:root{--bg:#F3F6F9;--surface:#FFFFFF;--soft:#E8EEF5;--title:#0B1220;--text:#1E293B;--muted:#475569;--assist:#64748B;--blue:#2563EB;--blue2:#60A5FA;--deepblue:#1D4ED8;--lime:#65A30D;--slate:#334155;--line:rgba(37,99,235,.16);--shadow:0 14px 36px rgba(11,18,32,.08);--max:1180px;--radius:18px}*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}img{display:block;max-width:100%;height:auto}body.overlay-open{overflow:hidden}.site-header{position:fixed;inset:0 0 auto;z-index:80}.status-bar{height:32px;background:var(--slate);color:#fff}.bar-inner{width:min(var(--max),calc(100% - 32px));margin:0 auto}.status-bar .bar-inner{height:32px;display:flex;align-items:center;justify-content:space-between}.status-brand{font-size:12px;font-weight:700;letter-spacing:.08em}.icon-text-btn{border:0;background:transparent;color:#fff;min-height:32px;padding:0 8px}.command-bar{height:60px;background:#fff;border-bottom:1px solid rgba(51,65,85,.08)}.command-inner{height:60px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px}.menu-square{width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:12px;padding:11px;display:grid;align-content:center;gap:4px}.menu-square span{height:2px;background:var(--blue);border-radius:99px}.command-logo{justify-self:center;display:flex;align-items:center;min-height:44px}.command-logo img{max-height:32px;width:auto}.command-logo strong{font-size:20px;color:var(--title);letter-spacing:.02em}.app-link{justify-self:end;min-height:44px;padding:0 18px;border-radius:999px;background:linear-gradient(135deg,var(--blue2) 0%,var(--blue) 52%,var(--deepblue) 100%);color:#fff;display:inline-flex;align-items:center;font-weight:700}.desktop-tabs{height:44px;background:#fff;border-bottom:1px solid rgba(51,65,85,.08)}.tab-inner{height:44px;display:flex;align-items:stretch;gap:30px}.desktop-tabs a{position:relative;display:flex;align-items:center;color:var(--muted);font-size:14px}.desktop-tabs a.active{color:var(--blue);font-weight:700}.desktop-tabs a.active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;border-radius:3px;background:var(--blue)}.site-main{padding-top:156px}.container{width:min(var(--max),calc(100% - 32px));margin:0 auto}.page-hero{padding:42px 0 24px}.eyebrow{margin:0 0 8px;color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.12em}.page-hero h1,.cover-copy h1{font-size:clamp(28px,3.2vw,32px);line-height:1.25;margin:0 0 14px;color:var(--title);letter-spacing:-.03em}.lead{font-size:17px;color:var(--muted);max-width:820px;margin:0}.section{padding:26px 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@media (max-width:680px){body{padding-bottom:calc(50px + env(safe-area-inset-bottom))}.bar-inner,.container,.footer-inner,.mosaic-shell{width:calc(100% - 32px)}.desktop-tabs{display:none}.site-main{padding-top:104px}.status-bar,.status-bar .bar-inner{height:32px}.command-bar,.command-inner{height:60px}.command-inner{grid-template-columns:44px minmax(0,1fr) 88px}.command-logo{max-width:140px;overflow:hidden}.command-logo img{max-width:130px}.app-link{padding:0 12px;font-size:13px;white-space:nowrap}.page-hero{padding-top:30px}.cover-wrap{padding-top:24px}.cover-card,.article-panel{padding:20px}.grid-2,.grid-4,.career-grid,.contact-grid,.mural-grid{grid-template-columns:1fr}.theme-strip{grid-template-columns:1fr}.theme-strip a{border-right:0!important;border-bottom:1px solid var(--line)!important;min-height:auto}.theme-strip a:last-child{border-bottom:0!important}.pulse-layout{grid-template-columns:1fr}.file-row{grid-template-columns:44px 1fr}.file-row .link-arrow{grid-column:2}.meter-row{grid-template-columns:68px 1fr}.meter-num{font-size:36px}.catalog-row{grid-template-columns:44px 1fr}.catalog-row .link-arrow{grid-column:2}.serial-step{grid-template-columns:54px 1fr}.footer-brand-row{display:grid}.footer-grid{grid-template-columns:repeat(2,1fr)}.mosaic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.mosaic-grid a{padding:15px;min-height:122px}.search-layer{inset:0;transform:none!important;width:auto;background:#F3F6F9;padding:92px 16px 70px;overflow:auto}.search-card{box-shadow:none;border:0;padding:0;background:transparent}.mobile-bottom{position:fixed;display:grid;grid-template-columns:repeat(5,1fr);left:0;right:0;bottom:0;height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);z-index:70;background:#fff;border-top:1px solid var(--line)}.mobile-bottom a{display:grid;place-items:center;align-content:center;min-width:0;font-size:11px;color:var(--assist);line-height:1.2}.mobile-bottom a span{font-size:15px}.mobile-bottom a.active{color:var(--blue);font-weight:800}.section-head{align-items:flex-start;flex-direction:column;gap:4px}.page-hero h1,.cover-copy h1{font-size:28px}.overlay-backdrop{z-index:89}.mosaic-menu,.search-layer{z-index:90}}