.scroll-to-top{position:fixed;bottom:40px;right:40px;width:40px;height:40px;background:#308da5;color:#fff;text-align:center;line-height:40px;border-radius:50%;cursor:pointer;transition:opacity 0.3s,visibility 0.3s;opacity:0;visibility:hidden;z-index:1000}.scroll-to-top.show{opacity:1;visibility:visible}.scroll-to-top svg{width:24px;height:24px;fill:none;stroke:#fff;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.scroll-to-top a{display:inline-block;width:100%;height:100%;line-height:40px}