画像スライダー(Swiper)にて半分を固定にする方法

Swiperにて下記のようなスライダーを作りたいと考えています。
http://idangero.us/swiper/

参考にしたソースは以下のとおりです。

<!DOCTYPE html>
<html lang="ja">
<head>
  <meta charset="utf-8">
  <title>Swiper デモ</title>
  <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1">

  <!-- Link Swiper's CSS -->
  <link rel="stylesheet" href="../dist/css/swiper.min.css">

  <!-- Demo styles -->
  <style>
    html, body {
      position: relative;
      height: 100%;
    }
    body {
      background: #eee;
      font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
      font-size: 14px;
      color:#000;
      margin: 0;
      padding: 0;
    }
    .swiper-container {
      width: 100%;
      height: 100%;
      background: #000;
    }
    .swiper-slide {
      font-size: 18px;
      color:#fff;
      -webkit-box-sizing: border-box;
      box-sizing: border-box;
      padding: 40px 60px;
    }
    .parallax-bg {
      position: absolute;
      left: 0;
      top: 0;
      width: 130%;
      height: 100%;
      -webkit-background-size: cover;
      background-size: cover;
      background-position: center;
    }
    .swiper-slide .title {
      font-size: 41px;
      font-weight: 300;
    }
    .swiper-slide .subtitle {
      font-size: 21px;
    }
    .swiper-slide .text {
      font-size: 14px;
      max-width: 400px;
      line-height: 1.3;
    }
  </style>
</head>
<body>
  <!-- Swiper -->
  <div class="swiper-container">
    <div class="parallax-bg" style="background-image:url(http://lorempixel.com/900/600/nightlife/2/)" data-swiper-parallax="-23%"></div>
    <div class="swiper-wrapper">
      <div class="swiper-slide">
        <div class="title" data-swiper-parallax="-300">Slide 1</div>
        <div class="subtitle" data-swiper-parallax="-200">Subtitle</div>
        <div class="text" data-swiper-parallax="-100">
          <p>ほげほげ</p>
        </div>
      </div>
      <div class="swiper-slide">
        <div class="title" data-swiper-parallax="-300" data-swiper-parallax-opacity="0">Slide 2</div>
        <div class="subtitle" data-swiper-parallax="-200">Subtitle</div>
        <div class="text" data-swiper-parallax="-100">
          <p>ほげほげ</p>
        </div>
      </div>
      <div class="swiper-slide">
        <div class="title" data-swiper-parallax="-300">Slide 3</div>
        <div class="subtitle" data-swiper-parallax="-200">Subtitle</div>
        <div class="text" data-swiper-parallax="-100">
          <p>ほげほげ</p>
        </div>
      </div>
    </div>
    <!-- Add Pagination -->
    <div class="swiper-pagination swiper-pagination-white"></div>
    <!-- Add Navigation -->
    <div class="swiper-button-prev swiper-button-white"></div>
    <div class="swiper-button-next swiper-button-white"></div>
  </div>

  <!-- Swiper JS -->
  <script src="../dist/js/swiper.min.js"></script>

  <!-- Initialize Swiper -->
  <script>
    var swiper = new Swiper('.swiper-container', {
      speed: 600,
      parallax: true,
      pagination: {
        el: '.swiper-pagination',
        clickable: true,
      },
      navigation: {
        nextEl: '.swiper-button-next',
        prevEl: '.swiper-button-prev',
      },
    });
  </script>
</body>
</html>