.scrollup{border:1px solid;bottom:82px;cursor:pointer;display:none;font-size:13px;font-weight:600;min-height:40px;padding:2px;position:fixed;text-align:center;width:40px;z-index:9999}.scrollup:hover{border-color:#fff;text-decoration:none}.scroll-img{display:block;margin:0 auto}.scrollup .scroll-img.default-img{display:block}.scrollup .scroll-img.hover-img{display:none}.scrollup:hover .scroll-img.default-img{display:none}.scrollup:hover .scroll-img.hover-img{display:block}