.opilsol-N15 {
  overflow: hidden;
  position: relative;
  padding-top: 0rem;
  padding-bottom: 10rem; width: 100%; float: left
}

.opilsol-N15 .col-group {

  width: 100%;display: grid;grid-template-columns:1fr 2fr ;
}

.opilsol-N15 .col-group .left,
.opilsol-N15 .col-group .right {

}

.opilsol-N15 .col-group .history-list li {
  position: relative;
  padding-left: 4.35rem;
  padding-bottom: 6rem;
  border-left: 1px solid var(--line-color1);
  transition: border-color 0.3s;
}

.opilsol-N15 .col-group .history-list li::before {
  content: url("../icons/ico_gray_circle.svg");
  position: absolute;
  left: -1.4rem;
  top: 0;
}

.opilsol-N15 .col-group .history-list li.active {
  position: relative;
  border-color: var(--primary);
}

.opilsol-N15 .col-group .history-list li.active::before {
  content: url("../icons/ico_red_circle.svg");
  position: absolute;
}

.opilsol-N15 .col-group .history-list li.active+li::before {
  content: url("../icons/ico_red_circle.svg");
  position: absolute;
}

.opilsol-N15 .col-group .history-list li .year {
  position: absolute;
  left: -8.5rem;
  top: 0;
  max-width: 10rem;
  text-align: right;
  font-weight: var(--fw-bold);
}

.opilsol-N15 .inner-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2.2rem 3rem;
}

.opilsol-N15 .inner-list+.inner-list {
  margin-top: 4.2rem;
}

.opilsol-N15 .inner-list dt {
  text-align: right;
  font-weight: var(--fw-bold);
}

.opilsol-N15 .inner-list dd {
  margin: 0;
  color: #767676;
}

@media (max-width: 992px) {
  .opilsol-N15 {
    padding-top: 6rem;
    padding-bottom: 6rem;
  }

  .opilsol-N15 .col-group {
    flex-direction: column;
  }

  .opilsol-N15 .col-group .history-tit {
    margin-bottom: 4rem;
  }

  .opilsol-N15 .col-group .right {
    padding-left: 6.6rem;
  }

  .opilsol-N15 .col-group .history-list li {
    padding-left: 2.75rem;
    padding-bottom: 4rem;
  }

  .opilsol-N15 .col-group .history-list li .year {
    left: -6.5rem; font-size: var(--tit-md-size);
    top: 0; 
  }

  .opilsol-N15 .inner-list {
    gap: 2.3rem 2rem;
  }

  .opilsol-N15 .inner-list+.inner-list {
    margin-top: 2rem;
  }
}



.tabset {width: 100%; float:left ; }
.tabset a{width: 100%;  float:left ; color: #666 }
.tabset a.active{width: 100%;  float:left ; color: var(--primary); }