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var(--primary)}.btn-solid:hover{background:var(--primary-strong);border-color:var(--primary-strong)}.btn-outline{border:1px solid #4a5d87;background:#ffffff05;color:#f3f6ff}.btn-outline:hover{border-color:#6784c2}footer{border-top:1px solid rgba(105,130,190,.25);padding:40px 0 30px}.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:28px;padding-bottom:26px;border-bottom:1px solid rgba(105,130,190,.18)}.footer-brand{display:grid;gap:10px;align-content:start}.footer-brand-mark{display:inline-flex;align-items:center;gap:10px;font-weight:800}.footer-brand-mark img{width:34px;height:34px;border-radius:8px;object-fit:contain}.footer-brand p{color:var(--muted);margin:0;max-width:34ch}.footer-col{display:grid;gap:8px;align-content:start}.footer-col h4{margin:0 0 4px;color:#cfe0ff;font-size:.95rem}.footer-col a{color:var(--muted)}.footer-col a:hover{color:var(--text)}.footer-row{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;color:var(--muted);padding-top:18px}.back-to-top{position:fixed;left:20px;bottom:20px;z-index:20;width:44px;height:44px;border-radius:50%;display:grid;place-items:center;border:1px solid rgba(109,175,255,.55);background:#09162ad9;color:#dce8ff;font-size:1.1rem;box-shadow:0 10px 28px #174dad59;transition:transform .16s ease,border-color .16s ease}.back-to-top:hover{transform:translateY(-2px);border-color:#6dafffe6}@media (max-width: 900px){.hero-grid,.contact-grid{grid-template-columns:1fr}.site-nav{display:none}.nav-toggle{display:inline-flex}.mobile-nav-panel{display:block;border-top:1px solid rgba(105,130,190,.25);background:#080e1af5}.mobile-nav{display:grid;gap:4px;padding:12px 0 18px}.mobile-nav a{padding:10px 12px;border-radius:10px;font-weight:600;color:var(--muted)}.mobile-nav a.active{color:#fff;background:#4f8cff38}.owner-grid{grid-template-columns:1fr}.owner-portrait{position:static}.owner-fact-grid,.footer-grid{grid-template-columns:1fr}.back-to-top{left:12px;bottom:12px}.site-scene{opacity:.6}.breadboard-panel,.photo-sample,.plc-panel,.computer-node{opacity:.45}.float-num{opacity:.6}.big-num{opacity:.55}.b2{left:52%;top:44%}.service-grid{grid-template-columns:1fr}.info-row{flex-direction:column;align-items:flex-start}.chat-panel{right:12px;bottom:76px}.chat-launcher{right:12px;bottom:12px}}