:root{--blue:#2563eb;--navy:#1e3a5f;--amber:#f59e0b;--bg:#f8fafc;--text:#172033;--muted:#64748b;--line:#e2e8f0;--white:#fff;--shadow:0 18px 45px rgba(30,58,95,.12)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);font:16px/1.7 system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;background:var(--white)}img{max-width:100%;display:block}button,a{font:inherit}.container{width:min(1180px,calc(100% - 40px));margin:auto}.narrow{max-width:860px}.site-header{height:76px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between}.brand img{width:244px;height:auto}.primary-nav{display:flex;gap:28px;align-items:center}.primary-nav a,.site-footer a{text-decoration:none;color:var(--navy);font-weight:650}.primary-nav .nav-cta{padding:9px 18px;border-radius:10px;background:var(--blue);color:#fff}.menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:9px;padding:8px 12px}.hero{background:linear-gradient(135deg,#eef6ff 0%,#f8fafc 55%,#fff8e8 100%);padding:74px 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@media(max-width:760px){.site-header{height:66px}.container{width:min(100% - 28px,1180px)}.brand img{width:210px}.menu-toggle{display:block}.primary-nav{display:none;position:absolute;top:66px;left:0;right:0;padding:16px 20px;flex-direction:column;align-items:stretch;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 12px 22px rgba(30,58,95,.1)}.primary-nav.is-open{display:flex}.primary-nav a{text-align:center}.hero{padding:50px 0}.hero-grid,.guide-grid{grid-template-columns:1fr}.hero-copy{order:1}.platform-entry-card{order:2}.hero h1{font-size:36px}.section{padding:60px 0}.product-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.product-card>div{padding:11px}.more-products-card{min-height:220px;padding:20px}.info-grid.three,.info-grid.four,.steps,.check-list{grid-template-columns:1fr}.footer-inner{align-items:flex-start;flex-direction:column;gap:15px}}
@media(max-width:380px){.brand img{width:190px}.hero h1{font-size:32px}}