.timeline {
              list-style: none;
              padding: 20px 0 20px;
              position: relative;
            }
            .timeline:before {
              top: 0;
              bottom: 0;
              position: absolute;
              content: "";
              width: 3px;
              background-color: #d9d9d9;
              margin-left: -1.5px;
              left: 20px;
            }
            @media (min-width: 576px) {
              .timeline:before {
                left: 50%;
              }
            }
            .timeline > li {
              margin-bottom: 20px;
              position: relative;
              padding-left: 55px;
            }
            .timeline > li:after, .timeline > li:after {
              content: "";
              display: table;
              clear: both;
            }
            .timeline > li .panel {
              width: 100%;
              float: left;
              border-radius: 3px;
              overflow: hidden;
              position: relative;
              background: #fff;
              box-shadow: 1px 2px 80px 0 rgba(0, 0, 0, 0.1);
            }
            .timeline > li .panel summary {
              display: block;
              user-select: none;
              outline: none;
              padding: 20px;
              margin-bottom: 0px;
              transition: all 600ms cubic-bezier(0.23, 1, 0.32, 1);
              transition-property: margin, background;
              font-weight: 500;
            }
            .timeline > li .panel summary::-webkit-details-marker {
              display: none;
            }
            .timeline > li .panel summary:hover {
              background: rgba(0, 0, 0, 0.1);
            }
            .timeline > li .panel p {
              padding: 0 20px 10px;
            }
            .timeline > li .panel[open] summary {
              margin-bottom: 20px;
              padding-bottom: 20px;
              border-bottom: 1px solid rgba(0, 0, 0, 0.1);
            }
            @media (min-width: 576px) {
              .timeline > li {
                padding-left: 0px;
              }
              .timeline > li .panel {
                width: 50%;
              }
              .timeline > li:not(:nth-child(even)) {
                padding-right: 90px;
              }
              .timeline > li:nth-child(even) {
                padding-left: 90px;
              }
              .timeline > li:nth-child(even) > :nth-child(even) {
                float: right;
              }
            }
            .timeline > li > .icon {
              color: var(--color-primary-1);
              width: 50px;
              height: 50px;
              line-height: 50px;
              font-size: 2.5em;
              text-align: center;
              position: absolute;
              left: 20px;
              margin-left: -25px;
              background-color: #fafafa;
              z-index: 999;
              border-radius: 50%;
            }
            @media (min-width: 576px) {
              .timeline > li > .icon {
                left: 50%;
              }
            }
            .timeline > li > .icon.done {
              color: var(--color-primary-1);
            }
            .timeline > li > .icon.working {
              color: var(--color-primary-1);
            }