.background-intro {
  background-image: url(../img/background-intro.png);
  background-size: 100% 100%;
}
.background-aboutus {
  background-image: url(../img/background-aboutus.jpg);
  background-size: 100% 100%;
  height: 680px;
}
.background-team {
  background-image: url(../img/background-team.png);
  height: 984px;
  background-size: 100% 100%;
}
.core-value-01 {
  background-image: url(../img/core-value-1.jpg);
  height: 131px;
  width: 340px;
  font-size: 32px;
  font-weight: 400;
  vertical-align: middle;
}
.core-value-02 {
  background-image: url(../img/core-value-2.jpg);
  height: 131px;
  width: 340px;
  font-size: 32px;
  font-weight: 400;
  vertical-align: middle;
}
.core-value-03 {
  background-image: url(../img/core-value-3.jpg);
  height: 131px;
  width: 340px;
  font-size: 32px;
  font-weight: 400;
  vertical-align: middle;
}

.event-img-viewer {
  overflow: hidden;
  height: 270px;
  width: 340px;
  margin-bottom: 18px;
}

#album span.carousel-control-prev-icon {
  background-image: url(../img/icons/left.svg);
  color: #a9a9a9;
}

#album span.carousel-control-next-icon {
  background-image: url(../img/icons/right.svg);
  color: #a9a9a9;
}

.member-talk {
  color: rgb(51, 51, 51);
  font-size: 14px;
  font-weight: 400;
}

.background-history {
  background-image: url(../img/background-history.jpg);
  background-size: 100% 100%;
  height: 1100px;
}



.history-box {
  list-style: none;
}
.history-box li {
  float: left;
  width: 50%;
  padding-right: 90px;
  position: relative;
  height: 115px;
}
.history-box li:nth-child(2n+1) {
  clear: both;
}
.history-box li:nth-child(2n) {
  margin-top: 20px;
  float: right;
  padding-left: 80px;
  padding-right: 0;
}
.history-box li .item:before {
  position: absolute;
  top: 42px;
  right: -60px;
  content: "";
  width: 60px;
  height: 115px;
  background: url(../img/icons/triangle.svg);
  background-repeat: no-repeat;
}
.history-box li:nth-child(2n) .item:before {
  left: -60px;
  right: auto;
  top: -50px;
  transform: rotate(180deg);
  background: url(../img/icons/triangle.svg);
  background-repeat: no-repeat;
}
.history-box li .item {
  text-align: left;
  background: #FFFFFF;
  border-radius: 5px;
  padding: 15px 30px;
  position: relative;
  height: 100%;
}
.history-box li .circle {
  position: absolute;
  top: 45px;
  right: -7px;
  display: inline-block;
  font-size: 0;
  padding: 5px;
  background: #fff;
  border: 2px solid #4fd582;
  border-radius: 50%;
}
.history-box li:nth-child(2n) .circle {
  left: -7px;
  right: auto;
}
.history-box:before {
  content: "";
  position: absolute;
  left: 50%;
  width: 1px;
  height: 100%;
  background: #FFFFFF;
  opacity: .3;
}
.history-box:after {
  clear: both;
  display: block;
  height: 0;
  visibility: hidden;
  line-height: 0;
  content: '\20';
}