:root{--color-primary:#1a365d;--color-primary-light:#2a4a7f;--color-accent:#d97706;--color-accent-light:#f59e0b;--color-bg:#f9fafb;--color-bg-alt:#f1f5f9;--color-text:#1f2937;--color-text-light:#6b7280;--color-border:#e5e7eb;--color-white:#fff;--max-width:800px;--header-height:64px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{color:var(--color-text);background-color:var(--color-bg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:17px;line-height:1.7}a{color:var(--color-primary);text-decoration:none}a:hover{color:var(--color-accent)}img{max-width:100%;height:auto}.site-header{background:var(--color-primary);color:var(--color-white);height:var(--header-height);z-index:100;justify-content:center;align-items:center;padding:0 20px;display:flex;position:sticky;top:0;box-shadow:0 2px 8px #00000026}.header-inner{max-width:var(--max-width);justify-content:space-between;align-items:center;width:100%;display:flex}.header-logo{color:var(--color-white);align-items:center;gap:10px;font-size:1.2rem;font-weight:700;text-decoration:none;display:flex}.header-logo:hover{color:var(--color-accent-light)}.header-logo svg{width:36px;height:36px}.header-nav{align-items:center;gap:20px;display:flex}.header-nav a{color:#ffffffd9;font-size:.95rem;font-weight:500;text-decoration:none;transition:color .2s}.header-nav a:hover{color:var(--color-accent-light)}.mobile-menu-btn{color:#fff;cursor:pointer;background:0 0;border:none;padding:4px;font-size:1.5rem;display:none}.site-footer{background:var(--color-primary);color:#fffc;margin-top:60px;padding:40px 20px 24px}.footer-inner{max-width:var(--max-width);margin:0 auto}.footer-nav{border-bottom:1px solid #ffffff26;flex-wrap:wrap;gap:16px 32px;margin-bottom:24px;padding-bottom:24px;display:flex}.footer-nav a{color:#ffffffbf;font-size:.95rem;text-decoration:none;transition:color .2s}.footer-nav a:hover{color:var(--color-accent-light)}.footer-copy{color:#ffffff80;font-size:.85rem}.page-container{max-width:var(--max-width);margin:0 auto;padding:32px 20px 0}.hero{background:linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);color:var(--color-white);text-align:center;padding:60px 20px}.hero h1{margin-bottom:16px;font-size:2.2rem;line-height:1.3}.hero p{opacity:.9;max-width:650px;margin:0 auto 24px;font-size:1.15rem;line-height:1.6}.hero-cta{background:var(--color-accent);color:var(--color-white);border-radius:6px;padding:14px 32px;font-size:1.05rem;font-weight:600;text-decoration:none;transition:background .2s;display:inline-block}.hero-cta:hover{background:var(--color-accent-light);color:var(--color-white)}.article-header{border-bottom:2px solid var(--color-border);margin-bottom:32px;padding-bottom:20px}.article-header h1{color:var(--color-primary);margin-bottom:8px;font-size:2rem;line-height:1.3}.article-content h2{color:var(--color-primary);border-bottom:1px solid var(--color-border);margin:40px 0 16px;padding-bottom:8px;font-size:1.5rem}.article-content h3{color:var(--color-primary-light);margin:28px 0 12px;font-size:1.2rem}.article-content p{margin-bottom:16px}.article-content ul,.article-content ol{margin:0 0 16px 24px}.article-content li{margin-bottom:6px}.article-content table{border-collapse:collapse;width:100%;margin:20px 0;font-size:.95rem}.article-content th,.article-content td{border:1px solid var(--color-border);text-align:left;padding:10px 14px}.article-content th{background:var(--color-primary);color:var(--color-white);font-weight:600}.article-content tr:nth-child(2n){background:var(--color-bg-alt)}.article-content strong{color:var(--color-primary)}.article-content hr{border:none;border-top:1px solid var(--color-border);margin:32px 0}.toc{background:var(--color-bg-alt);border:1px solid var(--color-border);border-radius:8px;margin-bottom:32px;padding:20px 24px}.toc-title{color:var(--color-primary);margin-bottom:12px;font-size:1rem;font-weight:700}.toc ul{margin:0;padding:0;list-style:none}.toc li{margin-bottom:6px}.toc a{color:var(--color-text-light);font-size:.95rem;text-decoration:none;transition:color .2s}.toc a:hover{color:var(--color-accent)}.toc .toc-h2{padding-left:0}.toc .toc-h3{padding-left:16px;font-size:.9rem}.faq-section{border-top:2px solid var(--color-border);margin-top:48px;padding-top:32px}.faq-section h2{color:var(--color-primary);margin-bottom:24px;font-size:1.5rem}.faq-item{border:1px solid var(--color-border);border-radius:8px;margin-bottom:20px;overflow:hidden}.faq-question{text-align:left;background:var(--color-bg-alt);width:100%;color:var(--color-primary);cursor:pointer;border:none;justify-content:space-between;align-items:center;padding:16px 20px;font-family:inherit;font-size:1.05rem;font-weight:600;line-height:1.4;transition:background .2s;display:flex}.faq-question:hover{background:var(--color-border)}.faq-question:after{content:"+";color:var(--color-accent);flex-shrink:0;margin-left:12px;font-size:1.4rem;font-weight:400}.faq-item.open .faq-question:after{content:"−"}.faq-answer{background:var(--color-white);padding:16px 20px;display:none}.faq-item.open .faq-answer{display:block}.faq-answer p{color:var(--color-text);margin-bottom:12px;line-height:1.6}.faq-answer p:last-child{margin-bottom:0}.cards-grid{grid-template-columns:1fr;gap:20px;margin:32px 0;display:grid}.card{background:var(--color-white);border:1px solid var(--color-border);border-radius:8px;padding:24px;transition:box-shadow .2s}.card:hover{box-shadow:0 4px 12px #00000014}.card h3{color:var(--color-primary);margin-bottom:8px;font-size:1.1rem}.card h3 a{color:var(--color-primary);text-decoration:none}.card h3 a:hover{color:var(--color-accent)}.card p{color:var(--color-text-light);font-size:.95rem;line-height:1.5}.product-page{max-width:var(--max-width);margin:0 auto;padding:32px 20px}.product-header h1{color:var(--color-primary);margin-bottom:8px;font-size:1.8rem}.product-price{color:var(--color-accent);margin-bottom:20px;font-size:1.5rem;font-weight:700}.product-description{margin-bottom:24px;line-height:1.7}.product-details{background:var(--color-bg-alt);border-radius:8px;margin-bottom:24px;padding:20px 24px}.product-details h3{color:var(--color-primary);margin-bottom:12px}.product-details ul{padding:0;list-style:none}.product-details li{border-bottom:1px solid var(--color-border);padding:6px 0;font-size:.95rem}.product-details li:last-child{border-bottom:none}.page-404{text-align:center;padding:80px 20px}.page-404 h1{color:var(--color-primary);margin-bottom:8px;font-size:4rem}.page-404 h2{color:var(--color-text-light);margin-bottom:20px;font-size:1.5rem;font-weight:400}.page-404 p{color:var(--color-text-light);margin-bottom:24px}.page-404 a{background:var(--color-accent);color:var(--color-white);border-radius:6px;padding:12px 28px;font-weight:600;text-decoration:none;transition:background .2s;display:inline-block}.page-404 a:hover{background:var(--color-accent-light);color:var(--color-white)}.section-heading{color:var(--color-primary);border-bottom:2px solid var(--color-accent);margin:40px 0 20px;padding-bottom:8px;font-size:1.5rem}.info-section{background:var(--color-white);border:1px solid var(--color-border);border-radius:8px;margin:24px 0;padding:28px}.info-section h2{color:var(--color-primary);margin-bottom:12px;font-size:1.3rem}.info-section p{color:var(--color-text);margin-bottom:12px;line-height:1.7}.info-section p:last-child{margin-bottom:0}.breadcrumb{color:var(--color-text-light);margin-bottom:20px;font-size:.85rem}.breadcrumb a{color:var(--color-text-light)}.breadcrumb a:hover{color:var(--color-accent)}.breadcrumb span{margin:0 6px}@media (max-width:768px){body{font-size:16px}.header-nav{top:var(--header-height);background:var(--color-primary);flex-direction:column;gap:12px;padding:16px 20px;display:none;position:absolute;left:0;right:0;box-shadow:0 4px 12px #0003}.header-nav.open{display:flex}.mobile-menu-btn{display:block}.hero{padding:40px 16px}.hero h1{font-size:1.6rem}.hero p{font-size:1rem}.article-header h1{font-size:1.5rem}.article-content h2{font-size:1.25rem}.page-container{padding:20px 16px 0}.footer-nav{flex-direction:column;gap:10px}.page-404 h1{font-size:3rem}.product-header h1{font-size:1.4rem}}