#top-icsections-container {
    position: relative;
    background-color: transparent;
    z-index: 1;

    padding-left: 0;
    padding-right: 0;
  }

  /* 2. 添加伪元素作为全屏背景 */
  #top-icsections-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100vw;
    height: 100%;
    background-color: white;
    z-index: -1;
  }

  #top-icsections-container.sticky {
    position: fixed;
    top: calc(var(--topnav-height) + 40px);
    z-index: 1000;
    left: 50%;
    transform: translateX(-50%);
    width: var(--xl-main-width);
    max-width: var(--xl-main-max-width);
    @media (max-width: 991px) {
      width: 100%;
    }
  }

  @media (min-width: 992px) and (max-width: 1300px) {
    #top-icsections-container.sticky {
      width: var(--md-main-width);
      max-width: var(--md-main-max-width);
    }
  }

  @media (max-width: 991px) {
    #top-icsections-container.sticky {
      padding-left: var(--topnav-margin-left);
      padding-right: var(--topnav-margin-left);
      box-sizing: border-box;
      top: calc(var(--topnav-height) + 40px - 11px);
    }
  }

  #top-icsections {
    display: flex;
    overflow-x: auto;
    scrollbar-width: none;
    /* Firefox */
    -ms-overflow-style: none;
    /* IE and Edge */
    white-space: nowrap;
    padding-left: 0;
    height: 40px;
  }

  #top-icsections::-webkit-scrollbar {
    display: none;
    /* Chrome, Safari and Opera */
  }

  #top-icsections button {
    flex: 0 0 auto;
    margin-right: 40px;
    height: 40px;
    padding: 12px 12px;
    cursor: pointer;
    border: none;
    background-color: transparent;
    font-family: inherit;
    color: #334466;
    font-weight: 600 !important;
    transition: color 0.3s, border-bottom 0.3s;
    border-radius: 0;
    position: relative;
  }

  @media (max-width: 1200px) {
    #top-icsections button {
      margin-right: 30px;
    }
  }
  @media screen and (max-width: 991px) {
    #top-icsections button {
      margin-right: 20px;
    }
  }

  #top-icsections button::after {
    content: '';
    position: absolute;
    left: 0%;
    bottom: 0;
    height: 2px;
    background-color: #3498db; /* 藍色下劃線 */
    width: 0;
    /*初始为0*/
    transition: width 0.5s ease;
  }

  #top-icsections button:hover::after,
  #top-icsections button.active::after {
    width: 100%;
  }

  #top-icsections button.active {
    font-weight: 700;
  }