*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}:root{--primary:#1a365d;--primary-light:#2a4a7f;--accent:#e8730c;--accent-hover:#d4670a;--text:#333;--text-light:#555;--bg:#fff;--bg-light:#f8f9fa;--bg-dark:#1a365d;--border:#e2e8f0;--shadow:0 2px 8px rgba(0,0,0,.1);--shadow-lg:0 4px 16px rgba(0,0,0,.15);--radius:8px;--transition:all .3s ease}html{scroll-behavior:smooth;font-size:16px}body{font-family:pingfang sc,microsoft yahei,noto sans sc,system-ui,-apple-system,sans-serif;color:var(--text);line-height:1.7;background:var(--bg)}h1,h2,h3,h4,h5,h6{font-family:montserrat,pingfang sc,microsoft yahei,noto sans sc,sans-serif;line-height:1.3;color:var(--primary)}a{color:var(--accent);text-decoration:none;transition:var(--transition)}a:hover{color:var(--accent-hover)}img{max-width:100%;height:auto;display:block}.container{max-width:1200px;margin:0 auto;padding:0 20px}.skip-nav{position:absolute;top:-100%;left:50%;transform:translateX(-50%);background:var(--primary);color:#fff;padding:10px 20px;z-index:10000;border-radius:0 0 var(--radius)var(--radius);transition:top .3s}.skip-nav:focus{top:0;color:#fff}.site-header{background:var(--bg);position:sticky;top:0;z-index:1000;box-shadow:var(--shadow)}.header-top{background:var(--primary);color:#fff;padding:6px 0;font-size:.85rem}.header-top .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}.header-top a{color:#fff}.header-top a:hover{color:var(--accent)}.header-main{padding:12px 0}.header-main .container{display:flex;justify-content:space-between;align-items:center}.logo{display:flex;align-items:center;gap:10px}.logo-text{font-size:1.5rem;font-weight:700;color:var(--primary);line-height:1.2}.logo-text span{display:block;font-size:.75rem;font-weight:400;color:var(--text-light)}.nav-list{display:flex;list-style:none;gap:4px}.nav-list a{padding:8px 16px;border-radius:var(--radius);color:var(--text);font-weight:500;transition:var(--transition)}.nav-list a:hover,.nav-list a[aria-current=page]{background:var(--primary);color:#fff}.hamburger{display:none;background:0 0;border:none;cursor:pointer;padding:8px;flex-direction:column;gap:5px}.hamburger span{display:block;width:24px;height:2px;background:var(--primary);transition:var(--transition)}.hero{position:relative;min-height:500px;display:flex;align-items:center;background:linear-gradient(135deg,rgba(26,54,93,.85),rgba(26,54,93,.7)),url(../images/hero-roofing.jpg)50%/cover no-repeat;color:#fff;padding:80px 0}.hero-content{max-width:650px}.hero h1{color:#fff;font-size:2.5rem;margin-bottom:16px}.hero p{font-size:1.15rem;margin-bottom:8px;opacity:.95}.hero .license{font-size:.95rem;margin-bottom:24px;opacity:.85}.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:var(--radius);font-weight:600;font-size:1rem;transition:var(--transition);border:2px solid transparent;cursor:pointer}.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}.btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:#fff}.btn-outline{background:0 0;color:#fff;border-color:#fff}.btn-outline:hover{background:#fff;color:var(--primary)}.section{padding:60px 0}.section-light{background:var(--bg-light)}.section-dark{background:var(--bg-dark);color:#fff}.section-dark h2,.section-dark h3{color:#fff}.section-title{text-align:center;margin-bottom:40px}.section-title h2{font-size:2rem;margin-bottom:12px}.section-title p{color:var(--text-light);font-size:1.05rem;max-width:600px;margin:0 auto}.section-dark .section-title p{color:rgba(255,255,255,.8)}.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.service-card{background:var(--bg);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:var(--transition)}.service-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.service-card img{width:100%;height:220px;object-fit:cover}.service-card-body{padding:24px}.service-card h3{font-size:1.25rem;margin-bottom:8px}.service-card p{color:var(--text-light);font-size:.95rem}.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}.feature-item{text-align:center;padding:24px 16px}.feature-icon{font-size:2.5rem;margin-bottom:12px}.feature-item h3{font-size:1.1rem;margin-bottom:8px}.feature-item p{color:var(--text-light);font-size:.9rem}.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}.about-content h2{font-size:2rem;margin-bottom:16px}.about-content p{margin-bottom:12px;color:var(--text-light)}.about-image img{border-radius:var(--radius);box-shadow:var(--shadow-lg)}.about-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:24px}.stat-item{text-align:center;padding:16px;background:var(--bg-light);border-radius:var(--radius)}.stat-number{font-size:2rem;font-weight:700;color:var(--accent);display:block}.stat-label{font-size:.85rem;color:var(--text-light)}.cta-banner{background:linear-gradient(135deg,var(--accent),#d4670a);color:#fff;text-align:center;padding:50px 20px}.cta-banner h2{color:#fff;font-size:1.8rem;margin-bottom:12px}.cta-banner p{margin-bottom:24px;opacity:.95;font-size:1.05rem}.cta-banner .btn{background:#fff;color:var(--accent);border-color:#fff}.cta-banner .btn:hover{background:var(--primary);color:#fff;border-color:var(--primary)}.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}.contact-info-item{display:flex;gap:16px;margin-bottom:24px}.contact-icon{flex-shrink:0;width:48px;height:48px;background:var(--bg-light);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.3rem}.contact-info-item h3{font-size:1.05rem;margin-bottom:4px}.contact-info-item p{color:var(--text-light);font-size:.95rem}.contact-map{border-radius:var(--radius);overflow:hidden;height:300px;background:var(--bg-light)}.contact-map iframe{width:100%;height:100%;border:0}.service-detail{padding:40px 0}.service-detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-bottom:40px;align-items:center}.service-detail-content h2{font-size:1.8rem;margin-bottom:16px}.service-detail-content p{color:var(--text-light);margin-bottom:12px}.service-detail-content ul{list-style:none;margin-top:16px}.service-detail-content li{padding:8px 0;padding-left:28px;position:relative;color:var(--text-light)}.service-detail-content li::before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:700}.site-footer{background:var(--primary);color:rgba(255,255,255,.85);padding:40px 0 0}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;margin-bottom:30px}.footer-about p{margin-top:12px;font-size:.9rem;line-height:1.6}.footer-links h3,.footer-contact h3{color:#fff;font-size:1rem;margin-bottom:16px}.footer-links ul{list-style:none}.footer-links a{color:rgba(255,255,255,.85);display:block;padding:4px 0;transition:var(--transition)}.footer-links a:hover{color:#fff;padding-left:4px}.footer-contact p{font-size:.9rem;margin-bottom:8px}.footer-contact a{color:rgba(255,255,255,.85)}.footer-contact a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.15);padding:16px 0;text-align:center;font-size:.85rem}.footer-bottom a{color:rgba(255,255,255,.85)}.footer-bottom a:hover{color:#fff}.footer-legal{margin-bottom:8px}.footer-legal a{margin:0 8px}.toooai-link{color:rgba(255,255,255,.85)}.toooai-link:hover{color:#fff}.lang-divider{text-align:center;padding:20px 0;position:relative}.lang-divider::before{content:"";position:absolute;top:50%;left:0;right:0;height:1px;background:var(--border)}.lang-divider span{background:var(--bg);padding:0 20px;position:relative;color:var(--primary);font-weight:600;font-size:.9rem;letter-spacing:1px}.section-light .lang-divider span{background:var(--bg-light)}.lang-zh{font-family:pingfang sc,microsoft yahei,noto sans sc,sans-serif}.phone-link{font-weight:600;font-size:1.1rem}.legal-page{padding:60px 0}.legal-page h1{font-size:2rem;margin-bottom:24px}.legal-page h2{font-size:1.4rem;margin:24px 0 12px}.legal-page p,.legal-page li{color:var(--text-light);margin-bottom:8px}.legal-page ul{padding-left:24px;margin-bottom:16px}.breadcrumb{padding:16px 0;font-size:.9rem}.breadcrumb a{color:var(--accent)}.breadcrumb span{color:var(--text-light)}.page-header{background:linear-gradient(135deg,rgba(26,54,93,.9),rgba(26,54,93,.8)),url(../images/hero-roofing.jpg)50%/cover no-repeat;color:#fff;padding:60px 0;text-align:center}.page-header h1{color:#fff;font-size:2.2rem;margin-bottom:8px}.page-header p{opacity:.9;font-size:1.05rem}@media(max-width:1024px){.features-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr}}@media(max-width:768px){.hamburger{display:flex}.nav-list{display:none;position:absolute;top:100%;left:0;right:0;background:var(--bg);flex-direction:column;padding:16px;box-shadow:var(--shadow-lg)}.nav-list.active{display:flex}.hero h1{font-size:1.8rem}.hero{min-height:400px;padding:60px 0}.services-grid{grid-template-columns:1fr}.about-grid,.contact-grid,.service-detail-grid{grid-template-columns:1fr}.features-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.section-title h2{font-size:1.6rem}.header-top .container{font-size:.8rem;justify-content:center;text-align:center}}