HTML内容层叠在彼此之上

Question

我添加了一些翻转动画（javascirpt）到我的图像网格。这需要我添加一些额外的CSS来设置“后退”div。图像网格现在位于div.instagram元素后面和页脚元素前面。当响应所有divs层在彼此顶部时。

$(document).ready(function() {
  $(".success").hide();
  $("form").submit(function(e) {
    e.preventDefault();
    $("#wanttoplay").hide();
    $(".success").show();
  });

  $(".successcollab").hide();
  $("form").submit(function(e) {
    e.preventDefault();
    $("#collaborate").hide();
    $(".successcollab").show();


  });

  $(document).on("click", ".flip-container", function() {
    $(this).toggleClass('hover');
  });
});

@font-face {
  font-family: Geomanist-Regular;
  src: url('fonts/Geomanist-Regular.otf');
}

@font-face {
  font-family: Geomanist-Bold;
  src: url('fonts/Geomanist-Bold.otf');
}

#header {
  background-color: #000;
  margin-bottom: 70px;
}

#header a {
  color: #fff;
  transition: color 0.5s;
  font-family: 'Geomanist-Bold', helvetica, sans-serif;
}

#header a span {
  color: #ffffff;
  border-bottom: 2px solid;
  padding-bottom: 10px;
  border-color: transparent;
  transition: border-bottom 0.5s;
}

#header a span:hover {
  color: #7ed321;
  border-color: #7ed321;
}

#header .selected a span {
  color: #7ED321;
}

#header img {
  width: 40px;
  margin-right: 10px;
  display: inline-block;
  vertical-align: top;
  margin-top: -15px;
}

#header li {
  margin-left: 30px;
  font-size: 20px;
}

.navbar {
  padding-top: 25px;
  padding-bottom: 20px;
}

.navbar-header a {
  font-family: 'Geomanist-Bold', helvetica, sans-serif;
}

.navbar-brand {
  font-size: 30px;
  font-family: 'Geomanist-Bold', helvetica, sans-serif;
  border-bottom: none;
}

.navbar-inverse {
  background-color: #000000;
}

.bottom {
  padding-bottom: 20px;
}

.homepage-main {
  min-height: 570px;
  background-image: url('/images/mainimage.jpg');
  background-repeat: no-repeat;
  border-radius: 0px;
  margin-bottom: 40px;
}

.vertical-text-main {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -25%);
}

.wheredoweplay {
  padding-top: 30px;
  padding-bottom: 20px;
}

.wanttocollaborate {
  padding-top: 30px;
}

.wanttoplay {
  padding-top: 30px;
  padding-bottom: 20px;
}

.instagram {
  padding-top: 20px;
  padding-bottom: 40px;
}

.instagram h2 {
  padding-bottom: 20px;
}

.container2 {
  position: relative;
  filter: grayscale(0%);
  transition: filter 1s;
}

.container2:hover {
  filter: grayscale(100%);
}

.center {
  position: absolute;
  left: 0;
  top: 88%;
  width: 100%;
  color: #ffffff;
  text-align: center;
  font-size: 18px;
  transition: color 1s;
}

.center:hover {
  cursor: pointer;
  color: #7ED321;
}

h3.centersmall {
  position: absolute;
  left: 0;
  top: 76%;
  width: 100%;
  color: #ffffff;
  text-align: center;
  font-size: 18px;
  transition: color 1s;
}

h3.centersmall:hover {
  cursor: pointer;
  color: #7ED321;
}

img.playerpics {
  width: 100%;
  height: auto;
  margin-bottom: 30px;
}

.alextext {
  background-color: #000000;
  margin-bottom: 30px;
  color: #ffffff;
  text-align: center;
  padding-top: 30%;
  padding-bottom: 23.5%;
  padding-left: 30px;
  padding-right: 30px;
}

.readmore {
  cursor: pointer;
}

img.theclubpics {
  margin-top: 20px;
}

div.vertical-container {
  height: 570px;
  position: relative;
}

div.vertical-text-para {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -60%);
}

form.formpadding {
  padding-top: 20px;
}

.formmaxwidth input {
  max-width: 400px;
  display: inline-block;
}

textarea.form-control {
  height: auto;
  color: #000;
  display: inline-block;
  max-width: 400px;
  border-color: #eee;
  border-radius: 0px;
  padding-top: 15px;
  padding-left: 20px;
  padding-bottom: 15px;
}

.form-control:focus {
  border-color: #7DC42E;
  box-shadow: none;
}

ul.navtheclub li {
  font-family: 'Geomanist-Bold', helvetica, sans-serif;
  font-size: 18px;
  display: inline-block;
  padding-right: 40px;
  padding-top: 40px;
}

.breadcrumb .active {
  color: #000000;
}

.textcenter {
  text-align: center;
}

.signoff p {
  font-family: 'Geomanist-Bold', helvetica, sans-serif;
}

.caption p {
  font-family: 'Geomanist-Bold', helvetica, sans-serif;
  font-size: 13px;
  font-weight: 400;
  color: #999;
}

ol.breadcrumb {
  background-color: #ffffff;
  font-family: 'Geomanist-Bold', helvetica, sans-serif;
  font-size: 13px;
  padding-left: 0px;
}

h1 {
  font-family: 'Geomanist-Bold', helvetica, sans-serif;
  font-size: 50px;
}

h2 {
  font-family: 'Geomanist-Bold', helvetica, sans-serif;
  font-size: 32px;
  padding-top: 20px;
}

body {
  font-family: 'Geomanist-Bold', helvetica, sans-serif;
  padding-top: 70px;
  color: #000;
}

p {
  font-family: 'Geomanist-Regular', helvetica, sans-serif;
  font-size: 18px;
  line-height: 28px;
}

.smalltext {
  font-size: 11px;
}

a.link {
  color: #CBCBCB;
  font-family: 'Geomanist-Bold', helvetica, sans-serif;
  transition: color 0.5s;
  border-bottom: 2px solid;
  border-color: transparent;
  transition: border-bottom 0.5s;
}

a.link:hover {
  color: #7ED321;
  text-decoration: none;
  border-color: #7ed321;
}

button.enterDetails {
  font-family: 'Geomanist-Bold', helvetica, sans-serif;
  font-size: 16px;
  border-radius: 0px;
  background-color: #7ED321;
  vertical-align: middle;
  border: 0px;
  min-width: 190px;
  height: 48px;
  transition: background-color 0.5s;
}

button.enterDetails:hover {
  background-color: #7DC42E;
}

button.enterDetails:focus {
  outline: 0;
}

button.enterDetails img {
  padding-left: 3px;
  transform: translate(0px, 0);
  transition: all 0.5s;
}

button.enterDetails:hover img {
  transform: translate(10px, 0);
}

.form-group input {
  font-family: 'Geomanist-Regular', helvetica, sans-serif;
  border: 1px solid #eee;
  color: #000;
  height: 48px;
  padding: 0 20px;
  min-width: 240px;
  border-radius: 0px;
}

textarea {
  font-family: 'Geomanist-Regular', helvetica, sans-serif;
  border: 1px solid #eee;
  color: #000;
  height: 48px;
  padding: 0 20px;
  min-width: 240px;
  border-radius: 0px;
}

input.form-control:focus {
  border-color: #7DC42E;
  box-shadow: none;
}

input#formGroupExampleInput {
  padding-bottom: 48px;
}

.btn-secondary {
  padding-left: 10px;
}

.btn-secondary img {
  padding-left: 5px;
  cursor: pointer;
  transform: translate(0px, 0);
  transition: all 0.5s;
}

.btn-secondary:hover img {
  transform: translate(10px, 0);
}

.btn-secondary a {
  color: #000000;
  border-bottom: none;
  font-size: 16px;
  transition: color 0.5s;
  text-decoration: none;
}

.btn-secondary a:hover {
  color: #7DC42E;
}

.success {
  padding-top: 60px;
  padding-bottom: 60px;
}

.successcollab {
  padding-top: 60px;
  padding-bottom: 60px;
}

.left-image {
  min-height: 570px;
  background-image: url('../images/nextmatch_image.jpg');
  background-repeat: no-repeat;
  padding-bottom: 40px;
}

.right-image {
  min-height: 570px;
  background-image: url('../images/theplayers_image.jpg');
  background-repeat: no-repeat;
  margin-bottom: 40px;
}

#homepage-title {
  color: #ffffff;
}

p.shaded {
  color: #ffffff;
  position: absolute;
  bottom: 0;
  width: 100%;
  text-align: center;
  top: 400px;
  padding-right: 40px;
}

p#second-para {
  color: #ffffff;
  position: absolute;
  bottom: 0;
  width: 100%;
  text-align: center;
  top: 450px;
  padding-right: 40px;
}

h2#white-text {
  color: #ffffff;
  position: absolute;
  bottom: 0;
  width: 100%;
  text-align: center;
  top: 410px;
  padding-right: 40px;
}

.vertical-text-main.white {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -25%);
  color: #ffffff;
  text-align: center;
  bottom: -350px;
}

.vertical-text-para h2 {
  margin-top: 0px;
}

a.homepage-top-link-white {
  color: #ffffff;
  position: absolute;
  bottom: 0;
  width: 100%;
  text-align: center;
  top: 500px;
  padding-right: 40px;
}

a.homepage-top-link {
  color: #ffffff;
}

.white-margin {
  margin-left: 0px;
}

#formGroupExampleInput {
  min-height: 100px;
}

#footer {
  background-color: #000000;
  color: #ffffff;
  font-family: 'Geomanist-Regular', helvetica, sans-serif;
  margin: 0px;
  padding-top: 30px;
  padding-bottom: 30px;
  text-align: center;
}

#footer p {
  font-size: 13px;
}

.dividers {
  padding-top: 10px;
}

#footer img {
  padding-right: 15px;
  padding-left: 15px;
  color: #ffffff;
  opacity: 1;
  transition: opacity 0.5s;
}

#footer img:hover {
  opacity: 0.5;
}

.right {
  float: right;
}

.flip-container {
  perspective: 1000px;
}

.flip-container.hover .flipper {
  transform: rotateY(180deg);
}

.flipper {
  transition: 0.6s;
  transform-style: preserve-3d;
  position: relative;
}

.front,
.back {
  backface-visibility: hidden;
  position: absolute;
  top: 0;
  left: 0;
}

.front {
  z-index: 2;
  transform: rotateY(0deg);
}

.back {
  transform: rotateY(180deg);
  background-color: #000000;
  color: #ffffff;
  width: 360px;
  height: 371px;
  padding: 100px 20px 0px 20px;
  text-align: center;
  box-sizing: border-box;
}

@media (max-width: 1199px) {
  .back {
    display: block;
    max-width: 100%;
    height: 300px;
    padding: 50px 20px 0px 20px;
    box-sizing: border-box;
  }
}

@media (max-width: 991px) {
  #header li {
    margin-left: 0px;
    font-size: 18px;
  }
  .back {
    display: block;
    max-width: 100%;
    height: 227px;
    padding: 50px 20px 0px 20px;
    box-sizing: border-box;
    font-size: 18px;
  }
  .center {
    top: 84%;
  }
  h3.centersmall {
    position: absolute;
    left: 0;
    top: 69%;
    width: 100%;
    color: #ffffff;
    text-align: center;
    font-size: 16px;
    transition: color 1s;
    padding-top: -10px;
  }
  p.playerstats {
    font-size: 16px;
    line-height: 24px;
  }
}

@media (max-width: 767px) {
  .center {
    top: 91%;
    font-size: 24px;
  }
  h3.centersmall {
    position: absolute;
    left: 0;
    top: 82%;
    width: 100%;
    color: #ffffff;
    text-align: center;
    font-size: 24px;
    transition: color 1s;
    padding-top: -10px;
  }
  .form-group input {
    margin-bottom: 20px;
  }
  .flip-container {
    perspective: 1000px;
  }
  .flip-container.hover .flipper {
    transform: rotateY(180deg);
  }
  .flipper {
    transition: 0.6s;
    transform-style: preserve-3d;
    position: relative;
  }
  .front,
  .back {
    backface-visibility: hidden;
    position: absolute;
    top: 0;
    left: 0;
  }
  .front {
    z-index: 2;
    transform: rotateY(0deg);
    width: 100%;
    margin-bottom: 30px;
  }
  .back {
    transform: rotateY(180deg);
    background-color: #000000;
    color: #ffffff;
    width: 737px;
    height: 600px;
    margin-bottom: 30px;
    padding: 100px 40px 0px 40px;
    text-align: center;
    box-sizing: border-box;
  }
  p.playerstats {
    font-size: 18px;
    line-height: 32px;
    padding-right: 40px;
    padding-left: 40px;
  }
}

@media (max-width: 400px) {
  .left-image {
    min-height: 570px;
    background-image: url(../images/nextmatch_image.jpg);
    background-repeat: no-repeat;
    padding-bottom: 40px;
    margin-right: 15px;
  }
  .right-image {
    min-height: 570px;
    background-image: url(../images/theplayers_image.jpg);
    background-repeat: no-repeat;
    margin-bottom: 40px;
    margin-right: 15px;
    margin-top: 40px;
  }
  .homepage-main {
    min-height: 400px;
    background-image: url(/images/mainimage.jpg);
    background-repeat: no-repeat;
    border-radius: 0px;
    margin-bottom: 40px;
  }
  .form-club {
    margin-bottom: 10px;
  }
  .form-group {
    margin-bottom: 0px;
  }
  textarea.form-control {
    margin-bottom: 10px;
  }
  button.enterDetails {
    width: 100%;
  }
  .form-group input {
    margin-bottom: 20px;
  }
  .flip-container {
    perspective: 1000px;
    margin-bottom: 100px;
  }
  .flip-container.hover .flipper {
    transform: rotateY(180deg);
  }
  .flipper {
    transition: 0.6s;
    transform-style: preserve-3d;
    position: relative;
  }
  .front,
  .back {
    backface-visibility: hidden;
    position: absolute;
    top: 0;
    left: 0;
  }
  .front {
    transform: rotateY(0deg);
    width: 370px;
    height: 382px;
    margin-bottom: 30px;
  }
  .back {
    transform: rotateY(180deg);
    background-color: #000000;
    color: #ffffff;
    width: 370px;
    height: 382px;
    margin-bottom: 30px;
    padding: 100px 20px 0px 20px;
    text-align: center;
    box-sizing: border-box;
  }
  h3.centersmall {
    position: absolute;
    left: 0;
    top: 83%;
    width: 100%;
    color: #ffffff;
    text-align: center;
    font-size: 18px;
    transition: color 1s;
    padding-top: -10px;
  }
  .center {
    top: 88%;
    font-size: 18px;
  }
  img.playerpiclast {
    margin-bottom: 400px;
  }
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!DOCTYPE html>
<html lang="en">

<head>
  <link rel="icon" href="/images/favicon.png" sizes="16x16 32x32" type="image/png">
  <title>The players</title>
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
  <link rel="stylesheet" type="text/css" href="/css/website-css.css">
  <script src="/js/jquery.min.js"></script>
  <script src="/js/picklesfc.js"></script>

</head>

<body>

  <header id="header">
    <nav class="navbar navbar-inverse navbar-fixed-top">
      <div class="container">
        <div class="navbar-header">
          <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
            			<span class="sr-only">Toggle navigation</span>
            			<span class="icon-bar"></span>
            			<span class="icon-bar"></span>
            			<span class="icon-bar"></span>
          			</button>
          <a class="navbar-brand" href="/homepage/"><img src="/images/logo.svg" alt="Pickles FC logo">Pickles FC</a>
        </div>
        <div id="navbar" class="collapse navbar-collapse">
          <ul class="nav navbar-nav">
            <li><a href="/theclub/"><span>The Club</span></a></li>
            <li class="selected"><a href="/theplayers/"><span>The Players</span></a></li>
            <li><a href="http://picklesmagazine.co.uk/shop/" target="_blank"><span>The Shop</span></a></li>
            <li><a href="/collaborations/"><span>Collaborations</span></a></li>
          </ul>
        </div>
      </div>
    </nav>
  </header>


  <div class="container">
    <div class="theplayers row">
      <div class='container2 col-sm-8'>
        <h3 class="center">Alex Stewart</h3>
        <image src="/images/mainprofile_image.jpg" alt="mainprofile_image2.jpg" class="playerpics img-responsive">
      </div>


      <div class="container2 col-sm-4 flip-container" ontouchstart="this.classList.toggle('hover');">
        <div class="flipper">
          <div class="front ">
            <h3 class="centersmall">Alex Stewart</h3>
            <image src="/images/profile_image2.jpg" alt="profile_image2.jpg" class="readmore playerpics img-responsive center-block">
          </div>
          <div class="back">
            <p class='playerstats'>Some stats about Alex to go in here. His dad Alastair Stewart is a famous news reader. Alex Stewart plays in goal.</p>
          </div>
        </div>
      </div>

      <div class="container2 col-sm-4 flip-container" ontouchstart="this.classList.toggle('hover');">
        <div class="flipper">
          <div class="front ">
            <h3 class="centersmall">Alex Stewart</h3>
            <image src="/images/profile_image2.jpg" alt="profile_image2.jpg" class="readmore playerpics img-responsive center-block">
          </div>
          <div class="back">
            <p class='playerstats'>Some stats about Alex to go in here. His dad Alastair Stewart is a famous news reader. Alex Stewart plays in goal.</p>
          </div>
        </div>
      </div>
    </div>



    <div class="row playpicpadding">
      <div class="container2 col-sm-4 flip-container" ontouchstart="this.classList.toggle('hover');">
        <div class="flipper">
          <div class="front">
            <h3 class="centersmall">Alex Stewart</h3>
            <image src="/images/profile_image2.jpg" alt="profile_image2.jpg" class="readmore playerpics img-responsive center-block">
          </div>
          <div class="back">
            <p class='playerstats'>Some stats about Alex to go in here. His dad Alastair Stewart is a famous news reader. Alex Stewart plays in goal.</p>
          </div>
        </div>
      </div>

      <div class="container2 col-sm-4 flip-container" ontouchstart="this.classList.toggle('hover');">
        <div class="flipper">
          <div class="front ">
            <h3 class="centersmall">Alex Stewart</h3>
            <image src="/images/profile_image2.jpg" alt="profile_image2.jpg" class="readmore playerpics img-responsive center-block">
          </div>
          <div class="back">
            <p class='playerstats'>Some stats about Alex to go in here. His dad Alastair Stewart is a famous news reader. Alex Stewart plays in goal.</p>
          </div>
        </div>
      </div>



      <div class="container2 col-sm-4 flip-container" ontouchstart="this.classList.toggle('hover');">
        <div class="flipper">
          <div class="front ">
            <h3 class="centersmall">Alex Stewart</h3>
            <image src="/images/profile_image2.jpg" alt="profile_image2.jpg" class="readmore playerpics img-responsive center-block">
          </div>
          <div class="back">
            <p class='playerstats'>Some stats about Alex to go in here. His dad Alastair Stewart is a famous news reader. Alex Stewart plays in goal.</p>
          </div>
        </div>
      </div>

    </div>

    <div class="instagram">
      <h2 class="text-center">#picklesmagazine</h2>
      <script src="//apps.elfsight.com/p/platform.js" defer></script>
      <div class="elfsight-app-276db0d4-25a2-4a5e-8a72-30da22fe3732"></div>
    </div>

  </div>





</body>

<footer id="footer">
  <p>© 2017 Pickles Magazine | Football, Design and Wit</p>
  <a href="https://www.facebook.com/picklesmagazine/" target="_blank"><img src="/images/facebook.svg" height="25"></a>
  <a href="https://twitter.com/picklesmagazine" target="_blank"><img src="/images/twitter.svg" height="25"></a>
  <a href="https://www.instagram.com/picklesmagazine/" target="_blank"><img src="/images/instagram.svg" height="25"></a>
</footer>

<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>

</html>