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.btn{position:absolute;top:50%;transform:translateY(-100%);z-index:1;width:16px;height:48px;background:#b2b1b1;display:flex;align-items:center;justify-content:center;color:#fff;cursor:pointer;outline:none}.left_nav .lbt .xglist .btn i{font-size:19px}.left_nav .lbt .xglist .btn:hover{background:var(--textActiveColor)}.left_nav .lbt .xglist .btn-prev{left:0}.left_nav .lbt .xglist .btn-next{right:0}@media (min-width: 1082px){.bigflex .left_nav{margin-top:0}}@media (min-width: 1px) and (max-width: 1081px){.left_nav{width:100%;margin:16px 0}.left_nav .lbt{margin-bottom:0}.left_nav .lbt>h2{margin-bottom:16px}}#float{position:fixed;right:0;top:50%;margin-top:-80px;z-index:9}#float .ico{display:block;width:40px;height:40px;text-align:center;background:var(--textActiveColor);position:relative;cursor:pointer;margin-bottom:10px;transition:linear 0.35s;clear:both;float:right;border-top-left-radius:40px;border-bottom-left-radius:40px;box-sizing:border-box;border:1px solid #fff}#float 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