.footer{background:#0a0d14;border-top:1px solid rgba(255,255,255,.06);padding:60px 0 30px;color:rgba(255,255,255,.7);font-size:14px}.footer__inner{max-width:1400px;margin:0 auto;padding:0 40px}.footer__brand{margin-bottom:40px}.footer__logo{height:40px;width:auto;margin-bottom:12px}.footer__tagline{font-size:14px;color:var(--color-gray);max-width:300px}.footer__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:40px;margin-bottom:40px}.footer__col-title{color:var(--color-white);font-size:15px;font-weight:600;margin-bottom:16px;font-family:var(--font-heading)}.footer__link{display:block;color:rgba(255,255,255,.6);font-size:14px;padding:4px 0;transition:color var(--transition-base)}.footer__link:hover{color:var(--color-cyan)}.footer__social{display:flex;gap:12px;margin-bottom:30px;flex-wrap:wrap}.footer__social-link{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.08);color:rgba(255,255,255,.6);transition:all var(--transition-base)}.footer__social-link:hover{background:rgba(0,229,255,.15);color:var(--color-cyan)}.footer__social-link--placeholder{font-size:16px;cursor:default;opacity:.3}.footer__lang{display:flex;align-items:center;gap:4px;margin-bottom:30px}.footer__lang-link{color:rgba(255,255,255,.5);font-size:13px;transition:color var(--transition-base);text-decoration:none}.footer__lang-link:hover{color:var(--color-cyan)}.footer__lang-link--active{color:var(--color-cyan);font-weight:600}.footer__lang-divider{color:rgba(255,255,255,.2);font-size:12px}.footer__bottom{border-top:1px solid rgba(255,255,255,.06);padding-top:20px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}.footer__copyright{color:var(--color-gray);font-size:13px}.footer__icp{font-size:12px}.footer__icp a{color:var(--color-gray);transition:color var(--transition-base)}.footer__icp a:hover{color:var(--color-cyan)}.footer__icp-divider{margin:0 8px;color:rgba(255,255,255,.2)}.back-to-top{position:fixed;bottom:30px;right:30px;z-index:999;width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--color-cyan),var(--color-tech-green));color:#fff;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transform:translateY(10px);transition:all var(--transition-smooth);box-shadow:0 4px 15px rgba(0,229,255,.3)}.back-to-top--visible{opacity:1;visibility:visible;transform:translateY(0)}.back-to-top:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(0,229,255,.4)}@media (max-width:1024px){.footer__grid{grid-template-columns:repeat(2,1fr);gap:30px}.footer__inner{padding:0 24px}}@media (max-width:768px){.footer__grid{grid-template-columns:repeat(2,1fr);gap:24px}.footer__inner{padding:0 16px}.footer__bottom{flex-direction:column;text-align:center}}