/* all回頂端按鈕 */.fixed_btn{height:0;left:0;right:0;bottom:0;position:-webkit-sticky;position:sticky;z-index:99;opacity:0}.fixed_btn.active{opacity:.5}.go_top{width:fit-content;height:fit-content;position:absolute;right:0;bottom:21px;z-index:99;transform-origin:bottom;transform:translateX(100%)}.fixed_btn.active .go_top{transform:translateX(-50%)}.go_top .btn{width:42px;height:42px;background-color:rgba(230, 230, 230, 1);border-radius:21px;border:5px solid var(--block-title-color-wt-bg);transform-origin:bottom}.go_top svg{width:100%;height:100%;color:var(--block-title-color-wt-bg);padding:4px}.fixed_btn.active .go_top::before{content:"";width:4px;height:0;background-color:rgba(34,34,36,1);display:block;position:absolute;left:50%;top:30%;z-index:1;transform:translateX(-50%);transform-origin:top;border-radius:2px;transition:.2s}/* .fixed_btn.active .go_top::after{
    content:""; width:100%; height:100%;
    position: absolute; left:0; top:0; z-index: 10; cursor: pointer;
  }
   */@media (hover){.fixed_btn.active .go_top:hover .btn{height:60px;filter:brightness(1.5) contrast(1.5)}.fixed_btn.active .go_top:hover:before{height:50%;top:28%}}@media (max-width:800px){/* 回頂端按鈕 */.fixed_btn .btn{width:38px;height:38px;border-radius:19px;border-width:4px}.fixed_btn.active .go_top::before{width:3px;top:30%}@media (hover){.fixed_btn.active .go_top:hover:before{top:25%}}}