.nav-box {
    /* position: fixed; */
    /* left: 50%; */
    /* transform: translateX(-50%); */
    /* bottom: 0; */
    display: flex;
    align-items: center;
    justify-content: space-around;
    width: 100%;
    /* max-width: 420px; */
    color: #666;
    background-color: #fff;
    border-top: 1px solid #eee;
    z-index: 999;
    box-shadow: 0 10px 15px 5px rgba(45, 56, 66, 0.12);
  }
  .nav-box ul {
    display: flex;
    align-items: center;
    width: 100%;
    box-sizing: border-box;
  }
  .nav-box ul li {
    position: relative;
    flex: 1;
    height: 40px;
    box-sizing: border-box;
    cursor: pointer;
  }
  .nav-box ul li span {
    /* position: relative; */
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    font-size: 16px;
    font-weight: 400;
  }
  .nav-box ul li.span-active {
    color: #0075FF;
    /* background-color: #4dd0e1; */
  }
  .nav-box ul li.span-active::after {
    content: "";
    width: 10%;
    height: 2px;
    background: #0075FF;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    margin: 0 auto;
    border-radius: 2px;
  }
  @supports (bottom: env(safe-area-inset-bottom)) {
  .nav-box {
      padding-bottom: constant(safe-area-inset-bottom);
      padding-bottom: env(safe-area-inset-bottom);
  }
  }