hexo-theme-keep/source/css/layout/_partial/header.styl

$logo-title-font-size = 2rem;
$pc-search-icon-font-size = 1.5rem;
$menu-bar-line-height = 2.5px;

.header-wrapper {
  width: 100%;
  height: 100%;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--background-color);
  padding-top: $scroll-progress-bar-height;

  hover-style(false, 0, 0);

  .header-content {
    position: relative;
    height: 100%;
    width: $main-content-width;
    max-width: $content-max-width;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    z-index: $z-index-5;


    &.has-first-screen {
      max-width: $content-max-width * 1.2;
    }

    +keep-tablet() {
      width: $main-content-width-tablet;
    }

    +keep-mobile() {
      width: $main-content-width-mobile;
    }

    .left {
      display: flex;
      align-items: center;
      transition-t("transform", "0", "0.2", "linear");

      .header-shrink & {
        transform: scale(0.8);
        transform-origin: left;

      }

      .logo-title {
        font-size: $logo-title-font-size;
        font-weight: bold;
        letter-spacing: 1px;
        line-height: 1;
        color: var(--first-text-color);

        +keep-tablet() {
          font-size: $logo-title-font-size * 0.9;
        }

        +keep-mobile() {
          font-size: $logo-title-font-size * 0.8;
        }
      }
    }


    .right {

      .pc {

        .menu-list {
          display: flex;
          align-items: center;

          +keep-tablet() {
            display: none;
          }


          .menu-item {
            float: left;
            position: relative;
            margin-left: 30px;
            font-size: 1rem;
            cursor: pointer;
            color: var(--default-text-color);

            &:first-child {
              margin-left: 0;
            }


            a:hover, .active {

              &::after {
                content: '';
                position: absolute;
                bottom: -10px;
                left: 50%;
                width: 100%;
                height: 2px;
                transform: translateX(-50%);
                background: var(--primary-color);
                transition-t("transform, bottom", "0, 0", "0.2, 0.2", "linear, linear");

                .header-shrink & {
                  bottom: -($header-shrink-height / 2 - 12);
                }
              }
            }

            &.search {
              font-size: $pc-search-icon-font-size;
              margin-left: 26px;

              i {
                color: var(--default-text-color);
              }

            }
          }


        }

      }


      .mobile {
        display: flex;
        justify-content: space-between;
        align-items: center;

        .icon-item {
          display: none;
          position: relative;
          cursor: pointer;
          font-size: 18px;
          margin-left: 12px;
          width: 20px;
          height: 20px;
          color: var(--default-text-color);

          i {
            color: var(--default-text-color);
          }

          &:first-child {
            margin-left: 0;
          }

          +keep-tablet() {
            display: flex;
            justify-content: center;
            align-items: center;
          }
        }

        .menu-bar {

          .menu-bar-middle {
            width: 18px;
            height: $menu-bar-line-height;
            position: relative;
            background: var(--default-text-color);

            .header-drawer-show & {
              background: transparent;
            }


            &::before, &::after {
              content: '';
              position: absolute;
              left: 0;
              width: 100%;
              height: $menu-bar-line-height;
              background: var(--default-text-color);
              transition-t("transform", "0", "0.38", "ease");
            }


            &::before {
              top: -6px;

              .header-drawer-show & {
                transform: translateY(6px) rotate(45deg);
              }
            }


            &::after {
              bottom: -6px;

              .header-drawer-show & {
                transform: translateY(-6px) rotate(-45deg);
              }
            }
          }
        }
      }
    }
  }


  .header-drawer {
    width: 100%;
    padding: $header-height 0 20px 0;
    position: absolute;
    top: 0;
    left: 0;
    transform: scaleY(0);
    transform-origin: top;
    z-index: $z-index-2;
    background: var(--background-color);
    transition-t("transform", "0", "0.38", "ease");

    .header-drawer-show & {
      transform: scaleY(1);
    }

    .drawer-menu-list {
      display: flex;
      flex-direction: column;
      justify-content: flex-start;
      align-items: center;

      .drawer-menu-item {
        font-size: 1rem;
        margin: 6px 0;
        height: 38px;

        a {
          padding: 6px 20px;
          border-radius: 20px;
          color: var(--default-text-color);

          &:hover {
            color: var(--second-text-color);
            border: 1px solid var(--default-text-color);
          }


          &.active {
            border: 1px solid var(--default-text-color);
            color: var(--second-text-color);
          }
        }


      }
    }
  }


  .window-mask {
    position: absolute;
    top: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.4);
    z-index: $z-index-1;
    visibility: hidden;
    opacity: 0;
    transition-t("transform, opacity", "0, 0", "0.38, 0.38", "ease, ease");

    .header-drawer-show & {
      visibility: visible;
      opacity: 1;
    }
  }

}

.header-drawer-show {
  overflow: hidden;
}