:root{--red:rgb(213,5,5);--dark:#151515;--text:#333;--muted:#666;--light:#f6f6f6;--line:#e8e8e8;--soft:#fff3f3;--shadow:0 14px 34px rgba(20,20,20,.08)}*{box-sizing:border-box}body{margin:0;font-family:Arial,"Microsoft YaHei",sans-serif;color:var(--text);background:#fff;line-height:1.75}a{text-decoration:none;color:inherit}img{max-width:100%;height:auto;display:block}.container{width:min(1200px,calc(100% - 32px));margin:auto}.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:1000}.desktop-top{display:none}.mobile-top{height:62px;display:grid;grid-template-columns:70px 1fr 86px;align-items:center;padding:0 14px}.logo img{max-height:44px;width:auto}.mobile-logo{justify-self:center}.menu-btn{width:44px;height:44px;border:0;background:#fff;display:grid;place-content:center;gap:5px}.menu-btn 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