:root{--black:#101114;--ink:#17191c;--muted:#707780;--line:#dedfe1;--paper:#fff;--soft:#f5f5f4;--orange:#f56600;--shell:min(1240px,calc(100% - 64px))}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font:15px/1.65 "Microsoft YaHei","PingFang SC",Arial,sans-serif;background:var(--paper)}a{color:inherit;text-decoration:none}.shell{width:var(--shell);margin:auto}.section{padding:112px 0}.overline{margin:0 0 13px;color:rgba(255,255,255,.72);font-size:11px;font-weight:800;letter-spacing:1.6px}.orange{color:var(--orange)}h1,h2,h3,p{margin-top:0}.site-header{position:absolute;z-index:20;top:0;width:100%;border-bottom:1px solid rgba(255,255,255,.2);color:#fff}.nav-shell{height:82px;display:flex;align-items:center;justify-content:space-between;gap:28px}.wordmark{font-size:27px;font-weight:900;letter-spacing:.2px}.wordmark span{margin-left:10px;color:#f8a05f;font-size:12px;font-weight:700}.main-nav{display:flex;height:100%;align-items:center;gap:31px}.main-nav 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/* Home product-series strip: intentionally compact so the power-bank range reads at a glance. */
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