div>

在下面的例子中，一个锚标记有一个子标记和一个孙子标记。孙子有远背景梯度。近背景中的子元素是透明的，但是有渐变要过渡。在悬停时，子物体的不透明度在1秒内从0过渡到1。

下面是CSS:

.bkgrndfar {
  position:absolute;
  top:0;
  left:0;
  z-index:-2;
  height:100%;
  width:100%;
  background:linear-gradient(#eee, #aaa);
}

.bkgrndnear {
  position:absolute;
  top:0;
  left:0;
  height:100%;
  width:100%;
  background:radial-gradient(at 50% 50%, blue 1%, aqua 100%);
  opacity:0;
  transition: opacity 1s;
}

a.menulnk {
  position:relative;
  text-decoration:none;
  color:#333;
  padding: 0 20px;
  text-align:center;
  line-height:27px;
  float:left;
}

a.menulnk:hover {
  color:#eee;
  text-decoration:underline;
}

/* This transitions child opacity on parent hover */
a.menulnk:hover .bkgrndnear {
  opacity:1;
}

这是HTML:

<a href="#" class="menulnk">Transgradient
<div class="bkgrndfar">
  <div class="bkgrndnear">
  </div>
</div>
</a>

以上仅在最新版本的Chrome中进行测试。这些是悬停前，悬停中途和完全过渡的悬停图像: