.site-footer{background:#1c1e22;color:#9aa0a8;padding:56px 0 0;line-height:1.7;font-size:14px}
.site-footer .wrap{max-width:1280px;margin:0 auto;padding:0 24px}
.site-footer .f-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:36px;border-bottom:1px solid #2c2f35}
.site-footer .f-brand .f-logo{font-size:26px;font-weight:800;color:#fff;letter-spacing:1px;line-height:1}
.site-footer .f-brand .f-logo b{color:#ff6f06}
.site-footer .f-brand .f-desc{margin-top:14px;color:#9aa0a8;line-height:1.7;max-width:340px}
.site-footer .f-cert{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.site-footer .f-cert a{color:#7d838c;font-size:13.5px;transition:.2s;line-height:1}
.site-footer .f-cert a:hover{color:#c8ccd2}
.site-footer .f-col h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:700}
.site-footer .f-col a{display:flex;align-items:center;margin-bottom:10px;color:#9aa0a8;font-size:14px;transition:.15s}
.site-footer .f-col a::before{content:"";display:inline-block;width:4px;height:4px;background:#ff6f06;border-radius:50%;margin-right:8px;opacity:0;transition:.2s}
.site-footer .f-col a:hover{color:#ff6f06}
.site-footer .f-col a:hover::before{opacity:1}
.site-footer .f-contact p{margin-bottom:12px;color:#bbb;font-size:14px;display:flex;align-items:center;gap:8px}
.site-footer .f-contact p b{color:#fff;font-weight:600;min-width:32px}
.site-footer .f-contact p span{color:#c8ccd2}
.site-footer .wx-qr{display:inline-flex;align-items:center;gap:10px;background:#fff;border-radius:8px;padding:8px 12px 8px 8px}
.site-footer .wx-qr img{width:84px;height:84px;display:block;object-fit:contain;border-radius:4px}
.site-footer .wx-qr em{font-style:normal;color:#444;font-size:12.5px;line-height:1.6}
.site-footer .f-friends{padding:18px 0;border-bottom:1px solid #2c2f35;color:#9aa0a8;font-size:13px;line-height:1.9;display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.site-footer .f-friends span{color:#fff;font-weight:600}
.site-footer .f-friends a{color:#9aa0a8;margin-right:14px;display:inline-block;transition:.15s}
.site-footer .f-friends a:hover{color:#ff6f06}
.site-footer .f-bot{display:flex;justify-content:space-between;align-items:center;padding:18px 0;color:#6d737b;font-size:13px}
.site-footer .f-bot a{color:#6d737b;margin-left:16px}
.site-footer .f-bot a:hover{color:#fff}
#backTop{position:fixed;right:24px;bottom:40px;width:42px;height:42px;border-radius:8px;background:#fff;border:1px solid #eceef3;display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;visibility:hidden;transition:opacity .2s,visibility .2s,background .15s,border-color .15s;z-index:80}
#backTop.show{opacity:1;visibility:visible}
#backTop:hover{background:#ff6f06;border-color:#ff6f06}
#backTop:hover svg{stroke:#fff}
@media(max-width:900px){.site-footer .f-top{grid-template-columns:1fr;gap:28px}.site-footer .f-bot{flex-direction:column;gap:8px;text-align:center}#backTop{right:14px;bottom:20px}}