:root{--yellow:#f2cd00;--ink:#151719;--muted:#666b71}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;font-family:Arial,'Microsoft YaHei',sans-serif;color:var(--ink);background:#fff}button,select,a{-webkit-tap-highlight-color:transparent}button,select{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,select:focus-visible{outline:3px solid #c7a600;outline-offset:4px}[hidden]{display:none!important}header{height:90px;padding:0 5%;display:flex;align-items:center;gap:30px;background:white;position:sticky;top:0;z-index:20;border-bottom:1px solid #eee}.logo{width:168px;flex-shrink:0}.logo img{width:100%;height:60px;object-fit:contain}nav{display:flex;gap:30px;margin-left:auto;font-size:14px;font-weight:600}nav 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6%;box-shadow:0 10px 20px #0002}nav.open{display:flex;flex-direction:column;gap:22px;font-size:16px}.hero{min-height:560px;height:78vh;max-height:760px}.slide-copy{left:6%;top:19%;max-width:100%}h1{font-size:38px}.sub{font-size:15px}.hero-bottom{left:6%;right:6%;display:block}.arrows{position:absolute;bottom:98px;right:0}#slide-tabs button{font-size:10px;padding:18px 5px;line-height:1.5}#slide-tabs b{display:block;margin-bottom:5px}.brand-strip{font-size:8px;letter-spacing:1px;padding:20px 6%}.section{padding:58px 6%}#product-grid{grid-template-columns:1fr;gap:20px}.product-image{height:260px}.about-head,.quality{grid-template-columns:1fr;gap:20px}#steps{grid-template-columns:1fr;gap:18px}.intro{font-size:15px}#filters{gap:8px}#filters button{padding:10px 13px;font-size:12px}footer{flex-wrap:wrap;line-height:2}footer button{margin-left:0;margin-right:15px}dialog{padding:38px 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