#content_404 {
  text-align: center;
  margin: 30px 0 0;
}
.line_break {
  display: block;
}
.error_title {
  width: 100%;
  font-size: 150%;
  margin-bottom: 20px;
  margin-top: 20px;
  position: relative;
  line-height: 1.34;
  padding-left: 0;
}
.error_title:before {
  content: '';
  background: url(../img/logo.png) 0 0 no-repeat;
  -webkit-background-size: 57px 50px;
  background-size: 57px 50px;
  left: 0;
  right: 0;
  margin: 0 auto 10px;
  top: 0;
  display: block;
  -webkit-transform: none;
  -ms-transform: none;
  -o-transform: none;
  transform: none;
  position: static;
  width: 57px;
  height: 50px;
}
.des {
  font-size: 100%;
  padding-left: 0;
  font-weight: bold;
  line-height: 1.4;
}

.btn_top {
  margin-top: 20px;
}

.btn_top a {
  background: url(../img/btn-pagetop_sp_off.png) center no-repeat;
  display: inline-block;
  -webkit-background-size: 107px 50px;
  background-size: 107px 50px;
  height: 50px;
  width: 107px;
}
.btn_top a img {
  display: none;
}