/* 辽宁大圻有航新型金属材料科技有限公司 */
:root{--primary:#1a3a5c;--primary-dark:#0f2540;--secondary:#c49a2c;--text:#333;--text-light:#666;--bg-light:#f5f7fa;--border:#e0e0e0}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;color:var(--text);line-height:1.7;background:#fff}
a{text-decoration:none;color:inherit;transition:color .2s}
img{max-width:100%;height:auto;display:block}
.top-bar{background:var(--primary-dark);color:#fff;font-size:13px;padding:8px 0}
.top-bar .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.navbar{background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.08);position:sticky;top:0;z-index:1000}
.navbar .container{display:flex;justify-content:space-between;align-items:center;height:70px}
.logo{display:flex;align-items:center;gap:12px}
.logo-icon{width:44px;height:44px;background:var(--primary);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;font-weight:700}
.logo-text h1{font-size:17px;color:var(--primary);line-height:1.3}
.logo-text span{font-size:12px;color:var(--text-light)}
.nav-menu{display:flex;list-style:none;gap:0}
.nav-menu li a{display:block;padding:0 22px;height:70px;line-height:70px;font-size:15px;color:var(--text);font-weight:500;position:relative}
.nav-menu li a:hover,.nav-menu li a.active{color:var(--primary)}
.nav-menu li a.active::after,.nav-menu li a:hover::after{content:'';position:absolute;bottom:0;left:22px;right:22px;height:3px;background:var(--primary);border-radius:2px 2px 0 0}
.mobile-toggle{display:none;background:none;border:none;font-size:24px;color:var(--primary);cursor:pointer}
.banner{position:relative;height:480px;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);display:flex;align-items:center;overflow:hidden}
.banner::before{content:'';position:absolute;inset:0;background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="40" r="3" fill="rgba(255,255,255,0.08)"/><circle cx="40" cy="80" r="2.5" fill="rgba(255,255,255,0.06)"/></svg>');background-size:200px}
.banner-content{position:relative;z-index:1;color:#fff}
.banner-content h2{font-size:42px;font-weight:700;margin-bottom:16px;line-height:1.2}
.banner-content p{font-size:18px;opacity:.9;margin-bottom:30px;max-width:600px}
.btn-primary{display:inline-block;padding:12px 36px;background:var(--secondary);color:#fff;font-weight:600;border-radius:6px;font-size:16px;transition:transform .2s,box-shadow .2s}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(196,154,44,.4)}
.section{padding:70px 0}
.section-title{text-align:center;margin-bottom:50px}
.section-title h2{font-size:32px;color:var(--primary);margin-bottom:12px}
.section-title p{color:var(--text-light);font-size:15px}
.section-title .line{width:50px;height:3px;background:var(--secondary);margin:16px auto 0;border-radius:2px}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.product-card{background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:transform .3s,box-shadow .3s;border:1px solid var(--border)}
.product-card:hover{transform:translateY(-6px);box-shadow:0 12px 30px rgba(0,0,0,.1)}
.product-card .img-wrap{height:200px;overflow:hidden;background:var(--bg-light)}
.product-card .img-wrap img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.product-card:hover .img-wrap img{transform:scale(1.05)}
.product-card .info{padding:20px}
.product-card h3{font-size:17px;margin-bottom:8px;color:var(--text)}
.product-card p{font-size:13px;color:var(--text-light);line-height:1.6}
.about-wrap{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.about-img{border-radius:12px;overflow:hidden;box-shadow:0 10px 40px rgba(0,0,0,.1)}
.about-text h3{font-size:28px;color:var(--primary);margin-bottom:20px}
.about-text p{margin-bottom:14px;color:var(--text-light);text-align:justify}
.about-features{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:24px}
.feature-item{display:flex;align-items:flex-start;gap:12px}
.feature-icon{width:40px;height:40px;background:rgba(26,58,92,.08);border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:18px;flex-shrink:0}
.feature-item h4{font-size:15px;margin-bottom:4px}
.feature-item span{font-size:13px;color:var(--text-light)}
.advantage-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.advantage-item{text-align:center;padding:36px 24px;background:#fff;border-radius:12px;border:1px solid var(--border);transition:all .3s}
.advantage-item:hover{border-color:var(--primary);box-shadow:0 8px 24px rgba(26,58,92,.08);transform:translateY(-4px)}
.advantage-item .icon{width:64px;height:64px;background:rgba(26,58,92,.06);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;color:var(--primary);font-size:28px}
.advantage-item h3{font-size:17px;margin-bottom:8px}
.advantage-item p{font-size:13px;color:var(--text-light)}
.news-list{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-item{background:#fff;border-radius:10px;overflow:hidden;border:1px solid var(--border);transition:all .3s}
.news-item:hover{box-shadow:0 8px 24px rgba(0,0,0,.08)}
.news-item .img-wrap{height:180px;overflow:hidden}
.news-item .img-wrap img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.news-item:hover .img-wrap img{transform:scale(1.05)}
.news-item .content{padding:20px}
.news-item .date{font-size:12px;color:var(--primary);font-weight:600;margin-bottom:8px}
.news-item h3{font-size:16px;margin-bottom:10px;line-height:1.4}
.news-item p{font-size:13px;color:var(--text-light);line-height:1.6}
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:50px}
.contact-info h3{font-size:24px;color:var(--primary);margin-bottom:24px}
.contact-info-item{display:flex;align-items:flex-start;gap:16px;margin-bottom:24px}
.contact-info-item .icon{width:48px;height:48px;background:rgba(26,58,92,.08);border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:20px;flex-shrink:0}
.contact-info-item h4{font-size:15px;margin-bottom:4px}
.contact-info-item p{font-size:14px;color:var(--text-light)}
.contact-form{background:var(--bg-light);padding:36px;border-radius:12px}
.contact-form h3{font-size:20px;margin-bottom:24px;color:var(--primary)}
.form-group{margin-bottom:18px}
.form-group label{display:block;font-size:14px;margin-bottom:6px;color:var(--text)}
.form-group input,.form-group textarea{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit;transition:border-color .2s}
.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--primary)}
.form-group textarea{resize:vertical;min-height:120px}
.btn-submit{width:100%;padding:14px;background:var(--primary);color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:background .2s}
.btn-submit:hover{background:var(--primary-dark)}
.footer{background:#0f1a26;color:#b0b8c4;padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:40px}
.footer-brand h3{color:#fff;font-size:18px;margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;margin-bottom:16px}
.footer-links h4{color:#fff;font-size:16px;margin-bottom:20px}
.footer-links ul{list-style:none}
.footer-links li{margin-bottom:10px}
.footer-links a{font-size:14px;color:#b0b8c4}
.footer-links a:hover{color:var(--secondary)}
.footer-contact p{font-size:14px;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);margin-top:40px;padding:20px 0;text-align:center;font-size:13px}
.footer-bottom a{color:#b0b8c4}
.footer-bottom a:hover{color:var(--secondary)}
.sitemap-section{padding:60px 0}
.sitemap-section h2{font-size:28px;color:var(--primary);margin-bottom:30px}
.sitemap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.sitemap-block{background:#fff;border:1px solid var(--border);border-radius:10px;padding:28px}
.sitemap-block h3{font-size:18px;color:var(--primary);margin-bottom:16px;padding-bottom:12px;border-bottom:2px solid var(--secondary);display:inline-block}
.sitemap-block ul{list-style:none}
.sitemap-block li{padding:8px 0;border-bottom:1px dashed var(--border)}
.sitemap-block li:last-child{border-bottom:none}
.sitemap-block a{font-size:14px;color:var(--text-light)}
.sitemap-block a:hover{color:var(--primary)}
.breadcrumb-wrap{background:var(--bg-light);padding:20px 0;border-bottom:1px solid var(--border)}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-light)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:#ccc}
.lazyload,.lazyloading{opacity:0}
.lazyloaded{opacity:1;transition:opacity .4s}
.pagination{display:flex;justify-content:center;gap:8px;margin-top:40px}
.pagination a{display:block;padding:8px 16px;border:1px solid var(--border);border-radius:6px;font-size:14px;color:var(--text)}
.pagination a:hover,.pagination a.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.back-to-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;background:var(--primary);color:#fff;border:none;border-radius:50%;cursor:pointer;display:none;align-items:center;justify-content:center;font-size:18px;box-shadow:0 4px 12px rgba(0,0,0,.2);z-index:999;transition:background .2s}
.back-to-top:hover{background:var(--primary-dark)}
.back-to-top.show{display:flex}
@media(max-width:992px){.about-wrap,.contact-wrap{grid-template-columns:1fr}.advantage-grid{grid-template-columns:repeat(2,1fr)}.news-list{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr}.sitemap-grid{grid-template-columns:repeat(2,1fr)}.banner{height:380px}.banner-content h2{font-size:30px}}
@media(max-width:768px){.mobile-toggle{display:block}.nav-menu{display:none;position:absolute;top:70px;left:0;right:0;background:#fff;flex-direction:column;box-shadow:0 10px 20px rgba(0,0,0,.1)}.nav-menu.active{display:flex}.nav-menu li a{height:50px;line-height:50px;border-bottom:1px solid var(--border);padding:0 20px}.nav-menu li a.active::after,.nav-menu li a:hover::after{display:none}.advantage-grid{grid-template-columns:1fr}.news-list{grid-template-columns:1fr}.about-features{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr;gap:30px}.sitemap-grid{grid-template-columns:1fr}.banner{height:320px}.banner-content h2{font-size:24px}.banner-content p{font-size:15px}.section{padding:50px 0}.section-title h2{font-size:24px}.product-grid{grid-template-columns:1fr}}