.dropdown-menu{display:block;opacity:0;visibility:hidden;transform:translateY(-10px);transition:opacity 0.2s ease-in-out, visibility 0.2s ease-in-out, transform 0.2s ease-in-out;pointer-events:none;padding-top:8px;margin-top:-8px;}.group:hover .dropdown-menu{display:block;opacity:1;visibility:visible;transform:translateY(0);pointer-events:auto;}.qr-code-popup{opacity:0;visibility:hidden;transition:opacity 0.3s ease-in-out, visibility 0.3s ease-in-out;z-index:50;}.group:hover .qr-code-popup{opacity:1;visibility:visible;}.logo-svg .logo-icon{transition:transform 0.3s ease-in-out;}.logo-svg:hover .logo-icon{transform:scale(1.05);}.responsive-img{width:100%;height:auto;object-fit:cover;transition:transform 0.3s ease-in-out;}.responsive-img:hover{transform:scale(1.02);}.loading-skeleton{background:linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);background-size:200% 100%;animation:loading 1.5s infinite;}@keyframes loading{0%{background-position:200% 0;}100%{background-position:-200% 0;}}.btn-primary{transition:all 0.2s ease-in-out;}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(0, 0, 0, 0.15);}.card-hover{transition:all 0.3s ease-in-out;}.card-hover:hover{transform:translateY(-4px);box-shadow:0 10px 25px rgba(0, 0, 0, 0.15);}.form-input:focus{outline:none;border-color:#8b5cf6;box-shadow:0 0 0 3px rgba(139, 92, 246, 0.1);}@media (max-width:768px){.mobile-menu-item{padding:12px 16px;border-left:4px solid transparent;transition:all 0.2s ease-in-out;}.mobile-menu-item:hover{background-color:#f9fafb;border-left-color:#8b5cf6;}}.gpu-accelerated{transform:translateZ(0);will-change:transform;}html{scroll-behavior:smooth;}.img-placeholder{background-color:#f3f4f6;display:flex;align-items:center;justify-content:center;min-height:200px;}.img-placeholder::before{content:"⏳ 加载中...";color:#9ca3af;font-size:14px;}.navbar{backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);}.navbar-sticky{position:sticky;top:0;z-index:100;transition:all 0.3s ease-in-out;}.navbar-scrolled{background-color:rgba(255, 255, 255, 0.95);box-shadow:0 1px 3px rgba(0, 0, 0, 0.1);}.product-card{border-radius:12px;overflow:hidden;background:white;box-shadow:0 2px 8px rgba(0, 0, 0, 0.08);transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);}.product-card:hover{transform:translateY(-8px);box-shadow:0 20px 40px rgba(0, 0, 0, 0.12);}.product-card-image{aspect-ratio:16/9;overflow:hidden;}.product-card-image img{width:100%;height:100%;object-fit:cover;transition:transform 0.3s ease-in-out;}.product-card:hover .product-card-image img{transform:scale(1.05);}.solution-card{background:linear-gradient(135deg, #667eea 0%, #764ba2 100%);color:white;border-radius:16px;position:relative;overflow:hidden;}.solution-card::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);pointer-events:none;}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 24px;border-radius:8px;font-weight:500;text-decoration:none;transition:all 0.2s ease-in-out;border:none;cursor:pointer;position:relative;overflow:hidden;}.btn::before{content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);transition:left 0.5s;}.btn:hover::before{left:100%;}.btn-primary{background:linear-gradient(135deg, #667eea 0%, #764ba2 100%);color:white;}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(102, 126, 234, 0.4);}.btn-secondary{background:white;color:#4a5568;border:2px solid #e2e8f0;}.btn-secondary:hover{background:#f7fafc;border-color:#cbd5e0;}.form-group{margin-bottom:24px;}.form-label{display:block;font-weight:500;color:#374151;margin-bottom:8px;}.form-input{width:100%;padding:12px 16px;border:2px solid #e5e7eb;border-radius:8px;font-size:16px;transition:all 0.2s ease-in-out;background:white;}.form-input:focus{outline:none;border-color:#8b5cf6;box-shadow:0 0 0 3px rgba(139, 92, 246, 0.1);}.form-input:invalid{border-color:#ef4444;}.form-input:invalid:focus{box-shadow:0 0 0 3px rgba(239, 68, 68, 0.1);}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0, 0, 0, 0.5);backdrop-filter:blur(4px);z-index:1000;opacity:0;visibility:hidden;transition:all 0.3s ease-in-out;}.modal-overlay.active{opacity:1;visibility:visible;}.modal-content{background:white;border-radius:12px;max-width:500px;margin:50px auto;padding:32px;transform:scale(0.9) translateY(-50px);transition:all 0.3s ease-in-out;}.modal-overlay.active .modal-content{transform:scale(1) translateY(0);}.spinner{width:40px;height:40px;border:4px solid #f3f3f3;border-top:4px solid #3498db;border-radius:50%;animation:spin 1s linear infinite;}@keyframes spin{0%{transform:rotate(0deg);}100%{transform:rotate(360deg);}}::-webkit-scrollbar{width:8px;}::-webkit-scrollbar-track{background:#f1f1f1;}::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:4px;}::-webkit-scrollbar-thumb:hover{background:#a8a8a8;}@media (max-width:1024px){.btn{padding:10px 20px;font-size:14px;}}@media (max-width:768px){.product-card, .solution-card{margin-bottom:20px;}.btn{padding:12px 20px;width:100%;justify-content:center;}.modal-content{margin:20px;padding:24px;}}@media (max-width:480px){.form-input{padding:10px 14px;font-size:16px;}}