:root{--bg:#f7f4ee;--card:#fffdf8;--text:#1f2933;--muted:#667085;--brand:#7a5c36;--brand2:#b08a57;--line:#e7ded0;--shadow:0 18px 45px rgba(64,50,35,.12)}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.75}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.wrap{width:min(1180px,92%);margin:auto}.topbar{position:sticky;top:0;z-index:20;background:rgba(247,244,238,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}.nav{display:flex;align-items:center;justify-content:space-between;padding:15px 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