* {
      box-sizing: border-box;
    }

    body {
      margin: 0;
    }

    .hieten-milestones {
      --green: #159941;
      --text: #111815;
      --muted: #59635d;
      --line: #858c88;

      padding: 76px 24px;
      background: #ffffff;
      color: var(--text);
      font-family: Arial, sans-serif;
    }

    .hieten-milestones__container {
      max-width: 1320px;
      margin: 0 auto;
    }

    .hieten-milestones__eyebrow {
      margin: 0 0 8px;
      color: var(--green);
      font-size: 13px;
      font-weight: 700;
      text-align: center;
    }

    .hieten-milestones h2 {
      width: 100%;
      max-width: 760px;
      margin: 0 auto 48px;
      padding: 0 12px;
      font-size: clamp(26px, 2.8vw, 36px);
      line-height: 1.25;
      text-align: center;
      text-transform: uppercase;
      white-space: normal;
      overflow-wrap: break-word;
      text-wrap: balance;
    }

    .hieten-milestones__list {
      position: relative;
      display: grid;
      grid-template-columns: repeat(6, minmax(0, 1fr));
      grid-template-rows: minmax(220px, 1fr) 2px minmax(220px, 1fr);
      column-gap: 30px;
      min-height: 500px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .hieten-milestones__list::before {
      position: absolute;
      top: 50%;
      right: 0;
      left: 0;
      z-index: 0;
      height: 2px;
      background: var(--line);
      content: "";
    }

    .hieten-milestone {
      position: relative;
      display: flex;
      justify-content: center;
      min-width: 0;
      min-height: 0;
    }

    /* 上下交错排列 */
    .hieten-milestone:nth-child(1) {
      grid-column: 1;
      grid-row: 1;
    }

    .hieten-milestone:nth-child(2) {
      grid-column: 2;
      grid-row: 3;
    }

    .hieten-milestone:nth-child(3) {
      grid-column: 3;
      grid-row: 1;
    }

    .hieten-milestone:nth-child(4) {
      grid-column: 4;
      grid-row: 3;
    }

    .hieten-milestone:nth-child(5) {
      grid-column: 5;
      grid-row: 1;
    }

    .hieten-milestone:nth-child(6) {
      grid-column: 6;
      grid-row: 3;
    }

    .hieten-milestone.is-top {
      align-items: flex-end;
      padding-bottom: 30px;
    }

    .hieten-milestone.is-bottom {
      align-items: flex-start;
      padding-top: 30px;
    }

    .hieten-milestone__content {
      position: relative;
      z-index: 1;
      width: min(100%, 205px);
      text-align: center;
    }

    .hieten-milestone::before {
      position: absolute;
      left: 50%;
      z-index: 1;
      width: 1px;
      height: 30px;
      background: #c7ccc9;
      content: "";
      transform: translateX(-50%);
    }

    .hieten-milestone.is-top::before {
      bottom: 0;
    }

    .hieten-milestone.is-bottom::before {
      top: 0;
    }

    .hieten-milestone::after {
      position: absolute;
      left: 50%;
      z-index: 2;
      width: 14px;
      height: 14px;
      border: 3px solid #ffffff;
      border-radius: 50%;
      content: "";
      transform: translateX(-50%);
    }

    .hieten-milestone.is-top::after {
      bottom: -8px;
    }

    .hieten-milestone.is-bottom::after {
      top: -8px;
    }

    .hieten-milestone:nth-child(1)::after {
      background: #159941;
      box-shadow: 0 0 0 1px #159941;
    }

    .hieten-milestone:nth-child(2)::after {
      background: #3195aa;
      box-shadow: 0 0 0 1px #3195aa;
    }

    .hieten-milestone:nth-child(3)::after {
      background: #e86783;
      box-shadow: 0 0 0 1px #e86783;
    }

    .hieten-milestone:nth-child(4)::after {
      background: #8064b5;
      box-shadow: 0 0 0 1px #8064b5;
    }

    .hieten-milestone:nth-child(5)::after {
      background: #ee872e;
      box-shadow: 0 0 0 1px #ee872e;
    }

    .hieten-milestone:nth-child(6)::after {
      background: #4d76bf;
      box-shadow: 0 0 0 1px #4d76bf;
    }

    .hieten-milestone__year {
      display: inline-flex;
      min-width: 112px;
      min-height: 50px;
      align-items: center;
      justify-content: center;
      margin-bottom: 13px;
      border-radius: 26px;
      color: #ffffff;
      font-size: 17px;
      font-weight: 700;
    }

    .hieten-milestone h3 {
      margin: 0 0 12px;
      font-size: 15px;
      line-height: 1.35;
    }

    .hieten-milestone p {
      margin: 0;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.55;
    }

    .year-green {
      background: #159941;
    }

    .year-teal {
      background: #3195aa;
    }

    .year-pink {
      background: #e86783;
    }

    .year-purple {
      background: #8064b5;
    }

    .year-orange {
      background: #ee872e;
    }

    .year-blue {
      background: #4d76bf;
    }

    @media (max-width: 1050px) {
      .hieten-milestones__list {
        column-gap: 16px;
      }

      .hieten-milestone__content {
        width: min(100%, 180px);
      }

      .hieten-milestone h3 {
        font-size: 14px;
      }

      .hieten-milestone p {
        font-size: 12px;
      }
    }

    @media (max-width: 760px) {
      .hieten-milestones {
        padding: 56px 20px;
      }

      .hieten-milestones h2 {
        max-width: 100%;
        margin-bottom: 40px;
        font-size: 29px;
      }

      .hieten-milestones__list {
        display: block;
        min-height: 0;
        padding-left: 28px;
      }

      .hieten-milestones__list::before {
        top: 0;
        right: auto;
        bottom: 0;
        left: 8px;
        width: 2px;
        height: auto;
      }

      .hieten-milestone,
      .hieten-milestone.is-top,
      .hieten-milestone.is-bottom {
        display: block;
        grid-column: auto !important;
        grid-row: auto !important;
        min-height: 0;
        padding: 0 0 38px;
      }

      .hieten-milestone:last-child {
        padding-bottom: 0;
      }

      .hieten-milestone::before {
        display: none;
      }

      .hieten-milestone::after,
      .hieten-milestone.is-top::after,
      .hieten-milestone.is-bottom::after {
        top: 18px;
        bottom: auto;
        left: -20px;
        width: 14px;
        height: 14px;
        transform: translate(-50%, -50%);
      }

      .hieten-milestone__content {
        width: auto;
        text-align: left;
      }

      .hieten-milestone__year {
        min-width: 96px;
        min-height: 42px;
        margin-bottom: 11px;
        font-size: 15px;
      }

      .hieten-milestone h3 {
        margin-bottom: 8px;
        font-size: 16px;
      }

      .hieten-milestone p {
        max-width: 560px;
        font-size: 14px;
      }
    }