.mark {
  display: inline;
  position: relative;
}
.mark:after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: -4px;
  z-index: -1;
  background: -webkit-gradient(linear, left top, left bottom, color-stop(60%, transparent), color-stop(60%, #F6EFDC));
  background: linear-gradient(transparent 60%, #F6EFDC 60%);
  background-size: 0 100%;
  background-repeat: no-repeat;
  -webkit-transition: background-size 1.5s;
  transition: background-size 1.5s;
}
.mark[style*="visibility: visible"]:after {
  background-size: 100% 100%;
}

#header {
  margin-bottom: 131px;
}

#sec1 .title {
  margin: 0 0 120px;
  text-align: center;
}
#sec1 .title small {
  letter-spacing: 0;
}
#sec1 .inner {
  max-width: 920px;
  margin: 0 auto;
}
#sec1 .item + .item {
  margin-top: 125px;
}
#sec1 .item h3 {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  font-size: 21px;
  line-height: 36px;
  margin: 0 0 64px;
}
#sec1 .item h3 .stt {
  font-size: 50px;
  color: #DACA99;
  margin-right: 15px;
}
#sec1 .item .flex {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: end;
      -ms-flex-pack: end;
          justify-content: flex-end;
}
#sec1 .item .flex .right {
  width: 460px;
  margin: 0 0 0 40px;
  max-width: 53%;
}
#sec1 .item .flex .right .txt {
  line-height: 23px;
  letter-spacing: -0.01em;
}
#sec1 .item .flex .right .txt + .txt {
  margin-top: 23px;
}
#sec1 .item .flex .img {
  width: 400px;
  max-width: 44.5%;
  -webkit-box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.3);
          box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.3);
}
#sec1 #footer {
  padding-top: 161px;
}

@media screen and (max-width: 767px) {
  #header {
    margin-bottom: 100px;
  }

  #sec1 .title {
    margin-bottom: 50px;
  }

  #sec1 .item h3 {
    margin-bottom: 40px;
  }

  #sec1 .item .flex {
    display: block;
  }

  #sec1 .item .flex .img {
    width: 100%;
    max-width: 100%;
  }

  #sec1 .item .flex .right {
    max-width: 100%;
    width: 100%;
    margin: 30px 0 0;
  }
}