:root{--ink:#171717;--paper:#f6f2ea;--accent:#ff5e45;--blue:#1c65ff;--line:rgba(23,23,23,.15);--pad:clamp(20px,4vw,64px)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,"PingFang SC","Microsoft YaHei",Arial,sans-serif}img{display:block;width:100%}a{color:inherit;text-decoration:none}.site-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;padding:14px var(--pad);background:rgba(246,242,234,.9);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.brand{display:flex;gap:10px;align-items:center}.brand-mark{display:grid;place-items:center;width:38px;height:38px;background:var(--ink);color:#fff;border-radius:50%;font-weight:800}.brand strong,.brand small{display:block}.brand small{font-size:9px;letter-spacing:.16em;margin-top:3px}.site-header nav{display:flex;gap:26px;align-items:center;font-size:14px}.nav-cta{padding:9px 15px;border:1px solid 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/* V2 refinements: no placeholder logo, warmer editorial voice */
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