#header-placeholder{position:fixed;top:0;left:0;width:100%;z-index:1001}#header-placeholder.is-top{background-color:#fff;border-bottom:1px solid #f1f2f4}.header .nav-container{max-width:1200px;margin:0 auto;padding:0 10px;height:60px;display:flex;align-items:center;justify-content:flex-start}.header .logo{display:flex;align-items:center;gap:6px;height:28px;margin-right:20px}.header .logo a{display:flex;align-items:center;height:100%}.header .logo img{height:28px;display:block}.header .nav-menu{display:flex;gap:25px;margin-left:20px;height:60px;align-items:center}.header .nav-item{position:relative;height:100%;display:flex;align-items:center}.header .nav-item a{display:flex;align-items:center;color:#000000;font-size:14px;transition:all .3s;padding:0 5px;height:60px;line-height:60px}.header .nav-item a:hover{color:#4f46e5}.header .dropdown-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(10px);background:#fff;min-width:100px;box-shadow:0 0 30px rgba(0,0,0,0.1);opacity:0;visibility:hidden;transition:all .3s;border-radius:8px;padding:5px 0;border:1px solid #e3e5e7}.header .has-dropdown:hover .dropdown-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}.header .dropdown-menu li{padding:2px 8px}.header .dropdown-menu li a{padding:8px 20px;display:block;height:auto;line-height:1.5;white-space:nowrap;font-size:13px;border-radius:8px;text-align:center}.header .dropdown-menu li a:hover{background:#eee}.header .auth-buttons{display:flex;align-items:center;margin-left:auto;position:relative;z-index:9}.header .auth-btn{padding:8px 24px;border-radius:4px;font-size:14px;transition:all .3s;line-height:1.5;background:#4f46e5;color:#fff;border:1px solid #4f46e5}.header .auth-btn:hover{background:#6366f1;border-color:#6366f1}.header .auth-btn:active{transform:translateY(0);box-shadow:0 8px 20px rgba(67,24,255,0.2)}.header .auth-btn span{background:linear-gradient(135deg, #fff, rgba(255,255,255,0.9));-webkit-background-clip:text;-webkit-text-fill-color:transparent}.header .has-dropdown>a::after{content:'';display:inline-block;width:6px;height:6px;border:solid #000000;border-width:0 1.5px 1.5px 0;margin-left:6px;transform:translateY(-2px) rotate(45deg);transition:transform .3s ease}.header .has-dropdown:hover>a::after{transform:translateY(2px) rotate(-135deg);border-color:#4f46e5}.header .products-dropdown{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(15px);background:#fff;width:800px;display:grid;grid-template-columns:repeat(3, 1fr);gap:20px;padding:25px;box-shadow:0 15px 40px rgba(0,0,0,0.08);opacity:0;visibility:hidden;transition:all .4s cubic-bezier(.165, .84, .44, 1);border-radius:12px;z-index:1000}.header .products-dropdown::before{content:'';position:absolute;top:-8px;left:50%;transform:translateX(-50%) rotate(45deg);width:16px;height:16px;background:#fff;border-radius:3px;box-shadow:-2px -2px 5px rgba(0,0,0,0.04)}.header .products-dropdown .product-item{text-align:center;padding:15px;transition:all .3s ease;border-radius:12px;position:relative;overflow:hidden;cursor:pointer}.header .products-dropdown .product-item::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(45deg, rgba(0,123,255,0.03), rgba(0,123,255,0.06));opacity:0;transition:opacity .3s ease;border-radius:12px}.header .products-dropdown .product-item:hover{transform:translateY(-5px);box-shadow:0 8px 20px rgba(0,123,255,0.1)}.header .products-dropdown .product-item:hover::before{opacity:1}.header .products-dropdown .product-icon{width:60px;height:60px;margin:0 auto 10px;background:linear-gradient(135deg, rgba(0,123,255,0.1), rgba(0,123,255,0.05));border-radius:12px;display:flex;align-items:center;justify-content:center;transition:all .3s ease;position:relative}.header .products-dropdown .product-icon::after{content:'';position:absolute;width:100%;height:100%;border-radius:16px;border:2px solid rgba(0,123,255,0.1);top:0;left:0;transition:all .3s ease}.header .products-dropdown .product-item:hover .product-icon{transform:scale(1.05);background:linear-gradient(135deg, rgba(0,123,255,0.15), rgba(0,123,255,0.08))}.header .products-dropdown .product-item:hover .product-icon::after{transform:scale(1.1);border-color:rgba(0,123,255,0.2)}.header .products-dropdown .product-icon img{width:32px;height:32px;object-fit:contain;filter:drop-shadow(0 2px 4px rgba(0,123,255,0.1));transition:all .3s ease}.header .products-dropdown .product-title{font-size:15px;color:#333;margin-bottom:6px;font-weight:600;position:relative;padding-bottom:8px}.header .products-dropdown .product-title::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:30px;height:2px;background:linear-gradient(90deg, transparent, rgba(0,123,255,0.5), transparent);transition:all .3s ease}.header .products-dropdown .product-item:hover .product-title::after{width:50px}.header .products-dropdown .product-desc{font-size:12px;color:#666;line-height:1.5;margin-top:8px;opacity:.9;transition:all .3s ease}.header .products-dropdown .product-item:hover .product-desc{color:#444}.header .products-menu:hover .products-dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}.header .menu-toggle{display:none}