.top-concept {
  padding: 85px 0;
}

.top-concept__content {
  position: relative;
  z-index: 1;
  padding: 52px 60px;
  /* border: 1px solid #707070; */
  background: #eef0f3;
}

.top-concept__content:before {
  position: absolute;
  top: 0;
  left: 50%;
  z-index: -1;
  transform: translateX(-50%);
  color: rgba(112, 112, 112, .3);
  font-family: 'Source Sans 3', sans-serif;
  font-size: 100px;
  white-space: nowrap;
  letter-spacing: 0;
  content: 'TANAKA RENTAL ROOM.';
}

.top-concept__title {
  width: 100%;
  margin-bottom: 25px;
  /*white-space: nowrap;*/
  color: #000;
  font-size: 26px;
  text-align: center;
  line-height: 1.73;
  letter-spacing: 0.1em;
}

.top-concept__title span {
  display: inline-block; /* 下線 */
}

.top-concept__lead {
  margin-bottom: 25px;
  color: #000;
  font-weight: 700;
  text-align: center;
}

.top-concept__text {
  color: #000;
}

.inner {
  width: min(100%, 1131px);
  margin: 0 auto;
  padding: 0 28px;
}

/*S 下線アニメーション S*/
.youtube-underline {
  position: relative;
  display: inline-block;
  text-decoration: none;
  color: #222;
  font-weight: bold;
}

.youtube-underline::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background-color: #ff0000; /* YouTubeの赤 */
  transition: width 0.3s ease;
}

.youtube-underline:hover::after {
  width: 100%;
}
/*E 下線アニメーション E*/


@media screen and (max-width: 767px) {

  .top-concept {
    padding: 20px;
    background: #eef0f3;
  }

  .top-concept__content {
    padding: 0;
    border: none;
  }

  .top-concept__content:before {
    top: -30px;
    font-size: 38px;
  }

  .top-concept__title {
    margin-bottom: 24px;
    font-size: 20px;
    text-align: left;
    color:#000;
  }

  .top-concept__lead {
    font-size: 14px;
    text-align: left;
    line-height: 1.86;
    letter-spacing: 0.1em;
    color:#000;
  }

  .top-concept__text {
    font-size: 14px;
    line-height: 1.86;
    letter-spacing: 0.1em;
    color:#000;
  }

}