.timeline ul li {
  list-style-type: none;
  position: relative;
  width: 6px;
  margin: 0 auto;
  padding-top: 50px;
  background: #262137;
}
.timeline ul li::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: inherit;
}

.timeline ul li div {
  position: relative;
  bottom: 0;
  width: 400px;
  padding: 15px;
  background: white;
  border: 1px solid black;
}

.timeline ul li div::before {
  content: "";
  position: absolute;
  bottom: 7px;
  width: 0;
  height: 0;
  border-style: solid;
}

.timeline ul li:nth-child(odd) div {
  left: 45px;
}

.timeline ul li:nth-child(odd) div::before {
  left: -15px;
  border-width: 8px 16px 8px 0;
  border-color: transparent black transparent transparent;
}

.timeline ul li:nth-child(even) div {
  left: -439px;
}

.timeline ul li:nth-child(even) div::before {
  right: -15px;
  border-width: 8px 0 8px 16px;
  border-color: transparent transparent transparent #262137;
}

.timeline ul li:after {
  background: rgb(174, 41, 41);
  transition: background 0.5s ease-in-out;
}

.timeline ul li.in-view::after {
  background: #262137;
}

.timeline ul li div {
  visibility: hidden;
  opacity: 0;
  transition: all 0.5s ease-in-out;
}

.timeline ul li:nth-child(even) div {
  transform: translate3d(-200px, 0, 0);
}

.timeline ul li.in-view div {
  transform: none;
  visibility: visible;
  opacity: 1;
}

@media screen and (max-width: 900px) {
  .timeline ul li div {
    width: 250px;
  }

  .timeline ul li:nth-child(even) div {
    left: -289px; /*250+45-6*/
  }

  .imagentimeline{
    max-width: 365px;
  }
}

@media screen and (max-width: 600px) {
  .timeline ul li {
    margin-left: 20px;
  }

  .timeline ul li div {
    width: calc(100vw - 108px);
  }

  .timeline ul li:nth-child(even) div {
    left: 45px;
  }

  .timeline ul li:nth-child(even) div::before {
    left: -15px;
    border-width: 8px 16px 8px 0;
    border-color: transparent #262137 transparent transparent;
  }

  .imagentimeline{
    max-width: 170px;
  }

}