html - 如何获得 2d 转换 css 垂直方式

Question

我使用以下 CSS 2d Transforms 代码构建了一个 h2 从内容的左侧到右侧的水平方式。 我需要相同的效果，但以“垂直方式”，从下到上。
此外，我喜欢从绿色到红色的渐变颜色效果。

您可以在此处找到演示 Link效果 12

.hovereffect {
  width: 100%;
  height: 100%;
  float: left;
  overflow: hidden;
  position: relative;
  text-align: center;
  cursor: default;
  background: #42b078;
}

.hovereffect .overlay {
  width: 100%;
  height: 100%;
  position: absolute;
  overflow: hidden;
  top: 0;
  left: 0;
  padding: 50px 20px;
}

.hovereffect img {
  display: block;
  position: relative;
  max-width: none;
  width: calc(100% + 20px);
  -webkit-transition: opacity 0.35s, -webkit-transform 0.35s;
  transition: opacity 0.35s, transform 0.35s;
  -webkit-transform: translate3d(-10px,0,0);
  transform: translate3d(-10px,0,0);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

.hovereffect:hover img {
  opacity: 0.4;
  filter: alpha(opacity=40);
  -webkit-transform: translate3d(0,0,0);
  transform: translate3d(0,0,0);
}

.hovereffect h2 {
  text-transform: uppercase;
  color: #fff;
  text-align: center;
  position: relative;
  font-size: 17px;
  overflow: hidden;
  padding: 0.5em 0;
  background-color: transparent;
}

.hovereffect h2:after {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: #fff;
  content: '';
  -webkit-transition: -webkit-transform 0.35s;
  transition: transform 0.35s;
  -webkit-transform: translate3d(-100%,0,0);
  transform: translate3d(-100%,0,0);
}

.hovereffect:hover h2:after {
  -webkit-transform: translate3d(0,0,0);
  transform: translate3d(0,0,0);
}

.hovereffect a, .hovereffect p {
  color: #FFF;
  opacity: 0;
  filter: alpha(opacity=0);
  -webkit-transition: opacity 0.35s, -webkit-transform 0.35s;
  transition: opacity 0.35s, transform 0.35s;
  -webkit-transform: translate3d(100%,0,0);
  transform: translate3d(100%,0,0);
}

.hovereffect:hover a, .hovereffect:hover p {
  opacity: 1;
  filter: alpha(opacity=100);
  -webkit-transform: translate3d(0,0,0);
  transform: translate3d(0,0,0);
}

<div class="col-lg-3 col-md-4 col-sm-6 col-xs-12">
  <div class="hovereffect">
    <img class="img-responsive" src="http://placehold.it/350x250" alt="">
    <div class="overlay">
      <h2>Effect 12</h2>
      <p> 
        <a href="#">LINK HERE</a>
      </p> 
    </div>
  </div>
</div>

Answer 1

如果您希望创建垂直变化的设计，请考虑以下效果:

.hovereffect,
.hovereffect img {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  overflow: hidden;
}
.overlay {
  z-index: 10;
  position: relative;
  text-align: center;
}
.overlay p {
  position: relative;
  transform: translateY(-100vh);
  opacity: 0;
  transition: all 0.4s;
}
.hovereffect h2 {
  position: relative;
}
.hovereffect h2:after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  width: 0;
  height: 5px;
  background: tomato;
  transform: translateY(100vh);
  opacity: 0;
  transition: all 0.4s;
}
.hovereffect:hover p,
.hovereffect:hover h2:after {
  transform: translateY(0);
  opacity: 1;
}
.hovereffect:hover h2:after{left:0;width:100%;}

<div class="col-lg-3 col-md-4 col-sm-6 col-xs-12">
  <div class="hovereffect">
    <img class="img-responsive" src="http://placehold.it/350x250" alt="">
    <div class="overlay">
      <h2>Effect 12</h2>
      <p>
        <a href="#">LINK HERE</a>
      </p>
    </div>
  </div>
</div>