*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:#333;line-height:1.8;scroll-behavior:smooth}.container{max-width:1100px;margin:0 auto;padding:0 20px}#navbar{position:fixed;top:0;left:0;width:100%;background:rgba(255,255,255,0.95);z-index:1000;transition:box-shadow 0.3s}#navbar.scrolled{box-shadow:0 2px 10px rgba(0,0,0,0.1)}.nav-container{max-width:1100px;margin:0 auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center;height:64px}.logo{font-size:1.5rem;font-weight:700;color:#2563eb;text-decoration:none}.nav-links{list-style:none;display:flex;gap:30px}.nav-links a{text-decoration:none;color:#555;font-size:0.95rem;transition:color 0.3s}.nav-links a:hover{color:#2563eb}.menu-toggle{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:#333}.hero{height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;background:linear-gradient(135deg,#1e3a8a 0%,#2563eb 50%,#3b82f6 100%);color:#fff}.hero-content h1{font-size:3.5rem;margin-bottom:15px;letter-spacing:2px}.hero-content p{font-size:1.3rem;margin-bottom:30px;opacity:0.9}.btn{display:inline-block;padding:12px 36px;background:#2563eb;color:#fff;border:none;border-radius:6px;font-size:1rem;cursor:pointer;text-decoration:none;transition:background 0.3s,transform 0.2s}.btn:hover{background:#1d4ed8;transform:translateY(-2px)}.hero .btn{background:#fff;color:#2563eb}.hero .btn:hover{background:#f0f0f0}.section{padding:80px 0}.section-alt{background:#f8fafc}.section-title{text-align:center;font-size:2rem;margin-bottom:50px;color:#1e3a8a;position:relative}.section-title::after{content:'';display:block;width:60px;height:3px;background:#2563eb;margin:15px auto 0;border-radius:2px}.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}.about-text p{margin-bottom:20px;color:#555}.about-stats{display:grid;grid-template-columns:1fr 1fr;gap:30px}.stat-item{text-align:center;padding:20px;background:#f8fafc;border-radius:10px}.stat-item h3{font-size:2.5rem;color:#2563eb;margin-bottom:5px}.stat-item p{color:#777;font-size:0.95rem}.products-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:30px}.product-card{background:#fff;padding:35px 25px;border-radius:12px;text-align:center;box-shadow:0 2px 15px rgba(0,0,0,0.06);transition:transform 0.3s,box-shadow 0.3s}.product-card:hover{transform:translateY(-8px);box-shadow:0 8px 30px rgba(0,0,0,0.12)}.product-icon{font-size:3rem;margin-bottom:20px}.product-card h3{font-size:1.2rem;margin-bottom:15px;color:#1e3a8a}.product-card p{color:#777;font-size:0.95rem}.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px}.contact-item{margin-bottom:25px}.contact-label{display:block;font-size:0.85rem;color:#999;margin-bottom:5px}.contact-item p{font-size:1.1rem;color:#333}.contact-form input,.contact-form textarea{width:100%;padding:12px 16px;margin-bottom:16px;border:1px solid #ddd;border-radius:6px;font-size:1rem;font-family:inherit;transition:border-color 0.3s}.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:#2563eb}.contact-form .btn{width:100%}footer{background:#1e3a8a;color:#fff;text-align:center;padding:30px 0;font-size:0.9rem}@media(max-width:768px){.menu-toggle{display:block}.nav-links{position:fixed;top:64px;left:0;width:100%;background:#fff;flex-direction:column;padding:20px;gap:15px;box-shadow:0 4px 10px rgba(0,0,0,0.1);display:none}.nav-links.active{display:flex}.hero-content h1{font-size:2.5rem}.hero-content p{font-size:1.1rem}.about-grid,.contact-grid{grid-template-columns:1fr}.section{padding:50px 0}}