悬停时调整背景大小

Question

当你将鼠标悬停在图像上时，你会发现它会被半透明的背景替换。

透明背景应该覆盖整个图片，但实际上只覆盖了文本所占据的区域。

我该如何确保它覆盖整张图片，而不管盒子内的文本？

/*Programs*/

ul.img-list {
  list-style-type: none;
  margin: 0;
  padding: 0;
  text-align: center;
}

ul.img-list li {
  display: inline-block;
  width: 100%;
  height: 100%;
  margin: 0;
  position: relative;
}

div.text-content {
  background: rgba(26,33,43,0.9);
  color: white;
  cursor: pointer;
  display: table;
  left: 0;
  position: absolute;
  top: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  font-size: 20px;
  font-family: Roboto;
  line-height: 24px;
  font-weight: 200;
  text-align: center;
  overflow-y: auto;
  padding-right: 25px;
  padding-left: 25px;
  padding-top: 25px;
  padding-bottom: 25px;
  box-sizing: border-box;
 -webkit-transition: opacity 500ms;
  -moz-transition: opacity 500ms;
  -o-transition: opacity 500ms;
  transition: opacity 500ms;
  overflow-y: auto;
}

div.text-content div {
  display: block;
  text-align: center;
  vertical-align: middle;
}

ul.img-list li:hover div.text-content {
  opacity: 1;
}

/* Events page */

/*Event link button*/

.btn {
background-color: transparent;
border-radius: 42px;
border: 2px solid #ffffff;
display: inline-block;
cursor: pointer;
font-family: Roboto;
line-height: 28px;
font-size: 24px;
padding: 5px 15px 5px 15px;
margin-right: 45px;
margin-left: 45px;
}

.btn:link {
    color: #ffffff;
    text-decoration: none;
}

.btn:visited {
  color: #1b1c16;
  text-decoration: none;
}

.btn:hover {
  background-color: #ffffff;
  color: #1b1c16 !important;
}

.btn:active {
 position: relative;
 top: 1px;
}

/*All events button*/

.evens_btn {
background: ;
}

.events_btn>span{
color: #f9c70f;
font-family: Roboto;
color: #ffffff;
font-size: 24px !important;
background: ;
text-decoration: none !important;
padding: 10px 0px 10px 0px;
}

.events_btn>i{
color: #ffffff; 
margin-right: 15px; 
font-size: 50px;
}

.events_btn:link>i {
    color: #f9c70f;
}

.events_btn:visited>i {
  color: #ffffff;
  text-decoration: none;
}

.events_btn:hover>i {
 color: #f9c70f;
}

.events_btn:active>i {
  color: #f9c70f;
}

.events_btn:link>span {
    color: #f9c70f;
}

.events_btn:visited>span {
  color: #ffffff;
  text-decoration: none;
}

.events_btn:hover>span {
 color: #f9c70f ;
}

.events_btn:active>span {
  color: #f9c70f;
}

<ul class="img-list">
  <li><img style="width: 100%; height: 100%;" src="http://www.sflsupport.org/wp-content/uploads/2016/06/Programs-11.jpg" />                              
    <div class="text-content">
      <div>
       <h5 style="color: white; font-size: 38px; font-family: Montserrat; font-weight: 600; line-height: 42px; letter-spacing: 2px;">WEBINAR<br/>ARCHIVE</h5>
       <hr style="border-top: 2px solid #ffffff; width: auto; margin: 10px 30px;"/>Throughout the years SFL has ammased the library of recorded webinars from some of the leading libertarian voices about numerous topics in philosophy, politics, and economics. How can the government fix the higher education bubble? What is Ayn Rand's theory of natural rights? Tune in to our videos for answers to these questions and many more.
      <br>
      <a class="btn" style="color: white; text-align: center; margin-top: 10px; padding-top: 5px; padding-bottom: 5px; padding-left: 30px; padding-right: 30px; text-decoration: none; font-size: 24px; font-weight: 600; border: 3px solid white; letter-spacing: 2px;" href="http://www.google.com/" target="_blank">READ MORE</a>
      </div>
    </div>
  </li>
</ul>

- Ira

Answer 1

从 .text-content 中移除 display:table;。并在其中添加 bottom:0;。

- Aslam

---

如果内容需要垂直居中，则将另一个div作为.text-content的直接子元素，并将display: table CSS属性应用于此元素。 - Praveen Murali

Answer 2

删除 display: table;，并使用CSS Flexbox的 align-content 属性来垂直居中内容。

请查看下面的代码片段:

/*Programs*/

ul.img-list {
  list-style-type: none;
  margin: 0;
  padding: 0;
  text-align: center;
}

ul.img-list li {
  display: inline-block;
  width: 100%;
  height: 100%;
  margin: 0;
  position: relative;
}

div.text-content {
  background: rgba(26,33,43,0.9);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  left: 0;
  position: absolute;
  top: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  font-size: 20px;
  font-family: Roboto;
  line-height: 24px;
  font-weight: 200;
  text-align: center;
  overflow-y: auto;
  padding-right: 25px;
  padding-left: 25px;
  padding-top: 25px;
  padding-bottom: 25px;
  box-sizing: border-box;
 -webkit-transition: opacity 500ms;
  -moz-transition: opacity 500ms;
  -o-transition: opacity 500ms;
  transition: opacity 500ms;
  overflow-y: auto;
}

div.text-content div {
  display: block;
  text-align: center;
  vertical-align: middle;
}

ul.img-list li:hover div.text-content {
  opacity: 1;
}

/* Events page */

/*Event link button*/

.btn {
background-color: transparent;
border-radius: 42px;
border: 2px solid #ffffff;
display: inline-block;
cursor: pointer;
font-family: Roboto;
line-height: 28px;
font-size: 24px;
padding: 5px 15px 5px 15px;
margin-right: 45px;
margin-left: 45px;
}

.btn:link {
    color: #ffffff;
    text-decoration: none;
}

.btn:visited {
  color: #1b1c16;
  text-decoration: none;
}

.btn:hover {
  background-color: #ffffff;
  color: #1b1c16 !important;
}

.btn:active {
 position: relative;
 top: 1px;
}

/*All events button*/

.evens_btn {
background: ;
}

.events_btn>span{
color: #f9c70f;
font-family: Roboto;
color: #ffffff;
font-size: 24px !important;
background: ;
text-decoration: none !important;
padding: 10px 0px 10px 0px;
}

.events_btn>i{
color: #ffffff; 
margin-right: 15px; 
font-size: 50px;
}

.events_btn:link>i {
    color: #f9c70f;
}

.events_btn:visited>i {
  color: #ffffff;
  text-decoration: none;
}

.events_btn:hover>i {
 color: #f9c70f;
}

.events_btn:active>i {
  color: #f9c70f;
}

.events_btn:link>span {
    color: #f9c70f;
}

.events_btn:visited>span {
  color: #ffffff;
  text-decoration: none;
}

.events_btn:hover>span {
 color: #f9c70f ;
}

.events_btn:active>span {
  color: #f9c70f;
}

<ul class="img-list"><li><img style="width: 100%; height: 100%;" src="http://www.sflsupport.org/wp-content/uploads/2016/06/Programs-11.jpg" /><div class="text-content"><div><h5 style="color: white; font-size: 38px; font-family: Montserrat; font-weight: 600; line-height: 42px; letter-spacing: 2px;">WEBINAR<br/>ARCHIVE</h5><hr style="border-top: 2px solid #ffffff; width: auto; margin: 10px 30px;"/>Throughout the years SFL has ammased the library of recorded webinars from some of the leading libertarian voices about numerous topics in philosophy, politics, and economics. How can the government fix the higher education bubble? What is Ayn Rand's theory of natural rights? Tune in to our videos for answers to these questions and many more.<br><a class="btn" style="color: white; text-align: center; margin-top: 10px; padding-top: 5px; padding-bottom: 5px; padding-left: 30px; padding-right: 30px; text-decoration: none; font-size: 24px; font-weight: 600; border: 3px solid white; letter-spacing: 2px;" href="http://www.google.com/" target="_blank">READ MORE</a></div></div></li></ul>

希望这能帮到您！

- Saurav Rastogi

---

是的，它也应该垂直居中。非常感谢您的额外努力！ :) - Ira

@Ira 非常荣幸能够帮到您！如果这个答案确实对您有所帮助，请也接受一下答案。 - Saurav Rastogi

Answer 3

/*Programs*/

ul.img-list {
  list-style-type: none;
  margin: 0;
  padding: 0;
  text-align: center;
}

ul.img-list li {
  display: inline-block;
  width: 100%;
  height: 100%;
  margin: 0;
  position: relative;
}

div.text-content {
  background: rgba(26,33,43,0.9);
  color: white;
  cursor: pointer;
  left: 0;
  position: absolute;
  top: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  font-size: 20px;
  font-family: Roboto;
  line-height: 24px;
  font-weight: 200;
  text-align: center;
  overflow-y: auto;
  padding-right: 25px;
  padding-left: 25px;
  padding-top: 25px;
  padding-bottom: 25px;
  box-sizing: border-box;
 -webkit-transition: opacity 500ms;
  -moz-transition: opacity 500ms;
  -o-transition: opacity 500ms;
  transition: opacity 500ms;
  overflow-y: auto;
}

div.text-content div {
  display: table-cell;
  text-align: center;
  vertical-align: middle;
  width: 100%;
  height: 100%;
}

ul.img-list li:hover div.text-content {
  opacity: 1;
}

/* Events page */

/*Event link button*/

.btn {
background-color: transparent;
border-radius: 42px;
border: 2px solid #ffffff;
display: inline-block;
cursor: pointer;
font-family: Roboto;
line-height: 28px;
font-size: 24px;
padding: 5px 15px 5px 15px;
margin-right: 45px;
margin-left: 45px;
}

.btn:link {
    color: #ffffff;
    text-decoration: none;
}

.btn:visited {
  color: #1b1c16;
  text-decoration: none;
}

.btn:hover {
  background-color: #ffffff;
  color: #1b1c16 !important;
}

.btn:active {
 position: relative;
 top: 1px;
}

/*All events button*/

.evens_btn {
background: ;
}

.events_btn>span{
color: #f9c70f;
font-family: Roboto;
color: #ffffff;
font-size: 24px !important;
background: ;
text-decoration: none !important;
padding: 10px 0px 10px 0px;
}

.events_btn>i{
color: #ffffff; 
margin-right: 15px; 
font-size: 50px;
}

.events_btn:link>i {
    color: #f9c70f;
}

.events_btn:visited>i {
  color: #ffffff;
  text-decoration: none;
}

.events_btn:hover>i {
 color: #f9c70f;
}

.events_btn:active>i {
  color: #f9c70f;
}

.events_btn:link>span {
    color: #f9c70f;
}

.events_btn:visited>span {
  color: #ffffff;
  text-decoration: none;
}

.events_btn:hover>span {
 color: #f9c70f ;
}

.events_btn:active>span {
  color: #f9c70f;
}

<ul class="img-list"><li><img style="width: 100%; height: 100%;" src="http://www.sflsupport.org/wp-content/uploads/2016/06/Programs-11.jpg" /><div class="text-content"><div><h5 style="color: white; font-size: 38px; font-family: Montserrat; font-weight: 600; line-height: 42px; letter-spacing: 2px;">WEBINAR<br/>ARCHIVE</h5><hr style="border-top: 2px solid #ffffff; width: auto; margin: 10px 30px;"/>Throughout the years SFL has ammased the library of recorded webinars from some of the leading libertarian voices about numerous topics in philosophy, politics, and economics. How can the government fix the higher education bubble? What is Ayn Rand's theory of natural rights? Tune in to our videos for answers to these questions and many more.<br><a class="btn" style="color: white; text-align: center; margin-top: 10px; padding-top: 5px; padding-bottom: 5px; padding-left: 30px; padding-right: 30px; text-decoration: none; font-size: 24px; font-weight: 600; border: 3px solid white; letter-spacing: 2px;" href="http://www.google.com/" target="_blank">READ MORE</a></div></div></li></ul>

- Suraj Pradhan

Answer 4

只需添加此CSS：

.text-content div{
height:1326px;
}

- sanjay