:root{--blue:#1478F2;--blue2:#2F8CFF;--deep:#075DC9;--navy:#172033;--text:#3E4859;--muted:#6F7A89;--soft:#F7FAFF;--pale:#EDF5FF;--gray:#F5F6F8;--border:rgba(20,120,242,.12);--g-border:rgba(30,50,70,.08);--shadow:0 14px 38px rgba(21,67,118,.08);--blue-shadow:0 16px 42px rgba(20,120,242,.15);--radius:16px;--max:1280px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:#fff;line-height:1.75;overflow-x:hidden}body.locked{overflow:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}button,input{font:inherit}.wrap{width:min(var(--max),calc(100% - 40px));margin-inline:auto}.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--g-border)}.desktop-nav{height:74px;display:grid;grid-template-columns:auto 1fr 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@media(max-width:760px){.wrap{width:min(100% - 30px,var(--max))}.desktop-nav{display:none}.mobile-nav{display:flex}.site-header{top:0}.section{padding:50px 0}.section-title{font-size:34px}.hero{padding-top:24px}.hero-editorial{display:flex;flex-direction:column}.hero-copy{order:1;padding:24px}.hero-copy h1{font-size:39px}.hero-visual{order:2;min-height:250px}.hero-side{order:3;display:grid;grid-template-columns:1fr 1fr}.grid-2,.grid-3,.grid-4,.feature-split,.app-showcase,.safety-grid{grid-template-columns:1fr}.topic-list{grid-template-columns:1fr}.timeline article{grid-template-columns:1fr;gap:4px}.masonry{columns:1}.brand-declare{padding:28px}.brand-declare h2{font-size:30px}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.site-footer{padding-bottom:92px}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:110;display:grid;grid-template-columns:repeat(5,1fr);background:#fff;border-top:1px solid var(--g-border);padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{min-height:54px;display:grid;place-items:center;font-size:13px;color:var(--muted)}.mobile-bottom a.active{color:var(--blue);font-weight:800}.channel-menu,.search-panel{top:64px;bottom:0;left:auto;width:min(88vw,390px);max-height:none;transform:translateX(100%)}.channel-menu.open,.search-panel.open{transform:none}.search-panel{width:100vw}.mega-grid{grid-template-columns:1fr;padding-bottom:40px}.search-links{grid-template-columns:1fr 1fr}.panel-head{position:sticky;top:0;background:#fff;padding-bottom:12px;z-index:1}.channel-strip .inner{padding-left:0}.app-image{min-height:300px}}
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