body {
  margin: 0;
  padding: 0;
}

img {
  vertical-align: bottom;
}

/* -- header -- */
header {
  padding: 30px 0 15px;
  width: 100%;
  height: auto;
  background: repeat-x url(../images/header_bg.jpg);
  text-align: center;
}
header .tr_title{
  display: block;
  margin: 0;
  padding: 0;
}

/* -- trial_reading_contain -- */
.bg_warp{
  width: 100%;
  padding: 55px 0 70px;
  background: #fef9e3;
  border-top: solid 1px #e5e5e5;
}
.trial_reading_contain {
  width: 1000px;
  margin: 0 auto;
}

.text_cover {
  text-align: center;
}

.text_cover img {
  width: 50%;
  box-shadow: 0 0 7px #e3e1e1;
}

.text_spread {
  margin-bottom: 70px;
}

.text_spread img {
  width: 100%;
  box-shadow: 0 0 7px #e3e1e1;
}

.text_spread .page_num {
  display: flex;
  margin: 10px 0;
}

.text_spread .page_num p {
  width: 50%;
  text-align: center;
  margin: 0;
  color: #333;
}

.hide {
  visibility: hidden;
}

/* -- btn -- */
.btn_scroll {
  margin: 30px 0 80px;
  text-align: center;
}

.btn_scroll img {
  width: 64px;
}

.btn_close {
  text-align: center;
}

.btn_close a {
  display: block;
  margin: 0 auto;
  background: #9ac92a;
  width: 280px;
  height: 50px;
  text-align: center;
  line-height: 50px;
  text-decoration: none;
  color: #fff;
  font-size: 20px;
  border-radius: 25px;
}

.btn_close a:hover {
  opacity: 0.8;
}

#page-top {
  position: fixed;
  bottom: 40px;
  right: 40px;
}

#page-top img {
  width: 64px
}

#page-top a:hover {
  opacity: 0.8;
}

/* -- footer -- */
footer {
  width: 100%;
  height: 20px;
  background: repeat-x url(../images/footer_bg.jpg);
}

.p-n-reason__leading__balloon {
  margin: 0 0 10px;
}

.c-balloon {
  position: relative;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.c-balloon>span {
  color: #fff;
  position: relative;
  display: inline-block;
  padding: 6px 30px;
  border-radius: 34px;
  font-size: 16px;
  font-size: 1.6rem;
  font-weight: bold;
  background-color: #8fb2c5;
}

.c-balloon>span:after {
  top: 100%;
  left: 50%;
  border: solid transparent;
  content: " ";
  height: 0;
  width: 0;
  position: absolute;
  pointer-events: none;
  border-color: rgba(253, 53, 92, 0);
  border-top-color: #8fb2c5;
  border-width: 10px;
  margin-left: -10px;
}

em {
  font-size: 28px;
  font-size: 2.8rem;
  font-style: normal;
  font-weight: bold;
}

em span {
  font-size: 20px;
  font-size: 2.0rem;
  font-style: normal;
  font-weight: bold;
}

/* -- スマホcss 750px以下 -- */
@media only screen and (max-width: 750px) {
  .trial_reading_contain {
    width: 100%;
  }

.c-balloon>span{
  font-size: 10px;
  font-size: 1.0rem;
}

em {
  font-size: 16px;
  font-size: 1.6rem;
  font-style: normal;
  font-weight: bold;
}

em span {
  font-size: 12px;
  font-size: 1.2rem;
  font-style: normal;
  font-weight: bold;
}

  .text_spread {
    margin-bottom: 5vh;
  }

  #page-top {
    position: fixed;
    bottom: 20px;
    right: 5px;
  }

  #page-top img {
    width: 60%;
  }

  .btn_close a {
    width: 50%;
  }

  /* -- スマホ横css 767px以下 -- */
  @media (orientation: landscape) and (max-width: 767px) {
    .btn_scroll {
      margin: -15px 0 50px;
      text-align: center;
    }

    em {
      font-size: 16px;
      font-size: 1.6rem;
      font-style: normal;
      font-weight: bold;
    }

    em span {
      font-size: 12px;
      font-size: 1.2rem;
      font-style: normal;
      font-weight: bold;
    }

    .text_cover {
      margin: 0 auto;
      width: 70vw;
      height: 100vh;
    }


    .text_spread {
      margin: 0 auto;
      width: 70vw;
      height: 110vh;
    }



    .btn_close a {
      width: 30%;
    }
  }