.overview-content .nav-bar {
  font-size: 16px;
  position: fixed;
  left: 0;
  top: 45%;
  z-index: 9;
}

.overview-content .nav-bar li {
  font-weight: 400;
  font-size: 1em;
  color: #1d2529;
  line-height: 1;
  padding: 0.5em 0;
  cursor: pointer;
  display: flex;
  flex-direction: row;
  justify-content: start;
  align-items: center;
}

.overview-content .nav-bar li span {
  opacity: 0;
  text-align: center;
  transition: all 300ms cubic-bezier(0.64, 0.04, 0.35, 1);
  font-size: 1.125em;
  background-color: #f5f7fa;
  border-radius: 0px 10px 10px 0px;
  height: 60px;
  line-height: 60px;
  padding: 0 2em;
}

.overview-content .nav-bar li.active span,
.overview-content .nav-bar li:hover span {
  opacity: 1;
}

.overview-content .nav-bar li.active .line,
.overview-content .nav-bar li:hover .line {
  background-color: #4acbd6;
  width: 4px;
  border-radius: 0;
}

.overview-content .nav-bar .line {
  display: inline-block;
  width: 15px;
  margin-right: 0px;
  height: 60px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 0px 10px 10px 0px;
  transition: all 300ms cubic-bezier(0.64, 0.04, 0.35, 1);
}

@media (max-width: 1680px) {
  .overview-content .nav-bar {
    font-size: 14px;
  }
}

@media (max-width: 1440px) {
  .overview-content .nav-bar {
    font-size: 12px;
  }
}

@media (max-width: 1024px) {
  .overview-content .nav-bar {
    font-size: 10px;
  }
}

@media (max-width: 736px) {
  .overview-content .nav-bar {
    font-size: 10.35px;
    display: none;
  }
}

@media (max-width: 414px) {
  .overview-content .nav-bar {
    font-size: 2.5vw;
    display: none;
  }
}