4dkankan_official/src/page/layout/header/style.scss

 .header-layout.active {
    $bgcolor: #101010;
    $color: #fff;
    $activeColor: #7f7f7f;

    .logo .icon-logo_b {
      color: $color;
    }

    .ctrl a {
      &.user {
        background-color: $color;
        color: $bgcolor
      }
      &.search i{
        color: $color
      }
      span {
        color: $bgcolor;
      }
    }

    .menu {
      .lang a{
        color: $activeColor;
        &.active {
          color: $color;
        }
        &::hover{
          color: $color;
        }
      }

      .list {
        // border-left: 1px solid $color;
        a {
          color: $color;
          &::after {
            border-top-color: $color !important;
          }
          &.active {
            color: $activeColor;
            &::after {
              border-top-color: $activeColor !important;
            }
          }
        }
      }
    }

    &::after {
      bottom: 0;
    }
  }

  .header-layout {
    $bgcolor: #fff;
    $color: #101010;
    $activeColor: #7f7f7f;
    $margin: 25px;
    $lrwidth: 340px;
    $ts: all .7s cubic-bezier(.77,0,.175,1);
    justify-content: space-between;

    background-color: $bgcolor;
    display: flex;

    .logo .icon-logo_b {
      transition: $ts;
      color: $color;
    }

    .ctrl a {
      &.user {
        background-color: $color;
        transition: $ts;
        color: $bgcolor
      }
      &.search i{
        color: $color;
        transition: $ts;
      }
      span {
        color: $bgcolor;
        transition: $ts;
      }
    }

    .menu {
      .lang a{
        transition: $ts;
        color: $activeColor;
        &:hover{
          color: $activeColor;
        }
        &.active {
          color: $color;
        }
      }

      .list {
        border-left: 1px solid $activeColor;
        transition: $ts;
        a {
          transition: $ts;
          color: $color;
          &::after {
            transition: $ts;
            border-top-color: $color !important;
          }
          &.active {
            color: $activeColor;
            &::after {
              transition: $ts;
              border-top-color: $activeColor !important;
            }
          }
        }
      }
    }

    &::after {
      transition: $ts;
      content: '';
      position: absolute;
      left: 0;
      right: 0;
      bottom: 100%;
      height: 100%;
      background-color: $color;
      z-index: 1
    }

    .logo-layout {
      flex: 0 1 340px;
      text-align: center;
    
      .logo {
        width: 150px;
        z-index: 2;
        position: relative;
        height: 100%;
        display: inline-block;

        i {
          position: absolute;
          left: 50%;
          top: 60%;
          transform: translateX(-50%) translateY(-50%);
        }

        .icon-logo_b {
          font-size: 110px;
        }

        .icon-logo_a {
          font-size: 40px;
          margin-left: -48px;
          margin-top: -6px;
          color: #1fe4dc;
        }
      }
    }
    .ctrl {
      z-index: 2;
      text-align: right;
      flex: 0 0 auto;

      a {
        display: inline-block;
        text-decoration: none;
        padding: 0 14px;
        height: 100%;

        i, span {
          display: inline-block;
          vertical-align: middle;
        }
        i {
          font-size: 24px;
        }

        span {
          font-size: 16px;
          margin-left: 4px;
          font-weight: bold;
        }
      }

      .search {
        position: relative;
        .hide, .open {
          transition: $ts
        }

        .open {
          opacity: 1;
          transform: scale(1);
        }

        .hide {
          position: absolute;
          opacity: 0;
          transform: scale(0);
          position: absolute;
          left: 50%;
          top: 50%;
          transform: translateX(-50%) translateY(-50%);
          font-size: 16px;
        }

        &.active {
          .open {
            opacity: 0;
            transform: scale(0);
          }

          .hide {
            opacity: 1;
            transform: scale(1) translateX(-50%) translateY(-50%);;
          }
        }
      }
    }

    .menu {
      z-index: 2;
      $lwidth: 260px;
      padding-left: $lwidth;
      position: relative;
      flex: 1;

      .lang {
        box-sizing: border-box;
        position: absolute;
        width: $lwidth;
        padding-left: 60px;
        left: 0;
        top: 50%;
        transform: translateY(-50%);

        a {
          display: inline-block;
          font-size: 16px;
          font-weight: bold;
          margin-left: 5px;
          &:hover{
            color: $activeColor;
          }
        }
      }

      .list {
        padding: 0 20px;

        a {
          display: inline-block;
          padding: $margin 20px $margin 0;
          margin-right: 50px;
          font-size: 16px;
          text-decoration: none;
          font-weight: bold;
          position: relative;

          &::after {
            display: none;
            content: '';
            border: 6px solid transparent;
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
          }
          &:last-child {
            margin-right: 0;
          }
        }
      }
    }
  }