.nut-backtop{display:none;position:fixed}.nut-backtop.show{width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:var(--nutui-gray-1, #ffffff);color:var(--nutui-gray-7, #1a1a1a);border:1px solid var(--nutui-backtop-border-color, var(--nutui-black-3, rgba(0, 0, 0, .06)));border-radius:50%}.nut-backtop.show:active{background:var(--nutui-gray-3, #f6f6f6)}.nut-backtop-main{transition:all .2s ease-in-out;color:var(--nutui-gray-7, #1a1a1a)}