*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Microsoft YaHei',Arial,sans-serif;line-height:1.6;color:#333}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
a{text-decoration:none;color:inherit}

.navbar{background:#c41e3a;color:#fff;padding:15px 0;position:sticky;top:0;z-index:1000}
.navbar .container{display:flex;justify-content:space-between;align-items:center}
.logo h1{font-size:24px;font-weight:bold}
.nav-links{display:flex;list-style:none;gap:30px}
.nav-links a{color:#fff;transition:opacity 0.3s}
.nav-links a:hover,.nav-links a.active{opacity:0.8}

.hero{background:linear-gradient(135deg,#c41e3a,#8b0000);color:#fff;padding:80px 0;text-align:center}
.hero h2{font-size:42px;margin-bottom:15px}
.hero-subtitle{font-size:20px;opacity:0.9;margin-bottom:40px}
.hero-features{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;margin-bottom:40px}
.feature{text-align:center}
.feature-icon{font-size:48px;display:block;margin-bottom:10px}
.feature h3{font-size:20px;margin-bottom:5px}
.feature p{opacity:0.8;font-size:14px}

.btn-primary{display:inline-block;background:#f5a623;color:#fff;padding:15px 40px;border-radius:5px;font-size:18px;font-weight:bold;transition:background 0.3s}
.btn-primary:hover{background:#e09515}
.btn-secondary{display:inline-block;border:2px solid #c41e3a;color:#c41e3a;padding:12px 30px;border-radius:5px;font-size:16px;transition:all 0.3s;margin-top:30px}
.btn-secondary:hover{background:#c41e3a;color:#fff}

.section-title{font-size:32px;text-align:center;margin-bottom:50px;color:#c41e3a}

.oem-advantages{padding:80px 0;background:#f9f9f9}
.advantages-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px}
.advantage-card{background:#fff;padding:30px;border-radius:10px;text-align:center;box-shadow:0 2px 10px rgba(0,0,0,0.1)}
.card-icon{font-size:48px;margin-bottom:15px}
.advantage-card h3{font-size:20px;margin-bottom:10px;color:#c41e3a}
.advantage-card p{color:#666}

.core-products{padding:80px 0}
.products-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px}
.product-card{border:1px solid #eee;border-radius:10px;overflow:hidden;transition:box-shadow 0.3s}
.product-card:hover{box-shadow:0 5px 20px rgba(0,0,0,0.15)}
.product-image-placeholder{background:#f0f0f0;height:200px;display:flex;align-items:center;justify-content:center;color:#999;font-size:18px}
.product-card h3{padding:20px 20px 10px;font-size:20px;color:#c41e3a}
.product-card p{padding:0 20px 20px;color:#666}
.product-features{list-style:none;padding:0 20px 20px;color:#666;font-size:14px}

.faq{padding:80px 0;background:#f9f9f9}
.faq-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(400px,1fr));gap:30px}
.faq-item{background:#fff;padding:25px;border-radius:10px;box-shadow:0 2px 10px rgba(0,0,0,0.1)}
.faq-item h3{font-size:18px;margin-bottom:10px;color:#c41e3a}
.faq-item p{color:#666;font-size:14px}

.cta{background:linear-gradient(135deg,#c41e3a,#8b0000);color:#fff;padding:60px 0;text-align:center}
.cta h2{font-size:32px;margin-bottom:15px}
.cta p{font-size:18px;opacity:0.9;margin-bottom:30px}

.footer{background:#222;color:#fff;padding:50px 0 20px}
.footer-bottom{text-align:center;padding-top:30px;border-top:1px solid #444;color:#999}

@media(max-width:768px){
.nav-links{display:none}
.hero h2{font-size:28px}
.hero-features{grid-template-columns:repeat(2,1fr)}
.faq-grid{grid-template-columns:1fr}
}

.page-header{background:#c41e3a;color:#fff;padding:60px 0;text-align:center}
.page-header h1{font-size:36px}
.about-content,.oem-content,.products-content,.certificates-content,.contact-content{padding:60px 0}
.about-content h2,.oem-content h2,.products-content h2,.certificates-content h2,.contact-content h2{font-size:28px;margin-bottom:20px;color:#c41e3a}
.about-content h3,.oem-content h3,.products-content h3,.certificates-content h3,.contact-content h3{font-size:22px;margin:25px 0 15px;color:#333}
.about-content p,.oem-content p,.products-content p,.certificates-content p,.contact-content p{margin-bottom:15px;color:#666}
.about-content ul,.oem-content ul,.products-content ul,.certificates-content ul,.contact-content ul{margin-bottom:20px;padding-left:25px;color:#666}
.about-content li,.oem-content li,.products-content li,.certificates-content li,.contact-content li{margin-bottom:8px}

.oem-features{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:30px;margin-bottom:40px}
.feature-box{background:#f9f9f9;padding:25px;border-radius:10px}
.feature-box h3{font-size:18px;margin-bottom:10px;color:#c41e3a}
.feature-box p{color:#666;font-size:14px}

.process-steps{background:#f9f9f9;padding:30px;border-radius:10px;margin-bottom:30px}
.process-steps li{margin-bottom:15px;padding-left:10px;color:#666}

.cert-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-bottom:40px}
.cert-card{background:#f9f9f9;padding:25px;border-radius:10px;text-align:center}
.cert-card h3{font-size:20px;margin-bottom:10px;color:#c41e3a}
.cert-card p{color:#666;font-size:14px}

.honor-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:15px;margin-bottom:30px}
.honor-item{background:#f9f9f9;padding:15px;border-radius:5px;color:#666}

.qualifications{list-style:none;padding:0}
.qualifications li{padding:10px 0;border-bottom:1px solid #eee;color:#666}

.contact-info{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:30px;margin-bottom:40px}
.info-item{background:#f9f9f9;padding:25px;border-radius:10px}
.info-item h3{font-size:18px;margin-bottom:10px;color:#c41e3a}
.info-item p{color:#666}

.consult-list{background:#f9f9f9;padding:30px;border-radius:10px}
.consult-list li{margin-bottom:10px;color:#666}

.page-header{background:linear-gradient(135deg,#c41e3a,#8b0000);color:#fff;padding:60px 0;text-align:center}
.page-header h1{font-size:36px}
.about-content h2,.oem-content h2,.products-content h2{font-size:28px;margin-bottom:20px;color:#c41e3a}
.about-content h3,.oem-content h3,.products-content h3{font-size:22px;margin:25px 0 15px;color:#333}
.about-content p,.oem-content p,.products-content p{margin-bottom:15px;color:#666;line-height:1.8}
.about-content ul,.oem-content ul,.products-content ul{margin-bottom:20px;padding-left:25px;color:#666}
.about-content li,.oem-content li,.products-content li{margin-bottom:8px}

.core-products{padding:80px 0;background:#fff}
.core-products .section-title{margin-bottom:40px}
.products-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:30px}
.product-card{border:1px solid #eee;border-radius:10px;overflow:hidden;transition:all 0.3s}
.product-card:hover{box-shadow:0 5px 20px rgba(0,0,0,0.15);transform:translateY(-5px)}
.product-image-placeholder{background:linear-gradient(135deg,#f5f5f5,#e0e0e0);height:180px;display:flex;align-items:center;justify-content:center;color:#999;font-size:16px;text-align:center;padding:10px}
.product-card h3{padding:15px 15px 8px;font-size:16px;color:#333}
.product-card p{padding:0 15px 15px;color:#666;font-size:14px}
@media(max-width:992px){.products-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:576px){.products-grid{grid-template-columns:1fr}}